KR100532902B1 - Refrigerator - Google Patents

Abstract

An object of the present invention is to provide a refrigerator which can reduce the amount of current supplied to a heater or close the heater itself and defrost the evaporator.

And a fan for supplying cold air to the first cold air passage and the second cold air passage, first cold air control means for opening and closing the first cold air passage, and second cold air control means for opening and closing the second cold air passage, The opening and closing of the 1st cold air passage and the opening and closing of the 2nd cold air passage are made into the opposite opening and closing state, and after a compressor stops, the said 1st cold air passage is opened and a control apparatus which rotates a fan is provided.

Description

Refrigerator {REFRIGERATOR}

The present invention relates to a refrigerator.

The conventional refrigerator has a refrigerating cycle shown in FIG. 11, and this refrigeration cycle is explained. The refrigerant compressed by the compressor 1 flows into the condenser 2 to perform heat exchange, and the decompressor 3 The pressure is lowered to evaporate by the evaporator 4, and at the same time, the heat of the air transferred from the fan 5 is taken away to generate cold air.

The cold air generated by the evaporator 4 is transferred to the freezer compartment (F in the figure) and the refrigerating compartment (R in the figure), but the damper 6 for the refrigerating compartment is installed in a passage for transferring cold air from the evaporator 4 to the refrigerating compartment. In addition, the supply of cold air to the refrigerating chamber can be controlled. In addition, since the frost is attached to the evaporator 4, when the running time of the compressor is integrated and the integrated value is equal to or higher than the set value, the heater 9 is energized to remove the frost.

However, since the refrigerator shown in Fig. 11 conducts electricity to the heater 9 each time defrosting is performed, there is a problem that it is difficult to consume a large amount of power and reduce the amount of power consumed in the entire refrigerator.

This invention is made | formed in order to solve the said problem, and an object of this invention is to provide the refrigerator which can reduce the electricity supply to a heater, or closes the heater itself, and can remove frost of an evaporator.

The above object is to provide a compressor and an evaporator, the evaporator chamber for generating cold air to be supplied to the refrigerating chamber and the freezing chamber, a first cold air passage communicating with the evaporator chamber for supplying cold air to the refrigerating chamber, and in communication with the evaporator chamber. A second cold air passage for supplying cold air to a freezer compartment, a fan for supplying cold air to the first cold passage and the second cold air passage, first cold air control means for opening and closing the first cold air passage, and the second cold air And a second cold air control means for opening and closing the passage, and opening and closing the first cold air passage and opening and closing the second cold air passage to the opposite opening and closing state, and after the compressor stops, opens the first cold air passage to open the fan. It is achieved by having a control device that rotates it. At this time, it is preferable that the control device rotates the fan by opening the first cold air passage between a predetermined time after the compressor stops or after the compressor stops until the refrigerating chamber or the freezing chamber reaches a predetermined temperature or more. Do.

Moreover, when the internal temperature of the refrigerator compartment becomes more than the said refrigerator compartment upper limit set temperature, it is equipped with the memory means which memorizes the refrigerator compartment upper limit set temperature, A 1st cold air | control means is based on a 1st cold air | control means, regardless of the opening / closing state. It is preferable to have a control apparatus which makes a cold air path open.

In addition, a storage means for storing the external air temperature setting temperature is provided, and when the external air temperature becomes equal to or higher than the external air temperature setting temperature, the second cold air passage means is controlled by the second cold air control means regardless of the opening / closing state of the first cold air control means. It is desirable to have a control device in which the state is opened.

1 is a side cross-sectional view of a refrigerator showing an embodiment of the present invention. The refrigerator body 10 includes an outer box 11, an inner box 12, and a heat insulating material 13 disposed between the outer box 11 and the inner box 12, and the inner box 12 is The refrigerating chamber 14, the vegetable chamber 15, and the freezing chamber 16 are formed from the upper part.

