CN216770297U - Spiral heat exchanger and air flue supporting piece thereof - Google Patents

Abstract

The application relates to a spiral heat exchanger and an air passage support thereof, wherein the spiral heat exchanger comprises a liquid-running winding belt spirally surrounding the periphery of a left axis and a right axis and internally provided with liquid-running spaces, the liquid-running winding belts of any two adjacent rings are separated by a certain distance, thereby forming a left-right through air channel, an air channel supporting piece supported between the liquid-carrying winding tapes of two adjacent rings is arranged in the air channel, the air duct support comprises a helically corrugated web comprising a plurality of peaks and a plurality of valleys alternately arranged along a helical direction, the wave crest includes an inwardly recessed first solder groove, the wave trough includes an inwardly recessed second solder groove, the wave crest is welded with the liquid-running winding tape through the solder fixedly arranged in the first solder groove, and the wave trough is welded with the liquid-running winding tape through the solder fixedly arranged in the second solder groove. The spiral heat exchanger has a stable flow passage structure and is easy to manufacture.

Description

Spiral heat exchanger and air flue supporting piece thereof

Technical Field

The application relates to the field of heat exchangers, in particular to a spiral heat exchanger and an air flue supporting piece thereof.

Background

Chinese patent No. 202011384539.3 discloses a spiral heat exchanger, which includes a spiral liquid-carrying coiled tape with a liquid-carrying space inside and a gas-carrying channel formed between adjacent coiled tape layers. In order to ensure the structural stability of the air channel, an air channel support piece supported between the adjacent winding coil layers is arranged in the air channel. In particular, the air duct support may be corrugated board, but it is not specifically disclosed as a detail of the corrugated board of the air duct support and whether the corrugated board is fixedly connected with the liquid running tape. If its corrugated sheet only simply presss from both sides and establishes between the adjacent winding circle layer, or the corrugated sheet is relatively poor with the connectivity of walking liquid winding, then the risk that the corrugated sheet that is regarded as air flue support piece breaks away from in the heat exchanger is great.

Disclosure of Invention

The problem that this application was solved is: a spiral heat exchanger and an air passage support thereof are provided, the spiral heat exchanger having a stable air passage structure and being easy to manufacture.

The technical scheme of the application is as follows:

in a first aspect, the present application provides a spiral heat exchanger, which includes a liquid-carrying tape spirally surrounding the peripheries of left and right axes and having a liquid-carrying space inside, the liquid-carrying tapes of any two adjacent layers are separated by a certain distance, thereby forming a left-right through air channel, an air channel supporting piece supported between the liquid-carrying winding tapes of two adjacent circle layers is arranged in the air channel, the airway support comprises a helically corrugated web comprising a plurality of peaks and a plurality of troughs arranged alternately in a helical direction, the wave crest comprising an inwardly recessed first solder groove, the wave trough comprising an inwardly recessed second solder groove, the wave crest is welded with the liquid-flowing tape through the solder fixedly connected in the first solder groove, and the wave trough is welded with the liquid-flowing tape through the solder fixedly connected in the second solder groove.

In an alternative design, the wave crest and the wave trough are both straight-line structures extending from left to right, the first solder groove is a straight-line groove penetrating through the wave crest along the left-right direction, and the second solder groove is a straight-line groove penetrating through the wave trough.

In an optional design, the corrugated tape further comprises a plurality of connecting edges arranged at intervals in sequence along the spiral direction, any adjacent wave crest and wave trough are connected through a corresponding connecting edge, and each connecting edge is located in the same plane with the left and right axes.

In an alternative design, the corrugated web is a unitary structure machined from sheet metal.

In an optional design, the spiral heat exchanger further comprises an inner support ring, and the liquid-removing coiling tape is wound on the periphery of the inner support ring.

