KR100597302B1 - Refrigerator - Google Patents

Abstract

A refrigerator is provided to easily carry out conversion between direct and indirect cooling modes for a refrigerating compartment via natural convection of chilled air from a freezer compartment and structural and electrical connection of a duct and a blower unit of a refrigerating compartment. A refrigerator includes a main body defined with a freezer compartment(F) and a refrigerating compartment(R). A freezer compartment evaporator(60a) is mounted to the freezer compartment for directly cooling the freezer compartment. A refrigerating compartment evaporator(60b) is mounted to an inner wall of the refrigerating compartment for cooling the refrigerating compartment. A refrigerating cycle is formed of the evaporators, a compressor(56), a condenser(58) and an expansion unit for carrying out cooling operation around the evaporators via circulation of refrigerant. A duct(70) is mounted to the inner wall of the refrigerating compartment, which directly contacts the refrigerating compartment evaporator, and forms a vertical chilled air circulation path(A) between an inlet and a plurality of chilled air distribution holes(70h). A blower unit(80) is mounted to the inlet of the duct for blowing air circulating the refrigerating compartment via the chilled air circulation path. A controller(64) controls operations of various component parts and controls the chilled air of the refrigerating compartment for natural convection or forcible convection.

Description

Refrigerator {REFRIGERATOR}

The present invention relates to a refrigerator which allows refrigeration to be performed while cold is naturally convection in the freezing compartment and at the same time, while cold is selectively convection or forced convection in the refrigerating compartment.

In general, refrigerators generate cold air through heat exchange with cold refrigerants that pass through the freezing cycle, and as these colds circulate in the freezer and refrigerating chambers, they freeze and store foods at low temperatures to prevent deterioration and freshness of foods. It is a device to keep it for a long time.

In general, the refrigerator is divided into a direct cooling method and an indirect cooling method according to the cooling method. The refrigerator of the direct cooling method is configured such that an evaporator is installed on the inner wall of the freezer compartment and the refrigerating compartment. And the refrigerator while cooling the refrigerator compartment, the refrigerator of the indirect cooling method is configured such that the evaporator is installed on the inner wall of the freezer compartment and at the same time the fan is installed on the cold air circulation flow path, the cold air generated around the evaporator is forced by the fan and the freezer compartment And the refrigerating compartment is cooled.

1 is a side cross-sectional view showing a direct-cooling refrigerator according to the prior art.

In the conventional direct-cooling refrigerator, as illustrated in FIG. 1, the freezer compartment F and the refrigerating compartment R are formed on the inside of the refrigerator main body 2 including the outer case 2a and the inner cases 2b and 2c forming the exterior. It is formed to be divided into lower and the front is open, and the freezer door 4a and the refrigerating compartment door 4b are hingedly connected to the front of the refrigerator main body 2 so as to be opened and closed, and the inner case 2b of the refrigerator main body. 2c) The inner wall is configured to have a refrigeration cycle including evaporators 10a and 10b.

Of course, the refrigeration cycle is composed of a compressor (6), a condenser (8), a capillary tube (not shown), evaporators (10a, 10b) so that the refrigerant can be compressed, condensed, expanded, evaporated while circulating.

Here, the evaporators 10a and 10b are installed in such a manner that most of the evaporators 10a and 10b are in close contact with the inner wall of the inner case 2b of the freezer compartment and are partially embedded in the inner wall of the inner case 2b of the refrigerator compartment at a predetermined interval. A separate temperature sensor (not shown) is configured in the 10a and 10b, and the heat insulating material 12 is provided between the outer case 2a and the inner case 2b and 2c with the evaporators 10a and 10b embedded therein. ) Is manufactured to be foam molded.

In addition, the refrigerator as described above is configured to include a control unit (not shown), the control unit is input from the outside of the set refrigeration temperature (Tf ₀ ) and the set refrigeration temperature (Tr ₀ ) at the same time from the evaporator (10a) from the temperature sensor After inputting and determining the temperature information of, 10b), the operation of the compressor 6 is adjusted according to the determination result.

On the other hand, a drain pipe 14 for guiding the condensed water formed on the inner cases 2b and 2c of the refrigerating chamber to the outside is installed at the lower side of the refrigerating chamber R, and the condensed water flowing along the drain pipe 14 is provided. The collected drain pan 16 is installed.

Therefore, referring to the operation of the refrigerator configured as described above, the operation of the compressor 6 is controlled according to the set refrigeration temperature Tf ₀ and the set refrigeration temperature Tr ₀ input from the controller, but the compressor 6 As the refrigerant is circulated along the compressor (6), condenser (8), capillary, evaporator (10a, 10b), the compression, condensation, expansion, evaporation, low temperature low pressure passing through the evaporator (10a, 10b) The liquid refrigerant of the heat exchange action with the air in the freezer compartment (F) and the refrigerating chamber (R) is a cold air is generated, the cold air generated in this way by the convection naturally in the freezer compartment (F) and the refrigerating chamber (R) State is maintained.

In this case, the refrigerating chamber R maintains a relatively high internal temperature compared to the freezing chamber F, while the evaporator is built into the inner wall of the inner case 2c of the refrigerating chamber, so the frost is formed on the surface of the inner case 2c of the refrigerating chamber. Is formed.

However, when a defrosting operation is performed to stop the compressor 6 in order to remove the frost generated in this way, the frost melts and flows down the surface of the inner case 2c of the refrigerating compartment along the drain pipe 14. It is discharged to the drain pan 16.

The direct-cooling refrigerator configured as described above reduces heat exchange efficiency by forming frost on the side of the refrigerating chamber (R), or has high humidity as the frost on the side of the refrigerating chamber (R) melts, and condensate contacts foods in the food compartment, causing hygiene problems. have.

In addition, the direct-cooling refrigerator configured as described above has a problem that it cannot be applied to a refrigerator having a large capacity because cold air is blown only by natural convection in the freezing compartment F and the refrigerating chamber R.

Accordingly, an object of the present invention is to provide a refrigerator which indirectly cools a refrigerating compartment in order to directly cool the freezing compartment to maintain a uniform low temperature state and to prevent frost and condensate from forming in the refrigerating compartment.

