CN109682122A

CN109682122A - Heat exchanger and method for manufacturing the heat exchanger

Info

Publication number: CN109682122A
Application number: CN201811186663.1A
Authority: CN
Inventors: A·福格尔; B·普夫洛姆
Original assignee: BSH Bosch und Siemens Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2017-10-18
Filing date: 2018-10-12
Publication date: 2019-04-26
Also published as: TR201815405A2; DE102017218639A1

Abstract

Heat exchanger (14) for refrigerating appliance has heat exchanger tube (1), and the heat exchanger tube is shaped to helix (3,3 ') between fill nipple (9) and aspiration connection (7).

Description

Heat exchanger and method for manufacturing the heat exchanger

Technical field

A kind of heat exchanger the present invention relates to heat exchanger more particularly in Domestic refrigerator, and be related to A method of for manufacturing such heat exchanger.

Background technique

Tube-plate type heat-exchanger is widely used in evaporator in Domestic refrigerator.In the heat exchanger of this form, Made of aluminum, guidance refrigerant pipe is laid on carrier board.Carrier board is typically mounted on refrigerating appliance internal container On rear wall, so that its planar side sticks on rear wall with heat conduction in large area, and refrigerant pipe is on the opposed side of carrier board It is embedded into the heat-barrier material for surrounding internal container.

Refrigerant pipe mostly from the injection phase of the upper edge of evaporator on the right between edge and left edge oscillatorily to Lower extension, linearly to rise to aspiration connection along side edge therefrom.This arrangement causes uneven on an evaporator Temperature Distribution.Here, the coldest region is located near injection phase；Therefrom downwards, temperature rises.It is risen to from lower edge The tube section of aspiration connection influences in the upper area of evaporator at most in the temperature of small width taken.

In order to realize more uniform temperature distribution on an evaporator, " nested " pipe extension is proposed, wherein refrigerant Guan Qi oscillatorily, partial straight lines extends along the side edge of carrier board part on the path from injection phase to lower edge, And those of linearly extend in section in refrigerant pipe, will be risen to from lower edge the tube section of aspiration connection oscillatorily at Type, to be filled uniformly with the surface of carrier board.In such evaporator, the molding of refrigerant pipe is than routine, non-nested Evaporator it is significantly more bothersome, which end because according in pipe starts to be laid with, it is necessary to by the tube section of rising Between the molding oscillation section for the tube section that oscillation section is linked into downlink, or vice versa, therefore, closing on into At the end of type process, the molding of the refrigerant pipe part that molding part obstruction has not completed also.

Summary of the invention

Task of the invention lies in realizing a kind of has uniform Temperature Distribution however the molding heat in simple and efficient rate ground Exchanger, and provide a kind of method for manufacturing such heat exchanger.

On the one hand, which is solved by following manner: the heat exchanger for refrigerating appliance has fill nipple, draws Connector and the heat exchanger tube extended between the fill nipple and the aspiration connection, the heat exchanger tube are shaped to spiral shell Spin line is shaped to curve, which is extended with the spacing of constant direction of rotation and increase around the starting point from starting point And herein at least one times entirely around the starting point.

If an end of heat exchanger tube is located in the starting point of helix, and another outer end is located at its edge On, then the spacing between most hot and the coldest position is substantially divided equally, this realizes that heat significantly more intense therebetween is handed over It changes.

However particularly advantageously a kind of duplex tube helix line, i.e. by two spirals for forming of sub- helix in starting point connection Line.In such helix, heat exchange between sub- helix and therefore is carried out to distribution on the face of heat exchanger It is again significantly more intense.

The sub- helix is without intersection and mutually nested with identical direction of rotation.First sub- helix is almost whole at it It is placed in the second sub- helix two sides in a length and heat can be exchanged with it.In addition, making to form in helix without intercrossing The subsequent of the cross section of refrigerant pipe becomes easy later.

More particularly to by the molding helix of pipe by initial circular it is subsequent flatten so that heat exchanger tube it is transversal Face size on the direction for be parallel to the plane than perpendicular to bigger on the direction of the plane, and in capable of improving by this method Heat transmitting between portion's container and refrigerant pipe.

If heat exchanger is assemblied on the internal container of refrigerating appliance, helix is typically by the wall limit of internal container Extend in fixed plane.However it firstly, can more simply manufacture as next yet more precisely explained in cone or pyramid The vertex of the helix extended on body, the cone or pyramid is the starting point of helix.

