KR101821289B1 - Refrigerator - Google Patents

Abstract

The present invention relates to a refrigerator. According to the present invention, the refrigerator comprises: a heat exchange chamber; a refrigerating compartment; a freezing compartment placed on a front side of the heat exchange chamber; a main frame placed in the freezing compartment to have a deep-freezing chamber whose temperature is kept to be lower than that of the freezing compartment; an evaporator placed in the heat exchange chamber; and a deep-freezing module which cools air in the deep-freezing chamber. The deep-freezing module comprises: a thermoelectric element which includes: a heat discharge surface; and a heat absorption surface placed to face the heat discharge surface; and an evaporation unit for a heat conduction unit whose one side comes in contact with the heat discharge surface of the thermoelectric element and the other side is connected to a refrigerant pipe of the evaporator to transfer heat discharged from the heat discharge surface of the thermoelectric element to a refrigerant through a heat exchange. The evaporation unit for the heat conduction unit is serially connected to the evaporator, thereby allowing the refrigerator to simultaneously perform both an operation for cooling the refrigerating compartment or the freezing compartment and an operation for cooling the deep-freezing chamber.

Description

Refrigerator {REFRIGERATOR}

The present invention relates to a refrigerator having a core room kept at a lower temperature than the freezer compartment.

Generally, a refrigerator is a household appliance having a freezer compartment and a refrigerating compartment in a main body, and storing food at a predetermined temperature in a freezing compartment and a refrigerating compartment to maintain the freshness of the food.

Particularly, when the meat or fish is frozen, if the temperature of the freezing point zone in which intracellular ice is formed is passed within a short period of time, cell destruction is minimized and the meat quality is kept fresh even after thawing.

For this reason, consumers are increasingly demanding a separate storage space capable of rapidly freezing the food to a temperature lower than the temperature of the freezing room in addition to the refrigerator or freezer.

In order to satisfy the above requirement, the present applicant proposed a refrigerator having a rapid cooling module for rapidly cooling a separate storage space (referred to as a 'core room' in the present specification) using a thermoelectric module (TEM) (Refer to the following prior art document D1).

An evaporator 33 (hereinafter collectively referred to as a "cooling chamber evaporator") for cooling a cooling chamber and an evaporator 32 (hereinafter referred to as an evaporator for a heat conductive unit) for cooling the heat generating surface of the thermoelectric element ) Are connected in parallel, the cooling chamber and the core room 30 can be alternately operated.

For example, when the cooling chamber is operated alone, the compressor (35) and the cooling chamber fan (37) are driven, and the refrigerant flows to the cooling chamber by the valve (36).

When the core room 30 is operated alone, the compressor 35 and the cooling fan 38 of the core room 30 are driven, and the refrigerant flows into the core room 30 by the valve 36.

 However, when the cooling chamber and the core room 30 are alternately operated, the size of the evaporation portion 32 for the heat conduction unit for covering the cooling loss and the heat radiation amount of the thermoelectric element 31 is significantly increased, There is a disadvantage that material cost increases. This is because, when the cooling chamber is operated alone, the core room 30 rises in temperature for a period of time during which operation is not possible, resulting in a cooling loss. The same applies to the case where the core room 30 is operated alone.

On the other hand, when the three-way valve is used as the valve 36 for simultaneously operating the cooling chamber and the core room 30, it is difficult to accurately distribute the refrigerant to the evaporator and the heat conduction unit by the three-way valve. For example, due to an improper distribution of the three-way valve, there arises a problem that the cooling performance deteriorates when the refrigerant is further divided into a predetermined ratio to either the evaporator or the heat conduction unit.

The total evaporation capacity (the size of the evaporator and the output of the compressor) is calculated as the sum of the required evaporation capacity (e.g., 70) of the cooling chamber evaporator 33 and the required evaporation capacity (e.g., 30) of the evaporation portion 32 for the heat- , I.e., 100, so that the total evaporation capacity is excessively designed.

D1: Patent application No. 10-2015-0019598 (filed on February 28, 2015)

It is an object of the present invention to provide a cooling chamber and a core room in which a cooling chamber and a core room can be operated simultaneously by connecting the evaporator for a heat conduction unit and a cooling chamber evaporator in series, And to provide a refrigerator which can solve the reliability problem of refrigerant distribution occurring during simultaneous operation of the core room and the over design problem of the evaporation capacity.

Another object of the present invention is to provide a refrigerator capable of improving the cooling efficiency of the heat generating surface of the thermoelectric element by optimizing the shape of the refrigerant flow path formed or connected to the evaporation portion for the heat conduction unit, thereby achieving the deep temperature.

A refrigerator according to the present invention includes: a heat exchange chamber; Refrigerator room; A freezing chamber positioned adjacent to the refrigerating chamber and disposed in front of the heat exchange chamber; And a core chamber disposed inside the freezer chamber and maintained at a temperature lower than a temperature of the freezer chamber; A refrigerator compartment door for opening and closing the refrigerator compartment; A freezing chamber door for opening and closing the freezing chamber; A drawer assembly housed in the core room; A cooling chamber evaporator provided inside the heat exchange chamber; A compressor for allowing the refrigerant to flow to the evaporator for the cooling chamber; And a deep cooling module for cooling air in the core room, wherein the deep cooling module comprises: a thermoelectric element having a heat generating surface and a heat absorbing surface arranged to face the heat generating surface; A cold sink in which one side is in heat-exchangeable contact with the heat absorbing surface of the thermoelectric element; An evaporator for a heat conduction unit, one side of which is in contact with the heat generating surface of the thermoelectric element, the other side of which is connected to the refrigerant tube of the evaporator for cooling the room, and which transfers heat discharged from the heat generating surface of the thermoelectric element to the refrigerant through heat exchange; A first fan for exchanging heat between the air in the core room and the other side of the cold sink; And a second fan for exchanging air between the air in the heat exchange chamber and the other side of the evaporator for the heat conduction unit, wherein the evaporator for the heat conduction unit is connected in series with the evaporator for the cooling chamber, Simultaneous operation is possible.

According to another embodiment of the refrigerator of the present invention, the circulation flow path is branched from the upstream side of the evaporator so that the refrigerant bypasses the evaporator, and the other side bypasses the evaporator to bypass the evaporator for the heat- And a bypass flow path which is merged into the bypass flow path.

