KR102011828B1 - Refrigerator and Control method of the same - Google Patents

Abstract

The present invention and the freezer compartment is formed; A refrigeration cycle apparatus installed in the main body and including a compressor, a condenser, a hot line, an expansion mechanism, and an evaporator through which the refrigerant passes sequentially; A blowing fan circulating air in the freezing chamber to the evaporator and the freezing chamber; A condensation fan for blowing air to the condenser; A humidity sensor for sensing humidity, wherein if the freezer temperature is unsatisfactory and the humidity sensed by the humidity sensor is less than the set value, a first mode is input to the compressor and the condensation fan is driven at a first rotational speed; If the freezer temperature is unsatisfactory and the humidity detected by the humidity sensor is above the set point, the compressor has a second mode in which a second power higher than the first power is input and the condenser fan is driven at a second rotation speed lower than the first rotation speed. In addition, the second mode has the advantage of increasing the temperature of the refrigerant flowing into the hot line to increase the effect of preventing dew condensation by the hot line.

Description

Refrigerator and its operation method {Refrigerator and Control method of the same}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator and a method of operating the same, and more particularly, to a refrigerator in which a condenser fan blows air to a condenser and a method of operating the same.

In general, a refrigerator is a device that cools a storage compartment such as a refrigerating compartment and a freezing compartment by using a refrigeration cycle device including a compressor, a condenser, an expansion mechanism, and an evaporator.

The refrigerator may include a main body in which a storage compartment such as a freezing compartment is formed, a door connected to the main body to open and close the storage compartment, a blowing fan for circulating air in the storage compartment to the evaporator and the storage compartment, and a condensation fan for blowing air to the condenser.

The refrigerator may have a temperature difference between the inside and the outside of the refrigerator, and dew may form on a portion of the main body where the door contacts with each other when the external environment is hot and humid. This is because the indoor air in the room temperature is heat-transferd to the cold in the cold state and the dew point occurs as the cold air temperature in the cold state rises. The dew point as described above mainly forms dew on the part where the door and the main body come into contact with each other by the temperature difference between the inside of the refrigerator and the outside of the refrigerator when the door is opened.

The refrigerator may remove the dew as the refrigerant passes through the hot line when the hot line is installed in the main body.

The refrigerator according to the related art may have a low refrigerant temperature introduced into a hot line when the heat dissipation performance of the condenser is high, and a dew condensation preventing effect by the hot line may be low.

The refrigerator according to the present invention for solving the above problems is a body formed with a freezer; A refrigeration cycle apparatus installed in the main body and including a compressor, a condenser, a hot line, an expansion mechanism, and an evaporator through which refrigerant passes sequentially; A blowing fan circulating air in the freezing chamber to the evaporator and a freezing chamber; A condensation fan for blowing air to the condenser; And a humidity sensor for sensing humidity, and if the freezer temperature is unsatisfactory and the humidity detected by the humidity sensor is lower than a set value, first power is input to the compressor, and the first condensation fan is driven at a first rotational speed. Mode and when the freezer temperature is unsatisfactory and the humidity sensed by the humidity sensor is higher than or equal to a set value, a second power higher than the first power is input to the compressor and the condensation fan is driven at a second rotation speed lower than the first rotation speed. Has a second mode.

A method of operating a refrigerator according to the present invention includes the steps of: a humidity sensor detecting humidity; If the detected humidity is less than the set humidity and the freezer temperature is unsatisfactory, the condenser fan for blowing air to the condenser is driven at the first rotational speed and the first power is input to the compressor for compressing the refrigerant, and the detected humidity is set to the humidity. And if the freezer temperature is unsatisfactory, the condensation fan is driven at a second rotational speed lower than the first rotational speed and a second power higher than the first power is input to the compressor.

The present invention has the advantage of increasing the temperature of the refrigerant flowing into the hot line when the possibility of dew condensation due to high humidity can increase the effect of preventing dew condensation by the hot line.