Another object of the present invention is to provide a refrigerator for forming a cold air circulation passage having a high thermal insulation effect around a refrigerator compartment side evaporator in order to prevent frost and condensed water from forming in the refrigerator compartment.

In addition, an object of the present invention is to provide a refrigerator which can easily implement a refrigerating chamber of the indirect cooling method selectively in the refrigerator having a direct cooling freezer and a refrigerator compartment.

In addition, an object of the present invention is to provide a refrigerator that minimizes cold air loss by sucking relatively high temperature air circulated in the refrigerating compartment from the top of the refrigerating compartment and exchanging heat, and then allowing relatively low temperature air to be injected from the upper side to the lower side of the refrigerating compartment. do.

In one embodiment of the present invention for achieving the above object, a refrigerator body formed so that a freezer compartment and a refrigerating compartment are partitioned from each other, a freezer compartment side evaporator disposed on the freezer compartment side to directly cool the freezer compartment, and arranged on the inner wall of the refrigerating compartment to cool the refrigerating compartment. A refrigerating cycle configured to include a refrigerator compartment side evaporator, a compressor, a condenser, and an expansion unit connected to the freezer compartment side evaporator and the refrigerator compartment side evaporator so that a refrigerant is circulated and a cooling operation is performed around the evaporators; A duct formed on the inner wall of the refrigerating chamber in direct contact with the actual evaporator, and having a suction port formed at one end to form a cold air circulation path in the vertical direction, and having a plurality of cold air distribution holes for distributing and supplying cold air to the refrigerating chamber side; Installed on the inlet side to circulate the refrigerating compartment And a blower for blowing air through the cold air circulation passage, and a control unit for controlling cold or natural convection in the refrigerating chamber by adjusting operations of various components including the compressor and the blower. It provides a refrigerator.

Here, the freezer compartment evaporator is preferably installed so as to be built into the shelf partitioning the storage space in the freezer compartment, the refrigerator compartment side evaporator is built so as to be in direct contact with only a portion of the inner wall of the refrigerating compartment, the refrigerator compartment side evaporator A cold air circulation groove is formed in the portion to be embedded in the longitudinal direction in the vertical direction, and the duct is installed in the cold air circulation groove to be coplanar with the inner wall of the refrigerating chamber.

In this case, the inlet is formed at the upper end of the duct so that cold air can flow from the upper end to the lower end of the cold air circulation passage, and a plurality of cold air distribution holes are formed at predetermined intervals below the inlet. It is preferable to be provided at the suction port side of the duct.

In addition, it is preferable that the drain pipe is connected to the lower end of the duct so that the condensed water flowing down the cold air circulation passage can be guided out.

In addition, the duct is provided with a heat insulating material on the inner side of the cold air flow passage in contact with the cold air flow passage in order to prevent the dew from forming on the outer surface in contact with the refrigerating chamber side, the frost on the inner wall of the cold air circulation passage thickly formed on the upper side. Even if the heat insulating material is installed so that the thickness becomes thinner from the bottom to the top so as to secure a predetermined flow path through which cold air can flow, or if the frost forms thickly on the top side of the refrigerating chamber side of the cold circulation passage. The cold air circulation groove is preferably formed to be inclined from the lower end to the upper end so as to secure a predetermined flow path space through which cold air can flow.

Next, the cold air distribution holes of the duct are preferably formed larger from the upper end to the lower end of the duct so that the cold air can be uniformly distributed.

Next, it is preferable that the blower includes a blower fan and a motor for blowing cold air, and a fan housing installed at the inlet of the duct so that the blower fan is built therein.

At this time, the fan housing is formed with a protrusion for securing space protruding a predetermined length from the front end to ensure a predetermined flow space at the front end, the length of the protrusion is included in the range of 15 to 25% of the diameter of the blowing fan. The fan housing is provided with a space securing cover protruding a predetermined length from the front end so as to secure a predetermined flow space at the front end, and a plurality of suction ports are formed in the space securing cover to secure the space. The protruding length of the cover is more preferably configured to be included in the 10 to 50% range of the diameter of the blowing fan.

Next, when the temperature of the refrigerating compartment is more than the maximum temperature of the set temperature range, the controller operates the compressor and makes the refrigerating operation while rotating the blower fan at a predetermined first rotational speed, and the temperature of the refrigerating compartment is When the temperature is equal to or lower than the minimum temperature of the set temperature range, it is preferable to stop the compressor and to perform the defrosting operation while rotating the blower fan at a predetermined second rotation speed faster than the first rotation speed.

On the other hand, in another aspect of the present invention, the refrigerator body and the freezer compartment formed so that the freezer compartment and the refrigerating compartment are partitioned from each other, a freezer compartment side evaporator disposed on the freezer compartment side to directly cool the freezer compartment, and a refrigerator compartment side evaporator arranged on the inner wall of the refrigerator compartment to cool the refrigerator compartment. And a refrigeration cycle configured to include a compressor, a condenser, and an expansion means connected to the freezer compartment side evaporator and the refrigerator compartment side evaporator so that a refrigerant is circulated so that a cooling action is performed around the evaporators, and the refrigerator compartment side evaporator is in direct contact with the refrigerator compartment side evaporator. It is detachably installed to form a cold air circulation passage in the up and down direction on the inner wall of the refrigerating chamber is cold air circulation means for circulating the cold air generated on the cold air circulation path to the cold compartment, and installed between the cold chamber inner wall and the cold air circulation means Means to the inner wall of the refrigerator compartment And a control unit configured to electrically connect the coupling means, and a control unit to control the operation of the various components including the compressor and the cold air circulation means to control the natural air or forced convection in the refrigerating compartment. To provide.

Here, the freezing compartment side evaporator is installed to be built in the shelf partitioning the storage space in the freezer compartment, the refrigerator compartment side evaporator is preferably built in direct contact with the entire inner wall of the refrigerating compartment rear wall.

Next, the cold air circulation means is provided at a predetermined interval on the inner wall of the refrigerating chamber, and an inlet is formed at one end to form a cold air circulation passage, and a plurality of cold air distribution holes are formed to distribute and supply cold air to the refrigerating chamber side at one side of the inlet. Ducts; It is preferably configured to include a blower installed on the suction port side of the duct to blow air circulated in the refrigerating chamber to pass through the cold air circulation passage.

