KR101097116B1 - Kimchi refrigerator having a heater of surface type - Google Patents

Abstract

The present invention relates to a kimchi refrigerator having a surface heater.

Kimchi refrigerator of the present invention is an inner phase to accommodate the storage; An evaporator wound around one side of the inner phase to cool the inside of the inner phase; And a planar heater wound around the other side of the inner box and dissipating heat into the inner box, wherein the planar heater generates heat when power is applied to both ends of the strip, and a plurality of strips are spaced apart. Both side ends of the strips arranged in parallel and adjacent to each other include strip-like planar heating elements that are interconnected, and an insulating layer coated in a plate shape on the outer circumference of the strip-shaped planar heating elements.

Kimchi refrigerator, aging, heater, surface heater, metal thin film strip

Description

Kimchi refrigerator having a heater of surface type

The present invention relates to a kimchi refrigerator, and more particularly to a kimchi refrigerator having a heater used for the ripening of kimchi.

In general, the Kimchi refrigerator is configured by forming a refrigeration cycle using the compressor, the condenser, the expansion device and the evaporator as main components, and a heater provided separately from the evaporator is arranged to surround the outer circumferential surface of the storage space.

The kimchi refrigerator stores the stored matter stored in the storage space through the heat transfer between the evaporator and the heater and the air inside the storage space in a aging or low temperature state as necessary.

Hereinafter, a conventional kimchi refrigerator disclosed in Korean Patent Application No. 10-1999-0067475 will be described with reference to FIG. 1.

Referring to Figure 1, the conventional kimchi refrigerator is provided with two storage compartments (110a, 110b), the lower body and the refrigerator unit chamber 120 is formed at the bottom; Doors 140a and 140b for selectively rotating and opening the storage chambers 110a and 110b; An evaporator (150a, 150b) installed at the sides of the storage chambers (110a, 110b) and dissipating cold air in the storage chambers (110a, 110b); Heaters (160a, 160b) disposed on the sides of the storage chambers (110a, 110b) and dissipating heat to the storage chambers (110a, 110b); And a controller 170 for selectively driving the evaporators 150a and 150b or the heaters 160a and 160b. Here, the heaters 160a and 160b are wound around the outside of the storage compartments 110a and 110b in the form of pipes.

In particular, the heaters 160a and 160b forcibly raise the temperature in the storage chambers 110a and 110b by using a heat generated by applying a constant voltage to ferment and mature kimchi.

However, in the Kimchi refrigerator having the structure as described above, heaters 160a and 160b for fermenting and ripening kimchi are located at the sides of the storage compartments 110a and 110b and surround the outer sides of the storage compartments 110a and 110b in the form of pipes. The temperature between the contacted and non-contacted surfaces of is not uniform. Therefore, heat transfer was not uniform and uniform aging of the stock in the storage chamber was difficult due to temperature deviation. In addition, the pipe-type heater is not excellent in the efficiency of the heater because the contact area is not large in the storage chamber to be heated.

Accordingly, an object of the present invention is to provide a kimchi refrigerator that maximizes the heating efficiency of the heater by increasing the contact area by making the shape of the heater surrounding the storage chamber of the kimchi refrigerator into a plane heater.

In addition, another object of the present invention is to provide a kimchi refrigerator that employs a planar heating element of a thin metal film to apply a slim planar heater to increase the heat transfer efficiency to maximize the power / heat conversion efficiency.

Still another object of the present invention is to provide a kimchi refrigerator, which is simple in structure and easy to manufacture, by applying a surface heater that is easy to adopt regardless of the size and shape of the storage compartment of the kimchi refrigerator.

It is still another object of the present invention to provide a kimchi refrigerator capable of rapid temperature control according to the ripening of the kimchi and the change of the storage mode since the planar heater adopting a planar heating element of a metal thin film having a fast temperature response and low heat density is provided. .

