JP3471209B2 - Refrigerator control device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a refrigerator having a first cooling chamber and a second cooling chamber which are insulated from each other.

[0002]

2. Description of the Related Art FIG. 14 is a transparent perspective view showing a schematic structure of a conventional example of the refrigerator as described above. In this refrigerator, a rectangular parallelepiped heat insulating cabinet 40 is divided by a heat insulating partition 39 into a refrigerating room 37 and a freezing room 38. A refrigerating compartment evaporator 44 and a refrigerating compartment fan 46 are provided on the back side of the refrigerating compartment 37 formed on the upper side, and a freezing compartment evaporator 45 and a refrigerating compartment evaporator 45 on the back side of the freezing compartment 38 formed on the lower side. A freezer fan 47 is provided.

FIG. 15 is a refrigerant circuit diagram of the refrigerator. This refrigerant circuit includes a compressor 41 having a variable compression capacity, a condenser 42, a capillary tube 43,
Evaporator 44 for refrigerator compartment, evaporator 45 for freezer compartment
Are sequentially connected in a ring shape by the refrigerant pipe 48. Further, the air cooled by the evaporator 44 for the refrigerating compartment is supplied to the evaporator 44 for the refrigerating compartment 37.
A refrigerating compartment fan 46 having a variable rotation speed for pressure feeding to the refrigerating compartment evaporator 45 is provided side by side with the refrigerating compartment evaporator 45 to cool the air cooled by the refrigerating compartment evaporator 45.
A freezer compartment fan 47 having a variable rotation speed for pressure-feeding to No. 8 is also provided.

In the refrigerator, when the power is turned on, the compressor 41 is operated at the maximum compression capacity, and both fans 46 and 47 are operated at the maximum rotation speed. By doing so, it is possible to quickly cool the refrigerating room 37 and the freezing room 38.

[0005]

However, when the operation of the refrigerator is started as described above, it is possible to rapidly cool the refrigerating chamber 37 and the freezing chamber 38, while the heat exchange between the evaporators 44 and 45 is performed. The amount is significantly increased, and the discharge pressure of the compressor 41 is also increased accordingly. There is a problem that a large load is applied to the compressor 41 due to such a large discharge pressure, which impairs the reliability of the compressor 41.

The present invention has been made in order to solve the above-mentioned conventional problems, and it is an object of the present invention to perform a control for improving the reliability of the compressor while promptly cooling the inside of the refrigerator. It is to provide a control device for a refrigerator.

[0007]

Therefore, the control device for a refrigerator according to claim 1 has a refrigerating room and a freezing room which are insulated from each other, and additionally has a compressor, a condenser, a throttle mechanism, and a fan for the refrigerating room . an evaporator for a refrigeration chamber which is, an evaporator for the freezer compartment, which features a fan for the freezer compartment
A control device for a refrigerator having a refrigerant circuit formed by connecting the above, wherein at the start of the operation when the power of the refrigerator is turned on, the operation of the compressor and the fan for the freezer compartment of the both fans are performed.
The refrigerator compartment that has been stopped after the operation of the refrigerator is started and the predetermined reference time has elapsed from the start of the refrigerator operation.
To initiate the operation of the use fan, luck with the freezer compartment fan
The feature is that it controls to roll .

In the refrigerator controller according to the first aspect of the present invention, at the time of starting the operation of the refrigerator, only the freezing room fan of the two fans is operated until a predetermined reference time elapses after the operation of the compressor is started. I'm trying to do.
Although the internal temperature of the refrigerator is relatively high at the start of operation of the refrigerator, it is possible to suppress the heat exchange amount by operating only the freezing compartment fan of both fans.
In addition, since the temperature of the freezing room has decreased to a certain degree after the elapse of a predetermined reference time from the start of such operation, the amount of heat exchange will be large as before even if both fans are operated. It is possible to avoid.

A control device for a refrigerator according to a second aspect has a refrigerating room and a freezing room which are insulated from each other, and has a compressor having a variable compression capacity, a condenser, a throttle mechanism, and a variable rotation speed. an evaporator for refrigeration room that features a fan refrigerating chamber that is, was made in the variable rotational speed refrigeration
It is a control device for a refrigerator provided with a refrigerant circuit which is connected to an evaporator for a freezing room provided with a room fan, and when the operation of turning on the power of the refrigerator is started, a low compression capacity operation of the compressor is started. At the same time, the low rotation operation of only the freezer compartment fan of both the fans is started, and after the predetermined first reference time has elapsed from the start of the operation of the refrigerator , the low rotation operation of the refrigerating compartment fan that has been stopped is started. After that, after a predetermined second reference time has elapsed from the start of operation of the refrigerator, control is performed such that the compressor is operated at high compression capacity and both fans are operated at high rotation speed.

In the refrigerator controller according to the second aspect of the present invention, first, the compressor is operated at a low compression capacity and only the freezer compartment fan is operated at a low rotation speed from the start of the operation of the refrigerator until the first reference time elapses. There is. Although the internal temperature of the refrigerator is relatively high at the start of the operation of the refrigerator, the heat exchange amount can be suppressed by doing so. Then, both fans are operated at a low rotation speed from the lapse of the first reference time to the lapse of the second reference time. After the first reference time has elapsed since the refrigerator was started, the temperature in the freezer is low to some extent,
Even if both fans are operated together, it is possible to avoid a large heat exchange amount. Further, after the second reference time has elapsed, the compressor is operating at high compression capacity, and both fans are operating at high rotation speed. In this case, since the temperatures of both cooling chambers are sufficiently low, it is possible to reliably prevent the amount of heat exchange from increasing even if such an operation is performed.

Further, in the refrigerator control device according to the present invention, the refrigerator is provided with a compressor cooling fan, and at the time of starting the operation of the refrigerator, it is controlled to start the operation of the compressor cooling fan at the maximum number of revolutions thereof. It has a feature.

In the control device for a refrigerator according to the third aspect, the discharge pressure of the compressor can be surely reduced by ensuring the cooling of the compressor.

According to a fourth aspect of the present invention, there is provided a control device for a refrigerator, wherein the refrigerator includes temperature detecting means for detecting temperatures of a refrigerating room and a freezing room , and before the second reference time has elapsed from the start of operation of the refrigerator. When the temperature of either the refrigerating room or the freezing room reaches the specified set temperature set for each cooling room, control to stop the operation of the fan for the cooling room that has reached the set temperature. Is characterized by.