The compressor 18 is provided between the freezer compartment 16 and the back plate 17 of the refrigerator main body 10, and the evaporator 19 is provided above this compressor 18. As shown in FIG. Between the vegetable chamber 15 and the back plate 17 of the refrigerator main body 10, the fan 20 which circulates cold air is provided. Between the refrigerating chamber 14 and the back plate 17 of the refrigerator main body 10, a refrigerating chamber cold air passage 21 for supplying cold air to the refrigerating chamber 14 is provided, and cold air circulated by the fan 20. Is introduced into the refrigerating chamber cold air passage (21) through the refrigerating chamber damper (22).

A freezer compartment damper 23 is provided between the freezer compartment 16 and the evaporator 19, and the cold air passing through the freezer compartment damper 23 is discharged from the freezer outlet air outlet 24 for the freezer compartment. Return to the fan 20 from 25).

FIG. 2 is a sectional view of the refrigerator main body 10 shown in FIG. 1 seen from the front, and FIG. 3 is a partially enlarged view of FIG. 2 and 3, the flow of cold air will be described below. The flow of cold air which cools the refrigerating compartment 14 is cooled by the return of the return air from the refrigerating compartment 14 to the evaporator 19 from the refrigerating compartment return air passage 26 by the rotation of the fan 20. 22) flows to the cold air passage 21 for the refrigerating compartment. The cold air that has flowed into the cold air vent passage 21 for the cold compartment is discharged into the cold compartment 14 from the cold air outlet 27 for the cold compartment, which is provided in plural so as to uniformly cool the entire cold compartment 14, and the inside of the cold compartment 14 To cool. The cold air which cooled the refrigerating chamber 14 flows into the vegetable chamber 15 after that, and flows to the refrigerating chamber return air path 26 after cooling the vegetable chamber 15 repeatedly.

The flow of cold air which cools the freezer compartment 16 is cooled by the return of the return air from the freezer compartment 16 to the evaporator 19 from the freezer compartment return air passage 25 by the rotation of the fan 20. 23, 23 flows to the cold air passage 28 for the freezer compartment. In addition, two freezer dampers 23 are provided in this embodiment because the freezer compartment 16 is partitioned from the center to the left and right in the present embodiment, so that cold air can be supplied to the freezer compartments on the left and right sides, respectively. have. The cold air that has flowed into the freezer cooling air passage 28 is discharged from the freezer cold air outlet 24 (see FIG. 1) to the freezer compartment 16 to cool the inside of the freezer compartment 16. The cold air which cooled the freezer compartment 16 repeats the flow movement to the return air passage 25 for a freezer compartment after that.

4 is a schematic view showing a refrigeration cycle of the refrigerator shown in FIG. The refrigerant compressed by the compressor 18 flows into the condenser 30 to perform heat exchange, and the pressure is reduced by the pressure reducer 29 to vaporize in the evaporator 19, and at the same time, It takes away heat and creates cold air.

The cold air generated in the evaporator 19 is transferred to the freezer compartment (F1, F2 in the drawing) and the refrigerating chamber (R in the figure), but the damper 22 for the refrigerating compartment is installed in the passage for transferring the cold air from the evaporator 19 to the refrigerating compartment. Therefore, the amount of cold air supplied to the refrigerating chamber R can be controlled. In addition, a passage for transferring cold air from the evaporator 19 to the freezer compartments F1 and F2 is provided with a damper 23 for a freezer compartment so that the amount of cold air supplied to the freezer compartments F1 and F2 can be controlled.

Fig. 5 shows fan rotation (ON) and stop (OFF), opening and closing of the freezer damper, opening and closing of the damper for the refrigerating compartment, turning on and off the compressor (ON) and turning off (OFF), the internal temperature of the freezer compartment, and the internal temperature of the refrigerating compartment. One time chart. Hereinafter, the control of the control device will be described with reference to FIG. 5. As shown in Fig. 5, in this embodiment, the lower limit set temperature of the refrigerating compartment, the upper limit and the lower limit set temperature of the refrigerating compartment are stored in advance in the storage device, and the internal temperature of the refrigerator is measured by a temperature sensor installed in the refrigerating compartment and the freezing compartment, respectively. According to the measurement result, the control device controls the start and stop of the compressor, opening and closing of the damper for the refrigerating chamber, opening and closing of the damper for the freezer compartment, and rotation and stop of the fan. In addition, the refrigerator compartment damper and the freezer compartment damper are in a state in which the opening and closing state is reversed. When the refrigerator compartment damper is open, the freezer damper is closed. When the refrigerator compartment damper is closed, the freezer damper is opened.