Kimchi refrigerator according to an aspect of the present invention for achieving the above object in the kimchi refrigerator having a kimchi storage for storing and ripening kimchi, the inner wound receiving the storage; An evaporator wound around an upper side of the inner phase to cool the inside of the inner phase; And a planar heater wound around the lower side of the inner box and dissipating heat into the inner box, wherein the planar heater generates heat when power is applied to both ends of the strip, and a plurality of strips are spaced apart. Both side ends of the strips arranged in parallel and adjacent to each other include strip-like planar heating elements that are interconnected, and an insulating layer coated in a plate shape on the outer circumference of the strip-shaped planar heating elements.

Kimchi refrigerator according to another aspect of the present invention is a kimchi refrigerator having a kimchi storage for storing and ripening kimchi, the inner phase to accommodate the storage; An evaporator wound around an upper side of the inner phase to cool the inside of the inner phase; And a planar heater wound around the lower periphery of the inner phase and dissipating heat into the inner phase, wherein the planar heater has a planar heating element in which a plurality of metal sheet strips having a high temperature response and a low thermal density are connected in series. And an insulating layer produced by laminating an insulating film in a plate shape on an outer surface of the planar heating element.

The strip type planar heating element is preferably made of amorphous strip or FeCrAl, and particularly preferably the amorphous strip is made of Fe-based material.

The planar heater described above has a plurality of strips arranged in parallel at intervals inside the insulating layer, and is connected to one end of the heater and further includes a series connection means for serially connecting adjacent strips at one end of the plurality of strips. Include.

The strip-shaped planar heating element is shaped into a spiral shape.

The insulating layer is preferably made of synthetic resin or silicon.

And when the end of each adjacent strip is connected in series using a current blocking means which is operated in a predetermined temperature range.

Here, it is preferable that the amorphous strip is set to a thickness of 10 to 50 μm, and the heater is made to a thickness of 0.2 to 1 mm.

Therefore, the present invention can maximize the heating efficiency of the heater by increasing the contact area by manufacturing the shape of the heater surrounding the storage compartment of the Kimchi refrigerator with a planar heater.

In addition, in the present invention, by adopting a planar heating element of a metal thin film, a slim planar heater may be applied to increase heat transfer efficiency, thereby maximizing power / heat conversion efficiency.

In addition, in the present invention, by applying a surface heater that is easy to adopt regardless of the size and shape of the storage compartment of the kimchi refrigerator, the structure is simple and easy to manufacture can reduce the cost.

In addition, the present invention employs a planar heater employing a planar heating element of a metal thin film having a fast temperature response and low thermal density, thereby providing the effect of rapid temperature control according to the ripening of kimchi and the change of the storage mode.

Hereinafter, with reference to the accompanying Figures 2 to 10 will be described in detail a preferred embodiment of the present invention.

2 is a cross-sectional view of the kimchi refrigerator having a planar heater according to an embodiment of the present invention.

Referring to FIG. 2, the kimchi refrigerator has a pair of inner beds 51 forming a storage space for accommodating kimchi, and a foam space filled with the foam material 53 therebetween. It has a surrounding trauma 52. The inner box 51 has an upper opening for entry and exit of the stock, and the upper opening is opened and closed by the door 54, respectively. Commercially available kimchi refrigerators, unlike the kimchi refrigerators of FIG. 2, also have relatively small ones having a single inner box, and drawer-type types in which storage items come in and out from the front. The following description with reference to FIG. 2 is generally applicable to all types of kimchi refrigerators.

On the outer surface of the inner phase 51, an evaporator 57 for cooling the inside of the inner phase 51 is wound.

The evaporator 57 is wound on the upper side of the inner box 51 in consideration of the downward flow characteristic of the cold air. The evaporator 57 receives a refrigerant through a condenser (not shown) from the compressor 55 provided in the lower portion of the inner bed 51, and returns the refrigerant having a cooling function back to the compressor 55.

As shown in FIG. 2, when two storage chambers are provided, the evaporator 57 attached to each inner box 51 is selectively or simultaneously branched and supplied with refrigerant from the condenser 55 by a branch valve device (not shown). .