In order to be filled uniformly with the rectangular wall of internal container, preferably helix is by the straight line tube section that is connected in series It is constituted with 90 ° of pipe arcs.

For necessary shape stability, helix should be fixed on carrier board.The carrier board can be heat exchanger Integrated package；In such a situation it is preferred to which the carrier board is made of metal identical with refrigerant pipe, especially aluminium.But it carries Body plate also can be the internal container of refrigerant shell；Refrigerant pipe is also capable of fixing on it, and the reinforcing being disposed between Plate be not absolutely required.

It is become easy to be installed to heat exchanger in the refrigerant circuit of refrigerating appliance, fill nipple and aspiration connection The same edge of rectangular support plate is preferably placed in along upper or be arranged adjacent in its same angle.

In order to pre-cool the refrigerant on the path for leading to evaporator, the capillary of fill nipple is extended to and from absorption The suction pipe that connector issues should contact with each other.

Refrigerating appliance is also subject of the present invention, wherein the heat exchanger assignment of type discussed above is in storage chamber And it surrounds between the insulation material layer of storage chamber.

The task also passes through a kind of for manufacturing heat exchanger, especially manufacturing the side of heat exchanger as described above Method solves, and the method has following step:

A) so that heat exchanger tube is bent to tool, there are two the hairpin forms of the leg in the elongated stretching in the two sides of arc；

B) arc is fixed in the first Workpiece carrier, and the distal section of two legs is fixed on second workpiece and is carried In body；

C) make the side away from the first leg of the side and the second leg towards the second leg of the first leg in the first Workpiece carrier Abutment face on contact；With

D) Workpiece carrier is rotated around pivot center relative to each other, to mould leg in the abutment face.

This method permission expeditiously, rapidly manufactures, because making by each rotation of Workpiece carrier relative to each other Two arcs of refrigerant pipe form simultaneously.

Because molding arc generates at the spacing different from pivot center in two legs, at least one of two legs Leg should longitudinal movement can be maintained in the second tool carrier during step d).

Alternatively, heat exchanger can be also manufactured with following methods, this method has following step:

A) central section of heat exchanger tube is placed in a plane, which reclines in two of the first Workpiece carrier Extend in intermediate space between face；

B) outer sections of heat exchanger tube are fixed at least one second workpiece carrier；

C) first Workpiece carrier is rotated relative to second workpiece carrier around an axis, the axis is transverse to described It central section and is parallel to the plane earth and extends.

Herein, can also make by each rotation of Workpiece carrier relative to each other two arcs of refrigerant pipe simultaneously at Type.

In order to which abutment face needed for the drape forming close to edge for heat exchanger does not interfere in the abutment face Heart drape forming can make the abutment face of the first Workpiece carrier echelon towards the direction of pivot center.

Echeloning in this way, also it is possible that make first heat exchanger close to edge drape forming and Then form central area.Therefore, the task also solves in a kind of method having follow steps:

A) the first section of heat exchanger tube is fixed on the first Workpiece carrier, and by the secondth area of heat exchanger tube Section is fixed on second workpiece carrier；

B) by Workpiece carrier relative to each other around a pivot center rotate, so as to by heat exchanger tube in the first and secondth area The third section extended between section is gradually molded in the abutment face of the first Workpiece carrier,

Third section is sticked on the position of abutment face to echelon towards the direction of the axis.

Detailed description of the invention

Other features and advantages of the present invention are obtained by the explanation of following embodiment referring to appended attached drawing.It illustrates:

The top view of Fig. 1 heat exchanger according to the present invention；

The partial cross section of the heat exchanger of Fig. 2 Fig. 1；

Fig. 3 has the internal container of the refrigerating appliance of heat exchanger according to the present invention；

The three-dimensional view of the first Workpiece carrier of Fig. 4, for manufacturing the heat exchanger of Fig. 1 according to first method；

The side view of the first Workpiece carrier of Fig. 5 Fig. 4 and complementary Workpiece carrier；

The three-dimensional view of the first Workpiece carrier of Fig. 6, for manufacturing the heat exchanger of Fig. 1 according to second method；

The top view of first Workpiece carrier of Fig. 7 a-c in the process of third method；

The top view of first Workpiece carrier of the Fig. 8 in fourth method；

The top view of first Workpiece carrier of Fig. 9 a-b in the process of the 5th method；With

The top view and side view of Figure 10 a, the b Workpiece carrier used in the 6th method.

