A heat exchange plate and photovoltaic thermal composite system

Abstract

The present application provides a heat exchange plate and a photovoltaic-thermal composite system, wherein the heat exchange plate comprises an inlet, an inflow area connected to the inlet, a first heat exchange area, a turning area, a second heat exchange area, an outflow area, and an outlet connected to the outflow area, wherein the fluid flows through the inlet in sequence through the inflow area, the first heat exchange area, the turning area, the second heat exchange area, the outflow area to the outlet; the distribution density of the heat exchange channels in the inflow area is less than that in the first heat exchange area, and the distribution density of the heat exchange channels in the second heat exchange area is greater than that in the outflow area; the inlet and the outlet are arranged on the same side of the heat exchange plate. The present application can improve the heat exchange uniformity and heat exchange efficiency of the heat exchange plate and reduce the power consumption of the heat exchange plate.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular to a heat exchange plate and a photovoltaic-thermal composite system. Background Art

[0002] With the continuous development of photovoltaic technology, photovoltaic-thermal composite system is a new technology that integrates photovoltaic system and photothermal system developed in recent years. Photothermal composite system usually uses heat exchange device to exchange heat of photovoltaic panels, so as to achieve heat collection. Traditional heat exchange devices such as serpentine coils have high power consumption and poor heat exchange uniformity. Summary of the invention

[0003] The present application provides a heat exchange plate and a photovoltaic-thermal composite system, which can improve the heat exchange uniformity and heat exchange efficiency of the heat exchange plate and reduce the power consumption of the heat exchange plate.

[0004] In order to solve the above technical problems, the present application provides a heat exchange plate, which includes an inlet, an inlet area connected to the inlet, a first heat exchange area, a turning area, a second heat exchange area, an outflow area, and an outlet connected to the outflow area. The fluid flows through the inlet in sequence through the inlet, the inlet area, the first heat exchange area, the turning area, the second heat exchange area, the outflow area to the outlet; the distribution density of the heat exchange channels in the inlet area is smaller than the distribution density of the heat exchange channels in the first heat exchange area, and the distribution density of the heat exchange channels in the second heat exchange area is greater than the distribution density of the heat exchange channels in the outflow area; the inlet and the outlet are arranged on the same side of the heat exchange plate.

[0005] In order to solve the above technical problems, the present application further provides a photovoltaic-thermal composite system, which includes a photovoltaic panel and the above heat exchange plate.

[0006] The beneficial effects of the present application are as follows: the inlet and outlet of the heat exchange plate of the present application are arranged on the same side, which is convenient for assembling the inlet and outlet of the heat exchange tube, and is convenient for reducing the size of the heat exchange plate in the direction in which the inlet points to the turning zone; further, since the inlet and outlet are arranged on the same side, it is convenient to increase the size of the first heat exchange zone and the second heat exchange zone in the direction in which the inlet points to the turning zone, thereby facilitating the increase of the heat exchange area of ​​the first heat exchange zone and the second heat exchange zone where the heat exchange channel distribution density is larger, thereby improving the heat exchange efficiency and heat exchange uniformity of the heat exchange plate; further, the distribution density of the heat exchange channel in the inlet zone is smaller than the distribution density of the heat exchange channel in the first heat exchange zone, which can make the fluid enter the first heat exchange zone from the inlet zone in an adaptive manner. Divert to the heat exchange channel of the first heat exchange zone, thereby making the fluid more uniform. It covers more areas of the first heat exchange zone, and can reduce the flow resistance during the flow of the fluid, improve the flow uniformity and distribution uniformity of the fluid, and then improve the heat exchange uniformity of the heat exchange plate; further, the distribution density of the heat exchange channel in the second heat exchange zone is greater than the distribution density of the heat exchange channel in the outflow zone. When the fluid flows from the second heat exchange zone to the outflow zone, it can form a collection effect in an adaptive manner, which is convenient for the fluid to flow out of the heat exchange plate and can reduce the flow resistance during the flow of the fluid; further, in this embodiment, the fluid flows through the inlet in turn through the inlet zone, the first heat exchange zone, the turning zone, the second heat exchange zone, the outflow zone to the outlet, which can reduce the frequent large-angle turning of the fluid in the heat exchange pipe and produce a large pressure drop, thereby reducing the power consumption of the heat exchange plate. Therefore, this embodiment can improve the heat exchange uniformity and heat exchange efficiency of the heat exchange plate and reduce the power consumption of the heat exchange plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0008] Figure 1 It is a structural schematic diagram of an embodiment of a heat exchange plate of the present application;

[0009] Figure 2 It is a structural schematic diagram of another embodiment of the heat exchange plate of the present application;

[0010] Figure 3 This is a schematic diagram of the bionic structure of human blood vessels;

[0011] Figure 4 It is a schematic diagram of the simulation results of the first diversion island of the present application;

[0012] Figure 5 This is a schematic diagram of the partial structure of fish gills. DETAILED DESCRIPTION

[0013] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0014] The terms "first", "second" and the like in this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. It should be understood that when used in this specification and the appended claims, the term "including" indicates the presence of the described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections. It should also be understood that the terms used in this specification of the application are only for the purpose of describing a specific embodiment and are not intended to limit the application. As used in this specification of the application and the appended claims, unless the context clearly indicates otherwise, the singular forms of "one", "an" and "the" are intended to include plural forms. It should also be further understood that the term "and / or" used in this specification of the application and the appended claims refers to any combination of one or more of the items listed in association and all possible combinations, and includes these combinations.

