Spiral heat exchanger and heat exchange device

Abstract

A spiral heat exchanger and heat exchange device, the spiral heat exchanger including a core shaft (1) whose axis extends laterally, and a first liquid-passing coil tape (2) wound spirally around the outer periphery of the core shaft (1) for at least two turns and having a spiral liquid flow path (201) therein, the first liquid-passing coil tapes (2) of adjacent layers being spaced apart at regular intervals to form a spiral first gas-passing flow path (3) penetrating laterally, and the first liquid-passing coil tape (2) has A first liquid inlet / outlet port (4) and a second liquid inlet / outlet port (5) are provided, spaced apart along the longitudinal direction of the first liquid-passing coil tape (2) and communicating with each other via the spiral liquid flow path (201), the first liquid inlet / outlet port (4) being provided at the inner end of the first liquid-passing coil tape (2) in the spiral direction and extending to the left parallel to the axis of the core shaft (1), and the second liquid inlet / outlet port (5) extending to the right parallel to the axis of the core shaft (1).

Description

[Technical field]

[0001] FIELD OF THE DISCLOSURE This application relates to the field of heat exchange, and in particular to spiral heat exchangers and heat exchange devices. [Background technology]

[0002] A heat exchanger is a device that transfers heat from a hot fluid to a cold fluid, and is widely used in daily life and industrial production. In order to require a larger heat exchange area, conventional heat exchangers generally occupy a large area, which means that they have disadvantages such as high requirements for installation space and difficult maintenance. Therefore, in order to ensure a sufficient heat exchange area, it is an urgent task in the industry to find a way to reduce the volume of the heat exchanger.

[0003] The Chinese utility model with the registration publication number 204495135U discloses a new type of spiral plate type reaction heat exchanger, which includes a first thin plate, a second thin plate, an intermediate partition plate and an outer cylinder, the first thin plate and the second thin plate are wound at a distance to form a double spiral cylinder, the intermediate partition plate is connected to the ends of the first thin plate and the second thin plate close to the spiral center respectively, and divides the double spiral cylinder into two spaces that do not interfere with each other, one space is a hot fluid passage (heat medium inlet chamber) for flowing hot fluid, and the other space is a cold fluid passage (heat medium inlet chamber) for flowing cold fluid. The spiral plate type reaction heat exchanger has a hot fluid inlet and a cold fluid outlet near the spiral center of the hot fluid passage and the cold fluid passage, respectively, and a hot fluid outlet and a cold fluid inlet are provided at the outermost periphery of the hot fluid passage and the cold fluid passage, respectively. When heat exchange is performed, the surface areas of the first and second thin plates are both the heat exchange area of ​​the cold fluid, ensuring a sufficient heat exchange area, and the double spiral cylinder can be installed to effectively reduce the volume of the heat exchanger. However, the spiral plate type reaction heat exchanger of the patent document has at least the following disadvantages.

[0004] 1. Large flow resistance: The hot fluid and cold fluid travel a long distance along the spiral winding direction in the hot fluid flow path and cold fluid flow path, respectively. During the process, the fluid flow direction constantly changes, and a large interaction force occurs between the thin plate and the heat exchange fluid. Therefore, the flow resistance of the fluid in the flow path is large, which is not suitable for gas-fluid heat exchange.

[0005] 2. High maintenance frequency. Although the hot fluid flow path is spirally wound, it is actually one space, that is, the hot fluid is transported in a single flow path, and the cold fluid flow path and the cold fluid transport are similar. Take the hot fluid flow path as an example, the single flow path has the following problems: when a blockage occurs at a certain position of the hot fluid flow path, it will affect the transport of hot fluid in the entire hot fluid flow path, and in serious cases, the hot fluid cannot be transported directly, and the heat exchanger cannot operate normally, that is, when a blockage occurs at a position of the hot fluid flow path, the operator needs to perform maintenance on the heat exchanger, and the maintenance frequency is high.

[0006] 3. This heat exchanger has a multi-layer spiral winding structure. In order to achieve sufficient heat exchange and high heat exchange efficiency, the structure usually winds many layers, so the radial size is too large. When the heat exchanger is installed, it is necessary to provide a large radial space for installing the heat exchanger, which means that the concealed installation of the heat exchanger cannot be realized when the radial space is limited.

[0007] 4. The heat exchanger has a single-channel structure, and in actual application, the cold fluid and hot fluid each have only one channel, and the fluid volume is small, so the heat exchange volume is small and the heat exchange capacity (heating or cooling capacity) is insufficient. If the cross-sectional area of ​​the spiral channel is increased to increase the fluid flow rate, the heat exchange area of ​​the heat exchanger under the same size will be greatly reduced, which is like buying a box and giving back the pearls inside. Summary of the Invention [Problem to be solved by the invention]

[0008] The present application proposes a spiral heat exchanger and a heat exchange device to solve at least one of the above problems. [Means for solving the problem]

[0009] The technical solutions of the present application are as follows: In a first aspect, the present application proposes a spiral heat exchanger, A core shaft whose axis extends laterally; a first liquid-passing coil tape wound in a spiral shape around the outer periphery of the core shaft for at least two turns and having a spiral liquid flow path therein; The first liquid passing coil tapes of adjacent layers are spaced apart at a constant interval, thereby forming a spiral first gas passing flow path that penetrates from left to right, and the first liquid passing coil tape is provided with a first liquid inlet / outlet port and a second liquid inlet / outlet port that are arranged at intervals along the longitudinal direction of the first liquid passing coil tape and communicate with each other via the spiral liquid flow path, the first liquid inlet / outlet port is provided at the inner end of the first liquid passing coil tape in the spiral direction and extends to the left parallel to the axis of the core shaft, and the second liquid inlet / outlet port extends to the right parallel to the axis of the core shaft.

[0010] In an alternative design, the second fluid inlet / outlet port is located at the spirally outer end of the first fluid passing coil tape.

[0011] In an alternative design, the spiral heat exchanger further includes a second liquid-permeable coil tape wound in a spiral shape around the outer periphery of the first liquid-permeable coil tape for at least two turns, and the second liquid-permeable coil tapes of adjacent layers are spaced apart from each other at a regular interval, thereby forming a second spiral gas-passing passage penetrating from left to right, and the second liquid-permeable coil tape is provided at both ends of its spiral length with a third liquid inlet / outlet port extending to the left parallel to the axis of the core shaft, and a fourth liquid inlet / outlet port extending to the right parallel to the axis of the core shaft.

[0012] In an alternative design, a liquid flow path partition strip extending left and right is provided within the first liquid passing coil tape, the liquid flow path partition strip partitioning the spiral liquid flow path into two liquid sub-flow paths separated from each other, the first liquid inlet / outlet port and the second liquid inlet / outlet port are provided at both ends of the length of the inner liquid sub-flow path, and a third liquid inlet / outlet port extending to the left parallel to the axis of the core shaft and a fourth liquid inlet / outlet port extending to the right parallel to the axis of the core shaft are provided at both ends of the length of the outer liquid sub-flow path.

[0013] In an alternative design, at least two liquid flow path partition strips extending laterally within the first liquid passing coil tape and spaced apart along the spiral direction of the first liquid passing coil tape are provided, the liquid flow path partition strips partition the spiral liquid flow path into at least three liquid sub-flow paths separated from one another and arranged in sequence along the spiral direction of the first liquid passing coil tape, the first liquid inlet / outlet port and the second liquid inlet / outlet port being provided at both ends of the length of an innermost liquid sub-flow path, and each of the remaining liquid sub-flow paths is provided at both ends of the length of the other liquid sub-flow paths with a third liquid inlet / outlet port extending to the left parallel to the axis of the core shaft and a fourth liquid inlet / outlet port extending to the right parallel to the axis of the core shaft.

[0014] In an alternative design, the third liquid inlet / outlet port is located at an inner end of the liquid sub-channel in a spiral direction and extends to the left parallel to the axis of the core shaft, and the fourth liquid inlet / outlet port is located at an outer end of the liquid sub-channel in a spiral direction and extends to the right parallel to the axis of the core shaft; The first liquid inlet / outlet port and each of the third liquid inlet / outlet ports are distributed linearly along the radial direction of the core shaft, and the second liquid inlet / outlet port and each of the fourth liquid inlet / outlet ports are distributed linearly along the radial direction of the core shaft.

[0015] In a second aspect, the present application proposes a spiral heat exchanger, A core shaft whose axis extends laterally; a first liquid-passing coil tape wound in a spiral shape around the outer periphery of the core shaft for at least two turns and having a spiral liquid flow path therein; The first liquid passing coil tapes of adjacent layers are spaced apart at a constant interval, thereby forming a spiral first gas passing flow passage penetrating from left to right, and a liquid flow passage partition strip extending from left to right is provided within the first liquid passing coil tape, and the liquid flow passage partition strip divides the spiral liquid flow passage into a plurality of liquid sub-flow passages that are arranged in sequence along the spiral direction and are separated from one another, and each of the liquid sub-flow passages is provided at its inner end and outer end in the spiral direction with a first liquid inlet / outlet port and a second liquid inlet / outlet port, which communicate with each other via the liquid sub-flow passage.

[0016] In a third aspect, the present application proposes a spiral heat exchanger, A core shaft whose axis extends laterally; a first liquid passing coil tape wound in a spiral shape around the outer periphery of the core shaft for at least two turns and having a first spiral liquid flow path therein; a second liquid-passing coil tape wound in a spiral shape around the outer periphery of the core shaft for at least two turns and having a second spiral liquid flow path therein; The first liquid passing coil tape of an adjacent layer is spaced at a constant interval thereby forming a first spiral gas passing flow passage penetrating from left to right, and the second liquid passing coil tape of an adjacent layer is spaced at a constant interval thereby forming a second spiral gas passing flow passage penetrating from left to right, the first liquid passing coil tape is provided at its inner end and outer end in the spiral direction with a first liquid inlet / outlet port and a second liquid inlet / outlet port which communicate with each other via the first spiral liquid flow passage, and the second liquid passing coil tape is provided at its inner end and outer end in the spiral direction with a third liquid inlet / outlet port and a fourth liquid inlet / outlet port which communicate with each other via the second spiral liquid flow passage.

