KR101937969B1 - Method for controlling refrigerator - Google Patents

Abstract

The present invention relates to a control method for a refrigerator, and more particularly, to a control method for a refrigerator, which includes a step of receiving a temperature of a storage chamber from a temperature sensor within a control unit, and a step of controlling the compressor driving motor, The controller controls the rotational speed of the compressor driving motor, the condenser driving motor, and the evaporator driving motor so that the overload state of the compressor driving motor, the condenser driving motor, and the evaporator driving motor is increased, It is possible to quickly cope with the state.

Description

[0001] METHOD FOR CONTROLLING REFRIGERATOR [0002]

The present invention relates to a control method of a refrigerator, and more particularly, to a control method of a refrigerator that independently adjusts a rotation speed of a compressor driving motor, a condenser driving motor, and an evaporator driving motor based on a degree ≪ / RTI >

Generally, a refrigerator is a device for storing food at low temperature so as not to cool or decay the food, and stores the stored food in an optimal state by using cold air generated by heat exchange with a refrigerant circulating in the refrigeration cycle.

Such a refrigerator has a plurality of storage compartments. The temperature of the compartments in the storage compartment rises due to frequent opening and closing of doors, feeding and collection of food, and the storage performance of food is deteriorated when the compartment temperature rises.

That is, the load condition in the refrigerator changes depending on the outside temperature, the number of times the food is put in the food, and the opening / closing frequency of the door.

However, in the case of a general refrigerator, since the size of the heat exchanger is fixed, and the capillary is used as the refrigerant flow rate regulating device, there is a problem that it is difficult to effectively change the cooling power according to the change of the load condition.

In particular, there is a problem in that it can not cope with an overload state caused by an increase in internal temperature quickly.

A related prior art is Korean Patent Laid-Open Publication No. 10-1999-0004642 (published on January 15, 1999, titled invention: starting circuit of a refrigerator).

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to quickly adjust the rotational speed of a compressor driving motor, a condenser driving motor and an evaporator driving motor independently of the temperature inside the storage room, The present invention also provides a control method for a refrigerator which can cope with the above problems.

According to an aspect of the present invention, there is provided a control method for a refrigerator, comprising: a controller receiving input of an internal temperature of a storage chamber from an internal temperature sensor; And controlling the rotational speed of at least one of the compressor driving motor, the condenser driving motor, and the evaporator driving motor based on the degree of the in-housing temperature being out of the set range.

In the step of adjusting the rotational speed of the present invention, the controller selectively controls the rotational speeds of the compressor driving motor, the condenser driving motor, and the evaporator driving motor.

In the step of adjusting the rotational speed of the present invention, the controller increases the rotational speed in the order of the compressor driving motor, the condenser driving motor, and the evaporator driving motor.

In the step of adjusting the rotational speed of the present invention, when the in-compartment temperature is equal to or higher than the set temperature and the rate of increase of the in-compartment temperature is equal to or higher than the reference value, the controller controls the compressor driving motor, the condenser driving motor, And the rotational speed of at least one of the evaporator driving motors is adjusted.

In the present invention, the rotational speed of the compressor driving motor, the condenser driving motor, and the evaporator driving motor is increased or decreased by a predetermined set speed.

According to the present invention, when the internal temperature of the storage chamber is out of the set range and is in the overload state, the rotational speed of the compressor driving motor, the condenser driving motor, and the evaporator driving motor can be adjusted to quickly cope with the overload state.

Further, according to the present invention, when it is predicted that an overload state will occur due to a sudden increase in the internal temperature rise rate of the storage chamber, the rotational speed of the compressor driving motor, the condenser driving motor and the evaporator driving motor can be adjusted to prevent the overload state have.

1 is a block diagram showing a configuration of a control apparatus for a refrigerator according to an embodiment of the present invention.
2 is a flowchart illustrating an operation of a method of controlling a refrigerator according to an embodiment of the present invention.
3 is a flowchart illustrating an operation of a method of controlling a refrigerator according to another embodiment of the present invention.

Hereinafter, a control method of a refrigerator according to the present invention will be described in detail with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a block diagram showing a configuration of a control apparatus for a refrigerator according to an embodiment of the present invention.

1, a control apparatus for a refrigerator according to an embodiment of the present invention includes an internal temperature sensor 10, a control unit 20, and a driving motor unit 30.