In the lower region of the inner box 51, a planar heater 56 capable of heating the inside of the inner box 51 is wound. The planar heater 56 serves to ferment the stored matter, especially kimchi, by heating the storage space of the inner phase 51 as necessary.

As shown in FIG. 2, the planar heater 56 includes a planar heating element 1 and generates heat, and is coated with an outer circumference of the planar heating element 1 to protect the planar heating element 1 and to perform an insulation function. Insulation layer 3 is included. Therefore, the surface heater 56 has a large contact area with the inner box 51 due to the surface contact, so that the heating efficiency is good.

3 is a perspective view of the kimchi refrigerator inner box 51 of FIG.

Referring to FIG. 3, the inner shell 51 has a generally square cross-sectional shape, thereby having two relatively narrow mutually opposite sidewalls and two relatively wider opposite sidewalls.

The evaporator 57 is wound around the inner phase 51 in the form of a coil. The evaporator 57 has an inlet tube section 58 and an outlet tube section 59 for the inlet and outlet of the refrigerant, which extend in parallel to the bottom of the inner bed 51.

Thus, the refrigerant supplied from the bottom through the inlet pipe section 58 from the condenser (not shown) flows upward along the flow path on the coil and then flows downward again along the outlet pipe section 59 to return to the compressor 55.

On the other hand, the temperature sensor 60 for detecting a temperature is attached to the outer surface of the inner box 51 adjacent to the inflow pipe part 58 and the outflow pipe part 59. The temperature sensor 60 provides a temperature signal detected at a corresponding position to a controller (not shown), and the controller controls the operation of the compressor 55 or the surface heater 56 based on the temperature signal to control the internal temperature. Keep within the setting range.

The planar heater 56 is configured to include a planar heating element 1, and is configured to be insulated by the insulating layer 3 to the outside of the planar heating element 1, the planar heater (see Figs. 4 to 10 below) 56 will be described in more detail.

4A and 4B are a plan view and a cross-sectional view taken along line AA ′ of FIG. 4A, respectively, showing a planar heater using a strip-like planar heating element according to a first embodiment of the present invention.

4A and 4B, the planar heater 10a using the strip-shaped planar heating element 1 of the present invention has first and second electrode terminals 7a and 7b in which fuses 5a and 5b are inserted at both ends thereof. And a strip-like planar heating element 1 composed of three strips 1a, 1b and 1c having an insulating layer 3 surrounding the outer surface of the strip-shaped planar heating element 1. The fuses 5a and 5b are inserted between any one of the first and second electrode terminals 7a and 7b and the strips 1a, 1b and 1c so that a short circuit occurs when an over current flows.

The strip-like planar heating element 1 is formed in a regular pattern in which the strips 1a, 1b and 1c are zigzag continuous by slitting a metal thin film having a predetermined thickness. The outer surfaces of the strips 1a, 1b and 1c are covered with an insulating layer 3 which functions as moisture proof, heat resistant and electric insulation.

Here, the strip-shaped planar heating element 1 is laminated in a state in which a plurality of patterned strips 1a, 1b and 1c are arranged between the upper and lower insulating films, and is plate-like coated on the outer circumference of the strip-shaped planar heating element 1. It is preferable to form the insulating layer 3.

The strip-shaped planar heating element 1 of the planar heater 10a generates heat when power is applied to both ends of the strip, and the plurality of strips 1a, 1b, and 1c are arranged in parallel at intervals, and each of the adjacent strips Both ends are connected with integrated connectors 1e and 1f for interconnection in series or parallel connection.

Both ends of the plurality of strips 1a, 1b, 1c are connected in any one of a series connection, a parallel connection and a combination of series and parallel connection so as to match the resistance value required for the heater.

The strip type planar heating element 1 is formed of a single metal thin plate such as Fe, Al, Cu, iron-based (Fe-X), iron chromium-based (Fe-Cr) metal thin plate, Fe- (14-21%) Cr- (2 FeCrAl alloy sheets such as Al, Ni (77% to), Cr (19 to 21%) and Si (0.75 to 1.5%), or Ni (57% to), Cr (15 to 18%) And a nichrome hot wire made of Si (0.75 to 1.5%) and Fe (residue), and an amorphous thin plate (ribbon).