Specific embodiment

As the embodiment of heat exchanger according to the present invention, Fig. 1 shows usual in Domestic refrigerator for cooling down Refrigerate the top view of the cold wall type evaporator of lattice.The heat exchanger tube 1 of one is placed in bilateral stream helical wire form, rectangle Carrier board 2 on.Correspondingly reciprocal two sub- helixes 3,3 ' are issued from the starting point 0 at 2 middle part of carrier board.

Sub- helix 3,3 ' is made of 90 ° of pipe arcs 4 and straight line tube section 5 respectively.The length of tube section 5 is according to carrier board 2 The relationship of edge length be variable.In the case where shown here, two sub- helixes 3,3 ' are at starting point 0 to have half Perhaps 4a ' starts the arc 4a of diameter r also, other arc 4b or 4b ' are directly connected onto above-mentioned arc；The first of length 2r is straight Spool section 5c (5c ') then arc 4b (4b ')；From there, each other arc 4c, 4d ... respectively then one with 2r Longer tube section 5b, 5c ..., until the final edge with carrier board 2 of the last one straight line tube section of sub- helix 3,3 ' 6 intersections.If the height of carrier board 2 is significantly greater than width, in inner most pipe arc 4a, 4a ' between starting point can connect Enter the vertically-oriented straight line tube section of length l1, and the vertical tube section wrapped extends l1.If the width of carrier board 2 is bright Aobvious to be greater than height, then horizontal tube section 5 can distinguish extending length l, also, in arc 4a, 4b of two sub- helixes 3,3 ' Between access have total length l2 additional horizontal tube section.

One in two intersection points constitutes aspiration connection 7 at edge 6；Heat exchanger tube 1 can be more than at a ground should Extend to intersection point, to constitute suction pipe 8, in the case where heat exchanger is mounted in refrigerating appliance, the suction pipe linking is arrived On compressor.In another point of intersection, heat exchanger tube 1 narrows at injection phase 9, and capillary 10 is passed into the injection phase In.Aspiration connection 7 and injection phase 9 are adjacently positioned with nuzzling on the edge of heat exchanger, to connect with 8 close thermal of suction pipe It contacts to earth the guiding of simplified capillary 10.For this purpose, aspiration connection 7 and injection phase 9 can be arranged in as shown The identical vertical edge of carrier board 2 is along 6；Alternatively, aspiration connection 7 and injection phase 9 can be also placed on adjacent to carrier On the different edges at the same angle of plate.

Fig. 2 shows the partial cross sections along the heat exchanger for passing through Fig. 1 with the plane that II-II is marked in Fig. 1.Initial column The heat exchanger tube 1 of shape is forced on carrier board 2 after the molding of sub- helix 3,3 ' and is crushed herein, so that it is flat Row is greater than the size h perpendicular to carrier board 2 in the size w of carrier board 2.Heat exchanger 1 and carrier board 2 are by such as copper or preferably Good heat conductive metal as aluminium is made.It being contacted at heat exchanger tube 1 and carrier board 2 online 11, wedge 12 extends in the line two sides, The wedge solder of such as metal, the adhesive equipped with thermally conductive additive or suchlike good thermal conductive material are filled out It is full, to increase following areas: can occur on the area efficient between heat exchanger tube 1 and carrier board 2 Heat exchange.

Fig. 3 shows the schematic of the internal container 13 of the refrigerating appliance of the heat exchanger 14 with type shown in Fig. 1 View.Internal container 13 can pass through drawing sheet metal forming made of thermoplastic in known manner.It is such as shown by dashed lines , metallic carrier plate 2 covers the major part of the rear wall 15 of internal container 13.

Alternatively, the function (reinforce heat exchanger and promote heat exchange between sub- helix 3,3 ') of carrier board 2 is very It can extremely be undertaken by internal container 3.Especially when internal container 13 is made itself of good thermal conductive material, such as when it is by plate When engagement, this is meaningful.In order to which heat exchanger tube 1 to be fixed on internal container 13, glue can be applied therebetween Adhesive layer, for example, Fig. 3 dotted line can show which in this case two sides adhesive film edge, the adhesive film applied Be added on rear wall 15, and zigzag shape molding heat exchanger tube 1 be pressed on the adhesive film, to be consolidated It is fixed.

