JP3891907B2 - Evaporator and refrigerator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides an evaporator that performs heat exchange between a heated object (for example, water, brine, etc.) and a refrigerant to cool the heated object and boil and vaporize the refrigerant, and a refrigeration equipped with the evaporator. Related to the machine.
[0002]
[Prior art]
For example, in a large-scale structure such as a building, a heated object cooled by a refrigerator is circulated in a premises through a pipe laid in the structure, and is cooled by exchanging heat with air in a room.
[0003]
An example of a conventional evaporator provided in this refrigerator is shown in FIG.
The evaporator 1 shown in FIG. 8 includes a plurality of heat transfer tube groups 3a including a cylindrical container 2 into which a refrigerant is introduced, and a large number of heat transfer tubes 3 disposed in the container and through which cold water (heated material) flows. -3d, a perforated plate (plate body) 5 extending below the heat transfer tube groups 3a-3d and having a large number of holes 4 formed therein, and disposed below the container 14 in the container tangential direction. The heat transfer tube groups 3a to 3d are arranged spaced apart from each other in the horizontal direction by extraction rows (gap) 7a to 7c extending along a virtual plane located substantially in the vertical direction. Has been. A large number of holes 4 formed in the perforated plate 5 are randomly and uniformly formed in the perforated plate (see, for example, Patent Document 1).
The heat transfer tube 3 has a shape such as a reentrant tube having irregularities on its surface, or a shape such as a smooth tube whose surface shape is a curved surface.
[0004]
In the evaporator 1 having the above-described configuration, the refrigerant introduced from the refrigerant introduction pipe 6 is contained in the heat transfer pipe groups 3a to 3d and the extraction line 7a from the numerous holes 4 formed in the porous plate 5 while containing refrigerant bubbles. ˜7c is ejected toward the inside and filled up to the position where the heat transfer tube groups 3a to 3d are immersed. The refrigerant around the heat transfer tube 3 exchanges heat with cold water through the heat transfer tube 3 to evaporate and vaporize, and become bubbles and escape upward from the container. At this time, the amount of bubble generation due to evaporation is large in a region where the temperature difference from cold water is large, and the amount of bubble generation due to evaporation is small in a region where the temperature difference from cold water is small.
[0005]
(Patent Document 1)
Japanese Patent Application No. 2000-357022
[0006]
[Problems to be solved by the invention]
By the way, in the evaporator constituting the conventional refrigerator, since the holes formed in the porous body are formed regardless of the shape of the heat transfer tube disposed in the container, the bubbles mixed in the refrigerant are transferred to each heat transfer tube. It is introduced evenly within the group.
Therefore, when a heat transfer tube having irregularities on the surface is provided, the surface shape of the tube is a shape that promotes evaporation of the refrigerant, and the attachment of bubbles from the outside is not preferable for the evaporation effect. In other words, there is a problem that the heat transfer coefficient is lowered because bubbles are supplied around the heat transfer tube.
In addition, when a heat transfer tube having a smooth curved surface is provided, the surroundings of the tube are agitated by bubbles to promote the evaporation of the refrigerant. However, the bubbles floating in the draw line contribute to heat exchange. Therefore, there is a problem that sufficient air bubbles are not supplied around the heat transfer tube and heat exchange performance is deteriorated.
[0007]
In addition, since the refrigerant introduction pipe is located on the lower side of the container and is installed along the tangential direction of the outer peripheral surface of the cylinder orthogonal to the container axis, there is a problem that the curved surfaces are joined to each other and cutting and welding are difficult. there were.
[0008]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an evaporator and a refrigerator that can be easily processed while improving cooling efficiency by improving heat exchange performance.
[0009]
[Means for Solving the Problems]
The present invention employs the following means in order to solve the above problems.
The invention according to claim 1 is a plurality of heat transfer tubes comprising a container into which a refrigerant is introduced, and a plurality of heat transfer tubes disposed in the container and through which a heated material that heats the refrigerant to boil and vaporize flows. A heat pipe group, a plate body below the heat transfer pipe group, extending in a substantially horizontal plane and having a large number of holes, and a refrigerant introduction pipe for introducing the refrigerant to the lower side of the container. The adjacent heat transfer tube groups are evaporators arranged in a horizontal direction so as to be separated from each other by a gap extending along a virtual plane positioned substantially in the vertical direction, wherein the plurality of holes are at least 1 It extends in the same direction as the heat transfer tube group in two or more rows , each heat transfer tube is configured to have irregularities on the surface thereof, and the plurality of holes are positioned substantially vertically below the gap. It is characterized by being formed .