In the refrigerator control device according to the fourth aspect, the discharge pressure of the compressor can be further reduced without impeding the rapid cooling of the cooling chamber.

The refrigerator control apparatus according to claim 5, the cross-sectional together
It has a heated first cooling chamber and a second cooling chamber, and
A compressor with variable compression capability, a condenser,
Throttle mechanism and fan for the first cooling chamber whose rotation speed is variable
Evaporator for the 1st cooling chamber with the attached
A second cooling chamber air-conditioner equipped with a second cooling chamber fan
Equipped with a refrigerant circuit consisting of a vaporizer and a circular connection
A control device for a refrigerator, which is
When the low compression capacity operation of the compressor is started,
Low rotation operation of only one of the above two fans
The first reference time from the start of the refrigerator operation
Low speed of the other fan that was stopped after
After starting the operation, after the start of operation of the refrigerator,
High compression of the compressor after 2 reference time
In addition to capacity operation, both fans are operated at high speed.
The refrigerator controls the first cooling chamber and the second cooling.
Equipped with temperature detection means to detect the temperature of the room, the refrigerator operation
Before starting the second reference time from the start, the first cooling
Temperature of either chamber or second cooling chamber
When the temperature reaches the preset temperature set for
Stop the operation of the cooling room fan that has reached the constant temperature.
When the cooling chamber fan that has reached the set temperature is stopped before the second reference time elapses, the compressor is operated at high compression capacity and the other cooling chamber fan is operated. It is characterized in that the control is performed at high rotation speed.

In the control device for a refrigerator according to the fifth aspect, the temperature of the cooling chamber on the side that has not reached the set temperature can be made to reach the set temperature more rapidly.

According to another aspect of the present invention, the control device for the refrigerator is arranged so that
It has a heated refrigerator compartment and a freezer compartment, and
Fan, condenser, first throttle mechanism, and refrigerator fan
Equipped with a refrigerator evaporator and a freezer fan
Connect the evaporator for the freezing room, which is attached to the
And between the condenser and the first diaphragm mechanism.
It has a branching refrigerant branch pipe, and a second throttle mechanism is attached to this refrigerant branch pipe.
And a downstream side of this refrigerant branch pipe for the refrigerating chamber
Connect between the evaporator and freezer evaporator,
Furthermore, the distribution destination of the refrigerant flowing out from the condenser is
Switch between refrigerator compartment evaporator side and refrigerant branch side
Control of a refrigerator provided with a refrigerant circuit provided with a flow path switching means
A device for switching the flow path when starting operation of the refrigerator
By switching the means to the refrigerant branch pipe side, the low compression capacity of the compressor
Power operation is started and one of the two fans for freezer
Start low-speed operation of the fan only, and start operation of the refrigerator
After the passage of a predetermined first reference time from the
Switch the means to the refrigerator compartment evaporator side and stop
Start the low-speed operation of the refrigeration room fan that had been stopped,
After the start of operation of the rear refrigerator, the predetermined second reference time has elapsed
After that, if the compressor is operated at high compression capacity,
Both shall be controlled to operate both fans at high speed.
Is characterized by.

In the refrigerator control device according to the sixth aspect, first, the compressor is operated at a low compression capacity from the start of the operation of the refrigerator until the first reference time elapses, and only the evaporator for the freezer compartment is cooled by the refrigerant in both evaporators. , So that only the freezer fan is operated at low rotation speed. Although the internal temperature of the refrigerator is relatively high at the start of the operation of the refrigerator, the heat exchange amount can be suppressed by doing so. Then, when the first reference time elapses, the refrigerant is circulated to both evaporators, and then both fans are operated at low rotation until the second reference time elapses.
The temperature of the freezer is also low to some extent after a certain time has passed since the refrigerator was started, so avoiding excessive heat exchange even if heat is exchanged between both evaporators. It becomes possible. Further, after the second reference time has elapsed, the compressor is operating at high compression capacity, and both fans are operating at high rotation speed. In this case, since the temperatures of both chambers are sufficiently low, it is possible to reliably prevent the heat exchange amount from increasing even if such an operation is performed. In general, it is necessary to lower the temperature of the freezing compartment than the refrigerating compartment, but in the above, the freezing compartment is cooled first, so the time difference between both compartments when they reach the set temperature It is possible to make it smaller.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Next, concrete embodiments of a control device for a refrigerator according to the present invention will be described in detail with reference to the drawings.

(Embodiment 1) FIG. 4 is a longitudinal sectional view showing the internal structure of a refrigerator controlled by the control device of Embodiment 1. This refrigerator has a heat insulating partition 17 in a rectangular parallelepiped heat insulating cabinet 15, which forms a refrigerating chamber (first cooling chamber) 18 on the upper side of the heat insulating cabinet 15 and a freezing chamber (first cooling chamber) on the lower side thereof. 2 cooling chamber) 19 is formed. And, in the lower part of the rear side of the refrigerating compartment 18, a refrigerator compartment evaporator 5 provided in a refrigerant circuit to be described later,
A refrigerating compartment fan 7 is arranged to send cold air, which has been heat-exchanged by the refrigerating compartment evaporator 5, into the refrigerating compartment 18 under pressure. Further, on the back side of the freezer compartment 19, the evaporator 6 for the freezer compartment provided in the refrigerant circuit and the cold air heat-exchanged by the evaporator 6 for the freezer compartment are provided in the freezer compartment 1.
A fan 8 for the freezer compartment is arranged for pressure feeding into the inside 9.
Although not shown in the figure, a compressor 1 described later is arranged in a machine room 14 in the heat insulating cabinet 15, and a condenser 2 is provided at the bottom of the heat insulating cabinet 15.
Are arranged.

FIG. 3 is a refrigerant circuit diagram of the refrigerator.
In this refrigerant circuit, a compressor 1, a condenser 2, a capillary tube 20, a refrigerator compartment evaporator 5, and a freezer compartment evaporator 6 are sequentially connected in an annular shape by a refrigerant pipe 16. As described above, the refrigerating compartment evaporator 7 is provided with the refrigerating compartment fan 7, and the freezing compartment evaporator 6 is provided with the freezing compartment fan 8. Although not shown in the figure, the control device of this refrigerator controls the start / stop of the compressor 1, the start / stop control of the fans 7, 8. This control device is configured using, for example, a microcomputer. Further, although not shown, the refrigerating room 18 and the freezing room 19 are each provided with a temperature sensor (temperature detecting means) for detecting the internal temperature, and the detection result is input to the control device. It has become.

