KR20050063258A - Method for control operation of pan in refrigerator - Google Patents

Abstract

The present invention relates to a control method of a blower fan operation of a refrigerator, by adjusting the rotation speed of the blower fan according to whether the damper is opened or closed to allow the flow of cold air from the freezer compartment to the cold compartment, thereby opening the blower fan accordingly. When operating at low rotational speed and the damper is closed, the blower fan operates at high rotational speed, thereby improving the energy efficiency of the refrigerator.

In addition, by adjusting the fan fan speed according to the evaporator surface temperature detected by the defrost sensor and whether or not the damper is opened or closed, the blower fan according to the surface temperature of the evaporator in the relatively low speed range when the damper is opened by the initial start of the compressor. The rotation speed of the fan is controlled according to the surface temperature of the evaporator in the relatively high rotational speed range when the damper is sealed by satisfying the refrigerating chamber temperature, thereby greatly improving the energy efficiency of the refrigerator. .

Description

Method for control of fan operation in refrigerator {Method for control operation of pan in refrigerator}

The present invention relates to a refrigerator, and more particularly, an evaporator surface temperature and a damper which are controlled by the number of rotations of a blower fan or by a defrost sensor according to whether a damper is opened or closed to allow a flow of cold air from a freezer compartment to a cold compartment. The present invention relates to a method of controlling a blower fan of a refrigerator to adjust the rotation speed of the blower fan according to whether the fan is opened or closed to improve energy efficiency of the refrigerator.

In general, a refrigerator includes a freezing cycle in which a freezer compartment F and a refrigerator compartment R are partitioned by the barrier 1 as shown in FIG. 1, and the freezer compartment F and the refrigerator compartment R are kept at a low temperature. A main body 2 equipped with a device, a freezer compartment door (not shown) rotatably connected to the main body 2 to open and close the freezer compartment F, and the main body 2 to open and close the refrigerating compartment R. It is configured to include a refrigerator compartment door (not shown) rotatably connected to the).

The refrigeration cycle apparatus includes a compressor (not shown) for compressing a low temperature low pressure gas refrigerant, a condenser (not shown) in which the high pressure refrigerant compressed by the compressor is radiated to outside air, and condensed, and the refrigerant condensed in the condenser is An expansion device (not shown) to be depressurized, and the evaporator 30 is evaporated to take the heat of the freezing chamber (F) and the refrigerating chamber (R) is evaporated by the adiabatic expansion in the expansion device.

In the case of the refrigerator configured as described above, the low-temperature low-pressure gaseous refrigerant is compressed to high temperature and high pressure by the compressor, and the compressed high-temperature high-pressure gas phase refrigerant is condensed in the course of passing through the condenser and phase-changed into a high-pressure liquid phase. The phase-changed refrigerant is adiabaticly expanded to low temperature and low pressure while passing through the expansion valve, and is then evaporated in the evaporator 30 to take heat from the surroundings to cool the air around the phase change to the low temperature low pressure gas phase. The air cooled through the evaporator 30 is circulated into the freezer and the refrigerating chamber by the operation of the blower fan 12 located at one side of the evaporator 30, thereby lowering the temperature of the freezer compartment F and the refrigerating chamber R. Will be achieved.

The cold air generated by the above-mentioned refrigeration cycle is discharged to the front of the freezing chamber F by driving the blower fan 12, and the cold air duct on the upper part of the refrigerating chamber R communicating with the blowing chamber 10 at the upper end of the freezing chamber F. In this case, a damper (not shown) is installed between the blower chamber 10 at the upper end of the freezing chamber F and the cold air duct 20 at the upper end of the refrigerating chamber R. By the opening and closing action to control the flow rate of the cold air flowing from the blowing chamber 10 to the cold air duct 20, in the case of the refrigerator configured as described above, the freezer compartment temperature reference to control the compressor based on the almost freezer compartment temperature (F) Control schemes will be used.

