Spiral heat exchanger

Abstract

The present application relates to a spiral heat exchanger, comprising: a core shaft with an axis extending to the left and right, a liquid-flowing tape spirally wound around the outer periphery of the core shaft for at least 2 turns, and a liquid-flowing tape with a spiral liquid channel therein; any two adjacent layers of liquid-flowing tapes are separated by a certain distance, thereby forming a spiral liquid-flowing channel that passes through the left and right, and a liquid-flowing tape is provided with a liquid-flowing strip extending to the left and right, and the liquid-flowing strip divides the spiral liquid channel into a plurality of liquid-flowing channels arranged in sequence and isolated from each other along the spiral direction, and each of the liquid-flowing channels is provided with a first liquid-inlet and a second liquid-outlet interface interconnected through the liquid-flowing channel at the inner and outer ends in the spiral direction, respectively. The heat exchanger has a large heat exchange capacity and high heat exchange efficiency.

Description

Technical Field

[0001] The present application relates to the field of heat exchange, and in particular to a spiral heat exchanger. Background Art

[0002] Heat exchangers are devices that transfer heat from hot fluids to cold fluids. Heat exchangers are important in life and industrial production. Traditional heat exchangers generally occupy a large area due to the pursuit of a larger heat exchange area, so they have disadvantages such as high installation space requirements and inconvenient maintenance. Therefore, how to reduce the size of the heat exchanger while ensuring sufficient heat exchange area is an urgent problem to be solved in the industry.

[0003] The Chinese utility model patent with patent number CN201520085162.X discloses a novel spiral plate reaction heat exchanger, comprising a first thin plate, a second thin plate, a middle partition and an outer cylinder, wherein the first thin plate and the second thin plate are interlaced and wound to form a double spiral cylinder, the middle partition is respectively connected to the ends of the first thin plate and the second thin plate near the center of the spiral, and the double spiral cylinder is divided into two spaces that do not interfere with each other, one of which is a hot fluid channel (hot medium entry chamber) for running hot fluid, and the other space is a cold fluid channel (cold medium entry chamber) for running cold fluid, the hot fluid channel and the cold fluid channel are distributed at intervals, and the hot fluid channel and the cold fluid channel are respectively provided with a hot fluid inlet and a cold fluid outlet at the positions near the center of the spiral, and the hot fluid channel and the cold fluid channel are respectively provided with a hot fluid outlet and a cold fluid inlet at the outermost positions, when heat exchange is performed, the surface areas of the first thin plate and the second thin plate are both the heat exchange areas of the hot and cold fluids, ensuring sufficient heat exchange area, and at the same time, the setting of the double spiral cylinder can effectively reduce the volume of the heat exchanger. However, the spiral plate reaction heat exchanger in the patent document has the following disadvantages:

[0004] 1. Large flow resistance. The hot fluid and the cold fluid move in the hot fluid flow channel and the cold fluid flow channel respectively over a long distance in the spiral curling direction. During the movement, the movement direction of the fluid is constantly changing, and a large interaction force will be generated between the thin plate and the heat exchange fluid, which makes the flow resistance of the fluid in the flow channel large, and is not suitable for heat exchange of gaseous fluids.

[0005] 2. High maintenance frequency. Although the hot fluid flow channel is in a spiral curled shape, it is actually still a space, that is, the hot fluid is transported in a single flow channel, and the cold fluid flow channel is the same. Taking the hot fluid flow channel as an example, the problem with a single flow channel is that if a certain position of the hot fluid flow channel is blocked, it will affect the transportation of the hot fluid in the entire hot fluid flow channel. In severe cases, it will directly cause the hot fluid to be unable to be transported, making the heat exchanger unable to work normally. That is, as long as there is a blockage in one position of the hot fluid flow channel, the staff will need to maintain the heat exchanger, and the maintenance frequency is high.