In an optional design, 2N +1 separating strips which extend spirally and are sequentially arranged at intervals in the left-right direction are arranged in the liquid-running winding belt, the 2N +1 separating strips divide a liquid-running space in the liquid-running winding belt into 2N +2 sub-runners which are arranged in the left-right direction and are sequentially communicated end to end and extend spirally, wherein N is an integer not less than 1;

in the 2N +2 sub-runners, the left-most sub-runner is provided with a first liquid inlet and outlet, and the right-most sub-runner is provided with a second liquid inlet and outlet;

and a third liquid inlet and outlet communicated with the first liquid inlet and outlet is formed in the left end face of the inner support ring, and a fourth liquid inlet and outlet communicated with the second liquid inlet and outlet is formed in the right end face of the inner support ring.

In an optional design, a separating strip which extends spirally is arranged in the liquid-running winding belt, the separating strip separates a liquid-running space in the liquid-running winding belt into two sub-runners which extend spirally and are arranged along the left and right directions, and the outer ends of the two sub-runners are communicated;

in the two branch channels, the left branch channel is provided with a first liquid inlet and outlet, and the right branch channel is provided with a second liquid inlet and outlet;

and a third liquid inlet and outlet communicated with the first liquid inlet and outlet is formed in the left end face of the inner support ring, a fourth liquid inlet and outlet communicated with the second liquid inlet and outlet is formed in the right end face of the inner support ring, and the third liquid inlet and outlet and the fourth liquid inlet and outlet are oppositely arranged in the left-right direction.

In a second aspect, the present application provides an air channel support for a spiral heat exchanger, for supporting an air flow channel of the spiral heat exchanger, the air channel support comprises a corrugated tape adapted to be bent into a spiral shape, the corrugated tape comprises a plurality of wave crests and a plurality of wave troughs alternately arranged along a spiral direction, the wave crests comprise first solder grooves which are inwardly recessed and used for arranging solder, and the wave troughs comprise second solder grooves which are inwardly recessed and used for arranging solder.

In an alternative design, the wave crest and the wave trough are both straight-line structures extending from left to right, the first solder groove is a straight-line groove penetrating through the wave crest along the left-right direction, and the second solder groove is a straight-line groove penetrating through the wave trough

The application has at least the following beneficial effects:

1. this application has all set up the solder groove of indent on the crest and the trough of the flute winding as air flue support piece, can arrange the solder in the solder groove when the preparation, then arrange in the welding stove alright through the melting solder of concretion again with the flute winding with walk liquid winding welded fastening, it is particularly convenient.

2. Every connecting edge of the corrugated tape is in the same plane with the left and right axes, and can well bear radial pressure perpendicular to the left and right axes, so that the structural stability of the air flow passage is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description only relate to some embodiments of the present application and are not limiting on the present application.

Fig. 1 is a perspective view of a spiral heat exchanger according to one embodiment of the present application with the airway support removed.

Fig. 2 is a schematic perspective view of fig. 1 viewed from another angle.

Fig. 3 is a left side view schematically illustrating a spiral heat exchanger according to an embodiment of the present invention.

Fig. 4 is a schematic right-view diagram of a spiral heat exchanger according to an embodiment of the present application.

Fig. 5 is a schematic side view of a corrugated tape according to an embodiment of the present invention.

Fig. 6 is a schematic view of the corrugated tape after being unfolded in the first embodiment of the present application.

Fig. 7 is an enlarged schematic view of the X portion in fig. 6.

Fig. 8 is a schematic view of the inside of the fluid-carrying tape after being unfolded according to the first embodiment of the present application, in which solid arrows indicate the flow direction.

Fig. 9 is a schematic cross-sectional view of a fluid-carrying tape according to an embodiment of the present disclosure.

Fig. 10 is a schematic view of an inner support ring and an outer support ring according to an embodiment of the present application.

Fig. 11 is a partial schematic view of a spiral heat exchanger according to a first embodiment of the present application.

Fig. 12 is a schematic view of the fluid-carrying tape of fig. 11 after a portion thereof has been peeled off, and the dotted arrows indicate the flow direction.

Fig. 13 is a schematic view of the fluid-carrying tape of fig. 12 after it has been completely peeled off.

FIG. 14 is a schematic diagram of a cascade of multiple spiral heat exchangers according to one embodiment of the present application.

