KR20090038295A - Refrigerator and capillary tube install method thereof - Google Patents

Abstract

A refrigerator and a capillary tube installation method thereof are provided to increase the heat exchange efficiency of the capillary tube and suction tube by rolling the capillary tube around the circumference of the suction tube. A refrigerator comprises a suction tube(137) and a capillary tube(131). One end of the suction tube is connected to an evaporator(135) and the other end is connected to a compressor(121). The capillary tube is rolled around the circumference of the suction tube in order to heat exchange.

Description

REFRIGERATOR AND CAPILLARY TUBE INSTALL METHOD THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator and a capillary tube installation method thereof, and more particularly, to a refrigerator and a capillary tube installation method capable of increasing an amount of heat exchange between a suction pipe and a capillary tube.

As is well known, a refrigerator is an apparatus for storing food in a low temperature state having a refrigerator body in which a cooling chamber is formed and a refrigeration cycle component for providing cold air to the cooling chamber.

The refrigeration cycle components include a compressor for compressing a refrigerant, a condenser for dissipating and condensing the refrigerant compressed by the compressor, an expansion device for condensing and expanding the refrigerant passing through the condenser, and the expanded refrigerant to evaporate latent heat. Evaporator is provided to perform the cooling function while absorbing and evaporating.

1 is a configuration diagram of a refrigeration cycle of a conventional refrigerator, FIG. 2 is a view illustrating a coupling state of a suction tube and a capillary tube of FIG. 1, and FIG. 3 is a cross-sectional view of the suction tube and the capillary tube of FIG. 2. As shown in FIG. 1, the refrigerator includes a refrigerator main body 10 having a freezer compartment 12, a refrigerating compartment 14, and a machine compartment 16 formed with a partition wall formed in a vertical direction, and a compressor for compressing a refrigerant. (21), a wire condenser 23 disposed on one side of the compressor 21 to dissipate the refrigerant, and a hotline arranged to prevent dew condensation on the front openings of the freezing chamber 12 and the refrigerating chamber 14 ( 25, a capillary tube 27 for expanding the refrigerant via the hotline 25, and an evaporator 29 disposed inside the main body 10 to perform a cooling operation. Here, the compressor 21 and the wire condenser 23 are usually arranged inside the machine room 16. One side of the wire condenser 23 is provided with a blowing fan 24 to promote heat dissipation of the wire condenser 23.

The refrigerant via the capillary tube 27 is connected to the inlet side of the evaporator 29, and the refrigerant via the evaporator 29 is connected to the suction side of the compressor 21 by the suction tube 32. It is sucked into the compressor 21.

On the other hand, the capillary tube 27 is arranged to be heat-exchangeable with the suction tube 32 to promote the evaporation of the refrigerant sucked into the compressor 21 through the suction tube (32). A portion of the capillary tube 27 is disposed inside the machine room 16, and the rest of the capillary tube 27 is in contact with one side of the suction tube 32 as illustrated in FIGS. 2 and 3. The capillary tube 27 is disposed side by side on one side of the suction tube 32 and is coupled by a method such as brazing (brazing), and the like, such as blazing between the capillary tube 27 and the suction tube 32. As a result, the weld 34 is formed.

However, in such a conventional refrigerator, the capillary tube 27 is arranged side by side on one side of the suction tube 32, so that the heat exchange efficiency with the capillary tube 27 per unit length of the suction tube 32 is low. In addition, there is a problem that the overall heat exchange amount of the suction pipe 32 and the capillary tube 27 is insufficient.

Accordingly, an object of the present invention is to provide a refrigerator and a capillary tube installation method thereof capable of increasing the heat exchange efficiency of the suction tube and the capillary tube.

The present invention, in order to achieve the above object, the refrigerator body and the cooling chamber and the machine room is formed; A compressor disposed inside the machine room; A condenser connected to the compressor to dissipate the refrigerant; An evaporator disposed inside the refrigerator main body, the refrigerant absorbing latent heat and evaporating; A suction pipe having one end connected to the evaporator and the other end connected to the compressor; A refrigerator is provided, the capillary tube of which at least one region is spirally wound around the suction tube so as to be heat exchanged.

Here, the suction pipe and the capillary can be welded.

It may further comprise a heat transfer member surrounding the coupling region of the suction pipe and the capillary tube.

In addition, it may be configured to further include a covering member surrounding the coupling region of the suction pipe and the capillary tube.

At this time, it may further include a heat transfer member interposed between the suction tube and the capillary tube.

The covering member may include a heat shrink tube.

In addition, the thermal transfer member may use a thermal grease.

