JP2020118364A - Evaporator - Google Patents

Abstract

To provide an evaporation capable of preventing frost adhesion while suppressing reduction of a heat exchange amount.SOLUTION: An evaporator 1 includes a refrigerant pipe 10 and a plurality of fin groups 21 to 26 consisting of a plurality of plate fins 31, 32 arranged in parallel and laminated in an air flow direction. In the fin groups 21 to 26, when it is defined that a direction in which a straight pipe section 11 of the refrigerant pipe 10 is penetrated into the plate fins 31, 32 is a width direction and a direction orthogonal to the depth direction and the air flow direction is a width direction, plate fins of at least one of the fin groups 21 to 25 are constituted of a full size fin 31 of which the dimension of the width direction is equal to the dimension of the width direction of the fin group and a small size fin 32 of which the dimension of the width direction is smaller than that of the full size fin 31, and a gap 36 is formed by the small size fin 32.SELECTED DRAWING: Figure 1

Description

The present invention relates to an evaporator in which a plurality of plate fins arranged in parallel have a refrigerant pipe penetrating them.

A refrigeration cycle equipped with a compressor, a condenser and an evaporator is installed in the heat insulating box of the refrigerator. As an evaporator of such a refrigeration cycle, a fin group composed of a plurality of plate fins arranged in parallel is provided at intervals in the air flow direction, and a plurality of fins fixed to the plate fins of each fin group in a penetrating manner. A straight pipe portion and a heat exchange pipe that connects adjacent straight pipe portions and is composed of a bent pipe portion whose number is one less than that of the straight pipe portion are provided, and all the plate fins are straight pipes of the heat exchange pipe. Those located on a plane parallel to the direction perpendicular to the part are widely used (see Patent Documents 1 and 2).

The heat exchange tube with fins used in the evaporator is manufactured, for example, by the following method. A plurality of plate fins having tube insertion holes are arranged at a predetermined pitch to form one fin group, and the plurality of fin groups are arranged at intervals, and the heat exchange tubes are passed through all the plate fins to form the heat exchange tubes. Expand the tube and fix the plate fins. Then, the finless portion of the heat exchange tube with fins is bent to stack a plurality of fin groups.

As a manufacturing apparatus for the finned heat exchange tube, there is one described in Patent Document 2. The manufacturing apparatus includes a fin set jig in which a plurality of fin support plates are erected at a predetermined pitch on a base, a lower plate and an upper plate for pipe clamps, and notches for fitting pipes are formed in the respective jigs. ing. Then, set the plate fins on the fin setting jig, set the lower plate on the part where there is no fin, pass the heat exchange tube through the tube insertion hole of the plate fin, and support it by the lower plate. The plate fin is fixed to the heat exchange pipe by expanding the pipe by introducing a fluid into the pipe in a state where the upper plate is pressed by the pressing member and the heat exchange pipe is restrained.

Special table 2017-516972 gazette JP 2004-190906 A

This type of evaporator increases the amount of heat exchange by increasing the fin surface area by increasing the fin pitch. However, if the fin pitch is made dense, frost is generated on the surface of the plate fins and it becomes difficult for the air to flow, and further frost is likely to form and the plate fins may be clogged. For this reason, the fin pitch on the windward side is made coarse so that the air flow is not stopped. That is, there is a demand for an evaporator that has both the increased heat exchange amount and the difficulty of forming frost (the ease with which air flows), but has both of them.

Further, in order to manufacture a finned tube for an evaporator having fin groups with different fin pitches by using the manufacturing apparatus in Patent Document 2, a dedicated fin set jig is required for each pitch dimension, and the manufacturing is also performed. Takes time.

In view of the background art described above, the present invention provides an evaporator that suppresses a decrease in heat exchange amount and is less likely to form frost.

That is, the present invention has the configurations described in [1] to [7] below.

[1] A zigzag-shaped refrigerant pipe in which straight pipe portions and curved pipe portions are alternately formed, and a plurality of fin groups formed of a plurality of plate fins arranged in parallel and stacked in the air flow direction are provided. Then, in the evaporator in which the straight pipe portion of the refrigerant pipe penetrates the plate fins of the fin group to integrate the refrigerant pipe and the fin group,
In the fin group, a direction in which a straight pipe portion penetrates a plate fin is a depth direction, a direction orthogonal to the depth direction and a flow direction of air is a width direction,
The plate fins of at least one fin group are composed of full-size fins having a widthwise dimension equal to the widthwise dimension of the fin group, and small-size fins having a widthwise dimension smaller than the full-size fins. An evaporator characterized in that voids are formed by size fins.