[0015] It should be noted that when a certain element is fixed to another element, it includes directly fixing the element to the other element, or fixing the element to the other element through at least one other element in the middle. When an element is connected to another element, it includes directly connecting the element to the other element, or connecting the element to the other element through at least one other element in the middle.

[0016] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0017] This application first proposes a heat exchange plate, such as Figures 1 to 5 As shown, Figure 1 It is a structural schematic diagram of an embodiment of a heat exchange plate of the present application; Figure 2 It is a structural schematic diagram of another embodiment of the heat exchange plate of the present application; Figure 3 This is a schematic diagram of the bionic structure of human blood vessels; Figure 4 It is a schematic diagram of the simulation results of the first diversion island of the present application; Figure 5 It is a partial structural diagram of a fish gill. The heat exchange plate includes an inlet 100, an inflow area 101 connected to the inlet 100, a first heat exchange area 102, a turning area 103, a second heat exchange area 104, an outflow area 105, and an outlet 200 connected to the outflow area 105. The fluid passes through the inlet 100 and flows through the inflow area 101, the first heat exchange area 102, the turning area 103, the second heat exchange area 104, the outflow area 105 to the outlet 200 in sequence; the distribution density of the heat exchange channels in the inflow area 101 is less than the distribution density of the heat exchange channels in the first heat exchange area 102, and the distribution density of the heat exchange channels in the second heat exchange area 104 is greater than the distribution density of the heat exchange channels in the outflow area 105; the inlet 100 and the outlet 200 are arranged on the same side of the heat exchange plate.

[0018] The distribution density refers to the number of heat exchange channels per unit volume. From the inlet area 101 to the first heat exchange area 102, the distribution density of the heat exchange channels increases, forming a diversion effect; from the second heat exchange area 104 to the outlet area 105, the distribution density of the heat exchange channels decreases, forming a collection effect. The fluid enters the heat exchange plate through the inlet 100, and flows through the inlet area 101, the first heat exchange area 102, and the turning area 103 in the heat exchange plate in sequence, and completes the turning in the turning area 103, and then flows through the second heat exchange area 104 and the outlet area 105 in sequence, and then flows out through the outlet 200 set on the same side as the inlet 100. The fluid is a heat exchange medium. The fluid flows in the heat exchange channel of the heat exchange plate to exchange heat with the heat exchange plate, so that the heat exchange plate can achieve heat collection or heat dissipation functions.

[0019] For example, in one application scenario, the heat exchange channels in the first heat exchange zone 102 are more densely distributed. Through the design of the heat exchange tubes, the high-speed incident fluid can be quickly diverted to the heat exchange channels of the first heat exchange zone 102 in an adaptive manner when entering the first heat exchange zone 102 from the inlet zone 101, so that the fluid can cover more areas of the first heat exchange zone 102 more evenly. In this case, the contact area between the fluid and the first heat exchange zone 102 can be increased, and then a better heat exchange effect can be achieved, and then the heat exchange efficiency of the heat exchange plate can be improved; the distribution density of the heat exchange channels of the second heat exchange zone 104 is greater than the distribution density of the heat exchange channels of the outlet zone 105, and when the fluid flows from the second heat exchange zone 104 to the outlet zone 105, a collecting effect is formed.

[0020] Compared with traditional heat exchange devices such as serpentine-wound heat exchange tubes, this arrangement can reduce the flow resistance of the fluid in the process of flowing through the heat exchange plate, improve the flow uniformity and fluid distribution uniformity. For example, in a heat exchange device with a large heat exchange area, the heat exchange plate of this embodiment only needs to set a turning area 103 to realize the turning of the fluid, which can reduce the large pressure loss problem that may occur in the design scheme of frequently turning the heat exchange channel to improve the uniformity of fluid distribution, thereby reducing the power consumption of the heat exchange plate.

[0021] Therefore, the beneficial effect of the above arrangement of the present embodiment is that the inlet 100 and the outlet 200 of the heat exchange plate are arranged on the same side, which is convenient for assembling the inlet 100 and the outlet 200 of the heat exchange tube, and is convenient for reducing the size of the heat exchange plate in the direction from the inlet 100 to the turning zone 103; further, since the inlet 100 and the outlet 200 are arranged on the same side, it is convenient to increase the size of the first heat exchange zone 102 and the second heat exchange zone 104 in the direction from the inlet 100 to the turning zone 103, so it is convenient to increase the heat exchange area of ​​the first heat exchange zone 102 and the second heat exchange zone 104 with a larger distribution density of the heat exchange channels, thereby improving the heat exchange efficiency and heat exchange uniformity of the heat exchange plate; further, the distribution density of the heat exchange channels of the inlet zone 101 is less than the distribution density of the heat exchange channels of the first heat exchange zone 102, so that the fluid can be diverted to the heat exchange channels of the first heat exchange zone 102 in an adaptive manner when entering the first heat exchange zone 102 from the inlet zone 101, Therefore, the fluid can cover more areas of the first heat exchange zone 102 more evenly, and can reduce the flow resistance during the flow of the fluid, improve the flow uniformity and distribution uniformity of the fluid, and then improve the heat exchange uniformity of the heat exchange plate; further, the distribution density of the heat exchange channel of the second heat exchange zone 104 is greater than the distribution density of the heat exchange channel of the outflow zone 105. When the fluid flows from the second heat exchange zone 104 to the outflow zone 105, the fluid can form a collection effect in an adaptive manner, which is convenient for the fluid to flow out of the heat exchange plate and can reduce the flow resistance during the flow of the fluid; further, in this embodiment, the fluid flows through the inlet 100 in sequence through the inlet zone 101, the first heat exchange zone 102, the turning zone 103, the second heat exchange zone 104, the outflow zone 105 to the outlet 200, which can reduce the occurrence of large pressure drops caused by frequent large-angle turns of the fluid in the heat exchange pipe, and thus reduce the power consumption of the heat exchange plate. Therefore, this embodiment can improve the heat exchange uniformity and heat exchange efficiency of the heat exchange plate and reduce the power consumption of the heat exchange plate.