According to another embodiment of the refrigerator of the present invention, the amount of heat exchange between the central portion having a relatively high temperature on the heat generating surface and the refrigerant may be greater than the heat exchange amount between the peripheral portion surrounding the central portion of the heat generating surface and the refrigerant.

A control method of a refrigerator according to the present invention includes a main body having a heat exchange chamber, a refrigerating chamber, a freezing chamber, and a core chamber maintained at a temperature lower than a temperature of the freezing chamber; An evaporator accommodated in the heat exchange chamber; A compressor for allowing the refrigerant to flow to the evaporator; A deep cooling module for cooling air in the core room by using the thermoelectric element; A blowing fan for blowing the cool air generated in the evaporator to the refrigerator compartment and the freezer compartment; A detection unit having a first temperature sensor for sensing the temperature of the refrigerating compartment and a second temperature sensor for sensing the temperature of the freezing compartment; And a controller for controlling the compressor, the blower fan, the first fan, and the thermoelectric element to control the temperatures of the refrigerator compartment, the freezer compartment, and the heart chamber according to a detection signal from the detector, The cooling chamber and the core room are simultaneously cooled to each other if the cooling chamber temperature and the core room temperature are unsatisfactory based on the recognized cooling chamber temperature and the core room temperature, The cooling air flow to the cooling chamber is blocked to drive only the cooling of the core room. When the temperature of the core room is satisfactory, the cooling of the cooling room is terminated.

According to another embodiment, when the deep temperature mode is selected, based on the recognized cooling chamber temperature, when the temperature of the cooling chamber is unsatisfactory, the cooling chamber and the core chamber are simultaneously cooled, and if the temperature of the cooling chamber is satisfactory , The driving for only the core room cooling starts. When the sum of the driving time for the simultaneous cooling and the driving time for the single room cooling only exceeds a certain time, the cooling of the core room is terminated.

According to yet another embodiment, it is possible to cancel the simultaneous cooling function of the cooling chamber and the core room so that only one of the cooling chamber or the core room can be driven independently in accordance with the set priorities. For example, it is possible to set the refrigerator compartment cooling to be preferentially performed for the refrigerating compartment and the core room, and to perform the simultaneous cooling and the single compartment cooling for the freezing compartment and the heart room.

According to the present invention configured as described above, the following effects can be obtained.

First, the evaporation unit for the heat conduction unit for improving the heat radiation performance of the thermoelectric element is connected in series with the conventional evaporator for the cooling chamber, so that the cooling chamber and the core room are operated at the same time, Cooling loss can be solved. In addition, it is possible to solve the reliability problem of the refrigerant distribution and the excessive design problem of the evaporation capacity which occur when the valve is switched to the three-way valve and the cooling chamber and the core room are simultaneously operated.

Second, by using the technique of the present invention, it is possible to realize the temperature of the core room to -40 ° C or less by efficiently designing the refrigerant pipe of the evaporation unit for the heat conduction unit, so that when the cryogenic refrigerated storage food such as meat is stored in the greenhouse, It not only improves the quality of food by reducing the ripening loss of the tissues (DRIP LOSS) but also can keep meat and fish in the different frozen temperature zone, which can contribute to enhance the competitiveness of the product.

1 is a conceptual diagram for explaining a cooling method of a heart chamber in a refrigerator of the prior art document D1.
2 is a perspective view of a refrigerator according to the present invention.
FIG. 3 is a conceptual diagram showing a heart chamber arranged in the freezer compartment of FIG. 2. FIG.
4 is a cross-sectional view taken along the line AA in Fig.
5 is an assembly view showing the deep cooling module of FIG.
FIG. 6 is an exploded perspective view showing the deep cooling module of FIG. 2. FIG.
7 is a cross-sectional view taken along line BB in Fig.
8 is a conceptual view showing a state in which a refrigerant channel is formed inside a vaporizing portion for a heat conduction unit according to the first embodiment of the present invention.
FIG. 9 is an exploded perspective view showing the assembly of the first and second heat exchange plates of FIG. 8; FIG.
10 is a conceptual view showing a state in which a refrigerant channel is formed on the inner surface of the first heat exchange plate in FIG.
11 is a three-dimensional view showing an evaporator for a heat conduction unit according to a second embodiment of the present invention.
FIG. 12 is a cross-sectional view showing the path of the refrigerant in the evaporator for the heat conduction unit of FIG. 11;
13 is a conceptual diagram showing the positions of the refrigerant inlet and the refrigerant discharge port in the refrigerant passage of the first row among the plurality of rows in FIG.
14 to 17 are conceptual diagrams for explaining various embodiments of the refrigeration cycle and the deep cycle system of the present invention.
18 is a block diagram for explaining a control apparatus for a refrigerator according to the present invention.

Hereinafter, a refrigerator according to the present invention will be described in detail with reference to the drawings. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be obscured.

In the present specification, the cooling room means a refrigerator room or a freezer room, and the deep room means a room where food can be stored at a temperature lower than that of the freezer room, and usually means a storage room capable of maintaining a temperature of -40 degrees or less.

2 is a perspective view of a refrigerator according to the present invention.

The outer appearance of the refrigerator is formed by the main body 100 and the door 110.

The main body 100 includes an outer case and an inner case.

The outer case forms the remaining outer surface of the refrigerator except for the front portion of the refrigerator formed by the door 110. [

2 shows a bottom freezer type refrigerator in which a refrigerating compartment 102 is provided at an upper portion of a main body 100 and a freezing compartment 103 is provided at a lower portion thereof. However, the present invention is not limited to the bottom freezer type refrigerator. The present invention relates to a top-mount type refrigerator having a side-by-side type refrigerator in which a refrigerating chamber 102 and a freezing chamber 103 are disposed on the left and right, a freezing chamber 103 disposed on the refrigerating chamber 102, The refrigerator of the present invention can be applied.

For example, a cold discharge duct may be installed on the rear wall of the freezing chamber 103. A heat exchange chamber (101) for supplying cold air to the freezing chamber (103) is formed in a space that is visually obscured by the cold discharge duct. The cold air discharge duct is provided with a cold air discharge port 101a connected to the freezing chamber 103 so that the cold air is supplied to the freezing chamber 103 through the cold air discharge port 101a.

14) and an evaporator 134 are installed in the heat exchange chamber 101. The evaporator 134 exchanges heat between the refrigerant and the air to generate cool air and the freezer compartment fan 104 generates heat .

