JPH0886555A - Heat radiating heat exchanger for refrigerator - Google Patents

Abstract

PURPOSE: To improve the heat transfer performance, to reduce the adherence of dusts, and to produce at a low cost without decreasing the performance in an aging manner by cooling a plate condenser so arranged that a drain evaporating tray surface is used as the part of a duct at the upper part of the tray by a forcibly cooling blower. CONSTITUTION: A plate condenser so formed that a drain evaporation tray upper surface 22 is used as the part of a duct is disposed at the upper part of a drain evaporation tray, and the condenser is cooled by a forcibly cooling blower. Then, cooling air in contact with the condenser flows along a radiating plate 1 and collides with a pipe 2 to so flow as shown by an arrow 24 in a vertical direction via a hole formed at a caulking cutout piece 3 to induce the suitable disorder of the air, thereby improving the heat transfer performance. Since the shortest length of various holes is about 4mm or more, dusts are very scarcely stored, and even if stored, most heat transfer surface is opposed to the air, and hence the heat transfer performance is not almost reduced in an aging manner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerant condenser which is disposed in a lower machine room of a refrigerator body and is forcibly cooled by air.

[0002]

2. Description of the Related Art As this type of prior art, there is a structure disclosed in Japanese Utility Model Laid-Open No. 5-73481 shown in FIG.
FIG. 21 is a perspective view of the conventional machine room described in the above publication.
Here, 10 is a fan, 13 is a suction grille, 15 is a compressor, 16 is a fan motor, 18 is a suction duct, 19 is a refrigerator main body, 20 is a refrigerator bottom plate, 24 is a wind flow, 27 is a wire condenser, 28 is cooling. The air outlet port 29 is a suction port.

The machine room structure shown in FIG. 21 has a wire condenser 27 on the bottom of the refrigerator, a suction duct 18 is arranged so as to surround the wire condenser, and a fan 10, a fan motor 16 and a compressor 15 are provided behind it. Have Cooling of the wire condenser and the compressor is performed by cooling air sucked by a fan 10 from a suction grill in front of the refrigerator 13, and the cooling air passes through a duct surrounding the wire condenser and cools the wire condenser. A radiator in the form of a wire condenser, in which air is sent to the rear of the refrigerator through a suction port 29 at the rear of the compressor, the wind is blown to the compressor 15, the compressor is cooled, and then discharged from the cooling air discharge port 28. It was a type of refrigerator that was concentrated in the room and radiated heat using forced convection.

[0004]

Conventionally, as a heat radiating means of a refrigerator, a heat radiating plate which is exposed on the outer surface of the refrigerator and radiates heat by natural convection has been the mainstream. However, as the garbage disposal capacity is approaching the limit, mainly in metropolitan areas, there is an increasing motivation for effective use of resources and reduction of waste, and adoption of a structure that facilitates recycling is urged. Moreover, as the demand for refrigerators grows larger and larger, there is a great demand for a reduction in the actual installation area. For these reasons, a large number of refrigerators are now equipped with a radiator mounted on the outer surface of the refrigerator in a machine room to adopt a heat dissipation method by forced convection.

The actual Kaihei 5-73 described in the above-mentioned prior art.
The refrigerator having the structure disclosed in Japanese Patent No. 481 also adopts a heat dissipation method by forced convection by concentrating radiators in the machine room. In such a refrigerator, when radiating heat by forced convection, if the heat radiating heat exchanger and the like have very small gaps and a large number of gaps like a wire condenser type,
If a filter or the like is not attached to the suction port, there is a problem that dust such as dust is attached to the radiator itself, and the heat transfer performance is significantly deteriorated with time. Further, even when a filter or the like is attached, maintenance of the filter or the like is required, which makes the usability very poor. In addition, since the pipe and wire are fixed by welding, the wire condenser type heat radiating heat exchanger has a problem in that there are many welding points and the manufacturing cost is high.