In this embodiment, the inverting / closing states of the refrigerator compartment damper and the freezer compartment damper are separately cooled by the evaporator separately without mixing the return air in the refrigerator compartment and the return air in the freezer compartment as much as possible. I'm doing it. That is, the air temperature in the refrigerator compartment is higher than the air temperature in the freezer compartment, and the mixed air of two air is also higher than the air temperature in the freezer compartment. In order to cool such mixed air into the freezer, it is necessary to use a cooler at a temperature lower than the temperature of the evaporator used for cooling separately without mixing as much as possible, so that a large amount of power consumption is required. The cost of manufacturing itself is also high. This is because the temperature difference between the return air temperature and the air temperature after cooling is larger when there is a lot of mixed air.

When the refrigerator compartment operates the compressor to rotate the fan and opens the refrigerator compartment damper, the internal temperature of the refrigerator gradually decreases, and eventually reaches point A in the drawing. A point is the lower limit set temperature of a refrigerating compartment, and stops a compressor so that the stored goods in a refrigerating compartment may not be frozen. The evaporator is gradually defrosted when the compressor stops, and the air that has been moistened by the vaporized water of the frost and the evaporated water of the defrost water is open to the refrigerating chamber and the vegetable chamber, so that the air humidified by the refrigeration chamber is opened. To prevent drying of the stored matter.

In the refrigerating chamber, since the compressor is stopped, the temperature gradually rises in a high humidity state, and eventually reaches the point B. Point B is a point where the temperature in the refrigerator compartment becomes higher than the lower limit set temperature of the refrigerator compartment, where the refrigerator damper is closed and the freezer damper is opened, and high humidity air flows into the refrigerator compartment to raise the temperature inside the refrigerator compartment. The fan is stopped to suppress the flow of high humidity air.

Since the freezing chamber does not introduce cold air into the refrigerator, the temperature in the refrigerator gradually rises, and eventually reaches point C in the drawing. The point C is the upper limit set temperature of the freezer compartment, and it is necessary to cool the freezer compartment as soon as possible, so that the operation of the compressor is started, the fan is rotated, the cold air is supplied to the freezer compartment, and the freezer compartment temperature is rapidly lowered.

The freezer reaches the point D soon after the internal temperature continues to fall. The point D is the lower limit set temperature of the freezer compartment. Since the freezer compartment does not need to be chilled anymore, the freezer compartment damper is closed and the refrigerator compartment damper is opened to supply cold air to the refrigerator compartment. After that, the same control is performed when passing through A point, B point, C point, and D point in order to defrost the evaporator and to make the refrigerating chamber and the vegetable chamber high.

The refrigerator performing such control does not need to conduct electricity to the heater every time the defrost of the evaporator is defrosted, thereby eliminating the need for a heater or reducing the amount of electricity to the heater. In addition, the refrigerating chamber and the vegetable compartment can be kept at high humidity by using moisture by defrosting, which prevents the drying of the stored product and maintains the freshness for a longer time. In addition, since the opening and closing states of the refrigerator compartment damper and the freezer compartment damper are reversed, the temperature of the evaporator can be set higher than in the related art.

FIG. 6 is a time chart for controlling different from FIG. 5. In FIG. 5, the lower limit set temperature of the refrigerating compartment, the upper limit and the lower limit set temperature of the refrigerating compartment are stored in the storage device in advance, and control is performed. However, in FIG. 6, the upper limit set temperature of the refrigerating compartment is also stored.