Next, the operation start control performed by the control device in the refrigerator will be described with reference to the flowchart of FIG. First, when the power of the refrigerator is turned on in step S1, the measurement of the elapsed time T after the power is turned on is started in subsequent step S2. Then, in step S3, the operation of the compressor 1 and the operation of the freezer compartment fan 8 are started. Then, in this state, the process waits until the elapsed time T reaches the predetermined reference time T1 in step S4. Here, the reference time T1 is about 35 minutes. When the elapsed time T reaches the reference time T1, next, in step S5, the operation of the refrigerating compartment fan 7 is started.

In step S6, it is determined whether or not the temperature in the freezer compartment 19 is below a predetermined freezer compartment set temperature tF. Here, the freezer compartment set temperature tF is about -5 ° C. When the temperature in the freezer compartment 19 is equal to or lower than the freezer compartment set temperature tF, the operation of the freezer compartment fan 8 is stopped in step S7, and in step S8 the temperature in the refrigerator compartment 18 is set to the predetermined refrigerator compartment set temperature. Wait until tR or less. Here, the refrigerating room set temperature tR is about 10 ° C.

On the other hand, if the temperature in the freezer compartment 19 is not lower than the freezer compartment set temperature tF in step S6, it is checked in step S9 whether the temperature in the refrigerator compartment 18 is lower than the refrigerator compartment set temperature tR. to decide. When the temperature in the refrigerating compartment 18 is not lower than the refrigerating compartment setting temperature tR, the process returns to step S6, but the temperature in the refrigerating compartment 18 is set to the refrigerating compartment setting temperature tR.
When it is R or less, the operation of the refrigerating compartment fan 7 is stopped in step S10, and the freezing compartment 19 is further operated in step S11.
It waits until the internal temperature becomes equal to or lower than the freezing room set temperature tF.

If the temperature in the refrigerating compartment 18 becomes equal to or lower than the refrigerating compartment set temperature tR in step S8, or if the temperature in the freezing compartment 19 becomes equal to or lower than the freezing compartment set temperature tF in step S11,
In step S12, the control mode is entered. This control mode is a mode in which start / stop control of the compressor 1 and the fans 7 and 8 is performed based on the temperature inside the refrigerator compartment 18 and the temperature inside the freezer compartment 19.

In the control device for the refrigerator, as shown in the time chart of FIG. 2, the operation of the compressor 1 and the freezer fan (F fan) are started from the start of the operation of the refrigerator until the reference time T1 elapses. I am trying to do 8 driving. Although the temperature inside the refrigerator is relatively high at the start of the operation of the refrigerator, the heat exchange amount is suppressed and the load on the compressor 1 is reduced by mainly performing heat exchange only by the freezer evaporator 6. is doing. Further, after the reference time T1 has elapsed, the temperature in the freezer compartment 19 is lowered to a certain extent, so that the heat exchange amount does not increase so much even if both fans 7 and 8 are operated, and the compressor 1 is overheated. It is possible to avoid a heavy load.
Therefore, the reliability of the compressor 1 can be improved.

In the above, the freezer compartment fan 8 is operated until the reference time T1 elapses, and the freezer compartment 19 which needs to be at a lower temperature is cooled in advance so that the entire refrigerator can be efficiently cooled. I have to. However, in order to avoid the excessive load applied at the time of startup and improve the reliability of the compressor 1, the refrigerator compartment fan 7 is operated in place of the freezer compartment fan 8 until the reference time T1 elapses. You may Further, in the refrigerant circuit shown in FIG. 3, the refrigerator compartment evaporator 5 is arranged on the upstream side of the refrigerant flow, and the freezing compartment evaporator 6 is arranged on the downstream side thereof. Can be obtained.

(Embodiment 2) The refrigerator controlled by the controller of Embodiment 2 has the same internal structure and refrigerant circuit as described above, but the compressor 1 switches between high compression operation and low compression operation. In addition, the fans 7 and 8 can switch between high rotation operation and low rotation operation. Here, as shown in the table of FIG. 7, in the high compression operation of the compressor 1, the operating frequency is about 60 to 70H.
z, and low compression operation is performed at an operating frequency of about 40 to 50 Hz. The high rotation operation of the freezer compartment fan 8 is performed at about 2400 rpm, and the low rotation operation thereof is performed at about 1200 rpm. On the other hand, the high rotation operation of the refrigerating compartment fan 7 is performed at about 2200 rpm, and the low rotation operation thereof is performed at about 1100 rpm.

Next, the operation start control performed by the control device in the refrigerator will be described with reference to the flowchart of FIG. First, when the power of the refrigerator is turned on in step S11, measurement of the elapsed time T after the power is turned on is started in step S12. And step S
At 13, the low compression operation of the compressor 1 and the low rotation operation of the freezer compartment fan 8 are started. In this state, the process waits until the elapsed time T reaches the predetermined first reference time T1 in step S14. Here, the first reference time T1
Is about 35 minutes. The elapsed time T is the first
When the reference time T1 is reached, in step S15, the low rotation operation of the refrigerating compartment fan 7 is started.

In step S16, the process waits until the elapsed time T after the power is turned on reaches the predetermined second reference time T2. Here, the second reference time T2 is about 60 minutes. When the elapsed time T reaches the second reference time T2, next, in step S17, the operation of the compressor 1 is set to the high compression operation and the operation of the refrigerating compartment fan 7 and the freezing compartment fan 8 is set to the high rotation operation.

The steps after step S18 are the same as the steps after step S6 in the first embodiment shown in FIG. That is, in step S18, it is determined whether the temperature in the freezer compartment 19 is equal to or lower than a predetermined freezer compartment set temperature tF. Here, the freezer compartment set temperature tF is about -5 ° C. When the temperature in the freezer compartment 19 is equal to or lower than the freezer compartment set temperature tF, the operation of the freezer compartment fan 8 is stopped in step S19, and in step S20, the temperature in the refrigerator compartment 18 is set to the predetermined refrigerator compartment set temperature tR. Wait until: Here, the refrigerating room set temperature tR is about 10 ° C.