[0006] 3. This type of heat exchanger is a multi-layer spiral winding structure. In order to achieve sufficient heat exchange and obtain higher heat exchange efficiency, the structure is usually wound in multiple layers, which makes the radial dimension too large. When the heat exchanger is installed, a larger radial space is required for installing the heat exchanger. This makes it impossible to achieve concealed installation of the heat exchanger in some occasions where the radial space is limited.

[0007] 4. As mentioned above, in order to achieve sufficient heat exchange and obtain higher heat exchange efficiency, the structure is usually wound in multiple layers to increase the internal fluid movement stroke. Due to the spiral flow channel, the internal resistance is large, so when blockage occurs, it is extremely difficult to clean out the blockage.

[0008] 5. The heat exchanger has a single-channel structure. In actual application, the cold fluid and the hot fluid have only one channel respectively. The fluid volume is small, resulting in small heat exchange and insufficient heat exchange capacity (heating or cooling capacity). 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 of the same size will be greatly reduced, which is a waste of money.

[0009] This application arises from this. Summary of the invention

[0010] The technical problem to be solved by the present application is: in view of the above problems, a spiral heat exchanger with large heat exchange capacity and high heat exchange efficiency is proposed.

[0011] The technical solution of this application is:

[0012] A spiral heat exchanger, comprising:

[0013] A mandrel with its axis extending left and right, and

[0014] A liquid-carrying tape spirally wound around the outer periphery of the core shaft for at least 2 turns and having a spiral liquid channel therein;

[0015] The liquid flow belts of any two adjacent circles are separated by a certain distance, thereby forming a spiral liquid flow channel that runs through from left to right. The liquid flow belt is provided with liquid channel dividing strips extending from left to right. The liquid channel dividing strips divide the spiral liquid channel into a plurality of liquid flow branches that are arranged in sequence along the spiral direction and isolated from each other. Each of the liquid flow branches is provided with a first liquid inlet and outlet interface and a second liquid inlet and outlet interface that are interconnected through the liquid flow branch at the inner end and the outer end in the spiral direction.

[0016] Based on the above technical solutions, this application also includes the following preferred solutions:

[0017] The length of each of the liquid flow channels is equal.

[0018] At least two liquid channel dividing strips are provided, and the liquid channel dividing strips are arranged at intervals along a straight line direction.

[0019] Each of the liquid channel dividing strips is arranged in a straight line along the radial direction of the core shaft.

[0020] Each first inlet and outlet liquid interface is arranged at the inner end of the liquid flow channel and is arranged in a straight line along the radial direction of the core shaft; each first inlet and outlet liquid interface is arranged at the outer end of the liquid flow channel and is arranged in a straight line along the radial direction of the core shaft.

[0021] The liquid conveying belt comprises two heat-conducting thin belts arranged in parallel and a liquid sealing strip sealed between the side edges of the two heat-conducting thin belts, and the spiral liquid channel is formed between the liquid sealing strip and the two heat-conducting thin belts.

[0022] At least one of the heat-conducting thin strips is integrally provided with a plurality of stamping protrusions located in the spiral fluid channel and supported between the two heat-conducting thin strips and distributed at intervals.

[0023] The air duct is provided with an air duct support member sandwiched between two adjacent liquid-carrying coils.

[0024] Another spiral heat exchanger proposed in the present application comprises:

[0025] A mandrel with its axis extending left and right, and

[0026] A first liquid-carrying belt spirally wound around the outer periphery of the core shaft for at least 2 turns and having a first spiral liquid channel therein;

[0027] A second liquid-carrying belt spirally wound around the outer periphery of the core shaft for at least 2 turns and having a second spiral liquid channel therein;

[0028] The first liquid-carrying belts of any two adjacent circles are separated by a certain distance, thereby forming a spiral first liquid-carrying flow channel that runs through the left and right; the second liquid-carrying belts of any two adjacent circles are separated by a certain distance, thereby forming a spiral second liquid-carrying flow channel that runs through the left and right; the first liquid-carrying belt is respectively provided with a first liquid inlet and outlet interface and a second liquid inlet and outlet interface that are interconnected through the first spiral liquid channel at the inner end and the outer end in the spiral direction of the first liquid-carrying belt, and the second liquid-carrying belt is respectively provided with a third liquid inlet and outlet interface and a fourth liquid inlet and outlet interface that are interconnected through the second spiral liquid channel at the inner end and the outer end in the spiral direction of the second liquid-carrying belt.

