Photovoltaic photo-thermal radiator

Abstract

The utility model discloses a photovoltaic photo-thermal radiator which is convenient to install, ensures stable and reliable operation in use and has high heat exchange efficiency. The heat exchanger comprises two sets of collecting pipes, a plurality of flat grooves are formed in one side, in the length direction, of a pipe body of each collecting pipe at intervals, and at least one water inlet and outlet hole is formed in the upper portion, in the length direction, of each collecting pipe; the micro-channel flat pipes are arranged in a flat mode, and a plurality of micro-channels arranged at intervals are arranged on the micro-channel flat pipes in the width direction in the longitudinal cutting state; the flat grooves correspond to the outer contours of the micro-channel flat pipes in shape in a profiling mode, the two collecting pipes are arranged in parallel in a spaced mode, the flat grooves in the corresponding positions are oppositely arranged in a one-to-one correspondence mode, the corresponding ends of the micro-channel flat pipes are inserted into the flat grooves of the corresponding collecting pipes respectively, and the micro-channel flat pipes are welded and sealed. And the two collecting pipes and the plurality of groups of micro-channel flat pipes are combined to form an integral structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of photovoltaic light heat equipment, specifically is a photovoltaic light heat radiator. BACKGROUND

[0002] Photovoltaic light heat (PVT) radiator refers to the working waste heat generated by the working photovoltaic module being collected and taken away by the liquid working medium flowing in the radiator, so as to reduce the working temperature of the photovoltaic module and improve the power generation efficiency.

[0003] In the prior art, the photovoltaic light heat radiator generally adopts a blown plate radiator or a stainless steel flat plate collector.

[0004] The principle of the blown plate radiator is that the heat is taken away by the high-speed flowing liquid / gas in the radiator, so as to effectively reduce the temperature of the external equipment. The blown plate is composed of two layers of metal materials, the inner layer is a metal with high thermal expansion coefficient, and the outer layer is a metal with low thermal expansion coefficient. The two layers of metal are connected together by brazing or other methods to form an integral structure. When the blown plate is heated, the expansion coefficient of the inner layer metal is greater than that of the outer layer metal, which causes the blown plate to bend outward, the gap between the fins becomes narrower, the path of the air flow becomes longer, and the air speed becomes slower. The main disadvantage is that the flow resistance is very large, and the heat exchange efficiency is poor. Secondly, the pressure bearing capacity is not enough, and the bulging phenomenon often occurs.

[0005] The heat absorber of the stainless steel flat plate collector is made of two pieces of ultra-pure ferrite stainless steel flat plates, which are plasticized into an integral plate flow channel through a 1600T press, a forming die, and then welded by water-invasive pulse welding and resistance welding around, and finally made after double ultra-cleaning and 100% pressure test and leakage test. The main disadvantage is that the heat exchange efficiency of stainless steel is poor, and the weight is heavy and difficult to install.

[0006] Therefore, it is urgent to develop a photovoltaic light heat radiator, which is easy to install and ensures stable and reliable operation, high heat exchange efficiency in use. INVENTION CONTENTS

[0007] In view of the above problems, the utility model provides a photovoltaic light heat radiator, which is easy to install and ensures stable and reliable operation, high heat exchange efficiency in use.

[0008] A photovoltaic light heat radiator, characterized in that it comprises:

[0009] Two groups of collecting pipes, a plurality of flat grooves are arranged on one side of the pipe body of each group of collecting pipes along the length direction, and at least one water inlet and outlet hole is arranged at the upper part of the length direction of each group of collecting pipes;

[0010] And a plurality of groups of micro-channel flat tubes, which are arranged in a flat manner, and a plurality of micro-channels are arranged in the micro-channel flat tubes along the width direction in the longitudinal section.

[0011] The shape of the flat groove corresponds to the outer profile of the micro-channel flat tube, and the two groups of the current collector are arranged in parallel and spaced apart, and the corresponding flat grooves at the corresponding positions are arranged in opposite directions one by one. The corresponding ends of each micro-channel flat tube are respectively inserted into the flat grooves of the corresponding current collector and welded to seal the flat grooves. Two current collectors and several groups of micro-channel flat tubes are combined to form an overall structure.