The present invention solves the above-mentioned problems of the prior art while improving the heat transfer performance, reduces dust adhesion, does not cause a large performance deterioration over time, and can be produced at low cost in a refrigerator. A heat exchanger for use is provided.

[0007]

A first aspect of the present invention relating to a heat radiating heat exchanger for a refrigerator according to the present invention includes a compressor, a drainage evaporating dish, a drainage evaporating radiator in a machine room formed at the bottom of the refrigerator. In a refrigerator equipped with a forced cooling blower or the like, a plate condenser is disposed above the drainage evaporation tray so that the surface of the drainage evaporation tray becomes a part of the duct, and the plate condenser is connected by the forced cooling blower. It is designed to be cooled.

A second aspect of the present invention relating to a heat radiating heat exchanger of a refrigerator is a refrigerator in which a pipe bent in a meandering shape is attached to a thin metal plate by caulking or the like so that most of the pipe is substantially in contact. In the heat radiating heat exchanger, the shortest length of the hole formed by the caulking notch provided in the thin metal plate is set to 4 mm or more, and the bent portion of the meandering pipe is positioned in the thin metal plate. It is the one.

A third aspect of the present invention relating to the heat radiating heat exchanger of the refrigerator according to the present invention, when two or more refrigerators are used per one refrigerator, the plates are overlapped with a space of at least 4 mm or more between them. The pipes that come into contact with each other are arranged outside each other.

A fourth aspect of the present invention relating to a heat radiating heat exchanger of a refrigerator is such that, when two or more refrigerators are stacked and used per refrigerator, the end faces on the windward side during normal use are vertically shifted. Is.

A fifth aspect of the present invention relating to a heat radiating heat exchanger for a refrigerator according to the present invention is such that a cut is made at an appropriate position on the plate so as to cut the plate in a direction parallel to the pipe,
It is manufactured by bending from that portion in the direction in which the pipe is not arranged.

A sixth aspect of the present invention relating to a heat radiating heat exchanger for a refrigerator according to the present invention is characterized in that both ends of a plate in a direction perpendicular to the meandering direction of the pipe are bent in a flange shape to the side where the pipe is not arranged, When two or more heat exchangers for a refrigerator are stacked and used, the flanges are stacked so as to fit or abut each other.

A seventh aspect of the present invention relating to the heat radiating heat exchanger of the refrigerator is one in which a punched out notch fin having a hole of at least 4 mm or more is provided at an appropriate position of the plate.

An eighth aspect of the present invention relating to the heat radiating heat exchanger of the refrigerator according to the present invention is such that the punched notched fins are provided between the pipes so that the projected area between the pipes is increased only by the plate thickness. And a caulking part for fixing the pipe and a caulking part for fixing the root part of the punched-out notch fin, which has a substantially parallel surface with the plate surface at an angle of 0 ° to 45 °. It is provided at the center position of the caulking portion adjacent to.

A ninth aspect of the present invention relating to the heat radiating heat exchanger of the refrigerator according to the present invention is such that the number of the punched-out notch fins is sequentially increased on the leeward side relative to the leeward side.

A tenth aspect of the present invention relating to the heat radiating heat exchanger of the refrigerator of the present invention is such that the size of the punched-out notch fins is increased on the windward side with respect to the leeward side.

The eleventh invention relating to the heat radiating heat exchanger of the refrigerator of the present invention is such that, when two or more refrigerators are stacked and used for one refrigerator, punched-out notch fins are raised inside the plates facing each other. It is a thing.