Meanwhile, according to another field of the present invention, a compressor, a condenser connected to the discharge side of the compressor, an evaporator connected to the suction side of the compressor, a suction pipe connected to the outlet side of the evaporator and the suction side of the compressor And a capillary installation method of a refrigerator having a capillary tube connected between the condenser and the evaporator, the method comprising: spirally winding at least one region of the capillary tube around the suction tube; Provided is a capillary installation method of a refrigerator including the step of fixing the capillary wound spirally.

The fixing of the capillary tube may include supplying a filler material to a coupling region of the suction tube and the capillary tube and welding the coupling region.

In addition, the fixing of the capillary may include providing a covering member coupled to a circumference of the coupling region of the suction tube and the capillary tube, and coupling the covering member.

The method may further include interposing a heat transfer member between the suction pipe and the capillary wound spirally before joining the covering member.

As described above, according to the present invention, the heat exchange efficiency per unit length of the suction pipe can be increased by spirally winding the capillary tube around the suction pipe.

Further, according to the present invention, the capillary is spirally wound around the suction pipe, and the heat exchange efficiency can be further increased by covering the coupling area with the heat transfer member.

Further, according to the present invention, the welding operation can be eliminated by spirally winding the capillary tube around the suction pipe and joining the coating member around the coupling region.

Further, according to the present invention, the capillary is spirally wound around the suction pipe and the covering member is coupled around the coupling area, and the welding operation can be eliminated as well as the heat exchange efficiency by interposing a heat transfer member between the suction pipe and the capillary pipe. You can increase it.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

4 is a configuration of a refrigeration cycle of a refrigerator according to an embodiment of the present invention, Figure 5 is a view showing a coupling state of the suction pipe and the capillary tube of Figure 4, Figure 6 is a cross-sectional view taken along the line VI-VI of FIG. 7 is a view for explaining the capillary installation method of the refrigerator of Figure 4, Figure 8 is a cross-sectional view of the capillary installation region of the refrigerator according to another embodiment of the present invention. As shown in FIG. 4, the refrigerator includes a refrigerator main body 110 in which a cooling chamber and a machine chamber 116 are formed, a compressor 121 disposed inside the machine chamber 116, and the compressor 121. A condenser 123 disposed at one side of the evaporator, an evaporator 135 disposed in a wall of the refrigerator main body 110 to perform a cooling function, and a suction pipe connecting the compressor 121 and the evaporator 135 ( 137 and a capillary tube 131 wound around the suction pipe 137 in a spiral shape so as to exchange heat.

The main body 110 is provided with a freezing chamber 112 and a refrigerating chamber 114 with a partition wall formed up and down, and a mechanical chamber 116 formed at the rear lower region.

A compressor 121 for compressing a refrigerant is installed at one side of the machine room 116, and a condenser 123 is connected to a discharge side of the compressor 121 so that the compressed refrigerant can be condensed through heat radiation. One side of the condenser 123 is provided with a blowing fan 125 to facilitate the heat dissipation function of the condenser 123.

The so-called hotline 127 through which the refrigerant via the condenser 123 passes through the freezing chamber 112 and the refrigerating chamber 114 to prevent dew condensation of the front openings of the freezing chamber 112 and the refrigerating chamber 114. Is formed.

The evaporator 135 is installed in the rear region of the refrigerator main body 110, and one end of the suction pipe 137 is connected to the refrigerant outlet side of the evaporator 135. The other end of the suction pipe 137 is connected to the suction side of the compressor 121. As a result, the refrigerant passing through the evaporator 135 is repeatedly sucked and compressed by the compressor 121.

Meanwhile, a capillary tube 131 is connected to a downstream side of the hotline 127 along the moving direction of the refrigerant, and one region of the capillary tube 131 is wound in a coil shape inside the machine room 116. The remaining section of the capillary tube 131 is spirally wound around the suction tube 137 to exchange heat with the suction tube 137. This is to increase the heat exchange efficiency of the capillary tube 137 per unit length of the suction pipe 137 and to increase the total heat exchange amount of the suction tube 137 and the capillary tube 131.

The other end of the capillary 131 is connected to the inlet pipe 139 of the evaporator 135. The capillary tube 131 is spirally wound in contact with the circumferential surface of the suction tube 137 and is integrally coupled to the suction tube 137 by a so-called brazing method. Between the capillary tube 131 and the suction tube 137, a weld 141 by brazing is formed. Here, as shown in FIG. 8, the heat transfer member 145 may be coupled around the coupling region of the capillary tube 131 to increase the heat exchange efficiency of the suction tube 137 and the capillary tube 131. The heat transfer member 145 may be made of aluminum tape having excellent thermal conductivity.