Next the distinct methods of the heat exchanger for manufacturing type discussed above to be explained.

Fig. 4 shows Workpiece carrier 16 with three-dimensional view, and the free end 17 of heat exchanger tube 1 is fixed on the Workpiece carrier On.Workpiece carrier 16 has substrate 18, and the edge that the edge length of the substrate is roughly equivalent to the heat exchanger to be manufactured is long Degree.Slope 19 is formed on substrate 18, rises to vertex 20 to the slope zigzag shape.The side on slope 19 constitutes and reclines Face forms heat exchanger tube 1 in the abutment face, and the side is alternately by linear section 21 and a quarter circle section 22 compositions.Heat exchanger tube 1 is clamped on the nearest section 21a in the edge from substrate 18.

Second workpiece carrier 23 includes stop part 24 and clip 25, and heat exchanger tube 1 is more than that Workpiece carrier 16 is outstanding Section sticks on the stop part.

In the bending step in the stage shown in and then Fig. 4, Workpiece carrier 16 is rotated 90 ° around axis 26, institute It states axis and extends perpendicular to substrate 18 across the midpoint of a quarter circle section 22a.Four points are sticked on by heat exchanger tube 1 One of mode on circular section 22a and linking linear section 21b thereon, the first arc 4 and second for generating heat exchanger it is straight Line section 5.Further bending step around the midpoint across a quarter circle section 22b, c ... generates other arcs 4 With linear section 5, until heat exchanger tube 1 is finally reached vertex 20.Thus the first sub- helix 3 is made.

Fig. 5 is shown ... in a side view the Workpiece carrier 16 with the heat exchanger tube 1 for being coiling to vertex 20 around slope 19.? In the stage, using other Workpiece carrier 27, the slope 19 of the other Workpiece carrier and the slope shape of Workpiece carrier 16 Shape is identical.Fig. 5 shows two Workpiece carriers 16,27 being offset from one another on the direction of axis 26, so as to show by a dotted line Heat exchanger tube 1 is from Workpiece carrier 16 to the transition part of Workpiece carrier 27 out；In fact, the slope 19 of Workpiece carrier 16,27 exists 20 liang of vertex side contacts, so that heat exchanger tube 1 is fixed on the vertex 20 between the side on two slopes 19.Now, two The arrangement of Workpiece carrier 16,27 around pass through Workpiece carrier 27 a quarter circle section 22 midpoint extend axis in phase Anti- side is rotated up, to form the second sub- helix 3 '.

The sub- helix 3,3 ' being achieved in that respectively by its slope 19 shape previously givenly substantially at two it is flat Extend on pyramid, described two flat pyramids rise they with the vertex 20 of Workpiece carrier 16,27 or helix Point contacts on 0 corresponding top.

Then the molding of two sub- helixes 3,3 ' is following step: where pyramid is driven plain, and heat exchanger tube 1 over the whole length by bonding, welding or it is such be adhered to such as carrier board 2 or internal container 13 after On flat pedestal as wall 14.

Fig. 6 shows the modification for the method explained referring to Figure 4 and 5.Used Workpiece carrier 28 is such as in this approach The slope 19 that Workpiece carrier 16 extends with zigzag shape like that.In the stage shown in Fig. 6, on the side on the slope 19 Molded heat exchanger tube 1 is up to vertex 20, so that sub- helix 3 has been made.

After sub- helix 3 is made, gradually bent bolt 29 is placed on slope 18, such as by being carried from workpiece Automatically coming out in body 28 or be manually inserted into Workpiece carrier 28 is to realize in this hole for being prepared.Bent bolt 29 are respectively provided with slot 30, and spacing of the slot setting for being limited with the surface from slope 19 receives heat exchanger tube 1, and curved Bent bolt 29 is remoter from vertex 20, then the spacing on surface of the slot from slope 19 is bigger.Heat exchanger tube 1 is around Fig. 6 Three bent bolts bending in shown bent bolt 29；The arc 4a-d and linear section 5a-c of sub- helix 3 ' have made At.In next bending step, rotate Workpiece carrier 28 around the axis that bent bolt 29e extends is passed through, until heat is handed over Parallel operation pipe 1 meets next bent bolt 29f.Hole 31 or empty, will be assembled with other bent bolt soon.If Time point is assembled with previous in the hole 31, then bent bolt when around bent bolt 29c bending wherein may Have obstruction.