[2] The evaporator according to the above item 1, wherein the plate fins in the fin group are arranged at an equal pitch.

[3] The straight pipe portion of the refrigerant pipe penetrates the full size fin at two or more positions in the width direction, and the small size fin penetrates the straight pipe part at a smaller number of places than the full size fin. Evaporator.

[4] The evaporator according to any one of the aforementioned Items 1 to 3, wherein the fin groups adjacent to each other in the air flow direction have small-sized fins arranged at different positions.

[5] The evaporator according to the above item 4, wherein the small-sized fins of the fin group adjacent to each other in the air flow direction are alternately arranged on one end side and the other end side in the width direction.

[6] In the surface on one end side and the surface on the other end side in the width direction of the plurality of stacked fin groups, the surface with less voids is provided with more defrosting pipe heaters than the other surface. The evaporator according to any one of to 5.

[7] A refrigerating apparatus equipped with the evaporator described in any one of the above items 1 to 6.

According to the evaporator described in the above [1], since the full-size fins and the small-size fins are mixed in the fin group, the small-size fin forms a void in a part of the fin group in the width direction. .. Since air easily flows through the voids, frost resistance is improved. Further, since the full-size fins and the small-size fins are densely arranged in the portion having no void, the decrease in heat exchange amount is suppressed.

According to the evaporator described in the above [2], if the plate fins in the fin group are arranged at an equal pitch, voids can be formed, and therefore the production is easy.

According to the evaporator described in the above [3], the size difference between the small size fins can be set to be large by allowing the straight pipe parts to penetrate through the small size fins at locations smaller than the full size fins, and the area of the voids can be increased. Can be large enough.

According to the evaporator described in the above [4], the fins adjacent to each other in the air flow direction have the small-sized fins arranged at different positions, and the fins adjacent to each other have the voids formed at different positions. Flows without interruption.

According to the evaporator described in [5], the small-sized fins of the fin groups that are adjacent to each other in the air flow direction are alternately arranged on one end side and the other end side in the width direction, and Since air gaps are formed alternately on one end side and the other end side, the air flow is particularly good.

In the evaporator described in the above [6], since more pipe heaters for defrosting are attached to the surface having less voids and easily frosted than the other surface, defrosting can be performed efficiently.

The refrigerating apparatus according to the above [7] can obtain the above effects for the evaporator.

It is a perspective view of one embodiment of the evaporator of the present invention. It is a perspective view of the full size fin used for the evaporator of FIG. It is a perspective view of the small size fin used for the evaporator of FIG. It is sectional drawing of the fin group of the evaporator of FIG. It is sectional drawing of the fin group of another evaporator. It is a principal part perspective view of a fin fixing device. It is a principal part sectional drawing of a fin fixing device. FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 7. It is a top view of a tube with fins. It is a principal part perspective view which shows the method of processing from a finned tube to an evaporator. It is sectional drawing of the evaporator provided with the pipe heater.

1 to 4 show an example of the evaporator of the present invention.

The evaporator 1 includes a zigzag-shaped refrigerant pipe 10 in which straight pipe portions 11 and curved pipe portions 12 are alternately formed, and a plurality of plate fins 31 and 32 arranged in parallel, and are laminated in a flow direction of air. It also has six fin groups 21, 22, 23, 24, 25, 26. Since the straight pipe portion 11 of the refrigerant pipe 10 penetrates the fin groups 21 to 26 and the plate fins 31 and 32 are fixed to the straight pipe portions, the refrigerant pipe 10 and the fin groups 21 to 26 are integrated with each other. There is. The evaporator 1 is set so that air flows from the bottom to the top of the drawing (see the arrow in FIG. 1).

In the fin groups 21 to 26, the direction in which the straight pipe portion 11 penetrates the plate fins 31 and 32 is defined as the depth direction, and the direction orthogonal to the depth direction and the air flow direction is defined as the width direction. Further, in the following description, the six-layer fin groups 21 to 26 are the first-stage fin group 21, the second-stage fin group 22,... The sixth-stage fin group in order from the leeward side to the leeward side in the air flow direction. It is referred to as a fin group 26.