[0029] Preferably, the first liquid conveying belt and the second liquid conveying belt are equal in length.

[0030] Beneficial effects of this application:

[0031] 1. The spiral liquid channel of the liquid flow tape spirally wound outside the core shaft is divided into multiple independent liquid flow channels by the liquid channel separator strips inside. In actual application, each liquid flow channel can flow liquid independently, so that multiple heat exchange liquids can be introduced into the heat exchanger, thereby improving the liquid flow volume and heat exchange capacity of the heat exchanger, overcoming the defects of large flow resistance and small flow rate in single liquid channel heat exchangers. When the length of the liquid flow channel is constant, increasing the number of liquid flow channels will only increase the radial size of the heat exchanger, making full use of the radial size of the heat exchanger to increase the heat exchange, which is very suitable for application environments with sufficient radial space.

[0032] 2. The gas flow channel in the heat exchanger is a spiral flow channel that runs through the left and right sides. The spiral structure is conducive to providing sufficient heat exchange area, but its movement path is from the left end face of the liquid belt to the right end face of the liquid belt. The movement direction is parallel to the plane of the spiral flow channel. The gas flow resistance is small and the gas flow channel is less difficult to clean.

[0033] 3. The spiral liquid channel is divided into multiple independent liquid flow channels, so that the heat exchange time of each liquid flow channel is shortened by reducing the length of each liquid flow channel in the spiral direction, so that the temperature difference of each liquid flow channel in the spiral direction becomes smaller, the heat exchange of the air in the flow channel is more uniform, and the temperature distribution of the air output at the output end of the flow channel is more uniform.

[0034] 4. The liquid inlet and outlet interfaces of a single heat exchanger are arranged on both sides of the heat exchanger in the axial direction and extend in the axial direction, so that the liquid inlet and outlet interfaces are always located within the radial range of the heat exchanger, which does not increase the installation space required for the heat exchanger in the radial direction, and is also conducive to the axial connection of multiple heat exchangers. When multiple heat exchangers of this structure are connected in series in the axial direction to form a larger heat exchange device, the heat exchanged gas flows in the axial direction of the heat exchange device, and the liquid in each single heat exchanger flows in reverse spirals in the axial arrangement direction, so that the device has uniform discharge temperature and exhaust temperature at the same time, which is particularly suitable for applications that have high requirements for the uniformity of discharge temperature or exhaust temperature.

[0035] 5. Multiple heat exchangers of this structure can be infinitely connected and expanded in series along the axial direction, so as to "extract" as much heat or cold as possible from the heat exchange liquid, thereby making the air temperature discharged from the heat exchange device infinitely close to the inlet temperature of the heat exchange liquid, and the expanded heat exchange device will not occupy radial space in the environment. Of course, this method can also "extract" as much heat or cold as possible from the heat exchange gas, thereby making the liquid flow temperature discharged from the heat exchange device infinitely close to the inlet temperature of the heat exchange gas.

[0036] 6. The heat exchange efficiency of a heat exchange device composed of multiple single heat exchangers is determined by the total number of single heat exchangers. Therefore, the heat exchange efficiency of each single heat exchanger itself is reduced. Therefore, the number of winding circles of the coiled tape of the single heat exchanger can be appropriately reduced during production. In this way, due to the small single radial dimension, multiple heat exchangers are connected in series along the axial direction to form a tubular heat exchange device, which can be concealedly installed in the corners of the wall without providing a special installation space for installation.

[0037] 7. The number of windings of the coil on a single heat exchanger is small, which means that the spiral fluid movement stroke in the coil is short. Compared with the background technology, when a blockage occurs, it is easier to clean the blockage along the spiral direction. Even if a single heat exchanger in the heat exchange device is blocked, the blocked single heat exchanger can be removed and replaced with a spare heat exchanger that can be used normally to continue working, so as not to affect the normal use of the heat exchange device.