The configuration of the heat exchange chamber 101, the fan, and the cold air discharge port provided in the freezing chamber 103 can be equally applied to supply cold air to the refrigerating chamber 102.

The door 110 may be divided into a refrigerator compartment door 111 for opening and closing the refrigerating compartment 102 and a freezing compartment door 112 for opening and closing the freezing compartment 103 depending on the installation position.

The drawers 105 are each configured to store food by forming a space separate from other spaces of the food storage. The drawer 105 can be configured to be slidable and can be inserted into or pulled out of the food storage room by sliding movement.

A refrigeration cycle device is provided inside the main body 100. The refrigeration cycle apparatus includes a compressor 131, a condenser 132, an expansion device 133 (e.g., a capillary tube), and an evaporator 134.

3 is a cross-sectional view taken along line AA of FIG. 3, and FIG. 5 is a cross-sectional view of the deep cooling module 140 of FIG. 2, FIG. 6 is an exploded perspective view showing the deep cooling module 140 of FIG. 2, and FIG. 7 is a sectional view taken along line BB of FIG.

The core chamber 120 is installed to be fixed to the front surface of the heat exchange chamber 101. The rear portion of the core room 120 may be connected to the heat exchange chamber 101 in a communicative manner. The core room 120 may be provided with a heat insulating material to prevent heat from being transmitted from the outside.

A drawer assembly (121) is received in the core chamber (120) in a drawable manner. The drawer assembly 121 is formed in a box shape that opens upward, and food such as meat can be stored in the drawer assembly 121.

At least part of the deep cooling module 140 is provided inside the core room 120. The deep cooling module 140 cools the deep greenhouse 120 to maintain the temperature of the deep greenhouse 120 at a predetermined temperature. The deep cooling module 140 is disposed at a rear portion of the core room 120 so that the rear portion of the deep cooling module 140 can perform heat exchange with cool air flowing along the cool air passage of the heat exchange chamber 101.

The cooling cover 122 is mounted on the rear surface of the drawer assembly 121. The cooling cover 122 is provided with a fan accommodating portion 1223 and the fan accommodating portion 1223 is configured to receive the cooling fan 141 inside. The fan housing part 1223 is formed to protrude from the cooling cover 122 in a shape corresponding to the cooling fan 141 and surround the cooling fan 141. A plurality of cool air discharge holes 1222 extending in the circumferential direction are disposed concentrically on the front surface of the fan accommodating portion 1223. The cold air is discharged through the plurality of cold air discharge holes 1222 from the rear of the cooling cover 122 to the inside of the drawer assembly 121. [

A plurality of cool air suction holes 1221 are formed in the cooling cover 122 so as to extend in the vertical direction. The plurality of cold air suction holes 1221 are spaced apart from the upper and lower portions of the cooling cover 122 with a plurality of cold air discharge holes 1222 interposed therebetween. The cold air is sucked into the rear of the cooling cover 122 from inside the drawer assembly 121 through the plurality of cold air intake holes 1221. [

The cooling cover 122 may partition the core room 120 into a first accommodating portion for accommodating the deep cooling module 140 and a second accommodating portion for accommodating the draw assembly 121.

The deep cooling module 140 includes a cooling fan 141, a cold sink 143, a thermoelectric element 142, a heat insulating material 144, and a vaporizing part 145 for a heat conduction unit. The cooling fan 141, the cold sink 143, the thermoelectric element 142, the heat insulating material 144 and the evaporation portion 145 for the heat conduction unit are disposed rearward in the cooling cover 122. [

The cooling fan 141 is disposed to face the cooling cover 122 at the rear of the cooling cover 122 so that the air inside the drawer assembly 121 is cooled through heat exchange with the cold sink 143, 141 suck the air inside the drawer assembly 121 into the cold sink 143 through the cold air suction hole 1221. [ The cooling fan 141 blows cool air cooled by the cold sink 143 into the drawer assembly 121.

The cold sink 143 is made of a heat-conductive metal material such as aluminum. The rear surface of the cold sink 143 is brought into contact with the heat absorbing surface 142a of the thermoelectric element 142 and cooled by the thermoelectric element 142. [ A plurality of heat exchange fins extending upward and downward are provided on the front surface of the cold sink 143. The plurality of heat exchange fins are spaced apart from each other in the left-right direction to expand the heat exchange area of the cold sink 143 with the air sucked through the cold air suction holes 1221. Each of the plurality of heat exchange fins has a rear end integrally formed with the cold sink 143.

The thermoelectric element 142 is a device using a Peltier effect. The Peltier effect is a phenomenon in which a direct current voltage is applied across two different elements to cause heat absorption on one side and heat on the other side depending on the current direction. Since heat is absorbed on the front surface of the thermoelectric element 142 facing the cold sink 143, the heat sink 142a is called a heat absorbing surface 142a and heat is generated in the rear surface toward the evaporator 145 for the heat conducting unit And is referred to as a heat generating surface 142b.

The heat absorbing surface 142a of the thermoelectric element 142 is disposed toward the cooling cover 122 of the drawer assembly 121 and contacts the rear surface of the cold sink 143 to cool the cold sink 143. The heating surface 142b of the thermoelectric element 142 is brought into contact with the front surface of the evaporation portion 145 for the heat conduction unit so that the heat emitted from the heating surface 142b is heat-exchanged with the evaporation portion 145 for the heat conduction unit And is transferred to the refrigerant flowing inside the evaporator 145 for the heat conduction unit.

The deep cooling module 140 uses the heat absorption phenomenon of the thermoelectric element 142 to cool the cold sink 143 and drives the cooling fan 141 to cool the air inside the draw assembly 121 to the cold sink 143. [ And cool air is cooled to a cryogenic temperature by the heat exchange between the sucked air and the cold sink 143 to generate cold air and the cold air is cooled by the cooling fan 141 to the draw assembly 121, the food stored in the drawer assembly 121 can be rapidly cooled to a cryogenic temperature.

According to the deep cooling module 140, the cold sink 143, the thermoelectric element 142, and the evaporator 145 for the thermally conductive unit are brought into contact with each other in a heat-exchangeable manner. When a voltage is applied to the thermoelectric element 142, Heat is transferred from the heat absorbing surface 142a to the heat generating surface 142b inside the element 142 and heat is absorbed from the cold sink 143 due to the temperature difference between the heat generating surface 142b and the heat absorbing surface 142a The heat is discharged to the evaporator 145 for the heat conduction unit, and the food stored in the drawer assembly 121 is cooled.

