Refrigerator

Abstract

The disclosed refrigerator comprises: a main body having storage compartments; a cooling part for cooling air in the storage compartments; and a heat dissipation part for dissipating the heat of the cooling part. The cooling part includes a Peltier device. The heat dissipation part includes a water jacket, a radiator, and a coolant flow path. The water jacket comes into contact with a heat dissipation surface of the Peltier device so as to allow the heat dissipated from the heat dissipation surface to be absorbed by a coolant. The radiator is disposed in the main body so as to be spaced apart from the cooling part. The radiator dissipates heat absorbed by the coolant in the water jacket to the outside of the main body. The coolant flow path circulates the coolant between the water jacket and the radiator.

Description

refrigerator

[0001] The present disclosure relates to a refrigerator.

[0002] There is a refrigerator that cools the air inside the storage compartment using a Peltier element. A Peltier element is a plate-shaped semiconductor that, when current flows through it, becomes a cooling surface on one side and a heat-dissipating surface on the other. According to Japanese Patent No. 7105816, heat sinks and fans are placed on each side of the Peltier element to enhance cooling performance on the cooling surface and heat dissipation efficiency on the heat-dissipating surface.

[0003] According to one aspect of the present disclosure, a refrigerator comprises a main body, a cooling unit, and a heat dissipation unit. A storage compartment is provided in the main body. The cooling unit cools air within the storage compartment. The cooling unit comprises a Peltier element that, when current is supplied, transfers heat from a cooling surface facing the storage compartment to a heat dissipation surface. The heat dissipation unit comprises a water jacket, a radiator, and a coolant passage. The water jacket contacts the heat dissipation surface of the Peltier element and absorbs heat dissipated from the heat dissipation surface into a coolant. The radiator is disposed in the main body so as to be spaced apart from the cooling unit. The radiator dissipates heat absorbed by the coolant in the water jacket to the outside of the main body. The coolant passage circulates the coolant between the water jacket and the radiator.

[0004] FIG. 1 is a perspective view showing a schematic configuration of a refrigerator according to one embodiment of the present disclosure.

[0005] FIG. 2 is a partial rear view showing a schematic configuration of a refrigerator according to one embodiment of the present disclosure.

[0006] FIG. 3 is a partial side view showing a schematic configuration of a refrigerator according to one embodiment of the present disclosure.

[0007] FIG. 4 is a schematic rear view of a water jacket according to one embodiment of the present disclosure.

[0008] FIG. 5 is a schematic side view of a water jacket according to one embodiment of the present disclosure.

[0009] FIG. 6 is a schematic rear view showing the structure of the internal space of a water jacket according to one embodiment of the present disclosure.

[0010] FIG. 7 is a cross-sectional view taken along line AA' of a water jacket according to one embodiment of the present disclosure illustrated in FIG. 6.

[0011] Figure 8 is a schematic diagram of a refrigerator according to one embodiment of the present disclosure.

[0012] It should be understood that the various embodiments of the present disclosure and the terminology used therein are not intended to limit the technical features described in the present disclosure to specific embodiments, but rather include various modifications, equivalents, or substitutes of the embodiments.

[0013] In connection with the description of the drawings, similar reference numerals may be used for similar or related components.

[0014] The singular form of a noun corresponding to an item may include one or more of said items, unless the relevant context clearly indicates otherwise.

[0015] In this disclosure, each of the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof.

[0016] The term "and / or" includes any combination of a plurality of related described elements or any one of a plurality of related described elements.

[0017] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish one component from another and do not limit the components in any other respect (e.g., importance or order).

[0018] In addition, terms such as 'front', 'rear', 'top', 'bottom', 'side', 'left', 'right', 'upper', and 'lower' used in the present disclosure are defined based on the drawings, and the shape and position of each component are not limited by these terms.

[0019] Terms such as "include" or "have" are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the present disclosure, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0020] When a component is said to be “connected,” “coupled,” “supported,” or “in contact with” another component, this includes not only cases where the components are directly connected, coupled, supported, or in contact, but also cases where the components are indirectly connected, coupled, supported, or in contact through a third component.

[0021] When we say that a component is "on" another component, this includes not only cases where the component is in contact with the other component, but also cases where there is another component between the two components.

[0022] A refrigerator according to one embodiment may include a body.

[0023] The "body" may include an inner case, an outer case disposed on the outside of the inner case, and an insulating material provided between the inner case and the outer case.

[0024] The "inner case" may include at least one of a case, a plate, a panel, or a liner forming a storage compartment. The inner case may be formed as a single body, or may be formed by assembling a plurality of plates. The "outer case" may form the outer appearance of the main body, and may be joined to the outer side of the inner case so that insulation is placed between the inner case and the outer case.

[0025] "Insulation" can insulate the interior and exterior of a storage room so that the temperature inside the storage room can be maintained at a set temperature without being affected by the external environment. In one embodiment, the insulation can include foam insulation. The foam insulation can be formed by injecting and foaming urethane foam, a mixture of polyurethane and a foaming agent, between the inner and outer layers.

[0026] In one embodiment, the insulation may include a vacuum insulation material in addition to the foam insulation, or the insulation may consist solely of the vacuum insulation material instead of the foam insulation. The vacuum insulation material may include a core material and an outer shell material that accommodates the core material and seals the interior under a vacuum or near-vacuum pressure. However, the insulation material is not limited to the foam insulation or vacuum insulation material described above, and may include various materials that can be used for insulation.

[0027] A "storage room" may include a space defined by an interior wall. The storage room may further include an interior wall defining a corresponding space. The storage room may store various items, such as food, medicine, and cosmetics, and the storage room may be configured to be open on at least one side for the entry and exit of items.

[0028] A refrigerator may include one or more storage compartments. When a refrigerator includes two or more storage compartments, each compartment may have a different purpose and be maintained at different temperatures. To achieve this, each storage compartment may be separated from the others by a partition wall containing insulation.

[0029] The storage room may be designed to maintain an appropriate temperature range depending on its intended use, and may include a "refrigerator," a "freezer," or a "variable temperature room," which are distinguished by their intended use and / or temperature range. A refrigerator may be maintained at a temperature appropriate for refrigerating items, and a freezer may be maintained at a temperature appropriate for freezing items. "Refrigeration" may mean cooling items to a temperature that does not freeze them, and for example, a refrigerator may be maintained at a temperature ranging from 0 degrees Celsius to +7 degrees Celsius. "Freezing" may mean cooling items to freeze them or keep them in a frozen state, and for example, a freezer may be maintained at a temperature ranging from -20 degrees Celsius to -1 degree Celsius. A variable temperature room may be used as either a refrigerator or a freezer, at the user's option or not.