[0038] 8. The core shaft can not only support the outer spiral winding belt, but also be provided with an axial through hole inside to string a tie rod with nuts on both ends, so that multiple single heat exchangers can be axially tightened and fixed by the tie rod, thereby improving the assembly convenience and structural integrity of the heat exchange device. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present application, rather than limiting the present application.

[0040] Figure 1 It is a schematic diagram of the three-dimensional structure of the heat exchanger in Example 1 of the present application, used to show the left end surface.

[0041] Figure 2 It is a schematic diagram of the three-dimensional structure of the heat exchanger in Example 1 of the present application, used to show the right end surface.

[0042] Figure 3 It is a schematic diagram of the left end surface of the heat exchanger in Example 1 of the present application after the outer shell is removed.

[0043] Figure 4 It is a schematic diagram of the right end surface of the heat exchanger in Example 1 of the present application after the outer shell is removed.

[0044] Figure 5 yes Figure 3 The enlarged view at X1 in the middle is used to show the structure at the left end of the liquid belt.

[0045] Figure 6 yes Figure 5 Schematic diagram of the structure after the middle sealing liquid strip is removed, used to show the internal structure of the liquid-carrying belt. Figure 7 It is a simplified structural diagram of the heat exchange device in Example 1 of the present application.

[0046] Figure 8 It is a schematic diagram of the left end surface of the heat exchanger in Example 2 of the present application after the outer shell is removed.

[0047] Fig. 9 It is a schematic diagram of the right end surface of the heat exchanger in Example 2 of the present application after the outer shell is removed.

[0048] Fig.10 It is a schematic diagram of the left end surface of the heat exchanger in Example 3 of the present application after the outer shell is removed.

[0049] Fig.11 It is a schematic diagram of the right end surface of the heat exchanger in Example 3 of the present application after the outer shell is removed.

[0050] in:

[0051] 1- mandrel, 2- liquid conveying belt, 3- air flow channel, 4- first liquid inlet and outlet interface, 5- second liquid inlet and outlet interface, 6- ventilation pipe, 7- shell;

[0052] 101 - axial through hole, 201 - spiral liquid channel, 201a - liquid flow channel, 202 - heat conductive thin strip, 202a - stamping protrusion, 202b - arc-shaped bending part, 203 - liquid sealing strip, 204 - liquid channel dividing strip. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme of the embodiment of the present application will be clearly and completely described in conjunction with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0054] Unless otherwise defined, the technical terms or scientific terms used herein shall have the common meanings understood by persons with ordinary skills in the field to which this application belongs. The words "one" or "an" and the like used in the patent application specification and claims of this application do not indicate a quantity limitation, but indicate the existence of at least one.

[0055] In the description of the specification and claims of this application, the terms "upper", "lower", "horizontal", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the present application.

[0056] Now, specific embodiments of the present application are described with reference to the accompanying drawings.

[0057] Embodiment 1:

[0058] Figures 1 to 6 The first specific embodiment of the spiral heat exchanger is shown, which is mainly composed of a core shaft 1 and a liquid-carrying belt 2. The liquid-carrying belt 2 is spirally wound around the core shaft 1, and the number of windings of the liquid-carrying belt 2 is ten, so that a spiral liquid channel 201 with ten spiral layers is formed in the liquid-carrying belt 2. In order to more conveniently describe the specific structure of the spiral heat exchanger, the length direction of the core shaft 1 is now defined as the left-right direction, that is, the axis of the core shaft 1 extends left and right (extends from left to right).

[0059] In this embodiment, any two adjacent layers of liquid-carrying tapes 2 are separated by a certain distance, thereby forming a spiral air-carrying passage 3 that passes through from side to side. In order to prevent the liquid-carrying tapes 2 of adjacent layers from sticking to each other, thereby causing the air-carrying passage 3 to be blocked, in this embodiment, an air-carrying passage support member sandwiched between the liquid-carrying tapes 2 of two adjacent layers is provided in the air-carrying passage 3.