The internal temperature sensor 10 measures the internal temperature of the storage room provided in the refrigerator and transmits the measured temperature to the controller 20. If there are a plurality of storage rooms provided in the refrigerator, the in-storage temperature sensor 10 may be installed in each storage room to measure the temperature inside each storage room.

On the other hand, the compressor (not shown) compresses the expanded gaseous refrigerant to a high temperature and a high pressure, and the refrigerant compressed in the gaseous state in the compressor is changed into the liquid refrigerant in the room temperature and high pressure while passing through the condenser (not shown).

The refrigerant that has passed through the condenser is supplied to an evaporator (not shown) installed in each storage room through a capillary tube (not shown) and is evaporated to cool the storage compartment.

The drive motor unit 30 includes a compressor drive motor 31, a condenser drive motor 33 and an evaporator drive motor 35 that drive the compressor, the condenser and the evaporator, respectively.

The compressor drive motor 31, the condenser drive motor 33 and the evaporator drive motor 35 may be a three-phase DC motor or a brushless motor capable of changing the rotation speed.

The control unit 20 compares the internal temperature inputted from the internal temperature sensor 10 with the setting range and controls the compressor driving motor 31, the condenser driving motor 33 and the evaporator driving motor 35 provided in the driving motor unit 30 ).

The condenser drive motor 33 and the evaporator drive motor 35 based on the degree to which the internal temperature is out of the set range when the internal temperature of the storage chamber is out of the setting range, The rotation speed of the motor is adjusted.

At this time, the controller 30 can linearly increase or decrease the rotational speeds of the compressor driving motor 31, the condenser driving motor 33, and the evaporator driving motor 35 according to the degree of the temperature in the room outside the set range. The amount of change in the linearly increasing or decreasing rotation speed may be different for each drive motor.

Here, the reference speed means the normal rotation speed of the compressor drive motor 31, the condenser drive motor 33 and the evaporator drive motor 35, and can be variously selected for different values for the respective drive motors .

The control unit 30 can increase or decrease the rotational speeds of the compressor driving motor 31, the condenser driving motor 33 and the evaporator driving motor 35 by a predetermined set speed. At this time, And can be variously selected from different values.

For example, when the compressor driving motor 31, the condenser driving motor 33 and the evaporator driving motor 35 are rotating at the reference speed of A [RPM], B [RPM], and C [RPM] The controller 20 can increase the rotational speeds of the compressor driving motor 31, the condenser driving motor 33 and the evaporator driving motor 35 by a [RPM], b [RPM], and c [RPM], respectively.

The controller 20 may control the rotational speeds of both the compressor driving motor 31, the condenser driving motor 33 and the evaporator driving motor 35. However, the controller 20 may control the rotational speed of the compressor driving motor 31 31, the condenser drive motor 33, and the evaporator drive motor 35, as shown in FIG.

For example, the control unit 20 increases the rotational speed of the compressor driving motor 31 first according to the degree of the in-housing temperature deviating from the set range, and increases the rotational speed of the condenser driving motor 33 and the evaporator driving motor 35 Can be increased in succession.

The control unit 20 adjusts the rotational speeds of the compressor drive motor 31, the condenser drive motor 33 and the evaporator drive motor 35 to quickly overload the overdrive condition when the internal temperature exceeds the set range and the overload state .

The control unit 30 controls the rotational speeds of the compressor driving motor 31, the condenser driving motor 33 and the evaporator driving motor 35 based on the internal temperature, with reference to FIGS. 2 and 3, .

2 is a flowchart illustrating an operation of a method of controlling a refrigerator according to an embodiment of the present invention.

As shown in FIG. 2, the control unit 20 receives the internal temperature of the storage room from the internal temperature sensor 10 (S100) and determines whether the internal temperature of the storage room is out of a predetermined setting range (S110).

If the internal temperature exceeds the set range, it can be regarded as an overload state. Therefore, the controller 20 controls the compressor drive motor 31, the condenser drive motor 31, The rotation speed of the evaporator driving motor 33 and the evaporator driving motor 35 is increased (S120).

At this time, the control unit 20 can increase the rotational speeds of the compressor driving motor 31, the condenser driving motor 33, and the evaporator driving motor 35 by a predetermined set speed.

Thereafter, the control unit 20 determines whether the internal temperature is decreasing again within the set range (S130).