[0030] In addition to names such as "refrigerator," "freezer," and "variable temperature room," a storage room may also be called by various other names such as "vegetable room," "fresh room," "cooling room," and "ice room." The terms "refrigerator," "freezer," and "variable temperature room" used hereinafter should be understood to encompass storage rooms having corresponding uses and temperature ranges.

[0031] In one embodiment, the refrigerator may include at least one door configured to open and close an open side of a storage compartment. The door may be configured to open and close one or more storage compartments, or a single door may be configured to open and close multiple storage compartments. The door may be installed on the front of the main body in a pivotal or sliding manner.

[0032] The "door" may be configured to seal the storage compartment when the door is closed. The door may include insulation, similar to the body, to insulate the storage compartment when the door is closed.

[0033] According to one embodiment, the door may include a door outer panel forming the front of the door, a door inner panel forming the back of the door and facing the storage compartment, an upper cap, a lower cap, and door insulation provided on the interior of these.

[0034] The door inner panel may be provided with a gasket that seals the storage compartment by contacting the front of the body when the door is closed. The door inner panel may include a dyke that protrudes rearward to accommodate a door basket for storing items.

[0035] In one embodiment, the door may include a door body and a front panel detachably coupled to the front side of the door body and forming the front of the door. The door body may include a door outer panel forming the front of the door body, a door inner panel forming the rear of the door body and facing the storage compartment, an upper cap, a lower cap, and door insulation provided inside these.

[0036] Depending on the arrangement of the door and storage compartment, refrigerators can be classified into French door type, side-by-side type, bottom mounted freezer (BMF), top mounted freezer (TMF), or single-door refrigerator.

[0037] According to one embodiment, the refrigerator may include a cold air supply device configured to supply cold air to the storage compartment.

[0038] A "cold air supply device" may include a system of machines, devices, electronic devices and / or combinations thereof that can generate cold air and guide the cold air to cool a storage room.

[0039] In one embodiment, the cold air supply device can generate cold air through a refrigeration cycle that includes the processes of compression, condensation, expansion, and evaporation of a refrigerant. To this end, the cold air supply device can include a refrigeration cycle device having a compressor, a condenser, an expansion device, and an evaporator capable of driving the refrigeration cycle. In one embodiment, the cold air supply device can include a semiconductor, such as a thermoelectric element. The thermoelectric element can cool a storage compartment by generating heat and cooling through the Peltier effect.

[0040] According to one embodiment, the refrigerator may include a machine room in which at least some components belonging to the cold air supply device are arranged.

[0041] The "machine room" may be designed to be partitioned and insulated from the storage room to prevent heat generated by components placed within the machine room from being transferred to the storage room. The interior of the machine room may be configured to be in communication with the exterior of the main body to dissipate heat from components placed within the machine room.

[0042] In one embodiment, the refrigerator may include a dispenser provided on the door to provide water and / or ice. The dispenser may be provided on the door so that it is accessible to a user without having to open the door.

[0043] In one embodiment, a refrigerator may include an ice-making device configured to produce ice. The ice-making device may include an ice-making tray configured to store water, an ice-separating device configured to separate ice from the ice-making tray, and an ice bucket configured to store ice produced in the ice-making tray.

[0044] According to one embodiment, the refrigerator may include a control unit for controlling the refrigerator.

[0045] The "control unit" may include a memory that stores or memorizes a program and / or data for controlling the refrigerator, and a processor that outputs a control signal for controlling a cold air supply device, etc. according to the program and / or data memorized in the memory.

[0046] Memory stores or records various information, data, commands, programs, etc. necessary for the operation of the refrigerator. Memory can store temporary data generated during the generation of control signals for controlling components within the refrigerator. Memory may include at least one of volatile memory and non-volatile memory, or a combination thereof.

[0047] The processor controls the overall operation of the refrigerator. The processor can control the components of the refrigerator by executing programs stored in memory. The processor may include a separate NPU that performs the operations of an artificial intelligence model. The processor may also include a central processing unit (CPU), a graphics processing unit (GPU), or the like. The processor may generate control signals to control the operation of the cooling system. For example, the processor may receive temperature information about the storage compartment from a temperature sensor and generate a cooling control signal to control the operation of the cooling system based on the temperature information.

[0048] Additionally, the processor may process user input of the user interface and control the operation of the user interface based on programs and / or data stored / stored in the memory. The user interface may be provided using an input interface and an output interface. The processor may receive user input from the user interface. Additionally, the processor may transmit display control signals and image data to the user interface for displaying an image on the user interface in response to the user input.

[0049] The processor and memory may be provided as a single unit or separately. The processor may include one or more processors. For example, the processor may include a main processor and at least one subprocessor. The memory may include one or more memories.

[0050] In one embodiment, a refrigerator may include a processor and memory that control all components within the refrigerator, and may include multiple processors and multiple memories that individually control the components within the refrigerator. For example, the refrigerator may include a processor and memory that control the operation of a cooling device based on the output of a temperature sensor. Additionally, the refrigerator may separately include a processor and memory that control the operation of a user interface based on user input.

[0051] The communication module can communicate with external devices, such as servers, mobile devices, and other home appliances, via a nearby access point (AP). The AP can connect the local area network (LAN) to which the refrigerator or user device is connected to the wide area network (WAN) to which the server is connected. The refrigerator or user device can then connect to the server via the WAN.

[0052] The input interface may include keys, a touchscreen, a microphone, etc. The input interface may receive user input and transmit it to the processor.

[0053] The output interface may include a display, a speaker, etc. The output interface may output various notifications, messages, information, etc. generated by the processor.

[0054] In addition to the cooling method using the refrigerant described above, a refrigerator may employ a thermoelectric cooling method using a thermoelectric element. A thermoelectric cooling refrigerator differs in that it employs a Peltier element as a thermoelectric element instead of components that perform the cooling cycle of compressing, expanding, evaporating, and condensing the refrigerant. Therefore, the above description of a refrigerator using a refrigerant for cooling can be equally applied to a thermoelectric cooling refrigerator, except for the structure related to the refrigerant circulation. In a refrigerator using a thermoelectric cooling method, since the Peltier element and the heat sink and fan mounted on the cooling surface and heat dissipation surface of the Peltier element are arranged as a single assembly in the refrigerator body, the degree of freedom in the arrangement of each component within the refrigerator body may be reduced.