[0060] The air duct support member is a plurality of ventilation tubes 6 parallel to the core shaft 1, and each ventilation tube 6 is closely arranged along the spiral direction of the air flow channel 3. To prevent the ventilation tube 6 from moving, it is best to bond the ventilation tube 6 to the liquid flow belt 2. The ventilation tube 6 is preferably an aluminum tube with excellent thermal conductivity and easy to manufacture.

[0061] Refer to Figure 1 and Figure 2 As shown, a liquid channel dividing strip 204 extending left and right (i.e. extending parallel to the core axis) is provided in the liquid flow belt 2. This liquid channel dividing strip 204 divides the spiral liquid channel 201 into two liquid flow channels 201a isolated from each other, and the two liquid flow channels 201a are arranged in sequence in the spiral direction. Each liquid flow channel 201a is provided with a first liquid inlet and outlet interface 4 at the inner end in the spiral direction, and a second liquid inlet and outlet interface 5 at the outer end in the spiral direction. Each liquid flow channel 201a has a first liquid inlet and outlet interface 4 and a second liquid inlet and outlet interface 5 at both ends. In actual application, the liquids respectively fed into the two first liquid inlet and outlet interfaces 4 will flow to the two second liquid inlet and outlet interfaces 5 along the spiral direction (i.e. the length direction) of the corresponding liquid flow channels 201a, so that two heat exchange liquids can be introduced into the heat exchanger, thereby improving the liquid flow volume and heat exchange capacity of the heat exchanger, and overcoming the defects of large flow resistance and small flow rate in single liquid channel heat exchangers.

[0062] The above-mentioned heat exchanger has the following disadvantages: if the first inlet and outlet liquid interface 4 at the inner end of each liquid flow channel 201a is the liquid inlet, and the second inlet and outlet liquid interface 5 is the liquid outlet, the liquid fed into the liquid flow belt is a low-temperature liquid lower than the air temperature in the ventilation pipe. Since the liquid flows from the inside to the outside in the liquid flow belt 2, and continuously absorbs the heat of the gas in the ventilation pipe during the flow process, the liquid flow temperature in the liquid flow belt 2 increases from the inside to the outside. After the gas enters the flow channel 3 from one side of the heat exchanger axis, the liquid flow belt temperature contacted by the gas at different positions is different - the liquid flow belt temperature contacted by the outer gas is higher than the liquid flow belt temperature contacted by the inner gas, which results in that the gas temperature discharged from the other side of the heat exchanger axis is uneven, and cannot be used in those applications that have high requirements for the temperature uniformity of the target gas.

[0063] Based on this, we can combine multiple spiral heat exchangers of the above structure into Figure 7 The methods shown are used in combination to form a heat exchange device capable of evenly discharging air. Figure 7 In the embodiment, the core shafts 1 of the spiral heat exchangers of the above structure are arranged coaxially, and the corresponding inlet and outlet liquid interfaces of any two adjacent spiral heat exchangers are connected to each other. Figure 7 The four spiral heat exchangers are called the first heat exchanger, the second heat exchanger, the third heat exchanger and the fourth heat exchanger from left to right. The two second inlet and outlet liquid interfaces 5 at the right end of the first heat exchanger are connected to the two second inlet and outlet liquid interfaces 5 at the left end of the second spiral heat exchanger, the two first inlet and outlet liquid interfaces 4 at the right end of the second heat exchanger are connected to the two first inlet and outlet liquid interfaces 4 at the left end of the third spiral heat exchanger, and the two second inlet and outlet liquid interfaces 5 at the right end of the third heat exchanger are connected to the two second inlet and outlet liquid interfaces 5 at the left end of the fourth spiral heat exchanger.