1 is a front view showing the inside of the main body of an embodiment of the refrigerator according to the present invention;
2 is a plan sectional view of an embodiment of a refrigerator according to the present invention;
3 is a view showing a refrigeration cycle apparatus of a refrigerator one embodiment according to the present invention;
4 is a control block diagram of an embodiment of a refrigerator according to the present invention;
5 is a view showing an operation mode according to the freezer compartment temperature in one embodiment of a refrigerator according to the present invention.
6 is a flowchart illustrating an embodiment of a control method of a refrigerator according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a front view showing the inside of the main body of the refrigerator according to an embodiment of the present invention, Figure 2 is a plan sectional view of one embodiment of the refrigerator according to the present invention, Figure 3 is a refrigeration cycle device of one embodiment of the refrigerator according to the present invention 4 is a control block diagram of an embodiment of a refrigerator according to the present invention.

The refrigerator of this embodiment includes a main body 2, a refrigeration cycle apparatus 4, a blowing fan 6, a condensation fan 8 and a humidity sensor 10. The main body 2 is formed with a freezing compartment F. The refrigeration cycle device 4 is installed in the main body 2. The refrigeration cycle apparatus 4 includes a compressor 40, a condenser 44, a hot line 46, an expansion mechanism 48, and an evaporator 50 through which refrigerant passes sequentially. The blowing fan 6 circulates air in the freezing chamber F to the evaporator 50 and the freezing chamber F. The condensation fan 8 blows air to the condenser 44. The humidity sensor 10 detects humidity.

The main body 2 may include a freezer compartment door 21 that opens and closes the freezer compartment F. The main body 2 may be formed separately from the freezer compartment (F) and the refrigerating compartment (R) partitioned. The main body 2 may include a refrigerator compartment door 22 that opens and closes the refrigerator compartment R. The main body 2 may include a barrier 24 partitioning the freezing compartment F and the refrigerating compartment R. The main body 2 may include an outer casing 26 forming an outer appearance of the refrigerator, and a freezer inner casing 28 disposed inside the outer casing 26 and having a front surface open and having a freezing compartment F formed therein. have. The main body 2 may further include a refrigerating chamber inner casing 30 disposed inside the outer casing 26 and having a refrigerating chamber R formed therein. The main body 2 may be formed with a machine room (not shown) in which the compressor 40 or the like may be installed. The main body 2 may include a cooling chamber C installed with an evaporator 50 and cooled as air passes therethrough. Cooling chamber (C) may be formed in communication with the freezing chamber (F). In the refrigerator, the refrigerating chamber R may communicate with at least one of the cooling chamber C and the freezing chamber F. The cooling chamber C can be formed inside the freezing chamber inner casing 28. The cooling chamber C can be formed in the refrigerating chamber inner casing 30. The cooling chamber C can be formed between the freezer compartment inner casing 28 and the outer case 26. The cooling chamber C can be formed between the refrigerating chamber inner casing 30 and the outer case 26. The main body 2 may be formed together with the freezing compartment F and the cooling chamber C in the freezer compartment inner casing 28, and the freezer compartment inner casing 28 rear plate and the cooling chamber ( The discharge panel 32 forming C) can be arranged. In the discharge panel 32, a freezer compartment cold air discharge passage 33 through which air cooled by the evaporator 50 is discharged to the freezer compartment F may be formed. In the discharge panel 32, a freezing chamber cold air recovery passage 34 through which air in the freezing chamber F is sucked into the cooling chamber C may be formed. In the barrier 24, a refrigerating chamber cold air discharge passage 35 through which air in the cooling chamber C or the freezing chamber F is discharged to the refrigerating chamber R may be formed. In the barrier 24, a refrigerating chamber cold air recovery passage 36 through which air in the refrigerating chamber R is sucked into the cooling chamber C or the freezing chamber F may be formed. When the refrigerator further includes a refrigerating compartment (R), the refrigerator may further include a refrigerating compartment damper (38) for allowing air cooled by the evaporator 50 to be supplied or blocked to the refrigerating compartment (R). The refrigerator compartment damper 38 may control the air blown from the evaporator 50 to the refrigerator compartment R. The refrigerator compartment damper 38 may be installed in the barrier 24 or disposed inside the refrigerator compartment R. When the refrigerating compartment damper 38 is installed in the barrier 24, the refrigerating compartment damper 38 may be installed in the refrigerating compartment cold air discharge passage 35, and may control the cold air passing through the refrigerating compartment cold air discharge passage 35. When the refrigerating compartment damper 38 is installed in the refrigerating compartment R, the refrigerating compartment damper 38 may be installed at an upper portion of the refrigerating compartment R and may communicate with the refrigerating compartment cold air discharge passage 33. The refrigerating compartment damper 38 may control the cold air flowing through the refrigerating compartment cold air discharge passage 33 in the cooling chamber C. When the refrigerator compartment damper 38 is opened, the cold air may flow into the refrigerator compartment R, and when the refrigerator compartment damper 38 is closed, the cold air may not flow into the refrigerator compartment R.