[0055] The present disclosure provides a refrigerator that employs a Peltier element and can increase the degree of freedom in the arrangement of each component within the refrigerator body. The present disclosure also provides a refrigerator that employs a Peltier element and can ensure cooling performance within a storage compartment.

[0056] However, the technical problems to be achieved in the present disclosure are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present disclosure belongs from the description below.

[0057] Hereinafter, embodiments of a refrigerator according to the present disclosure will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, portions irrelevant to the description have been omitted for clarity of description, and similar reference numerals have been used throughout the specification to designate similar elements.

[0058]

[0059] Fig. 1 is a perspective view schematically showing the configuration of a refrigerator (100) according to one embodiment of the present disclosure. Fig. 2 is a partial rear view schematically showing the configuration of a refrigerator (100) according to one embodiment of the present disclosure. Fig. 3 is a partial side view schematically showing the configuration of a refrigerator (100) according to one embodiment of the present disclosure. The refrigerator (100) of the present embodiment cools the air within a storage compartment using a Peltier element.

[0060] Referring to FIG. 1, a refrigerator (100) may include a main body (1) having one or more storage compartments (S) formed therein, a cooling unit (2) for cooling one or more storage compartments (S), and a heat dissipation unit (3) for dissipating heat generated in the cooling unit (2) to the outside of the main body (1). The cooling unit (2) includes one or more Peltier elements (thermoelectric elements) (FIG. 2: 21). A control unit (9) controls the operations of the cooling unit (2) and the heat dissipation unit (3).

[0061] The main body (1) has one or more storage chambers (S). The one or more storage chambers (S) are provided inside the main body (1). Although not shown in the drawing, the main body (1) may have an inner case and an outer case arranged on the outside of the inner case. An insulating material may be arranged between the inner case and the outer case. The inner case may include at least one of a case, a plate, a panel, or a liner forming one or more storage chambers (S). The outer case may form the exterior of the main body (1) and may be coupled to the outside of the inner case so that an insulating material is arranged between the inner case and the outer case.

[0062] The shape of the main body (1) may be, for example, a rectangular parallelepiped, but is not limited thereto. Although not illustrated in the drawing, a door for opening and closing a storage compartment (S) may be provided on the main body (1). The side of the main body (1) on which the door is provided is referred to as the front side of the refrigerator (100), and the opposite side is referred to as the back side. Hereinafter, the direction in which the front and back sides are arranged is referred to as the front-back direction, the horizontal direction perpendicular to the front-back direction is referred to as the left-right direction, and the direction perpendicular to the front-back direction and the left-right direction is referred to as the up-down direction. The up-down direction is a vertical direction.

[0063] The number of storage rooms (S) is not particularly limited. There may be one or two or more storage rooms (S). Two or more storage rooms (S) may be arranged in the vertical direction and / or left-right direction inside the main body (1). In the present embodiment, the main body (1) has four storage rooms (S) partitioned in the vertical direction. Hereinafter, among the four storage rooms (S), the one located at the topmost position is referred to as an upper storage room (SU), the one located at the bottommost position is referred to as a lower storage room (SL), and the one between the upper storage room (SU) and the lower storage room (SL) is referred to as a middle storage room (SM).

[0064] A cooling unit (2) is provided within the main body (1). Referring to FIGS. 1 to 3, the cooling unit (2) may include one or more Peltier elements (21) and one or more cooling heat sinks (22) arranged between the Peltier elements (21) and the storage compartment (S) to expand the heat exchange area between the Peltier elements (21) and the storage compartment (S). The cooling unit (2) may include a plurality of Peltier elements (21). A plurality of cooling heat sinks (22) may be arranged to correspond to each of the plurality of Peltier elements (21). One cooling heat sink (22) may also be arranged to correspond to two or more Peltier elements (21). A cooling fan (23) circulates air within the refrigerator (100). In the present embodiment, the cooling unit (2) is arranged at the rear of the central storage compartment (SM), but the arrangement position of the cooling unit (2) is not limited thereto.

[0065] The Peltier element (21) is an example of a thermoelectric element that moves heat from one side (cooling side) to the opposite side (heat dissipation side) when current is supplied. Referring to FIGS. 2 and 3, the Peltier element (21) according to one embodiment may be a plate-shaped semiconductor having a rectangular shape. Since the Peltier element (21) is not visible from the outside because it is covered by a water jacket (31) described later, it is represented in a grid pattern in FIG. 2 for the convenience of explanation.

[0066] In the present embodiment, a plurality of Peltier elements (21) are arranged between the rear surface of the main body (1) of the refrigerator (100) and the storage compartment (S). Each of the plurality of Peltier elements (21) has one surface facing the front of the main body (1) of the refrigerator (100), i.e., the storage compartment (S), and the other surface facing the rear of the main body (1) of the refrigerator (100). In the present embodiment, three Peltier elements (21) are arranged side by side in the left-right direction. In a cooling operation (cooling mode described later) for cooling the inside of the storage compartment (S), the one surface and the other surface become a cooling surface (21C) and a heat dissipation surface (21R), respectively. The cooling surface (21C) absorbs heat of the air inside the storage compartment (S), and the heat dissipation surface (21R) dissipates heat transferred from the cooling surface (21C) to the outside of the storage compartment (S).

[0067] A cooling heat sink (22) is mounted on the cooling surface (21C) of the Peltier element (21) and exchanges heat with the air inside the storage chamber (S). The surface area of ​​the cooling heat sink (22) is larger than the surface area of ​​the cooling surface (21C) of the Peltier element (21). By arranging the cooling heat sink (22) with a large heat transfer area on the cooling surface (21C) of the Peltier element (21), the cooling performance when the Peltier element (21) cools the air inside the storage chamber (S) can be improved. In the present embodiment, three cooling heat sinks (22) and three Peltier elements (21) correspond one-to-one, but this is not limited thereto. For example, two or more Peltier elements (21) may correspond to one cooling heat sink (22), and two or more cooling heat sinks (22) may correspond to one Peltier element (21).