[0064] Through the above analysis, we already know that if the low-temperature liquid used for cooling flows from the inside to the outside in the spiral heat exchanger, the liquid temperature at the outer end is higher than the liquid temperature at the inner end. Obviously, if the low-temperature liquid flows from the outside to the inside in the spiral heat exchanger, the liquid temperature at the inner end is higher than the liquid temperature at the outer end. Figure 7 In the first heat exchanger, the heat exchange liquid flows from the inside to the outside, the liquid temperature on the outside of the first heat exchanger is higher than the liquid temperature on the inside, and the heat release intensity of the air inside the first heat exchanger is greater than that of the surrounding air. In the second heat exchanger, the heat exchange liquid flows from the outside to the inside, the liquid temperature on the outside of the second heat exchanger is lower than the liquid temperature on the inside, and the heat release intensity of the air inside the second heat exchanger is lower than that of the surrounding air. In the third heat exchanger, the heat exchange liquid flows from the inside to the outside, the liquid temperature on the outside of the third heat exchanger is higher than the liquid temperature on the inside, and the heat release intensity of the air inside the third heat exchanger is greater than that of the surrounding air. In the fourth heat exchanger, the heat exchange liquid flows from the outside to the inside, the liquid temperature on the outside of the fourth heat exchanger is lower than the liquid temperature on the inside, and the heat release intensity of the air inside the fourth heat exchanger is lower than that of the surrounding air. So when the air is in Figure 7The air flows through the fourth, third, second and first heat exchangers from right to left in sequence, and the target air with relatively uniform temperature can be obtained, which is very suitable for air conditioning systems.

[0065] It is not difficult to understand that if the sizes and structures of the above four heat exchangers are exactly the same, the four can be easily connected according to Figure 7 The heat exchangers are assembled together in the manner shown, and after the assembly is completed, the heat exchangers are arranged neatly and flush.

[0066] In order to more conveniently connect the four heat exchangers tightly together, the core shaft 1 of each heat exchanger in this embodiment adopts a hollow tube structure with an axial through hole 101, and a tie rod with external threads at both ends is passed through the axial through hole 101, and a locking nut is threadedly connected to the two ends of the tie rod, so that each spiral heat exchanger is axially clamped and fixed by means of the tie rod and the two locking nuts.

[0067] Figures 3 to 6 In the embodiment, each heat exchanger comprises a cylindrical shell 7 coaxially arranged on the periphery of the spiral coil 2. In order to minimize the axial gap between two adjacent heat exchangers to reduce gas leakage, in this embodiment, the cylindrical shells 7 of any two adjacent heat exchangers are sealed and abutted.

[0068] Considering that in actual application, the gas axially introduced into the heat exchanger at each inlet position of the gas flow channel 3 usually has a consistent inlet temperature, and the liquid sent into the above two liquid flow channels 201a usually has a consistent inlet temperature, and the outlet temperature of the two liquid flows mainly depends on the length of the liquid channel. Therefore, in this embodiment, the lengths of the two liquid flow channels 201a are set to be equal, so that the outlet temperatures of the two liquid flows are close, and thus the outlet temperatures of the "two channels" of gas that exchange heat with the two liquid flows are also close.

[0069] like Figure 5 and Figure 6 As shown, the liquid transport belt 2 in this embodiment includes two parallel thermal conductive thin strips 202 and a liquid sealing strip 203 sealed between the sides of the two thermal conductive thin strips. The spiral liquid channel 201 is formed between the aforementioned liquid sealing strip and the two thermal conductive thin strips.

[0070] It is not difficult to understand that the above-mentioned sealing liquid strip 203 can not only seal the liquid channel to prevent the liquid flow from leaking out, but also support the two thermally conductive thin strips 202 of the liquid flow tape 2 to ensure that the two thermally conductive thin strips 202 are separated by a certain distance to form a liquid flow channel. However, the support strength and support area of ​​the sealing liquid strip 203 for the two thermally conductive thin strips 202 are limited. If the axial width of the liquid flow tape 2 is large, it is easy to cause the two thermally conductive thin strips 202 to be close to each other and the flow channel to be blocked. Based on this, in this embodiment, many spaced stamping protrusions 202a located in the spiral liquid channel 201 and supported between the two thermally conductive thin strips 202 are integrally provided on one of the thermally conductive thin strips 202. The two thermally conductive thin strips 202 are further supported by the densely distributed stamping protrusions 202a, thereby ensuring that the spiral liquid channel structure is stable and not easy to collapse and block.