FIG. 15 is another schematic diagram of a plurality of spiral heat exchangers arranged in series according to one embodiment of the present application.

Fig. 16 is a schematic view of the inside of a second embodiment of the present application after the fluid-carrying tape is unwound, and the solid arrows in the drawing indicate the direction of fluid flow.

Fig. 17 is a perspective view of a spiral heat exchanger in accordance with a third embodiment of the present application with the airway support removed.

Fig. 18 is a schematic left side view of a spiral heat exchanger according to the third embodiment of the present application.

Fig. 19 is a schematic right view of a spiral heat exchanger according to the third embodiment of the present application.

Fig. 20 is a partial schematic view of a spiral heat exchanger according to a third embodiment of the present application.

Fig. 21 is a schematic view of the fluid-carrying tape of fig. 20 after it has been completely peeled away.

FIG. 22 is a schematic view of a plurality of spiral heat exchangers in series according to the third embodiment of the present invention.

Description of reference numerals:

l-left and right axis;

1-liquid-carrying winding belt, 2-air-carrying flow channel, 3-air flue supporting piece, 4-inner supporting ring, 5-outer supporting ring,

101-a separating strip, 101 a-a third solder tank, 102-a shunt channel, 103-a first liquid inlet and outlet, 104-a second liquid inlet and outlet;

301-wave peak, 302-wave valley, 303-connecting edge, 301 a-first solder groove, 302 a-second solder groove;

401-a third liquid inlet and outlet, 402-a fourth liquid inlet and outlet, 403-a helicoid, 404-a fan installation cavity.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the application without any inventive step, are within the scope of protection of the application. It will be understood that some of the technical means of the various embodiments described herein may be replaced or combined with each other without conflict.

In the description of the present application and claims, the terms "first," "second," and the like, if any, are used solely to distinguish one from another as between described objects and not necessarily in any sequential or technical sense. Thus, an object defined as "first," "second," etc. may explicitly or implicitly include one or more of the object. Also, the use of the terms "a" or "an" and the like, do not denote a limitation of quantity, but rather denote the presence of at least one of the two, and "a plurality" denotes no less than two.

In the description of the present application and the claims, the terms "connected," "mounted," "fixed," "housed," and the like are used broadly unless otherwise indicated. For example, "connected" may be a separate connection or may be integrally connected; can be directly connected or indirectly connected through an intermediate medium; may be non-detachably connected or may be detachably connected. For example, "accommodated" does not necessarily mean that the entire body is completely accommodated, and the concept also includes a partial accommodation case in which a part protrudes outward. The specific meaning of the foregoing terms in the present application can be understood by those skilled in the art as appropriate.

In the description of the present application and in the claims, if there is an orientation or positional relationship indicated by the terms "upper", "lower", "horizontal", etc. based on the orientation or positional relationship shown in the drawings, it is only for the convenience of clearly and simply describing the present application, and it is not indicated or implied that the elements referred to must have a specific direction, be constructed and operated in a specific orientation, and these directional terms are relative concepts for the sake of description and clarification and may be changed accordingly according to the change of orientation in which the elements in the drawings are placed. For example, if the device in the figures is turned over, elements described as "below" other elements would then be oriented "above" the other elements.

Embodiments of the present application will now be described with reference to the accompanying drawings.

< example one >

Fig. 1 to 15 show a specific embodiment of the spiral heat exchanger of the present application, which includes a liquid-carrying tape 1 spirally surrounding the left and right axes L and having a liquid-carrying space inside. The liquid-walking winding tapes 1 of any two adjacent ring layers are separated by a certain distance, so that a left air-walking flow channel 2 and a right air-walking flow channel 2 are formed. An air passage support piece 3 supported between the liquid-walking winding tapes 1 of two adjacent ring layers is arranged in the air-walking flow passage 2, so that the air-walking flow passage 2 is prevented from being blocked due to the fact that the liquid-walking winding tapes 1 of the two adjacent ring layers are attached to each other. The "left-right axis L" means that the axis extends in the left-right direction. The left and right axes L are virtual lines.