On the other hand, when the temperature in the freezer compartment 19 is not lower than the freezer compartment set temperature tF in step S18, the temperature in the refrigerator compartment 18 is set in step S21.
It is determined whether or not R or less. When the temperature in the refrigerating compartment 18 is not lower than the refrigerating compartment set temperature tR, the process returns to the step S18 again, but when the temperature in the refrigerating compartment 18 is lower than the refrigerating compartment set temperature tR, in step S22 The operation of the fan 7 is stopped, and the process waits until the temperature in the freezer compartment 19 becomes equal to or lower than the freezer compartment set temperature tF in step S23.

In step S20, the temperature in the refrigerating compartment 18 becomes equal to or lower than a predetermined refrigerating compartment set temperature tR, or in step S20.
When the temperature in the freezer compartment 19 becomes equal to or lower than the freezer compartment set temperature tF in 23, the process proceeds to step S24 and shifts to the control mode. This control mode is a mode in which compression capacity control and start / stop control of the compressor 1 and start / stop control and rotation speed control of both fans 7 and 8 are performed based on the temperature inside the refrigerating compartment 18 and the temperature inside the freezing compartment 19. Is.

In the control device for the refrigerator, as shown in the time chart of FIG. 6, the low compression operation of the compressor 1 and the freezer compartment fan are started from the start of the operation of the refrigerator until the first reference time T1 elapses. (F fan) 8 is operated at a low rotation speed. Although the internal temperature of the refrigerator is relatively high at the start of the operation of the refrigerator, the amount of heat exchange in the refrigerant circuit can be improved by gradually performing heat exchange mainly by the freezer evaporator 6 by the above operation. The load of the compressor 1 is surely reduced by suppressing it. Further, after the first reference time T1 has elapsed, the temperature in the freezer compartment 19 is lowered to a certain extent, so even if both fans 7 and 8 are operated at low speed, the heat exchange amount does not increase so much. It is possible to avoid applying an excessive load to the compressor 1. Further, after the second reference time T2 has elapsed, both the temperature inside the freezing compartment 19 and the temperature inside the refrigerating compartment 18 are sufficiently low, so the compressor 1 is set to high compression operation, and both fans 7 and 8 are set to high. Even if rapid cooling is achieved as the rotation operation, it is possible to avoid applying an excessive load to the compressor 1. Therefore, the compressor 1 can be cooled while the refrigerating room 18 and the freezing room 19 are rapidly cooled.
The reliability of can be improved.

In the above, the freezer compartment fan 8 is operated until the first reference time T1 elapses, and the freezer compartment 19 which needs to be at a lower temperature is cooled in advance to efficiently cool the entire refrigerator. I can do it. However, in order to obtain the above-described effect of improving the reliability of the compressor 1 by avoiding an excessive load applied at the time of startup, the first reference time T1 is used instead of the freezer compartment fan 8.
The refrigerating room fan 7 may be operated until the time elapses. Further, in the refrigerant circuit shown in FIG. 3, the refrigerator compartment evaporator 5 is arranged on the upstream side of the refrigerant flow, and the freezing compartment evaporator 6 is arranged on the downstream side thereof. Can be obtained.

(Embodiment 3) In addition to the refrigerator of Embodiment 2, the refrigerator controlled by the control device of Embodiment 3 includes a machine room fan 12 for cooling the compressor 1 and a machine room 14 in a heat insulating cabinet 15. Be prepared for. The machine room fan 12 can also switch between high rotation operation and low rotation operation. Here, as shown in the table of FIG. 7, the high rotation operation of the machine room fan 12 is performed at about 3000 rpm, and the low rotation operation thereof is performed at about 2000 rpm.

Next, the operation start control performed by the control device in the refrigerator will be described with reference to the flowchart of FIG. However, the difference between this control and the control of the second embodiment is that after turning on the power of the refrigerator, the compressor 1
The low compression operation of the machine room fan 1 and
It is only the point where the high rotation operation of No. 2 is started.

First, in step S31, the power of the refrigerator is turned on.
Then, in the subsequent step S32, the measurement of the elapsed time T after the power is turned on is started. Then, in step S33, the low compression operation of the compressor 1 and the low rotation operation of the freezer compartment fan 8 are started, and the high rotation operation of the machine room fan 12 is started. In this state, the process waits until the elapsed time T reaches the predetermined first reference time T1 in step S34. Here, the first reference time T1
Is about 35 minutes. The elapsed time T is the first
When the reference time T1 is reached, next, in step S35, the low rotation operation of the refrigerating compartment fan 7 is started.

In step S36, the process waits until the elapsed time T after the power is turned on reaches the predetermined second reference time T2. Here, the second reference time T2 is about 60 minutes. When the elapsed time T reaches the second reference time T2, next, in step S37, the operation of the compressor 1 is set to the high compression operation and the operation of the refrigerating compartment fan 7 and the freezing compartment fan 8 is set to the high rotation operation.

The steps after step S38 are the same as the steps after step S6 of the first embodiment shown in FIG. That is, in step S38, it is determined whether the temperature in the freezer compartment 19 is equal to or lower than a predetermined freezer compartment set temperature tF. Here, the freezer compartment set temperature tF is about -5 ° C. When the temperature in the freezer compartment 19 is equal to or lower than the freezer compartment set temperature tF, the operation of the freezer compartment fan 8 is stopped in step S19, and in step S20, the temperature in the refrigerator compartment 18 is set to the predetermined refrigerator compartment set temperature tR. Wait until: Here, the refrigerating room set temperature tR is about 10 ° C.

On the other hand, when the temperature in the freezer compartment 19 is not lower than the freezer compartment set temperature tF in step S38, the temperature in the refrigerator compartment 18 is set in step S41.
It is determined whether or not R or less. When the temperature in the refrigerating compartment 18 is not lower than the refrigerating compartment set temperature tR, the process returns to the step S38 again, but when the temperature in the refrigerating compartment 18 is lower than the refrigerating compartment set temperature tR, in step S42 The operation of the fan 7 is stopped, and the process waits until the temperature in the freezer compartment 19 becomes the freezer compartment set temperature tF or less in step S43.