Preferred alloying materials for the FeCrAl alloy sheet are pecaloy alloys (also known as KANTHALTM wires) or Fe-20Cr-5Al-REM (rare earth metals) synthesized at a Fe-15Cr-5Al ratio (here, REM (Y, Hf, Zr) 1%) can be used.

In addition, the amorphous thin plate is made of an Fe-based or Co-based amorphous material, and is preferable because the Fe-based amorphous material is relatively inexpensive.

Fe-based amorphous material is, for example, Fe _100-uyzw R _u T _x Q _y B _z Si _w, where R is at least one of Ni and Co, T is Ti, Zr, Hf, V, Nb, Ta , At least one of Mo and W, Q is at least one of Cu, Ag, Au, Pd and Pt, u is 0-10, x is 1-5, y is 0-3, z is 5-12 And w is 8-18.

The Co-based amorphous material is, for example, Co _1-x1-x2 Fe _x1 M _x2 ) _x3 B _x4 , where M is one or more elements selected from Cr, Ni, Mo, and Mn, and x1, x2, and x3 are each In an amorphous alloy in which 0 ≦ x1 ≦ 0.10, 0 ≦ x2 ≦ 0.10, and 70 ≦ x3 ≦ 79, the composition ratio x4 of B is 11.0 ≦ x4 ≦ 13.0.

Among strip-like planar heating element (1) materials, the most preferable material is Fe-15Cr-5Al or Fe-based amorphous material, and Fe-15Cr-5Al is formed by the Al ₂ O ₃ (alumina) insulating film on the surface when the heat treatment is performed, thereby providing high temperature corrosion resistance. It has the advantage of solving the oxidation problem of the iron-based material at low cost.

In addition, among the well-known high-temperature hot wire material, the NiCROTHAL ^TM (Ni: 80) of the NiCr hot wire has a specific resistance of 1.09 Ωmm ² / m, and the KANTHAL ^TM D has a specific resistance of 1.35 Ωmm ² / m. , Fe-based amorphous thin plate (ribbon) has a specific resistance of 1.3 ~ 1.4Ωmm ² / m similar to the KANTHAL ^TM wire, it can be seen that it has a good characteristics as a hot wire material, and because it is relatively cheaper than the KANTHAL ^TM wire In the present invention, it is used as a strip-shaped planar heating element 1 material.

However, the strip-shaped planar heating element 1 material can be any metal or alloy material as long as it can be obtained inexpensively without having a large specific resistance value required for the properties of the hot wire material.

On the other hand, the amorphous thin plate (ribbon) is obtained by, for example, by spraying the molten alloy of the amorphous alloy on the cooling roll rotated at high speed by the liquid quenching method to cool at a cooling rate of 10 ⁶ K / sec to peel off 10 ~ It is made of a thickness of 50㎛, it is made of a width of 0.5mm ~ 50mm, preferably 1 ~ 2mm. In addition, the amorphous material generally has excellent material properties such as high strength, high corrosion resistance, high soft magnetic properties, and the Fe-based amorphous ribbon has an advantage that it can be purchased at about 1/2 cheaper than that of a conventional silicon heater.

As described above, since the amorphous thin plate (ribbon) is obtained with a thin plate of 10 to 50㎛, it has a surface area of 10 to 20 times or more compared with other coil type heating wires having the same cross-sectional area, so that a large area when heat is generated using the same electric power. It is suitable as low temperature heating material because it generates low temperature at. That is, since the amorphous ribbon is made of a thin plate, the heat density generated per 1 cm 2 is low, so that the amount of heat is also low. Since the surface temperature of the planar heater employing the strip-shaped planar heating element 1 does not rise to a high temperature and does not exceed a maximum of 64 degrees, temperature control using a separate controller is not required. Moreover, in the kimchi refrigerator of the present invention, since the inner temperature of the inner phase in which kimchi is stored is used to maintain about 15 degrees, the strip-shaped planar heating element 1 having an ultra-thin film thickness is the most suitable heating material as a low temperature heating material.