The shape of heat exchanger tube 1 obtained by Workpiece carrier 28 be in the identical shape of the method seen before Shape；Sub- helix 3,3 ' respectively face formula, at vertex 20 contact pyramid on extend.

According to another modification, a quarter circle section 22 on slope 19 can by it is on flat substrate, have towards top The bent bolt substitution for the length that point 20 increases step by step.

Fig. 7 shows the step of following methods, can make two by the method to significantly reduce the bending step of quantity Sub- helix 3,3 ' forms.Heat exchanger tube 1 from right side plate, equipped with bent bolt 29a-c, 29 ' Workpiece carrier It is moved on 32, until (being shown as dotted outline in figure 7 a) in bent bolt is more than to form sub- helix 3,3 ' over there In a sub- helix needed for length tube section.The section is bent first about bent bolt 29a, 29b, to obtain There are two the hairpin forms of the leg 33,33 ' of the elongated stretching, extension 180 ° of 34 two sides of arc for tool.In the perspective view of Fig. 7 a, leg 33, 33 ' horizontally extend and are respectively provided with top and lower section side；The side 37,37 ' of the top of two legs 33,33 ' connects Touch bent bolt 29c or 29a '.

The edge of Workpiece carrier 32 over there, so that two legs 33,33 ' is maintained at the chamber 36,36 ' of other Workpiece carrier 35 In.Chamber 36 ' makes leg 33 ' keep completely not movable；Chamber 36 allows the sliding motion on its longitudinal direction of leg 33, but does not allow cross To movement.

Fig. 7 b shows the result that Workpiece carrier 32 rotates 90 ° around the axis 26 adjacent with bent bolt 29a '.Pass through this Kind rotation generates two 90 ° of arcs 4c, 4a ', and remaining leg 33,33 ' directly extends below two holes 31.Described two After bent bolt 29b ', 29d are loaded onto hole, 90 ° then are continued to rotate around the axis 26 adjacent with bent bolt 29b ', thus Obtain the extension shown in figure 7 c of heat exchanger tube 1, the heat exchanger tube have be molded into bent bolt 29d, Other arc 4d, 4b ' on 29b '.Heat exchanger is made in this way: in a similar way from Workpiece carrier 32 Bent bolt is loaded onto other holes 31 in middle part to edge, and continues to rotate Workpiece carrier 32 step by step.

The Workpiece carrier 16 being shown in FIG. 8 is Workpiece carrier identical with Fig. 4；However, its mode how to install is Different.Heat exchanger tube 1 at a quarter circle section 22h, the g on the closest vertex 20 on slope 19 hairpin it is curved It is bent；The shape of the leg 33,33 ' with 180 ° of arcs 34 and linking thereon generated is the identical shape of Fig. 7 a.On closest vertex Bent bolt 29a ' is accessed in 20 hole.The side 37 ' of leg 33 ' sticks on bent bolt 29a '.The side 37 of leg 33 reclines On the linear section 21g of the side on slope 19.When Workpiece carrier 16 around the axis perpendicular to the plane of delineation in side counterclockwise To when rotating 90 °, leg 33 is abutted on a quarter circle section 22f of side, and leg 33 ' abuts bent bolt 29a ' On, also, generate and arc 4c, 4a of Fig. 7 b ' corresponding two 90 ° of arcs.Because hole 31e does not also include bent bolt, 33 nothing of leg It sticks on linear section 21e with hindering.

Before Workpiece carrier 16 rotates 90 ° again, bent bolt is packed into hole 31b；It can be in a quarter circle area At the bent bolt of section 22e and hole 31h by with arc 4d, 4b of Fig. 7 c ' corresponding other 90 ° of arcs molding.

Bent bolt is continued to rotate and accesses, until on the side that all holes 31 are loaded into and leg 33 sticks on slope Until section 21a.

As in the case of fig. 7 and different from Fig. 6, herein, bent bolt 29 should be respectively arranged to make its slot It flushes and sets with the surface on slope 19, and leg 33 ' is (if the leg is plunderred on the surface on slope 19 when Workpiece carrier 16 is rotated Cross) it enters directly into the slot of bent bolt 29.