The compressor 40, the condenser 44, the hot line 46, the expansion mechanism 48, and the evaporator 50 may be connected to the refrigerant passage. The refrigerant passage may be formed by a refrigerant tube through which the refrigerant passes.

The compressor 40 may suck and compress the refrigerant evaporated from the evaporator 50 and discharge the compressed refrigerant. The compressor 40 may be connected to the evaporator 50 and the compressor suction passage 41. The compressor 40 may be connected to the condenser 44 and the compressor discharge passage 42. The refrigerant evaporated in the evaporator 50 may pass through the compressor suction passage 41 and be sucked into the compressor 40, and the refrigerant compressed in the compressor 40 may pass through the compressor discharge passage 42 to the condenser 44. Can be guided. The compressor 40 may be installed in a machine room formed in the main body 2. Compressor 40 may be a compressor such as a rotary compressor, a scroll compressor, or a linear compressor, and may discharge a refrigerant having a higher temperature and pressure than when a low power is input when a high power is input among the first power and the second power. have. The power input to the compressor 40 can be varied by varying the current or varying the voltage.

The condenser 44 may condense the refrigerant compressed by the compressor 40. The condenser 44 may be installed in the machine room formed in the main body 2 or may be installed to be exposed to the outside of the main body 2. The condenser 44 may be connected to a condenser outlet flow path 45 through which the refrigerant passing through the condenser 44 is guided. The refrigerant condensed in the condenser 44 may be guided to the hot line 46 through the condenser outlet flow passage 45.

The hot line 46 may be installed between the condenser 44 and the expansion mechanism 48 in the refrigerant flow direction. The hot line 46 may be installed to evaporate and remove the dew that the refrigerant passing through the condenser 44 forms in the refrigerator. The hot line 46 may be formed by a refrigerant tube installed at a portion of the main body 2 that contacts the door. The hot line 46 may be installed inside the main body 2, and may radiate heat through the outer casing 26. The refrigerant passing through the condenser 44 may radiate and condense while passing through the hot line 46. The hot line 46 may be provided at a portion of the main body 2 where the main body 2 and the freezer compartment door 21 are in contact with each other. The hot line 46 may be provided at a portion of the main body 2 where the main body 2 and the freezer compartment door 21 are in contact with each other. In the refrigerator, the condenser outlet flow passage 45 may be connected to the hot line 46. The hot line 46 may be connected to a hot line outlet passage 47 through which the refrigerant passing through the hot line 46 is guided.

 The refrigerator may further include a refrigerant control valve 52 installed between the hot line 46 and the expansion mechanism 48 to control the refrigerant. The refrigerant control valve 52 may guide the refrigerant passing through the hot line 46 to the expansion mechanism 48 in the open (open mode). The refrigerant control valve 52 may prevent the refrigerant passing through the hot line 46 from flowing to the expansion mechanism 48 at the time of closing (close mode). The refrigerant control valve 52 may be configured as an electromagnetic valve.