By this configuration, not only the heat exchange efficiency with the capillary tube 131 per unit length of the suction tube 137 is improved, but also the heat exchange efficiency with the capillary tube 131 without increasing the length of the suction tube 137. This can increase the overall refrigeration cycle efficiency.

Hereinafter, the capillary installation method of the refrigerator according to the present invention will be described with reference to FIG. 7. The suction pipe 137 and the capillary tube 131 are respectively prepared, and the capillary tube 131 is wound around the suction tube 137 in a spiral manner. At this time, the inclination of the capillary 131 with respect to the center line C _L of the suction pipe 137 is approximately 45 degrees. The filler metal supply mechanism 161 and the heating mechanism 165 for melting the filler metal to supply filler metal to a coupling region of the suction tube 137 and the capillary tube 131 on one side of the suction tube 137. Place it. Here, the heating mechanism 165 is configured to melt the filler metal by a conventional method such as electrical resistance or high frequency induction heating. Then, while rotating the suction pipe 137, the filler material is supplied to the coupling region of the capillary 131 and the suction pipe 137 while moving the filler material supply mechanism 161 along the suction pipe 137. At this time, the filler metal is melted by the heating mechanism 165, and as shown in FIG. 6, a weld 141 is formed between the suction pipe 137 and the capillary tube 131.

9 is a partial plan view illustrating a coupling state between a suction pipe and a capillary tube of a refrigerator according to another embodiment of the present invention, and FIG. 10 is a cross-sectional view taken along the line VII-VII of FIG. 9. Hereinafter, the same or equivalent components as those described above and shown in the drawings will be omitted for convenience of description of the drawings and will be described with reference to the same reference numerals. As shown in these drawings, the refrigerator includes a main body 110 in which a cooling chamber and a machine chamber 116 are formed, a compressor 121 disposed inside the machine chamber 116, and a compressor 121. A condenser 123 disposed on one side, an evaporator 135 disposed in a wall of the main body 110 to perform a cooling function, and a suction pipe 137 connecting the compressor 121 and the evaporator 135. And a capillary tube 131 in which at least one region is wound around the suction tube 137, and a covering member 146 coated around the coupling region of the capillary tube 131.

A portion of the capillary tube 131 is spirally wound around the suction tube 137, and the capillary tube 131 is wound at an angle of about 45 degrees with respect to the center of the suction tube 137.

On the other hand, the heat transfer member 151 is interposed between the suction pipe 137 and the capillary tube 131 to facilitate heat exchange. The heat transfer member 151 preferably uses a thermal grease in the form of a liquid or a gel that is easily in contact with the surfaces of the suction tube 137 and the capillary tube 131, respectively. This is to suppress the formation of an air layer in which heat transfer is insufficient between the capillary tube 131 and the suction tube 137 and to increase the heat exchange area by increasing the heat exchange area.

 A covering member 146 is coupled to the suction region of the suction tube 137 and the capillary tube 131 so that the capillary tube 131 may be fixed around the suction tube 137. The covering member 146 is preferably composed of a tape coated with an adhesive material on one surface. This is to reduce the manufacturing time and cost by excluding the welding work that takes a relatively long time when the suction pipe 137 and the capillary 131 are coupled. Here, the covering member 146 may be made of a thermally conductive member, for example, aluminum tape (Al tape) so as to further enhance the heat exchange efficiency of the capillary tube 131 and the suction tube 137.

By such a configuration, when the capillary tube 131 is to be installed around the suction pipe 137, the suction pipe 137 is spirally wound around the suction pipe 137. Next, a heat transfer member 151 such as a thermal grease is injected into the mutual contact area between the suction pipe 137 and the capillary tube 131. When the covering member 146 is bonded to the suction tube 137 while surrounding the circumference of the capillary tube 131 using an adhesive covering member 146, the capillary tube 131 is connected to the suction tube 137. It is fixed integrally to allow heat transfer.

11 is a partial plan view of a capillary installation region of a refrigerator according to still another embodiment of the present invention, and FIG. 12 is a cross-sectional view taken along the line II-XIII of FIG. 11. As shown in these figures, the refrigerator includes a main body 110 in which cooling chambers 112 and 114 and a machine chamber 116 are formed, a compressor 121 disposed inside the machine chamber 116, and the compressor ( A condenser 123 disposed at one side of the 121, an evaporator 135 disposed in the wall of the main body 110 to perform a cooling function, and a suction pipe connecting the compressor 121 and the evaporator 135. 137, a capillary tube 131 at least one region of which is wound around the suction tube 137, and a covering member 155 that is coated around the coupling region of the capillary tube 131.