Each of the fin groups 21 to 26 has a full-size plate fin (hereinafter referred to as “full-size fin”) 31 in which the widthwise dimension W1 in FIG. 2 is equal to the widthwise dimension of the fin groups 21 to 26, and FIG. The size W2 in the width direction is made up of two types of plate fins having different sizes, that is, a small size plate fin (hereinafter abbreviated as "small size fin") 32 that is ⅔ of the width size W1 of the full size fin 31. .. The full-size fins 31 and the small-size fins 32 have the same fin thickness and size in the air flow direction, that is, height. Further, the full-size fin 31 has three through holes 33 formed in the center in the height direction at intervals in the width direction, and a flange 34 projects from the peripheral edge of these through holes 33. The small-sized fin 32 has two through holes 33 formed in the center in the height direction at intervals in the width direction, and a flange 34 projects from the peripheral edge of these through holes 33. The protrusion heights of the flange 34 of the full-size fin 31 and the flange 34 of the small-size fin 32 are the same, and the fin pitch is set by the protrusion height of the flange 34. Since the through hole 33 is a hole through which the straight pipe portion 11 penetrates, the straight pipe portion 11 penetrates the full size fin 31 at three locations, and the small size fin 32 penetrates the straight pipe portion 11 at two locations.

Each of the six fin groups 21 to 26 has a straight pipe portion 11 penetrating at three locations, adjacent straight pipe portions 11 are connected by a curved pipe portion 12, and the refrigerant pipe 10 communicates from an inlet to an outlet. Further, each fin group 21 to 26 is composed of the above-described full-size fins 31 and small-size fins 32, and the arrangement of the two types of fins differs depending on the step. FIG. 4 is a cross-sectional view taken along the center of the height direction of the fin groups 21 to 26 in each stage, and the lower part of the drawing is shown as one end side in the width direction and the upper part is shown as the other end side. Note that FIG. 4 is a drawing schematically showing the arrangement of the full-size fins 31 and the small-size fins 32, and the flange 34 is not shown. In each fin group 21 to 26, the straight pipe portion 11 penetrates at three places, and one end side straight pipe portion 11a, an intermediate straight pipe portion 11b, and the other end side straight pipe portion 11c are sequentially arranged from the lower side to the upper side of the drawing. To call.

The plate fins of the first-stage, third-stage, and fifth-stage fin groups 21, 23, and 25 are alternately arranged with full-size fins 31 and small-size fins 32. One end side straight pipe part 11a, middle straight pipe part 11b and the other end side straight pipe part 11c penetrate the full size fin 31, and middle size straight pipe part 11b and the other end side straight pipe part 11c penetrate the small size fin 32. Penetrates. The plate fins of the second-stage and fourth-stage fin groups 22 and 24 are also arranged with the full-size fins 31 and the small-size fins 32 alternately. The small-size fins 32 have one end side straight pipe portion 11a and an intermediate straight pipe. The part 11b penetrates. The plate fins of the sixth-stage fin group 26 are composed of only the full-size fins 31, and all the full-size fins 31 are penetrated by the straight pipe part 11a on one end side, the straight pipe part 11b on the middle side, and the straight pipe part 11c on the other end side. ing.

The fin groups 21 to 26 are set by bringing plate fins into contact with the flanges of adjacent plate fins and arranging them. Since the protrusion sizes of the flanges 34 of the full-size fins 31 and the small-size fins 32 are the same, the fin pitch P becomes uniform no matter how two kinds of plate fins having different sizes are arranged. However, in the first to fifth fin groups 21 to 25, the intermediate straight pipe portion 11 b penetrates both the full-size fins 31 and the small-size fins 32, but the small-size fins 32. Does not reach the other end side straight pipe part 11c when it penetrates the one end side straight pipe part 11a, and does not reach the one end side straight pipe part 11a when it penetrates the other end side straight pipe part 11c. In the width direction of the fin groups 21 to 25, a gap 36 is formed in a portion where the small size fin 32 does not reach the straight pipe portions 11a and 11c. Further, since the full-size fins 31 and the small-size fins 32 are alternately arranged in the fin groups 21 to 25, the dimension P1 in the depth direction of the fin groups 21 to 25 of the void 36 is twice the fin pitch P. It is the dimension including the thickness of the plate fin. Further, in the fin groups 21, 23, 25 of the first stage, the third stage, and the fifth stage, the small size fins 32 do not reach the straight pipe portion 11a on one end side, so that the void 36 is formed on one end side. On the other hand, in the second-stage and fourth-stage fin groups 22 and 24, the small-sized fins 32 do not reach the other end side straight pipe portion 11c, so that a gap 36 is formed on the other end side. Further, since the fin group 26 in the sixth stage is all full-size fins 31, no void is formed.