[0017] In a fourth aspect, the present application proposes a heat exchanger device, comprising at least two spiral heat exchangers according to the first, second or third aspect, wherein the core shafts of each spiral heat exchanger are coaxially arranged, and the first liquid inlet / outlet ports or the second liquid inlet / outlet ports of adjacent spiral heat exchangers are interconnected.

[0018] In a fifth aspect, the present application proposes a spiral heat exchanger, A core shaft whose axis extends laterally; a first liquid-permeable coil tape wound in a spiral shape around an outer periphery of the core shaft for at least two turns; the spiral coil tapes of the adjacent layers are spaced apart from each other at a constant interval, thereby forming a spiral first gas passage passing through the spiral coil tapes of the adjacent layers in the left-right direction; The first liquid-passing coil tape includes a plurality of tape bodies that spirally circulate around the outside of the core shaft and have a spiral liquid flow path therein, and the multiple tape bodies are arranged parallel to each other and spaced apart in the radial direction of the core shaft, thereby forming a fourth gas-passing flow path that penetrates left and right between adjacent tape bodies.

[0019] In a sixth aspect, the present application proposes a spiral heat exchanger, An inner support; a third liquid-permeable coil tape that is spirally wound around the outer periphery of the inner support and has a liquid-permeable space therein; a winding axis of the third liquid passing coil tape extends along the left-right direction, and the third liquid passing coil tapes of adjacent layers are spaced apart at a constant interval, thereby forming a third gas passing flow path penetrating left-right; the liquid passage space includes 2N+2 sub-flow paths extending in a spiral shape, the 2N+2 sub-flow paths are arranged in a left-right direction and communicate with each other in sequence, N is an integer of 0 or more, Among the 2N+2 sub-channels, the leftmost sub-channel has a first liquid inlet / outlet, and the rightmost sub-channel has a second liquid inlet / outlet; A third liquid inlet / outlet communicating with the first liquid inlet and a fourth liquid inlet / outlet communicating with the second liquid inlet are provided through the inner support.

[0020] In an alternative design, when N=0, a partition strip is provided in the third liquid-permeable coil tape, the partition strip extends in a spiral shape, and the partition strip divides the liquid-permeable space into two sub-channels, and the outer ends of the two sub-channels are connected to each other; or When N≧1, 2N+1 partition strips extending in a spiral shape and arranged at intervals along the left-right direction are installed in the third liquid-passing coil tape, and the 2N+1 partition strips divide the liquid passing space into 2N+2 sub-flow paths arranged along the left-right direction and connected to each other in sequence.

[0021] In an optional design, the first liquid inlet and the second liquid inlet are both located in the innermost ring of the third liquid passing coil tape.

[0022] In a seventh aspect, the present application proposes a spiral heat exchanger, a third liquid passing coil tape that is spirally wound around the outer periphery of the left and right axis and has a liquid passing space therein; an outer support provided on an outer periphery of the third liquid passing coil tape; The third liquid passing coil tape of the adjacent layer is spaced apart at a constant interval, thereby forming a third gas passing flow passage penetrating from left to right, the liquid passage space includes 2N+2 sub-flow paths extending in a spiral shape, the 2N+2 sub-flow paths are arranged in a left-right direction and communicate with each other in sequence, N is an integer of 0 or more, Among the 2N+2 sub-channels, the leftmost sub-channel has a first liquid inlet / outlet, and the rightmost sub-channel has a second liquid inlet / outlet; A third liquid inlet / outlet communicating with the first liquid inlet and a fourth liquid inlet / outlet communicating with the second liquid inlet are provided through the outer support.

[0023] In an alternative design, when N=0, a partition strip is provided in the third liquid-permeable coil tape, the partition strip extends in a spiral shape, and the partition strip divides the liquid-permeable space into two sub-channels, and the outer ends of the two sub-channels are connected to each other; or When N≧1, 2N+1 partition strips extending in a spiral shape and arranged at intervals along the left-right direction are installed in the third liquid-passing coil tape, and the 2N+1 partition strips divide the liquid passing space into 2N+2 sub-flow paths arranged along the left-right direction and connected to each other in sequence.

[0024] In an optional design, the first liquid inlet and the second liquid inlet are both located on the outermost ring of the third liquid passing coil tape.

[0025] In an eighth aspect, the present application proposes a heat exchange device, comprising a plurality of the spiral heat exchangers according to the sixth or seventh aspect, the plurality of spiral heat exchangers being sequentially arranged along the left-right direction, and the third liquid inlet / outlet and the fourth liquid inlet / outlet of adjacent spiral heat exchangers being mutually connected. Effect of the Invention

[0026] The beneficial effects of the present application are as follows: 1. The gas passage of the heat exchanger is a spiral passage penetrating from left to right, has a sufficient heat exchange area, and the gas travels from the left end face of the liquid passing coil tape to the right end face of the liquid passing coil tape, and the gas travels in a direction parallel to the winding axis of the liquid passing coil tape. This reduces the gas flow resistance and makes it easy to clean the gas passage.

[0027] 2. The liquid inlet and outlet ports of some spiral heat exchangers are located on both sides of the axial direction of the heat exchanger, and both extend along the axial direction, so that the liquid inlet and outlet ports are always located within the radial range of the heat exchanger, and the installation space required in the radial direction of the heat exchanger is not increased, and it is also useful for multiple heat exchangers to be arranged in series along the axial direction. When multiple heat exchangers of this structure are arranged in series along the axial direction to combine into a larger heat exchange device, the gas to be exchanged flows along the axial direction of the heat exchange device, and the liquid in each single heat exchanger flows in a spiral in the opposite direction in sequence along the axial arrangement direction, and the device has uniform discharged liquid temperature and exhausted liquid temperature at the same time, which is especially suitable for applications with high requirements for the uniformity of the discharged liquid temperature or exhausted liquid temperature.

[0028] 3. Regarding the spiral heat exchangers of the sixth and seventh aspects of the present application, even if used alone, the liquid for absorbing or releasing heat from the gas flows back and forth in the spiral direction in the spiral heat exchanger, and heat exchange occurs with the target gas passing through the gas passage during the flow process, so that the temperature of the liquid gradually increases or decreases along the flow path. If the liquid-passing coil tape is virtually divided into a number of concentric ring regions, the liquid in each concentric ring region has approximately the same average temperature, so that the target gas flowing out from each position on one side of the spiral heat exchanger has a relatively uniform exhaust temperature. And this design of the present application can increase the flow stroke and heat exchange time of the liquid in the liquid-passing coil tape, and further improve the heat exchange strength of the spiral heat exchanger.

[0029] 4. A plurality of spiral heat exchangers of the present application can be extended in series in the axial direction infinitely, thereby "capturing" as much heat or cold as possible from the heat exchange liquid; furthermore, the temperature of the air exiting the heat exchange device approaches the inlet temperature of the heat exchange liquid infinitely, and the extended heat exchange device does not occupy radial space in the environment.

[0030] 5. Since the heat exchange efficiency of a heat exchanger device consisting of multiple spiral heat exchangers is determined by the total number of spiral heat exchangers, the requirements for the heat exchange efficiency of each spiral heat exchanger itself are reduced, and the number of windings of the coil tape can be appropriately reduced during the manufacture of a single spiral heat exchanger, thereby reducing the radial size. In this way, the tubular heat exchanger formed by multiple heat exchangers connected in series along the axial direction can be installed in a hidden manner in a wall corner, and there is no need to provide a dedicated installation space for it.

[0031] 6. The small number of winding revolutions of the coil tape of the single heat exchanger means that the movement stroke of the spiral fluid in the coil tape is short, and compared with the background art, when clogging occurs, it is less difficult to clean the clogging material along the spiral direction. Even if a single heat exchanger in a heat exchanger device is clogged, the clogged single heat exchanger can be removed and replaced with a normally usable heat exchanger ready for use to continue working, thereby not affecting the normal use of the heat exchanger device.