In this case, the inlet is formed at the upper end of the duct so that the cold air can flow from the upper end to the lower end of the cold air circulation passage, and a plurality of cold air distribution holes are formed at predetermined intervals below the inlet. More preferably, it is provided at the suction port side of the duct.

In addition, it is more preferable that the drain pipe is connected to the lower end of the duct so that the condensed water flowing down the cold air circulation passage is guided to the outside and discharged.

In addition, the duct is provided with a heat insulating material on the inner side of the cold air flow passage in contact with the cold air flow passage in order to prevent the dew from forming on the outer surface in contact with the refrigerating chamber side, the frost on the inner wall of the cold air circulation passage thickly formed on the upper side. Even if the insulation is installed so that the thickness becomes thinner from the bottom to the top so as to secure a predetermined flow path through which cold air can flow, or if the frost forms thickly on the top side of the cold room side of the cold circulation passage. It is preferable that the inner wall of the rear surface of the refrigerating compartment is inclined from the lower end to the upper end so as to secure a predetermined flow path space through which cold air can flow.

Next, the cold air distribution holes of the duct are preferably formed larger from the top to the bottom of the duct so that cold air can be uniformly distributed.

Next, it is preferable that the blower includes a blower fan and a motor for blowing cold air, and a fan housing installed at the inlet of the duct so that the blower fan is built therein.

At this time, the fan housing is formed with a protrusion for securing space protruding a predetermined length from the front end to ensure a predetermined flow space at the front end, the length of the protrusion is included in the range of 15 to 25% of the diameter of the blowing fan. The fan housing is provided with a space securing cover protruding a predetermined length from the front end so as to secure a predetermined flow space at the front end, and a plurality of suction ports are formed in the space securing cover, so as to secure the space. Protruding length of the cover is preferably configured to be included in the range of 10 to 50% of the diameter of the blowing fan.

Next, the coupling means are connected between the blower fan, the motor and the control unit, respectively, and are electrically connected to each other so that control signals and power can be transmitted to each other, and parts of the refrigerating chamber inner wall and both ends of the duct, respectively. It is preferable that the formed comprises an uneven portion that is structurally assembled with each other.

Next, the control unit is a direct cooling control and inter-cooling control to selectively control the various components according to whether the connectors are connected, the control unit is a direct cooling control to control only the compressor, when the connectors are not connected to each other, When the connectors are connected to each other, it is preferable that intercooling control is performed to control both the compressor and the blower fan.

In this case, when the temperature of the refrigerating chamber is higher than the maximum temperature of the set temperature range during the inter-cooling control, the controller operates the compressor and makes a refrigeration operation while rotating the blower fan at a predetermined first rotational speed. When the temperature of the refrigerating chamber is less than or equal to the minimum temperature of the set temperature range, it is more preferable to stop the compressor and to perform defrosting operation while rotating the blower fan at a predetermined second rotation speed which is faster than the first rotation speed.

The features and advantages of the present invention may be better understood with reference to the following accompanying drawings in conjunction with the following detailed description of embodiments of the invention, of which:

1 is a side cross-sectional view showing a direct-cooling refrigerator according to the prior art,

2 is a perspective view showing an example of a refrigerator according to the present invention;

3 is a side cross-sectional view showing an example of a refrigerator according to the present invention;

4 is a plan sectional view showing an example of a refrigerator according to the present invention;

5 is a front view showing a refrigerator main body in one example of a refrigerator according to the present invention;

6A and 6B are side cross-sectional views illustrating first and second embodiments of a heat insulating material attachment structure that may be applied to an example of a refrigerator according to the present invention;

7A and 7B are perspective views illustrating first and second embodiments of a blower apparatus which may be applied to an example of a refrigerator according to the present invention;

8 is a side cross-sectional view showing another example of a refrigerator according to the present invention;

9 is a plan sectional view showing another example of the refrigerator according to the present invention;

10 is a front view of the refrigerator body in another example of the refrigerator according to the present invention.

Description of the Preferred Embodiments

DETAILED DESCRIPTION Hereinafter, embodiments of the present invention in which the above object can be specifically realized are described with reference to the accompanying drawings.

2 to 4 are a perspective view and a side cross-sectional view and a planar cross-sectional view showing an example of a refrigerator according to the present invention, Figure 5 is a front view showing a refrigerator body in an example of the refrigerator according to the present invention.

As an example of the refrigerator according to the present invention, as shown in FIGS. 2 to 5, the freezer compartment F is formed at the lower side of the refrigerator main body 52 with the front open, and the refrigerating compartment R is formed at the upper side thereof. The freezer compartment door 54a and the refrigerating compartment door 54b are hinged to the front side of the refrigerator body 52, and a refrigerating cycle including evaporators 60a and 60b is built into the inside of the refrigerator body 52. In addition, the cold air is naturally convection in the freezing compartment F, and is cooled by the direct cooling method.

In detail, the refrigerator main body 52 is foam-molded with the heat insulating material 62 in a state in which various components are embedded between the outer case 52a and the inner cases 52b and 52c forming the exterior, and the inner case ( The predetermined freezing chamber F and the refrigerating chamber R are formed inside 52b and 52c.

At this time, in the refrigerating chamber side inner case 52c, a cold air circulation groove 52h is formed long in the vertical direction so that a separate cold air circulation passage A is formed.

Next, the evaporator (60a, 60b) is configured so that the two plates formed with the refrigerant pipe grooves overlap each other, the freezer compartment side evaporator (60a) and the refrigerating chamber side evaporator which are separately installed in the freezer compartment (F) and the refrigerator compartment (R) side. 60b, the freezing compartment side evaporator 60a and the refrigerating compartment side evaporator 60b are installed to be connected to each other so that the refrigerant can flow therebetween.

Here, the freezer compartment side evaporator (60a) can not only put food or the like inside the freezer compartment (F), but also is built into the shelf (55a) partitioning the storage space to directly cool the freezer compartment (F), while the cold storage Actual evaporator (60b) is built to be in close contact with the inner wall of the inner case (52c) of the refrigerating compartment, it is preferable that the refrigerating compartment side evaporator (60b) is installed to be in close contact only to the inner wall of the cold air circulation groove (52h) of the refrigerating compartment.