In the evaporator 1, the air easily flows in the gap 36, the frost resistance is improved, and the time required for defrosting can be extended. Further, since the voids 36 are formed only in a part of the fin groups 21 to 25 in the width direction, and the full-size fins 31 and the small-size fins 32 are densely arranged in the portion 35 without the voids 35, A decrease in the exchange amount is suppressed. Since the voids 36 are alternately formed on one end side and the other end side in the width direction of the stacked fin groups 21 to 26, air flows alternately through the voids 36 and the non-voided portions 35. There is no place where the air stays and there is a good flow as a whole. In this way, by forming gaps at different positions in the adjacent fin groups, the air flows without stopping. Particularly, by forming voids alternately on one end side and the other end side in the width direction of the fin group, in other words, by arranging the small size fins alternately on one end side and the other end side in the width direction, the air flow is improved. can do.

As described above, by mixing the plate fins having different sizes in the fin group, a gap is formed in a part in the width direction. The area, number and position of the voids can be changed by the position and number of small size fins.

The number and area of the voids are preferably increased or increased on the windward side where frost formation is likely to occur in order to improve the air flow and enhance the frost resistance. In the evaporator 2 of FIG. 5, voids are alternately formed on one end side and the other end side in the width direction of the fin group, and are large on the windward side and small on the leeward side. That is, the first-stage fin group 41 has four small-sized fins 32 arranged between the full-size fins 31 to form a gap 37a, and the second- and third-stage fin groups 42 and 43 are full-sized. A gap 37b is formed by arranging two small size fins 32 between the fins 31, and the fin groups 44 and 45 in the fourth and fifth steps are one small size fin 32 between the full size fins 31. To form a space 37c, and the fin group 46 in the sixth stage is composed of only the full-size fins 31. The relationship between the depth-direction dimensions P2, P3, P4 and the fin pitch P of the fin group of the three types of voids 37a, 37b, 37c is P2>P3>P4>P.

In the evaporators 1 and 2, since the fin pitch is made constant and the voids are partially provided, the heat exchange amount is less decreased than in the case where the fin pitch is made coarse. By forming the voids 36, 37a, 37b, 37c in a part of the fin groups 21 to 25, 41 to 45 in the width direction, the frost resistance is suppressed while suppressing a decrease in the heat exchange amount due to the roughened fin pitch. Can be improved.

In the evaporators 1 and 2 of the illustrated example, the straight pipe portion 11 is passed through three places of the full-size fin 31, but the number of straight pipe portions passing through the plate fin is not limited in the present invention, and four or more places or It may be two or less. Further, the dimensional difference between the small size fin and the full size fin does not matter. In the small size fins 32 of FIGS. 2 to 5, the number of the through holes 33 is reduced by one from the full size fins 31 to be two, and the width dimension is 2/3 of the full size fins 31, but the through holes 33 are It may be one fin having a width dimension of 1/3. However, the size of the small size fin 32 is preferably 60% to 80% of that of the full size fin 31. Since the voids 36, 37a, 37b, 37c are formed in the region where only the full-size fins 31 exist in the width direction of the fin groups 21-25, 41-45, the width dimension can be reduced without reducing the number of through holes 33. The expansion fin pitch portion can be formed only by doing this. However, since the area of the void cannot be made sufficiently large by reducing the width dimension to that extent, the effect of promoting the flow of air is also small. Therefore, it is desirable to reduce the width of the small size fin by reducing the number of through holes.

