JPS629165A - Controller for operation of refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an operation control device for a refrigerator.

BACKGROUND ART A block diagram showing the configuration of a conventional refrigerator operation control device,
FIG. 6 is a flowchart for explaining the operation.

In FIG. 6, reference numeral 1 denotes an internal temperature detection means for detecting the internal temperature of the refrigerator. Reference numeral 2 denotes a set temperature detection means for detecting the set temperature. 3 is a defrosting start detection means that detects the amount of frost on the cooler and sends out an output when the amount of frost reaches a certain amount.

Reference numeral 4 denotes a defrosting end detection means that detects when the temperature of the cooler reaches a predetermined value or higher during defrosting and sends out an output to end defrosting. 5 is a control means, and input terminals 11. I2
゜I3. I4. It has output terminals 01 and 02, and the input terminals are respectively internal temperature detection means 1. Set temperature detection means 2. Defrosting start detection means 3. It is connected to the defrosting completion detection means 4. , 6 is rotation speed control means, which is connected to the output terminal o1 of the control means 5. 7 is a compressor,
It is connected to the output of the rotation speed control means 6. 8 is a defrosting relay, which has a contact 8', and 9 is a defrosting heater, which is turned on and off by the defrosting relay.

The control means 6 includes the refrigerator temperature detection means 1. The operating rotation speed of the compressor 7 is determined based on the input from the set temperature detection means 2, and the output thereof is sent to the rotation speed control means 6. Further, the control means 5 controls the defrosting relay 8 by inputs from the defrosting start detecting means 3 and the defrosting end detecting means 4.
is operated to turn the defrosting heater on and off. The rotational speed control means 6 operates the compressor 7 based on the operating rotational speed output from the control means 5.

The operation of the refrigerator operation control device configured as above will be described below with reference to FIG. 6.

In step 1, the output of the internal temperature detection means 1 is inputted to the input terminal check 1 of the control means 6.

Next, in step 2, the internal temperature of the set temperature detection means 2 is compared with the set temperature, and the determined rotation speed is outputted to the rotation speed control means 6 from the output terminal 01.

At this time, the rotation speed control means 6 operates the compressor 7 at the rotation speed determined by the control means 4. The control means 4 is
As shown in Figure 7, the difference between the internal temperature and the set temperature is, for example, 5.
If the temperature is above .degree. C., the command outputs 6400 rotations, if the temperature is between +6.degree. C. and +2.degree. C., it is 3600 rotations, if the temperature is between +2.degree. At this time, the lowest rotation speed other than 0 rotation is called the minimum rotation speed.

Next, in step 4, the output of the defrosting start detection means 3 is inputted from the input terminal I3, and it is determined whether defrosting has started. If defrosting has not started, the process returns to step 1 and the above operation is repeated, and normally this operation is continued to cool the inside of the refrigerator. However, if defrosting is to be started in step 4, the process proceeds to step 5, where the output terminal 01 outputs a rotational speed of 0 and the compressor 7 is stopped. Next, the process proceeds to step 6, where the defrosting relay 8 is turned on by outputting from the output terminal Q2, and the defrosting heater 9 is energized to start defrosting.

Next, in step 7, the output of the defrosting completion detection means 4 is inputted to the input terminal 4, and it is determined whether the defrosting is finished.

If defrosting has not been completed, return to step 6 and repeat steps 5 - 6 - 7.
Continue defrosting. When the defrosting is finished, the process proceeds to step 8, where the output of the output terminal 02 is turned off and the defrosting relay 8 is turned off.
Cut off the power to the FFL and defrosting heater 9, and proceed to step 1.
Return to

Problems to be Solved by the Invention However, with the above configuration, the minimum rotational speed remains constant even when the outside temperature changes. When operating a refrigerator, the temperature at 24°C is between +2 and -2°C when the set temperature is reached.
It is conceivable that the refrigerator will be operated at 00 rpm (minimum rotation speed) for a long time, but when the outside temperature changes, there is an optimal rotation speed that minimizes power consumption when operating the refrigerator, and it is recommended to keep the minimum rotation speed constant. In this case, there are problems in that the engine must be operated for a long time at a rotation speed that is not the optimum rotation speed depending on the outside temperature, and that it consumes a large amount of power.