A portion of the capillary tube 131 is wound around 45 degrees with respect to the center line of the suction tube 137 in a circumference of the suction tube 137.

A heat transfer member 151, for example, a thermal grease, is interposed between the suction pipe 137 and the coupling region of the capillary pipe 131 so that the heat exchange amount between the suction pipe 137 and the capillary pipe 131 can be increased.

On the other hand, the covering member 155 is composed of a heat shrinkable tube (Heat Shrinkable Tube) or a heat shrinkable film formed of a plastic member that shrinks when heated. This is to reduce the installation time and reduce the manufacturing cost of the capillary tube 131 by excluding a welding operation such as a brazing operation that takes a relatively long time for the operation. Here, the covering member 155 has an inner diameter such that the suction pipe 137, in which the capillary 131 is wound, can be easily inserted.

By such a configuration, when the capillary tube 131 is to be installed around the suction pipe 137, the suction pipe 137 is spirally wound around the suction pipe 137. Next, a heat transfer member 151 such as a thermal grease is injected into the mutual contact area between the suction pipe 137 and the capillary tube 131. Next, the coupling region of the suction tube 137 and the capillary tube 131 is inserted into the coating member 155 composed of a heat shrink tube, and the coating member 155 is heated so that the coating member 155 is connected to the suction tube. 137 and the capillary 131 to be in close contact with the surface of the shrinkage deformation.

1 is a configuration of a refrigeration cycle of a conventional refrigerator,

2 is a view showing a coupling state of the suction pipe and the capillary tube of FIG.

3 is a cross-sectional view of the suction tube and capillary tube of FIG.

4 is a configuration diagram of a refrigeration cycle of a refrigerator according to one embodiment of the present invention;

5 is a view showing a coupling state of the suction pipe and the capillary tube of FIG.

6 is a cross-sectional view taken along line VI-VI of FIG. 5,

7 is a view for explaining a capillary installation method of the refrigerator of Figure 4,

8 is a cross-sectional view of the capillary installation region of the refrigerator according to another embodiment of the present invention;

9 is a partial plan view showing a coupling state of the suction pipe and the capillary of the refrigerator according to another embodiment of the present invention;

10 is a cross-sectional view taken along the line VII-VII of FIG. 9;

11 is a partial plan view of a capillary installation region of a refrigerator according to another embodiment of the present invention;

12 is a cross-sectional view taken along the line II-XIII of FIG. 11.

Explanation of symbols on the main parts of the drawings

110: refrigerator body 116: machine room

121: compressor 123: condenser

131 capillary 135 evaporator

137: suction pipe 141: weld

145: covering member 161: filler material supply mechanism

165: heating mechanism

Claims (11)

A refrigerator body in which a cooling chamber and a machine chamber are formed; A compressor disposed inside the machine room; A condenser connected to the compressor to dissipate the refrigerant; An evaporator disposed inside the refrigerator main body, the refrigerant absorbing latent heat and evaporating; A suction pipe having one end connected to the evaporator and the other end connected to the compressor; And at least one region comprising a capillary tube spirally wound around the suction tube so as to be heat exchanged. The refrigerator according to claim 1, wherein the suction pipe and the capillary tube are welded together. The refrigerator according to claim 2, further comprising a heat transfer member surrounding a coupling area between the suction pipe and the capillary tube. The refrigerator according to claim 1, further comprising a covering member surrounding a coupling area between the suction pipe and the capillary tube. The refrigerator according to claim 4, further comprising a heat transfer member interposed between the suction tube and the capillary tube. The refrigerator of claim 4, wherein the covering member comprises a heat shrink tube. The refrigerator according to claim 5 or 6, wherein the heat transfer member includes a thermal grease. A compressor, a condenser connected to the discharge side of the compressor, an evaporator connected to the suction side of the compressor, a suction pipe connected to the outlet side of the evaporator and the suction side of the compressor, and connected between the condenser and the evaporator As a capillary installation method of a refrigerator provided with a capillary tube, Spirally winding at least one region of the capillary around the suction tube; Capillary installation method of the refrigerator comprising the step of fixing the capillary wound spirally. The method of claim 8, wherein the fixing of the capillary tube comprises supplying a filler material to the coupling region of the suction tube and the capillary tube, and welding the coupling region. The method of claim 8, wherein the fixing of the capillary comprises the steps of: providing a cover member coupled to the circumference of the coupling region of the suction tube and the capillary tube; and coupling the cover member. Capillary installation method. The method of claim 10, further comprising a step of interposing a heat transfer member between the suction pipe and the capillary wound spirally before joining the covering member.

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