The control unit 20 determines that the rotational speed of the compressor driving motor 31, the condenser driving motor 33 and the evaporator driving motor 35 is the reference speed (S140).

At this time, the control unit 20 can reduce the rotational speeds of the compressor driving motor 31, the condenser driving motor 33, and the evaporator driving motor 35 by a predetermined set speed.

Thus, when the internal temperature exceeds the set range and the compressor is in the overload state, the rotational speeds of the compressor driving motor 31, the condenser driving motor 33, and the evaporator driving motor 35 can be adjusted to quickly cope with the overload state.

3 is a flowchart illustrating an operation of a method of controlling a refrigerator according to another embodiment of the present invention.

2, the control unit 20 compares the internal temperature with the set range to determine the overload state. Alternatively, the control unit 20 may predict the overload state based on the rise rate of the internal temperature .

3, the control unit 20 receives the internal temperature of the storage room from the internal temperature sensor 10 (S200), and determines whether the internal temperature of the storage compartment is equal to or higher than a preset temperature (S210).

Here, the set temperature means a specific temperature within the set range described above, and it is preferable that the set temperature is selected so as to be out of the setting range when the in-housing temperature suddenly rises.

If the in-compartment temperature is equal to or higher than the preset temperature, the control unit 20 determines whether the in-compartment temperature is higher than the reference value (S220).

Here, the rising rate of the internal temperature means an increase in the internal temperature per unit time, and the reference value means the rate of increase of the internal temperature, which is a standard for judging whether or not the internal temperature suddenly increases. The reference value can be selected variously according to the intention of the designer and the product to which it is applied.

If the in-compartment temperature is higher than the set temperature and the rising rate of the in-compartment temperature is higher than the reference value, the controller 20 is in a state in which the overload state is likely to occur. 31, the condenser driving motor 33, and the evaporator driving motor 35 (S230).

At this time, the control unit 20 can increase the rotational speeds of the compressor driving motor 31, the condenser driving motor 33, and the evaporator driving motor 35 by a predetermined set speed.

Thereafter, the control unit 20 determines whether the internal temperature is decreasing again below the set temperature (S240).

If the internal temperature decreases below the set temperature, the control unit 20 reduces the rotational speeds of the compressor driving motor 31, the condenser driving motor 33 and the evaporator driving motor 35 to the reference speed again (S250 ).

At this time, the control unit 20 can reduce the rotational speeds of the compressor driving motor 31, the condenser driving motor 33, and the evaporator driving motor 35 by a predetermined set speed.

On the other hand, in steps S240 and S250 for decreasing the rotation speed of the compressor driving motor 31, the condenser driving motor 33 and the evaporator driving motor 35 in accordance with whether the internal temperature of the present embodiment is lower than the set temperature, The condenser driving motor 33 and the evaporator driving motor 35 may be reduced by determining whether the rate of rise of the compressor driving motor 31, the condenser driving motor 33, and the evaporator driving motor 35 is less than the reference value.

In the case where it is predicted that an overload state will occur due to a sudden increase in the internal temperature rise rate of the storage chamber, the rotation speed of the compressor drive motor 31, the condenser drive motor 33, and the evaporator drive motor 35 is adjusted, It can be prevented in advance.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.

10: Internal temperature sensor
20:
30: drive motor section
31: Compressor drive motor
33: Condenser drive motor
35: Evaporator drive motor

Claims (5)

The control unit receiving the internal temperature of the storage room from the internal temperature sensor; And
Wherein the controller controls the rotational speed of at least one of the compressor driving motor, the condenser driving motor, and the evaporator driving motor based on the degree to which the internal temperature is out of the setting range,
The controller determines that the internal temperature is out of the set range when the internal temperature is equal to or higher than the set temperature and the rising rate of the internal temperature is equal to or higher than the reference value, Adjusting the rotational speed of at least one of the evaporator driving motors,
Wherein the control unit selectively adjusts the rotational speed in the order of the compressor driving motor, the condenser driving motor, and the evaporator driving motor when it is determined that the in-compartment temperature is out of the set range or the in-
The rotational speeds of the compressor driving motor, the condenser driving motor, and the evaporator driving motor are increased or decreased by a predetermined set speed, and the set speeds of the compressor driving motor, the condenser driving motor and the evaporator driving motor can be set to different values, respectively Wherein the refrigerator is a refrigerator. delete delete delete delete

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