JPH06159891A - Control device for refrigerator - Google Patents

Abstract

PURPOSE:To perform a proper flowing of refrigerant of high temperature in a heat radiation pipe and to prevent a dew formation of an outer case without stopping an operation of a compressor for a long period of time after a forced continuous rapid cooling operation is carried out. CONSTITUTION:There is provided a refrigerator temperature sensing means 5 for sensing a temperature within the refrigerator. After a rapid cooling switch 6 is turned on, a compressor 2 is forcedly and continuously operated for a predetermined period of time, thereafter the compressor 2 is stopped, a refrigerator temperature sensing means 5 detects a predetermined temperature set to be lower than a set temperature for controlling temperature in a normal state or a predetermined increasing in temperature is detected after completion of the rapid cooling operation and again the compressor 2 is forcedly operated continuously for a predetermined period of time and then the operation is returned back to its normal temperature adjusting control.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator controller for preventing dew condensation on an outer box after rapid cooling by forced continuous operation.

[0002]

2. Description of the Related Art In a refrigerator control device, the compressor is forcibly operated continuously for a certain period of time to rapidly freeze frozen foods to improve the freshness of the foods (for example, JP-A-58-58). 6383).

The conventional cooling control device for a refrigerator will be described below with reference to the drawings.

FIG. 11 shows a block diagram of a conventional refrigerator control device. In the refrigerator main body 1, a compressor 2 that circulates a refrigerant, a condenser 4 that is embedded in an outer box 3, an in-compartment temperature detection unit 5 that detects an in-compartment temperature θ1, and a forced operation of the compressor 2 are continuously operated. A quick cooling switch 6 is provided.

Further, the control device 7 of the refrigerator determines whether the temperature detected by the in-compartment temperature detecting means 5 is within a set temperature range (set temperature θA to set temperature θB) inside the refrigerator. Means 8, first time integrating means 9 for integrating a predetermined time TA for forcibly operating the compressor 2 continuously with the output of the rapid cooling switch 6, in-compartment temperature determining means 8 and first time integrating means 9 And a compressor control means 10 for controlling the operation of the compressor 2 by the output of the above.

The operation of the refrigerator control device configured as described above will be described below with reference to FIGS. 11, 12, and 13.

FIG. 12 is a flow chart for explaining a temperature control control and a rapid cooling control for adjusting a conventional refrigerator internal temperature, and FIG. 13 is a temperature characteristic diagram and a time chart of the refrigerator internal temperature. is there. First, quick cooling switch 6
It is determined whether or not is input (Step 1). In the normal case where the quick cooling switch 6 is not turned on, determination is made until the inside temperature θ1 detected by the inside temperature detecting means 5 becomes higher than the set temperature θA (Step 2), and the inside temperature θ1 becomes higher than the set temperature θA. If so, turn on the compressor 2 (S
step3).

Next, it is judged until the internal temperature θ1 becomes lower than the set temperature θB (Step 4), and if it becomes lower, the compressor 2 is turned off (Step 5) and output from the compressor control means 10. That is, the operation of the compressor 2 is controlled to keep the internal temperature θ1 within the set temperature range from the set temperature θA to the set temperature θB. Due to the operation of the compressor 2, the air in the refrigerator is absorbed and cooled, and this heat is transferred to the condenser 4
Radiates heat to the outside of the cabinet.

Next, when the quick cooling switch 6 is turned on, the compressor 2 is turned on (Step 6), the first time integrating means 9 is started (Step 7), and the integrated time T1 becomes the predetermined time TA. Up to (Step 8). When the integrated time T1 reaches the predetermined time TA, the compressor 2 is turned off.
It is output from the compressor control means 10 so as to allow it (Step 5). As described above, the compressor 2 was forcibly operated by continuous TA for a predetermined time for rapid cooling.

[0010]

However, in the above configuration, when the compressor 2 is continuously operated for rapid cooling, the internal chamber temperature θ1 becomes lower than usual, and when the normal control is resumed thereafter, the compressor 2 2, the stop time becomes longer. Therefore, as shown in FIG. 11, the high-temperature refrigerant does not flow for a long time in the heat radiating pipe 11 forming a part of the condenser 4 embedded in the flange portion 3a of the outer casing 3 for preventing dew condensation, and thus the outer casing 3 Had a drawback that it was cooled by the leakage of cold air in the refrigerator, resulting in dew condensation.