[0071] Embodiment 2:

[0072] Figure 8 and Fig. 9 A second specific embodiment of a spiral heat exchanger is shown, which has a similar structure to the first embodiment, except that:

[0073] There are not just one but many liquid channel dividing strips 204 arranged in the liquid flow belt 2. The length of each liquid channel dividing strip 204 extends left and right, and these liquid channel dividing strips 204 are arranged at intervals along the spiral direction of the liquid flow belt 2. These liquid channel dividing strips 204 divide the spiral liquid channel 201 into a plurality of liquid flow channels 201a that are arranged in sequence along the spiral direction of the liquid flow belt 2 and isolated from each other. Each liquid flow channel 201a is provided with a first liquid inlet and outlet interface 4 at the inner end in the spiral direction (i.e., the length direction), and each liquid flow channel 201a is provided with a second liquid inlet and outlet interface 5 at the outer end in the spiral direction. Each of the liquid flow channels is connected to each other at the first liquid inlet and outlet interface 4 and the second liquid inlet and outlet interface 5 at both ends of its length.

[0074] In actual application, the liquid sent to each first inlet and outlet liquid interface 4 will flow along the length direction of the corresponding liquid flow channel 201a to the corresponding second inlet and outlet liquid interface 5. In this way, multiple heat exchange liquids can be introduced into the heat exchanger at the same time, thereby further improving the liquid flow and heat exchange capacity of the heat exchanger.

[0075] Obviously, the heat exchanger of this embodiment also has the problem of uneven outlet temperature when used alone. Figure 7 In the manner shown, a plurality of spiral heat exchangers of this structure are combined and used together - the first liquid inlet and outlet interfaces 4 or the second liquid inlet and outlet interfaces 5 of two adjacent spiral heat exchangers are butted against each other.

[0076] Embodiment three:

[0077] Fig.10 and Fig.11 The third specific embodiment of the spiral heat exchanger is shown, which has a similar structure to the first embodiment, except that:

[0078] The heat exchanger of the present application is equipped with a total of two liquid flow tapes, one of which is spirally wound around the outer periphery of the core shaft 1, and the number of turns is about 7. The other liquid flow tape 2 is spirally wound around the outer periphery of the first liquid flow tape 2, and the number of turns is about 3. For the convenience of description, the inner liquid flow tape 2 is referred to as the first liquid flow tape, and the spiral liquid channel 201 formed therein is referred to as the first spiral liquid channel; the outer liquid flow tape 2 is referred to as the second liquid flow tape, and the spiral liquid channel 201 formed therein is referred to as the second spiral liquid channel. The first liquid flow tapes of any two adjacent layers are separated by a certain distance, thereby forming a spiral flow channel 3 that runs through the left and right. The second liquid flow tapes of any two adjacent layers are separated by a certain distance, thereby forming another spiral flow channel 3 that runs through the left and right.

[0079] The first spiral liquid channel and the second spiral liquid channel are provided with an inlet and outlet liquid interface at the inner and outer ends of their respective spiral directions (i.e., the length direction). For the convenience of explanation, the inlet and outlet liquid interface provided at the inner ends of the spirals of the first spiral liquid channel and the second spiral liquid channel is called the first inlet and outlet liquid interface 4, and the inlet and outlet liquid interface provided at the outer ends of the spirals of the first spiral liquid channel and the second spiral liquid channel is called the second inlet and outlet liquid interface 5. The heat exchanger has two first inlet and outlet liquid interfaces 4 and two second inlet and outlet liquid interfaces 5. In actual application, one path of heat exchange liquid can be respectively introduced into the two liquid flow coils, and the two paths of heat exchange liquid flow separately, thereby improving the liquid flow volume and heat exchange capacity of the heat exchanger, overcoming the defects of large flow resistance and small flow rate of the single liquid path heat exchanger.