The expansion mechanism 48 may expand the refrigerant passing through the hot line 46. The expansion mechanism 48 may include a capillary tube or may include an electronic expansion valve such as EEV or LEV. The expansion mechanism 48 may comprise a plurality of capillary tubes 49A and 49B, and two capillary tubes of the first capillary tube 49A and the second capillary tube 49B. 49A, 49B. The first capillary tube 49A and the second capillary tube 49B may have different diameters. The first capillary tube 49A and the second capillary tube 49B may have different lengths. The refrigerant control valve 52 may be connected to the hot line outlet passage 47, may be connected to the first capillary tube 49A and the first capillary tube connecting passage 55, and the second capillary It may be connected to the tube 49B and the second capillary tube connecting flow path 56. The refrigerant control valve 52 may be configured as a three-way valve. The refrigerant control valve 52 has an open mode for guiding refrigerant to at least one of the first capillary tube 49A and the second capillary tube 49B, and the first capillary tube 49A and the second cap. The filler tube 49B may have a closed mode in which no refrigerant is supplied to the filler tube 49B. The refrigerant control valve 52 has a first capillary tube supply mode for guiding the refrigerant to the first capillary tube 49A in the open mode, and a second for guiding the refrigerant to the second capillary tube 49B. It can be one of the capillary tube feeding modes. The refrigerant guided to the refrigerant control valve 52 is guided to the first capillary tube 49A through the first capillary tube connecting passage 55 and expanded, or the second capillary tube connecting passage 56 is connected to the refrigerant. It can be guided through the second capillary tube 49B and expanded therethrough. The first capillary tube 49A and the second capillary tube 49B may be connected to the evaporator 50 by a lamination passage. The lamination passage includes a first capillary tube outlet passage 57 connected to the first capillary tube 49A, and a second capillary tube outlet passage 58 connected to the second capillary tube 49B. The first capillary tube outlet passage 57 and the second capillary tube outlet passage 58 may be formed by an evaporator inlet passage 59 connected to the evaporator 50. The refrigerant expanded in the expansion mechanism 48 may be guided to the evaporator 50 through the evaporator inlet passage 59. Expansion mechanism 48 may be installed to be located in the machine room or to be located in the cooling chamber (C).

The evaporator 50 may evaporate the refrigerant expanded in the expansion mechanism 48 by heat exchange with the inside of the refrigerator. The evaporator 50 may be connected to the compressor 40 and the compressor suction passage 41. Evaporator 50 may be installed to be located in the cooling chamber (C). The evaporator 50 may be installed in the cooling chamber C together with the blowing fan 6. The evaporator 50 may be installed in a smaller number than the storage chambers F and R to be cooled, and a single number may cool both the freezing chamber F and the refrigerating chamber R.

The blowing fan 6 may flow air in the freezing chamber F to the evaporator 50. The blowing fan 6 may blow air cooled by the evaporator 50 to the freezing chamber F. When the refrigerator further includes a refrigerating compartment (R), the blowing fan 6 may blow air cooled by the evaporator 50 to the freezing compartment (F) and the refrigerating compartment (R). The blowing fan 6 may function as an evaporating fan (or a freezer compartment fan) which blows air to the evaporator 50 to heat-exchange the refrigerant passing through the evaporator 50 with the air. The blowing fan 6 may be installed in the cooling chamber C together with the evaporator 50. The blowing fan 6 may include a motor that is a driving source and a blower that is rotated by the motor. The blowing fan 6 may be composed of a centrifugal fan, and may be composed of a sirocco fan or a turbo fan. The blower fan 6 can also be configured as an axial fan.

The condensation fan 8 may be installed in a machine room formed in the main body 2, and may suck air from the outside of the refrigerator into the machine room and blow the air into the condenser 44. The refrigerant passing through the condenser 44 may exchange heat with the air blown by the condensation fan 8. The condensation fan 8 can be driven together with the compressor 40. The condensation fan 8 can be stopped together with the compressor 40. The condensation fan 8 may include a motor and a fan rotated by the motor, and may include a centrifugal fan or an axial fan. The condensation fan 8 may be configured by the motor as a variable speed motor, and may vary the rotation speed of the fan. The condensation fan 8 can be driven at a first rotational speed or at a second rotational speed. The condensation fan 8 may be driven at a high wind volume when driven at a first rotational speed, and may be driven at a low wind volume when driven at a second rotational speed lower than the first rotational speed. The condensation fan 8 may be driven at a first rotational speed in the normal cooling mode, and may be driven at a second rotational speed lower than the first rotational speed in the dew condensation prevention mode. The condensation fan 8 may vary the rotation speed of the fan according to the voltage change. The air volume of the condensation fan 8 may be changed by the applied voltage, and the higher the voltage, the higher the air volume, and the lower the voltage, the lower the air volume.

The humidity sensor 10 detects humidity around a portion where dew is mainly formed in the main body 2, and may sense an external humidity of the freezing compartment F. The humidity sensor 10 may be installed in the freezer compartment door 21 or the refrigerating compartment door 22.

The refrigerator may include a controller 90 that controls the blower fan 6, the condensation fan 8, and the compressor 40 according to a user's input, a freezer compartment temperature TF, and a humidity. When the refrigerator includes the refrigerant control valve 52, the controller 90 may control the refrigerant control valve 52.