[0022] In some embodiments, the cross-sectional area of ​​the heat exchange channel of the inlet zone 101 is greater than the cross-sectional area of ​​the heat exchange channel of the first heat exchange zone 102 ; the cross-sectional area of ​​the heat exchange channel of the outlet zone 105 is greater than the cross-sectional area of ​​the heat exchange channel of the second heat exchange zone 104 .

[0023] This arrangement reduces the change in flow velocity when the fluid flows from the inlet area 101 into the first heat exchange area 102 for diversion, and reduces the change in flow velocity when the fluid flows from the second heat exchange area 104 into the outlet area 105 for collection, which can maximize the consistency of the fluid flow velocity in the heat exchange plate, reduce the risk of flow interruption or stagnation in some areas of some heat exchange channels in the heat exchange plate, and improve the overall heat exchange efficiency of the heat exchange plate.

[0024] In some embodiments, the cross-sectional area of ​​the heat exchange channel in the inlet area 101 and the cross-sectional area of ​​the heat exchange channel in the outlet area 105 are the same or approximately the same, and the distribution density of the heat exchange channel in the inlet area 101 is equal to the distribution density of the heat exchange channel in the outlet area 105. This arrangement facilitates further improving the consistency of flow velocity of the fluid in various locations in the heat exchange plate, reducing the risk of flow interruption or stagnation in some areas of some heat exchange channels in the heat exchange plate, and improving the overall heat exchange efficiency of the heat exchange plate.

[0025] In some embodiments, similarly, the cross-sectional area of ​​the heat exchange channel of the first heat exchange zone 102 and the cross-sectional area of ​​the heat exchange channel of the second heat exchange zone 104 can be set to be the same or approximately the same, and the distribution density of the heat exchange channel of the first heat exchange zone 102 is equal to the distribution density of the heat exchange channel of the second heat exchange zone 104; further, the area of ​​the first heat exchange zone 102 and the second heat exchange zone 104 can also be set to be equal.

[0026] In some embodiments, see Figure 1 , Figure 2 The first heat exchange zone 102 and the second heat exchange zone 104 are arranged along the first direction x and are arranged in parallel; the inlet 100 and the turning zone 103 are arranged along the second direction y; wherein the first direction x is perpendicular to the second direction y, and the fluid flows from the inlet 100 to the turning zone 103 along the second direction y.

[0027] The first heat exchange zone 102 is connected to the inlet zone 101 and the turning zone 103, and the second heat exchange zone 104 is connected to the outlet zone 105 and the turning zone 103; this arrangement is convenient for production and assembly, and the parallel arrangement is more convenient for reducing the gap between the first heat exchange zone 102 and the second heat exchange zone 104, so it is more convenient to improve the heat exchange efficiency at this gap, and improve the integration and heat exchange uniformity of the heat exchange plate.

[0028] In some embodiments, Figure 1 As shown, the inlet 100 and the turning area 103 are arranged along the second direction y, and the second direction y is perpendicular to the first direction x; wherein, the first heat exchange area 102 and the second heat exchange area 104 both extend along the second direction y and are arranged parallel to the second direction y, so as to improve the simplicity of the overall structure and reduce the production design cost.

[0029] In some embodiments, one side of the turning area 103 connected to the first heat exchange area 102 and the second heat exchange area 104 extends along the first direction x, and the size of the first heat exchange area 102 along the second direction y is equal to the size of the second heat exchange area 104 along the second direction y.

[0030] Specifically, the first heat exchange zone 102 and the second heat exchange zone 104 are arranged on the same side of the turning zone 103, and a side of the turning zone 103 connected to the first heat exchange zone 102 and the second heat exchange zone 104 extends along the first direction x.

[0031] In an application scenario, such as Figure 1 As shown, the inlet 100 and the turning area 103 are arranged along the second direction y, the first direction x is perpendicular to the second direction y, and the size of the first heat exchange area 102 along the second direction y is equal to the size of the second heat exchange area 104 along the second direction y.

[0032] This arrangement is convenient for improving the aesthetics of the overall structure and the convenience of production design, and is convenient for improving the uniformity of the overall heat exchange effect of the heat exchange plate.

[0033] In some embodiments, a size of the inflow region 101 along the second direction y is equal to a size of the outflow region 105 along the second direction y.

[0034] This arrangement is convenient for improving the uniformity of the overall heat exchange effect of the heat exchange plate and for improving the aesthetics of the overall structure.

[0035] In some embodiments, the size of the inlet zone 101 along the first direction x can be set to be equal to the size of the outlet zone 105 along the first direction x, the size of the first heat exchange zone 102 along the first direction x can be equal to the size of the second heat exchange zone 104 along the first direction x, and the size of the turning zone 103 along the first direction x can be greater than or equal to the sum of the size of the first heat exchange zone 102 along the first direction x and the size of the second heat exchange zone 104 along the first direction x, so as to further improve the overall heat exchange uniformity of the heat exchange plate.