[0032] 7. In the spiral heat exchanger of the sixth aspect of the present application, the liquid-passing coil tape wound in a spiral shape around the core shaft includes a plurality of spiral tape bodies spaced apart in parallel, and in practical application, liquid can be passed through each tape body independently, allowing a plurality of heat exchange liquid flows to be injected into the spiral heat exchanger, thereby improving the liquid passing amount and heat exchange capacity of the spiral heat exchanger and eliminating the defects of a heat exchanger with a single liquid passage, such as a large flow resistance and a small flow rate. [Brief description of the drawings]

[0033] In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings of the embodiments are briefly introduced below. It should be apparent that the drawings described below are only related to some embodiments of the present application, and are not intended to limit the present application. [Figure 1] FIG. 2 is a structural schematic diagram of the spiral heat exchanger of the first embodiment of the present invention, used to show the left end face. [Diagram 2] FIG. 2 is a structural schematic diagram of the spiral heat exchanger of the first embodiment of the present invention, used to show the right end surface. [Diagram 3] FIG. 2 is a schematic diagram of the left end face of the spiral heat exchanger of Example 1 of the present application with the casing removed. [Figure 4] FIG. 4 is an enlarged view of a portion X1 in FIG. 3, and is used to show the structure of the left end surface of the first liquid passing coil tape. [Diagram 5] FIG. 4 is an enlarged internal view of the portion X1 in FIG. 3, used to show a cross-sectional view of the transverse section of the liquid passing coil. [Figure 6] FIG. 4 is a simplified schematic diagram of FIG. [Figure 7] FIG. 2 is an axial cross-sectional view of the spiral heat exchanger according to the first embodiment of the present invention. [Figure 8] FIG. 2 is a schematic plan view of the heat transfer ribbon of Example 1 of the present application in a fully developed state. [Figure 9] FIG. 1 is a structural schematic diagram of a heat exchange device according to a first embodiment of the present invention. [Figure 10] FIG. 1 is an axial cross-sectional view of a heat exchanger according to a first embodiment of the present invention. [Figure 11] FIG. 11 is a schematic diagram of the left end face of the spiral heat exchanger of Example 2 of the present application with the casing removed. [Figure 12] FIG. 11 is a schematic diagram of the right end face of the spiral heat exchanger of Example 2 of the present application with the casing removed. [Figure 13] FIG. 11 is a schematic diagram of the left end face of the spiral heat exchanger of Example 3 of the present application with the casing removed. [Figure 14] FIG. 11 is a schematic diagram of the right end face of the spiral heat exchanger of Example 3 of the present application with the casing removed. [Figure 15] FIG. 11 is a schematic diagram of the left end face of the spiral heat exchanger of Example 4 of the present application with the casing removed. [Figure 16] FIG. 11 is a schematic diagram of the left end face of the spiral heat exchanger of Example 5 of the present application with the casing removed. [Figure 17] FIG. 13 is a schematic diagram of the left end face of the spiral heat exchanger of Example 6 of the present application with the casing removed. [Figure 18]FIG. 13 is a schematic diagram of the right end face of the spiral heat exchanger of Example 6 of the present application with the casing removed. [Figure 19] FIG. 13 is a schematic diagram of the left end face of the spiral heat exchanger of Example 7 of the present application with the cylindrical casing removed. [Figure 20] FIG. 13 is a schematic diagram of the right end face of the spiral heat exchanger of Example 7 of the present application with the cylindrical casing removed. [Figure 21] FIG. 11 is a schematic diagram of the three-dimensional structure of the spiral heat exchanger of Example 7 of the present application, used to show the left end face. [Figure 22] FIG. 11 is a schematic diagram of the three-dimensional structure of the spiral heat exchanger of Example 7 of the present application, used to show the right end surface. [Diagram 23] FIG. 13 is a schematic cross-sectional view of a combination of multiple spiral heat exchangers according to Example 7 of the present invention in series. [Figure 24] FIG. 13 is a schematic three-dimensional view of the spiral heat exchanger of Example 8 of the present application, with the air passage support member removed. [Diagram 25] FIG. 13 is a schematic left side view of the spiral heat exchanger of Example 8 of the present application. [Figure 26] FIG. 13 is a schematic diagram of the right side of the spiral heat exchanger of Example 8 of the present application. [Figure 27] FIG. 11 is a schematic side view of the corrugated coil tape of Example 8 of the present application. [Figure 28] FIG. 13 is a schematic unfolded three-dimensional view of the corrugated coil tape of Example 8 of the present application. [Figure 29] FIG. 24 is an enlarged schematic view of part X2 in FIG. 23. [Diagram 30] 13 is a schematic diagram of the inside of the liquid-permeable coil tape of Example 8 of the present application with the outer tape body removed, and the solid arrows in the drawing indicate the direction of liquid flow. [Diagram 31] FIG. 13 is a schematic cross-sectional view of a liquid-permeable coil tape according to Example 8 of the present invention. [Diagram 32] FIG. 1 is a schematic diagram of an inner support and an outer support in Example 8 of the present application. [Diagram 33] FIG. 13 is an exploded schematic view of the inner supporting body of Example 8 of the present application. [Diagram 34]FIG. 13 is a schematic diagram of the connection between the switching head and the liquid passing coil tape in Example 8 of the present invention. [Diagram 35] FIG. 35 is a schematic diagram of the liquid passing coil tape of FIG. 34 with the outer tape body peeled off, and the dashed arrow in the drawing indicates the liquid flow direction. [Diagram 36] FIG. 13 is a schematic diagram of multiple spiral heat exchangers arranged in series according to Example 8 of the present application. [Figure 37] FIG. 13 is another schematic diagram of multiple spiral heat exchangers in series according to the eighth embodiment of the present invention. [Figure 38] FIG. 13 is a schematic diagram of the inside of the liquid-permeable coil tape of Example 9 of the present application with the outer tape body removed, and the solid arrows in the drawing indicate the direction of liquid flow. [Figure 39] FIG. 2 is a schematic three-dimensional view of the spiral heat exchanger of Example 10 of the present application, with the air passage support member removed. [Diagram 40] FIG. 23 is a schematic diagram of a switching head according to a tenth embodiment of the present invention. [Diagram 41] FIG. 15 is a schematic diagram of multiple spiral heat exchangers arranged in series according to a tenth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0034] In order to make the objectives, technical solutions and advantages of the present embodiment clearer, the technical solutions of the present embodiment will be clearly and completely described hereinafter with reference to the drawings of the present embodiment.

[0035] In the description of the present application and the claims, when terms such as "first", "second", etc. are present, they are used only to distinguish the objects being described, and do not have any order or technical meaning. Thus, the object to which "first", "second", etc. is limited may explicitly or implicitly include one or more of the object. In addition, the use of similar terms such as "one" or "one" does not indicate a quantity limit, but indicates the presence of at least one, and "plurality" indicates two or more.

[0036] In the description of the specification and claims of this application, the orientations or positional relationships indicated by terms such as "upper", "lower", "horizontal", etc. are based on the orientations or positional relationships shown in the drawings, and do not indicate or suggest that a device or unit necessarily has a specific direction or is constructed and operated in a specific orientation, but are merely intended to facilitate and simplify the description of this application, and therefore should not be understood as limiting this application.

[0037] Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

[0038] Example 1 1 to 8, the spiral heat exchanger of this embodiment mainly comprises a core shaft 1 and a first liquid permeable coil tape 2, the first liquid permeable coil tape 2 is spirally wound around the outer periphery of the core shaft 1, and the first liquid permeable coil tape 2 has 10 windings, thereby forming a spiral liquid flow path 201 having 10 spiral layers in the first liquid permeable coil tape 2. In order to more easily explain the specific structure of the spiral heat exchanger, the longitudinal direction of the core shaft 1 is defined as the left-right direction, that is, the axis of the core shaft 1 extends left-right (extends from left to right).

[0039] In this embodiment, any two adjacent layers of the first liquid permeable coil tapes 2 are spaced apart by a fixed distance, thereby forming a spiral first gas passing passage 3 penetrating from left to right. In order to prevent the first liquid permeable coil tapes 2 of adjacent layers from coming into close contact with each other and causing clogging of the first gas passing passage 3, in this embodiment, an air passage support member is provided in the first gas passing passage 3, sandwiched between the two adjacent layers of the first liquid permeable coil tapes 2.

[0040] The air passage support member is a plurality of ventilation pipes 8 parallel to the core shaft 1, and each ventilation pipe 8 is closely arranged along the spiral direction of the first gas passing flow passage 3. In order to prevent the ventilation pipes 8 from moving, it is preferable to bond and fix the ventilation pipes 8 to the first liquid passing coil tape 2. The ventilation pipes 8 are preferably aluminum pipes, which have excellent heat transfer performance and are easy to manufacture.

[0041] 7, the first liquid-permeable coil tape 2 is provided at its inner end in the spiral direction (i.e., the longitudinal direction) with a first liquid inlet / outlet port 4 extending to the left in parallel with the axis of the core shaft 1, and the first liquid-permeable coil tape 2 is provided at its outer end in the spiral direction with a second liquid inlet / outlet port 5 extending to the right in parallel with the axis of the core shaft 1, and the first liquid inlet / outlet port 4 and the second liquid inlet / outlet port 5 communicate with each other through a spiral liquid flow path 201 in the coil tape. In practical application, the liquid sent to one of the liquid inlet / outlet ports flows to the other liquid inlet / outlet port along the spiral direction of the first liquid-permeable coil tape 2 (which is also the spiral direction of the spiral liquid flow path). At the same time, the gas that needs to be heated or cooled enters the first gas passage 3 from one side in the axial direction of the spiral heat exchanger, flows from left to right or right to left, and then flows out from the other side in the axial direction of the spiral heat exchanger. Because there is a temperature difference between the gas flowing in the first gas passing passage 3 and the liquid flowing in the first liquid passing coil tape 2, heat exchange occurs, and gas or liquid at a desired temperature is obtained.

[0042] However, this heat exchanger has one relatively obvious drawback. Assume that the first liquid inlet / outlet port 4 at the inner end of the first liquid passing coil tape 2 is the liquid inlet, the second liquid inlet / outlet port 5 is the liquid outlet, and the liquid sent to the first liquid passing coil tape is a low-temperature liquid lower than the air temperature in the ventilation pipe. The liquid flows from the inside to the outside in the first liquid passing coil tape 2, and continuously absorbs the heat of the gas in the ventilation pipe during the flow process, so the liquid flow temperature in the first liquid passing coil tape 2 increases from the inside to the outside. After the gas enters the first gas passing passage 3 from one axial side of the spiral heat exchanger, the first liquid passing coil tape that contacts the gas at different positions has a different temperature, that is, the temperature of the first liquid passing coil tape that contacts the gas at the outer periphery is higher than the temperature of the first liquid passing coil tape that contacts the gas at the inner side, which causes the temperature of the gas discharged from the other axial side of the heat exchanger to be non-uniform, and cannot be applied to applications with high requirements for the temperature uniformity of the target gas.