Of course, the evaporators 60a and 60b are configured to be connected to expansion means (not shown), such as a compressor 56, a condenser 58, a capillary tube, or an electronic expansion valve, so that the refrigerant is circulated to configure a refrigeration cycle.

At this time, one side of the evaporator (60a, 60b) is configured to have a temperature sensor (not shown), each temperature sensor is configured to be connected to each other and the control unit 64 for controlling the operation of the various components are input from the temperature sensor According to the temperature signal, the control unit 64 controls the operation while turning on / off the power supplied to the compressor 56.

Next, a duct 70 is installed in the cold air circulation groove 52h so as to form a cold air circulation path A, and a blower 80 is installed in the duct 70 so that It is configured to spray cold air from the upper side to the lower side, the blower 80 is also connected to the control unit 64 is controlled its operation.

At this time, since the duct 70 is mounted in the cold air circulation groove 52h, even if the shelf 55b for placing food or the like in the refrigerating chamber R is not interfered with each other.

Here, the duct 70 is formed in the upper inlet in the form of a plate, a plurality of cold air distribution holes (70h) are formed at a predetermined interval below the suction port, the cold air along the cold air circulation passage (A) The cold air distribution holes 70h are preferably formed larger toward the lower end of the duct 70 in order to be discharged with the same amount of air at each position even when flow path resistance is generated.

Of course, since the cold air flows along the cold air circulation path A, the heat exchange action with the refrigerating chamber side evaporator 60b increases, resulting in a lower temperature. Thus, the air volume of the cold air decreases toward the lower end of the duct 70. On the other hand, by maintaining a lower temperature state, even if the size of the cold air distribution holes 70h is the same, it can produce the same cooling effect at each position.

And, the duct 70 is mounted so that both ends are fitted into the cold air circulation groove (52h), the duct 70 of the duct 70 in the state mounted to the cold air circulation groove (52h) Since the front surface is configured to form the same plane as the inner wall of the refrigerating compartment side inner case 52c, it is possible to prevent the internal volume of the refrigerating compartment from being reduced compared to the conventional direct refrigeration refrigerating compartment.

At this time, since the heat insulating material 72 having a predetermined thickness is attached to the rear surface of the duct 70, the duct (even if frost or condensed water forms on the surface of the cold air circulation groove 52h in which the refrigerating chamber side evaporator (0Ob) is installed). It is not only covered by 70) but also hygienic cooling by the frost and condensed water is not formed on the outer surface of the duct 70 in contact with the refrigerating chamber (R) side by the adiabatic action.

In addition, a drain pipe (not shown) is installed at the lower end of the duct 70 so that the frost formed on the surface of the cold air circulation groove 52h may be guided to the outside, and condensed water may be provided at the end of the drain pipe. A drain pan (not shown) is collected, and the drain pan is preferably installed to be drawn out to the outside.

Next, the blower 80 is a blowing fan 82 for blowing the cold air circulated in the refrigerating chamber (R) toward the cold air circulation passage (A), a motor 84 for driving the same, and the blowing fan 82 And a fan housing 86 in which a motor 84 is embedded, and the fan housing 86 is installed to be mounted on the inlet side of the duct 70, and the motor 84 is connected to the control unit 64. It is connected to control the operation of the blowing fan 82 by turning on / off the power supplied to the motor 84.

At this time, the blower fan 82 is preferably applied to the axial flow fan for blowing cold air in the axial direction, the cold air circulation passage formed by the fan housing 86 and the duct 70 and the cold air circulation groove (52h) (A) is formed to allow cold air to be guided.

Of course, it is preferable to minimize the suction flow resistance by placing an article at a predetermined interval in front of the fan housing 86, the interval is more preferably determined according to the diameter of the blower fan (82).

Next, the controller 64 controls the operation of the compressor 56 and the blower fan 82 while turning on / off the power supplied to the compressor 56 and the motor 84, as well as other components. While controlling the operation of the refrigeration set temperature (Tf ₀ ) and the refrigerating set temperature (Tr ₀ ) input by the temperature measured by the temperature sensor is input from the outside, the refrigeration set temperature range and the refrigeration set temperature range determined accordingly Each component is controlled to reach, but for example, by adjusting the opening value of the electromagnetic expansion valve to control the refrigerant flow rate and the decompression degree.

At this time, when the temperature of the refrigerating chamber (R) is equal to or higher than the maximum temperature (Tr _M ) of the refrigerating set temperature range, the control unit 64 operates the compressor (56) and at the same time a predetermined first operation of the blowing fan (82). It controls the refrigeration operation while rotating at the rotational speed.

However, when the temperature of the refrigerating chamber (R) is less than or equal to the minimum temperature (Tr _m ) of the refrigerating set temperature range, the control unit 64 stops the compressor (56) so that a relatively high temperature refrigerant is stored in the refrigerating chamber side evaporator (60b). At the same time, the blowing fan 82 is rotated at a predetermined second rotational speed faster than the first rotational speed to circulate relatively high-temperature air to melt frost formed on the surface of the refrigerator compartment side evaporator 60b. To control the defrosting operation.

6A and 6B are side cross-sectional views illustrating first and second embodiments of a heat insulating material attachment structure that may be applied to an example of a refrigerator according to the present invention.

Meanwhile, a cold air circulation passage directly contacting the refrigerator compartment side evaporator 60b in a refrigerator capable of implementing an indirect cooling method in which a separate duct 70 is attached to the direct cooling refrigerator R as forced air blowing as described above. There is a lot of frost on).

Specifically, a lot of frost is formed on the cold air circulation passage (A) close to the inlet of the duct 70, which is the air circulated in the refrigerating chamber (R) is sucked through the inlet of the duct 70, then In contact with the cold air circulation groove 52h which is in direct contact with the refrigerating chamber side evaporator 60b, moisture in the air forms frost on the surface of the cold air circulation groove 52h. More thickly formed, even if the frost is formed on the cold air circulation path 52A in this way can be implemented in various ways to secure the flow space of the cold air.