[0018]

According to the present invention, the heat transfer performance is improved by providing the notched fins while securing the heat transfer area by using the plate-shaped heat dissipation plate, and further, the gap is at least 4 mm.
By the above, the performance deterioration due to dust adhesion and clogging is minimized. Moreover, since there are no welding points, it can be produced at low cost.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 3 is a side sectional view of a refrigerator according to an embodiment of the present invention, showing a location of a heat radiating heat exchanger of the refrigerator of the present invention. Here, 6 is the front machine room cover, 7
Is a heat radiating heat exchanger directly related to the present invention, 8 is an evaporating dish, and 9
Is a base for fixing the compressor, 10 is a fan, 11 is a fan cover, 12 is a machine room, 13 is a suction grille, 14 is a condenser for drainage evaporation, 15 is a compressor, 16 is a fan motor, 17 is the back of the machine room. Cover, 18 is a suction duct, 1
Reference numeral 9 denotes a refrigerator main body, and 20 denotes a refrigerator bottom plate. From the suction grill 13 through the suction duct 18 to the machine room 12
The evaporation tray 8 is arranged below the suction duct 18, and the evaporation tray itself also serves as the lower portion of the duct. The heat radiating heat exchanger 7 is installed in the suction duct formed by the evaporating dish 8 and the lower surface of the heat exchanger upper structure (for example, the refrigerator bottom plate 20). The heat is dissipated by the fan 10
The cooling air is sucked in from the suction grille and passes through the heat radiation heat exchanger installed in the suction duct to absorb heat from the heat radiation heat exchanger and remove heat from the compressor 15 Is discharged to the rear of the refrigerator to radiate heat. The present invention is a heat radiation heat exchanger having a structure for cooling radiators by such forced convection.

FIG. 4 is a top view and a front view of one embodiment of the heat dissipation heat exchanger shown in FIG. 3 according to the present invention.
Shows the AA ′ cross section of FIG. 4. Here, 1 is a heat dissipation plate, 2 is a meandering pipe for refrigerant, 3 is a notch for caulking, and 21 is a notch for caulking. A refrigerant pipe 2 bent in a meandering shape is attached to a heat radiating plate 1 made of a thin metal plate by caulking or the like so that most of the pipe is almost in contact, and the bent portion of the meandering pipe is attached. The heat radiation plate is positioned inside the heat radiation plate, and after the pipe is crimped, the entire heat radiator is painted to reduce the contact thermal resistance between the heat radiation plate and the pipe. In addition, the shortest length of the hole 21 formed by the caulking notch piece provided on the heat dissipation plate is 4
The size is over mm.

With this configuration, the cooling air that strikes the heat exchanger flows along the heat radiating plate 1, and
By hitting the pipe, it also flows vertically through the hole 21 formed by the caulking cutout piece, inducing appropriate air turbulence and improving heat transfer performance. Also, since the minimum length of each hole is 4 mm or more, it is very difficult for dust to be clogged, and even if the holes are clogged with dust, most of the heat transfer surfaces face the air, and the heat transfer performance will change over time. It rarely drops to. Furthermore, since there are no welding points, the energy required for production is extremely low, enabling low-cost production.

FIG. 6 and FIG. 7 show an embodiment in which two or more heat radiating heat exchangers are stacked and used for one refrigerator, and FIG. 8 shows the heat radiating heat exchanger shown in FIG. A cross-sectional view when the is installed in the refrigerator body is shown by an arrow together with the flow of cooling air. FIG. 6 shows that when two or more sheets are stacked, at least two heat-dissipating plates 1 face each other, and pipes 2 that contact the plates are arranged outside each other, and the plates 1 are spaced from each other by at least 4 mm or more. An example in which the ends of the heat dissipation plates are aligned and overlapped is shown.

The effect of this configuration will be described with reference to FIG. 8. The cooling air flowing from the windward side flows along the plates between the plates which are at a high temperature due to the radiation of the plates and the plates. The air flowing on the outside of the plate flows up and down through the hole 21 formed by the caulking notch piece by hitting the pipe, so that the cooling air flows in and out of the plate. A moderate air turbulence is induced by such a breathing effect, and heat transfer performance can be improved. Further, since the distance between the plates is set to 4 mm or more, dust is not easily clogged, and there is almost no blockage due to dust, so that heat transfer performance hardly deteriorates with time.