As shown in FIG. 2, the freezer compartment temperature reference control method includes a freezer compartment in which a freezer compartment F temperature measured by the temperature sensor 14 of the refrigerator is measured based on the freezer compartment F temperature. F) When the temperature rises above the upper limit, the compressor is started to circulate the refrigerant to cool the inside of the refrigerator. As described above, the compressor is started based on the temperature of the freezer compartment F, and then the damper of the refrigerator compartment R is opened. After opening and cooling the freezing compartment F and the refrigerating compartment R at the same time, and when the temperature of the refrigerating compartment R drops below the lower limit of the preset refrigerating compartment R temperature, the opened damper is sealed to freeze the compartment ( Only F) is cooled, and when the temperature of the freezer compartment F drops below the lower limit of the preset freezer compartment F temperature, the compressor in operation is stopped and the refrigeration cycle is stopped.

In the freezer compartment temperature reference control method, when the damper is opened as described above, the refrigerator compartment (R) air (chiller) and the freezer compartment (F) air having a higher temperature than the air (chiller) of the relative freezer compartment F are mixed and the evaporator 30 Since the air flows into the evaporator 30, that is, the temperature of the mixed air in which the air flowing into the evaporator 30, that is, the air in the refrigerating chamber R and the freezing chamber F, is relatively high, is achieved. The amount of heat that can be transferred is greater than the cooling power generated by the compressor, and the refrigerant at the outlet of the evaporator 30 is in an overheated state.

As such, when the refrigerant that has become overheated on the outlet side of the evaporator 30 is sucked into the compressor, the efficiency of the compressor that compresses the superheated refrigerant decreases, which leads to an increase in power consumption due to a decrease in overall cycle efficiency. As the blower fan 12 rotates at a high speed while supplying more air than necessary to 30, additional power consumption is also caused, which greatly reduces the energy efficiency of the refrigerator.

The present invention devised to solve the above problems, by adjusting the number of rotation of the blower fan according to whether the damper to open or close the flow of cold air from the freezer compartment, the blower fan at the time of opening the damper accordingly The purpose is to operate at a low rotational speed, and the blower fan is operated at a high rotational speed when the damper is sealed to greatly improve the energy efficiency of the refrigerator.

In addition, by adjusting the fan fan speed according to the evaporator surface temperature detected by the defrost sensor and whether or not the damper is opened or closed, the blower fan according to the surface temperature of the evaporator in the relatively low speed range when the damper is opened by the initial start of the compressor. It is possible to greatly improve the energy efficiency of the refrigerator by controlling the rotation speed and controlling the rotation speed of the blower fan according to the surface temperature of the evaporator in the relatively high rotation speed range when the damper is sealed by satisfying the refrigerator compartment temperature. There is this.

The object of the present invention is to adjust the number of rotation of the blower fan according to whether the damper to open or close the flow of cold air from the freezer to the refrigerating chamber, or according to the evaporator surface temperature detected by the defrost sensor and the opening and closing of the damper. It can be solved by the fan operation control method of the refrigerator configured to improve the energy efficiency of the refrigerator by adjusting the rotation speed of the blowing fan, it will be described in detail with reference to the accompanying drawings.

Figure 3 shows a flow-chart for adjusting the rotational speed of the blowing fan according to whether the damper opening and closing of the present invention, Figure 4 shows an operating state diagram for adjusting the rotational speed of the blowing fan according to whether or not the damper opening and closing of the present invention. .

The blower fan operation control method of the present invention is a refrigerator that discharges cold air generated by a refrigeration cycle that circulates a compressor, a condenser, an expansion valve, and an evaporator 30 by driving the blower fan 12 to lower the temperature in the refrigerator. In;

In the refrigeration cycle operation according to the start of the compressor, a blowing fan control algorithm for adjusting the rotational speed of the blower fan 12 according to whether or not the damper to open the cold air discharge from the freezer compartment (F) to the refrigerating chamber (R) Through this will improve the energy efficiency of the refrigerator.