[0036] In other embodiments, the first heat exchange zone and the second heat exchange zone may also be arranged in parallel curves and generally extend along the second direction, or the first heat exchange zone and the second heat exchange zone may not be arranged in parallel, which is not specifically limited.

[0037] In some embodiments, see Figure 1 , Figure 2, the size of the first heat exchange zone 102 along the first direction x is greater than or equal to the size of the inlet zone 101 along the first direction x, and along the direction of the inlet 100 pointing to the turning zone 103, the size of the inlet zone 101 along the first direction x increases, for example, it can be increased gradually or in steps (not shown), so as to save materials and achieve a diversion effect; optionally, the size of the inlet zone 101 along the first direction x on one side close to the first heat exchange zone 102 is equal to the size of the first heat exchange zone 102 along the first direction x on one side close to the inlet zone 101.

[0038] In some embodiments, the size of the second heat exchange zone 104 along the first direction x is greater than or equal to the size of the outflow zone 105 along the first direction x, and along the direction of the turning zone 103 pointing to the outlet 200, the size of the outflow zone 105 along the first direction x decreases, for example, it can be gradually reduced or stepped (not shown), so as to save materials while achieving a collecting effect; optionally, the size of the outflow zone 105 on one side close to the second heat exchange zone 104 along the first direction x is equal to the size of the second heat exchange zone 104 on one side close to the outflow zone 105 along the first direction x.

[0039] like Figure 1 , Figure 2 , Figure 3 As shown in the figure, the overall design of the heat exchange channel of the heat exchange plate is inspired by the human blood vessel structure. In the human blood circulation system, blood is shunted from the arteries to the capillaries in an adaptive manner and then reaches various parts of the body. After the blood passes through various tissues of the body, it is collected to the veins through the vascular network structure. The bionic human blood vessel structure can achieve shunting and collecting with lower pressure drop loss.

[0040] In some embodiments, the size of the first heat exchange area 102 along the first direction x is equal to the size of the second heat exchange area 104 along the first direction x. This arrangement has a simple structure, can reduce the complexity of production and assembly, and facilitates improving the flow uniformity of the fluid in the heat exchange plate.

[0041] In some embodiments, the inlet area 101 and the outlet area 105 of the heat exchange plate can also be set to a tree-like structure or a river-like structure. Specifically, in the inlet area 101, in the direction from the inlet 100 to the first heat exchange area 102, the cross-sectional area of ​​the heat exchange channel gradually decreases, the distribution density of the heat exchange channel gradually increases, and the size of the inlet area 101 gradually increases, so as to facilitate flow diversion; in the outlet area 105, in the direction from the second heat exchange area 104 to the outlet 200, the cross-sectional area of ​​the heat exchange channel gradually increases, the distribution density of the heat exchange channel gradually decreases, and the size of the outlet area 105 gradually decreases, so as to facilitate flow collection.

[0042] In some embodiments, Figure 1 , Figure 2As shown, the first heat exchange zone 102 and the second heat exchange zone 104 are both provided with a first diverter island 111, and the first heat exchange zone 102 and the second heat exchange zone 104 are spaced apart to form a gap, and the size of the gap along the first direction x is smaller than the size of the first diverter island 111 in the first heat exchange zone 102 and the second heat exchange zone 104 along the first direction x.

[0043] Specifically, disposing the first flow dividing island 111 can facilitate forming a heat exchange channel in the first heat exchange area 102 or the second heat exchange area 104 .

[0044] The spacing arrangement facilitates production and processing. For example, in one application scenario, the first heat exchange zone 102 and the second heat exchange zone 104 are parallel and spaced along the first direction x; the size of the gap along the first direction x is smaller than the size of the first diverter island 111 in the first heat exchange zone 102 and the second heat exchange zone 104 along the first direction x, which can reduce the gap between the first heat exchange zone 102 and the second heat exchange zone 104. Reducing the gap can not only improve the integration of the heat exchange plate, but also improve the heat exchange performance near the gap, improve the heat exchange performance of the first heat exchange zone 102 and the second heat exchange zone 104 near the gap, and thus improve the overall heat exchange uniformity and heat exchange efficiency of the heat exchange plate.

[0045] In some embodiments, the size of the gap along the first direction x may be further reduced or increased according to the requirements of heat exchange performance, without specific limitation.

[0046] In other embodiments (not shown), the first heat exchange zone is arranged in contact with the second heat exchange zone, and the heat exchange channel of the first heat exchange zone is isolated from the heat exchange channel of the second heat exchange zone.

[0047] This arrangement can reduce the gap between the first heat exchange area and the second heat exchange area, improve the heat exchange performance at the gap, and improve the integration and heat exchange uniformity of the heat exchange plate.

[0048] For example, in one application scenario, a side of the first heat exchange zone close to the second heat exchange zone is arranged in contact with a side of the second heat exchange zone close to the first heat exchange zone; in another application scenario, the first heat exchange zone and the second heat exchange zone are arranged integrally, and the heat exchange channel of the first heat exchange zone is isolated from the heat exchange channel of the second heat exchange zone, for example, an isolation member is arranged between the heat exchange channel of the first heat exchange zone close to the second heat exchange zone and the heat exchange channel of the second heat exchange zone close to the first heat exchange zone; in some embodiments, the isolation member may be integrally formed with the first heat exchange zone and the second heat exchange zone.