[0043] Based on this, a plurality of spiral heat exchangers of the above structure can be combined and used in the manner shown in Figures 9 and 10 to form a heat exchanger device that can exhaust air at a uniform temperature. In Figures 9 and 10, the core shafts 1 of each spiral heat exchanger of the above structure are coaxially arranged, and the corresponding liquid inlet and outlet ports of any two adjacent spiral heat exchangers are interconnected. For ease of explanation, the four spiral heat exchangers in Figure 10 are referred to as the first heat exchanger, the second heat exchanger, the third heat exchanger and the fourth heat exchanger from left to right, the second liquid inlet / outlet port 5 at the right end of the first heat exchanger is connected to the second liquid inlet / outlet port 5 at the left end of the second spiral heat exchanger, the first liquid inlet / outlet port 4 at the right end of the second heat exchanger is connected to the first liquid inlet / outlet port 4 at the left end of the third spiral heat exchanger, and the second liquid inlet / outlet port 5 at the right end of the third heat exchanger is connected to the second liquid inlet / outlet port 5 at the left end of the fourth spiral heat exchanger.

[0044] From the above analysis, it is found that when the low-temperature liquid for cooling flows from inside to outside in the spiral heat exchanger, the liquid temperature at the outer end is higher than the liquid temperature at the inner end. As is clear, when the low-temperature liquid flows from outside to inside in the spiral heat exchanger, the liquid temperature at the inner end is higher than the liquid temperature at the outer end. In FIG. 10, the heat exchange liquid in the first heat exchanger flows from inside to outside, the outer liquid temperature of the first heat exchanger is higher than the inner liquid temperature, and the inner air of the first heat exchanger has a higher heat dissipation intensity than the outer air. The heat exchange liquid in the second heat exchanger flows from outside to inside, the outer liquid temperature of the second heat exchanger is lower than the inner liquid temperature, and the inner air of the second heat exchanger has a lower heat dissipation intensity than the outer air. The heat exchange liquid in the third heat exchanger flows from inside to outside, the outer liquid temperature of the third heat exchanger is higher than the inner liquid temperature, and the inner air of the third heat exchanger has a higher heat dissipation intensity than the outer air. The heat exchange liquid in the fourth heat exchanger flows from outside to inside, the temperature of the liquid on the outside of the fourth heat exchanger is lower than that of the liquid on the inside, and the heat dissipation intensity of the air inside the fourth heat exchanger is smaller than that of the air outside. Therefore, when the air flows from right to left in Fig. 10 through the fourth, third, second and first heat exchangers in order, a target air with a relatively uniform temperature can be obtained, which is very suitable for air conditioning systems.

[0045] As can be easily understood, if the sizes and structures of the above four heat exchangers are completely consistent, the four can be very easily assembled together in the manner shown in Figures 9 and 10, and after the assembly is completed, each heat exchanger will be arranged in an orderly manner.

[0046] As shown in FIG. 10 again, in order to more easily and tightly connect the four heat exchangers together, the core shaft 1 of each heat exchanger in this embodiment uses a hollow tube structure with an axial through hole 101, a tie bar 13 with male threads on both ends is inserted into the axial through hole 101, and a lock nut 14 is screwed onto both ends of the tie bar 13, so that each spiral heat exchanger is axially gripped and fixed by the tie bar 13 and the two lock nuts 14.

[0047] 9 and 10, each heat exchanger includes a cylindrical casing 10 arranged coaxially around the outer periphery of the spiral coil tape 2. In order to reduce the axial gap between two adjacent heat exchangers as much as possible and thereby reduce gas leakage, in this embodiment, the cylindrical casings 10 of any two adjacent heat exchangers are abutted against each other in a sealed manner.

[0048] Referring to Figures 7 and 8, the first liquid-permeable coil tape 2 of this embodiment includes two heat transfer strips 202 arranged in parallel, and a liquid sealing strip 203 sealed and installed between the sides of the two heat transfer strips, and the spiral liquid flow path 201 is formed between the liquid sealing strip and the two heat transfer strips.

[0049] As can be easily understood, the liquid sealing strip 203 can not only seal the liquid flow path to prevent leakage of liquid, but also support the two heat transfer ribbons 202 of the first liquid permeable coil tape 2, so that the two heat transfer ribbons 202 can be spaced apart to form a liquid flow path. However, the support strength and support area of ​​the liquid sealing strip 203 for the two heat transfer ribbons 202 are limited, and when the axial width of the first liquid permeable coil tape 2 is large, the two heat transfer ribbons 202 are likely to approach each other, causing a problem of clogging of the flow path. Based on this, in this embodiment, a number of press protrusions 202a are located in the spiral liquid flow path 201 and distributed at intervals to support the two heat transfer ribbons 202, and are integrally provided on one of the heat transfer ribbons 202. The densely distributed press protrusions 202a are used to further support the two heat transfer ribbons 202, thereby ensuring a stable structure of the spiral liquid flow path and making it difficult for collapse or clogging to occur.

[0050] In order to increase the liquid passage area of ​​the first liquid inlet / outlet port 4 and the second liquid inlet / outlet port 5, as shown in Figure 6, in this embodiment, one heat transfer ribbon 202 of the first liquid inlet / outlet port 4 and the second liquid inlet / outlet port 5 is folded, thereby providing an arc-shaped folded portion 202b that protrudes outward along the radial direction of the core shaft 1.

[0051] 7, the heat transfer ribbon 202 is made of aluminum foil with a thickness of less than 1 mm. The thickness (or depth) of each spiral liquid flow passage 201 in the first liquid permeable coil tape 2 and the interval between adjacent layers of the first liquid permeable coil tape 2 are only a few millimeters, and the thin heat transfer ribbon and thin fluid flow passages improve the heat exchange area and heat exchange efficiency of the hot and cold fluids.

[0052] 8, in this embodiment, two guide strips 205 are provided in the spiral liquid flow path 201, linearly extending along the spiral direction of the first liquid permeable coil tape 2, and the two guide strips 205 are parallel to each other, so that the liquid that enters the spiral liquid flow path 201 is branched into three and flows in the same direction, improving the uniformity of the liquid flow in the spiral liquid flow path 201. In addition, the guide strips 205 can further support the two heat transfer ribbons 202 of the first liquid permeable coil tape 2, so that the two heat transfer ribbons 202 are spaced apart from each other at a certain interval to form a liquid flow path with a stable structure.

[0053] The guide strips 205, the liquid flow path partition strips 204 and the liquid sealing strips 203 are preferably rubber strips.

[0054] The first liquid permeable coil tape 2 is not limited to the above single-layer structure, and may have a multi-layer structure similar to that having a multi-layer spiral liquid flow path described in the following Example 7. For example, in another embodiment, the first liquid permeable coil tape includes a plurality of tape bodies spirally wound around the outer periphery of the core shaft, each of which is provided with a spiral liquid flow path, and the plurality of tape bodies are arranged in parallel to each other at intervals in the radial direction of the core shaft, whereby a fourth gas permeable flow path penetrating from left to right is formed between adjacent tape bodies.

[0055] Example 2 11 and 12 show a second specific embodiment of the spiral heat exchanger of this embodiment, the structure of which is similar to that of embodiment 1, with the following differences: A liquid flow path partition strip 204 extending left and right (i.e., extending parallel to the axis of the core shaft) is provided in the first liquid permeable coil tape 2. This liquid flow path partition strip 204 divides the spiral liquid flow path 201 into two liquid sub-flow paths 201a separated from each other, one of which, the liquid sub-flow path 201a, is located outside the other liquid sub-flow path 201a. The second liquid inlet / outlet port 5 is not provided at the outer end of the entire length of the first liquid permeable coil tape 2, but is provided at the outer end of the length of the inner liquid sub-flow path 201a, i.e., the first liquid inlet / outlet port 4 and the second liquid inlet / outlet port 5 are provided at both ends of the length of the inner liquid sub-flow path 201a, respectively, and the two are mutually communicated via the inner liquid sub-flow path 201a. A third liquid inlet / outlet port 6 extending to the left in parallel to the axis of the core shaft 1 is provided at the inner end of the length of the outer liquid sub-channel, and a fourth liquid inlet / outlet port 7 extending to the right in parallel to the axis of the core shaft 1 is provided at the inner end of the length of the outer liquid sub-channel, and the third liquid inlet / outlet port 6 and the fourth liquid inlet / outlet port 7 are mutually connected via the outer liquid sub-channel 201a.

[0056] In practical application, the gases axially injected into the inlet positions of the first gas passage 3 of the spiral heat exchanger usually have the same inlet temperature, and the liquids fed into the two liquid sub-passages 201a usually have the same inlet temperature. The outlet temperatures of the two liquid streams are mainly determined by the length of the liquid passage. In view of this, in this embodiment, the lengths of the two liquid sub-passages 201a are set to be equal, so that the outlet temperatures of the two liquid streams are close to each other, and further, the outlet temperatures of the "two" gas streams that exchange heat with the two liquid streams are also close to each other.

[0057] In practical application, the liquid fed to the first liquid inlet / outlet port 4 flows along the spiral direction (i.e., longitudinal direction) of the inner liquid sub-channel 201a to the second liquid inlet / outlet port 5. The liquid fed to the third liquid inlet / outlet port 6 flows along the spiral direction (i.e., longitudinal direction) of the outer liquid sub-channel 201a to the fourth liquid inlet / outlet port 7. This allows a total of two heat exchange liquid flows to be injected into the spiral heat exchanger, further improving the liquid throughput and heat exchange capacity of the spiral heat exchanger and eliminating the defects of the single liquid passage heat exchanger of Example 1, such as high flow resistance and low flow rate.