[0010]
According to the evaporator of the present invention, the refrigerant mixed with bubbles can be introduced into the container in accordance with the heat exchange performance of the heat transfer tube disposed in the container, thereby improving the heat transfer performance. be able to.
Further, according to the evaporator according to the present invention, the bubbles mixed in the introduced refrigerant float up in the extraction line, so that the introduction of bubbles around the heat transfer tube can be suppressed, and thus has an uneven shape. A refrigerant suitable for heat transfer of the heat transfer tube can be introduced.
[0011]
The invention according to claim 2 is a plurality of heat transfer tubes comprising a container into which a refrigerant is introduced, and a plurality of heat transfer tubes that are disposed in the container and through which a heated material that heats and boiles the refrigerant flows. A heat pipe group, a plate body below the heat transfer pipe group, extending in a substantially horizontal plane and having a large number of holes, and a refrigerant introduction pipe for introducing the refrigerant to the lower side of the container. The adjacent heat transfer tube groups are evaporators arranged in a horizontal direction so as to be separated from each other by a gap extending along a virtual plane positioned substantially in the vertical direction, wherein the plurality of holes are at least 1 The heat transfer tube group extends in the same direction as two or more rows, each of the heat transfer tubes is configured to have a smooth surface, and the plurality of holes are substantially vertically below the heat transfer tube group. It is formed so that it may be located in .
[0012]
According to the evaporator of the present invention, the refrigerant mixed with bubbles can be introduced into the container in accordance with the heat exchange performance of the heat transfer tube disposed in the container, thereby improving the heat transfer performance. be able to.
Further, according to the evaporator according to the present invention, the bubbles mixed in the introduced refrigerant can stir the refrigerant around the heat transfer tube, so that the refrigerant suitable for heat transfer of the heat transfer tube having a smooth curved surface is introduced. can do.
[0017]
According to a third aspect of the present invention, there is provided a plurality of heat transfer pipes comprising a container into which a refrigerant is introduced, and a plurality of heat transfer tubes that are disposed in the container and through which a heated material that heats the refrigerant to boil and vaporize flows. A heat pipe group and a refrigerant introduction pipe for introducing the refrigerant to the lower side of the container, and the adjacent heat transfer pipe groups are mutually connected in a horizontal direction by a gap extending along a virtual plane positioned substantially in the vertical direction. In a separately disposed evaporator, the plate body is disposed so as to be positioned substantially horizontally below each heat transfer tube group, and has a slit at a position below each gap, and the slit of the plate body A pair of rising plate bodies that rise upward in the gap, and a refrigerant that is located above the pair of rising plate bodies and moves upward through a gap between the slit and the pair of rising plate bodies And bubbles mixed in the refrigerant Characterized in that it provided a guide plate for guiding the heat transfer tube direction.
[0018]
According to the evaporator according to the present invention, since the heat transfer tubes disposed above the heat transfer tube group can be sufficiently immersed in the refrigerant liquid, the heat exchange performance can be improved.
[0019]
According to a fourth aspect of the present invention, in the evaporator according to any one of the first to third aspects, a refrigerant introduction pipe for introducing a refrigerant into the container is disposed below the container and orthogonal to the container. It is characterized by.
[0020]
According to the evaporator according to the present invention, when the refrigerant introduction pipe is attached to the container, cutting, welding, and the like are facilitated, and workability can be improved.
[0021]
The invention according to claim 5 is the evaporator according to any one of claims 1 to 4, a compressor that compresses the gaseous refrigerant, and the condensed gaseous refrigerant is cooled, condensed, and liquefied. A condenser and an expansion valve for decompressing the liquefied refrigerant are provided.
[0022]
According to the refrigerator according to the present invention, since the heat exchange rate of the heat transfer tube in the evaporator is increased as described above, the same performance as the conventional one can be obtained even if energy consumption is suppressed.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show a first embodiment of the present invention.