The refrigerator may include an input unit 92 that receives a user's command and a freezer compartment temperature sensor 94 that senses a temperature of the freezer compartment F.

 The input unit 92 may receive a power input, a desired temperature of a freezer compartment, a desired temperature of a refrigerator compartment, and the like, and may output a signal according to the input command to the controller 90.

The freezer compartment temperature sensor 94 may be installed in the freezer compartment F to output a signal according to the detected freezer compartment temperature to the controller 90. The freezer compartment temperature sensor 94 may detect a temperature of the freezer compartment F and output a signal according to the temperature detected by the controller 90, and the controller 90 may output a signal according to the signal output from the freezer compartment temperature sensor 94. It may be determined whether the freezer temperature TF is satisfied or dissatisfied.

 The controller 90 may determine satisfaction or dissatisfaction of the freezer compartment temperature TF based on the desired freezer compartment temperature. Here, when the user inputs a freezer desired temperature to the input unit 92, the freezer desired temperature may be a reference for determining whether the freezer desired temperature entered by the user is satisfied or dissatisfied with the freezer temperature (TF). If the desired freezer temperature is not inputted in 92), the initially set freezer temperature may be a criterion for determining the satisfaction or dissatisfaction of the freezer temperature (TF).

If the temperature detected by the freezer compartment temperature sensor 94 is lower than the freezer desired temperature, the controller 90 may determine that the freezer compartment temperature TF is satisfied, and the temperature detected by the freezer compartment temperature sensor 94 is the freezer compartment desired temperature. If higher, it can be determined that the freezer temperature TF is unsatisfactory.

The control unit 90 can determine the satisfaction and dissatisfaction of the freezer compartment temperature TF based on the upper limit temperature of the desired freezer compartment temperature and the lower limit temperature of the freezer compartment desired temperature. Here, the upper limit temperature of the desired temperature of the freezer compartment and the lower limit temperature of the desired temperature of the freezer compartment are the error temperatures of the desired temperature of the freezer compartment. The temperature may be a predetermined value higher than the freezer desired temperature, and the lower limit temperature of the freezer desired temperature may be a temperature lower than the desired freezer temperature such as -17.5 ° C or -18 ° C. If the temperature detected by the freezer compartment temperature sensor 94 is lower than the lower limit temperature of the desired freezer compartment temperature, the controller 90 may determine that the freezer compartment temperature TF is satisfied, and the temperature detected by the freezer compartment sensor 94 is If the freezer temperature is higher than the upper limit of the desired temperature, the freezer temperature TF may be determined to be unsatisfactory.

5 is a view showing an operation mode according to the freezer compartment temperature in one embodiment of a refrigerator according to the present invention.

The refrigerator may variably control the compressor 40 and the condensation fan 8 according to the freezer temperature TF and the humidity, and if the freezer temperature TF is unsatisfactory and the humidity is high, the hot line 46 may have a high temperature refrigerant. The compressor 40 and the condensation fan 8 can be controlled to flow, and if the freezer temperature TF is unsatisfactory and the humidity is low, the compressor 40 allows a relatively low temperature refrigerant to flow into the hot line 46. ) And the condensation fan 8 can be controlled.

The humidity sensor 10 may detect humidity and output the humidity to the controller 90. The freezer compartment temperature sensor 92 may detect the temperature of the freezer compartment F and output it to the controller 90. The control unit 90 controls the condenser fan 8 to operate the compressor 40 and the blowing fan 6 according to the value output from the freezer compartment temperature sensor 92 (freezer compartment temperature) and the value output from the humidity sensor 10 (humidity). Can be controlled together. The controller 90 may control the refrigerant control valve 52 together with the compressor 40, or control the refrigerant control valve 52 at a time difference from the compressor 40.

FIG. 5A shows the blower fan 6, the condensation fan 8, the compressor 40, and the refrigerant control valve 52 when the freezer temperature TF is unsatisfactory and the humidity sensed by the humidity sensor 10 is lower than the set value. Each operation is shown in FIG. 5 (b) shows the blower fan 6 and the condenser fan 8 when the freezer temperature TF is unsatisfactory and the humidity sensed by the humidity sensor 10 is higher than the set value. The operation of each of the compressor 40 and the refrigerant control valve 52 is shown.