Therefore, the strip-shaped planar heating element 1 manufactured by processing a ribbon made of a thin plate in the present invention is an insulating layer 3 as compared with a conventional coiled heating wire, considering the excessive heat and / or high temperature heat generation to the outer periphery of the heating element. There is no need to form a thick heat resistant coating layer on the substrate.

In addition, as the material of the insulating layer 3, a synthetic resin having excellent heat resistance and electrical insulation may be used. For example, polyethylene (PE), polypropylene (PP), terephthalic acid (TPA) and mono-ethylene glycol (MEG) may be used. Various electrical insulation film materials and resins, such as PET (polyethylene terephthalate) obtained by superposing | polymerizing, polyimide, or silicone, can be used.

Synthetic resin used as the insulating layer (3) material is generally relatively inexpensive, has excellent electrical insulation, thermal stability, and water resistance, and silicone also has excellent heat resistance, tensile strength, stretch rate and wear resistance.

On the other hand, in the present invention, for example, 1m, 2m, 5m or more of a wide ribbon (100: Fig. 7a) in order to have a resistance value that is suitable when the heat is generated at a predetermined temperature with a predetermined length It is necessary to slit into a plurality of strips (1a-1c) having a width of 0.5mm or more and 50mm or less, for example 1.5mm to narrow the width and to form the entire length of the heating element. This will be described below with reference to FIGS. 7A to 7C.

Since the planar heater 10a is manufactured to have an ultra-thin film thickness, when the heater starts to mature, the temperature rise time to a set temperature (about 15 degrees) is very short, and the cooling time when the heating is completed and the low temperature mode is switched to Also very short, temperature response is very fast. Therefore, when the planar heater 10a is employed in the kimchi refrigerator, the time required for switching between the heating mode for ripening the kimchi and the low temperature mode for storing the kimchi is short, so that the temperature response is fast enough.

Other embodiments of the planar heater 10a will be described with reference to FIGS. 5 and 6.

5A and 5B are plan views showing a planar heater using a strip type planar heating element according to a second preferred embodiment of the present invention, respectively, and a sectional view taken along line B-B 'of FIG. 5A.

5A and 5B, the planar heater 10b includes a strip 1d in addition to the configuration of the first embodiment, and is configured to further have a connecting portion 1g for connection. In addition, the first and second electrode terminals 7a and 7b of the strip-shaped planar heating element 1 are composed of four strips 1a, 1b, 1c, and 1d, and are disposed on one side.

 Similarly, the planar heater 10b of FIGS. 5A and 5B generates heat when power is applied to both ends of the strip, and the plurality of strips 1a-1d are arranged in parallel at intervals and on both sides of each adjacent strip. Includes a strip-like planar heating element 1 interconnected by a series or parallel connection method, and an insulating layer 3 coated in a plate shape on the outer circumference of the strip-shaped planar heating element 1.

The planar heaters 10a and 10b according to the first embodiment of FIG. 4 and the second embodiment of FIG. 5 described above are formed using an amorphous ribbon of a thin film using the slitting pattern forming method illustrated in FIGS. 7A to 7C. Slit the 100 into a strip 1a-1d pattern having a width of 0.5mm to 50mm to have a set resistance value to narrow the width, and form the entire length of the heating element in a series-connected structure to lengthen one side or one side. And a strip-shaped planar heating element 1 formed in a pattern in which two electrode terminals are arranged on the other side, and then the outer surface of the planar heating element 1 is coated by using a pair of insulating films in the longitudinal direction. (3) was formed.

Figure 6a is a plan view showing a planar heater using a strip-like planar heating element according to a third embodiment of the present invention.