[0080] In this embodiment, the lengths of the first liquid flow belt and the second liquid flow belt are equal, so that the outflow temperatures of the two liquid flows are close, and thus the outflow temperatures of the "two paths" of gas that exchange heat with the two liquid flows are also close.

[0081] Obviously, the heat exchanger of this embodiment also has the problem of uneven outlet temperature when used alone. Figure 7 In the manner shown, a plurality of spiral heat exchangers of this structure are combined and used together - the first liquid inlet and outlet interfaces 4 or the second liquid inlet and outlet interfaces 5 of two adjacent spiral heat exchangers are butted against each other.

[0082] In the above three embodiments, the liquid conveying tape 2 is wound around the core shaft 1 in a circular spiral shape, that is, the liquid conveying tape 2 is in a circular spiral shape, and a heat exchanger of this shape is easier to process and manufacture. In some other embodiments of the present application, the liquid conveying tape 2 is in a non-circular spiral shape, that is, the liquid conveying tape 2 can also be wound around the core shaft 1 in a non-circular spiral shape. Generally speaking, the aforementioned non-circular spiral is preferably an elliptical spiral. A heat exchanger of this shape has a flat appearance and is more beautiful, 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.

Claims

1. A spiral heat exchanger, characterized in that: include: A core shaft (1) with its axis extending left and right, and A liquid conveying tape (2) spirally wound around the outer periphery of the core shaft (1) for at least two turns and having a spiral liquid channel (201) therein; Any two adjacent layers of the liquid-carrying coils (2) are separated by a certain distance, thereby forming a spiral-shaped air-carrying channel (3) that runs through the left and right sides. The air-carrying channel (3) is provided with an air-channel support member. The liquid-carrying coils (2) are provided with liquid channel dividing strips (204) extending left and right. The liquid channel dividing strips (204) divide the spiral liquid channel (201) into a plurality of liquid flow channels (201a) that are sequentially arranged along the spiral direction and isolated from each other. Each of the liquid flow channels (201a) is provided with a first liquid inlet and outlet interface (4) and a second liquid inlet and outlet interface (5) that are interconnected through the liquid flow channel at its inner and outer ends in the spiral direction. The liquid conveying belt (2) comprises two heat-conducting thin belts (202) arranged in parallel and a liquid sealing strip (203) sealed between the side edges of the two heat-conducting thin belts, and the spiral liquid channel (201) is formed between the liquid sealing strip and the two heat-conducting thin belts.

2. The spiral heat exchanger according to claim 1, characterized in that: The length of each of the liquid flow channels (201a) is equal.

3. The spiral heat exchanger according to claim 1, characterized in that: At least two of the liquid channel dividing strips (204) are provided, and the liquid channel dividing strips (204) are arranged at intervals along a straight line direction.

4. The spiral heat exchanger according to claim 3, characterized in that: Each of the liquid channel dividing strips (204) is arranged in a straight line along the radial direction of the core shaft (1).

5. The spiral heat exchanger according to claim 3, characterized in that: Each first liquid inlet and outlet interface (4) is arranged at the inner end of the liquid flow channel (201a), and is arranged in a straight line along the radial direction of the core shaft (1); each first liquid inlet and outlet interface (4) is arranged at the outer end of the liquid flow channel (201a), and is arranged in a straight line along the radial direction of the core shaft (1).

6. The spiral heat exchanger according to claim 1, characterized in that: At least one of the heat-conducting thin strips (202) is integrally provided with a plurality of stamping protrusions (202a) located in the spiral liquid channel (201) and supported between the two heat-conducting thin strips (202) and distributed at intervals.

7. The spiral heat exchanger according to claim 1, characterized in that: The air flow channel (3) is provided with an air channel support member sandwiched between two adjacent layers of liquid flow coils (2).

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