For example, as shown in FIG. 6A, the duct 70 and the cold air circulation groove 52h are vertically balanced with each other, and the heat insulating material 72a is thinner from the lower end to the upper end on the inner surface of the duct 70. Since the cold air circulation path A is formed larger at the upper end than the lower end, the predetermined flow space in which cold air can flow even if frost 1 is formed at the upper end in the cold air circulation path A). It is possible to ensure that the cooling efficiency can be prevented.

Usually, even if frost is formed on the cold air circulation passage A, the thickness of the frost 1 is about 5 mm at most, so that the upper thickness of the heat insulating material 72 'is about 5 mm higher than the bottom thickness of the heat insulating material 72'. Make it thin.

As another example, while the duct 70 is vertically formed as shown in FIG. 6B, the cold air circulation groove 52h is formed to be inclined from the bottom to the top, and has a uniform thickness on the inner surface of the duct 70. Since the heat insulating material 72 is configured to be attached, as in the example, the cold air circulation path A has a larger flow path at the top than the bottom, so even if frost forms at the top in the cold air circulation path A, cold air may flow. It is possible to secure a predetermined flow space which can prevent the degradation of the cooling efficiency.

7A and 7B are perspective views illustrating first and second embodiments of a blower apparatus which may be applied to an example of a refrigerator according to the present invention.

On the other hand, the cold air circulating directly in contact with the refrigerator compartment side evaporator (60b) the cold air circulated in the refrigerator compartment in the refrigerator that can implement an indirect cooling method to force the cold air by attaching a separate duct (70) to the direct cooling refrigerator as described above. To flow into the flow path (A), a predetermined flow space in front of the suction port and the blowing fan 82 of the duct 70 in order to prevent the flow rate is reduced due to the flow resistance of the inlet side of the duct (70). Various blowers can be implemented to secure them.

For example, as shown in FIG. 7, a pair of space securing protrusions 88a and 88b are formed on the cover 87 perpendicular to the tip of the fan housing 84 at a predetermined length in the horizontal direction. The cover has a plurality of suction ports 87h, but the lengths of the space securing protrusions 88a and 88b are included in a range of 15 to 25% of the diameter of the blowing fan 82. The dragon protrusions 88a and 88b secure a predetermined flow space so that a resistance object such as food is not placed in front of the suction port of the duct 70.

At this time, the flow resistance in front of the inlet port of the duct 70 increases the flow resistance, but the length of the space securing protrusions 88a, 88b is 30% of the diameter of the blower fan 82 Even if the flow space is secured by the configuration, the flow resistance is not significantly reduced.

As another example, as shown in FIG. 7B, a space securing cover 89 protruding a predetermined length is installed on the front of the fan housing 84, and the space securing cover 89 is convex to have a hemisphere or the like. At the same time a plurality of suction ports (89h) are formed, the protruding length is configured to be included in the range of 10 to 50% of the diameter of the blowing fan 82, this cover for securing space 89 is also the duct 70 In order to ensure a predetermined flow space in front of the suction port of the).

8 and 9 are side cross-sectional views and planar cross-sectional views showing another example of the refrigerator according to the present invention, Figure 10 is a front view showing the refrigerator body in another embodiment of the refrigerator according to the present invention.

As another example of the refrigerator according to the present invention, as shown in FIGS. 8 to 9, the refrigerator compartment R and the freezer compartment F are formed on the inside and the inside of the refrigerator body 152, and the evaporators 160a and 160b are formed on the inner wall. A refrigeration cycle including an expansion means (not shown), such as a compressor 156, a condenser 158, a capillary tube or an electronic expansion valve, is built in to cool the freezing compartment F and the refrigerating compartment R by a direct cooling method. A separate cold air circulation means in the refrigerating chamber (R) is selectively assembled by the structural coupling means and the electrical coupling means to allow the refrigerating compartment to be cooled by indirect cooling.

In detail, the refrigerator main body 152 is foam-molded with the heat insulating material 162 in a state in which various components are embedded between the outer case 152a and the inner cases 152b and 152c forming the exterior, and the refrigerator compartment side inner The cold air circulation means is installed on one surface of the case 152c so that the cold air circulation path A is formed.

Next, the evaporator (160a, 160b) consists of a freezer compartment side evaporator (160a) and a refrigerator compartment side evaporator (160b) through which refrigerant can flow, but the freezer compartment side evaporator (160a) directly cools the freezer compartment (F). The refrigerator compartment side evaporator 160b is built in close contact with one inner wall of the inner case 152c of the refrigerator compartment.

Of course, one side of the evaporator (160a, 160b) is configured to have a temperature sensor (not shown), each temperature sensor is configured to be connected to each other and the control unit 164 for controlling the operation of the various components are input from the temperature sensor The control unit 164 controls the operation of the compressor 156 by turning on / off the power supplied to the compressor 156 according to the temperature signal.

Next, the cold air circulation means is installed at a predetermined interval on the entire inner wall of the refrigerating chamber (R) to form a cold air circulation passage (A) on the entire surface of the inside of the refrigerating chamber (R) in close contact with the evaporator (160b). It consists of a duct 170 and a blower 180 for blowing to the cold air circulation passage (A) for blowing cold air circulating the refrigerating chamber (R) so that cold air is injected from the upper side of the refrigerating chamber (R) toward the lower side. Although configured, the blower 180 is also selectively connected to the control unit 164 to control the operation.

At this time, even when the duct 170 is mounted on the inner wall of the refrigerating chamber R in which the refrigerating chamber side evaporator 160b is in direct contact with each other, the shelf 155b for placing food in the refrigerating chamber R does not interfere with each other. In addition, the space formed between the shelf 155b and the inner case 152c of the refrigerating compartment may be used as the cold air circulation passage A in order to allow cold air to be circulated in the conventional direct cooling refrigerator, thereby reducing the volume of the inside of the refrigerating compartment R. You can prevent it.

Here, the duct 170 is formed in a plate shape that can cover all the one surface of the inner case 152c of the refrigerating chamber, the suction port is formed at the top and at the same time a plurality of cold air distribution holes at the lower side 170h is formed, and the cold air distribution holes 170h are preferably formed larger toward the lower side, but may be formed in the same size.