If the freezer temperature TF is unsatisfactory and the humidity sensed by the humidity sensor 10 is less than the set value, as shown in FIG. 5A, first power is input to the compressor 40, and a condensation fan is provided. 8 may have a first mode driven at a first rotational speed.

Referring to FIG. 5A in more detail, when the freezer compartment temperature TF is unsatisfactory and the humidity sensed by the humidity sensor 10 is less than the set value, the refrigerator may be operated in the first mode. The refrigerator may start the compressor 40 in the first mode, start the blower fan 6, and start the condensation fan 8. The refrigerant control valve 52 may be in a closed state until the set time T elapses after the compressor 40 is started. The first mode may include a stabilization mode (A) and a general cooling mode (B). In the first mode, the stabilization mode A may be performed first, followed by the general cooling mode B. The refrigerator may be operated in a stabilization mode A in which the refrigerant control valve 52 is closed while the compressor 40, the blowing fan 6, and the condensation fan 8 are driven. In the stabilization mode A, the refrigerant of the evaporator 50 may be sucked into the compressor 40 and compressed, and the refrigerant compressed in the compressor 40 may be accumulated in the hot line 46 and the condenser 44.

The refrigerator may open the refrigerant control valve 52 after the stabilization mode A is set for a predetermined time, and the refrigerant control valve 52 of the compressor 40, the blowing fan 6, and the condensation fan 8 is opened. It can be operated in the normal cooling mode (B) which is driven in the in state. In the general cooling mode (C), the refrigerant passes through the compressor 40, the condenser 44, the hot line 46, the refrigerant control valve 52, the expansion mechanism 48, and the evaporator 50 sequentially, and then the compressor ( 40). The condensation fan 8 may be driven at a first rotational speed, and may blow air into the condenser 44 to help the refrigerant passing through the condenser 44 to heat exchange with the air to condense. The blowing fan 6 may blow air into the evaporator 50 to help the refrigerant passing through the evaporator 50 to exchange with the air to evaporate. The refrigerant may condense while passing through the condenser 44, may heat around the hot line 46 while passing through the hot line 46, and may evaporate while passing through the evaporator 50.

The refrigerator may be gradually lowered in the temperature of the freezer compartment F while operating in the normal cooling mode B, and the general cooling mode B may be operated for a long time when the freezer load is large, and may be performed for a short time when the freezer load is small. Can be. The refrigerant control valve 52 remains open while the normal cooling mode B is maintained, and the freezer compartment temperature TF can be lowered during the period of the normal cooling mode B.

The refrigerator may change the freezer compartment temperature TF to the satisfaction during the normal cooling mode B. The refrigerator may end the first mode if the freezer compartment temperature TF is satisfied during the normal cooling mode B. The refrigerator may stop the blower fan 6, the condensation fan 8, and the compressor 40 at the end of the first mode, and may close the refrigerant control valve 52. The refrigerator may be in a standby mode C after completion of the first mode, in which the refrigerant no longer flows in the standby mode C, and the air cooled by the evaporator 50 is no longer blown into the freezer compartment F. It doesn't work.

In the standby mode C, the temperature of the freezer compartment F may gradually increase, and the refrigerator may change the freezer compartment temperature TF unsatisfactory due to the load change during the standby mode C. In this case, when the humidity detected by the humidity sensor 10 is less than the set value, the refrigerator may be repeatedly operated in the first mode as illustrated in FIG. 5A and the humidity detected by the humidity sensor 10. If the humidity is above the set value, as shown in Fig. 5B, it is possible to operate in the second mode.

In the refrigerator, when the freezer temperature TF is unsatisfactory and the humidity sensed by the humidity sensor 10 is higher than or equal to a set value, as illustrated in FIG. 5B, a second power higher than the first power is input to the compressor 40. And a second mode in which the condensation fan 8 is driven at a second rotational speed lower than the first rotational speed.

Referring to FIG. 5B in more detail, when the freezer compartment temperature TF is unsatisfactory and the humidity sensed by the humidity sensor 10 is greater than or equal to the set value, the refrigerator may be operated in the second mode. The refrigerator can start the compressor 40 in the second mode, start the blower fan 6, and start the condensation fan 8. The refrigerant control valve 52 may be in a closed state until the set time T elapses after the compressor 40 is started. The refrigerator may include a stabilization mode A and a dew condensation prevention mode B ′ in operation of the second mode. The refrigerator may be operated in a stabilization mode A in which the refrigerant control valve 52 is closed while the compressor 40, the blowing fan 6, and the condensation fan 8 are driven. In the stabilization mode A, the refrigerant of the evaporator 50 may be sucked into the compressor 40 and compressed, and the refrigerant compressed in the compressor 40 may be accumulated in the hot line 46 and the condenser 44.