The strips 1a, 1b, 1c, and 1d are connected in series to the configuration of the second embodiment by using the serial connection device 15. In addition, the bimetals 9 are connected in series instead of the serial connection device 15 in the middle of the strips 1a-1d so that when the ambient temperature rises above the set temperature, the first and second electrode terminals 7a, It is also possible to cut off the power applied to 7b) and automatically connect the power when the temperature falls below the set temperature.

After the planar heater 10c has produced a plurality of, for example, four linear first to fourth strips 1a-1d, one end of the second and third strips 1b and 1c is bimetal. (9) to connect and form an insulating layer (3) by coating the outside of the planar heating element (1), the other end of the first and second strips (1a, 1b) and the third and fourth strips By using the conductive connectors 15a and 15b of the serial connection device 15 to connect the ends of (1c and 1d), respectively, the same planar heating element 1 structure as in the second embodiment was formed. .

The series connection device 15 has a structure in which the insulating layer 3 is formed on the outer side of the planar heating element 1 and is simply inserted into the outer side thereof, and the first and second strips 1a embedded in the insulating layer 3 are embedded. It has a structure capable of connecting the ends of 1b and the ends of the third and fourth strips 1c and 1d, respectively.

In the case where a current blocking means made of a bimetal 9 or a fuse is provided between any one of the first and second electrode terminals 7a and 7b and the heating element 1, the heating element only within a certain temperature range. If power is supplied to (1) or if over current flows, melt fuse to cut off power.

6B and 6C are diagrams illustrating in detail that the serial connection device is coupled in FIG. 6A, respectively. FIG. 6B and FIG. 6C are sectional views taken along the line C-C 'of FIG.

6B and 6C, the serial connection device 15 is electrically conductive for connecting the ends of the adjacent first and second strips 1a and 1b and the ends of the third and fourth strips 1c and 1d, respectively. The connectors 15a and 15b are integrally formed on the upper surface of the groove of the housing 15c having a rectangular groove 15d structure to one side, and each of the conductive connectors 15a and 15b is formed of the first and second strips ( 1a, 1b and four stoppers 151-154, each of which has a pointed tip in the groove direction from the inlet side, are integrally formed to correspond to the third and fourth strips 1c, 1d.

Therefore, when the heater having the insulating layer 3 formed on the outer side of the planar heating element 1 is inserted into the groove 15d of the series connection device 15 and then retracted by a slight length, the stoppers of the conductive connectors 15a and 15b are removed. 151 and 152 penetrate the insulating layer 3 and are connected to the first and second strips 1a and 1b, and the stoppers 153 and 154 are connected to the third and fourth strips 1c and 1d to make a series connection. The surface heater is prevented from retreating any more by blocking the stoppers 151-154.

The serial connection device may be connected by welding using the same material used in the above-described method. In this case, the thin film can be formed more than the series connection apparatus of the above-described method.

Hereinafter, a manufacturing process of the planar heater using the strip type planar heating element according to the present invention will be described with reference to FIGS. 7 to 10.

7A to 7C are process charts illustrating a slitting process of a strip type planar heating element according to the present invention.

First, referring to FIGS. 7A to 7C, a method of manufacturing the strip-shaped planar heating element 1 connected in series according to the second embodiment shown in FIG. 5A will be described.

Referring to FIGS. 7A to 7C, since the wide amorphous ribbon 100 has a small resistance value, for example, a strip having a width of 0.5 mm to 50 mm may have a predetermined resistance value when the heater length is small. It is necessary to narrow the width by slitting in a) pattern and form the entire length of the heating element in a structure connected in series.

In this case, since the resistance value and the length of the planar heaters 10a-10c are set in advance, the slitting width of the strips 1a-1d is set to increase in proportion to the length of the heater to match the resistance value.

First, when the wide ribbon 100 wound in a coil shape is continuously supplied as shown in FIG. 7A, three blanks 21a-21c are formed by three punchings per desired unit length as shown in FIG. 7B, and then When the rear end of the unit length ribbon is transferred, it is cut along the cutting line 23 to continuously obtain the unit length ribbons 20a and 20b in which the three first to third blanks 21a to 21c are formed.