FIG. 1 shows a schematic configuration of the refrigerator. The refrigerator shown in this figure has a condenser 10 that condenses and liquefies the refrigerant by exchanging heat between the cooling water and the gaseous refrigerant, and an expansion valve 11 that decompresses the condensed refrigerant. An evaporator 12 that performs heat exchange between the refrigerant and the heated material (cold water) to cool the cold water, and a compressor 13 that introduces the refrigerant evaporated and vaporized in the evaporator 12 into the condenser 10 after compression. It is composed of
[0024]
FIG. 2 shows the configuration of the evaporator 12.
The evaporator 12 shown in FIG. 2 includes a plurality of heat transfer pipes 15 including a cylindrical container 14 into which a refrigerant is introduced and a large number of heat transfer tubes 15 that are arranged in a region below the center position in the container and through which cold water flows. Heat tube groups 15a to 15d, a perforated plate (plate body) 17 below the heat transfer tube groups 15a to 15d and extending in a substantially horizontal direction to form a large number of holes 16, and below the container. And a refrigerant introduction pipe 18 installed along the tangential direction of the cylindrical surface perpendicular to the axial direction of the container.
[0025]
Each of the heat transfer tubes 15 is configured to have irregularities on the surface thereof, and the heat transfer tube group is mutually aligned in the horizontal direction by extraction rows (voids) 19a to 19c extending along a virtual plane located substantially in the vertical direction. They are spaced apart.
A large number of holes 16 formed in the perforated plate 17 are substantially vertically below each of the extraction rows 19a to 19c, and are formed along the longitudinal direction of the container.
[0026]
Also, above the container 14, a refrigerant discharge port 20 for discharging the evaporated refrigerant to a compressor (not shown), a demister 21 for removing refrigerant droplets mixed in the refrigerant during evaporation, and the demister in the container 14, a bottom plate 22 that supports the demister 21 in the container from below, and a demister frame 23 that supports the demister 21 together with the bottom plate 22 from above the container.
[0027]
In the evaporator 12 having the above-described configuration, the refrigerant is introduced into the container 14 from the refrigerant introduction pipe 18 including bubbles, and is blown out from the holes 16 toward the extraction lines 19a to 19c and spreads in the container. The heat transfer tube groups 15a to 15d are filled up to a position where the refrigerant is immersed. The refrigerant exchanges heat with the cold water flowing through the heat transfer tube 15 through the surface of the heat transfer tube 15, takes heat from the cold water, and is evaporated and vaporized. Most of the bubbles introduced by mixing in the refrigerant do not enter the heat transfer tube groups 15a to 15d and escape upward along the extraction rows 19a to 19c, so that they stay around the heat transfer tube 15 for a long time. There is no.
[0028]
According to the evaporator in this refrigerator, since the amount of introduction of bubbles into the heat transfer tube group is suppressed, the heat transfer tube surface shape is a shape that promotes the evaporation of the refrigerant, and the adhesion of bubbles from outside evaporates. Therefore, it is possible to improve the heat exchange performance by introducing a refrigerant suitable for heat transfer in the heat transfer tube having irregularities on the surface.
[0029]
FIG. 3 shows a second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the component already demonstrated in the said embodiment, and description is abbreviate | omitted.
The schematic configuration of the refrigerator is the same as that shown in FIG.
The evaporator 12 shown in FIG. 3 has the same configuration as that of the first embodiment, but each of the heat transfer tubes 15 is configured to have a smooth surface, and is formed on the porous plate 17. A large number of holes 16 are located substantially vertically below the heat transfer tube groups 15a to 15d and are formed along the longitudinal direction of the container.
[0030]
In the evaporator 12 having the above-described configuration, the refrigerant is introduced into the container 14 from the refrigerant introduction pipe 18 including bubbles, and is ejected from the holes 16 toward the inside of the heat transfer pipe groups 15a to 15d. The installed heat transfer tube groups 15a to 15d are filled up to the position where the refrigerant is immersed. The refrigerant exchanges heat with the cold water flowing through the heat transfer tube 15 through the surface of the heat transfer tube 15, takes heat from the cold water, and is evaporated and vaporized. The air bubbles mixed and introduced into the refrigerant flow upward between the heat transfer tubes 15 while stirring the refrigerant liquid staying around the heat transfer tubes 15 together with the bubbles generated as the refrigerant evaporates.