In this case, the blowing fan control algorithm may include setting a rotation speed of the blowing fan 12 to drive the blowing fan 12 at a low rotation speed or a high rotation speed according to whether the damper is opened or closed;

Detecting (120) whether the damper is opened or closed through a sensor (not shown);

Determining (130) whether the damper is opened or closed by a signal sensed by the sensor;

 When it is determined that the damper is opened by the signal, operating the blower fan 12 at a low rotation speed to reduce the flow rate of the mixed air flowing into the evaporator 30;

When it is determined that the damper is closed by the signal, the step (150) of operating the blowing fan 12 at a high rotation speed to increase the flow rate of the mixed air flowing into the evaporator 30; .

Another blower fan operation control method of the present invention is a refrigerator that discharges cold air generated by a refrigeration cycle circulating a compressor, a condenser, an expansion valve, and an evaporator (30) by driving the blower fan (12) to lower the temperature in the refrigerator. In;

The defrost sensor 32 is installed at a predetermined position of the evaporator 30, and the surface temperature of the evaporator 30 measured by the defrost sensor 32, and the cold air discharge from the freezing chamber F to the refrigerating chamber R are made. It is to improve the energy efficiency of the refrigerator through a blowing fan control algorithm that adjusts the rotation speed of the blowing fan 12 according to whether the damper to open or close.

At this time, the blowing fan control algorithm sets the rotation speed of the blowing fan 12 to drive the blowing fan 12 at a low or high rotation speed according to whether the damper is opened or closed and the surface temperature of the evaporator 30. Step 210;

Measuring (220) the surface temperature of the evaporator (30) through the defrost sensor (32) installed on the evaporator (30);

Detecting (230) whether the damper is opened or closed through a sensor (not shown);

Determining (240) whether the damper is opened or closed by a signal sensed by the sensor;

When it is determined that the damper is opened by the signal, operating the blowing fan 12 at a predetermined speed corresponding to the surface temperature of the evaporator 30 measured by the defrost sensor 32 in a low rotational speed range 250;

When it is determined that the damper is closed by the signal, operating the blower fan 12 at a predetermined speed corresponding to the surface temperature of the evaporator 30 measured by the defrost sensor 32 in a high rotational speed range. 260; consisting of.

Hereinafter, a blower fan operation control method of the present invention will be described in detail, and the same reference numerals will be applied to the same configuration as the above-described conventional invention.

Blowing fan operation control method of the refrigerator according to the present invention, by discharging the cool air generated by the refrigeration cycle circulating the compressor, condenser, expansion valve, evaporator 30 by the drive of the blower fan 12 to lower the temperature in the refrigerator In a refrigerator;

During the operation of the refrigeration cycle according to the compressor startup, through a blower fan control algorithm that adjusts the rotation speed of the blower fan 12 according to whether the damper is opened or closed so that cold air is discharged from the freezer compartment F to the refrigerating compartment R. It is to improve the energy efficiency of the refrigerator.

At this time, the blowing fan control algorithm, as shown in Figure 3, to set the rotational speed of the blowing fan 12 to drive the blowing fan 12 at a low or high rotational speed depending on whether the damper is opened or closed Step 110; Detecting whether the damper is opened or closed through a sensor (120); Determining (130) whether the damper is opened or closed by a signal sensed by the sensor; When it is determined that the damper is opened by the signal, operating the blower fan 12 at a low rotation speed to reduce the flow rate of the mixed air flowing into the evaporator 30; When it is determined that the damper is closed by the signal, the step (150) of operating the blowing fan 12 at a high rotation speed to increase the flow rate of the mixed air flowing into the evaporator 30; .

Through the above steps 110 to 150, the rotation speed of the blower fan 12 is adjusted according to whether the damper is opened or closed. In this case, as shown in FIG. 4, the freezer compartment F is relatively opened when the damper is opened. When the refrigerator (R) air (chill) and the freezer (F) air that is hot compared to the air (cold) of the air is introduced into the evaporator 30, the temperature of the air flowing into the evaporator 30, that is, the refrigerator compartment (R) ) The temperature of the mixed air in which air and the freezer compartment (F) are mixed is relatively high, so that the amount of heat that can be transferred from the mixed air to the refrigerant is greater than the cooling power generated by the compressor, and the outlet refrigerant of the evaporator 30 is overheated. Since the heat flow rate is reduced by lowering the rotation speed of the blowing fan 12 according to the overheated state of the evaporator 30 outlet refrigerant, the amount of heat transferred from the mixed air to the refrigerant does not significantly decrease. Same blower fan (1 As the input current of the blowing fan 12 due to the decrease in the number of revolutions is reduced, the energy efficiency of the refrigerator is greatly improved.