Fig. 9 shows another manufacturing method.Workpiece carrier 32 is and Workpiece carrier identical in Fig. 7；As there, Heat exchanger tube 1 is laterally moved on Workpiece carrier 32 with the length of needs, so that its two bending in closest starting point 0 Bolt 29a, 29a ' between pass through.In 32 two sides of Workpiece carrier, heat exchanger tube 1 is made to be maintained at the chamber of second workpiece carrier 35 36, in 36 '；On the longitudinal direction of chamber 36,36 ', heat exchanger tube 1 can resist frictional resistance movement；It cannot be transverse to this Longitudinal direction movement.

When Workpiece carrier 32 is rotated around the axis 26 for passing through the extension of starting point 0 in the counterclockwise direction, heat exchanger tube 1 It is touched first to bent bolt 29a, 29a '.Heat exchanger tube 1 is touching bent bolt 29a, 29a ' point on mark heat exchange The boundary of the central line section 5a of device pipe 1.In the course of rotation, arc 4a, 4a ' is molded into bent bolt 29a, 29a ' on； Meanwhile another pair bent bolt 29b, 29b ' come out from Workpiece carrier 32, to work as arc 4a, 4a ' fully forms and prolong When extending over 90 °, heat exchanger tube 1 encounters bent bolt 29b, 29b as illustrated in Fig. 9 b ' on.Therefore, continuing to turn In dynamic process, in bent bolt 29b, 29b ' on generate arc 4b, 4b ', and make another pair bent bolt 29c, 29c ' it comes out, To form lower a pair of of arc.Repeat the process, until bent bolt 29 from all holes 31 of Workpiece carrier 32 come out and It is wound by heat exchanger tube 1.If this occurs, all bent bolts 29 are pulled back in Workpiece carrier 32, and manufactured Heat exchanger tube 1 is freely located on Workpiece carrier 32.

Figure 10 a shows the incipient stage of another manufacturing method.In the method, described using two Workpiece carriers 38 Two parts of two Workpiece carriers are respectively the Workpiece carrier 16,16 ' of type shown in Fig. 4.The two is shown similar to Fig. 5's Scheme and in the side view of such as Figure 10 b illustratively mutually by tightly placing, so that their abutment face is closest in top respectively The linear section 21h of point 20 is opposed with following spacing, which is just placed on its it for the section 5a of heat exchanger tube 1 enough Between.

The section 40,40 ' of sub- helix will be respectively constituted later, and in section 5a and section 39,39 ', (section is such as Be maintained at as explanation in the chamber 36,36 ' of second workpiece carrier 35) between extend.In order to form sub- helix, make workpiece Carrier 38 is rotated around axis 26, which extends between linear section 21h perpendicular to the plane of Figure 10 a.Meanwhile chamber 36, 36 ' move with being separated from each other on the direction of axis 26, so that section 40,40 ' gradually abuts Workpiece carrier 16,16 ' On the section 21g-a being separated from each other on the direction of axis 26.

As in the method for Fig. 4-6, necessity of hand operation bent bolt during forming sub- helix is saved herein Property, also, as obtained sub- helix there, the sub- helix extends on the direction of pivot center 26 and two Extend on the pyramid surface of a facing each other.When on being mounted on carrier board or in inner container wall, along axis 26 Direction flattens the sub- helix.

Reference signs list

0 starting point

1 heat exchanger tube

2 carrier boards

3,3 ' sub- helix

4a, b ... arc

5a, b ... straight line tube section

6 edges

7 aspiration connections

8 suction pipes

9 injection phases

10 capillaries

11 lines

12 wedges

13 internal containers

14 heat exchangers

15 rear walls

16 Workpiece carriers

17 free ends

18 substrates

19 slopes

20 vertex

21a, b ... linear section

22a, b ... a quarter circle section

23 Workpiece carriers

24 stop parts

25 clips

26 axis

27 Workpiece carriers

28 Workpiece carriers

29a, b ... bent bolt

30 slots

31 holes

32 Workpiece carriers

33,33 ' leg

34 180 ° of arcs

35 Workpiece carriers

36,36 ' chamber

37 legs

38 Workpiece carriers

The section of 39 heat exchanger tubes

The section of 40 heat exchanger tubes

Claims

1. a kind of heat exchanger (14) for refrigerating appliance, with fill nipple (9), aspiration connection (7) and in the note Enter the heat exchanger tube (1) extended between connector (9) and the aspiration connection (7), which is characterized in that make the heat exchanger tube (1) it is shaped to helix.