Then, in the unit length ribbon 20a shown in FIG. 7B, like the three hatched pattern portions, the first region 25a located in the longitudinal direction from the second blank 21b located at the center of one side end, and Punching the second and third regions 25b, 25c located in the longitudinal direction from the first and third blanks 21a, 21c located on both sides of the other end results in four strips 1a-1d as shown in FIG. 7C. By connecting in series, the entire length of the heating element is extended, the resistance value is increased, and a strip-like planar heating element 1 pattern in which two electrode terminals are connected at one side is obtained.

8A and 8B illustrate a laminating process of a planar heater having a spiral shape using strip-like planar heating elements according to an exemplary embodiment of the present invention, respectively.

The planar heater having a spiral shape may be manufactured using silicon rolls 31 and 33 having two heaters having different diameters, as shown in FIGS. 8A and 8B. That is, the silicon roll 31 set at 100 to 200 ° C. by overlapping the synthetic resin films 3a and 3b that can be used as the insulating layer 3 material on the upper and lower sides of the strip-shaped planar heating element 1, respectively. When (33) is passed in the inclined direction as shown in Fig. 8B, a planar heater having a spiral shape as shown in Fig. 9 is obtained.

In this case, the diameter of the planar heater having the spiral shape obtained is determined according to the diameter difference of the silicon rolls 31 and 33 disposed on the upper and lower parts.

As illustrated in FIG. 8C, the planar heater having the spiral shape may have a lamination process by combining three silicon rolls 35 to 37 having the same diameter and having the heaters built therein.

The planar heater has a spiral shape when the winding work is performed along the outer surface of the Kimchi refrigerator inner box 51, and the strip-shaped planar heating element 1 and the insulating layer 3 of the synthetic resin films 3a and 3b are formed. As it is laminated, it is formed into a thin film with a thickness of about 0.2 to 1 mm and has an elastic force so that the winding workability is very high and the adhesion is high.

On the other hand, the general flat surface heater (10a-10c) is used as the material of the strip-like planar heating element (1) and the insulating layer (3) in the direction perpendicular to the axis of the roll by using the upper and lower silicon rolls with the heater of the same diameter built-in It is obtained by passing through possible synthetic resin films 3a and 3b.

10 is a plan view showing the electrode terminal of the planar heater according to the present invention.

Referring to FIG. 10, each electrode terminal 7 having one end connected to a plug by a power cable 11 is spot welded with a strip-shaped planar heating element 1 and then coated using an insulating film to seal the welded portion. It is also possible.

In the planar heaters 10a-10c using the strip type planar heating elements according to the first to third embodiments, for example, when the width is 50 mm × 1600 mm, 20 strips 1a-1d having a width of 1 mm are arranged. When implementing one structure, the capacity is set to 20W.

In this case, when the first and second electrode terminals 7a and 7b are connected to both ends of the strip-shaped planar heating element 1 and an AC or DC power source is connected between the first and second electrode terminals 7a and 7b. The planar heaters 10a-10c using the planar heating element 1 are excellent in safety because, for example, heat is generated up to 64 degrees when no temperature control is applied.

Accordingly, in order to maintain the temperature of the inner phase in the kimchi refrigerator at about 15 degrees, the planar heaters 10a-10c may be set to generate heat at a temperature of about 30 degrees using, for example, a bimetal or a thermostat.

In this case, the planar heater of the present invention is implemented in a thin film form using the planar heating element (1) made of a strip form, excellent workability and adhesion to the outer surface of the inner wound (51) of the kimchi refrigerator, low-temperature planar heating element with low thermal density As a result of the use of (1), the coating may be performed on the insulating layer 3 of the thin film, thereby forming a thin film heater 10a-10c as a whole. Therefore, since the heat is transferred through the insulating layer 3 of the thin film having a large contact area as the planar heating element 1, the heat transfer efficiency of the heater is high and power consumption can be reduced.