The thermoelectric element 142 is smaller in size than the cold sink 143 and the evaporation portion 145 for the heat conduction unit so that a space is formed between the cold sink 143 and the evaporation portion 145 for the heat conduction unit. Accordingly, the heat is transferred from the outside to the heat absorbing surface 142a of the thermoelectric element 142, so that the temperature of the heat absorbing surface 142a may rise unintentionally.

In order to solve such a problem, a heat insulating material 144 is disposed between the cold sink 143 and the evaporation portion 145 for the heat conduction unit so as to surround the outer circumferential portion of the thermoelectric element 142. The heat insulating material 144 may prevent the external heat from being transmitted to the heat absorbing surface 142a of the thermoelectric element 142. [

The cold sink 143, the heat insulating member 144 and the evaporating unit 145 for the heat conducting unit are arranged in a state in which the cold sink 143, the thermoelectric element 142 and the evaporator 145 for the heat conducting unit are in contact with each other, Can be coupled by fastening elements. The heat sink 144 and the evaporator 145 for the heat conduction unit are disposed so as to be in contact with each other in order from the front to the back of the heat sink 144. The four screws are connected to the cold sink 143, Through the four sides of the upper, lower, left, and right edges of the evaporator 145 for the heat conduction unit.

2, the evaporator 145 for the heat conduction unit communicates with the heat exchange chamber 101 through a communication hole formed in the heat exchange chamber 101. [ 14) and an evaporator 134 are provided in the heat exchange chamber 101 and the freezer compartment fan 104 is provided with a freezing chamber fan 104 (corresponding to the second fan in the claims) (Not shown). The evaporator 145 for the heat conduction unit can be cooled by the cold air of the heat exchange chamber 101. [

8 is a conceptual view showing a state in which a refrigerant passage 1463 is formed in the evaporator 145 for a heat conduction unit according to the first embodiment of the present invention, and FIG. 9 is a cross-sectional view of the first and second heat exchange plates FIG. 10 is a conceptual view showing a state in which the refrigerant passage 1463 is formed on the inner surface of the first heat exchange plate 1461 in FIG.

The evaporator 145 for the heat conduction unit is configured to cool the heat generating surface 142b of the thermoelectric element 142 using the refrigerant. The evaporator 145 for the heat conduction unit is coupled to the plurality of heat exchange plates 146 to be in contact with each other.

8 may include a first heat exchange plate 1461 and a second heat exchange plate 1462. The first heat exchange plate 1461 and the second heat exchange plate 1462 may have the same structure.

The first and second heat exchange plates 1461 and 1462 may be separately designed and combined or may be integrally formed.

A part of the first heat exchange plate 1461 is disposed on the heat generating surface 142b of the thermoelectric element 142 and is in contact with the heat generating surface 142b. A first refrigerant flow channel groove 1463a may be formed on the inner surface of the first heat exchange plate 1461. [

On the other hand, the refrigerant flow grooves may be formed on either one of the first and second heat exchange plates 1461 and 1462, respectively, and may be formed on the first and second heat exchange plates 1461 and 1462, The refrigerant flow path 1463 may be formed.

In addition, the refrigerant pipe may be formed directly in the evaporator 145 for the heat-conducting unit, or may be formed so that the refrigerant pipe is in contact with the outside of the evaporator 145 for the heat-conducting unit.

The refrigerant flow path 1463 is formed in a curved shape.

A refrigerant suction port 1464 or a refrigerant discharge port 1465 may be formed on one surface of the heat exchange plate 146. [ The coolant inlet port 1464 and the coolant outlet port 1465 may be vertically protruded from the rear surface of the second heat exchange plate 1462. The refrigerant suction port 1464 may be connected to the refrigerant pipe of the evaporator 134 by a refrigerant pipe 137. The refrigerant discharge port 1465 may be connected to the compressor 131 by a refrigerant pipe 137.

The surface 142b of the thermoelectric element 142 has a surface temperature different from that of the heating surface 142b of the thermoelectric element 142, It is preferable to provide a coolant inlet port 1464 of the coolant inlet port 145.

Since the surface temperature of the heating surface 142b of the thermoelectric element 142 is relatively higher than that of the peripheral portion of the thermoelectric element 142, the coolant inlet port 1464 is preferably designed to be located at the center of the thermoelectric element 142.

Since the surface temperature of the evaporation portion 145 for the heat conduction unit that exchanges heat with the thermoelectric element 142 also differs, the surface temperature of the evaporation portion 145 for the heat conduction unit is the highest It is preferable to provide a coolant inlet port 1464.

Since the surface temperature of the evaporator 145 for the heat conduction unit is relatively higher than that of the peripheral portion, it is preferable that the refrigerant inlet 1464 is designed to be positioned at the center of the evaporator 145 for the heat conduction unit.

Even if the coolant inlet port 1464 is formed at a position corresponding to the periphery of the thermoelectric element 142 or the evaporator portion 145 for the heat conduction unit, the introduced coolant flows into the thermoelectric element 142, To flow into the center of the body 145 first, and then to flow back to the periphery again.

On the other hand, it is desirable to design the refrigerant piping density at the center of the thermoelectric element 142 and the evaporation portion 145 for the heat conduction unit to be higher than the density of the refrigerant piping at the peripheral portion.

In other words, in order to maximize the cooling efficiency of the heat generating surface of the thermoelectric element to reach the deep temperature, the heat exchanging amount at the central portion per area in the thermoelectric element or the evaporation portion 145 for the heat conduction unit is designed to be larger than the heat exchange amount with the refrigerant at the peripheral portion .

The radius of curvature of the refrigerant passage 1463 becomes larger from the refrigerant inlet 1463c to the refrigerant outlet 1463d.