[0068] The cooling fan (23) supplies air cooled by heat exchange with the cooling heat sink (22) to the storage chamber (S). As an example, the cooling fan (23) may be positioned above the Peltier element (21) and the cooling heat sink (22). For example, the cooling fan (23) may circulate air within the main body (1) in the order of cooling section (2) - upper storage chamber (SU) - middle storage chamber (SM) - lower storage chamber (S) - cooling section (2) through a duct (not shown) installed within the main body (1). However, this is exemplary, and the arrangement position of the cooling fan (23) and the circulation path of the air within the main body (1) are not limited to the above-described path.

[0069] According to the refrigerator (100) of the present disclosure employing a thermoelectric cooling method, since a Peltier element (21) is used to cool the storage compartment (S), a refrigerant that may have a negative impact on the environment, such as Freon, is not required compared to a compressor-type refrigerator. In addition, noise generated from a compressor that compresses the refrigerant can also be reduced. In addition, by employing a plurality of Peltier elements (21), a refrigerator (100) having sufficient cooling performance can be implemented even if the capacity of the storage compartment (S) is large.

[0070] A heat dissipation unit (3) is arranged inside the main body (1). The heat dissipation unit (3) absorbs heat from the Peltier element (21) using a cooling liquid and releases the absorbed heat to the outside of the main body (1). The heat dissipation unit (3) may include a water jacket (31), a radiator (32), and a cooling liquid passage (33) for circulating the cooling liquid between them. The water jacket (31) contacts the heat dissipation surface (21R) of the Peltier element (21) and absorbs the heat dissipated from the heat dissipation surface (21R) into the cooling liquid. The radiator (32) releases the heat absorbed by the cooling liquid in the water jacket (31) to the outside of the main body (1). The radiator (32) is arranged in the main body (1) so as to be spaced apart from the cooling unit (2). A liquid having a specific heat and a high heat transfer coefficient greater than those of air may be used as the cooling liquid. For example, water, ethylene glycol, etc. may be used as the cooling liquid.

[0071] FIG. 4 is a schematic rear view of a water jacket (31) according to an embodiment of the present disclosure. FIG. 5 is a schematic side view of a water jacket (31) according to an embodiment of the present disclosure. FIG. 6 is a schematic rear view showing the structure of an internal space (IS) of a water jacket (31) according to an embodiment of the present disclosure. FIG. 7 is a cross-sectional view taken along line AA' of the water jacket (31) according to an embodiment of the present disclosure illustrated in FIG. 6. Referring to FIGS. 2 to 7, the water jacket (31) has an internal space (IS) through which a cooling liquid flows. The water jacket (31) exchanges heat with a heat dissipation surface (21R) of a Peltier element (21). The water jacket (31) is in contact with the heat dissipation surface (21R) of the Peltier element (21). The water jacket (31) covers the heat dissipation surface (21R) of the Peltier element (21). In this embodiment, three water jackets (31) cover the heat dissipation surface (21R) of each of three Peltier elements (21).

[0072] The water jacket (31) may be a block shape having a flat surface covering the entire heat dissipation surface of the Peltier element (21). Screw holes (Fig. 4: 31S) may be provided on the edge of the water jacket (31). With the Peltier element (21) positioned between the cooling heat sink (22) and the water jacket (31), the water jacket (31) may be coupled to the cooling heat sink (22) by fastening screws (not shown) to the cooling heat sink (22) through the screw holes (31S). The Peltier element (21) is fixed between the cooling heat sink (22) and the water jacket (31).

[0073] Referring to Fig. 5, a spacer (211) may be interposed between the cooling heat sink (22) and the water jacket (31). The spacer (211) may surround the edge of the Peltier element (21). The spacer (211) alleviates stress applied to the Peltier element (21) when the water jacket (31) is fixed to the cooling heat sink (22) by screw fastening while the Peltier element (21) is inserted therebetween.

[0074] As an example, the water jacket (31) may have a structure in which two blocks (a water cooling block (31a) and a cover block (31b)) are combined. An internal space (IS) in which a cooling liquid flows is formed between the water cooling block (31a) and the cover block (31b). However, the structure of the water jacket (31) described above is exemplary, and the structure of the water jacket (31) is not limited to the structure described above. For example, the water jacket (31) may have a single block structure, or may have a structure in which three or more blocks are combined.

[0075] The water cooling block (31a) is in contact with the heat dissipation surface (21R) of the Peltier element (21). The internal space (IS) faces the heat dissipation surface (21R) of the Peltier element (21) with the water cooling block (31a) interposed therebetween. The internal space (IS) may be provided to face the entire heat dissipation surface (21R) of the Peltier element (21). The heat of the heat dissipation surface (21R) is absorbed by the cooling liquid of the internal space (IS) through the water cooling block (31a). The internal space (IS) may have a shape capable of uniformly cooling the entire heat dissipation surface (21R). To this end, the internal space (IS) may be formed in a shape (for example, a rectangular shape) that matches the shape (for example, a rectangular shape) of the heat dissipation surface (21R), and is configured to uniformly cool the entire heat dissipation surface (21R).

[0076] For effective heat exchange with the heat dissipation surface (21R) of the Peltier element (21), the water cooling block (31a) may be a flat plate that covers the entire heat dissipation surface (21R) of the Peltier element (21). The water cooling block (31a) may be formed of a material with high thermal conductivity. For example, the water cooling block (31a) may be formed of copper, aluminum, high thermal conductivity resin, etc.

[0077] The outer surface of the water cooling block (31a) facing the heat dissipation surface (21R) of the Peltier element (21) can be flat to match the surface shape of the heat dissipation surface (21R), whereby the water cooling block (31a) can be in close contact with the heat dissipation surface (21R) of the Peltier element (21). A heat transfer structure (F) can be provided on the inner surface (31c) of the water cooling block (31a). The heat transfer structure (FIGS. 6 and 7: F) can include, for example, a plurality of fins (31f). The plurality of fins (31f) can protrude from the inner surface (31c) of the water cooling block (31a) toward the internal space (IS). Thereby, a water jacket (31) in which the heat transfer structure (F) is provided in the internal space (IS) can be implemented. The surface area of ​​the inner surface of the water jacket (31) is enlarged by the heat transfer structure (F). By this, the heat exchange area between the water jacket (31), for example, the water cooling block (31a), and the cooling liquid in the internal space (IS) is expanded, enabling effective heat exchange between the water jacket (31), for example, the water cooling block (31a), and the cooling liquid.