In practical application, liquid (such as water) is introduced into the liquid-flowing space in the liquid-flowing winding tape 1, the liquid flows in the liquid-flowing winding tape 1 along a spiral direction, gas (such as air) having a temperature difference with the liquid is introduced into the gas-flowing channel 2, and the gas flows from right to left in the gas-flowing channel 2. The gas flowing in the gas flowing channel 2 and the liquid flowing in the liquid flowing winding tape 1 exchange heat due to the temperature difference, so that the gas or the liquid with the required temperature is obtained.

A key improvement of this embodiment is that the airway support 3 comprises a helically corrugated web. The corrugated tape includes a plurality of crests 301 and troughs 302 alternately arranged in a spiral direction. The wave crest 301 includes a first solder groove 301a recessed inward, and the wave trough 302 includes a second solder groove 302a recessed inward. The wave crest 301 is soldered to the liquid-carrying tape 1 by the solder fixed to the first solder groove 301a, and the wave trough 302 is soldered to the liquid-carrying tape 1 by the solder fixed to the second solder groove 302 a.

In this embodiment, in order to facilitate the production of the corrugated tape, the corrugated tape is formed as a monolithic structure formed by machining a metal sheet, and the wave crest 301 and the wave trough 302 are both linear structures extending in the left-right direction, the first solder groove 301a is a linear groove penetrating the wave crest 301 in the left-right direction, and the second solder groove 302a is a linear groove penetrating the wave trough 302. In the manufacturing process, the originally flat metal sheet may be subjected to a press process to obtain the wave crest 301, the wave trough 302, and the solder groove on the wave crest 301 and the wave trough 302.

In this embodiment, the corrugated tape further includes a plurality of connecting edges 303 arranged at intervals in the spiral direction, and any adjacent wave crest 301 and wave trough 302 are connected by a corresponding one of the connecting edges 303. The corrugated tape serving as the air duct support 3 mainly functions to support and separate the liquid-carrying tape 1 of two adjacent layers, so as to ensure the structural stability of the air-carrying flow passage 2, and thus the corrugated tape should be capable of well bearing the radial pressure perpendicular to the left and right axes L. For this, each connecting edge 303 is in the same plane as the left and right axis L. It should be noted that "each connecting side 303 is in the same plane as the left and right axes L" means that the left and right axes L are in the same plane as any one of the connecting sides 303, for example, the left and right axes L are in a first plane with one of the connecting sides 303, and the left and right axes L are in a second plane with the other connecting side 303, and do not mean that all the connecting sides 303 are in the same plane, as can be understood with reference to fig. 1 to 4.

In order to better support the liquid-carrying winding 1 and prevent the innermost ring of the liquid-carrying winding 1 from collapsing and deforming because of no radial support, the heat exchanger of the embodiment is further provided with an inner support ring 4, and the liquid-carrying winding 1 is wound on the periphery of the inner support ring 4. The left-right axis L is a line passing through the center of the inner support ring 4.

It is known that corrugated members are easily bent in the arrangement direction of the crests 301 and troughs 302 thereof, and have a strong bending resistance in the length extension direction of the crests 301 or the troughs 302. The embodiment skillfully utilizes the structural characteristics of the corrugated piece, and the wave crests 301 and the wave troughs 302 of the corrugated piece are sequentially and alternately arranged along the spiral direction of the air flow channel 2, so that the corrugated piece can be bent and arranged along the spiral direction, the heat exchanger is convenient to process and manufacture, and the bending strength of the main body part of the heat exchanger is improved.

And, the inner hole of the inner support ring 4 itself can be used for installing the fan which drives the air to flow in the air channel 2, especially the body part of the motor in the fan.