When the first and second heat exchange plates 1461 and 1462 are separately designed and combined, a receiving protrusion is formed to protrude in the thickness direction of the heat exchange plate 146 at the rim of the second heat exchange plate 1462, The protrusion may be configured to surround the rim of the first heat exchange plate 1461. A sealing member may be inserted along the inner surface of the receiving projection portion to seal the gap between the first and second heat exchange plates 1462. [

FIG. 11 is a three-dimensional view showing the evaporator 245 for the heat conduction unit according to the second embodiment of the present invention, FIG. 12 is a cross-sectional view showing the flow path of the refrigerant in the evaporation portion 245 for the heat conduction unit of FIG. 13 is a conceptual diagram showing the positions of the refrigerant inlet port 2464 and the refrigerant outlet port 2465 in the refrigerant passage 2463 of the second row of the plurality of rows in FIG.

The refrigerant flow path 2463 shown in FIG. 12 is formed in two rows in the thickness direction of the heat exchange plate 246. Each of the refrigerant channels 2463 formed in the plurality of rows is formed in a curved shape. The refrigerant channels 2463 formed in the plurality of rows are connected to each other at the outer edge of the heat exchange plate 146.

In this embodiment, the refrigerant suction port 2464 and the refrigerant discharge port 2465 may be positioned adjacent to each other. 11, the coolant inlet port 2464 may be formed in the center of the heat exchange plate 246, and the coolant outlet port 2465 may be formed in the diagonally right downward direction of the coolant inlet port 2464.

Meanwhile, the refrigerant pipe may be formed directly in the evaporator 245 for the heat conduction unit, or may be formed so that the refrigerant pipe is in contact with the outside of the evaporation unit 245 for the heat conduction unit. A plurality of rows of the refrigerant pipe may be formed on one surface of the evaporator 245 for the heat conduction unit and a plurality of different raw materials of the refrigerant pipe may be formed on the other surface of the evaporator 245 for the heat conduction unit have.

13 shows a second refrigerant passage 2463b of the plurality of rows, and a refrigerant inlet 2463c is formed at the center of the refrigerant passage 2463b of the second row, and the refrigerant passage 2463b is formed at the outer edge of the refrigerant passage of the first row And the refrigerant passage 2463b of the second row is connected. The refrigerant outlet 2463d of the refrigerant passage 2463b is spaced apart from the refrigerant inlet 2463c in the right lower diagonal direction and is connected to the center of the refrigerant passage of the first row.

The refrigerant sucked through the refrigerant suction port 2464 flows into the center of the refrigerant passage 2463 of the first row in the thickness direction of the heat exchange plate 246 and flows along the refrigerant flow path 2463 of the first row The refrigerant flows into the refrigerant passage 2463b in the second row communicating with the refrigerant passage 2463 in the first row at the outer edge portion of the heat exchange plate 246 and then flows into the refrigerant passage 2463b in the second row, And is discharged through the refrigerant discharge port 2465. The refrigerant discharged from the refrigerant discharge port 2465 flows through the refrigerant discharge port 2465,

The front face of the heat exchange plate 246 is in contact with the heat generating face 142b of the thermoelectric element 142 and the refrigerant of the heat exchange plate 246 is heat exchanged with the heat generating face 142b of the thermoelectric element 142. [ Thus, the heat released from the heat generating surface 142b of the thermoelectric element 142 is transferred to the refrigerant of the heat exchange plate 246. [

14 to 17 are conceptual diagrams for explaining various embodiments of the refrigeration cycle and the deep cycle system of the present invention. FIG. 14 is a first embodiment of the refrigeration cycle and the deep cycle system 130 of the present invention, FIG. 15 is a second embodiment of the refrigeration cycle and the deep cycle system 230 of the present invention, and FIG. FIG. 17 is a fourth embodiment of the refrigeration cycle and the deep cycle system 430 of the present invention, which is a third embodiment of the refrigeration cycle and the deep cycle system 330. FIG.

The evaporator 134 includes a freezer-applied evaporator 1341 (hereinafter referred to as a first evaporator 1341) provided in the heat exchange chamber 101 of the freezer compartment 103 to provide cool air to the freezer compartment 103, And a refrigerator-use evaporator 1342 (hereinafter referred to as a second evaporator 1342) that is provided in the heat exchange chamber 101 and provides cold air to the refrigerating chamber 102. The first and second evaporators 1341 and 1342 are connected to each other in parallel by a refrigerant pipe 137. (For example, the first evaporator 1341 and the second evaporator 1342) for separating the refrigerator compartment evaporator 1342 and the freezer compartment evaporator 1341 from each other, the refrigerating and freezer evaporators 1341 and 1342 Will be collectively referred to as an evaporator 134.

The first evaporator 1341 and the second evaporator 1342 in the condenser 132 are provided with a both-way valve 135 or a three-way valve 135. The first evaporator 1341 and the second evaporator 1342, It is possible to distribute the refrigerant flow rate provided to the refrigerant circuit. In the case of the two-way valve 135, the refrigerant is selectively supplied to the first and second evaporators 1341 and 1342.

The capillary tube, which is the expansion device 133, includes a first capillary tube 1331 and a second capillary tube 1332. The first capillary tube 1331 is installed in a first branch pipe 1371 extending from the three-way valve 135 to the first evaporator 1341 and the second capillary tube 1332 is installed in the second evaporator 1341 from the three- To a second branch pipe 1372 extending to the second branch pipe 1342.

The compressor 131 may include first and second compressors provided in the main body 100. The first compressor 1311 may be installed in the heat exchange chamber 101 behind the freezing chamber 103. The first compressor 1311 is connected to the first evaporator 1341 to compress the refrigerant discharged from the first evaporator 1341 and circulate the refrigerant.

A second compressor (not shown) may be provided in the heat exchange chamber 101 behind the refrigerating chamber 102. The second compressor (not shown) is connected to the second evaporator 1342 to compress the refrigerant discharged from the second evaporator 1342 and circulate the refrigerant.

The refrigeration cycle system 130 shown in FIG. 14 includes one compressor 131 and two evaporators 134.

A three-way valve 135 is disposed at a position where the condenser 132 is disposed at the rear end (downstream side) of the compressor 131 and the two ends of the rear end (downstream side) of the condenser 132 are branched. A first capillary tube 1331 and a first evaporator 1341 are installed in a first branch pipe 1371 branched from the first branch pipe 1372 and a second capillary tube 1332 and a second capillary tube 1332 are installed in a second branch pipe 1372. [ (1342) may be installed. At this time, a check valve 136 is provided at the rear end of the second evaporator 1342 to prevent the refrigerant discharged from the first evaporator 1341 from flowing back to the second evaporator 1342.