[0078] The cover block (31b) is coupled to the water cooling block (31a) on the opposite side of the Peltier element (21). The cover block (31b) may be formed of a material (e.g., resin) having a lower thermal conductivity than the water cooling block (31a). The cover block (31b) is provided with an inlet (31d) for introducing a cooling liquid into the internal space (IS) and an outlet (31e) for discharging the cooling liquid from the internal space (IS). In one embodiment, the outlet (31e) may be positioned above the inlet (31d). Since the outlet (31e) is positioned above the inlet (31d), air that has entered the internal space (IS) of the water jacket (31) can be easily discharged through the outlet (31e).

[0079] As an example, the cover block (31b) may cover the protruding ends of a plurality of fins (31f) protruding from the inner surface (31c) of the water-cooling block (31a). As a result, the internal space (IS) is divided into a plurality of flow paths by the plurality of fins (31f). The coolant introduced into the internal space (IS) through the inlet (31d) flows along the plurality of flow paths, absorbs heat from the water-cooling block (31a), and is discharged from the internal space (IS) through the discharge port (31e). The plurality of flow paths may be connected to each other.

[0080] A flexible sealing member (31g) may be placed between the water cooling block (31a) and the cover block (31b). The sealing member (31g) may be pressed against the protruding ends of the plurality of fins (31f) to eliminate the gap between the protruding ends of the plurality of fins (31f) and the cover block (31b). Accordingly, all of the cooling liquid may flow along the plurality of passages between the plurality of fins (31f), thereby enabling effective heat exchange between the water cooling block (31a) and the cooling liquid. In the present embodiment, the plurality of passages are formed so that the cooling liquid introduced into the internal space (IS) flows from the center of the internal space (IS) forming a rectangular shape toward the edge. To this end, the plurality of fins (31f) may extend leftward and rightward and be arranged upward and downward.

[0081] Since the heat dissipation surface (21R) of the Peltier element (21) is cooled with a cooling liquid having a high heat transfer coefficient, the thermal resistance of the heat dissipation side of the Peltier element (21) is reduced compared to a refrigerator that cools the heat dissipation surface (21R) with air. Accordingly, the cooling performance by the Peltier element (21) can be improved. Since the heat transfer structure (F) is installed in the internal space (IS) of the water jacket (31), the heat dissipation surface (21R) of the Peltier element (21) can be efficiently cooled, and as a result, the cooling performance by the Peltier element (21) can be improved.

[0082] The radiator (32) radiates heat absorbed by the coolant in the water jacket (31) to the outside of the main body (1). Referring to FIGS. 1 to 3, the radiator (32) may be provided with a radiator pipe (not shown) through which the coolant flows, and a heat dissipation fan (321) that dissipates heat of the coolant in the radiator pipe. The radiator (32) has an inlet (32a) through which the coolant flows from the water jacket (31), and an outlet (32b) through which the coolant is discharged to the water jacket (31) after heat dissipation. A radiator pipe is arranged between the inlet (32a) and the outlet (32b). The coolant that flows into the radiator (32) through the inlet (32a) flows along the radiator pipe and is cooled by heat exchange with the air supplied by the heat dissipation fan (321), and is discharged from the radiator (32) through the outlet (32b).

[0083] As an example, the radiator (32) may be arranged below the cooling unit (2). In this example, the radiator (32) is installed at the rear of the lower storage compartment (SL) (here, the lowest part of the refrigerator (100)). As an example, the radiator (32) may have a structure in which the upstream side and the downstream side coolant do not mix with each other during the period from when the coolant is introduced into the radiator (32) until it is discharged from the radiator (32) after heat dissipation. That is, the radiator (32) may have a structure in which the coolant flows in one direction along the radiator pipe. According to this, the power consumption of the pump (P) that circulates the coolant can be reduced. As an example, the radiator (32) may have a structure in which the upstream side coolant and the downstream side coolant mix with each other during the process from when the coolant is introduced into the radiator (32) to when it is discharged from the radiator (32) after heat dissipation.

[0084] As an example, the heat dissipation fan (321) can supply air sucked from the front side of the main body (1) through the bottom of the main body (1) to the radiator (32) and discharge it to the rear side of the main body (1). With this configuration, the ventilation path can be shortened, pressure loss can be reduced, and the energy efficiency of the heat dissipation fan (321) can be increased. In this example, the radiator (32) is provided with two heat dissipation fans (321), but the number of heat dissipation fans (321) is not limited to two.

[0085] In the case of a general refrigerator (100) installed on a floor, etc., the storage compartment (S) at the top or middle part of the refrigerator (100) in the vertical direction, for example, the upper storage compartment (SU) or the middle storage compartment (SM), is a place that is easy for the user to access, so it is advantageous in terms of user convenience to make the capacity of the upper storage compartment (SU) or the middle storage compartment (SM) as large as possible. According to the refrigerator (100) of the present disclosure, since the radiator (32), which is large in volume and requires a relatively large installation space, is installed at the bottom of the refrigerator (100), the space of the upper storage compartment (SU) or the middle storage compartment (SM) can be secured as large as possible, thereby improving the usability of the refrigerator (100). In addition, since the arrangement of the radiator (32) is similar to that of a general compressor-type refrigerator (100), it is possible to share parts with a general compressor-type refrigerator (100), thereby reducing manufacturing costs.

[0086] Condensation may generate condensate in the cooling unit (2). Frost attached to the cooling unit (2) may melt. Condensation and melted frost may fall down from the cooling unit (2) by gravity. According to the refrigerator (100) of the present disclosure, the cooling unit (2) is arranged above the radiator (32). Condensation and melted frost fall to the radiator (32) by gravity and may be evaporated by the heat of the radiator (32). As a result, water falling from the cooling unit (2) can be treated without using another treatment device.

[0087] The coolant passage (33) forms a path for circulating coolant between the water jacket (31) and the radiator (32). The coolant passage (33) can be formed by connecting the water jacket (31) and the radiator (32) by a coolant pipe (T) installed inside the main body (1). In one embodiment, the coolant pipe (T) can extend substantially parallel to the back surface of the main body (1) to connect the water jacket (31) and the radiator (32). Accordingly, the coolant pipe (T) can be arranged so as not to interfere with other components, thereby securing the internal volume of the refrigerator (100).