On the contrary, when only the air (cold air) of the freezer compartment F flows into the evaporator 30 as shown in FIG. 4 when the damper is sealed, the amount of heat that can be transferred from the air flowing into the evaporator 30 to the refrigerant. The amount of heat of the evaporator 30 due to the increase in the rotational speed of the blower fan 12 is increased by increasing the rotational speed of the blower fan 12 while being smaller than the amount of heat that the refrigerant can absorb. Leading to the increase is also a feature that can greatly improve the energy efficiency of the refrigerator.

In contrast to the flow chart shown in FIG. 3, a process of adjusting the rotation speed of the blower fan 12 according to whether the damper is opened or closed will be described below.

First, the blower fan 12 is driven at a low or high speed according to whether or not the damper is opened or closed so that the cool air discharged by driving the blower fan 12 is discharged from the freezer compartment F to the refrigerating chamber R. After setting the rotation speed of the blower fan 12 to operate 110, the sensor senses whether the damper is opened or closed 120, and then the damper is opened or closed by a signal detected by the sensor. It is determined whether or not (130).

At this time, when it is determined that the damper is opened through the signal sensed by the sensor, the blower fan 12 is reduced so as to reduce the flow rate of the mixed air flowing into the evaporator 30 among the refrigeration cycle equipment. If the damper is judged to be closed through the signal sensed by the sensor, on the contrary, the blower fan 140 may increase the flow rate of the mixed air flowing into the evaporator 30. By operating 150 at a high rotation speed 12, the rotation speed of the blower fan 12 is adjusted according to whether the damper is opened or closed as described above.

5 is a front view showing a defrost sensor (temperature sensor) installed in the evaporator according to the present invention, Figure 6 is yet another blowing fan operation control method of the present invention, detected using a defrost sensor installed in the evaporator of FIG. It shows a flow chart for controlling the rotation speed of the blower fan according to the evaporator surface temperature and whether the damper is opened or closed, Figure 7 according to the evaporator surface temperature and whether the damper is opened or closed detected using the defrost sensor installed in the evaporator of FIG. The operation state diagram for controlling the rotation speed of the blowing fan is shown.

Another blower fan operation control method of the present invention is a refrigerator that discharges cold air generated by a refrigeration cycle circulating a compressor, a condenser, an expansion valve, and an evaporator (30) by driving the blower fan (12) to lower the internal temperature of the refrigerator. To;

By installing the defrost sensor 32 at a predetermined position of the evaporator 30, the surface temperature of the evaporator 30 detected by the defrost sensor 32 and the cold air discharge are made from the freezer compartment F to the refrigerating chamber R. It is to improve the energy efficiency of the refrigerator through a blowing fan control algorithm that adjusts the rotation speed of the blowing fan 12 according to whether the damper to open or close.

At this time, the blowing fan control algorithm, as shown in Figure 6, the blowing fan to operate the blowing fan 12 at a low or high rotational speed depending on whether the damper is opened and closed and the surface temperature of the evaporator 30. Setting the number of revolutions (12) (210); Measuring (220) the surface temperature of the evaporator (30) through the defrost sensor (32) installed on the evaporator (30); Detecting (230) whether the damper is opened or closed through a sensor; Determining (240) whether the damper is opened or closed by a signal sensed by the sensor; When it is determined that the damper is opened by the signal, operating the blowing fan 12 at a predetermined speed corresponding to the surface temperature of the evaporator 30 measured by the defrost sensor 32 in a low rotational speed range 250; When it is determined that the damper is closed by the signal, operating the blower fan 12 at a predetermined speed corresponding to the surface temperature of the evaporator 30 measured by the defrost sensor 32 in a high rotational speed range. 260; consisting of.