In step S40, the temperature in the refrigerating compartment 18 becomes equal to or lower than a predetermined refrigerating compartment set temperature tR, or in step S40.
When the temperature in the freezer compartment 19 becomes equal to or lower than the freezer compartment set temperature tF in 43, the process proceeds to step S44 and shifts to the control mode. This control mode is a mode in which compression capacity control and start / stop control of the compressor 1 and start / stop control and rotation speed control of both fans 7 and 8 are performed based on the temperature inside the refrigerating compartment 18 and the temperature inside the freezing compartment 19. Is.

In the control device for performing the above-described control, in addition to the effects of the second embodiment, the machine room fan 1
By ensuring the cooling of the compressor 1 by the operation of 2, the discharge pressure of the compressor 1 can be surely reduced. Therefore, the refrigerator compartment 18 and the freezer compartment 19
It is possible to reliably improve the reliability of the compressor 1 while achieving rapid cooling of the compressor.

In the above, the freezer compartment fan 8 is operated until the first reference time T1 elapses, and the freezer compartment 19 which needs to be at a lower temperature is cooled in advance to efficiently cool the entire refrigerator. I can do it. However, in order to avoid the excessive load at the time of startup and improve the reliability of the compressor 1, the refrigerating compartment fan 7 may be operated until the first reference time T1 elapses. This is the same as the case of the second embodiment.

(Embodiment 4) Next, operation start control performed by the control device in the refrigerator of Embodiment 4 will be described with reference to the flowchart of FIG. First, when the power of the refrigerator is turned on in step S51, measurement of the elapsed time T after the power is turned on is started in subsequent step S52. Then, in step S53, the low compression operation of the compressor 1 and the low rotation operation of the freezer compartment fan 8 are started. Then, in this state, the process waits until the elapsed time T reaches the predetermined first reference time T1 in step S54. Here, the first reference time T1 is about 35 minutes.
When the elapsed time T reaches the first reference time T1, next, in step S55, the low rotation operation of the refrigerating compartment fan 7 is started.

In step S56, it is determined whether or not the temperature in the freezer compartment 19 is below a predetermined freezer compartment set temperature tF. Here, the freezer compartment set temperature tF is about -5 ° C. When the temperature in the freezer compartment 19 is equal to or lower than the freezer compartment set temperature tF, the operation of the freezer compartment fan 8 is stopped in step S57, and in step S58, the temperature in the refrigerator compartment 18 is set to the predetermined refrigerator compartment set temperature tR. Wait until: Here, the refrigerating room set temperature tR is about 10 ° C. When the temperature in the refrigerating compartment 18 becomes equal to or lower than the predetermined refrigerating compartment set temperature tR, the control mode is entered in step S70. This control mode is a mode in which compression capacity control and start / stop control of the compressor 1 and start / stop control and rotation speed control of both fans 7 and 8 are performed based on the temperature inside the refrigerating compartment 18 and the temperature inside the freezing compartment 19. Is.

On the other hand, when the temperature in the freezer compartment 19 is not lower than the freezer compartment set temperature tF in step S56, the temperature in the refrigerator compartment 18 is set in step S59.
It is determined whether or not R or less. When the temperature in the refrigerating compartment 18 is equal to or lower than the refrigerating compartment set temperature tR, step S60.
Then, the operation of the refrigerating room fan 7 is stopped, and then step S
At 61, the temperature in the freezer compartment 19 is the predetermined freezer compartment set temperature tF.
Wait until: When the temperature in the freezer compartment 19 becomes equal to or lower than the preset refrigerating compartment set temperature tF, step S7.
When 0, the control mode is entered.

Further, when the temperature in the refrigerating compartment 18 is not lower than the refrigerating compartment set temperature tR in the step S59, it is determined whether or not the elapsed time T after the power is turned on becomes the predetermined second reference time T2. It is determined in step S62. When the elapsed time has not reached the second reference time T2 yet, the process returns to step S56 while the elapsed time is the second reference time T2.
When the reference time T2 is reached, the process proceeds to step S63. Here, the second reference time T2 is about 60 minutes. Then, in step S63, the operation of the compressor 1 is set to the high compression operation, and the operations of the refrigerating compartment fan 7 and the freezing compartment fan 8 are set to the high rotation operation.

The steps after step S64 are the same as the steps after step S6 of the first embodiment shown in FIG. That is, in step S64, it is determined whether the temperature in the refrigerating compartment 18 is equal to or lower than the refrigerating compartment set temperature tR. When the temperature in the refrigerating compartment 18 is equal to or lower than the refrigerating compartment set temperature tR, step S
At 65, the operation of the refrigerating compartment fan 7 is stopped, and at step S66, the operation waits until the temperature inside the freezing compartment 19 becomes equal to or lower than the freezing compartment set temperature tF.

On the other hand, when the temperature in the refrigerating compartment 18 is not lower than the refrigerating compartment setting temperature tR in step S64, the process proceeds to step S67, and the temperature in the freezing compartment 19 is lower than the predetermined freezing compartment setting temperature tF. Or not. When the temperature in the freezer compartment 19 is below the freezer compartment set temperature tF, the operation of the freezer compartment fan 8 is stopped in step S68,
Further, in step S69, the process waits until the temperature in the refrigerating compartment 18 becomes equal to or lower than the predetermined refrigerating compartment set temperature tR. Then, in step S69, the temperature in the refrigerating compartment 18 becomes equal to or lower than the predetermined refrigerating compartment set temperature tR, or in step S66, the freezing compartment 19 is reached.
If the internal temperature becomes equal to or lower than the freezer compartment set temperature tF, the process proceeds to step S71 and shifts to the control mode.