On the other hand, FIG. 7 shows an embodiment in which the windward (right side of the drawing) end of the heat dissipation plate of the heat dissipation heat exchanger shown in FIG. 6 is vertically displaced. By displacing the ends of the heat radiating plate in this way, the arrangement of the pipes is arranged in a staggered manner, the turbulence of air due to the above-mentioned breathing effect is further increased, and heat transfer performance can be further improved. . Also, by shifting the wind upper end,
The cooling wind that first strikes can positively enter between the plates through the holes formed by the caulking notch pieces, further induce air turbulence, and improve heat transfer performance.

FIG. 9 shows an embodiment of the heat dissipation heat exchanger of the present invention. In FIG. 9, 25 is a plate cutting portion for folding in half. FIG. 9 shows that the plate halves 25 for folding are provided on the entire surface at appropriate positions of the radiating plate 1 of the heat radiating heat exchanger described above so as to cut the plate in a direction parallel to the pipe 2, and the pipe is cut from that portion. By opening the plate by 4 mm or more in the direction in which 2 is not arranged and bending the plates so that they are parallel to each other, and making the bent side the windward side, the two sheets are stacked as shown in the embodiment of FIG. 1 shows an example of a heat dissipation heat exchanger for manufacturing. With such a structure, when using two or more even heat dissipation plates per refrigerator, it is possible to take a very simple two-ply structure without welding pipes or the like. Further, by making the pipe pitches equal, the wind upper end inevitably shifts as shown in FIG. 7 when folding in two, and the same effect as the embodiment shown in FIG. 7 can be obtained. .

FIG. 10 shows an embodiment in which the left and right ends of the heat radiating plate of the embodiment shown in FIG. 9 are raised in a flange shape toward the side where there is no pipe contacting the heat radiating plate. The heat radiating heat exchanger shown in FIG. 10 is moved from the plate-cutting portion for folding in 25 to the direction in which the pipe 2 is not arranged, that is, in the direction in which the flange rises, the distance between the plates is 4 mm.
Open it above and bend it so that the plates are parallel,
It is manufactured in the two-ply shape shown in the embodiment of FIG. At that time, the flanges are fitted together as shown in FIG. 11 or, as shown in FIG. 12, two heat radiation plates are superposed so as to be attached to each other.

With such a structure, the same effect as that of the embodiment shown in FIG. 9 can be obtained. Further, the flange portion not only serves as a strength member as a spacer for maintaining the distance between the two heat dissipation plates, but also the flange itself forms a part of the suction duct that should be formed in the refrigerator main body. The duct can be formed easily and at low cost.

FIG. 13 shows an embodiment in which a heat-dissipating plate is provided with punched-out notched fins having punched holes with a minimum length of 4 mm or more in the embodiment shown in FIG. Here, 4 is a notched fin. The punched-out notch fin 4 is erected between two pipes so that the projected area is increased only by the plate thickness in the wind direction, and the root of the punched-out notch fin is fixed to the pipe. It has in the center position of the caulking part for and for the caulking part adjacent to the caulking part. Further, a plurality of punched-out notch fins are provided on the plate alone, and the punched-out notch fins are arranged in a staggered arrangement. FIG. 14 shows an embodiment of a front sectional view of the punched-out notch fin alone.
This is shown in FIGS. The punched-out notched fin shown in FIG. 14 shows an embodiment in which fins which are raised from two places are articulated to form an arch shape. FIG. 15 is an embodiment showing a fin having a shape obtained by cutting the central portion of the embodiment shown in FIG. 16 shows an embodiment in which the punching notch fins of the embodiment shown in FIG. 15 have the same upper bending direction. The feature of any fin shape is that it has an approximately parallel surface having an angle of 0 ° to 45 ° with the heat radiating plate by bending after rising from the heat radiating plate.

With such a structure, the cooling air flowing along the plate surface is divided by the punched notch fins. That is, since the velocity boundary layer of the cooling air is divided, the temperature boundary layer is divided, and the heat transfer performance can be improved. Moreover, since the shortest length of the punched hole is 4 mm or more, it is difficult for dust to adhere, and there is almost no blockage due to dust, so that heat transfer performance hardly deteriorates with time.