Through the above steps 210 to 260, the rotation speed of the blower fan 12 is adjusted according to whether the damper is opened or closed and the surface temperature of the evaporator 30. At this time, the damper is opened by the initial startup of the compressor. As shown in FIG. 2, when the refrigerating chamber R air (cold air) and the freezing chamber F air, which are relatively hot than the air (cold air) of the freezing chamber F, are mixed and introduced into the evaporator 30, the evaporator 30 ), That is, the temperature of the air flowing into the refrigerating chamber (R) and the freezing chamber (F) is a relatively high temperature, in this case the refrigerant than the amount of heat that can be transferred to the refrigerant from the mixed air Since the amount of heat that can be transferred from the mixed air to the refrigerant is greater than the cooling power generated by the compressor, the amount of heat that can be absorbed by the refrigerant forming an overheated state is less, and according to the surface temperature of the evaporator 30 in a relatively low rotation speed range. By adjusting the rotation number of the blowing fan 12, there is a characteristic that can greatly improve the energy efficiency of the refrigerator.

On the contrary, when the damper is sealed by satisfying the temperature of the refrigerating chamber R, as shown in FIG. 7, when only the air (cold air) of the freezing chamber F flows into the evaporator 30, it is introduced into the evaporator 30. Since the amount of heat that can be transferred from the air to the refrigerant is smaller than the amount of heat that the refrigerant can absorb, by adjusting the rotation speed of the blower fan 12 according to the surface temperature of the evaporator 30 in a relatively high rotation speed range, There is also a feature that can greatly improve the energy efficiency of the refrigerator.

In contrast to the flow chart shown in FIG. 6, a process of controlling the rotation speed of the blower fan 12 according to whether the damper is opened or closed and the surface temperature of the evaporator 30 will be described.

First, the blower fan 12 depends on whether the damper is opened or closed and the surface temperature of the evaporator 30 allows the cool air discharged through the blower fan 12 to be discharged from the freezer compartment F to the freezer compartment R. After setting (210) the number of rotations of the blower fan 12 so as to operate at low or high rotational speeds, the surface temperature of the evaporator 30 is adjusted through the defrost sensor 32 installed on the evaporator 30. The measurement 220 detects 230 whether the damper is opened or closed through a sensor, and determines whether the damper is opened or closed by a signal detected by the sensor.

At this time, when it is determined that the damper is opened through the signal sensed by the sensor, the defrost sensor at a low speed range to reduce the flow rate of the mixed air flowing into the evaporator 30 of the refrigeration cycle equipment The blower fan 12 is operated 250 at a predetermined speed corresponding to the surface temperature of the evaporator 30 measured by 32, and conversely, the damper is determined to be sealed by a signal detected by the sensor. If so, the blowing fan at a predetermined speed corresponding to the surface temperature of the evaporator 30 measured by the defrost sensor 32 in a high rotational speed range to increase the flow rate of air flowing into the evaporator 30 By operating (260) (12), the number of rotations of the blower fan 12 is adjusted according to whether the damper is opened or closed and the surface temperature of the evaporator 30 as described above.

The above blower fan operation control method includes a freezer compartment as well as a side by side type refrigerator in which the freezer compartment F and the refrigerator compartment R are divided into left and right sides according to one embodiment of the present invention. F) Top Mount-Type Refrigerator with top and bottom compartments R and Bottom Freezer-Type with Top and Bottom compartments F and R compartments Note that it can also be applied to refrigerators, etc.).

In the present invention, a blower fan operation control method of the refrigerator controls the number of revolutions of the blower fan according to whether the damper is opened or closed to allow the flow of cold air from the freezer compartment to the cold compartment. When operating at a high speed, the fan is operated at a high rotational speed when the damper is sealed has an excellent effect to greatly improve the energy efficiency of the refrigerator.

In addition, by adjusting the fan fan speed according to the evaporator surface temperature detected by the defrost sensor and whether or not the damper is opened or closed, the blower fan according to the surface temperature of the evaporator in the relatively low speed range when the damper is opened by the initial start of the compressor. The rotation speed of the fan is controlled according to the surface temperature of the evaporator in the relatively high rotational speed range when the damper is sealed by satisfying the refrigerating chamber temperature, thereby greatly improving the energy efficiency of the refrigerator. .