The evaporator 145 for the heat conduction unit according to the present invention is connected in series with the evaporator 134. The evaporator 145 for the heat conduction unit may be disposed along with the evaporator 134 along the refrigerant pipe 137 continuously.

The refrigerant is circulated through the compressor 131, the condenser 132, the expansion device 133 or the evaporator 134 to undergo compression, condensation, expansion and evaporation processes, and the refrigerant evaporator 1342, And the refrigerant discharged from the freezer compartment evaporator 1341 are combined and then introduced into the refrigerant passage 1463 of the evaporator 145 for the heat conduction unit. The refrigerant discharged from the refrigerant passage 1463 of the evaporator 145 for the heat conduction unit flows into the compressor 131 again and circulates and repeats the compression, condensation, expansion and evaporation processes continuously.

The heat emitted from the heat generating surface 142b of the thermoelectric element 142 is heat-exchanged with the refrigerant of the evaporator 145 for the thermoelectric unit that is in contact with the heat generating surface 142b of the thermoelectric element 142 and is transferred to the refrigerant. The heat absorbing surface 142a of the thermoelectric element 142 is cooled to a cryogenic temperature by the temperature difference between the heat generating surface 142b of the thermoelectric element 142 and the heat absorbing surface 142a, So that the draw assembly 121 of the core chamber 120 is cooled.

One side of the evaporator 145 for the heat conduction unit exchanges heat with the heat generating surface 142b of the thermoelectric element 142 and the other side conducts heat exchange with the refrigerant in the refrigerant tube formed inside or on the surface thereof through conduction. The evaporation portion 145 for the heat conduction unit may be cooled through heat exchange with the cold air blown by the second fan 104 disposed inside the heat exchange chamber 101. [ The heat emitted from the heat generating surface 142b of the thermoelectric element 142 is not only transferred to the refrigerant flowing along the refrigerant flow path 1463 of the evaporation portion 145 for the heat conduction unit but also flows into the heat exchanging chamber 101 And the heat radiation efficiency can be further increased.

According to the first embodiment of the present invention, the evaporator 145 for the heat conduction unit is connected in series with the evaporator 134 so that the refrigerating compartment 102, the freezing compartment 103 and the cooling compartment (the refrigerating compartment 102 and the freezing compartment 103 ) And the core room 120 may be operated simultaneously or the core room 120 may be operated alone.

The embodiment of FIG. 14 has the following advantages over the prior art.

The refrigerator compartment evaporator 1372 and the freezer compartment evaporator 1371 are alternately operated by the refrigerant switch valve 135 in the refrigeration cycle 130 (1 comp. 2eva cycle) including one compressor and two evaporators. That is, when the refrigerating chamber is cooled after the refrigerant is switched to the refrigerating chamber and the refrigerating chamber temperature reaches a preset temperature (if satisfied), the refrigerant is switched to the freezing chamber to cool the freezing chamber. In the case where the refrigerant is switched to the refrigerating chamber or switched to the freezing chamber, the refrigerant flows to the evaporator 145 for the heat conduction unit, so that the sudden temperature drop of the chamber 120 can be prevented despite the alternate operation. Of course, when the temperatures of the refrigerating chamber and the freezing chamber are both satisfied, the evaporating ability for cooling the chamber 142 can be improved by blocking the inflow of cold air into the cooling chamber in the same manner as the above method. A method of cutting off the supply of cold air to the cooling chamber is as follows. The damper for controlling the inflow of the cool air into the cooling chamber is shut off or the blowing fan for the evaporator for cooling the cooling chamber (in the case where it is installed separately from the cooling fan 141 (corresponding to the first fan in the claims) Or the refrigerant switching valve 135 may be switched to block the refrigerant from flowing to the evaporator for the cooling chamber whose temperature is satisfied.

The refrigeration cycle system 230 shown in FIG. 15 includes one compressor 131 and two evaporators 134, which are different from the first embodiment shown in FIG. 14 in that the bypass flow path 138 and the third A capillary tube 1333 is additionally included. By adding the bypass flow path 138, it is possible to shut off the flow of the refrigerant to the evaporator 134 for cooling the cooling chamber and to control the refrigerant to flow only to the evaporator 145 for the heat conduction unit. The other components according to the second embodiment are the same as or similar to those of the first embodiment, and therefore, detailed description thereof will be omitted.

One side of the bypass passage 138 is branched from the upstream side of the evaporator for the cooling chamber 134 and merged into the first branch pipe 1371 or the second branch pipe 1372 and then the evaporator 145 for the heat- And connected to the refrigerant inlet. And the other side of the bypass passage 138 may be directly connected to the refrigerant inlet 1464 of the evaporator 145 for the heat conduction unit.

The refrigerant may be supplied to the evaporator 145 for the heat conduction unit at the same time or selectively through the evaporator 134 and the bypass flow path 138.

According to the second embodiment of the present invention, the bypass flow path 138 can be used in the single operation of the core room 120.

Here, the valve 135 may be applied as a four-way valve.

The refrigeration cycle system 330 shown in FIG. 16 can be applied to a refrigeration cycle system 330 including one compressor 131 and one evaporator 3341.

A refrigeration cycle and a freezing chamber can be cooled by one refrigeration cycle, and is connected to the evaporation unit 145 for the heat conduction unit. The evaporation unit 145 for the heat conduction unit may be connected to only one of the two cycles, or may be connected to both of the two cycles. Alternatively, the cycle may be independently configured as two, one for the refrigerator room and the other for the refrigerator room. .

The other components according to the third embodiment are the same as or similar to those of the first embodiment, and a detailed description thereof will be omitted.

The refrigeration cycle system 430 according to the fourth embodiment of FIG. 17 further includes a bypass channel 438 branched from the refrigerant pipe 137. Other elements are the same as or similar to those of the embodiment of FIG. 15, and a duplicate description will be omitted.

18 is a block diagram for explaining a control apparatus for a refrigerator according to the present invention.

Referring to FIG. 18, the control apparatus of the present invention can be largely constituted by a detection unit 151, a controller 150 and an operation unit.

The detection unit 151 includes a first temperature sensor 1521 for sensing the temperature of the refrigerating compartment, a second temperature sensor 1522 for sensing the temperature of the freezing compartment, a third temperature sensor 1523 for sensing the temperature of the heart chamber, And a deep temperature mode selection unit 1524. The third temperature sensor 1523 may be provided inside the core room 120 to directly sense the temperature of the core room 120. The temperature of the core room 120 may be indirectly provided . On the other hand, the third temperature sensor may be configured without.