Further, when the outside air temperature is low, the temperature inside the refrigerator is further lowered, and since the temperature inside the refrigerator is moderately increased even after the compressor is stopped, the compressor 2 is stopped for a long time and the humidity is low. The outer case 3 also had dew condensation. On the other hand, when the outside air temperature where dew condensation is likely to occur is high, the stop time of the compressor 2 after the rapid cooling operation is slightly longer than that of the normal temperature control,
The outer box 3 sometimes had dew condensation.

The present invention solves the above problems, and an object of the present invention is to provide a control device for a refrigerator capable of preventing dew condensation on the outer box, which tends to occur after the end of continuous operation.

[0013]

In order to achieve the above object, a control device for a refrigerator according to the present invention comprises a compressor that circulates a refrigerant, a condenser embedded in an outer box, and a refrigerator for detecting the temperature inside the refrigerator. Internal temperature detection means, internal temperature determination means for determining whether the temperature detected by the internal temperature detection means is within a set temperature range in the internal storage, and rapid cooling for forcibly operating the compressor continuously. A switch, a first time accumulating means for accumulating the continuous operation time, and a compressor after the internal temperature detecting means detects a predetermined temperature set lower than the set temperature after the continuous operation of the rapid cooling is completed. The second time integration means for forcibly integrating a predetermined time for continuous operation and the compressor control means for controlling the operation of the compressor.

In this case, it is preferable to set a plurality of predetermined temperatures at which the compressor is forcibly and continuously operated after the end of the rapid cooling continuous operation.

Further, an outside air temperature detecting means for detecting the outside air temperature outside the refrigerator may be provided, and when the outside air temperature is high, the predetermined time accumulated by the second time integrating means may be set longer.

Further, it is possible to forcibly continue the operation of the compressor for a predetermined period of time after the internal temperature has risen by a predetermined temperature after the end of the rapid cooling continuous operation.

[0017]

In the control device of the refrigerator of the present invention, after the compressor is forcibly continuously operated for a predetermined time after the rapid cooling switch is turned on, the compressor is stopped and the internal temperature detection means sets the normal temperature control. After detecting a predetermined temperature set lower than the temperature, the compressor is forced again to continuously operate for a predetermined time, and the normal temperature control is resumed. Therefore, the compressor does not stop for a long time after the rapid cooling operation, and it is possible to prevent dew condensation on the outer case due to the high temperature refrigerant not flowing through the heat radiating pipe for a long time.

Further, in the refrigerator control device of the present invention, when the outside air temperature is low, the temperature inside the refrigerator becomes lower, and the temperature inside the refrigerator rises slowly even after the compressor is stopped. After the end, it is possible to increase the frequency of forced operation of the compressor by setting the predetermined temperature at which the compressor is forcibly continuously operated again in multiple stages, and to return to the normal temperature control in a short period of time.

Further, in the refrigerator control device of the present invention, when the outside air temperature is high, dew condensation occurs in the outer box only after the compressor stop time becomes slightly longer than the normal temperature control after the rapid cooling operation. It is easy to do, but by setting the forced continuous operation time after the rapid cooling operation is set to a long time, it is possible to return to the normal temperature control while taking a long time to flow the high temperature refrigerant through the heat radiating pipe, thereby preventing the dew condensation of the outer box can do.

Further, the refrigerator control device of the present invention, when the temperature rise value from the internal temperature at the end of the rapid cooling operation exceeds a predetermined temperature, the compressor is forcibly operated again to return to the normal temperature control. In this case, the same effect can be obtained.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a refrigerator control apparatus according to the present invention will be described below with reference to the drawings. In addition,
The same components as those of the conventional example are designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 1 is a block diagram showing the configuration of a refrigerator control apparatus according to the first embodiment of the present invention, FIG. 2 is a flow chart for explaining the operation in the same embodiment, and FIG. 3 is a temperature characteristic in the same embodiment. It is a figure and a time chart.

In FIG. 1, the second time integration means 12 inputs the end of continuous operation of rapid cooling from the first time integration means 9, and the inside temperature determination means 8 is set to a predetermined value lower than the set temperature θA. By inputting the determination of the temperature θC, the predetermined time TB during which the compressor 2 is forcibly operated continuously is integrated. The compressor control means 10 controls the operation of the compressor 2 by the outputs of the inside temperature determination means 8, the first time integration means 9, and the second time integration means 12.