In addition, the present invention can be inexpensively manufactured in a continuous production method using a low-cost Fe-based material without using an expensive material such as Ni as the heating element 1, in particular in a continuous production method using an Fe-based amorphous material It can be manufactured at low cost, resulting in high cost competitiveness.

In the above embodiment, the planar heater uses a planar heating element having a structure in which a plurality of strips are connected in series, but when the total length of the heater is long, the plurality of strips are connected in parallel or in a combination of series and parallel methods. It is also possible to configure a surface heating element.

      1 is a cross-sectional view showing the internal structure of a conventional kimchi refrigerator,

      2 is a cross-sectional view of a kimchi refrigerator having a planar heater according to an embodiment of the present invention,

      Figure 3 is a perspective view of the inner box of the kimchi refrigerator of Figure 2,

      4A and 4B are a plan view showing a planar heater using a strip type planar heating element according to a first embodiment of the present invention, and a cross-sectional view taken along line A-A 'of FIG. 4A,

5A and 5B are plan views showing planar heaters using a strip type planar heating element according to a second preferred embodiment of the present invention, respectively, and a cross-sectional view taken along line B-B 'of FIG. 5A;

Figure 6a is a plan view showing a planar heater using a strip-like planar heating element according to a third embodiment of the present invention,

6B and 6C are detailed views illustrating the coupling of the serial connection device in FIG. 6A, respectively, and a plan view of the housing with the upper side removed, and a cross-sectional view taken along line C-C 'of FIG. 6B;

7a to 7c is a process chart showing a slitting process of a strip type planar heating element according to the present invention;

8A and 8B are a cross-sectional view and a plan view respectively showing a laminating process of a planar heater using a strip-like planar heating element according to an embodiment of the present invention;

8C is a cross-sectional view illustrating a laminating process of a planar heater using a strip type planar heating element according to another preferred embodiment of the present invention,

9 is a perspective view showing a spiral planar heater obtained through the laminating process of FIG. 8A;

10 is a plan view showing the electrode terminal of the planar heater according to the present invention.

* Description of Signs of Main Parts of Drawings *

1: planar heating element 1a-1d: strip

1e-1g: connection 3: insulation layer

3a, 3b: synthetic resin film 5a, 5b: fuse

7,7a, 7b: electrode terminal 9: bimetal

10a-10c: surface heater 11: power cable

15: serial connection device 15a, 15b: conductive connection

15c: housing 15d: groove

20a, 20b: unit length ribbon 21a-21c: blank

23: cut line 25a-25c: first-third region

31,33,35-37: Silicon Roll 100: Ribbon

151-154: Stopper

Claims (13)

In the kimchi refrigerator having a kimchi storage for storing and ripening kimchi, Internal wounds to receive stocks; An evaporator wound around an upper side of the inner phase to cool the inside of the inner phase; And A surface heater wound around the lower side of the inner phase and dissipating heat into the inner phase; The surface heater is A strip-like planar heating element in which heat is generated when a power is applied to both ends of the strip, and a plurality of strips arranged in parallel at intervals, an insulating layer coated in a plate shape on the outer circumference of the strip-shaped planar heating element, and the insulating layer It is coupled to the outside of one end of the serial connection means for connecting the adjacent strip of the strip-like planar heating element in series, The serial connection means A housing having a rectangular groove on one side and having one end of the planar heater inserted therein; And a plurality of conductive connectors having a pair of stoppers for respectively connecting the ends of the adjacent strip pairs through the insulating layer when drawing out the planar heater inserted into the recess of the housing. Kimchi refrigerator with a heater. The kimchi refrigerator having a planar heater of claim 1, wherein the strip-shaped planar heating element is made of an amorphous strip or FeCrAl. delete delete According to claim 1, wherein the strip-shaped planar heating element Kimchi refrigerator having a planar heater, characterized in that formed in a spiral shape. delete delete delete The kimchi refrigerator having a planar heater of claim 2, wherein the amorphous strip is set to a thickness of 10 to 50 µm, and the heater is 0.2 to 1 mm thick. delete delete delete delete

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