[0058] Obviously, the heat exchanger of this embodiment also has the problem of non-uniform exhaust temperature when a single one is used. In response to this, the method shown in Figures 9-10 of the first embodiment can still be used, and multiple spiral heat exchangers of this structure are combined together, that is, the first liquid inlet / outlet port 4 or the second liquid inlet / outlet port 5 of two adjacent spiral heat exchangers are connected to each other, and the third liquid inlet / outlet port 6 or the fourth liquid inlet / outlet port 7 of two adjacent spiral heat exchangers are also connected to each other.

[0059] Example 3 13 and 14 show a third specific embodiment of the spiral heat exchanger of this embodiment, the structure of which is similar to that of embodiment 2, with the following differences: There is not one but multiple liquid flow path partition strips 204 provided in the first liquid permeable coil tape 2. Each liquid flow path partition strip 204 extends left and right, and these liquid flow path partition strips 204 are arranged at intervals along the spiral direction of the first liquid permeable coil tape 2. These liquid flow path partition strips 204 divide the spiral liquid flow path 201 into multiple liquid sub-flow paths 201a that are arranged in order along the spiral direction of the first liquid permeable coil tape 2 and are separated from each other. The first liquid inlet / outlet port 4 and the second liquid inlet / outlet port 5 are provided at both ends of the length of the innermost liquid sub-flow path 201a, respectively, and the two are in communication with each other via the innermost liquid sub-flow path 201a. A third liquid inlet / outlet port 6 extending to the left parallel to the axis of the core shaft 1 is provided at the inner end of the length of each of the other liquid sub-flow paths, and a fourth liquid inlet / outlet port 7 extending to the left and right parallel to the axis of the core shaft 1 is provided at the outer end of the length, and each of the ``other liquid sub-flow paths'' connects the third liquid inlet / outlet port 6 and the fourth liquid inlet / outlet port 7 at both ends of its length to each other.

[0060] In practical application, liquid fed to the first liquid inlet / outlet port 4 flows along the length of the innermost liquid sub-channel 201a to the second liquid inlet / outlet port 5. Liquid fed to each of the third liquid inlet / outlet ports 6 flows along the length of the corresponding liquid sub-channel 201a to the corresponding fourth liquid inlet / outlet port 7. In this way, multiple heat exchange liquid streams can be injected into the spiral heat exchanger simultaneously, further improving the liquid throughput and heat exchange capacity of the spiral heat exchanger.

[0061] By dividing the spiral liquid flow path into a number of independent liquid sub-flow paths, the length of each liquid sub-flow path in the spiral direction is shortened, thereby shortening the heat exchange time of each liquid sub-flow path, reducing the temperature difference in the spiral direction of each liquid sub-flow path, making the heat exchange of the air in the gas passage more uniform, and further making the temperature distribution of the air discharged at the discharge end of the gas passage more uniform.

[0062] Obviously, the heat exchanger of this embodiment also has the problem of non-uniform exhaust temperature when a single one is used. In response to this, the method shown in Figures 9 and 10 of the first embodiment can still be used, and multiple spiral heat exchangers of this structure are combined together, that is, the first liquid inlet / outlet port 4 or the second liquid inlet / outlet port 5 of two adjacent spiral heat exchangers are connected to each other, and the corresponding third liquid inlet / outlet port 6 or fourth liquid inlet / outlet port 7 of two adjacent spiral heat exchangers are also connected to each other.

[0063] In this embodiment, the heat exchanger has a large number of liquid inlet / outlet ports, and if the length of each liquid sub-channel 201a is set to be equal using the concept of embodiment 2, these liquid inlet / outlet ports will be distributed over a large area on the coil tape, which will not only increase the difficulty of manufacturing the heat exchanger, but also increase the difficulty of serializing a plurality of heat exchangers. Therefore, this embodiment does not mechanically use the equal-length channel design of embodiment 2, but distributes each liquid channel partition strip 204 linearly along the radial direction of the core shaft 1, so that the ends of each liquid sub-channel 201a are located in the same radial direction of the core shaft 1. Based on this, in this embodiment, the first liquid inlet / outlet port 4 and each third liquid inlet / outlet port 6 are distributed linearly along the radial direction of the core shaft 1, and the second liquid inlet / outlet port 5 and each fourth liquid inlet / outlet port 7 are also distributed linearly along the radial direction of the core shaft 1, thereby reducing the difficulty of manufacturing and serializing the heat exchanger.

[0064] Obviously, a guide strip 205 may be provided in each liquid sub-channel 201a to improve the uniformity of the liquid flow in each liquid sub-channel 201a.

[0065] Example 4 FIG. 15 shows a fourth specific embodiment of the spiral heat exchanger of this embodiment, the structure of which is similar to that of embodiment 1, with the following differences: The air passage support member in the first gas passing passage 3 is not a plurality of regularly arranged air pipes, but a corrugated plate 9 sandwiched between two adjacent layers of the first liquid permeable coil tape 2. The corrugated plate 9 includes a plurality of corrugated peaks and a plurality of corrugated valleys that are alternately distributed in the spiral direction of the first gas passing passage 3, and the length of each of the corrugated peaks and each of the corrugated valleys extends parallel to the axis of the core shaft 1.

[0066] As is known, the corrugated plate 9 is easily bent in the direction of the corrugation peaks and valleys, but has strong bending resistance in the direction of the length of the corrugation peaks or valleys. This embodiment makes good use of the above structural characteristics of the corrugated plate 9, and arranges the corrugation peaks and valleys alternately in the spiral direction of the first gas passage 3, so that the corrugated plate 9 can be bent and arranged in the spiral direction, which not only facilitates the processing and manufacturing of the spiral heat exchanger, but also improves the bending strength of the main body of the spiral heat exchanger.

[0067] The corrugated plate 9 is made of a material having excellent heat transfer properties, for example, an aluminum or steel corrugated plate having a thickness of less than 1 mm or several mm.

[0068] Example 5 FIG. 16 shows the fifth specific embodiment of the spiral heat exchanger of this embodiment, the structure of which is similar to that of the first and fourth embodiments, with the following differences: In this embodiment, the air passage support member in the first gas passing passage 3 is not a plurality of regularly arranged ventilation pipes, nor a corrugated plate 9 placed at a specific angle, but a plurality of press protrusions 202a formed directly and integrally with one of the heat transfer ribbons 202. These press protrusions 202a are arranged at intervals within the first gas passing passage 3, and support the space between two adjacent layers of the first liquid passing coil tape 2, thereby ensuring smooth and stable flow of the first gas passing passage 3.

[0069] In the above five embodiments, the first liquid permeable coil tape 2 is wound in a circular spiral shape around the outer periphery of the core shaft 1, i.e., the first liquid permeable coil tape 2 is in a circular spiral shape, and a heat exchanger of this shape is easy to process and manufacture. In some other embodiments of the present application, the first liquid permeable coil tape 2 may be in a non-circular spiral shape, i.e., the first liquid permeable coil tape 2 may be wound in a non-circular spiral shape around the outer periphery of the core shaft 1. In general, the non-circular spiral is preferably an elliptical spiral, and a heat exchanger of this shape has a flat outer shape, is more aesthetic, and can be arranged in a flat space, making full use of the flat space to maximize the heat exchange performance of the heat exchanger.

[0070] Example 6 17 and 18 show a sixth specific embodiment of the spiral heat exchanger of this embodiment, which is a further improvement of the heat exchanger of embodiment 1, and its structure and effect are similar to those of embodiment 2.

[0071] In addition to the structure of the first embodiment, the spiral heat exchanger of this embodiment has one second liquid permeable coil tape 11 wound in a spiral shape for about four turns around the outer periphery of the first liquid permeable coil tape 2, i.e., has two liquid permeable coil tapes in total. Any two adjacent layers of the second liquid permeable coil tape 11 are spaced apart at a fixed interval, thereby forming a spiral second gas passing flow path 12 penetrating left and right between the layers of the second liquid permeable coil tape 11. A third liquid inlet / outlet port 6 extending to the left in parallel with the axis of the core shaft 1 and a fourth liquid inlet / outlet port 7 extending to the right in parallel with the axis of the core shaft 1 are provided at both ends of the length of the second liquid permeable coil tape 11 in the spiral direction. The third liquid inlet / outlet port 6 is provided at the inner end of the second liquid permeable coil tape 11, and the fourth liquid inlet / outlet port 7 is provided at the outer end of the second liquid permeable coil tape 11.

[0072] In practical application, the liquid sent to the first liquid inlet / outlet port 5 flows along the spiral direction (i.e., longitudinal direction) of the first liquid passing coil tape 2 to the second liquid inlet / outlet port 5. The liquid sent to the third liquid inlet / outlet port 6 flows along the spiral direction (i.e., longitudinal direction) of the second liquid passing coil tape 11 to the fourth liquid inlet / outlet port 7. This allows a total of two heat exchange liquid flows to be injected into the spiral heat exchanger, further improving the liquid passing amount and heat exchange capacity of the spiral heat exchanger and eliminating the defects such as large flow resistance and small flow rate that exist in the single liquid passage heat exchanger of Example 1.

[0073] Obviously, the heat exchanger of this embodiment also has the problem of non-uniform exhaust temperature when a single one is used. In response to this, the method shown in Figures 9 and 10 of the first embodiment can still be used, and multiple spiral heat exchangers of this structure are combined together, that is, the first liquid inlet / outlet port 4 or the second liquid inlet / outlet port 5 of two adjacent spiral heat exchangers are connected to each other, and the third liquid inlet / outlet port 6 or the fourth liquid inlet / outlet port 7 of two adjacent spiral heat exchangers are also connected to each other.

[0074] In practical application, the gas injected axially into the inlet positions of the first gas-passing passage 3 and the second gas-passing passage 12 of the spiral heat exchanger usually has the same inlet temperature, and the liquid sent to the two liquid-passing coil tapes usually has the same inlet temperature, and the outlet temperature of the two liquid flows is mainly determined by the length of the liquid passage. Considering this, in this embodiment, the lengths of the first liquid-passing coil tape 2 and the second liquid-passing coil tape 11 are set to be equal, thereby making the outlet temperatures of the two liquid flows close to each other, and further making the outlet temperatures of the "two" gas flows that perform heat exchange with the two liquid flows close to each other.