In this case, a predetermined thickness on the rear surface of the duct 170 in order to prevent moisture in the air in the refrigerating chamber R side from condensing on the front surface of the duct 170 under the influence of cold air flowing along the cold air circulation passage A. It is configured to be attached to the heat insulating material 172, the drain pipe (not shown) to be guided to the outside even if the condensate flows down and the drain pan (not shown) is installed at the bottom of the duct 170 is collected. desirable.

In particular, the duct 170 is structurally mounted on the inner wall of the refrigerating chamber R side by structural coupling means such as an uneven portion, and the structural coupling means is elongated vertically at both ends of the rear surface of the duct 170, for example. The guide rails 192 and the guide rails 192 of the duct may be configured to include guide protrusions 194 protruding vertically in the refrigerating chamber inner case 152c so as to be fitted thereto. Can be configured in various ways.

Next, the blower 180 is a blowing fan 182 for blowing the cold air circulated in the refrigerating chamber (R) toward the cold air circulation passage (A), a motor 184 for driving the same, and the blowing fan 182 And a fan housing 186 in which the motor 184 is embedded, and the fan housing 186 is installed to be mounted at the inlet side of the duct 170, and the motor 184 is connected to the motor by the electrical coupling means. It is connected to the control unit 164 to control the operation of the blowing fan 182 by turning on / off the power supplied to the motor 184.

In this case, the electrical coupling means are the connectors 196 and 198 connected to the motor 184 and the control unit 164 by wires, respectively, the connector 198 of the control unit is installed to be fixed to the upper surface of the inner case 152c of the refrigerating compartment. The connector 196 of the motor is assembled to the connector 198 of the controller so that electrical signals such as a control signal and a power supply can be transmitted.

Next, the controller 164 is connected to the components such as the temperature sensor, the compressor 156 and the motor 184 for driving the blower fan 182 to control the operation of the various components, the freezer compartment (F) And a temperature measured by the temperature sensor in the refrigerating chamber R to reach a refrigeration set temperature range and a refrigeration set temperature range determined by a refrigeration set temperature Tf ₀ and a refrigeration set temperature Tr ₀ input from the outside. In particular, in the refrigerating chamber R, the direct duct control and the intercooling control are selectively performed depending on whether the duct 170 and the blower 180 are connected.

Here, when the connector 196 of the motor is not connected to the connector 198 of the control unit, the control unit 164 performs direct cooling control according to a pre-directed direct cooling control program, while the connector 198 of the control unit is connected to the connector 198 of the control unit. When the connector 196 of the motor is not connected, the control unit 164 allows the intercooling control to be performed according to the pre-cooling intercooling control program.

At this time, the direct cooling control compares the set refrigerating temperature (Tr ₀ ) input from the outside and the temperature input from the temperature sensor, and adjusts the operation of the compressor 156 according to the cooling capacity according to the compression capacity of the refrigerant. The inter-cooling control compares the set refrigeration temperature (Tr ₀ ) input from the outside with the temperature input from the temperature sensor, and adjusts the operation of the compressor 156 and the motor 184 according to the refrigerant. It is made to adjust the cooling capacity according to the compression capacity and the cold air flow rate.

Particularly, when the temperature of the refrigerating chamber R is greater than or equal to the maximum temperature Tr _M of the refrigerating set temperature range in the intercooling control, the compressor 156 is operated and the blower fan 182 is first rotated by a predetermined first rotation. While refrigeration operation is performed while rotating at a speed, when the temperature of the refrigerating chamber R is lower than or equal to the minimum temperature Tr _m of the refrigerating set temperature range, the compressor 156 is stopped to allow a relatively high temperature refrigerant to be stored in the refrigerating compartment side. While passing through the evaporator 156b, the blower fan 182 is rotated at a predetermined second rotational speed faster than the first rotational speed so that relatively hot air is circulated and formed on the surface of the refrigerator compartment side evaporator 160b. Allow defrosting to melt frost.

Therefore, the refrigerator of the present invention configured as described above is cooled in a freezer compartment by direct convection while cold air is convection naturally, while the cold air is forcedly blown by mounting the duct and the blower in the refrigerating compartment, while indirect cooling is applied. In this case, the cooling chamber is configured to be cooled, and thus, the refrigerator compartment may be simply switched to a direct cooling method or an indirect cooling method, and the refrigerator compartment may be uniformly cooled.

In addition, the refrigerator of the present invention forms a predetermined cold air circulation groove on the inner wall of the refrigerating compartment in the conventional direct cooling refrigerator, or installs a separate duct and a blower in the cold air circulation space at the rear end side of the refrigerator, compared to the conventional direct cooling refrigerator. There is an advantage that can be configured without reducing the internal capacity of the.

In addition, the refrigerator of the present invention forms a cold air circulation path by installing a duct inside the refrigerating compartment, and a cold air circulation is formed because the refrigerator compartment side evaporator is built in the inner wall of the refrigerating compartment that is in contact with the cold circulation passage and the insulation is attached to the inner side of the duct. Even if it circulates along the flow path, it is not only prevented from forming condensate on the duct outer surface, that is, the part exposed to the refrigerating chamber, by being insulated by the heat insulating material, and furthermore, it is advantageous in maintaining a hygienic clean state.

In addition, the refrigerator of the present invention can omit a component such as a separate defrost heater because the defrosting operation is performed by rotating the blower fan more quickly in the state in which the compressor is stopped even if frost is formed on the cold air circulation charge, It is possible to prevent the high energy loss and the rise of the refrigerating compartment has the advantage of increasing the cooling efficiency.

In addition, the refrigerator of the present invention is configured to vary the thickness of the heat insulating material attached to the inner surface of the duct constituting part of the cold air circulation passage, or to configure the inner wall of the refrigerating compartment constituting another part of the cold air circulation passage to be inclined. Even if frost is formed, it is possible to secure a predetermined cold air circulation path, thereby ensuring a predetermined cooling performance.

In addition, since the refrigerator of the present invention is equipped with a space securing protrusion or a space securing cover of a predetermined length so as to secure a predetermined flow space on the suction port side of the cold air circulation passage, the circulation flow rate of the cold air is minimized because the suction passage resistance is minimized. The dl can be prevented from being reduced, so that there is an advantage of ensuring a predetermined cooling performance.