[0031]
According to the evaporator in this refrigerator, since the introduction amount of bubbles into the heat transfer tube group is promoted, it is preferable that the surface around the heat transfer tube be stirred by the bubbles from the outside is preferable for the evaporation action. In a smooth heat transfer tube, it is possible to improve the heat exchange performance by introducing a refrigerant suitable for heat transfer.
[0032]
FIG. 4 shows a third embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the component already demonstrated in the said embodiment, and description is abbreviate | omitted.
The schematic configuration of the refrigerator is the same as that shown in FIG.
The evaporator 12 shown in FIG. 4 includes a plurality of heat transfer tube groups 15a to 15d including a container 14 having a cylindrical shape into which a refrigerant is introduced, and a large number of heat transfer tubes 15 disposed in the container and through which cold water flows. The refrigerant introduction pipe 18 that is obliquely below the container 14 and into which the refrigerant is introduced has a curved surface along the lower inner surface of the container 14 and has a large number of holes 16 extending below the heat transfer tube groups 15a to 15d. And a perforated plate 17.
[0033]
The heat transfer tube groups 15a to 15d are spaced apart from each other in the horizontal direction by gaps 19a to 19c extending along a virtual plane positioned substantially in the vertical direction, and the heat transfer tubes 15 are arranged in the heat transfer tube group 15a. The lower part of ˜15d is arranged along the perforated plate 17 in an arc shape.
The refrigerant introduction pipe 18 is joined at right angles to a circular hole formed in the cylindrical surface of the container 14 in accordance with the outer diameter of the pipe.
[0034]
In the evaporator 12 having the above-described configuration, the refrigerant introduced from the refrigerant introduction pipe 18 collides perpendicularly to the perforated plate 17 and diffuses in a circular arc shape on the lower surface of the container, and then enters the heat transfer pipe groups 15 a to 15 d from the holes 16. Erupted into.
[0035]
According to the evaporator in this refrigerator, the number of machining of the curved surface is reduced compared to the conventional method for joining the refrigerant introduction pipe to the container, and the joining can be easily performed. Since it can be provided, the same number of heat transfer tubes as in the conventional case can be provided even with a small-diameter container, whereby the heat exchange performance can be maintained.
[0036]
FIG. 5 shows a fourth embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the component already demonstrated in the said embodiment, and description is abbreviate | omitted.
The schematic configuration of the refrigerator is the same as that shown in FIG.
The evaporator 12 shown in FIG. 5 has the same configuration as that of the third embodiment, but the plate width of the perforated plate 17 is in the vicinity of the refrigerant introduction pipe 18 and is positioned below the heat transfer tube groups 15c and 15d. It is limited and installed.
[0037]
In the evaporator 12 having the above-described configuration, the refrigerant is mainly ejected from the hole 16 toward the heat transfer tube groups 15c and 15d, and the refrigerant around the heat transfer tube 15 disposed in the heat transfer tube groups 15c and 15d Stirred by air bubbles that enter.
[0038]
According to the evaporator in this refrigerator, the same effect as that of the third embodiment can be obtained, and the temperature difference between the refrigerant and the cold water is small, so that heat exchange is particularly required for the refrigerant around the heat transfer tube. By arranging the perforated plate in the vicinity of the heat tube group, the heat transfer coefficient can be improved.
[0039]
In addition, in said 1st-4th embodiment, even if the shape of many holes currently formed in the porous body is a round hole, a long hole, a slit, etc., the same effect can be acquired.
[0040]
FIG. 6 shows a fifth embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the component already demonstrated in the said embodiment, and description is abbreviate | omitted.
The schematic configuration of the refrigerator is the same as that shown in FIG.
The evaporator 12 shown in FIG. 6 includes a container 14 into which a refrigerant is introduced, a plurality of heat transfer tube groups 15a to 15d including a plurality of heat transfer tubes 15 disposed in the container 14 and through which cold water flows, A refrigerant introduction pipe 18 into which the refrigerant is introduced is provided substantially vertically below.
The heat transfer tube groups 15a to 15d are spaced apart from each other in the horizontal direction by extraction rows 19a to 19c extending along a virtual plane positioned substantially in the vertical direction.