FIG. 17 shows an embodiment in which the punched out notch fins in the embodiment shown in FIG. 13 are made larger on the leeward side than on the leeward side. 4 here
-A indicates a windward punched-out cutout fin, 4-b indicates a leeward punched-out cutout fin, and in this embodiment, the windward-side punched-out cutout fin of 4-a is four.
An example is shown in which the width is larger than that of the punched-out notched fins of -b, and the width is gradually reduced toward the leeward side. FIG. 1 shows an embodiment in which the number of punched-out notch fins in the embodiment shown in FIG. 13 is larger on the leeward side than on the leeward side.

With this structure, the number of holes such as fins is smaller on the windward side than on the leeward side, and the upstream side becomes the downstream side due to foreign matters such as dust carried with the cooling wind. On the other hand, since it is not blocked first, even if the heat radiation heat exchanger is clogged with dust or the like, it is possible to reduce the degree to which the heat transfer performance changes with time.

FIG. 2 shows an embodiment in which two or more heat radiating heat exchangers shown in FIG. 1, FIG. 13 or FIG. 17 are used per refrigerator, and FIG. 18 is used. A cross-sectional view of the heat dissipation heat exchanger shown in FIG. 2 installed in the refrigerator main body is shown by arrows along with the flow of cooling air.
FIG. 19 shows a cross-sectional view of the heat dissipation heat exchanger shown in FIG. 2 installed in a refrigerator body together with a velocity boundary layer.
In the embodiment shown in FIG. 2, when stacking two or more sheets, the heat radiation plates 1 face each other, the pipes 2 contacting the plates are arranged on the outer sides facing each other, and the punched notch fins 4 are placed on the inner sides facing each other. I'm starting up.

The effect of this structure will be described with reference to FIG. 18. The cooling air that has flowed from the windward side flows along the plates between the plates that are at a high temperature due to the radiation of the plates, and It hits a fin parallel to the plate raised inside and flows out of the plate from the hole created by the punched notch fin or the hole 21 created by the caulking notch. Also, the air flowing outside the plate hits the pipe and flows vertically through the holes 21 formed by the caulking notch pieces or the holes created by the punched notch fins, resulting in cooling inside and outside the plate. Wind moves in and out. Moderate air turbulence due to such a breathing effect is induced more than in the embodiment shown in FIG. 8, and heat transfer performance can be improved.

Further, as shown in FIG. 19, the cooling air flowing along the plate surface is divided by the punched notch fins. That is, since the velocity boundary layer of the cooling air is divided, the temperature boundary layer is divided, and the heat transfer performance can be further improved.

The minimum length between the plates and the holes formed by the caulking notch pieces and the holes formed by the punched notch fins is 4
Since it is set to be mm or more, it is difficult for dust to adhere, and there is almost no blockage due to dust, so that heat transfer performance hardly deteriorates with time.

FIG. 20 shows a wire capacitor (a wire capacitor in FIG. 20) and two heat radiating heat exchangers of the embodiment shown in FIG. 4, which are superposed as shown in the embodiment of FIG. 7 (in FIG. 20). (Finless plate type radiator) Two heat radiating heat exchangers of the embodiment shown in FIG. 13, which are stacked as shown in the embodiment of FIG. 2 (fin type plate radiator in FIG. 20) 3 It is a graph of the result of actually measuring the relationship between the front wind speed of various types and the air-side heat transfer coefficient. As can be seen from this graph, in the actual wind speed range, the plate type radiator with fins can improve the performance by 30% to 40% by using the plate type radiator with fins. In addition, it can be seen that there is not much difference in performance between the finned plate radiator and the wire capacitor in the actual wind speed range.