In the control device for the refrigerator, as shown in the time chart of FIG. 10, the low compression operation of the compressor 1 and the fan for the freezer are performed until the first reference time T1 elapses from the start of the operation of the refrigerator. (F fan) 8 is operated at a low rotation speed. Although the internal temperature of the refrigerator is relatively high at the start of the operation of the refrigerator, the heat exchange amount is suppressed mainly by gradually performing heat exchange only by the freezer compartment evaporator 6 by the above operation. It surely reduces the load of 1. Further, after the first reference time T1 has elapsed, the temperature in the freezer compartment 19 is lowered to a certain extent, so even if both fans 7 and 8 are operated at low speed, the heat exchange amount does not increase so much. It is possible to avoid applying an excessive load to the compressor 1. If the temperature in the freezer compartment 19 becomes equal to or lower than the freezer compartment set temperature tF before the second reference time T2 elapses after continuing such operation, the operation of the freezer compartment fan 8 is stopped. . By doing so, the discharge pressure of the compressor 1 can be further lowered thereafter, and its reliability can be further improved. This is the same when the temperature inside the refrigerating compartment 18 becomes equal to or lower than the refrigerating compartment set temperature tR and the operation of the refrigerating compartment fan 7 is stopped. After the second reference time T2 has elapsed, even if the set temperature t
Even if R and tF are not reached, the temperatures of both chambers 18 and 19 are sufficiently low. Therefore, even if the compressor 1 is operated at high compression and both fans 7 and 8 are operated at high speed for quick cooling, it is possible to avoid applying an excessive load to the compressor 1. Therefore, the reliability of the compressor 1 can be improved while quickly cooling the refrigerating chamber 18 and the freezing chamber 19.

By the way, in the above, when the temperature in the freezer compartment 19 becomes equal to or lower than the freezer compartment set temperature tF before the second reference time T2 elapses, the operation of the freezer compartment fan 8 is stopped while the refrigerating compartment 8 is refrigerated. The low rotation operation of the room fan 7 is continued as it is. In such a case, the operation of the freezer compartment fan 8 may be stopped and the refrigerating compartment fan 7 may be operated at high rotation speed. Since the evaporator 6 for the freezer compartment hardly exchanges heat, the compressor 1 is not overloaded even if the fan 7 for the refrigerator compartment is operated at high speed, and the reliability of the compressor 1 is improved while the refrigerator compartment 18 Can be quickly cooled. This is the same when the refrigerating compartment fan 7 is stopped in step S49, and at this time, the freezing compartment fan 8 may be set to a high rotation operation.

(Embodiment 5) The internal structure of the refrigerator controlled by the controller of Embodiment 5 is the same as the internal structure of the refrigerator of Embodiment 1 shown in FIG. However, the two have different refrigerant circuits. FIG. 11 is a refrigerant circuit diagram of the refrigerator of this embodiment, and FIG. 12 is a view showing this refrigerant circuit together with the arrangement state of each device. As shown in both figures, on the discharge side of the compressor 1, there are a condenser 2 and a dew-proof pipe 1.
0, a dryer 9 and a three-way valve (flow path switching means) 11 are sequentially connected by a refrigerant pipe 16. A capillary tube 3 for the refrigerating compartment 18 and an evaporator 5 for the refrigerating compartment 18 are sequentially connected to one outlet side of the three-way valve 11. Further, a refrigerant branch pipe 20 in which a capillary tube 4 for the freezer compartment 19 is provided is connected to the other outlet side of the three-way valve 11. The outlet side of the refrigerator compartment evaporator 5 is connected to the inlet side of the freezer compartment evaporator 6, and the outlet side of the refrigerant branch pipe 20 is connected between the refrigerator compartment evaporator 5 and the freezer compartment evaporator 6. Further, the outlet side of the freezer compartment evaporator 6 is connected to the suction side of the compressor 1 by a suction pipe 13.

Further, as shown in FIG. 12, the compressor 1 is arranged in a machine room 14 provided in a heat insulating cabinet 15 of a refrigerator, and the condenser 2 is arranged at the bottom of the heat insulating cabinet 15. Then, the refrigerator evaporator 5 is provided on the upper back surface of the heat insulating cabinet 15.
Is arranged, and the evaporator 6 for the freezer compartment is located below this.
Are arranged. Further, the dew-proof pipe 10 is extended to the front side of the heat insulating cabinet 15. Although not shown in the figure, the compressor 1
There is provided a control device that controls the start / stop control of the compressor, the compression capacity control, the switching control of the three-way valve 11, the start / stop control of the fans 7 and 8, the rotation speed control, and the like. This control device is configured using, for example, a microcomputer. The compressor 1 can perform high compression operation and low compression operation by switching, and the fans 7 and 8 can perform high rotation operation and low rotation operation by switching. Here, as shown in the table of FIG. 7, the high compression operation of the compressor 1 is performed at an operating frequency of about 60 to 70 Hz, and the low compression operation is performed at an operating frequency of about 40 to 5 Hz.
It is done at 0 Hz. The high rotation operation of the freezer compartment fan 8 is performed at about 2400 rpm,
The low speed operation is performed at about 1200 rpm. On the other hand, the high-speed operation of the cold room fan 7 is about 2200.
It is done at rpm, and the low speed operation is about 11
It is done at 00 rpm.

Next, the operation start control performed by the controller in the refrigerator will be described with reference to the flowchart of FIG. First, when the power of the refrigerator is turned on in step S81, measurement of the elapsed time T after the power is turned on is started in step S82. Then, in step S83, the three-way valve 11 is moved to the side of the broken line shown in FIG.
0 side) F, and then in step S84, the low compression operation of the compressor 1 and the low rotation operation of the freezer compartment fan 8 are started. In this state, the process waits until the elapsed time T reaches the predetermined first reference time T1 in step S85. Here, the first reference time T1 is about 35 minutes. When the elapsed time T reaches the first reference time T1, next, in step S86, the three-way valve 11 is switched to the solid line side (refrigerating room evaporator 5 side) R and the low rotation operation of the refrigerating room fan 7 is started. .

In step S87, the process waits until the elapsed time T after the power is turned on reaches the predetermined second reference time T2. Here, the second reference time T2 is about 60 minutes. When the elapsed time T reaches the second reference time T2, next, in step S88, the operation of the compressor 1 is set to high compression operation, and the operations of the refrigerating compartment fan 7 and the freezing compartment fan 8 are set to high rotation operation.

In step S89, it is determined whether or not the temperature in the freezer compartment 19 is below a predetermined freezer compartment set temperature tF. Here, the freezer compartment set temperature tF is about -5 ° C. When the temperature in the freezer compartment 19 is equal to or lower than the freezer compartment set temperature tF, the operation of the freezer compartment fan 8 is stopped in step S90, and in step S81 the temperature in the refrigerator compartment 18 is set to the predetermined refrigerator compartment set temperature tR. Wait until: Here, the refrigerating room set temperature tR is about 10 ° C.