1 is a perspective view of a typical refrigerator with a freezer door and a refrigerating compartment door open.

Figure 2 is a state diagram of the operation of the compressor and the damper, the blowing fan according to the setting range of the conventional freezer compartment temperature.

Figure 3 is a flow chart for adjusting the number of revolutions of the blower fan according to whether the damper opening and closing of the present invention.

Figure 4 is an operating state of adjusting the rotational speed of the blowing fan according to whether the damper opening and closing of the present invention.

5 is a front view of a defrost sensor (temperature sensor) installed in the evaporator according to the present invention.

Figure 6 is another blow fan operation control method of the present invention, a flow chart for adjusting the rotation speed of the blow fan according to the evaporator surface temperature and the damper opening and closing detected using the defrost sensor installed in the evaporator of FIG.

7 is an operating state diagram of adjusting the number of revolutions of the blower fan according to whether or not the damper surface temperature and damper opening and closing using the defrost sensor installed in the evaporator of FIG.

Explanation of symbols on main parts of drawing

F. Freezer R. Fridge

2. Main Unit 10. Blower Room

12. Blower fan 14. Freezer temperature sensor

20. Cold duct 22. Multi duct

20a, 22a. Cold air outlet 24. Cold room temperature sensor

30. Evaporator 32. Defrost sensor

Claims (4)

A refrigerator which discharges cold air generated by a refrigeration cycle circulating through a compressor, a condenser, an expansion valve, and an evaporator by driving a blower fan, thereby lowering a temperature in a refrigerator; During the operation of the refrigeration cycle according to the compressor startup, the energy efficiency of the refrigerator can be improved through a blowing fan control algorithm that adjusts the rotation speed of the blowing fan according to whether or not the damper is opened or closed so that cold air is discharged from the freezing compartment to the refrigerating compartment. Blowing fan operation control method of the refrigerator, characterized in that. The method of claim 1, wherein the blowing fan control algorithm comprises the steps of: setting the rotational speed of the blowing fan to operate the blowing fan at a low or high rotational speed according to whether the damper is opened or closed; Detecting whether the damper is opened or closed through a sensor; Determining whether the damper is opened or closed by a signal sensed by the sensor;  When the damper is determined to be open by the signal, operating the blower fan at a low rotation speed to reduce the flow rate of the mixed air flowing into the evaporator; When the damper is determined to be closed by the signal, operating the blower fan at a high speed to increase the flow rate of the mixed air flowing into the evaporator; and controlling the blower fan operation of the refrigerator Way. A refrigerator which discharges cold air generated by a refrigeration cycle circulating through a compressor, a condenser, an expansion valve, and an evaporator by driving a blower fan, thereby lowering a temperature in a refrigerator; Blowing air is controlled to adjust the number of revolutions of the blower fan by installing a defrost sensor at a predetermined position of the evaporator and opening / closing of the damper to discharge cold air from the freezer compartment to the refrigerating compartment. Blowing fan operation control method for a refrigerator characterized in that to improve the energy efficiency of the refrigerator through a fan control algorithm. 4. The method of claim 3, wherein the blowing fan control algorithm comprises: setting a rotation speed of the blowing fan to drive the blowing fan at a low or high speed according to whether the damper is opened or closed and the surface temperature of the evaporator; Measuring the surface temperature of the evaporator through a defrost sensor installed on the evaporator; Detecting whether the damper is opened or closed through a sensor; Determining whether the damper is opened or closed by a signal sensed by the sensor; Operating the blower fan at a preset speed corresponding to the surface temperature of the evaporator measured by the defrost sensor in a low rotational speed range when determining that the damper is opened by the signal; Determining that the damper is sealed by the signal, operating the blower fan at a predetermined speed corresponding to the surface temperature of the evaporator measured by the defrost sensor in a high rotational speed range. How to control blower fan operation of refrigerator.