[0088] Since the coolant that has absorbed heat from the Peltier element (21) is transported to the radiator (32) along the coolant pipe (T), the radiator (32) can be placed at a location away from the Peltier element (21). Accordingly, compared to a conventional refrigerator in which the radiator (32) and the Peltier element (21) form a single assembly, the degree of freedom in the arrangement of the Peltier element (21) and the radiator (32) within the main body (1) can be improved.

[0089] The pump (P) circulates the coolant along the coolant path (33). The pump (P) may be a constant-speed pump, or may be a pump having a flow control function that variably controls the flow rate of the coolant. In the present embodiment, the pump (P) may be set to operate to control the flow rate of the coolant so that the coolant flows in a laminar flow state along the internal space (IS) of the water jacket (31) or to satisfy such a condition. Specifically, the Reynolds number of the flow of the coolant in the internal space (IS) of the water jacket (31) may be 2300 or less. The Reynolds number is defined by Equation (1).

[0090] Re=ρVD h / μ --- (1)

[0091] Re: Reynolds number

[0092] V: Coolant velocity [m / s]

[0093] D h =4hg / {2(h+g)}[m]

[0094] h: Height of the inner fin (31f) of the water jacket (31) (= Euro height) [m]

[0095] g: Space between the inner fins (31f) of the water jacket (31) (= flow width) [m]

[0096] μ: viscosity coefficient of coolant [Pa·s]

[0097] The coolant flows in a laminar flow state in the internal space (IS) of the water jacket (31), and since the heat transfer coefficient of the coolant in the laminar flow state is constant regardless of the flow rate of the coolant, the influence on the heat transfer performance is small. Since the power consumption of the pump (P) is greatly reduced when the flow rate is reduced, the energy consumption efficiency of the refrigerator (100) can be improved by maintaining the flow rate of the coolant in a laminar flow state.

[0098] As an example, the coolant flow path (33) may connect multiple water jackets (31) in parallel to one radiator (32). In this embodiment, in the coolant flow path (33), the coolant heated in three water jackets (31) merges into one and flows along the coolant pipe (T) to be introduced to the radiator (32). The coolant cooled in the radiator (32) flows along the coolant pipe (T) and then branches into three and is introduced to each of the three water jackets (31). Since the coolant flows by branching into each of the multiple water jackets (31), the flow rate of the coolant flowing in each water jacket (31) may be reduced, thereby reducing the power of the pump (P) for circulating the coolant. However, the structure of the coolant flow path (33) is not limited thereto, and the coolant flow path (33) may also connect three water jackets (31) in series.

[0099] Since a plurality of water jackets (31) are connected to a single radiator (32), heat emitted from each heat dissipation surface (21R) of a plurality of Peltier elements (21) can be collected in a single radiator (32) through a cooling liquid path (33) and dissipated to the outside of the main body (1). Therefore, compared to a case where a radiator (32) or a heat dissipation fan (321) is installed for each of a plurality of Peltier elements (21), the number of parts can be reduced, and it is easy to secure the internal volume of the refrigerator (100).

[0100] Referring to FIG. 1, the control unit (9) may include a memory (92) that stores or memorizes a program and / or data for controlling the refrigerator (100), and a processor (91) that outputs a control signal for controlling the refrigerator (100) according to the program and / or data stored in the memory. The memory (92) may include at least one of a volatile memory or a non-volatile memory, or a combination thereof. The processor (91) controls the overall operation of the refrigerator (100). The processor (91) may execute a program stored in the memory (92) to control components of the refrigerator (100), for example, the cooling unit (2) and the heat dissipation unit (3). The processor (91) may include a central processing unit (CPU), a graphics processor (GPU), etc. Although not illustrated in the drawing, the control unit (9) may include circuit elements that connect the components of the refrigerator (100) and the processor (91), for example, an A / D converter, etc.

[0101] The control unit (9) can control the Peltier element (21). The control unit (9) can control the current flowing to the Peltier element (21). The control unit (9) can control the Peltier element (21) to execute a cooling mode. In a normal cooling mode, the control unit (9) can cause a current to flow to the Peltier element (21) so that one side of the Peltier element (21) facing the storage chamber (S) becomes a cooling side (21C) and the other side becomes a heat dissipation side (21R). The control unit (9) can individually control the current flowing to the plurality of Peltier elements (21). The control unit (9) can individually control the current flowing to the plurality of Peltier elements (21) so that the temperatures of the cooling sides (21C) of each of the plurality of Peltier elements (21) are different from each other. The control unit (9) can also control the voltage applied to the Peltier element (21).

[0102] Since the current of multiple Peltier elements (21) can be individually controlled, the temperature within the storage chamber (S) can be set more finely. For example, the temperature distribution within the storage chamber (S) can be set according to the arrangement of the coolant within the storage chamber (S).

[0103] The control unit (9) can control a plurality of Peltier elements (21) to execute a defrost mode. The defrost mode can be executed by stopping the supply of current to the Peltier elements (21) at a predetermined timing during execution of the cooling mode or by flowing a current in the opposite direction to the current flowing to the Peltier elements (21) during the cooling mode to the Peltier elements (21). The defrost mode can be executed at regular intervals, for example, after the start of the cooling mode.

[0104] The control unit (9) can control the Peltier elements (21) to execute a partial defrost mode. The partial defrost mode can be executed by stopping the supply of current to some of the Peltier elements (21) among the plurality of Peltier elements (21). For example, the partial defrost mode can be executed by synchronizing a predetermined timing for executing the defrost mode for some of the Peltier elements (21) with other Peltier elements (21) among the plurality of Peltier elements (21). In other words, in the partial defrost mode, the control unit (9) can control some of the plurality of Peltier elements (21) to operate in the defrost mode and the rest to operate in the cooling mode.

[0105] When the defrost mode is executed, the current supply to the Peltier element (21) is stopped or a reverse current flows to the Peltier element (21). Then, the temperature of the cooling heat sink (22) rises, and the frost attached to the cooling heat sink (22) can be melted and removed. If the defrost mode is controlled to be executed for all of the plurality of Peltier elements (21), the temperature inside the storage chamber (S) may rise excessively. According to the partial defrost mode, since some of the plurality of Peltier elements (21) are operated in the defrost mode, the temperature inside the storage chamber (S) can be prevented from rising excessively.

[0106] In the above-described embodiment, a plurality of Peltier elements (21), for example, three Peltier elements (21), are arranged in a row in the left-right direction. However, the arrangement of the plurality of Peltier elements (21) is not limited thereto. Some of the plurality of Peltier elements (21) may be arranged to be spaced apart from other adjacent Peltier elements (21). In addition, the plurality of Peltier elements (21) may be arranged in the left-right direction and / or the up-down direction. The spacing between the plurality of Peltier elements (21) may be uniform or may not be uniform.