[0075] As is apparent, in the above-mentioned Examples 2 to 6, the first liquid permeable coil tape and the second liquid permeable coil tape may be similar to the multi-layer structure having a multi-layer spiral liquid flow path described in the following Example 7.

[0076] Example 7 19 to 23 show another spiral heat exchanger, and since the spiral heat exchanger of this embodiment 7 has basically the same structure as the spiral heat exchanger of embodiment 1, the same members and similar members are given the same reference numerals and can be understood by referring to the description of embodiment 1. The following mainly describes the difference between this embodiment and embodiment 1.

[0077] In this embodiment, the first liquid passing coil tape includes a plurality of (specifically, two) tape bodies, each of which has a spiral liquid passage formed therein and which spirally surrounds the outer periphery of the core shaft, and the two tape bodies are arranged in parallel to each other at a distance in the radial direction of the core shaft, thereby forming a fourth gas passing passage penetrating left and right between the adjacent tape bodies.

[0078] In addition to the above-mentioned fourth gas passing flow passage being formed between the multiple tape bodies constituting the first liquid passing coil tape, as in Example 1, any two adjacent layers of the first spiral coil tape are spaced apart by a fixed distance, thereby forming a spiral-shaped first gas passing flow passage penetrating left and right between the spiral coil tapes of adjacent layers.

[0079] The first liquid passing coil tape is spirally wound around the core shaft and includes a plurality of parallel spaced spiral tape bodies, each of which can be independently passed through by liquid during practical application, allowing a total of a plurality of flows of heat exchange liquid to be injected into the spiral heat exchanger, thereby improving the liquid passing rate and heat exchange capacity of the spiral heat exchanger and eliminating the disadvantages of a heat exchanger with a single liquid passage, such as high flow resistance and low flow rate.

[0080] Furthermore, each tape body is provided at its inner end in the spiral direction (i.e., longitudinal direction) with a first liquid inlet / outlet port extending to the left in parallel with the axis of the core shaft, and each tape body is provided at its outer end in the spiral direction with a second liquid inlet / outlet port extending to the right in parallel with the axis of the core shaft. The first liquid inlet / outlet port and the second liquid inlet / outlet port communicate with each other through the spiral liquid passage in the coil tape. In practical application, a liquid (usually water or refrigerant liquid) sent to one of the liquid inlet / outlet ports flows to the other liquid inlet / outlet port along the spiral direction of the first liquid-passing coil tape (which is also the spiral direction of the spiral liquid passage). At the same time, the gas that needs to be heated or cooled enters the first gas passage passage and the fourth gas passage passage from one side in the axial direction of the heat exchanger, flows from left to right or right to left, and then flows out from the other side in the axial direction of the heat exchanger. Furthermore, because there is a temperature difference between the gas flowing through the two gas passages and the liquid flowing through the liquid passage coil tape, heat exchange occurs, and gas or liquid at a desired temperature is obtained.

[0081] In practical application, multiple spiral heat exchangers can be combined and used in the manner shown in Figure 23 to form a heat exchange device that can exhaust air at a uniform temperature. In Figure 23, the core shafts of each of the spiral heat exchangers are coaxially arranged, and the corresponding liquid inlet and outlet ports of any two adjacent spiral heat exchangers are interconnected.

[0082] As is evident, the smaller the radial thickness of the tape body of the first liquid passing coil tape, i.e., the flatter it is, the greater the heat exchange area and efficiency of the spiral heat exchanger. However, it is difficult to provide liquid inlet and outlet ports extending in the axial direction on a flat tape body. In response to this, a seal strip is provided on both ends of the length of the fourth gas passing passage in this embodiment, thereby blocking the fourth gas passing passage at the position of the first liquid inlet and outlet port of the two tape bodies, and blocking the fourth gas passing passage at the position of the second liquid inlet and outlet port of the two tape bodies. In practical application, the entire heat exchange liquid can be injected into the position of these two first liquid inlet and outlet ports (or two second liquid inlet and outlet ports), and since the fourth gas passing passage here is blocked by the seal strip, there is no problem that the supplied heat exchange liquid enters the fourth gas passing passage. This corresponds to integrating the first liquid inlet and outlet ports of the two tape bodies into one to form the same general port, and integrating the second liquid inlet and outlet ports of the two tape bodies into one to form another same general port. This structural design also facilitates the concentrated discharge of the heat exchange liquid within the tape body of each piece.

[0083] Example 8 As can be seen from the above introduction, when the spiral heat exchanger of each of the above embodiments is used alone, there is a problem that the temperature of the exhaust gas flowing out of the third gas passage is not uniform. It has been proposed to combine multiple spiral heat exchangers in series to obtain a uniform exhaust gas temperature, but this method requires a lot of manpower and material resources.

[0084] In contrast, Figs. 24 to 35 show another spiral heat exchanger, which includes an inner support 18, and a third liquid permeable coil tape 15 having a liquid permeable space therein is spirally wound around the outer periphery of the inner support 18, and the winding axis of the third liquid permeable coil tape 15 extends along the left-right direction. The inner support 18 supports the spiral third liquid permeable coil tape 15 and is used to prevent the innermost ring of the third liquid permeable coil tape 15 from collapsing and deforming because it does not have a radial support. The third liquid permeable coil tapes 15 of adjacent layers are spaced apart at a certain interval, thereby forming a third gas passing flow path 16 that penetrates from left to right. In order to prevent the third liquid permeable coil tapes 15 of adjacent layers from coming into close contact with each other and causing clogging of the third gas passing flow path 16, an air passage support member 17 (also called an air passage support member) is installed in the third gas passing flow path 16 to support the space between two adjacent layers of the third liquid permeable coil tapes 15.

[0085] In actual application, liquid (e.g., water) is injected into the liquid passing space in the third liquid passing coil tape 15, and the liquid flows along the spiral direction in the third liquid passing coil tape 15, and gas (e.g., air) having a temperature difference from the liquid is injected into the third gas passing passage 16, and the gas flows from right to left in the third gas passing passage 16. Because there is a temperature difference between the gas flowing in the third gas passing passage 16 and the liquid flowing in the third liquid passing coil tape 15, heat exchange occurs, and thus gas or liquid at a desired temperature is obtained.

[0086] In this embodiment, the liquid passing space in the third liquid passing coil tape 15 includes 2N+2 sub-flow paths 1502 extending in a spiral shape, and the 2N+2 sub-flow paths are arranged in the left-right direction and communicate with each other in sequence, where N is an integer equal to or greater than 0. Of the 2N+2 sub-flow paths 1502, the leftmost sub-flow path has a first liquid inlet / outlet 1503, and the rightmost sub-flow path has a second liquid inlet / outlet 1504. A third liquid inlet / outlet 1801 communicating with the first liquid inlet / outlet and a fourth liquid inlet / outlet 1802 communicating with the second liquid inlet / outlet are provided penetrating the inner support.

[0087] The above design increases the flow stroke and heat exchange time of the liquid in the third liquid passing coil tape 15, and further contributes to improving the heat exchange strength of the spiral heat exchanger. More importantly, the above design makes the gas flowing out from each position on the left or right side of the spiral heat exchanger have a relatively uniform exhaust temperature in practical application.

[0088] Specifically, referring to Fig. 30 and Fig. 31 in conjunction with Fig. 24 to Fig. 25, in the case of N = 0, in this embodiment, a partition strip 1501 extending in a spiral shape is provided in the third liquid permeable coil tape 15, and the partition strip 1501 divides the liquid passing space in the third liquid permeable coil tape 15 into two sub-flow paths 1502 extending in a spiral shape, and these two sub-flow paths 1502 are arranged in the left-right direction and communicate with each other at the outer end in the spiral direction. Furthermore, of the two sub-flow paths 1502, the left sub-flow path 1502 has a first liquid inlet / outlet 1503, and the right sub-flow path 1502 has a second liquid inlet / outlet 1504. A third liquid inlet / outlet 1801 is formed in the left end face of the inner support 18, which penetrates to the first liquid inlet / outlet 1503 and communicates with the first liquid inlet / outlet 1503. A fourth liquid inlet / outlet 1802 is formed in the right end face of the inner support 18, which penetrates to the second liquid inlet / outlet 1504 and communicates with the second liquid inlet / outlet 1504. In addition, the third liquid inlet / outlet 1801 and the fourth liquid inlet / outlet 1802 are provided opposite each other in the left-right direction.

[0089] In an application scenario, the hot air in the environment passes through the third gas passage 16 of the spiral heat exchanger from right to left when the blower is driven. The low-temperature liquid for cooling flows into the spiral heat exchanger from the third liquid inlet / outlet 1801 on the left side of the inner support 18, and flows into the left sub-passage 1502 through the first liquid inlet / outlet 1503. The liquid in the left sub-passage 1502 flows from the inside to the outside along the longitudinal direction (spiral direction) of the sub-passage 1502 to the end (outermost end), then enters the right sub-passage 1502, and then flows from the outside to the inside along the longitudinal direction (spiral direction) of the right sub-passage 1502 to the end, then enters the inner support 18 through the second liquid inlet / outlet 1504, and then flows out of the fourth liquid inlet / outlet 1802 on the right side of the inner support 18.