[0041]
Below the container 14, a plate body 21 having a slit 20 at each lower position of the extraction rows 19 a to 19 c and extending to a lower region of the heat transfer tube groups 15 a to 15 d, and each slit 20 of the plate body 21. And a pair of rising plates 22 rising upward in the respective extraction rows 19a to 19c, and positioned above the pair of rising plates 22 and in the extraction rows 19a to 19d, the slit 20 A guide plate 24 that guides the refrigerant moving upward through the gap 23 formed between the pair of rising plate bodies 22 and the bubbles mixed in the refrigerant in the direction of each heat transfer tube 15 is provided.
At least one slit 20 is formed in the extending direction of the heat transfer tubes depending on the arrangement positions of the extraction rows 19 a to 19 c in the container 14.
[0042]
In the evaporator 12 having the above-described configuration, the refrigerant containing bubbles introduced from the refrigerant introduction pipe 18 installed almost immediately below the container 14 spreads evenly on the surface of the plate body 21 along the plate body, and the slit 20. Then, it passes through the gap 23 between the rising plate bodies 22, is folded back on the guide plate 24, and pours down from the upper side of the heat transfer tube groups 15 a to 15 d toward the heat transfer tubes 15.
[0043]
According to the evaporator in this refrigerator, the heat transfer tube disposed above the heat transfer tube group whose surface is easily dried by evaporation of the refrigerant is also sufficiently immersed in the refrigerant, resulting in a decrease in heat transfer coefficient. Is suppressed.
[0044]
When a plurality of slits are formed at the same extraction arrangement position, the same operation and effect are obtained even if the slit length and the slit interval differ depending on the extraction arrangement position.
As a substitute for the slit, the slit plate 22 may be a cylindrical tube.
[0045]
FIG. 7 shows a sixth embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the component already demonstrated in the said embodiment, and description is abbreviate | omitted.
The schematic configuration of the refrigerator is the same as that shown in FIG.
The evaporator 12 shown in FIG. 7 has the same configuration as the above-described evaporator, but the refrigerant introduction pipe 18 extends in the length direction of the heat transfer pipe 15 from the cold water inlet 24 side for supplying cold water to the heat transfer pipe group 15a. It is arranged in the back area exceeding 1/2 and in the back area exceeding 1/2 in the width direction perpendicular to the length direction of the heat transfer tubes 15 from the heat transfer tube group 15a to 15c. It is installed.
[0046]
In the evaporator 12 having the above-described configuration, the bubbles mixed in the refrigerant introduced from the refrigerant introduction pipe 18 are arranged in a region where the temperature difference between the cold water flowing through the heat transfer pipe 15 and the refrigerant is small. The surrounding refrigerant is agitated more and new refrigerant is constantly supplied around the heat transfer tube 15.
[0047]
According to the evaporator in this refrigerator, since the temperature difference between the cold water and the refrigerant is small depending on the installation position of the refrigerant introduction pipe, the heat transfer coefficient can be improved even in a region where the heat transfer coefficient is small.
[0048]
【The invention's effect】
The present invention described above has the following effects.
According to the first aspect of the present invention, it is possible to introduce a refrigerant mixed with bubbles into the container so as to match the heat exchange performance of the heat transfer tube disposed in the container, thereby improving the heat transfer performance. Can do.
In addition, since air bubbles mixed in the introduced refrigerant float up in the line, it is possible to suppress the introduction of air bubbles around the heat transfer tube, and to improve the heat transfer performance on the surface of the heat transfer tube having an uneven shape. Can do.
[0049]
The invention according to claim 2 can introduce the refrigerant into which the bubbles are mixed so as to match the heat exchange performance of the heat transfer tube disposed in the container, thereby improving the heat transfer performance. Can do .
Moreover, the refrigerant | coolant around a heat exchanger tube can be stirred by the bubble mixed with the refrigerant | coolant introduce | transduced, and the heat transfer performance in the heat exchanger tube surface which consists of a smooth curved surface can be improved.
[0052]
In the invention according to claim 3, since the heat transfer tube disposed above the container can be sufficiently immersed in the refrigerant liquid, the heat exchange performance can be improved.
[0053]
In the invention according to claim 4, when attaching the refrigerant introduction pipe to the container, cutting, welding, and the like are facilitated, and workability can be improved.