In the drawings, points A, B, C, and D have the same control as those described with reference to Fig. 5, so that description thereof will be omitted and the point E will be described in detail. Point E is a point where the internal temperature of the refrigerating compartment becomes higher than the upper limit set temperature of the refrigerating compartment previously stored, and it is necessary to cool the refrigerating compartment promptly. Therefore, when the internal temperature of the refrigerator compartment reaches point E, the damper for a refrigerator compartment becomes an open state regardless of the opening / closing state of the freezer compartment damper, and forcibly introduces cold air into the refrigerator compartment. After that, control at points A, B, C, and D is continued, and when the temperature inside the refrigerator compartment reaches point E, the damper for the refrigerator compartment is opened regardless of whether the freezer damper is opened or closed. do.

In the control shown in Fig. 6, when the internal temperature of the refrigerating chamber becomes equal to or higher than the upper limit set temperature of the refrigerating compartment, the refrigerator is forcibly fed to the refrigerating chamber by opening the refrigerating chamber damper regardless of the open / closed state of the freezer damper. With the effects described above, the refrigerating compartment can be kept fresh for a long time with less damage.

FIG. 7 is a time chart for performing control different from FIG. 5 and FIG. In the control of the present embodiment, in addition to the lower limit set temperature of the refrigerating compartment, the upper limit and the lower limit set temperature of the refrigerating compartment used in FIG. The temperature inside and outside the air is measured, and the control device controls the start and stop of the compressor, the opening and closing of the refrigerator compartment damper, the opening and closing of the freezer compartment damper, and the rotation and stop of the fan according to the measurement result.

In this control, two different types of control are performed depending on whether the outside air temperature is above or below the outside air temperature setting temperature. If the outside air temperature is below the outside air temperature, the same control as shown in Fig. 5 is obtained by A point, It is performed at points B, C, and D (the description is the same as that in Fig. 5, and thus the description is omitted). When the outside air temperature becomes higher than the outside air temperature setting temperature at point X, the refrigerator compartment damper is opened at point D, and at the same time, the open state is maintained without closing the freezer compartment damper. After that, when the inside temperature of the refrigerator compartment reaches A, the compressor stops operation to close the freezer compartment damper to prevent excessive cooling of the refrigerator compartment, and this state until the inside temperature of the refrigerator compartment reaches point B. Keep it. When the compressor is stopped, a force that tries to relieve the pressure difference between the evaporator and the condenser acts, so that the temperature of the evaporator is gradually raised even if no special action is taken, and the frost attached to the evaporator is removed. Then, by rotating the pan during defrosting, the refrigerating compartment and the vegetable compartment can keep the freshness long by preventing the drying of the stored product due to the inflow of high humidity air.

When the control shown in Fig. 7 is performed, even if the outside temperature rises in the summer with the effect described in Fig. 5, the stored product in the freezer compartment can be stored at the set temperature, thereby preserving the quality without compromising quality.

8 to 10 are time charts showing the relationship between the temperatures in the refrigerator compartment and the freezer compartment and the humidity in the refrigerator compartment. FIG. 8 is a time chart of the conventional refrigerator shown in FIG. 11, and the state change is made into an OFF state, an RF state, and an F state which will be described later. The OFF state shows a state in which the compressor is stopped, and cold air is not supplied to the refrigerating chamber or the freezing chamber, so that the temperature inside the refrigerator rises in both the refrigerating chamber and the freezing chamber. The RF state indicates a state in which the compressor is operated to open the refrigerating chamber damper, and cold air is supplied to both the refrigerating chamber and the freezing chamber to simultaneously lower the temperature in the refrigerator. F state shows the state which operated the compressor and closed the refrigerator compartment damper, supplying cold air only to a freezer compartment, the temperature inside the refrigerator compartment rises, and the temperature inside the refrigerator compartment falls.