[0049] In some embodiments, the first heat exchange area 102 and the second heat exchange area 104 include multiple first diverter islands 111 to form multiple heat exchange channels between two adjacent first diverter islands 111 in the first heat exchange area 102 and between two adjacent first diverter islands 111 in the second heat exchange area 104 .

[0050] By setting the first diverter island 111 to form a plurality of heat exchange channels, the distribution density of the heat exchange channels can be adjusted by setting the number of the first diverter islands 111, thereby improving the convenience of production assembly and structural design; further, the setting of the first diverter island 111 can achieve the diversion of the fluid so that the fluid is more evenly distributed in the first heat exchange zone 102 and / or the second heat exchange zone 104. This setting can make the fluid more evenly distributed in the entire heat exchange area of ​​the heat exchange plate without frequent large-angle turns, thereby reducing the kinetic energy loss of the fluid during the flow process.

[0051] In other embodiments (not shown), multiple first diverter islands may be formed only in the first heat exchange zone to form a heat exchange channel between two adjacent first diverter islands in the first heat exchange zone, or the above-mentioned improvement may be made only in the second heat exchange zone, which will not be repeated here.

[0052] In other embodiments, the heat exchange channel may be formed by other conventional methods, which are not specifically limited.

[0053] In some embodiments, the dimension of the upstream side of the first diverter island 111 along the first direction x is greater than the dimension of the downstream side along the first direction x; wherein the inlet 100 and the turning area 103 are arranged along the second direction y, and the first direction x is perpendicular to the second direction y.

[0054] The size of the upstream side of the first diverter island 111 along the first direction x is larger than the size of the downstream side along the first direction x, which can achieve faster diversion on the upstream side, reduce eddy currents on the downstream side, reduce flow resistance, improve flow uniformity of the fluid, and improve heat exchange uniformity of the heat exchange plate.

[0055] In some embodiments, the first flow dividing island 111 is streamlined in design, which can further reduce the resistance during the flow of the fluid, reduce the kinetic energy loss of the fluid during the flow, and thus reduce the power consumption of the heat exchange plate.

[0056] In some embodiments, the first diverter island 111 is configured in a water drop shape or a fish shape.

[0057] Specifically, the first water drop-shaped or fish-shaped diverter island 111 is streamlined as a whole, with a sharp angle or chamfer on the back side, an acute angle between the extended lines of the two sides of the chamfer, and an arc curve on the front side. Figure 4 As shown in the simulation results, under the same incoming flow velocity, a vortex area 300 will be formed on the back flow side of the first diverter island 111. The teardrop-shaped or fish-shaped first diverter island 111 can effectively reduce the vortex and reduce the flow resistance by 55%.

[0058] The above arrangement can further reduce the flow resistance, reduce the vortex on the backflow side of the first diverter island 111, and thus improve the flow uniformity and distribution uniformity of the fluid, and improve the heat exchange uniformity of the heat exchange plate.

[0059] In some embodiments, a plurality of first flow diverter islands 111 form a fish-school-like array in the first heat exchange region 102 , which can greatly reduce the flow resistance of the collector.

[0060] In some embodiments, a plurality of first flow diversion islands 111 form a fish-school-like array in the second heat exchange region 104, which can greatly reduce the flow resistance of the collector.

[0061] In some embodiments, multiple first flow diversion islands 111 may be evenly distributed in the first heat exchange zone 102 and the second heat exchange zone 104 to further improve the distribution uniformity of the fluid in the first heat exchange zone 102 and the second heat exchange zone 104 .

[0062] In some embodiments, the size of the heat exchange channel can be adjusted by adjusting the shape and size of the first diverter island 111, thereby achieving regulation of the fluid flow rate and the like.

[0063] In other embodiments, the first diverter island may also be in other shapes such as round, diamond, hexagonal, etc., or the first diverter island may also include first sub-diverter islands of various shapes. Based on the different flow rate requirements or heat exchange efficiency requirements for the fluid in different areas of the heat exchange plate, the shape, size, etc. of the first sub-diverter islands in different sub-areas within the first heat exchange zone or the second heat exchange zone may be adjusted in a targeted manner.

[0064] In other embodiments, the first diverter island may be separately provided only in the first heat exchange zone or the second heat exchange zone, wherein the specific implementation manner and working principle of the first diverter island may refer to the above embodiments.

[0065] In some embodiments, the turning zone 103 includes a plurality of second diverter islands 112, and the plurality of second diverter islands 112 are arranged at intervals of the same and different radii around a preset center A; wherein the preset center A is located in the middle of one side where the turning zone 103 is connected to the first heat exchange zone 102 and the second heat exchange zone 104.

[0066] Specifically, the fluid flows through the turning area 103 to achieve turning, and the plurality of second flow diversion islands 112 in the turning area 103 form a plurality of heat exchange channels in the turning area 103; Figure 1 As shown, the first heat exchange zone 102 and the second heat exchange zone 104 are arranged on the same side of the turning zone 103, and the preset point A is located in the middle of the side where the turning zone 103 is connected to the first heat exchange zone 102 and the second heat exchange zone 104; the plurality of second diverter islands 112 rotate around the preset center A and are arranged at intervals, which means that the plurality of second diverter islands 112 are distributed at circumferential intervals around the preset center A with the preset center A as the rotation center.