The deep-mode selecting unit 1524 is operable to allow the user to select the deep-mode. On the other hand, the core room 120 is set to default, and the consumer can provide only the set temperature to be adjusted.

Hereinafter, a control method of a refrigerator according to the present invention will be described.

When the deep temperature mode is selected, the cooling chambers 102 and 103 and the core room 120 are cooled simultaneously if the cooling chamber temperature and the core room temperature are both unsatisfactory, based on the recognized cooling chamber temperature and the core room 120 temperature . That is, the compressor 131 is driven, the cool air is introduced into the cooling chambers 102 and 103, and the thermoelectric element 142 and the first fan 141 are driven. When the blowing fans 1041 and 1042 for the cooling chamber evaporator 134 and the blowing fan 104 for the evaporation unit 145 for the heat conduction unit are installed separately, the blowing fans 1041, 1042, and 104 are driven do. When a damper for blocking the inflow of cold air into the cooling chambers 102, 103 is provided, the damper is controlled to be opened. When only the temperature of the cooling chambers 102 and 103 is satisfied, cooling of the cooling water in the cooling chambers 102 and 103 is blocked to drive only the cooling of the core room 120. That is, when there are the blowing fans 1041 and 1042 and the damper for only the satisfactory cooling chambers 102 and 103, the driving of the blowing fans 1041 and 1042 is stopped or the damper is closed. In the case of a cycle in which two or more cooling chamber evaporators 134 are connected in parallel to one compressor 131, it is possible to switch the refrigerant switching valve 135 to block refrigerant flow into the satisfactory cooling chambers 102 and 103. When the temperature of the core room 120 is satisfactory, cooling of the core room 120 is terminated. The driving of the thermoelectric element 142 and the first fan 141 is terminated. Further, when there is the blowing fan 104 for only the evaporator 145 for the heat conduction unit, the driving of the blowing fan concerned is terminated.

According to another embodiment, if the temperature of the cooling chambers 102 and 103 is unsatisfactory, the cooling chambers 102 and 103 and the core room 120 are cooled simultaneously based on the recognized temperatures of the cooling chambers 102 and 103 when the deep- When the temperature of the cooling chambers 102 and 103 is satisfactory, driving for only cooling of the core room 120 is started. The driving time for simultaneous cooling and the driving time for cooling the core room 120 alone When the predetermined time has elapsed, the cooling of the core room 120 is terminated. The method of simultaneous cooling and the method of single cooling are the same as the first embodiment.

According to another embodiment, by simultaneously releasing the simultaneous cooling function of the cooling chambers 102 and 103 and the core room 120, only one of the cooling chambers 102 and 103 or the core room 120 is driven independently . For example, the refrigerator compartment 102 and the heart chamber 120 can be set such that the cooling of the refrigerator compartment 102 takes precedence, and the freezing compartment 103 and the heart chamber 120 can be simultaneously cooled and independently cooled have. The method of simultaneous cooling and the method of single cooling are the same as the first embodiment.

Thus, according to the control method of the refrigerator according to the present invention, the evaporation capacity of the evaporator 134 and the evaporation unit 145 for the heat conduction unit 145 is excessively designed during simultaneous operation of the cooling chamber and the core room 120 . For example, when the required evaporation capacity for the cooling chamber and the required evaporation capacity of the evaporation unit 145 for the heat conduction unit are equal to 70 to 30, the conventional total evaporation capacity is designed to be 100, Can be designed as 70.

Further, according to the control method of the refrigerator of the present invention, it is possible to efficiently operate the evaporation capacity at the time of simultaneous operation of the cooling chamber and the core room (120). Also, the cooling loss caused by the alternate operation of the existing cooling chamber and the core room 120 can be eliminated.

It will be apparent to those skilled in the art that various modifications, substitutions and alterations can be made hereto without departing from the spirit and scope of the invention as defined by the appended claims. will be.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. .

The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be interpreted as being included in the scope of the present invention.

100:
101: heat exchange chamber
101a: cold air outlet
102: Refrigerator
103: Freezer
104: blowing fan
1041: First blowing fan (blowing fan for freezing room)
1042: Second blowing fan (blowing fan for refrigerator)
105: Drawers
106: Shelf
107: Basket
110: Door
111: Refrigerator door
112: Freezer door
113: Hinge
120: heart chamber
121: Drawer assembly
122: cooling cover
1221: Cold air intake hole
1222: Cold discharge hole
1223:
130,230,330,430: Refrigeration cycle system
131: Compressor
1311: first compressor
132: condenser
133: Expansion device
1331, 3331, 4331: First capillary tube
1332: Second capillary tube
1333,4333: Third capillary tube
134: Evaporator
1341, 3341, 4341: First Evaporator (Evaporator for Freezer)
1342: Second evaporator (evaporator for refrigerator)
135: Valve
136: Check valve
137: Refrigerant piping
1371,4371: First branch piping
1372: Second branch piping
138,438: Bypass channel
140: deep cooling module
141: First fan (cooling fan)
142: thermoelectric element
142a: heat absorption surface
142b:
143: Cold sink
144: Insulation
145, 455: evaporation part for heat conduction unit
146, 246: Heat exchange plate
1461: first heat exchange plate
1462, 2462: the second heat exchange plate
1463, 2463:
1463a: first refrigerant flow groove
1463b and 2463b: the second refrigerant flow grooves
1463c, 2463c: refrigerant inlet
1463d, 2463d: Refrigerant outlet
1464: Refrigerant inlet
1465: Refrigerant discharge port
150: controller
151:
1521: first temperature sensor
1522: second temperature sensor
1523: third temperature sensor
1524: deep temperature mode selection unit

Claims (12)