In view of the above problems, the present invention aims to reduce power consumption by changing the minimum rotational speed depending on the outside temperature and operating at the optimum minimum rotational speed depending on the outside temperature conditions.

Means for Solving the Problems In order to solve the above problems, the refrigerator operation control device of the present invention includes an internal temperature detection means for detecting the internal temperature, and a set temperature detection means for detecting the set temperature.

an outside temperature detection means for detecting the ambient temperature in which the refrigerator is installed; an inside temperature detection means; a set temperature detection means;
The compressor is configured to include a control means that determines the rotation speed of the compressor based on input from the outside temperature detection means, and a rotation speed control means that operates the compressor at the determined rotation speed.

Effect The present invention has the above-described configuration, and detects the outside temperature.
The minimum rotational speed is changed depending on the outside temperature, and the minimum rotational speed during long-term operation can be set to the optimum rotational speed, thereby reducing power consumption.

Embodiment Hereinafter, a refrigerator control device according to an embodiment of the present invention will be described with reference to the drawings.

Fig. 1 is a block diagram of a refrigerator control device according to an embodiment of the present invention, Figs. 2 and 3 are flowcharts showing the operation, and Fig. 4 shows the compressor determined by the control means when the outside temperature changes. FIG.

In FIG. 1, internal temperature detection means 1. Set temperature detection means 2. Defrosting start detection means 3. Defrosting end detection means 42 rotation speed control means 6. Compressor 7, defrost relay 8. The defrosting heater 9 is the same as that shown in the conventional example, so a description thereof will be omitted.

Reference numeral 10 denotes an outside temperature detection means for detecting the ambient temperature in which the refrigerator is installed, or a temperature equivalent thereto. 11
is a control means, and input terminal 11. I2゜I3. I4.
Is, and has an output terminal CM, 02. The input terminals are respectively the internal temperature detection means 1 and the set temperature detection means 2. The defrosting start detection means 3. The defrosting end detection means 4. The outside temperature detection means 6 is connected.

Further, the output terminals are connected to the rotation speed control means 6 and the defrosting relay 8, respectively. The control means 11, the refrigerator temperature detection means 1. The operating rotation speed of the compressor 7 is determined based on the inputs of the set temperature detection means 2 and the outside temperature detection means 10, and the output thereof is sent to the rotation speed control means 6. In addition, the defrosting relay 8
is operated to turn the defrosting heater 9 on and off.

The operation of the refrigerator operation control device configured as described above will be explained with reference to FIGS. 2 and 3.

In step 1, the output of the internal temperature detection means 1 is inputted from the input terminal 11 of the control means 11. Next, in step 2, the output of the set temperature detection means 2 is inputted from the input terminal check 2 of the control means 11. Next, in step 3, step 1. The internal temperature input in step 2 is compared with the set temperature to determine the rotation speed. For example, as shown in Figure 4, if the difference between the internal temperature and the set temperature is 5℃ or more, 5400
Rotation, 3600 rotations for 5℃~2℃, 2℃~-2℃
In the case of , 2400 rotations (minimum rotation speed) is determined, and in the case of -2°C or less, 0 rotation is determined.

Next, in step 4, the output of the outside temperature detection means 10 is inputted from the input end check 6 of the control means 11, and in step 5, the rotation speed is changed, and the rotation speed is changed to the rotation speed control means 6.
It is output from the output terminal o1.

This rotation speed change will be explained using FIG. 3.