Further, the evaporator of the present invention is not limited to having all the fin groups having voids. The formation of voids makes it easier for air to pass through and makes it difficult for frost to form, but on the other hand, the amount of heat exchange decreases, so a fin group with no voids is placed in the leeward direction where frost formation is difficult to prevent reduction in the amount of heat exchange. That is also a preferred embodiment. Furthermore, it is not limited that the plurality of small size fins arranged in one fin group have the same position in the width direction. For example, in the fin group 22 in the second stage of FIG. 4, all the small-sized fins 32 have one end side straight pipe portion 11a and the intermediate straight pipe portion 11b penetrating to one end side in the width direction, but they are brought close to one end side. Small size fins through which the straight pipe portion 11a on one side penetrates and small size fins through which the straight pipe portion 11c on the other end penetrates may be mixed. Further, the full-size fins and the small-size fins can be randomly arranged.

Furthermore, the present invention is not limited to the fin pitches of a plurality of fin groups being equal. It is also possible to mix plate fins having different dimensions and to combine fin pitch density.
[Evaporator manufacturing method]
In the evaporator 1, for example, plate fins are fixed to a straight pipe by using the fin fixing device 3 shown in FIGS. 6 to 8, and then the straight pipe is connected by a curved pipe to produce the finned pipe 100 of FIG. It can be manufactured by bending the finned pipe 100.
(How to fix plate fins)
The fin fixing device 3 shown in FIGS. 6 to 8 includes a fin set jig 60 including a long plate-shaped base 61 and a plurality of parallel fin support plates 62 that are erected on the plate-shaped base 61 at intervals in the longitudinal direction. , A pipe clamp lower plate 64 arranged in the fin set gap 63 between the adjacent fin support plates 62 of the fin set jig 60, and a lower plate 64 arranged between the adjacent fin support plates 62. The pipe clamp upper plate 65 and the plate-shaped pressing member 66 for pressing the upper plate 65 downward are provided.
The plate-shaped base 61 is configured by arranging a plurality of base units 61A in series, and a plurality of fin support plates 62 are erected on each base unit 61A. Three substantially U-shaped notches 62a into which the straight pipes 102 can be fitted are formed at the upper edge of each fin support plate 62 at intervals. Further, three semicircular cutouts 64a, 65a are formed at intervals on the upper edge of the lower plate 64 for pipe clamping and the lower edge of the upper plate 65, respectively, and these cutouts 64a, 65a are formed. Three circular through holes 67 through which the straight pipe 102 can be inserted are formed between the upper and lower plates 64 and 65 at the same pitch as the pitch between the three notches 62 a of the fin support plate 62. The inner diameter of this through hole 67 is larger than the outer diameter of the straight pipe 102 before pipe expansion.

In manufacturing the evaporator 1, three straight pipes 102 for fixing fins, a large number of full size fins 31, a large number of small size fins 32, and two semi-circular connecting members 103 for connecting the straight pipes 103 are prepared. To do.

Of the fin set gaps 63 between all the fin support plates 62 in the fin fixing device 3, the full size fins 31 and the small size fins 31 and the small fins are arranged in the fin set gaps 63 at positions corresponding to the first to fifth stage fin groups 21 to 25. The size fins 32 are arranged in a predetermined order, and the full-size fins 31 are arranged in the fin set gap 65 of the order corresponding to the fin group 26 in the sixth stage. FIG. 6 shows an example in which full size fins 31 and small size fins 32 are alternately arranged. The lower plate 64 is arranged in the fin set gap 63 in the finless portion between the fin groups. Next, the three straight tubes 102 are passed through the through holes 33 of the full-size fins 31 and the small-size fins 32 and are fitted into the notches 64a of the lower plate 64. Next, the upper plate 65 is arranged on the lower plate 64 so that the straight pipes 102 are respectively passed through the three through holes 67 formed between the plates 24 and 25.

Then, in a state where the upper plate 65 is pressed downward by the pressing member 66, the openings at one ends of the three straight tubes 102 are closed and restrained by a metal fitting (not shown), and the openings at the other ends. Introduce a fluid to expand the tube. Due to this expansion, the outer peripheral surface of the straight pipe 102 strongly abuts the through holes 33 of the full-size fins 31 and the small-size fins 32 and the inner surfaces of the flanges 34, and the fins 31 and 32 are fixed to the straight pipe 102.

Next, both ends of the connecting member 103 are joined to the ends of the two straight pipes 102 to form one refrigerant pipe in which the three straight pipes 102 communicate with each other by the two connecting members 103. In the finned tube 100 thus manufactured, one long refrigerant tube is bent at two locations and penetrates each fin group 21 to 26 at three locations (FIG. 9).