Referring to fig. 8 and 9, in order to increase the flow path of the liquid in the liquid-running tape 1 and thus increase the heat exchange time of the liquid, in this embodiment, a partition strip 101 extending in a spiral shape is disposed in the liquid-running tape 1, the partition strip 101 partitions the liquid-running space in the liquid-running tape 1 into two sub-runners 102 extending in a spiral shape, and the two sub-runners 102 are arranged in the left-right direction and are communicated with each other at the ends. Further, of the two branch passages 102, the left branch passage 102 has a first liquid inlet/outlet 103, and the right branch passage 102 has a second liquid inlet/outlet 104. The left end face of the inner support ring 4 is provided with a third liquid inlet and outlet 401 which penetrates the first liquid inlet and outlet 103 and is communicated with the first liquid inlet and outlet 103. A fourth liquid inlet and outlet 402 communicated with the second liquid inlet and outlet 104 is formed on the right end surface of the inner support ring 4 and extends to the second liquid inlet and outlet 104. And a third liquid inlet and outlet 401 located on the left end face of the inner support ring and a fourth liquid inlet and outlet 402 located on the right end face of the inner support ring are oppositely arranged along the left-right direction.

In one application scenario, hot air in the environment passes through the air flow passage 2 of the heat exchanger from the right to the left under the driving of the fan. The low-temperature liquid for cooling flows into the spiral heat exchanger from the third liquid inlet and outlet 401 at the left side of the inner support ring 4, and flows into the branch passage 102 at the left side through the first liquid inlet and outlet 103. The liquid in the left side branch channel 102 flows from inside to outside along the length direction (spiral direction) of the branch channel 102 to the end (outermost end) and then enters the right side branch channel 102, then flows from outside to inside along the length direction (spiral direction) of the right side branch channel 102 to the end, enters the inner support ring 4 from the second liquid inlet/outlet 104, and then flows out from the fourth liquid inlet/outlet 402 on the right side of the inner support ring 4.

In the above application scenario, after entering the heat exchanger from the third liquid inlet and outlet 401, the low-temperature liquid flows from inside to outside along the spiral direction, and then flows from outside to inside along the spiral direction, and absorbs the heat of the air in the air flow passage 2 in the process, thereby obtaining the cold air flowing out from the right side of the heat exchanger. It will be appreciated that the temperature of the liquid in the heat exchanger increases progressively along its flow path, and that the temperature difference between the two liquids in the innermost circle is the greatest and the temperature difference between the two liquids in the outermost circle is the least (substantially equal), and that if the fluid web 1 is virtually divided into concentric ring regions, the liquids in each concentric ring region will have substantially equal average temperatures, thereby providing air exiting from each location to the right of the heat exchanger with relatively uniform outlet air temperatures, which is well suited for use in an air conditioning system.

The liquid inlet and the liquid outlet of the liquid flowing space are symmetrically arranged at the left side and the right side of the heat exchanger through the design, so that the spiral heat exchangers with the structures can be conveniently connected in series in sequence according to the mode of a figure 14 in actual application, and the heat exchange strength of fluid is improved.

In another application scenario, people can also connect a plurality of spiral heat exchangers with the above structure in series in sequence by means of pipelines according to the mode of fig. 15, and utilize each spiral heat exchanger to respectively exchange heat with air in different areas so as to obtain cold air or hot air in a plurality of areas.

By "inlet and outlet" is meant that the port can be used as a liquid inlet or a liquid outlet.

Referring to fig. 9, the dividing bar 101 is provided with a third solder groove 101a recessed inwards, and the dividing bar 101 is soldered to the body structure of the liquid-carrying tape 1 by the solder fixed in the third solder groove 101 a.

Referring to fig. 10 in combination with fig. 3 and 4, in order to better support the liquid-pervious belt 1 so that the innermost ring of the liquid-pervious belt 1 can smoothly wind outward without significant bending deformation, the outer circumferential surface of the inner support ring 4 includes a spiral surface 403 (i.e., at least a portion of the outer circumferential surface of the inner support ring 4 is the spiral surface 403), and the innermost ring of the liquid-pervious belt 1 is attached to the spiral surface 403. The helicoid 403 is a spirally extending surface, and in fig. 1, the helicoid 403 is gradually distant from the left and right axes L in a clockwise direction around the left and right axes L.

Further, the third liquid inlet/outlet port 401 and the fourth liquid inlet/outlet port 402 both penetrate the spiral surface 403.