[0054]
In the invention according to claim 5, since the heat exchange rate of the heat transfer tube in the evaporator is increased, the same performance as the conventional one can be obtained even if energy consumption is suppressed.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic configuration of a refrigerator to which an evaporator according to a first embodiment of the present invention is applied.
FIG. 2 is a cross-sectional configuration diagram showing an overall outline of an evaporator according to a first embodiment of the present invention.
FIG. 3 is a cross-sectional configuration diagram of an evaporator according to a second embodiment of the present invention.
FIG. 4 is a cross-sectional configuration diagram of an evaporator according to a third embodiment of the present invention.
FIG. 5 is a cross-sectional configuration diagram of an evaporator according to a fourth embodiment of the present invention.
FIG. 6 is a cross-sectional configuration diagram of an evaporator according to a fifth embodiment of the present invention.
FIG. 7 is a plan configuration diagram of an evaporator according to a sixth embodiment of the present invention.
FIG. 8 is a cross-sectional configuration diagram of a conventional evaporator.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Condenser 11 Expansion valve 12 Evaporator 13 Compressor 14 Container 15 Heat transfer tube 16 Hole 17 Perforated plate (plate body)
18 Refrigerant introduction pipe 19 Extraction line (gap)
20 Slit 21 Plate 22 Standing Plate 23 Gap 24 Guide Plate

Claims (5)

A container into which a refrigerant is introduced; a plurality of heat transfer pipe groups each including a plurality of heat transfer pipes that are disposed in the container and through which a heated product that boils and vaporizes the refrigerant is circulated; and below the heat transfer pipe group A plate body extending in a substantially horizontal plane and having a plurality of holes formed therein, and a refrigerant introduction pipe for introducing the refrigerant to the lower side of the container, and the adjacent heat transfer tube group includes: An evaporator disposed horizontally apart from each other by a gap extending along a virtual plane located in a substantially vertical direction,
The plurality of holes extending in the same direction as the heat transfer tube group in at least one row ;
Each of the heat transfer tubes is configured to have irregularities on the surface thereof, and the numerous holes are formed so as to be positioned substantially vertically below the gap . A container into which a refrigerant is introduced; a plurality of heat transfer pipe groups each including a plurality of heat transfer pipes that are disposed in the container and through which a heated product that boils and vaporizes the refrigerant is circulated; and below the heat transfer pipe group A plate body extending in a substantially horizontal plane and having a plurality of holes formed therein, and a refrigerant introduction pipe for introducing the refrigerant to the lower side of the container, and the adjacent heat transfer tube group includes: An evaporator disposed horizontally apart from each other by a gap extending along a virtual plane located in a substantially vertical direction,
The plurality of holes extending in the same direction as the heat transfer tube group in at least one row ;
The evaporator is characterized in that each heat transfer tube has a smooth surface, and the plurality of holes are formed so as to be positioned substantially vertically below the heat transfer tube group . A container into which a refrigerant is introduced, a plurality of heat transfer tube groups each including a plurality of heat transfer tubes disposed in the container, the heating object being heated to boil and vaporize the refrigerant, and below the container An evaporator having a refrigerant introduction pipe for introducing the refrigerant, wherein the adjacent heat transfer pipe groups are spaced apart from each other in a horizontal direction by a gap extending along a virtual plane positioned substantially in a vertical direction. Because
A plate body which is disposed so as to be positioned substantially horizontally below each heat transfer tube group, and has a slit at a position below each gap, and rises upward in the gap so as to face the slit of the plate body. A pair of rising plate bodies, a refrigerant positioned above the pair of rising plate bodies, moving upward through the gap between the slit and the pair of rising plate bodies, and bubbles mixed in the refrigerant are arranged in each heat transfer tube direction. An evaporator characterized by having a guide plate that leads to The evaporator according to any one of claims 1 to 3 , wherein a refrigerant introduction pipe for introducing a refrigerant into the container is disposed at a lower side of the container and orthogonal to the container. An evaporator according to any one of claims 1 to 4, a compressor that compresses a gaseous refrigerant, a condenser that cools and compresses the compressed gaseous refrigerant, and a liquefied refrigerant. A refrigerator having a decompression expansion valve.

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