The operation of the control device 13 of the refrigerator constructed as above will be described below with reference to FIGS. 1 to 3.

Similar to the conventional refrigerator control device, the normal temperature control is performed by the internal temperature θ1 detected by the internal temperature detecting means 5.
Then, the operation of the compressor 2 is controlled by comparing the set temperature θA and the set temperature θB (Steps 1, 2, 3, 4, 5), and if the quick cooling switch 6 is turned on, the compressor 2 is turned on (Step 1).
6) Then, the first time integration means 9 integrates until the integration time T1 reaches the predetermined time TA (Steps 7 and 8). When the integrated time T1 reaches the predetermined time TA, the compressor 2 is turned off (Step 9), and the internal temperature θ1 is increased to the predetermined temperature θ.
It is judged until it becomes higher than C (Step 10). When the internal temperature θ1 becomes higher than the predetermined temperature θC, the compressor 2 is turned on (Step 11), the second time integration means 12 is started (Step 12), and the integration time T2 is integrated until the predetermined time TB is reached (Step 13). . When the cumulative time T2 reaches the predetermined time TB, the compressor 2 is turned off (Step).
5).

Therefore, in this embodiment, after the rapid cooling switch 6 is turned on and the compressor 2 is continuously operated for the predetermined time TA, the compressor 2 is stopped and the internal temperature θ1 is increased to set the set temperature. When the predetermined temperature θC lower than θA is reached, the compressor 2 is continuously operated for a predetermined time TB, so the compressor 2 does not stop for a long time after the rapid cooling operation, and the heat radiation pipe 1
It is possible to prevent the high temperature refrigerant from flowing for a long time, and to prevent dew condensation on the outer box.

The second embodiment of the present invention will be described below with reference to the drawings, in which two predetermined temperatures are set to force the compressor to continuously operate after the continuous operation of rapid cooling is completed. Further, the same parts as those of the conventional example and the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 4 is a flow chart for explaining the operation of the refrigerator controller 14 in the second embodiment of the present invention, and FIG. 5 is a temperature characteristic diagram and a time chart in the same embodiment.

In FIG. 4, by turning on the quick cooling switch 6, the compressor 2 is rapidly cooled for a predetermined time TA, and then the compressor 2 is turned off (Steps 1, 6, 7, 8).
9) When the internal temperature θ1 rises and becomes higher than the predetermined temperature θC lower than the set temperature θA, the compressor 2 is turned on (Step).
10, 11), the second time accumulating means 12 has a predetermined time TB.
Is calculated (Steps 12 and 13), the compressor 2 is turned off.
F (Step 14).

Further, the internal temperature θ1 rises to a predetermined temperature θ.
When it becomes higher than the predetermined temperature θD which is higher than C and lower than the predetermined temperature θA, the compressor 2 is turned on (Steps 15 and 16), and the second
When the time integration means 12 of (1) again integrates the predetermined time TB (Steps 17 and 18), the compressor 2 is turned off (St).
ep5).

Therefore, in this embodiment, when the outside air temperature is low, the rapid cooling switch 6 is turned on for a predetermined time T.
After the compressor 2 is continuously operated during A, the internal compartment temperature θ1 becomes much lower than when the outside air temperature is high, and the internal compartment temperature θ1 rises slowly after the compressor 2 is stopped. For,
Although the stop time of the compressor 2 becomes considerably long, when the internal temperature θ1 of the compressor 2 rises and reaches the predetermined temperatures θC and θD lower than the set temperature θA, the compressor 2 is moved in two stages for a predetermined time TB. Since continuous operation is performed, the frequency of forced operation of the compressor 2 can be increased, and normal temperature control can be restored in a short period of time.

Therefore, even when the outside air temperature is low, the compressor 2 does not stop for a long time after the rapid cooling operation, and it is possible to prevent the high temperature refrigerant from flowing into the heat radiating pipe 11 for a long time and prevent the dew condensation of the outer box. You can In this embodiment, two predetermined temperatures for forcibly and continuously operating the compressor after the continuous operation of the rapid cooling are set, but when the cooling capacity of the refrigerator is large, the set number of the predetermined temperature is increased. By doing so, the same effect can be obtained.