In the above, the present invention has been described in detail based on the embodiments of the present invention and the accompanying drawings. However, the scope of the present invention is not limited by the above embodiments and drawings, and the scope of the present invention will be limited only by the contents described in the claims below.

Claims (35)

delete A refrigerator body configured to partition the freezer compartment and the refrigerating compartment from each other, A freezer compartment side evaporator provided at the freezer compartment side to directly cool the freezer compartment; A refrigerator compartment side evaporator provided behind the refrigerator compartment inner wall to cool the refrigerator compartment; A freezing cycle configured to include a compressor, a condenser, and expansion means connected to the freezer compartment side evaporator and the refrigerating compartment side evaporator so that the refrigerant is circulated and a cooling operation is performed around the evaporators; A duct formed on the inner wall of the refrigerating chamber in which the refrigerating chamber side evaporator is located, and having a plurality of cold air distribution holes for distributing and supplying cold air from the refrigerating chamber side to the refrigerating chamber side so as to form a cold air circulation passage in the vertical direction; A blower installed at the inlet side of the duct to blow air circulated in the refrigerating chamber to pass through the cold air circulation passage; It includes a control unit for controlling the operation of the various components including the compressor and the blower to control the natural air or forced convection in the refrigerator compartment, The freezer compartment side evaporator is characterized in that the refrigerator is installed to be built in the shelf partitioning the storage space. A refrigerator body configured to partition the freezer compartment and the refrigerating compartment from each other, A freezer compartment side evaporator provided at the freezer compartment side to directly cool the freezer compartment; A refrigerator compartment side evaporator provided behind the refrigerator compartment inner wall to cool the refrigerator compartment; A freezing cycle configured to include a compressor, a condenser, and expansion means connected to the freezer compartment side evaporator and the refrigerating compartment side evaporator so that the refrigerant is circulated and a cooling operation is performed around the evaporators; A duct formed on the inner wall of the refrigerating chamber in which the refrigerating chamber side evaporator is located, and having a plurality of cold air distribution holes for distributing and supplying cold air from the refrigerating chamber side to the refrigerating chamber side so as to form a cold air circulation passage in the vertical direction; A blower installed at the inlet side of the duct to blow air circulated in the refrigerating chamber to pass through the cold air circulation passage; It includes a control unit for controlling the operation of the various components including the compressor and the blower to control the natural air or forced convection in the refrigerator compartment, The refrigerator compartment side evaporator is built to be in direct contact with only a part of the inner wall of the refrigerating compartment, and a cold air circulation groove is formed in a portion of the refrigerator compartment inner wall in which the refrigerator compartment side evaporator is built in the longitudinal direction, and the duct is configured for the cold air circulation. And a refrigerator installed in the groove to be coplanar with the inner wall of the refrigerating compartment. The method of claim 3, wherein The duct is provided with the suction port at the top so that cold air can flow from the upper end to the lower end of the cold air circulation passage, and a plurality of cold air distribution holes are formed at a predetermined interval below the suction port, and the blower is the duct Refrigerator, characterized in that installed on the inlet side of the. The method of claim 4, wherein And a drain pipe is connected to a lower end of the duct so that the condensed water flowing down the cold air circulation passage is guided to the outside and discharged. A refrigerator body configured to partition the freezer compartment and the refrigerating compartment from each other, A freezer compartment side evaporator provided at the freezer compartment side to directly cool the freezer compartment; A refrigerator compartment side evaporator provided behind the refrigerator compartment inner wall to cool the refrigerator compartment; A freezing cycle configured to include a compressor, a condenser, and expansion means connected to the freezer compartment side evaporator and the refrigerating compartment side evaporator so that the refrigerant is circulated and a cooling operation is performed around the evaporators; A duct formed on the inner wall of the refrigerating chamber in which the refrigerating chamber side evaporator is located, and having a plurality of cold air distribution holes for distributing and supplying cold air from the refrigerating chamber side to the refrigerating chamber side so as to form a cold air circulation passage in the vertical direction; A blower installed at the inlet side of the duct to blow air circulated in the refrigerating chamber to pass through the cold air circulation passage; It includes a control unit for controlling the operation of the various components including the compressor and the blower to control the natural air or forced convection in the refrigerator compartment, The duct is a refrigerator, characterized in that the heat insulating material is installed on the inner surface in contact with the cold air circulation path in order to prevent the dew from forming on the outer surface in contact with the refrigerator compartment side. The method of claim 6, The insulation is installed so that its thickness becomes thinner from the lower end to the upper end so as to secure a predetermined flow path space in which cold air can flow even though the frost forms thickly on the upper side of the refrigerating chamber side of the cold air circulation passage. Refrigerator. The method of claim 6, The cold air circulation groove is formed to be inclined from the lower end to the upper end so as to secure a predetermined flow path space in which cold air can flow even though the frost forms thickly on the upper side of the refrigerating chamber side of the cold circulation passage. Refrigerator. The method according to any one of claims 4 to 8, The cold air distribution holes of the duct is characterized in that the refrigerator is formed larger toward the lower end from the top of the duct so that the cold air can be uniformly distributed. A refrigerator body configured to partition the freezer compartment and the refrigerating compartment from each other, A freezer compartment side evaporator provided at the freezer compartment side to directly cool the freezer compartment; A refrigerator compartment side evaporator provided behind the refrigerator compartment inner wall to cool the refrigerator compartment; A freezing cycle configured to include a compressor, a condenser, and expansion means connected to the freezer compartment side evaporator and the refrigerating compartment side evaporator so that the refrigerant is circulated and a cooling operation is performed around the evaporators; A duct formed on the inner wall of the refrigerating chamber in which the refrigerating chamber side evaporator is located, and having a plurality of cold air distribution holes for distributing and supplying cold air from the refrigerating chamber side to the refrigerating chamber side so as to form a cold air circulation passage in the vertical direction; A blower installed at the inlet side of the duct to blow air circulated in the refrigerating chamber to pass through the cold air circulation passage; It includes a control unit for controlling the operation of the various components including the compressor and the blower to control the natural air or forced convection in the refrigerator compartment, The blower device comprises a blower fan and motor for blowing cold air, and a fan housing is installed in the inlet of the duct so that the blower fan is built, the fan housing is built in the blower fan and the motor. The method