On the other hand, if the temperature in the freezer compartment 19 is not lower than the freezer compartment set temperature tF in step S89, the temperature in the refrigerator compartment 18 is set in step S92.
It is determined whether or not R or less. When the temperature in the refrigerating compartment 18 is not lower than the refrigerating compartment set temperature tR, the process returns to the step S89 again, but when the temperature in the refrigerating compartment 18 is lower than the refrigerating compartment set temperature tR, the refrigerating compartment is used in step S93. The operation of the fan 7 is stopped, and the process waits until the temperature in the freezer compartment 19 becomes the freezer compartment set temperature tF or lower in step S94.

In step S91, the temperature in the refrigerating compartment 18 becomes equal to or lower than the predetermined refrigerating compartment set temperature tR, or in step S91.
When the temperature in the freezer compartment 19 becomes equal to or lower than the freezer compartment set temperature tF in 94, the process proceeds to step S95 and shifts to the control mode or the time share mode. This control mode is based on the temperature in the refrigerator compartment 18 and the temperature in the freezer compartment 19 to control the compression capacity of the compressor 1 and start / stop control.
In addition, it is a mode in which start / stop control and rotation speed control of both fans 7, 8 are performed. In the time share mode, the compressor 1 is operated based on the temperature inside the refrigerator compartment 18 and the temperature inside the freezer compartment 19.
In addition to performing compression capacity control and start / stop control of each fan, start / stop control of both fans 7 and 8 and rotation speed control, the three-way valve 11 is switched at predetermined time intervals so that the solid line side R and the broken line side F in FIG. In this control, the refrigerant is alternately circulated, and the refrigerator compartment fan 7 is operated when switched to the solid line side R, while the freezer compartment fan 8 is operated when switched to the broken line side F.

In the control device for the refrigerator, it is 2 from the start of the operation of the refrigerator to the elapse of the first reference time T1.
Freezer evaporator 6 out of the two evaporators 5 and 6
Refrigerant is circulated only through the compressor so that the compressor 1 performs a low compression operation and the freezer compartment fan 8 operates at a low rotation speed. Although the internal temperature of the refrigerator is relatively high at the start of the operation of the refrigerator, heat is gradually exchanged only by the freezer evaporator 6 by the above operation, so the heat exchange amount in the refrigerant circuit is suppressed and the compressor 1 The load of is surely reduced. Further, after the first reference time T1 has elapsed, the temperature inside the freezer compartment 19 is lowered to a certain extent, so that even if both the fans 7 and 8 are operated at a low rotation speed by causing the refrigerant to flow through the evaporators 5 and 6. The heat exchange amount does not become so large, and it is possible to avoid applying an excessive load to the compressor 1. Further, after the second reference time T2 has elapsed, both the temperature inside the freezing compartment 19 and the temperature inside the refrigerating compartment 18 are sufficiently low, so the compressor 1 is set to high compression operation, and both fans 7 and 8 are set to high. Even if the inside of the refrigerator is quickly cooled as the rotation operation, it is possible to prevent the compressor 1 from being overloaded. Therefore, the reliability of the compressor 1 can be improved while quickly cooling the refrigerating chamber 18 and the freezing chamber 19.

Further, the control device controls so that the three-way valve 11 is not switched at the start of operation when the discharge pressure of the compressor 1 is considered to be relatively high. Therefore, the withstand pressure standard to be satisfied by the three-way valve 11 is lowered, and thereby the three-way valve 11 can be downsized and the cost can be reduced. Here, instead of the three-way valve 11, for example, two on-off valves may be used to switch the refrigerant flow path between the solid line side R and the broken line side F. However, the effect of performing the control in which the flow path switching valve is not operated at the start of operation is more remarkable when the one-way valve that switches the flow path is used, such as the three-way valve 11. . Further, in the above, the three-way valve 11 is connected to the broken line side F from the start of operation until the first reference time elapses.
1 may be connected to the solid line side R in order to lower the withstand voltage standard to be satisfied. Anyway, if the control is such that the three-way valve 11 is not switched at the start of operation when it is considered that the discharge pressure of the compressor 1 is relatively high, the pressure resistance standard that the three-way valve 11 should satisfy is lowered, and the three-way valve 11 is controlled. It is possible to achieve downsizing and cost reduction.

The specific embodiments of the present invention have been described above with reference to the first to fifth embodiments. However, the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the present invention. It can be carried out. In the above, the capillary tube constitutes the throttling mechanism in the refrigerant circuit,
This may be configured using, for example, an expansion valve having an orifice.

[0063]

According to the refrigerator controller of the first aspect,
It is possible to suppress the amount of heat exchange in the refrigerant circuit at the start of operation of the refrigerator. Therefore, it is possible to prevent the discharge pressure of the compressor from becoming high and to apply an excessive load to this compressor, and it is possible to improve its reliability.

In the refrigerator control device according to the second aspect of the present invention, the compressor is operated at a high compression capacity and both fans are operated at a high rotation speed while avoiding an increase in the amount of heat exchange.
Therefore, it is possible to quickly cool both cooling chambers while improving the reliability of the compressor.

Further, in the control device for the refrigerator according to claim 3,
By ensuring the cooling of the compressor, it is possible to reliably reduce the discharge pressure of the compressor and further improve its reliability.

In the control device for a refrigerator according to claim 4, the discharge pressure of the compressor can be further reduced without impeding the rapid cooling of the cooling chamber, and the reliability thereof can be further improved.

In the refrigerator control device according to the fifth aspect of the present invention, the heat exchange amount can be increased without increasing the discharge pressure of the compressor. Therefore, the cooling chamber can be cooled more rapidly while maintaining good reliability of the compressor. Is possible.

In the control device for a refrigerator according to the sixth aspect, it is possible to improve the reliability of the compressor while avoiding an excessive load on the compressor while achieving rapid cooling of the cooling chamber. Further, since the withstand pressure standard to be satisfied by the flow path switching means is lowered, it is possible to reduce the size and cost of the flow path switching means.

[Brief description of drawings]

FIG. 1 is a flowchart showing control in a first embodiment of a control device for a refrigerator according to the present invention.

FIG. 2 is a time chart showing control in the first embodiment.

FIG. 3 is a refrigerant circuit diagram included in the refrigerator in the first embodiment.

FIG. 4 is a vertical cross-sectional view showing the internal configuration of the refrigerator in the first embodiment.

FIG. 5 is a flowchart showing control in the second embodiment.