A third embodiment of the present invention will be described below with reference to the drawings. Further, the same parts as those of the conventional example, the first embodiment and the second embodiment are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 6 is a block diagram showing the configuration of the refrigerator control device 15 in the third embodiment of the present invention, FIG. 7 is a flow chart for explaining the operation in the same embodiment, and FIG. 8 is the temperature in the same embodiment. It is a characteristic diagram and a time chart.

In FIG. 6, reference numeral 16 denotes an outside air temperature detecting means 16 for detecting the outside air temperature outside the refrigerator, and an outside air temperature judging means 17
It is connected to the second time integrating means 18 via.

In FIG. 7, the compressor 2 is operated after the rapid cooling operation.
When the internal temperature θ1 becomes higher than the predetermined temperature θC, the compressor 2 is turned on and the second time integrating means 18 is started (Steps 1, 6, 7, 8, 9, 10, 11, 19).
Thereafter, the outside air temperature determining means 17 determines whether the outside air temperature θ2 is higher than the predetermined temperature θE (Step 20). If the outside air temperature θ2 is higher than the predetermined temperature θE, the second time integrating means 18 sets a predetermined time TC set longer than the predetermined time TB. If you add up (Step 21),
If it is lower, if TB is accumulated for a predetermined time (Step 1
3), turn off the compressor 2 (Step 5).

Therefore, in this embodiment, when the outside air temperature θ2 is high, dew condensation occurs on the outer case 3 only after the stop time of the compressor 2 becomes slightly longer than the normal temperature control after the rapid cooling operation. Although it is easy, by setting the forced continuous operation time after the end of the rapid cooling operation to a long time when the outside air temperature is high, it is possible to return to the normal temperature control while taking a long time to flow the high temperature refrigerant through the heat radiating pipe 11. It is possible to prevent dew condensation on the outer box 3.

A fourth embodiment of the present invention will be described below with reference to the drawings. The same parts as those of the conventional example, the first embodiment, the second embodiment, and the third embodiment are designated by the same reference numerals,
The description is omitted.

FIG. 9 is a flow chart for explaining the operation of the refrigerator control device 19 in the fourth embodiment of the present invention, and FIG. 10 is a temperature characteristic diagram and a time chart in the same embodiment.

In FIG. 9, the compressor 2 is operated after the rapid cooling operation.
Is turned off (Steps 1, 6, 7, 8, 9), and the internal temperature θ1 rises and the temperature increase value Δθ1 from the internal temperature θF at the end of the rapid cooling operation becomes larger than the predetermined temperature θG (Step 22). , Turn on the compressor 2 (Step 1
1) When the second time integration means 12 integrates the predetermined time TB, the compressor 2 is turned off (Steps 12, 13,
5).

Therefore, in this embodiment, the compressor 2 is forcibly operated again with the temperature increase value Δθ1 from the internal temperature θF at the end of the rapid cooling operation, so that the compressor 2 is operated similarly to the first embodiment. Without stopping for a long time after the rapid cooling operation, it is possible to prevent the high temperature refrigerant from flowing for a long time in the heat radiating pipe 11, and to prevent dew condensation on the outer box.

[0042]

As described above, according to the present invention, the compressor that circulates the refrigerant, the condenser embedded in the outer box, the inside temperature detecting means for detecting the inside temperature, and the inside temperature detecting means. The internal temperature determination means for determining whether the detected temperature is within the set temperature range in the refrigerator, the rapid cooling switch for forcibly operating the compressor continuously, and the first operation for integrating the continuous operation time And a time integration means for integrating a predetermined time for forcibly and continuously operating the compressor after the internal temperature detection means detects a predetermined temperature set lower than the set temperature after completion of continuous operation of rapid cooling. A control device for the refrigerator is configured by the time integration unit 2 and the compressor control unit that controls the operation of the compressor.

With this configuration, after the compressor is forcibly and continuously operated for a predetermined time after the rapid cooling switch is turned on, the compressor is stopped and the internal temperature detecting means is set to be lower than the set temperature of the normal temperature control. After detecting the predetermined temperature, the compressor is forcibly operated again continuously for a predetermined time to return to the normal temperature control. Therefore, the compressor does not stop for a long time after the rapid cooling operation, and it is possible to prevent dew condensation on the outer case due to the high temperature refrigerant not flowing through the heat radiating pipe for a long time.