A heat exchange chamber; Refrigerator room; A freezing chamber positioned adjacent to the refrigerating chamber and disposed in front of the heat exchange chamber; And a core chamber disposed inside the freezer chamber and maintained at a temperature lower than a temperature of the freezer chamber;
A refrigerator compartment door for opening and closing the refrigerator compartment;
A freezing chamber door for opening and closing the freezing chamber;
A drawer assembly housed in the core room;
An evaporator provided inside the heat exchange chamber;
A compressor for allowing the refrigerant to flow to the evaporator; And
And a deep cooling module for cooling the air in the core room,
The deep cooling module includes:
A thermoelectric element having a heat generating surface and a heat absorbing surface arranged to face the heat generating surface;
A cold sink in which one side is in heat-exchangeable contact with the heat absorbing surface of the thermoelectric element;
An evaporator for a heat conduction unit, one side of which is in contact with the heat generating surface of the thermoelectric element, the other side of which is connected to the refrigerant tube of the evaporator, and which transfers the heat emitted from the heat generating surface of the thermoelectric element to the refrigerant through heat exchange;
A first fan for exchanging heat between the air in the core room and the other side of the cold sink; And
And a second fan for exchanging heat between the air in the heat exchange chamber and the other side of the evaporation portion for the heat conduction unit,
Wherein the evaporator for the compressor, the condenser, the expansion device, the evaporator and the heat conduction unit is connected by a circulating flow path,
The circulation flow path,
The refrigerant is connected to the upstream side flow path of the evaporator so that the refrigerant bypasses the evaporator and passes through the evaporation portion for the heat conduction unit and the other side is connected to the connection flow path between the downstream side of the evaporator and the upstream side of the evaporation portion for the heat conduction unit Further comprising:
Wherein the evaporator for the heat conduction unit is spaced apart from the evaporator and downstream of the bypass flow path, and the evaporator and the evaporation portion for the heat conduction unit are connected in series to each other for operation for cooling the refrigerating chamber or the freezing chamber, Refrigerator at the same time. The method according to claim 1,
Wherein the evaporator for the heat-
A heat exchange plate in contact with the heat generating surface and performing heat exchange with the heat generating surface; And
And a refrigerant flow path formed in the heat exchange plate and allowing the refrigerant to flow to exchange heat between the refrigerant and the heat exchange plate. delete delete The method according to claim 1,
Wherein the evaporator comprises:
A first evaporator for cooling the freezing chamber; And
A second evaporator for cooling the refrigerating compartment;
Wherein the refrigerator is a refrigerator. 6. The method of claim 5,
The compressor includes:
A first compressor connected to the first evaporator and compressing the refrigerant discharged from the first evaporator; And
A second compressor connected to the second evaporator and compressing the refrigerant discharged from the second evaporator;
Wherein the refrigerator is a refrigerator. The method according to claim 1,
A first temperature sensor for sensing a temperature of the refrigerating compartment;
A second temperature sensor for sensing a temperature of the freezing chamber;
A controller for controlling the compressor, the thermoelectric element, and the first and second fans according to the temperatures of the refrigerating chamber, the freezing chamber, and the core room;
. The method according to claim 1,
Wherein a heat exchange amount between a central portion having a relatively high temperature on the heat generating surface and the refrigerant is greater than a heat exchange amount between a peripheral portion surrounding the central portion of the heat generating surface and the refrigerant. A main body having a heat exchange chamber, a refrigerating chamber, a freezing chamber, and a core chamber kept at a temperature lower than the temperature of the freezing chamber;
An evaporator accommodated in the heat exchange chamber;
A compressor for allowing the refrigerant to flow to the evaporator; And
And a deep cooling module for cooling the air in the core room,
The deep cooling module includes:
A thermoelectric element having a heat generating surface and a heat absorbing surface arranged to face the heat generating surface;
A cold sink in which one side is in heat-exchangeable contact with the heat absorbing surface of the thermoelectric element;
An evaporator for a heat conduction unit, one side of which is in contact with the heat generating surface of the thermoelectric element, the other side of which is connected to the refrigerant tube of the evaporator, and which transfers the heat emitted from the heat generating surface of the thermoelectric element to the refrigerant through heat exchange;
A first fan for exchanging heat between the air in the core room and the other side of the cold sink; And
And a second fan for exchanging heat between the air in the heat exchange chamber and the other side of the evaporation portion for the heat conduction unit,
Wherein the evaporator for the compressor, the condenser, the expansion device, the evaporator and the heat conduction unit is connected by a circulating flow path,
The circulation flow path,
The refrigerant is connected to the upstream side flow path of the evaporator so that the refrigerant bypasses the evaporator and passes through the evaporation portion for the heat conduction unit and the other side is connected to the connection flow path between the downstream side of the evaporator and the upstream side of the evaporation portion for the heat conduction unit Further comprising:
Wherein the evaporator for the heat conduction unit is spaced apart from the evaporator and downstream of the bypass flow path, and the evaporator and the evaporation portion for the heat conduction unit are connected in series to each other for operation for cooling the refrigerating chamber or the freezing chamber, At the same time,
A blowing fan for blowing the cool air generated in the evaporator to the refrigerator compartment and the freezer compartment;
A detection unit having a first temperature sensor for sensing the temperature of the refrigerating compartment and a second temperature sensor for sensing the temperature of the freezing compartment;
Receiving a detection signal from the detection section according to the control method of the refrigerator further comprising a controller for controlling the compressor, the blowing fan, the first fan and the thermoelectric device according to the temperature of the refrigerating chamber, freezing chamber and the center in a greenhouse,
Driving the compressor;
Applying a voltage to the thermoelectric element to cool the core room;
Controlling the compressor, the thermoelectric element, the first fan, and the blower fan according to the temperature of each of the recognized refrigerator compartment, the freezer compartment, and the core room;
And a controller for controlling the refrigerator. 10. The method of claim 9,
Wherein the detection unit comprises a third temperature sensor for sensing the temperature of the core room. 11. The method of claim 10,
The step of controlling the compressor, the thermoelectric element, the first fan,
If both the recognized cooling chamber temperature and the core room temperature are unsatisfactory, the cooling chamber and the core room are simultaneously cooled. If the temperature of the cooling chamber is satisfactory, the cooling air entering the cooling chamber is blocked, Wherein the refrigerator is driven only for cooling. 10. The method of claim 9,
The step of controlling the compressor, the thermoelectric element, the first fan,
If the temperature of the cooling chamber is unsatisfactory based on the recognized cooling chamber temperature, driving is performed to simultaneously cool the cooling chamber and the core room, and if the temperature of the cooling chamber is satisfactory, Wherein cooling of the core room is terminated when the sum of the driving time for simultaneous cooling and the driving time for single core room cooling exceeds a predetermined time.

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