[0090] In the above application scenario, after the low-temperature liquid enters the spiral heat exchanger through the third liquid inlet / outlet 1801, it first flows from inside to outside along the spiral direction, and then flows from outside to inside along the spiral direction, absorbing the heat of the air in the third gas passage 16 during the process, and then obtaining the cold air flowing out of the right side of the heat exchanger. It can be seen that the temperature of the liquid in the spiral heat exchanger gradually increases along its flow path, and the temperature difference between the two liquid flows in the innermost ring is the largest, and the temperature difference between the two liquid flows in the outermost ring is the smallest (almost equal), and if the third liquid-passing coil tape 15 is virtually divided into a number of concentric ring regions, the liquid in each concentric ring region has an almost equal average temperature, so that the air flowing out of each position on the right side of the spiral heat exchanger has a relatively uniform exhaust air temperature, which is very suitable for air conditioning systems.

[0091] With the above design, the liquid inlet and liquid outlet of the liquid passage space are symmetrically arranged on both the left and right sides of the heat exchanger, so that in practical application, it is very easy to form a heat exchange system by arranging multiple spiral heat exchangers with the above structure in series in the manner of Fig. 36, and further improve the heat exchange strength of the fluid. Specifically, the heat exchange system shown in Fig. 36 includes multiple spiral heat exchangers with the above structure, which are arranged in series along the left-right direction, and the third liquid inlet / outlet 1801 and the fourth liquid inlet / outlet 1802 of adjacent spiral heat exchangers are connected to each other.

[0092] In another application scenario, multiple spiral heat exchangers with the above structure may be connected in series in the manner shown in Figure 37 via pipes, and each spiral heat exchanger may be used to exchange heat with air in different areas to obtain cold or hot air in multiple areas.

[0093] The so-called "liquid port" means that the port can be used as a liquid inlet or outlet.

[0094] In this embodiment, the first liquid inlet / outlet 103 and the second liquid inlet / outlet 104 are both provided in the innermost ring of the liquid-permeable coil tape 1. In this way, on the one hand, the first liquid inlet / outlet 103 and the second liquid inlet / outlet 104 are closer to the third liquid inlet / outlet 401 and the fourth liquid inlet / outlet 402 in the inner support 4, thereby facilitating their connection and communication, and on the other hand, the flow stroke of the liquid in the liquid-permeable coil tape 1 can be increased, improving the heat exchange intensity.

[0095] Referring again to Fig. 32 in conjunction with Figs. 24 to 26, the third liquid permeable coil tape 15 is better supported so that the innermost ring of the third liquid permeable coil tape 15 can be gently wound outward without obvious bending and deformation, so that the outer peripheral surface of the inner support 18 includes a spiral surface 1803 (i.e., at least a part of the outer peripheral surface of the inner support 18 is the spiral surface 1803), and the innermost ring of the third liquid permeable coil tape 15 is provided in close contact with the spiral surface 1803. The spiral surface 1803 is a surface that extends in a spiral shape, and in Fig. 25, the distance between the spiral surface 1803 and the left-right axis line gradually increases in the direction surrounding the left-right axis line in a clockwise direction. In this embodiment, the left-right axis line is the central axis line of the endless ring 18a described below, and is also the winding axis line of the third liquid permeable coil tape 15, and is a single imaginary line, and the left-right axis line extends perpendicularly in and out of the plane of the paper in Fig. 25.

[0096] The entire inner support 18 has a ring-shaped structure. In order to facilitate the manufacture of the inner support 18, the present embodiment designs the inner support 18 as three detachable parts. Specifically, referring to FIG. 33, the inner support 18 includes an endless ring 18a, an opening ring 18b, and a switching head 18c. An assembly groove 18aa is formed on the outer circumferential surface of the endless ring 18a, which is recessed inward. The opening ring 18b is removably fitted in close contact with the outer circumferential surface of the endless ring 18a, and the opening of the opening ring 18b corresponds to the assembly groove 18aa. The switching head 18c is removably attached to the assembly groove 18aa, and the third liquid inlet / outlet 1801 and the fourth liquid inlet / outlet 1802 are both provided on the switching head 18c.

[0097] The spiral surface 1803 of the inner support 18 can be divided into two parts, one part being the outer circumferential surface of the open ring 18b, and the other part being formed on the switching head 18c. The switching head 18c abuts against the opening of the open ring 18b, and thus the switching head 18c can be used to fix the position of the open ring 18b and prevent the open ring 18b from rotating in the circumferential direction of the endless ring 18a.

[0098] Referring to Figure 32, in conjunction with Figures 24 to 26, in order to better protect the outer ring of the spiral heat exchanger, this embodiment further arranges a ring-shaped outer support 19, which is fitted onto the outer periphery of the spiral coil tape and fixed in close contact with the outer ring of the spiral coil tape.

[0099] 32 to 35, in conjunction with FIG. 25 and FIG. 26, in this embodiment, the third liquid permeable coil tape 15 includes an inner tape body 1505 extending in a spiral shape, an outer tape body 1506 extending in a spiral shape and spaced apart parallel to the inner tape body 1505, and a liquid sealing strip 1507 hermetically connected between the side of the inner tape body 1505 and the side of the outer tape body 1506. The liquid permeable space in the third liquid permeable coil tape 15 is formed between the inner tape body 1505, the outer tape body 1506, and the liquid sealing strip 1507, and the partition strip 1501 is fixed between the inner tape body 1505 and the outer tape body 1506. The first liquid inlet / outlet 1503 and the second liquid inlet / outlet 1504 are specifically provided in the inner tape body 1505. The inner tape body 1505 and the outer tape body 1506 correspond to the heat transfer ribbon of the first embodiment.

[0100] Furthermore, the liquid sealing strip 1507 and the partition strip 1501 are both fixedly connected between the inner tape body 1505 and the outer tape body 1506 by a welding method, and for ease of implementation, in this embodiment, the liquid sealing strip 1507 and the partition strip 1501 are provided with solder grooves recessed inward, which are shown in Fig. 31 but not marked, and the liquid sealing strip 1507 and the partition strip 1501 are welded and fixed to the inner tape body 1505 and the outer tape body 1506 through the solder adhered to the solder grooves. In implementation, solder can be placed in the solder grooves of the liquid sealing strip 1507 and the partition strip 1501, and the liquid sealing strip 1507, the partition strip 1501, the inner tape body 1505 and the outer tape body 1506 can be welded and fixed using a soldering oven.

[0101] In this embodiment, the airway support member 17 is a spiral corrugated coil tape, also called a corrugated plate. The corrugated coil tape includes a plurality of wave crests 1701 and a plurality of wave troughs 1702 arranged alternately along the spiral direction. Both the wave crests 1701 and the wave troughs 1702 are provided with solder grooves, and both are welded to the adjacent two layers of third liquid permeable coil tape 15 via solder fixed to the solder grooves.

[0102] As is known, the corrugated member is easily bent in the direction of the arrangement of the wave crests 1701 and the wave troughs 1702, but has strong bending resistance in the direction of the length of the wave crests 1701 or the wave troughs 1702. This embodiment makes good use of the above structural characteristics of the corrugated member, and arranges the wave crests 1701 and the wave troughs 1702 alternately in sequence along the spiral direction of the third gas passage 16, so that the corrugated member can be bent and arranged along the spiral direction, which not only facilitates the processing and manufacturing of the spiral heat exchanger, but also improves the bending strength of the main body of the spiral heat exchanger.

[0103] The inner support 18 has a blower mounting cavity 1804, which can be used to mount a blower to drive gas through the third gas passage 16. In practical application, the coolant injected into the inner support 18 to absorb the heat of the gas can further cool the blower in the blower mounting cavity 1804 and prevent the blower from overheating.

[0104] Example 9 The spiral heat exchanger of the present embodiment 9 has basically the same structure as the spiral heat exchanger of the embodiment 8, and can be understood by referring to the description of the embodiment 8. The following mainly describes the difference between the present embodiment and the embodiment 8.

[0105] 38, in this embodiment, three partition strips 1501 extending in a spiral shape are provided in the third liquid permeable coil tape 15, the three of which are arranged in sequence at intervals along the left-right direction, and the three partition strips 1501 divide the liquid permeable space in the third liquid permeable coil tape 15 into four sub-channels 1502 extending in a spiral shape, and the four sub-channels 1502 are arranged in the left-right direction and communicate with each other in sequence. Of the four sub-channels 1502, the first liquid inlet / outlet 1503 communicating with the third liquid inlet / outlet 1801 is specifically provided in the leftmost sub-channel 1502, and the second liquid inlet / outlet 1504 communicating with the fourth liquid inlet / outlet 1802 is specifically provided in the rightmost sub-channel 1502.

[0106] In one application scenario, liquid enters the spiral heat exchanger through the third liquid inlet / outlet 1801 of the inner support 18 , and then flows through the first liquid inlet / outlet 1503 into the leftmost sub-channel 1502 . The liquid in the leftmost sub-channel 1502 flows from the inside to the outside along the longitudinal direction (spiral direction) of the sub-channel 1502 to its end (outermost end), then enters the second sub-channel 1502, then flows from the outside to the inside along the longitudinal direction (spiral direction) of the second sub-channel 1502 to its end (innermost end), then enters the third sub-channel 1502, then flows from the inside to the outside along the longitudinal direction (spiral direction) of the third sub-channel 1502 to its end (innermost end), then flows into the fourth sub-channel 1502, i.e., the rightmost sub-channel 1502, and then flows from the outside to the inside along the longitudinal direction (spiral direction) of the rightmost sub-channel 1502 to its end, before entering the inner support 18 from the second liquid inlet / outlet 1504 and flowing out from the fourth liquid inlet / outlet 1802 of the inner support 18.

[0107] In another embodiment, there are five partition strips 1501 installed in the third liquid-passing coil tape 15, and the five partition strips 1501 divide the liquid passing space in the third liquid-passing coil tape 15 into six sub-flow paths 1502, and the first liquid inlet / outlet 1503 is specifically provided in the leftmost sub-flow path 1502, and the second liquid inlet / outlet 1504 is specifically provided in the rightmost sub-flow path 1502.