The high humidity inside the refrigerating compartment drops rapidly in the RF state where cold air is supplied to the refrigerating compartment. This is because, when the air in the air passes through the evaporator, heat is exchanged between the air in the air and the evaporator to lower the temperature of the air in the air, and the moisture in the air is attached to the evaporator as frost, resulting in dry cold air. In the OFF state and the F state, dry cold air is not supplied to the refrigerating chamber, and moisture in the storage is gradually evaporated and dispersed, so that the humidity in the high rises, but the humidity rises to about 70%, and the average dry state is about 38%. to be.

9 illustrates a time chart of the refrigerator of the present invention, and the state change is described later in the R state, the F state, the a state, and the OFF state. In the R state, the compressor is operated to open the refrigerator compartment damper, the freezer compartment damper is closed, and the cold air is introduced into the refrigerator compartment. The temperature inside the refrigerator is lowered in the refrigerating chamber into which cold air flows and rises in the freezing chamber in which cold air is not introduced. In the F state, the compressor is operated to close the refrigerating chamber damper, and the freezing chamber damper is opened to introduce cold air into the freezing chamber. The temperature inside the refrigerator rises in the refrigerating chamber where cold air does not flow in, and falls in the freezing chamber in which cold air flows. In the a state, the compressor is stopped to open the refrigerating chamber damper, the freezing chamber damper is closed, and the fan is rotated to circulate air in the refrigerator. In this state, defrost of the evaporator is performed, and the generated high humidity air flows into the refrigerating chamber. Since the temperature in the refrigerator stops the compressor, the temperature rises in both the refrigerating chamber and the freezing chamber. In the OFF state, the compressor is stopped to close the refrigerator compartment damper, the freezer compartment damper is opened, and the fan for circulating air in the refrigerator is also stopped. Since the temperature in the refrigerator stops the compressor, the temperature rises in both the refrigerating chamber and the freezing chamber.

The humidity inside the fridge drops rapidly in the R state where dry cold air enters the fridge, but in the F state, the evaporation and dispersion of the water contained in the storage gradually increase, so that the humidity in the fridge rises slowly, and in the a state, the high humidity air is in the fridge As it flows in, it rises sharply to about 82%. In OFF, high humidity air inflow is stopped, so that the humidity rises again and rises to about 85%. The average value of high humidity is about 47%. As apparent from the time chart shown in Fig. 9, in this embodiment, the humidity is higher than that of the conventional refrigerator shown in Fig. 8, and the freshness can be kept longer by preventing drying of the stored product. This is achieved by introducing the air, which has been moistened by the moisture released into the air upon defrosting, into the refrigerating chamber by rotating the fan.

Fig. 10 shows time charts of humidity and temperature when the control shown in Fig. 5 is performed. The state changes are described later in the R state, the a state, the OFF state, and the F state, which are repeated later. In the R state, the compressor is operated to open the refrigerating chamber damper, and the freezer compartment damper is closed to introduce cold air into the refrigerating chamber. The temperature inside the refrigerator is lowered in the refrigerating chamber into which cold air flows and rises in the freezing chamber in which cold air is not introduced. In the a state, the compressor is stopped to open the refrigerating chamber damper, the freezing chamber damper is closed, and the fan is rotated to circulate air in the refrigerator. In this state, defrost of the evaporator is performed, and the generated high humidity air flows into the refrigerating chamber. Since the temperature in the refrigerator stops the compressor, the temperature rises in both the refrigerating chamber and the freezing chamber. In the OFF state, the compressor is stopped to close the refrigerator compartment damper, and the freezer compartment damper is opened to stop the fan that circulates the air in the refrigerator. Since the temperature in the refrigerator stops the compressor, the temperature rises in both the refrigerating chamber and the freezing chamber. In the F state, the compressor is operated to close the refrigerating chamber damper, and the freezing chamber damper is opened to introduce cold air into the freezing chamber. The temperature inside the refrigerator rises in the refrigerating chamber where cold air does not flow in, and falls in the freezing chamber in which cold air flows.