FIG. 6 is a time chart showing control in the second embodiment.

FIG. 7 is a specification table of each device provided in the refrigerator.

FIG. 8 is a flowchart showing control in the third embodiment.

FIG. 9 is a flowchart showing control in the fourth embodiment.

FIG. 10 is a time chart showing control in the fourth embodiment.

FIG. 11 is a refrigerant circuit diagram included in the refrigerator in the fifth embodiment.

FIG. 12 is a perspective view showing a refrigerant circuit included in a refrigerator according to a fifth embodiment together with arrangements of respective devices.

FIG. 13 is a flowchart showing control in the fifth embodiment.

FIG. 14 is a transparent perspective view showing a schematic configuration of a refrigerator in a conventional example.

FIG. 15 is a refrigerant circuit diagram provided in a refrigerator in a conventional example.

[Explanation of symbols]

1 compressor 2 capacitors 3 Capillary tubes for cold rooms 4 Capillary tube for freezer 5 Evaporator for cold room 6 Evaporator for freezer 7 Cooling room fan 8 Freezer fan 11 three-way valve 12 Machine room fan 18 Refrigerator 19 Freezer 20 Refrigerant branch pipe

Continuation of the front page (56) Reference JP-A-5-240557 (JP, A) JP-A-62-10572 (JP, A) JP-A-7-260313 (JP, A) JP-A-9-509732 (JP , A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F25D 11/02

Claims (6)

(57) [Claims] With claim 1, having a thermally insulated refrigerating compartment and the freezing compartment with each other, compressor and, a capacitor and a diaphragm mechanism, and features an evaporator for refrigeration room that features a fan refrigerating compartment, a fan for the freezer compartment refrigeration With a room evaporator
A control device for a refrigerator having a refrigerant circuit formed by connecting the above, wherein when the refrigerator is powered on, the operation of the compressor and only one of the fans for the freezer compartment is performed. started operation, the subsequent predetermined reference time from the time of refrigerator operation start has elapsed, by starting the operation of the fan <br/> down chillers which has stopped, a control for operating with the freezer compartment fan A control device for a refrigerator characterized by performing the following. With wherein having insulated refrigerating compartment and the freezing compartment with each other, a compressor has been made to the compression capacity variable capacitor and a diaphragm mechanism and, for been made to variable rotational speed refrigerating compartment <br/> a refrigerator controller having a refrigerating chamber evaporator that features a fan, a refrigerant circuit formed by connecting the freezer compartment evaporator which features a fan refrigeration compartment has been made in variable rotational speed, the refrigerator power When the operation is started, the low compression capacity operation of the compressor is started, and the low rotation operation of only the freezer compartment fan of the two fans is started, and the predetermined first reference time is elapsed from the start of the operation of the refrigerator. after a lapse starts low speed operation of the refrigerating compartment fan had stopped, after the elapse of subsequent second reference time from the time of refrigerator operation start of predetermined, the compressor and operating high compression capability Refrigerator control unit and performs Rutotomoni said control both fan and high speed operation. 3. The refrigerator according to claim 2, wherein the refrigerator is provided with a compressor cooling fan, and when the operation of the refrigerator is started, control for starting the operation of the compressor cooling fan is performed at the maximum rotation speed. Control device. Wherein said refrigerator is provided with a temperature detecting means for detecting a temperature of the refrigerating compartment and the freezing compartment, before the elapse of the second reference time from the time of refrigerator operation start, one of the refrigerating compartment or the freezer compartment 3. When the temperature reaches the predetermined set temperature set for each cooling chamber, the control for stopping the operation of the cooling chamber fan that has reached the set temperature is performed. Refrigerator controller. 5. A first cooling chamber and a second cooling chamber which are insulated from each other.
And has a compression capability that is variable.
It has a variable speed, a condenser, a diaphragm mechanism, and a variable speed.
Evaporator for the first cooling chamber with a fan for the first cooling chamber
And a second cooling chamber fan with variable rotation speed
Connect the second cooling chamber evaporator that was installed to the annular one by one.
A control device for a refrigerator having a refrigerant circuit comprising:
One of the two fans is started when power operation is started.
Start low-speed operation for only one side, and
Was stopped after a predetermined first reference time from
Start the low-speed operation of the other fan, and then operate the refrigerator.
After a predetermined second reference time has elapsed from the start of the transfer,
While operating the compressor with high compression capacity,
The refrigerator detects the temperatures of the first cooling chamber and the second cooling chamber by controlling the fan to operate at high speed.
Equipped with a temperature detecting means for
Before the second reference time elapses, the first cooling chamber or the second cooling
The temperature of one of the chambers is set for each cooling chamber.
When the set temperature is reached, the set temperature is reached.
When the control for stopping the operation of the cooling chamber fan is performed and the operation of the cooling chamber fan that has reached the set temperature before the second reference time elapses is stopped, the compressor is highly compressed. A control device for a refrigerator, which performs a capacity operation and performs a control for causing the other cooling chamber fan to operate at a high rotation speed. 6. A refrigerating room evaporator, which has a refrigerating room and a freezing room, which are insulated from each other, a compressor, a condenser, a first throttling mechanism, a refrigerating room fan, and a freezing room fan. And a refrigerant branch pipe branching from between the condenser and the first throttle mechanism. The refrigerant branch pipe is provided with the second throttle mechanism and the refrigerant branch pipe is connected to the freezer compartment evaporator. The downstream side is connected between the refrigerator compartment evaporator and the freezer compartment evaporator, and the flow destination switching means for switching the distribution destination of the refrigerant flowing out from the condenser between the refrigerator compartment evaporator side and the refrigerant branch pipe side. A control device for a refrigerator having a refrigerant circuit provided with, wherein when the operation of the refrigerator is started, the flow path switching means is switched to the refrigerant branch pipe side to reduce the low pressure of the compressor. At the same time as the reduction capacity operation is started, the low rotation operation of only the freezer compartment fan of the both fans is started, and the predetermined first
After the reference time has elapsed, the flow passage switching means is switched to the refrigerator compartment evaporator side and the low rotation operation of the refrigerating compartment fan that has been stopped is started, and then a predetermined second reference time is elapsed from the start of operation of the refrigerator. After the lapse of time, the control device for the refrigerator is characterized in that the compressor is controlled to operate at high compression capacity and the fans are controlled to operate at high rotation speed.