Further, by setting a plurality of predetermined temperatures for forcibly and continuously operating the compressor after the continuous operation of the rapid cooling, the inside temperature is further lowered when the outside air temperature is low, and the compressor is also reduced. Although the internal temperature rises slowly even after the stop, the temperature of the compressor is increased for a short period by setting a predetermined temperature at multiple stages to force the compressor to continuously operate again after the rapid cooling operation is finished. It is possible to return to normal temperature control.

Further, when the outside air temperature outside the refrigerator detected by the outside air temperature detecting means is high, the predetermined time accumulated by the second time integrating means is set to be longer so that when the outside air temperature is high, rapid cooling is performed. Since the decompression tends to occur in the outer box only when the compressor stop time after operation is slightly longer than the normal temperature control, the normal temperature control is performed while taking a long time to flow the high temperature refrigerant through the heat dissipation pipe. It is possible to prevent dew condensation on the outer box by returning to.

Further, when the temperature rise value from the internal temperature at the end of the rapid cooling operation exceeds a predetermined temperature, the same effect can be obtained when the compressor is forcibly operated again to return to the normal temperature control. You can

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a first embodiment of a control device for a refrigerator according to the present invention.

FIG. 2 is a flowchart for explaining the operation in the same embodiment.

FIG. 3 is a temperature characteristic diagram and a time chart in the example.

FIG. 4 is a flowchart for explaining the operation of the second embodiment of the control device for the refrigerator according to the present invention.

FIG. 5 is a temperature characteristic diagram and a time chart in the example.

FIG. 6 is a block diagram showing the configuration of a third embodiment of the control device for the refrigerator according to the present invention.

FIG. 7 is a flowchart for explaining the operation in the same embodiment.

FIG. 8 is a temperature characteristic diagram and a time chart in the example.

FIG. 9 is a flow chart for explaining the operation of the second embodiment of the control device for the refrigerator according to the present invention.

FIG. 10 is a temperature characteristic diagram and a time chart in the example.

FIG. 11 is a block diagram of a conventional refrigerator control device.

FIG. 12 is a flowchart for explaining the operation in the conventional example.

FIG. 13 is a temperature characteristic diagram and a time chart.

[Explanation of symbols]

 2 Compressor 3 Outer box 5 In-compartment temperature detection means 6 Quick cooling switch 7 Refrigerator control device 8 In-compartment temperature determination means 9 First time integration means 10 Compressor control means 12 Second time integration means 13 Refrigerator control Device 14 Refrigerator control device 15 Refrigerator control device 16 Outside air temperature detection means 17 Outside air temperature determination means 18 Refrigerator control device 19 Refrigerator control device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Osamu Yamamoto 3-22 No. 22 Takaidahondori, Higashi-Osaka City, Osaka Prefecture Matsushita Refrigerating Machinery Co., Ltd.

Claims (4)

[Claims] 1. A compressor that circulates a refrigerant, a condenser embedded in an outer box, an in-compartment temperature detecting means for detecting the temperature in the in-compartment, and a temperature detected by the in-compartment temperature detecting means in the in-compartment. Internal temperature determination means for determining whether the temperature is within the set temperature range, a rapid cooling switch for forcibly and continuously operating the compressor, a first time integration means for integrating the continuous operation time, and a rapid cooling Second time integration means for integrating a predetermined time during which the compressor is forcibly operated continuously after the internal temperature detection means detects a predetermined temperature set lower than the set temperature after the continuous operation of A control device for a refrigerator comprising a compressor control means for controlling the operation of the refrigerator. 2. The control device for a refrigerator according to claim 1, wherein a plurality of predetermined temperatures for forcibly and continuously operating the compressor are set after the completion of the rapid cooling continuous operation. 3. An outside air temperature detecting means for detecting the outside air temperature outside the refrigerator, and when the outside air temperature detected by the outside air temperature detecting means is high, the predetermined time accumulated by the second time integrating means is set to be long. The control device for the refrigerator according to claim 1, wherein: 4. The second time integration means integrates a predetermined time period during which the compressor is forcibly operated continuously after the internal temperature rises by a predetermined temperature after the end of the continuous rapid cooling operation. The control device for the refrigerator according to 1.