2. heat exchanger according to claim 1, which is characterized in that the helix by connected on starting point (0) two A sub- helix (3,3 ') composition.

3. heat exchanger according to claim 2, which is characterized in that the sub- helix (3,3 ') is without intersection and with phase Same direction of rotation is mutually nested.

4. heat exchanger according to claim 2 or 3, which is characterized in that the helix is in a plane, on vertex In the cone of the starting point or vertex be the starting point pyramid on extend.

5. heat exchanger according to any one of the preceding claims, which is characterized in that the heat exchanger tube (1) is flat Row is greater than cross sectional dimensions in a direction perpendicular to the plane in the cross sectional dimensions (w) on the direction of the plane (h)。

6. heat exchanger according to any one of the preceding claims, which is characterized in that the helix by connecting in series The straight line tube section (5) and 90 ° of pipe arcs (4) connect is constituted.

7. heat exchanger according to any one of the preceding claims, which is characterized in that the helix is fixed on carrier On plate (2,13).

8. heat exchanger according to claim 7, which is characterized in that the carrier board is that the inside of refrigerating appliance shell holds Device (13).

9. heat exchanger according to claim 7, which is characterized in that the carrier board (2) is metal plate.

10. heat exchanger according to any one of claims 7 to 9, which is characterized in that the carrier board (2) is rectangle, And fill nipple (9) and aspiration connection (7) are arranged in the same edge of the carrier board (2) on (6) or are arranged as adjacent In the same angle of the carrier board (2).

11. heat exchanger according to any one of the preceding claims, which is characterized in that extend to the fill nipple (9) capillary (10) and (suction pipe (8) of 7)s contacts with each other from the aspiration connection.

12. a kind of refrigerating appliance, with heat exchanger according to any one of the preceding claims, the heat exchanger It is arranged in storage chamber and surrounds between the insulation material layer of the storage chamber.

13. a kind of for manufacturing heat exchanger, especially manufacturing heat exchanger according to any one of claim 1 to 12 Method has follow steps:

A) heat exchanger tube (1) is made to bend to hairpin form, there are two the elongated drawings in two sides in arc (34) for the hairpin form tool The leg (33,33 ') stretched；

B) arc (34) is fixed in the first Workpiece carrier (16,32), and by the distal section of two legs (33,33 ') It is fixed in second workpiece carrier (35)；

C) make first leg (33) side (37) towards second leg and second leg (33 ') away from described the The side (37 ') of one leg (33) contacts in the abutment face (21,22) of first Workpiece carrier (16,32)；With

D) Workpiece carrier (32,35) is rotated around pivot center (26) relative to each other, so as to by the leg (33,33 ') It is molded into the abutment face.

14. according to the method for claim 13, in the method, at least one leg in two legs (33,33 ') is in step D) it can be maintained to longitudinal movement in the second workpiece carrier (35) during.

15. a kind of for manufacturing heat exchanger, especially manufacturing heat exchanger according to any one of claim 1 to 12 Method has follow steps:

A) central section of heat exchanger tube (1) is placed in a plane, the plane in the first Workpiece carrier (16,32) two Extend in intermediate space between a abutment face (21h)；

B) outer sections of the heat exchanger tube (1) are fixed at least one second workpiece carrier (35)；

C) by first Workpiece carrier (32) relative to the second workpiece carrier (35) around transverse to the central section And it is parallel to axis (26) rotation that the plane extends.

16. method described in 3,14 or 15 according to claim 1, wherein by the abutment face (21,22) of first Workpiece carrier It echelons towards the direction of the pivot center (26).

17. a kind of for manufacturing heat exchanger, especially manufacturing heat exchanger according to any one of claim 1 to 12 Method has follow steps:

A) the first section (5a) of heat exchanger tube (1) is fixed on the first Workpiece carrier (38), and by the heat exchange The second section (39,39 ') of device pipe (1) is fixed on second workpiece carrier (35)；

Rotate the Workpiece carrier (38,35) around pivot center (26) relative to each other, so as to by the heat exchanger tube (1) the third section (40,40 ') extended between the first section and the second section is gradually molded in first Workpiece carrier (38) in abutment face (21,22), which is characterized in that by the third section (40,40 ') stick on the abutment face (21, 22) on the position to echelon towards the direction of the axis (26).