[0107] Fig. 8 is a schematic diagram of a refrigerator (100) according to one embodiment of the present disclosure. Referring to Fig. 8, three Peltier elements (21) are arranged to be spaced apart from each other in the vertical direction (vertical direction). When a plurality of storage compartments (S) are arranged to be divided in the vertical direction, a Peltier element (21) can be arranged in each storage compartment (S). Therefore, it is easy to cool each storage compartment (S) evenly. In addition, various descriptions of cooling modes are possible, such as individually controlling the temperature of each storage compartment (S). In addition, since a radiator (32) is arranged below a plurality of Peltier elements (21) arranged in the vertical direction, condensation water generated on the cooling surfaces (21C) of the plurality of Peltier elements (21) can fall on the common radiator (32) and evaporate.

[0108] The cooling unit (2) does not necessarily have to be equipped with multiple Peltier elements (21). The cooling unit (2) may also be equipped with one Peltier element (21). In this case, the cooling performance can be improved by cooling the heat dissipation surface (21R) of the Peltier element (21) with a cooling liquid. In addition, since the cooling unit (2) and the radiator (32) can be arranged in a spaced-apart state in the cooling liquid path (33), the degree of freedom in the arrangement of each component within the main body (1) of the refrigerator (100) can be increased.

[0109] The water jacket (31) does not necessarily have to be installed on each Peltier element (21). That is, the water jacket (31) and the Peltier element (21) do not have to correspond one-to-one. One water jacket (31) may correspond to two or more Peltier elements (21). For example, one water jacket (31) may cover the heat dissipation surfaces (21R) of two or more Peltier elements (21) arranged in series. The water jacket (31) does not necessarily have to cover the entire heat dissipation surface (21R) of the Peltier element (21), but may cover at least a part of the heat dissipation surface (21R). The heat transfer structure (F) provided in the internal space (IS) of the water jacket (31) is not limited to a plurality of fins (31f), and various structures that can increase the heat transfer area between the water jacket (31) and the cooling liquid are possible.

[0110] A plurality of radiators (32) may be installed depending on the size of the refrigerator (100), etc. In this case, by corresponding two or more Peltier elements (21) to one radiator (32), it is possible to reduce the number of parts and secure the internal volume of the refrigerator (100) compared to the case where the Peltier elements (21) and the radiators (32) are corresponding one to one. In addition, the radiator (32) may be arranged at the upper part of the refrigerator (100). For example, the thermoelectric cooling method according to the present disclosure may be applied to a refrigerant-cooled refrigerator having a structure in which the radiator is not arranged at the bottom. In this case, if a means for transporting condensation water to the heat dissipation unit (3), i.e., the radiator (32), is secured separately in the refrigerator, this configuration in which the radiator (32) is arranged at the upper part of the refrigerator may be applied. In this way, according to the present disclosure, the position of the radiator (32) can be determined according to the shape of the refrigerator. However, the position of the radiator (32) is not limited to the lower or upper part of the main body (1), and the radiator (32) may be placed in the middle part of the main body (1).

[0111] According to one aspect of the present disclosure, a refrigerator comprises a main body, a cooling unit, and a heat dissipation unit. A storage compartment is provided in the main body. The cooling unit cools air within the storage compartment. The cooling unit comprises a Peltier element that, when current is supplied, transfers heat from a cooling surface facing the storage compartment to a heat dissipation surface. The heat dissipation unit comprises a water jacket, a radiator, and a coolant passage. The water jacket contacts the heat dissipation surface of the Peltier element and absorbs heat dissipated from the heat dissipation surface into a coolant. The radiator is disposed in the main body so as to be spaced apart from the cooling unit. The radiator dissipates heat absorbed by the coolant in the water jacket to the outside of the main body. The coolant passage circulates the coolant between the water jacket and the radiator.

[0112] According to this configuration, since the heat dissipation surface of the Peltier element is cooled by a coolant having a high heat transfer coefficient, the thermal resistance on the heat dissipation side of the Peltier element can be reduced compared to a refrigerator that cools the heat dissipation surface with air, thereby improving the cooling performance of the Peltier element. In addition, since the coolant transfers the heat dissipated from the heat dissipation surface to the radiator along the coolant flow path, the radiator can be installed away from the Peltier element. Therefore, the degree of freedom in the arrangement of the Peltier element and the radiator within the main body can be increased. Therefore, for example, an arrangement structure in which the cooling unit employed in a typical compressor-type refrigerator is arranged in the middle part of the main body and the radiator is arranged in the lowest part of the main body can be adopted, enabling the commonization of parts with typical refrigerators and the accompanying cost reduction. In addition, since the Peltier element and radiator do not need to be arranged as a single assembly, the degree of freedom in the arrangement of other parts can also be increased.

[0113] As an example, the water jacket may have an internal space through which the coolant flows. A heat transfer structure may be provided in the internal space to expand the heat exchange area between the water jacket and the coolant. With such a configuration, the heat transfer efficiency from the heat dissipation surface of the Peltier element to the coolant can be increased, thereby efficiently cooling the heat dissipation surface, and consequently, the cooling performance of the Peltier element can be enhanced.

[0114] As an example, the heat transfer structure may include a plurality of fins protruding from the inner surface of the water jacket toward the inner space.

[0115] As an example, the water jacket may include a water cooling block that contacts the heat dissipation surface of the Peltier element, and a cover block that is coupled to the water cooling block and forms the internal space therebetween. The plurality of fins may protrude from the water cooling block into the internal space.

[0116] As an example, a sealing member may be interposed between the water cooling block and the cover block. The sealing member may be pressed against the protruding ends of the plurality of fins.

[0117] With this configuration, the internal space of the water jacket is divided into multiple channels by the multiple fins. Since the sealing member is pressed against the protruding ends of the multiple fins, all coolant flows along the multiple channels between the multiple fins. Consequently, effective heat exchange between the water jacket and the coolant is possible.

[0118] As an example, the water jacket may include an inlet for introducing coolant into the internal space and an outlet for discharging coolant from the internal space. The outlet may be positioned above the inlet. This allows air entering the internal space of the water jacket to be easily discharged through the outlet.