of claim 10, The fan housing is a refrigerator, characterized in that the protrusion to secure the space protruding a predetermined length from the front end to ensure a predetermined flow space at the front end is formed. The method of claim 11, Refrigerator, characterized in that configured to be included in the 15-15% range of the diameter of the blower fan. The method of claim 10, The fan housing is a refrigerator, characterized in that the space securing cover protruding from the front end to a predetermined length so as to secure a predetermined flow space, the space securing cover is formed with a plurality of suction ports. The method of claim 13, The protruding length of the cover for ensuring space is configured to be included in the range of 10 to 50% of the diameter of the blowing fan. The method according to any one of claims 10 to 14, When the temperature of the refrigerating compartment is greater than or equal to the maximum temperature of the refrigerating set temperature range, the controller operates the compressor and performs the refrigeration operation while rotating the blower fan at a predetermined first rotation speed, and the temperature of the refrigerating compartment is refrigerated. When the temperature is less than the minimum temperature of the set temperature range, the refrigerator is stopped and at the same time the defrosting operation is performed while rotating the blowing fan at a predetermined second rotation speed faster than the first rotation speed. A refrigerator body configured to partition the freezer compartment and the refrigerating compartment from each other, A freezer compartment side evaporator provided at the freezer compartment side to directly cool the freezer compartment; A refrigerator compartment side evaporator provided behind the refrigerator compartment inner wall to cool the refrigerator compartment; A freezing cycle configured to include a compressor, a condenser, and expansion means connected to the freezer compartment side evaporator and the refrigerating compartment side evaporator so that the refrigerant is circulated and a cooling operation is performed around the evaporators; Cold air circulation means for circulating the cold air generated on the cold air circulation passage in the refrigerating chamber is installed detachably to form a cold air circulation passage in the vertical direction on the inner wall of the refrigerating chamber, the refrigerator compartment side evaporator; A coupling means installed between the inner wall of the refrigerating compartment and the cold air circulation means to assemble the cold air circulation means structurally and electrically to the inner wall of the refrigerating compartment; And a control unit configured to control the operation of various components including the compressor and the cold air circulation means to control cold or natural convection in the refrigerating compartment. The method of claim 16, The freezer compartment side evaporator is characterized in that the refrigerator is installed to be built in the shelf partitioning the storage space. The method of claim 16, And the refrigerator compartment side evaporator is built in direct contact with the entire inner wall of the rear surface of the refrigerator compartment. The method of claim 18, The cold air circulation means may be installed at predetermined intervals on the inner wall of the refrigerating chamber, and an inlet may be formed at one end to form a cold air circulation passage, and at the same time, a plurality of cold air distribution holes may be formed to distribute and supply cold air to the refrigerating chamber side. ; And a blower installed at an inlet side of the duct to blow air circulated in the refrigerating compartment to pass through the cold air circulation passage. The method of claim 19, The duct is provided with the suction port at the top so that cold air can flow from the upper end to the lower end of the cold air circulation passage, and a plurality of cold air distribution holes are formed at a predetermined interval below the suction port, and the blower is the duct Refrigerator, characterized in that installed on the inlet side of the. The method of claim 20, And a drain pipe is connected to a lower end of the duct so that the condensed water flowing down the cold air circulation passage is guided to the outside and discharged. The method of claim 19, The duct is a refrigerator, characterized in that the heat insulating material is installed on the inner surface in contact with the cold air circulation path in order to prevent the dew from forming on the outer surface in contact with the refrigerator compartment side. The method of claim 22, The insulation is installed so that its thickness becomes thinner from the lower end to the upper end so as to secure a predetermined flow path for the cold air to flow even though the frost is formed on the inner side of the refrigerating chamber side of the cold air circulation passage. Refrigerator. The method of claim 22, A refrigerator characterized in that the inner wall of the rear surface of the refrigerating compartment is inclined from the lower end to the upper end so as to secure a predetermined flow path for the cold air to flow even though the frost is formed on the inner side of the refrigerating compartment side of the cold air circulation passage. . The method according to any one of claims 20 to 24, The cold air distribution holes of the duct is characterized in that the refrigerator is formed larger toward the lower end from the top of the duct so that the cold air can be uniformly distributed. The method according to any one of claims 19 to 24, The blower device comprises a blower fan and motor for blowing cold air, and a fan housing is installed in the inlet of the duct so that the blower fan is built, the fan housing is built in the blower fan and the motor. The method of claim 26, The fan housing is a refrigerator, characterized in that the protrusion to secure the space protruding a predetermined length from the front end to ensure a predetermined flow space at the front end is formed. The method of claim 27, Refrigerator, characterized in that configured to be included in the 15-15% range of the diameter of the blower fan. The method of claim 26, The fan housing is a refrigerator, characterized in that the space securing cover protruding from the front end to a predetermined length so as to secure a predetermined flow space, the space securing cover is formed with a plurality of suction ports. The method of claim 29, The protruding length of the cover for ensuring space is configured to be included in the range of 10 to 50% of the diameter of the blowing fan. The method of claim 26, The coupling means is a refrigerator characterized in that it comprises a connector which is connected between the blowing fan and the motor and the control unit, respectively, and electrically assembled to transmit control signals and power to each other. The method of claim 31, wherein The coupling means is a refrigerator characterized in that it comprises a concave-convex portion formed in each of the parts in contact with each other on both ends of the inner wall and the duct of the refrigerating chamber structurally assembled with each other. The method of claim 31, wherein The control unit is characterized in that the direct cooling control and inter-cooling control of the various components are selectively made according to whether the connectors are connected. The method of claim 33, wherein When the connectors are not connected to each other, the direct cooling control is performed to control only the compressor. When the connectors are connected to each other, the control unit performs intercooling control to control both the compressor and the motor driving the blower fan. Refrigerator. The method of claim 34, wherein When the temperature of the refrigerating compartment is more than the maximum temperature of the set temperature range during the inter-cooling control, the controller operates the compressor and performs the refrigerating operation while rotating the blower fan at a predetermined first rotational speed. And a defrosting operation is performed while stopping the compressor and rotating the blower fan at a predetermined second rotational speed faster than the first rotational speed when the temperature is less than or equal to the minimum temperature of the set temperature range.

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