The high humidity in the refrigerating compartment drops sharply in the R state where dry cold air flows into the refrigerating compartment. However, in the a state, the humidity of the refrigerating compartment rapidly rises to about 84% since the high humidity air enters the refrigerating compartment. Thereafter, in both the OFF state and the F state, the moisture contained in the stored material is gradually evaporated and dispersed, so that the humidity inside the high rises gradually and rises to 95%. The average value of high humidity is 78%. In the control shown in Fig. 10, the high average humidity in the refrigerator is in a state of rapidly raising the humidity in the refrigerator immediately after the R state of rapidly decreasing the humidity in the refrigerator compartment, and the humidity is still high thereafter. This is due to the OFF state and the F state which raise the humidity further. In the refrigerator of the present embodiment, the average humidity is higher than that of the conventional refrigerator shown in FIG. 8, and high average humidity can be achieved even in comparison with the other embodiments of the present invention shown in FIG.

According to the present invention, it is possible to provide a refrigerator which can reduce the amount of energization to the heater or close the heater itself to defrost the evaporator.

1 is a side cross-sectional view of a refrigerator showing an embodiment of the present invention.

FIG. 2 is a sectional view seen from the front of the refrigerator shown in FIG. 1; FIG.

3 is a partially enlarged view of the refrigerator shown in FIG. 2;

4 is a schematic diagram of a refrigeration cycle of the refrigerator shown in FIG. 1;

Fig. 5 is a time chart of a control state showing an embodiment of the present invention.

6 is a time chart of a control state, showing another embodiment of the present invention;

7 is a time chart of a control state, showing still another embodiment of the present invention;

FIG. 8 is a time chart showing changes in humidity of the conventional refrigerator shown in FIG.

9 is a time chart showing the change in humidity in the refrigerator of the present invention.

FIG. 10 is a time chart showing changes in humidity in the high temperature in the control shown in FIG. 5; FIG.

11 is a view showing a schematic refrigeration cycle of a conventional refrigerator.

<Explanation of symbols for the main parts of the drawings>

1, 18: compressor

2, 30: condenser

3, 29: pressure reducer

4, 19: evaporator

5, 20: fan

6, 22: damper for cold room

9: heater

10: refrigerator body

11: outer box

12: inner box

13: heat insulation

14: refrigerator

15: vegetable room

16: freezer

17: back plate

21: cold air vent for the refrigerator

23: damper for freezer

24: cold air outlet for freezer

25: return air path for freezer

26: return air for the refrigerator

27: cold air outlet for refrigerating chamber

28: cold air vent for freezer

Claims (4)

A compressor and an evaporator are installed to generate cold air to be supplied to the refrigerating chamber and the freezing chamber, a first cold air passage communicating with the evaporator chamber to supply cold air to the refrigerating chamber, and communicating with the evaporator chamber to supply cold air to the freezing chamber. A second cold air passage, a fan for supplying cold air to the first cold air passage and the second cold air passage, first cold air control means for opening and closing the first cold air passage, and a second opening and closing of the second cold air passage. And a second cool air control means, wherein the opening and closing of the first cold air passage and the opening and closing of the second cold air passage are made to be in an open and closed state, and after the compressor is stopped, the control device which opens the first cold air passage to rotate the fan. Refrigerator comprising a. The fan of claim 1, wherein the control device rotates the fan by opening the first cold air passage between a predetermined time after the compressor stops or after the compressor stops until the refrigerating chamber or the freezing chamber becomes above a preset temperature. Refrigerator characterized in that. The storage means according to claim 1 or 2, further comprising: a storage means for storing the refrigerating compartment upper limit set temperature, and when the internal temperature of the refrigerating compartment becomes equal to or higher than the refrigerating compartment upper limit set temperature, the first cold-regarding first or second state regardless of opening / closing state of the control unit; The refrigerator provided with the control apparatus which makes a 1st cold air path open state by cold air | control control means. The second cold air according to claim 1 or 2, further comprising a storage means for storing the external air temperature setting temperature, and when the external air temperature is equal to or higher than the external air temperature setting temperature, regardless of the open / closed state of the first cold air control means. The refrigerator provided with the control apparatus which makes a 2nd cold air path open state by a control means.