[0067] The beneficial effect of the above arrangement is that the plurality of second diverter islands 112 form a plurality of heat exchange channels in the turning area 103, which is beneficial to guide and divert the fluid in the turning area 103, facilitates the fluid to be more evenly distributed in the turning area 103, and improves the heat exchange uniformity of the turning area 103; the plurality of second diverter islands 112 are arranged at the same and different radii around the preset center A, which can guide the circumferential turning of the fluid around the preset center A. In an application scenario, such as Figure 1 As shown, the fluid turns 180 degrees to enter the second heat exchange zone 104 (in other embodiments, the turning angle can also be adjusted according to the product usage scenario); the preset center A is located in the middle of the side where the turning zone 103 is connected to the first heat exchange zone 102 and the second heat exchange zone 104. This arrangement can improve the symmetry of the heat exchange plate, reduce the difficulty of production, and facilitate the realization that the size of the first heat exchange zone 102 along the first direction x is equal to the size of the second heat exchange zone 104 along the first direction x, thereby improving the flow uniformity of the fluid in the heat exchange plate.

[0068] In some embodiments, the steering zone 103 does not specifically limit the steering angle of the fluid diversion. In one application scenario, when the steering angle is 180 degrees, it can be easier to achieve the same side setting of the inlet 100 and the outlet 200 while achieving the steering, reduce the gap between the first heat exchange zone 102 and the second heat exchange zone 104, reduce the complexity of design and production, improve the integration of the heat exchange plate, and improve the uniformity of heat exchange.

[0069] In some embodiments, multiple second diverter islands 112 are divided into multiple groups of second diverter islands 112, and multiple second diverter islands 112 in each group of second diverter islands 112 are arranged radially along a preset center A, and the vertical direction is parallel to the body of the heat exchange plate; multiple groups of second diverter islands 112 are arranged at intervals of rotation with the same and different radii around the preset center A, and at least some of the second diverter islands 112 in at least two adjacent groups of second diverter islands 112 are staggered radially along the preset center A. The staggered setting is conducive to disturbing the fluid, reducing the vortex on the back side of the second diverter island 112, further improving the flow uniformity of the fluid, and improving the heat exchange uniformity.

[0070] In some embodiments, the radial dimension of the upstream side of the second diverter island 112 in the preset circle center A is larger than the radial dimension of the downstream side in the preset circle center A, which can reduce the vortex on the downstream side and reduce the flow resistance.

[0071] In some embodiments, the structural size and shape of the second diverter island 112 can refer to the specific implementation of the first diverter island 111. For example, the second diverter island 112 is in a teardrop shape or a fish shape, and is streamlined as a whole. Its back-stream side is sharp or chamfered, and the angle between the extended lines of the two sides of the chamfer is acute. The front-stream side is an arc curve, etc., which will not be repeated here.

[0072] In some embodiments, see Figure 1 , Figure 2 The turning area 103 also includes a third diverter island 113, and the third diverter island 113 and the second diverter island 112 are arranged alternately and spaced around a preset center A according to the same or different radius; at least part of the extended dimension of the third diverter island 113 rotating around the preset center A is greater than the extended dimension of the second diverter island 112 rotating around the preset center A.

[0073] The beneficial effect of the above-mentioned arrangement is that the third diverter island 113 and the second diverter island 112 are arranged alternately and spaced around the preset center A at the same or different radius to form a plurality of heat exchange channels in the turning area 103, which is beneficial to the uniform diversion of the fluid in the turning area 103 and improves the flow uniformity; at least part of the extended dimension of the third diverter island 113 rotating around the preset center A is larger than the extended dimension of the second diverter island 112 rotating around the preset center A, which facilitates the diversion and reduces the flow resistance of the fluid during the turning process.

[0074] In some embodiments, the third diverter island 113 rotates around a preset center A and extends in an arc shape to facilitate fluid diversion in the diversion and diversion area 103 .

[0075] In order to further reduce the eddy current, in some embodiments, the plurality of third diverter islands 113 are divided into a plurality of groups of third diverter islands 113, and the plurality of third diverter islands 113 in each group of third diverter islands 113 are arranged radially along a preset center A, and the radial direction is parallel to the body of the heat exchange plate; the plurality of groups of third diverter islands 113 and the plurality of groups of second diverter islands 112 are arranged alternately and spaced around the preset center A according to the same or different radii, and at least one group of adjacent third diverter islands 113 and one group of second diverter islands 112 are staggered radially along the preset center A, and the staggered arrangement is conducive to disturbing the fluid, reducing the eddy current on the back side of the third diverter island 113 or the second diverter island 112, and improving the uniformity of fluid distribution; further, as Figure 1 , Figure 2 , Figure 5 As shown, the arrangement structure of the plurality of second diverter islands 112 and the plurality of third diverter islands 113 in the turning area 103 facilitates the turning area 103 to form a fish gill-like structure, which facilitates efficient 180-degree turning and diversion of the fluid, and effectively reduces flow resistance.

[0076] In some embodiments, the third diverter island 113 is streamlined, for example, its drainage side is an arc curve, so as to further reduce the flow resistance.

[0077] In some embodiments, Figure 1 As shown, the radial dimension of the third flow-dividing island 113 along the preset circle center A remains unchanged in the fluid flow direction. This arrangement is convenient for reducing production complexity.