In FIG. 3, in step a, it is determined whether the number of revolutions determined in step 3 is the minimum number of revolutions, and if it is not the minimum number of revolutions, the process proceeds to step d, and the number of revolutions determined in step 3 is output. . If the rotation speed determined in step 3 is the minimum rotation speed, proceed to step b, determine whether the outside temperature input in step 4 is 20 degrees Celsius or higher, and
If it is above ℃, proceed to step d and output the rotation speed determined in step 3. If it is less than 20℃, proceed to step C and change the rotation speed to, for example, 1800 rotations, then proceed to step d and output the rotation speed determined in step 3. Outputs the rotation speed. As a result, as shown in Figure 4A, the difference between the internal temperature and the set temperature is 5.
6400 rpm if the temperature is above ℃, 360 rpm if the temperature is 5~2℃
0 rotation, 1800 rotations when the rotation is -2°C, and 0 rotation when the rotation is -2°C or less.

Next, in step 6, the output of the defrosting start detection means 3 is inputted from the input end checker 3, and it is determined whether defrosting has started. If defrosting has not started, the process returns to step 1 and the above operation is repeated, and normally this operation is continued to cool the inside of the refrigerator. However, if defrosting is started in step 6, the process proceeds to step 7, where the rotational speed ○ is output from the output terminal 01 and the compressor 7 is stopped. Next, proceed to step 8, output υ from output terminal 02 and turn on the defrosting relay.
The defrosting heater 9 is energized to start defrosting.

Next, in step 9, the output of the defrosting completion detection means 4 is inputted from the input terminal I4, and it is determined whether defrosting has ended.

If defrosting has not been completed, return to step 5 and repeat steps 7 → step 8 → step 9.
Continue defrosting. Moreover, when the defrosting is completed, the process proceeds to step 1o, the output of the output terminal o2 is turned OFF L, and the defrosting relay 8 is turned OFF.
is turned OFF, power supply to the defrosting heater 9 is cut off, and the process returns to step 1.

As described above, according to this embodiment, by providing an outside temperature detection means that detects the ambient temperature in which the refrigerator is installed, the minimum rotation speed can be changed depending on the outside temperature, and the optimum rotation speed can be selected. It is possible to reduce power consumption, and even if the minimum rotation speed is set high when the outside temperature is high and set low when the outside temperature is low, there is no effect on the cooling speed.

Effects of the Invention As described above, the present invention provides an outside temperature detection means for detecting the ambient temperature in which the refrigerator is installed, so that the minimum rotation speed can be changed depending on the outside temperature, and the refrigerator can be operated at the optimum rotation speed. This reduces power consumption.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a refrigerator operation control device according to an embodiment of the present invention, FIG. 2 is a flowchart showing the operation of FIG. 1, FIG. 3 is a flowchart of main parts in FIG. 2, and FIG.
The figure shows the rotation speed of the compressor depending on the difference between the internal temperature and the set temperature in an embodiment of the present invention, Figure 5 is a block diagram of a conventional refrigerator operation control device, and Figure 6 is the same as that of Figure 5. FIG. 7 is a flowchart showing the operation, and is a diagram showing the rotation speed of the compressor depending on the difference between the conventional refrigerator internal temperature and the set temperature. 1... Internal temperature detection means, 2... Preset temperature detection means, 6... Rotation speed control means, 7...
. . . Compressor, 10 . . . Outside temperature detection means, 11 . . . Control means. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 3 Figure 4 N to C Deaf section Figure 6 Figure 7 Internal temperature General foot temperature

Claims (1)

[Claims] An internal temperature detecting means for detecting the internal temperature of the refrigerator, a set temperature detecting means for detecting the set temperature, an outside temperature detecting means for detecting the ambient temperature in which the refrigerator is installed, and the internal temperature detecting means. , a control means for determining and outputting a rotation speed at which the compressor operates based on input from the set temperature detection means and the outside temperature detection means; and a control means for operating the compressor at the operating rotation speed determined by the control means. An operation control device for a refrigerator, comprising a rotation speed control means, which controls the minimum operating rotation speed of the compressor to be changed depending on the outside temperature.