The refrigerator may open the refrigerant control valve 52 after the stabilization mode A is set for a predetermined time, and the compressor 40, the blowing fan 6, and the condensation fan 8 may be operated in the normal cooling mode of the first mode. B) may be operated in the dew condensation prevention mode (B ') for driving the refrigerant temperature flowing into the hot line 46 higher. In the dew condensation prevention mode (B '), the compressor 40 may be driven to discharge the refrigerant of a high temperature and high pressure than the normal cooling mode (B). In the dew preventing mode B ', a second power higher than the first power may be input to the compressor 40, and the compressor 40 may discharge the refrigerant having a higher temperature and higher pressure than the normal cooling mode B. have. In the dew condensation prevention mode (B '), the condensation fan (8) may be driven such that the refrigerant having a higher temperature than the normal cooling mode (B) flows out from the condenser (44). In the dew preventing mode B ', the condensation fan 8 may be driven at a second rotational speed lower than the first rotational speed, and the air volume of the air flowing into the condenser 44 is smaller than that of the general cooling mode B. In the condenser 44, a relatively high temperature refrigerant may flow out from the general cooling mode B. FIG.

In the dew condensation prevention mode (B '), the refrigerant is, like the normal cooling mode (B), the compressor 40, the condenser 44, the hot line 46, the refrigerant control valve 52, the expansion mechanism 48 and the evaporator After passing sequentially through 50 can be sucked into the compressor (40). In the dew condensation prevention mode (B '), the blowing fan 6 may blow air into the evaporator 50 to help the refrigerant passing through the evaporator 50 to exchange heat with the air to evaporate. The refrigerant may be condensed while passing through the condenser 44, and may be heated around the hot line 46 to a temperature higher than the normal cooling mode B while passing through the hot line 46, and then pass through the evaporator 50. Can be evaporated.

The refrigerator may cool the freezer compartment F as in the first mode while operating in the anti-dew mode B ', and the temperature of the freezer compartment F may gradually decrease during the anti-dew mode B'. In addition, the dew condensation prevention mode (B ') can be performed for a long time when the freezer compartment load is large, as in the general cooling mode (B), and may be performed for a short time when the freezer compartment load is small. The refrigerant control valve 52 is kept open while the anti-dew mode B 'is maintained, and the freezer compartment temperature TF can be lowered during the anti-dew mode B'.

The refrigerator may change the freezer compartment temperature TF to the satisfaction during the dew preventing mode B '. The refrigerator may end the second mode if the freezer compartment temperature TF is satisfied in the middle of the dew preventing mode B '. The refrigerator may stop the blower fan 6, the condensation fan 8, and the compressor 40 at the end of the second mode, and may close the refrigerant control valve 52. After the completion of the second mode, the refrigerator may be in the standby mode C, as in the case of the first mode, and in the standby mode C, the refrigerant no longer flows, and the freezer 50 no longer includes the evaporator 50. The air cooled by) is not blown.

In the standby mode C, the temperature of the freezer compartment F is gradually raised, and the refrigerator may change the freezer compartment temperature TF unsatisfactory due to the load change during the standby mode C. In this case, the refrigerator may be operated in the first mode when the detected humidity is lower than the set value, and the second mode may be repeated when the detected humidity is higher than the set value.

6 is a flowchart illustrating an embodiment of a control method of a refrigerator according to the present invention.

The operation method of the refrigerator according to the present invention includes the step of sensing the humidity by the humidity sensor 10. (S1) The humidity sensor 10 may detect an indoor temperature and output the detected temperature to the controller 90.