[0078] In another embodiment, if Figure 2 As shown, the back side of the third diverter island 113 is a bifurcated structure. This arrangement is conducive to making the structure of the turning area 103 closer to the fish gill-shaped structure, which is convenient for further reducing the flow resistance, reducing the vortex on the back side of the third diverter island 113, and improving the diversion and guidance effects. In other embodiments, the third diverter island can also be other shapes such as round, hexagonal, diamond, etc., which are not specifically limited.

[0079] In some embodiments, in each group of second diverter islands 112, the size of the second diverter islands 112 increases radially along the preset center A; in each group of third diverter islands 113, the size of the third diverter islands 113 increases radially along the preset center A. This arrangement facilitates improving the uniformity of the distribution of the fluid in the turning area 103, facilitates smooth turning of the fluid on the side of the turning area 103 away from the preset point A, and improves the flow uniformity.

[0080] In some embodiments, in the turning area 103, the number of second diverter islands 112 and third diverter islands 113 may be increased radially along the preset center A to improve the uniformity of coverage of the heat exchange channel in the turning area 103 and improve the diversion effect.

[0081] In some embodiments, multiple first diverter islands 111 are arranged in multiple rows spaced apart along the second direction y, and two adjacent rows of first diverter islands 111 are staggered along the first direction x; wherein the first direction x is perpendicular to the second direction y, and the inlet 100 and the turning area 103 are arranged along the second direction y.

[0082] In an application scenario, such as Figure 1 As shown, the plurality of first diverter islands 111 are arranged in a plurality of rows spaced apart from each other along the second direction y.

[0083] Providing multiple rows of first diverter islands 111 is beneficial to improving the diversion effect, making the distribution of the fluid in the first heat exchange area 102 or the second heat exchange area 104 more uniform, thereby improving the heat exchange uniformity; two adjacent rows of first diverter islands 111 are staggered along the first direction x, which can further improve the diversion uniformity, reduce the vortex on the back side of the first diverter island 111, and improve the heat exchange effect of the heat exchange plate.

[0084] In some embodiments, a plurality of fourth flow diversion islands 114 are respectively disposed in the inlet area 101 and the outlet area 105 .

[0085] The inlet area 101 and the outlet area 105 are respectively provided with a plurality of fourth diverter islands 114. Heat exchange channels are formed in the inlet area 101 and the outlet area 105 through the fourth diverter islands 114, respectively, which can improve the diversion effect and coverage range of the fluid in the inlet area 101 and the outlet area 105. The structure is simple and can improve the heat exchange uniformity.

[0086] In some embodiments, the fourth flow dividing island 114 is streamlined, which can reduce flow resistance and fluid flow resistance, thereby helping to reduce power consumption of the heat exchange plate.

[0087] In other embodiments, similar improvements may be made to the heat exchange plate, which will not be described in detail here.

[0088] The present application further proposes a photovoltaic-thermal composite system. The photovoltaic-thermal composite system includes a photovoltaic panel and the above-mentioned heat exchange plate. The structural principle and specific implementation of the heat exchange plate can be referred to the above-mentioned embodiment. No further description will be given here.

[0089] Compared with traditional heat exchange devices such as serpentine coils, the above-mentioned heat exchange plates are used to collect heat from photovoltaic panels in photovoltaic thermal composite systems. The fluid distribution per unit area is more uniform, the coverage area is denser, and the gaps between heat exchange channels are smaller. This can improve the energy utilization rate of the photovoltaic thermal composite system and the temperature uniformity of the photovoltaic panels. The flow resistance is small, which can reduce the power consumption of the heat exchange plates.

[0090] In one application scenario, under the same flow rate, the pressure loss of the heat exchange plate of this embodiment is only less than one twentieth of that of the 7 mm diameter serpentine copper tube, which can greatly reduce the power consumption caused by the pressure resistance of the heat exchange device.

[0091] In some embodiments, at least one side of the heat exchange plate is a flat side, and the photovoltaic panel is disposed in contact with the flat side.

[0092] One side of the heat exchange plate is a flat side, which is convenient for fitting with the photovoltaic panel, can improve the structural stability of the photovoltaic thermal composite system, and can reduce the gap between the photovoltaic panel and the heat exchange plate, improve the uniformity of heat exchange, and then improve the uniformity of temperature distribution of the photovoltaic panel, and reduce the risk of overheating caused by uneven local heat dissipation of the photovoltaic panel.

[0093] Different from the prior art, the inlet and outlet of the heat exchange plate of the present application are arranged on the same side, which is convenient for assembling the inlet and outlet of the heat exchange tube, and is convenient for reducing the size of the heat exchange plate in the direction in which the inlet points to the turning zone; further, since the inlet and outlet are arranged on the same side, it is convenient to increase the size of the first heat exchange zone and the second heat exchange zone in the direction in which the inlet points to the turning zone, thereby facilitating the increase of the heat exchange area of ​​the first heat exchange zone and the second heat exchange zone where the heat exchange channel distribution density is larger, thereby improving the heat exchange efficiency and heat exchange uniformity of the heat exchange plate; further, the distribution density of the heat exchange channel in the inlet zone is smaller than the distribution density of the heat exchange channel in the first heat exchange zone, which can make the fluid enter the first heat exchange zone from the inlet zone. Divided into the heat exchange channel of the first heat exchange zone in an adaptive manner, thereby making the fluid cover the heat exchange channel more evenly. The invention can cover more areas of the first heat exchange zone, reduce the flow resistance during the fluid flow, improve the flow uniformity and distribution uniformity of the fluid, and then improve the heat exchange uniformity of the heat exchange plate; further, the distribution density of the heat exchange channel in the second heat exchange zone is greater than the distribution density of the heat exchange channel in the outflow zone. When the fluid flows from the second heat exchange zone to the outflow zone, the fluid can form a collection effect in an adaptive manner, which is convenient for the fluid to flow out of the heat exchange plate and can reduce the flow resistance during the fluid flow; further, in this embodiment, the fluid flows through the inlet in turn through the inlet zone, the first heat exchange zone, the turning zone, the second heat exchange zone, the outflow zone to the outlet, which can reduce the frequent large-angle turning of the fluid in the heat exchange pipe and produce a large pressure drop, thereby reducing the power consumption of the heat exchange plate. Therefore, this embodiment can improve the heat exchange uniformity and heat exchange efficiency of the heat exchange plate and reduce the power consumption of the heat exchange plate.