The heat radiating heat exchanger according to the present invention described above does not have a large initial performance difference as compared with the wire capacitor.
Further, it is possible to provide a heat radiating heat exchanger for a refrigerator which can be manufactured at low cost with less dust adhesion and less performance deterioration over time.

[0039]

As described above, according to the present invention, the radiator mounted on the outer surface of the refrigerator is integrated in the machine room portion, and in the refrigerator adopting the heat dissipation method by forced convection, the wire capacitor type with forced convection is used. When cooling the heat radiating heat exchanger and the like, unless a filter or the like is attached to the suction port, there is a problem that dust such as dust adheres to the radiator itself and the heat transfer performance deteriorates with time. Further, even when a filter or the like is attached, maintenance of the filter or the like is required, which makes the usability very poor. In addition, since the pipe and wire are fixed by welding, the wire condenser type heat radiating heat exchanger has a problem in that there are many welding points and the manufacturing cost is high.

The present invention solves the above-mentioned problems of the prior art, and provides a heat radiating heat exchanger for a refrigerator which can be produced at a low cost with less dust adhesion, less performance deterioration over time.

[Brief description of drawings]

FIG. 1 is a top view of a main part of a heat dissipation heat exchanger of an embodiment.

FIG. 2 is a front view of the main parts of the heat dissipation heat exchanger of the embodiment.

FIG. 3 is a side view showing a state in which the heat dissipation heat exchanger of the embodiment is incorporated in a refrigerator.

FIG. 4 is a top view and a front view of a main part of a heat dissipation heat exchanger of an embodiment.

FIG. 5 is a side view of a main portion of a caulking portion of the heat dissipation heat exchanger of the embodiment.

FIG. 6 is a side view of the essential parts of the heat dissipation heat exchanger of the embodiment.

FIG. 7 is a side view of the essential parts of the heat dissipation heat exchanger of the embodiment.

FIG. 8 is a side view of a main part of the heat dissipation heat exchanger of the embodiment.

FIG. 9 is a top view of the essential parts of the heat dissipation heat exchanger of the embodiment.

FIG. 10 is a top view and a front view of the essential parts of the heat dissipation heat exchanger of the embodiment.

FIG. 11 is a perspective view of a main part of the heat dissipation heat exchanger of the embodiment.

FIG. 12 is a perspective view of a main part of a heat dissipation heat exchanger according to an embodiment.

13A and 13B are a top view and a front view of a main part of the heat dissipation heat exchanger of the embodiment.

FIG. 14 is a cross-sectional view of the essential parts of the heat dissipation heat exchanger of the embodiment.

FIG. 15 is a cross-sectional view of the essential parts of the heat dissipation heat exchanger of the embodiment.

FIG. 16 is a cross-sectional view of the essential parts of the heat dissipation heat exchanger of the embodiment.

FIG. 17 is a top view of the essential parts of the heat dissipation heat exchanger of the embodiment.

FIG. 18 is a side view of the essential parts of the heat dissipation heat exchanger of the embodiment.

FIG. 19 is a side view of the essential parts of the heat dissipation heat exchanger of the embodiment.

FIG. 20 is a graph showing a result of actual performance measurement of the example.

FIG. 21 is a perspective view of essential parts of a conventional refrigerator.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Heat dissipation plate, 2 ... Refrigerant meandering pipe, 3 ... Caulking notch piece, 4 ... Punching-out notch fin, 4-a ... Windward-side punching-out notch fin, 4-b ... Downwind-side punching-out notch fin, 5 ... Flange, 6 ... Machine room cover, 7
... Heat-radiating heat exchanger, 8 ... Evaporating dish, 9 ... Base, 10 ... Fan, 11 ... Fan cover, 12 ... Machine room, 13 ... Suction grill, 14 ... Wastewater evaporating condenser, 15 ... Compressor,
16 ... Fan motor, 17 ... Machine room back cover, 18 ...
Suction duct, 19 ... Refrigerator body, 20 Refrigerator bottom plate, 21
Notch holes for caulking, 22 ... Drainage evaporation tray upper surface, 23 ... Heat exchanger upper structure lower surface, 24 ... Cooling air flow, 25 ... Half-fold plate cutting section, 26 ... Velocity boundary layer, 27 ... Wire condenser , 28 ... Cooling air discharge port, 29 ... Suction port.