Referring to fig. 10 in conjunction with fig. 1 to 4, in order to better protect the spiral heat exchanger, especially the outer ring of the spiral heat exchanger, the present embodiment further includes an outer support ring 5, and the outer support ring 5 is sleeved on the periphery of the spiral tape and is fixedly connected to the outer ring of the spiral tape.

In addition, this embodiment also provides a method for manufacturing the spiral heat exchanger, which mainly includes:

s101, providing a liquid running belt with a liquid running space inside, and providing corrugated belts with wave crests 301 and wave troughs 302 both provided with solder grooves.

S102, arranging solder in a solder groove of the corrugated belt.

S103, the liquid-moving belt and the corrugated belt are attached together and spirally wound on the periphery of the inner support ring 4, and then the inner support ring is placed into a welding furnace, and the spiral corrugated belt and the liquid-moving belt are welded and fixed in the welding furnace by welding flux.

< example two >

The spiral heat exchanger of the second embodiment has basically the same structure as the spiral heat exchanger of the first embodiment, and can be understood by referring to the description of the first embodiment. Hereinafter, the differences between the present embodiment and the first embodiment will be described with emphasis.

Referring to fig. 16, in the present embodiment, three spirally extending dividing strips 101 are disposed in the liquid-moving tape 1, the three spirally extending dividing strips are sequentially arranged at intervals in the left-right direction, the three dividing strips 101 divide the liquid-moving space in the liquid-moving tape 1 into four spirally extending sub-runners 102, and the four sub-runners 102 are sequentially arranged in the left-right direction and are sequentially connected end to end. Among the four branch channels 102, a first liquid inlet/outlet 103 communicating with a third liquid inlet/outlet 401 is specifically disposed in the leftmost branch channel 102, and a second liquid inlet/outlet 104 communicating with a fourth liquid inlet/outlet 402 is specifically disposed in the rightmost branch channel 102.

In an application scenario, the liquid flows into the spiral heat exchanger from the third liquid inlet and outlet port 401 of the inner support ring 4, and flows into the leftmost sub-runner 102 through the first liquid inlet and outlet port 103. The liquid in the leftmost sub-channel 102 flows from inside to outside along the length direction (spiral direction) of the sub-channel 102 to the end (outermost end) thereof and then enters the second sub-channel 102, then flows from outside to inside along the length direction (spiral direction) of the second sub-channel 102 to the end (innermost end) thereof and then enters the third sub-channel 102, then flows from inside to outside along the length direction (spiral direction) of the third sub-channel 102 to the end (innermost end) thereof and then enters the rightmost sub-channel 102 of the fourth sub-channel 102, and then flows from outside to inside along the length direction (spiral direction) of the rightmost sub-channel 102 to the end thereof, and then enters the inner support ring 4 from the second liquid inlet/outlet 104 and flows out from the fourth liquid inlet/outlet 402 of the inner support ring 4.

In another embodiment, five separating bars 101 are arranged in the liquid-moving tape 1, the five separating bars 101 separate the liquid-moving space in the liquid-moving tape 1 into six branch runners 102, the first liquid inlet and outlet 103 is specifically arranged on the leftmost branch runner 102, and the second liquid inlet and outlet 104 is specifically arranged on the rightmost branch runner 102.

It can be understood that the number of the division bars 101 can be increased to obtain more sub-runners 102, so as to increase the heat exchange stroke and time of the heat exchange liquid in the liquid-carrying winding tape 1 and improve the heat exchange strength. However, in order to allow both the inflow and the outflow of the liquid to be arranged on the inner support ring 4, the number of separating webs 101 is preferably an odd number, correspondingly an even number of runners 102 being obtained.

< example three >

Fig. 17 to 22 show a third embodiment of the spiral heat exchanger of the present application, which has substantially the same structure as the spiral heat exchanger of the first embodiment, and can be understood by referring to the description of the first embodiment. Hereinafter, the differences between the present embodiment and the first embodiment will be described with emphasis.