[0094] It is worth noting that the drawings in this article are only intended to illustrate the structural relationship and connection relationship of the product of the present application, and do not limit the specific structural dimensions of the product of the present application.

[0095] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A heat exchange plate, characterized in that: The heat exchange plate comprises an inlet, an inflow area connected to the inlet, a first heat exchange area, a turning area, a second heat exchange area, an outflow area, and an outlet connected to the outflow area, and the fluid flows through the inlet in sequence through the inflow area, the first heat exchange area, the turning area, the second heat exchange area, the outflow area to the outlet; The distribution density of the heat exchange channels in the inlet zone is smaller than that in the first heat exchange zone, and the distribution density of the heat exchange channels in the second heat exchange zone is larger than that in the outlet zone; The inlet and the outlet are arranged on the same side of the heat exchange plate.

2. The heat exchange plate according to claim 1, characterized in that: The cross-sectional area of ​​the heat exchange channel of the inlet zone is larger than the cross-sectional area of ​​the heat exchange channel of the first heat exchange zone; The cross-sectional area of ​​the heat exchange channel of the outflow zone is greater than the cross-sectional area of ​​the heat exchange channel of the second heat exchange zone.

3. The heat exchange plate according to claim 1, characterized in that: The first heat exchange area and the second heat exchange area are arranged along a first direction and are disposed in parallel; The inlet and the turning area are arranged along the second direction; The first direction is perpendicular to the second direction, and the fluid flows from the inlet to the turning area along the second direction.

4. The heat exchange plate according to claim 3, characterized in that: The first heat exchange zone is arranged in contact with the second heat exchange zone, and the heat exchange channel of the first heat exchange zone is arranged in isolation from the heat exchange channel of the second heat exchange zone.

5. The heat exchange plate according to claim 3, characterized in that: The first heat exchange zone and the second heat exchange zone are both provided with a first diverter island, and the first heat exchange zone and the second heat exchange zone are spaced apart to form a gap, and the size of the gap along the first direction is smaller than the size of the first diverter island in the first heat exchange zone and the second heat exchange zone along the first direction.

6. The heat exchange plate according to claim 1, characterized in that: The first heat exchange region and / or the second heat exchange region includes a plurality of first flow diverter islands to form a plurality of heat exchange channels between two adjacent first flow diverter islands in the first heat exchange region and / or between two adjacent first flow diverter islands in the second heat exchange region.

7. The heat exchange plate according to claim 6, characterized in that: The dimension of the upstream side of the first diverter island along the first direction is greater than the dimension of the downstream side thereof along the first direction; Wherein, the inlet and the turning area are arranged along a second direction, and the first direction is perpendicular to the second direction.

8. The heat exchange plate according to claim 7, characterized in that: The first diversion island is arranged in a water drop shape or a fish shape.

9. The heat exchange plate according to claim 1, characterized in that: The turning area includes a plurality of second diverter islands, and the plurality of second diverter islands are arranged at intervals of rotation with the same or different radii around a preset center of a circle; Wherein, the preset center of the circle is located in the middle of one side where the turning area is connected with the first heat exchange area and the second heat exchange area.

10. The heat exchange plate according to claim 9, characterized in that: The turning area further includes a third diverter island, which is arranged alternately and spaced apart with the second diverter island in rotation around the preset center of the circle at the same or different radius; An extension dimension of at least a portion of the third diverter islands when rotating around the preset circle center is greater than an extension dimension of the second diverter islands when rotating around the preset circle center.

11. The heat exchange plate according to claim 6, characterized in that: The plurality of first flow diverter islands are arranged in a plurality of rows spaced apart along the second direction, and the first flow diverter islands in two adjacent rows are staggered along the first direction; Wherein, the inlet and the turning area are arranged along a second direction, and the first direction is perpendicular to the second direction.

12. The heat exchange plate according to claim 3, characterized in that: A side of the turning area connected to the first heat exchange area and the second heat exchange area extends along the first direction, and a size of the first heat exchange area along the second direction is equal to a size of the second heat exchange area along the second direction.

13. The heat exchange plate according to claim 1, characterized in that: The inflow area and the outflow area are respectively provided with a plurality of fourth flow diversion islands.

14. A photovoltaic-thermal composite system, characterized in that: include: Photovoltaic panels; The heat exchange plate according to any one of claims 1 to 10.

15. The photovoltaic-thermal composite system according to claim 14, characterized in that: At least one side of the heat exchange plate is a plane side, and the photovoltaic panel is arranged in contact with the plane side.

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