Then, as shown in FIG. 10, the finless portion 101 between the fin groups 21 to 26 of the finned tube 100 is bent in a meandering shape so that the six fin groups 21 to 26 are laminated. As a result, the evaporator 1 shown in FIG. 1 is obtained.

The fin setting jig 60 is a jig for arranging plate fins at an equal pitch regardless of the size of the width, and the pitch of the fin support plate 62 corresponds to the fin pitch P. Since the void 36 is formed in a portion where the small fin 32 does not reach the straight pipe 102, the void 36 can be formed by disposing the small fin 32 at a desired position of the fin setting jig 60. Further, the size of the space 36 in the depth direction can be freely expanded according to the number of the small fins 32 continuously arranged. Therefore, the fin set jig 60 is common whether the voids are formed at different positions in the fin group or when the voids having different sizes are formed. The evaporator of the present invention is not limited to the one manufactured by using the fin setting jig.
[Other modes of evaporator]
Install a defrosting heater on the evaporator. The heater can be efficiently defrosted by attaching it to the part with a large amount of frost. Therefore, in the evaporator of the present invention, the defrosting pipe heater is provided on the one end side surface and the other end side surface in the width direction of the plurality of stacked fin groups more on the surface with a larger number of voids than on the other surface. It is desirable to install it. FIG. 11 shows an evaporator 4 having fin groups 71 to 76 in six stages. The fin groups 71, 73, and 75 in the first, third, and fifth stages have a partial void 77 formed on one end side. A space 77 is formed on the other end side of the fin group 72 in the tier, and a space 77 is not formed in the fin groups 74 and 76 of the fourth and sixth tiers. That is, the evaporator 4 has a larger number of voids 77 formed on one end side surface of the fin groups 71 to 76 than on the other end side surface. The defrosting pipe heaters 78 are attached to the fin groups 71 to 76 at two positions on one end side and four positions on the other end side, respectively, in the depth direction.

Further, in the refrigerating apparatus equipped with the evaporator of the present invention, the above-mentioned effects can be obtained.

The evaporator of the present invention can be used in a refrigerator.

1, 2, 4... Evaporator 10... Refrigerant pipe 11... Straight pipe part 11a... One end side straight pipe part 11b... Intermediate straight pipe part 11c... Other end side straight straight pipe part 12... Curved pipe parts 21-26, 411- 46, 71 to 76... Fin group 31... Full size fin (plate fin)
32...Small fins (plate fins)
35... Portions without void 36, 37a, 37b, 37c, 77... Void 78... Pipe heater

Claims (7)

A zigzag-shaped refrigerant pipe in which straight pipe portions and curved pipe portions are alternately formed, and a plurality of fin groups formed of a plurality of plate fins arranged in parallel and laminated in the air flow direction, In an evaporator in which a refrigerant pipe and a fin group are integrated by a straight pipe portion of the refrigerant pipe penetrating a plate fin of the fin group,
In the fin group, a direction in which a straight pipe portion penetrates a plate fin is a depth direction, a direction orthogonal to the depth direction and a flow direction of air is a width direction,
The plate fins of at least one fin group are composed of full-size fins having a widthwise dimension equal to the widthwise dimension of the fin group, and small-size fins having a widthwise dimension smaller than the full-size fins. An evaporator characterized in that voids are formed by size fins. The evaporator according to claim 1, wherein the plate fins in the fin group are arranged at an equal pitch. The evaporator according to claim 1 or 2, wherein the full-size fins penetrate the straight pipe portion of the refrigerant pipe at two or more locations in the width direction, and the small-size fins penetrate the straight pipe portion at fewer locations than the full-size fins. .. The evaporator according to any one of claims 1 to 3, wherein small fins are arranged at different positions in the fin groups adjacent to each other in the air flow direction. The evaporator according to claim 4, wherein the small-sized fins of the fin group that are adjacent to each other in the air flow direction are alternately arranged on one end side and the other end side in the width direction. A surface of one end side and a surface of the other end in the width direction of the plurality of stacked fin groups are provided with more defrosting pipe heaters on the surface with less voids than on the other surface. The evaporator according to any one of 1. A refrigerating apparatus comprising the evaporator according to claim 1.

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