In this embodiment, the third liquid inlet and outlet 401 and the fourth liquid inlet and outlet 402 both penetrate through to the left end surface of the inner support ring 4. The advantages of such a design are: it is possible to connect several spiral heat exchangers in series in the manner of fig. 22 by means of liquid feed lines, all of which are "hidden" on the same side of the respective spiral heat exchanger.

The above are exemplary embodiments of the present application only, and are not intended to limit the scope of the present application, which is defined by the appended claims.

Claims (9)

1. The utility model provides a spiral heat exchanger, includes that the heliciform surrounds in the axis periphery about, and the inside liquid winding that walks that has the liquid space, and the liquid winding that walks of two arbitrary adjacent circles layers separates the certain distance to the air flow channel that walks that link up about forming, it is provided with the air flue support piece that supports between the liquid winding that walks of two adjacent circles layers in the air flow channel to walk, a serial communication port, air flue support piece includes heliciform flute winding, the flute winding includes along a plurality of crests and a plurality of trough of helical direction alternate arrangement, the crest includes inside sunken first solder groove, the trough includes inside sunken second solder groove, the crest through concretize in solder in the first solder groove with walk liquid winding welding, the trough through concretize in solder in the second solder groove with walk liquid winding welding.

2. A spiral heat exchanger according to claim 1, wherein the crest and the trough are each a straight line structure extending right and left, the first solder groove is a straight line groove penetrating the crest in the right and left direction, and the second solder groove is a straight line groove penetrating the trough.

3. A spiral heat exchanger according to claim 1, wherein the corrugated tape further includes a plurality of connecting edges arranged at intervals in the spiral direction, any adjacent wave crest and wave trough are connected by a corresponding one of the connecting edges, and each connecting edge is in the same plane with the left and right axes.

4. A spiral heat exchanger according to claim 1, wherein the corrugated tape is a unitary structure machined from sheet metal.

5. A spiral heat exchanger according to claim 1, further comprising an inner support ring, the coil being wound around the periphery of the inner support ring.

6. A spiral heat exchanger according to claim 5,

2N +1 separating strips which extend spirally and are sequentially arranged at intervals in the left-right direction are arranged in the liquid-running winding belt, the 2N +1 separating strips divide a liquid-running space in the liquid-running winding belt into 2N +2 sub-runners which are arranged in the left-right direction and are sequentially communicated end to end and extend spirally, wherein N is an integer not less than 1;

in the 2N +2 sub-runners, the left-most sub-runner is provided with a first liquid inlet and outlet, and the right-most sub-runner is provided with a second liquid inlet and outlet;

and a third liquid inlet and outlet communicated with the first liquid inlet and outlet is formed in the left end face of the inner support ring, a fourth liquid inlet and outlet communicated with the second liquid inlet and outlet is formed in the right end face of the inner support ring, and the third liquid inlet and outlet and the fourth liquid inlet and outlet are oppositely arranged in the left-right direction.

7. A spiral heat exchanger according to claim 5,

a spirally extending separation strip is arranged in the liquid-running winding belt, the separation strip divides a liquid-running space in the liquid-running winding belt into two spirally extending sub-runners which are arranged along the left and right directions, and the outer ends of the two sub-runners are communicated;

in the two branch channels, the left branch channel is provided with a first liquid inlet and outlet, and the right branch channel is provided with a second liquid inlet and outlet;

and a third liquid inlet and outlet communicated with the first liquid inlet and outlet is formed in the left end face of the inner support ring, and a fourth liquid inlet and outlet communicated with the second liquid inlet and outlet is formed in the right end face of the inner support ring.

8. An airway support for supporting an air flow passage of a spiral heat exchanger, the airway support comprising a corrugated web adapted to be bent into a spiral shape, the corrugated web comprising a plurality of peaks and a plurality of troughs arranged alternately in a spiral direction, the peaks comprising inwardly recessed first solder grooves for the placement of solder, the troughs comprising inwardly recessed second solder grooves for the placement of solder.

9. The airway support according to claim 8, wherein the peak and the valley are each a straight line structure extending left and right, the first solder groove is a straight line groove passing through the peak in the left and right direction, and the second solder groove is a straight line groove passing through the valley.

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