[0119] In one embodiment, the refrigerator may include a cooling heat sink mounted on the cooling surface of the Peltier element to exchange heat with air within the storage compartment. The water jacket may be fixed to the cooling heat sink with the Peltier element interposed therebetween. A spacer surrounding the Peltier element may be interposed between the water jacket and the cooling heat sink. This reduces stress applied to the Peltier element during the process of fixing the Peltier element and the water jacket to the cooling heat sink.

[0120] In one embodiment, the coolant may flow laminarly within the water jacket. This reduces the power consumption of the pump circulating the coolant without degrading the heat transfer performance from the water jacket to the coolant, thereby improving the energy efficiency of the refrigerator.

[0121] As an example, the cooling unit may be positioned above the radiator. Accordingly, condensation generated in the cooling unit may fall to the radiator by gravity, and the condensation may be evaporated by the heat of the radiator.

[0122] As an example, the cooling unit may include a plurality of Peltier elements. This allows for a larger refrigerator capacity while maintaining cooling performance.

[0123] As an example, the heat dissipation unit may include a plurality of water jackets corresponding to each of the plurality of Peltier elements.

[0124] As an example, the coolant path may connect the plurality of water jackets in parallel to the radiator.

[0125] Since the coolant that absorbs heat from each heat dissipating surface of multiple Peltier elements can be transported to a common radiator (e.g., one radiator) through a coolant flow path and the heat of the coolant can be dissipated outside the main body, it is possible to reduce the number of parts and secure the internal volume of the refrigerator compared to the case where a radiator or cooling fan is installed for each multiple Peltier element.

[0126] In one embodiment, the plurality of Peltier elements may be arranged vertically apart from each other. With this configuration, in a refrigerator with a large storage compartment, it is easy to uniformly cool the entire storage compartment. Furthermore, by installing a radiator below the plurality of Peltier elements arranged vertically, condensation water generated on the cooling surfaces of the plurality of Peltier elements can be collected and evaporated by the common radiator.

[0127] As an example, the refrigerator may include a control unit that individually controls the current flowing through the plurality of Peltier elements. This allows the temperature distribution within the storage compartment to be freely set, for example, according to the arrangement of the coolant within the storage compartment.

[0128] As one embodiment, the control unit can control the plurality of Peltier elements so that some of the plurality of Peltier elements operate in a freezing mode and the remaining Peltier elements operate in a cooling mode.

[0129] During the cooling operation, condensation water formed by condensation in the cooling unit may freeze and attach to the cooling unit as frost. To remove the frost, the control unit may operate some of the plurality of Peltier elements in a defrost mode to increase the temperature of the cooling surface on which frost has accumulated. Since some of the plurality of Peltier elements are operated in the defrost mode, a rapid increase in the temperature inside the storage room can be avoided. The technical effects to be achieved in this document are not limited to the technical effects mentioned above, and other technical effects not mentioned will be clearly understood by a person skilled in the art to which the present disclosure pertains from the description of this document.

[0130] As described above, although the refrigerator of the present disclosure has been described with limited embodiments and drawings, the present disclosure is not limited to the above embodiments, and various modifications are possible without departing from the spirit thereof.

Claims

1. A main body (1) with a storage room (S) provided inside; A cooling unit (2) having a Peltier element (21) that moves heat from a cooling surface (21C) facing the storage room to a heat dissipation surface (21R) when current is supplied, and cooling the air within the storage room; and A refrigerator comprising a heat dissipation unit (3) having a water jacket (31) that contacts the heat dissipation surface of the Peltier element and absorbs heat dissipated from the heat dissipation surface into a cooling liquid, a radiator (32) that dissipates heat absorbed by the cooling liquid in the water jacket to the outside of the main body (1) and is disposed in the main body (1) so as to be spaced apart from the cooling unit (2), and a cooling liquid passage (33) that circulates the cooling liquid between the water jacket and the radiator.

2. In paragraph 1, The above water jacket has an internal space (IS) through which the cooling liquid flows, A refrigerator having a heat transfer structure (F) provided in the internal space to expand the heat exchange area between the water jacket and the coolant.

3. In paragraph 2, A refrigerator in which the above heat transfer structure includes a plurality of fins (31f) protruding from the inner surface of the water jacket toward the inner space.

4. In paragraph 3, The above water jacket includes a water cooling block (31a) that contacts the heat dissipation surface of the Peltier element, and a cover block (31b) that is combined with the water cooling block to form the internal space therebetween. A refrigerator in which the plurality of fins protrude from the water cooling block into the internal space.

5. In paragraph 4, A sealing member is interposed between the water cooling block and the cover block, A refrigerator in which the sealing member is pressed against the protruding ends of the plurality of pins.

6. In any one of paragraphs 2 to 5, The above water jacket has an inlet (31d) for introducing a cooling liquid into the internal space and an outlet (31e) for discharging the cooling liquid from the internal space. A refrigerator wherein the above outlet is positioned above the above inlet.

7. In any one of paragraphs 1 to 6, It includes a cooling heat sink (22) mounted on the cooling surface (21C) of the Peltier element (21) and exchanging heat with the air inside the storage chamber (S); The above water jacket is fixed to the cooling heat sink with the Peltier element in between, A refrigerator in which a spacer (211) surrounding the Peltier element is interposed between the water jacket and the cooling heat sink.

8. In any one of paragraphs 1 to 7, A refrigerator in which the coolant flows in a laminar flow state inside the water jacket.

9. In any one of paragraphs 1 to 8, A refrigerator in which the cooling unit is positioned above the radiator.

10. In any one of paragraphs 1 to 9, A refrigerator wherein the above cooling unit comprises a plurality of the above Peltier elements.

11. In paragraph 10, A refrigerator in which the heat dissipation unit has a plurality of water jackets corresponding to each of the plurality of Peltier elements.

12. In paragraph 11, A refrigerator in which the above-mentioned coolant flow path connects the plurality of water jackets in parallel to the above-mentioned radiator.

13. In any one of paragraphs 10 to 12, A refrigerator in which the above plurality of Peltier elements are arranged spaced apart from each other in the vertical direction.

14. In any one of paragraphs 10 to 13, A refrigerator including a control unit (9) that individually controls the current flowing through the plurality of Peltier elements.

15. In paragraph 14, A refrigerator in which the control unit controls the plurality of Peltier elements so that some of the plurality of Peltier elements operate in a defrosting mode and the remaining Peltier elements operate in a cooling mode.

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