Claims (11)

[Claims] 1. A refrigerator having at least a drainage evaporation dish, a drainage evaporation radiator, a forced cooling fan, etc. in a machine room formed at the bottom of the refrigerator, wherein the drainage evaporation dish is provided above the drainage evaporation dish. A heat radiating heat exchanger for a refrigerator, characterized in that a plate condenser is disposed such that a surface thereof forms a part of a duct, and the plate condenser is cooled by the forced cooling blower. 2. A heat dissipating heat exchanger of a refrigerator in which a pipe bent in a meandering shape is attached to a thin metal plate by caulking so that most of the pipe is substantially in contact with the thin metal plate. 2. The refrigerator according to claim 1, wherein the shortest length of the hole formed by the caulking notch piece is 4 mm or more, and the bent portion of the meandering pipe is located in the thin metal plate. A heat exchanger for heat dissipation. 3. The heat dissipation heat exchanger for a refrigerator according to claim 2, wherein when two or more refrigerators are stacked and used per one refrigerator, the plates are stacked with a space of at least 4 mm. A heat exchanger for radiating heat from a refrigerator, characterized in that a pipe that comes into contact with the heat exchanger is arranged outside each other. 4. The heat radiating heat exchanger for a refrigerator according to claim 3, wherein when two or more refrigerators are stacked and used per one refrigerator, the end faces on the windward side during normal use are vertically displaced. A heat exchanger for radiating heat in a refrigerator, which is characterized in that 5. The heat radiating heat exchanger according to claim 2, 3 or 4, wherein a cut is made on the entire surface at an appropriate position of the plate so as to cut the plate in a direction parallel to the pipe. A heat exchanger for radiating heat of a refrigerator, which is manufactured by bending a part in a direction in which a pipe is not arranged. 6. The heat radiating heat exchanger according to claim 2, 3, 4 or 5, wherein the pipes are arranged in a flange shape at both plate ends in a direction perpendicular to the meandering direction of the pipes. A heat radiating heat exchanger for a refrigerator, characterized in that when the two heat radiating heat exchangers are stacked on one side of the refrigerator so that the heat radiating heat exchangers are bent to the non-side, the flanges are fitted so as to fit or butt against each other. 7. The heat radiating heat exchanger according to claim 1 or 2, wherein punched-out notched fins having holes of at least 4 mm or more are provided at appropriate positions of the plate. A heat exchanger for radiating heat from a refrigerator. 8. The heat radiating heat exchanger for a refrigerator according to claim 2 or 7, wherein the punched out notched fins are arranged between the pipes so that the projected area is increased only by the plate thickness in the wind direction. And a caulking part for fixing the pipe and a caulking part for fixing the root part of the punched-out notch fin, which has a substantially parallel surface with the plate surface at an angle of 0 ° to 45 °. A heat radiating heat exchanger for a refrigerator, characterized in that it is provided at the center position of the caulking part adjacent to the. 9. The heat radiating heat exchanger according to claim 2 or 7, wherein the number of punched-out notch fins is
A heat radiating heat exchanger for a refrigerator, characterized in that the number on the leeward side is gradually increased with respect to the leeward side. 10. The heat radiating heat exchanger for a refrigerator according to claim 2 or 7, wherein the size of the punched out notch fins is gradually increased on the windward side with respect to the leeward side. A heat exchanger for radiating heat from a refrigerator. 11. The heat radiating heat exchanger of the refrigerator according to claim 7, wherein when two or more refrigerators are stacked and used per one refrigerator, punched-out notched fins are raised inside the plates facing each other. A heat exchanger for radiating heat from a refrigerator, which is characterized in that