[0108] As can be seen, a larger number of partition strips 1501 may be set to obtain more sub-channels 1502, thereby increasing the heat exchange stroke and time of the heat exchange liquid in the third liquid passing coil tape 15, and improving the heat exchange intensity. Note that, since both the liquid inlet and outlet can be provided on the inner support 18, the number of partition strips 1501 is preferably an odd number, and accordingly an even number of sub-channels 1502 are obtained.

[0109] Example 10 Figures 39 to 41 show another spiral heat exchanger, which has basically the same structure as the spiral heat exchanger of Example 8 and can be understood by referring to the explanation of Example 7. The following mainly explains the difference between this example and Example 8.

[0110] In this embodiment, the third liquid inlet / outlet 1801 and the fourth liquid inlet / outlet 1802 are both located on the left side of the inner support 18. The advantage of this design is that multiple spiral heat exchangers can be serially connected in sequence in the manner of Fig. 41 through the liquid passage pipes, and all the liquid passage pipes can be "hidden" on the same side of each spiral heat exchanger.

[0111] In another embodiment, the third liquid inlet / outlet 1801 and the fourth liquid inlet / outlet 1802 are both provided on the right side of the inner support 18 .

[0112] In another embodiment, the third liquid inlet / outlet 1801 and the fourth liquid inlet / outlet 1802 are both provided in the outer support 19. Under this circumstance, it is preferable that the first liquid inlet / outlet 103 and the second liquid inlet / outlet 104 are provided in the outermost ring of the liquid-passing coil tape 1, which on the one hand facilitates the connection and communication between the first liquid inlet / outlet 103, the second liquid inlet / outlet 104 and the third liquid inlet / outlet 401 and the fourth liquid inlet / outlet 402, and on the other hand can increase the flow stroke of the liquid in the liquid-passing coil tape 1 and improve the heat exchange intensity. Explanation of symbols

[0113] 1-core shaft, 2-first liquid passing coil tape, 3-first gas passing flow path, 4-first liquid inlet / outlet port, 5-second liquid inlet / outlet port, 6-third liquid inlet / outlet port, 7-fourth liquid inlet / outlet port, 8-ventilation pipe, 9-corrugated plate, 10-cylindrical casing, 11-second liquid passing coil tape, 12-second gas passing flow path, 13-tie bar, 14-nut, 15-third liquid passing coil tape, 16-third gas passing flow path, 17-airway support member, 18-inner support, 19-outer support, 101--axial through hole, 2a--tape body, 2b--fourth gas passage channel, 201--spiral liquid passage channel, 201a--liquid sub-passage channel, 202--heat transfer ribbon, 202a--press protrusion, 202b--arc-shaped folded portion, 203--liquid sealing strip, 204--liquid passage partition strip, 205--guide strip, 1501 - partition strip, 1502 - sub-channel, 1503 - first liquid inlet / outlet, 1504 - second liquid inlet / outlet, 1505 - inner tape body, 1506 - outer tape body, 1507 - liquid sealing strip, 1701-Crest of the wave, 1702-Valve of the wave, 1801 - third liquid inlet / outlet, 1802 - fourth liquid inlet / outlet, 1803 - spiral surface, 1804 - blower mounting cavity, 18a - endless ring, 18b - opening ring, 18c - switching head, 18aa - assembly groove.

Claims

1. 1. A spiral heat exchanger comprising: A core shaft whose axis extends laterally; a first liquid-permeable coil tape wound in a spiral shape around the outer periphery of the core shaft for at least two turns and having a spiral liquid flow path therein; the first liquid passing coil tape of the adjacent layer is spaced apart from the other by a fixed distance, thereby forming a spiral first gas passing flow passage penetrating from left to right, the first liquid passing coil tape is provided with a first liquid inlet / outlet port and a second liquid inlet / outlet port which are spaced apart along the spiral direction of the first liquid passing coil tape and communicate with each other via the spiral liquid flow passage, the first liquid inlet / outlet port is provided at an inner end of the first liquid passing coil tape in the spiral direction and extends to the left in parallel with the axis of the core shaft, and the second liquid inlet / outlet port extends to the right in parallel with the axis of the core shaft, The first liquid-permeable coil tape includes two heat transfer strips arranged in parallel and a liquid sealing strip hermetically disposed between the sides of the two heat transfer strips, the spiral liquid flow passage is formed between the liquid sealing strip and the two heat transfer ribbons; a liquid flow passage partition strip extending to the left and right is provided within the first liquid passing coil tape, the liquid flow passage partition strip partitions the spiral liquid flow passage into two liquid sub-flow passages separated from each other, the first liquid inlet / outlet port and the second liquid inlet / outlet port are provided at both ends of the length of the inner liquid sub-flow passage, and a third liquid inlet / outlet port extending to the left in parallel with the axis of the core shaft and a fourth liquid inlet / outlet port extending to the right in parallel with the axis of the core shaft are provided at both ends of the length of the outer liquid sub-flow passage, or a first liquid passing coil tape having at least two liquid flow path partition strips extending laterally and spaced apart along a spiral direction of the first liquid passing coil tape, the liquid flow path partition strips dividing the spiral liquid flow path into at least three liquid sub-flow paths which are arranged in sequence along the spiral direction of the first liquid passing coil tape and which are separated from one another, the first liquid inlet / outlet port and the second liquid inlet / outlet port being provided at both ends of the length of an innermost liquid sub-flow path, and a third liquid inlet / outlet port extending to the left in parallel with the axis of the core shaft and a fourth liquid inlet / outlet port extending to the right in parallel with the axis of the core shaft being provided at both ends of the length of each of the remaining liquid sub-flow paths.

2. 2. The spiral heat exchanger according to claim 1, wherein the second liquid inlet / outlet port is provided at an outer end of the first liquid passing coil tape in a spiral direction.

3. 3. The spiral heat exchanger according to claim 2, further comprising a second liquid passing coil tape wound in a spiral shape around the outer periphery of the first liquid passing coil tape for at least two turns, the second liquid passing coil tape of an adjacent layer being spaced apart by a certain distance, thereby forming a second spiral gas passing passage penetrating from left to right, and a third liquid inlet / outlet port extending to the left in parallel with the axis of the core shaft and a fourth liquid inlet / outlet port extending to the right in parallel with the axis of the core shaft are provided at both ends of the length of the second liquid passing coil tape in the spiral direction, respectively.

4. the third liquid inlet / outlet port is located at an inner end of the liquid sub-channel in the spiral direction and extends to the left parallel to the axis of the core shaft, the fourth liquid inlet / outlet port is located at an outer end of the liquid sub-channel in the spiral direction and extends to the right parallel to the axis of the core shaft, 4. A spiral heat exchanger as described in claim 2 or 3, characterized in that the first liquid inlet / outlet port and each third liquid inlet / outlet port are distributed in a straight line along the radial direction of the core shaft, and the second liquid inlet / outlet port and each fourth liquid inlet / outlet port are distributed in a straight line along the radial direction of the core shaft.

5. the spiral liquid flow path includes 2N+2 sub-flow paths extending in a spiral shape, the 2N+2 sub-flow paths are arranged in a left-right direction and communicate with each other in sequence, N is an integer equal to or greater than 0, Among the 2N+2 sub-channels, the leftmost sub-channel has a first liquid inlet / outlet port, and the rightmost sub-channel has a second liquid inlet / outlet port; 2. The spiral heat exchanger according to claim 1, further comprising an inner support provided on the inner ring of the first liquid-passing coil tape or an outer support provided on the outer periphery of the first liquid-passing coil tape, wherein a third liquid inlet / outlet port communicating with the first liquid inlet / outlet port and a fourth liquid inlet / outlet port communicating with the second liquid inlet / outlet port are provided through the inner support and the outer support.

6. The first liquid passing coil tape is spirally wound around the outer periphery of the inner support, In the case where N=0, a partition strip extending in a spiral shape is provided in the first liquid passing coil tape, and the partition strip divides the spiral liquid passage into two sub-passages, and the outer ends of the two sub-passages are connected to each other, or 6. The spiral heat exchanger according to claim 5, wherein, when N≧1, 2N+1 partition strips extending in a spiral shape and arranged at intervals along the left-right direction are provided in the first liquid passing coil tape, and the 2N+1 partition strips divide the spiral liquid flow path into 2N+2 sub-flow paths arranged along the left-right direction and connected to each other in sequence.

7. 1. A spiral heat exchanger comprising: A core shaft whose axis extends laterally; a first liquid-permeable coil tape wound in a spiral shape around the outer periphery of the core shaft for at least two turns and having a spiral liquid flow path therein; the first liquid passing coil tapes of the adjacent layers are spaced apart at regular intervals, thereby forming a spiral first gas passing flow passage penetrating from left to right, the first liquid passing coil tape is provided with a liquid flow passage partition strip extending from left to right, the liquid flow passage partition strip partitions the spiral liquid flow passage into a plurality of liquid sub-flow passages which are arranged in order along the spiral direction and are separated from one another, and each of the liquid sub-flow passages is provided at its inner end and outer end in the spiral direction with a first liquid inlet / outlet port and a second liquid inlet / outlet port which communicate with each other via the liquid sub-flow passage, The first liquid-permeable coil tape includes two heat transfer ribbons arranged in parallel and a liquid sealing strip sealed between the sides of the two heat transfer ribbons, and the spiral liquid flow path is formed between the liquid sealing strip and the two heat transfer ribbons.

8. A heat exchange apparatus comprising at least two spiral heat exchangers according to any one of claims 1 to 7, wherein the core shafts of the spiral heat exchangers are arranged coaxially, and the first liquid inlet / outlet ports or the second liquid inlet / outlet ports of adjacent spiral heat exchangers are connected to each other.

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