In the operation method of the refrigerator according to the present invention, if the freezer temperature TF is unsatisfactory and the detected humidity is less than the set humidity, the condenser fan 8 for blowing air to the condenser 44 is driven at a first rotational speed and the refrigerant When the first power is input to the compressor 40 to compress the pressure, the freezer temperature TF is unsatisfactory and the detected humidity is higher than the set humidity, the condensation fan 8 is driven at a second rotation speed lower than the first rotation speed. In addition, a second power higher than the first power is input to the compressor 40. (S2) (S3) (S4) (S5)

The refrigerator may be operated in a first mode in which the condensation fan 8 is driven at the first rotational speed and the first power is input to the compressor 40 when the freezer temperature TF is unsatisfactory and the detected humidity is less than the set humidity. (S2) (S3) (S4)

If the freezer temperature TF is unsatisfactory and the detected humidity is higher than or equal to the set humidity, the condenser fan 8 is driven at a second rotational speed lower than the first rotational speed, and the compressor 40 has a second higher than the first power. It may be operated in the second mode in which power is input. (S2) (S3) (S5)

In the method of operating the refrigerator, the first mode operation and the second mode operation may be selectively performed.

In the method of operating the refrigerator, the refrigerant control valve 52 may be opened when a predetermined time elapses after the first mode or the second mode is started. (S6)

The refrigerant control valve 52 may be opened while the refrigerator is operating in the first mode or while operating in the second mode, and when the refrigerant control valve 52 is opened, the refrigerant is stored in the compressor 40 and the condenser 44. After passing through the hot line 46, the refrigerant control valve 52 and the expansion mechanism 48 in sequence may be sucked into the compressor (40).

When the refrigerant control valve 52 is opened during the operation of the first mode, the refrigerant having a lower temperature and a lower pressure is introduced into the condenser 40 than the operation of the second mode, and air having a higher air volume is blown than the operation of the second mode. The low temperature low pressure refrigerant may pass through the hot line 46 rather than the second mode of operation.

When the refrigerant control valve 52 is opened during the operation of the first mode, the refrigerant having a relatively high temperature and high pressure flows into the condenser 40 than the operation of the first mode, and air having a lower air volume is blown than the operation of the first mode. The hot line 46 may pass a refrigerant having a high temperature and high pressure than the first mode of operation. During the second mode, dew condensation that may occur when the refrigerant passing through the hot line 46 heats the surroundings and the humidity is high may be minimized.

When the refrigerator is in operation of the first mode or in the second mode, the freezer compartment temperature TF may be changed to satisfaction, and the operation method of the refrigerator may be a compressor 40 and a blower (if the freezer compartment temperature TF is satisfied). 6) and stopping the condensation fan 8 and closing the refrigerant control valve 52 may be further included. (S7) (S8)

When the compressor 40 is stopped, the refrigerant does not circulate the compressor 40, the condenser 44, the hot line 46, the refrigerant control valve 52, and the expansion mechanism 48, and the air in the freezer compartment F evaporates. Not blown to 50, the refrigerator may be idle until the freezer temperature (TF) becomes unsatisfactory. Thereafter, the operation method of the refrigerator may be repeated.

2: body 4: refrigeration cycle unit
6: blowing fan 8: condensing fan
10: humidity sensor 40: compressor
44: condenser 46: hot line
48: expansion mechanism 50: evaporator
52: refrigerant control valve 90: control unit
94: freezer temperature sensor

Claims (2)

A main body in which a freezer compartment is formed;
A refrigeration cycle apparatus installed in the main body and including a compressor, a condenser, a hot line, an expansion mechanism, and an evaporator through which refrigerant passes sequentially;
A blowing fan circulating air in the freezing chamber to the evaporator and a freezing chamber;
A condensation fan for blowing air to the condenser;
Humidity sensor for detecting the humidity outside the freezer,
If the freezer temperature is unsatisfactory and the humidity detected by the humidity sensor is less than the set value, the first mode is input to the compressor, the first mode in which the condensation fan is driven at a first rotational speed,
If the freezer temperature is unsatisfactory and the humidity sensed by the humidity sensor is higher than or equal to the set value, the second mode in which the second power higher than the first power is input to the compressor and the condensation fan is driven at the second rotation speed lower than the first rotation speed. Having a refrigerator. Sensing, by the humidity sensor, the humidity outside the freezer compartment;
If the detected humidity is less than the set humidity and the freezer temperature is unsatisfactory, the condenser fan for blowing air to the condenser is driven at the first rotational speed and the first power is input to the compressor for compressing the refrigerant, and the detected humidity is set to the humidity. And if the freezer temperature is unsatisfactory, the condensation fan is driven at a second rotation speed lower than the first rotation speed and a second power higher than the first power is input to the compressor.

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