[0012] The heat exchange surface of the middle region of the micro-channel flat tube is flush with the support installation edge of the two side current collectors, so that when installed, the heat exchange surface of the middle region of the micro-channel flat tube is arranged to fit the surface of the corresponding photovoltaic module.

[0013] It further has the following characteristics:

[0014] The length direction of the micro-channel flat tube is provided with a guide transition area at both ends, and the middle region of the length direction of the micro-channel flat tube is a heat exchange region. The heat exchange surface of the heat exchange region is used to fit the surface of the corresponding photovoltaic module. The guide transition area is used to guide the bending transition of the medium into the backward heat exchange region, so as to ensure the smooth and reliable flow of the medium.

[0015] The micro-channel flat tube is further provided with a raised avoiding area corresponding to the position of the photovoltaic power generation terminal. The raised avoiding area is shaped according to the raised shape of the photovoltaic power generation terminal.

[0016] When arranged, each photovoltaic power generation terminal is arranged in the width region of a single group of micro-channel flat tubes, so that each photovoltaic power generation terminal only needs to adjust the corresponding raised avoiding area of a group of micro-channel flat tubes, so that the radiator is simple to manufacture.

[0017] The raised avoiding area includes an upward slope section, a horizontal section, and a downward slope section. The raised avoiding area ensures the smooth and reliable flow of the medium.

[0018] Adjacent micro-channel flat tubes are spaced apart along the length direction of the current collector.

[0019] A connecting rod is arranged in at least two of the spacing positions between the two groups of current collectors. The two ends of the connecting rod are respectively welded to the current collectors on both sides, which ensures the stability and reliability of the entire structure.

[0020] The micro-channel flat tube is made of aluminum material, which is a thin-walled multi-micro-channel flat tube. The quality of the photovoltaic and photothermal radiator product is light due to the property of aluminum, and the ground / roof load is small during installation.

[0021] Preferably, the current collector is a circular tube, and the length direction of the current collector is provided with an inlet and outlet hole at both ends. An inlet and outlet joint is installed on each inlet and outlet hole.

[0022] The application relates to a method for using a photovoltaic photothermal radiator, characterized in that: the middle region heat exchange surface of a micro-channel flat tube is attached to the surface of a corresponding photovoltaic module through heat-conducting silica gel, then one of the manifold pipes is used as a medium inlet, the other is used as a medium outlet, a water distributor is arranged in the medium inlet manifold pipe, so that the medium entering from the water inlet and outlet hole is evenly distributed and then flows into each group of flat grooves, then flows along each micro-channel of each group of micro-channel flat tubes to the manifold pipe corresponding to the medium outlet, and then flows out from the water inlet and outlet hole of the manifold pipe corresponding to the medium outlet.

[0023] It is further characterized in that:

[0024] In order to ensure that the pressure drop of the medium is within a reasonable range, when the length of the manifold pipe is relatively long, water inlet and outlet holes are arranged at both ends of the length direction of the manifold pipe, each group of water inlet and outlet holes is connected with a group of water distributors, and each group of water inlets covers a corresponding number of flat grooves in a half length region of the manifold pipe, so that the medium uniformly flows into the flat grooves, thereby ensuring that the flow rate of the medium of all the micro-channel flat tubes is uniform and reliable.

[0025] After the middle region heat exchange surface of the micro-channel flat tube is attached to the surface of a corresponding photovoltaic module through heat-conducting silica gel, then one of the manifold pipes is used as a medium inlet, the other is used as a medium outlet, a water distributor is arranged in the medium inlet manifold pipe, so that the medium entering from the water inlet and outlet hole is evenly distributed and then flows into each group of flat grooves, then flows along each micro-channel of each group of micro-channel flat tubes to the manifold pipe corresponding to the medium outlet, and then flows out from the water inlet and outlet hole of the manifold pipe corresponding to the medium outlet, the middle region heat exchange surface of the micro-channel flat tube is fully reliable and exchanges heat with the photovoltaic module, the micro-channel flat tube has a small self weight, is convenient to install, and ensures stable and reliable operation and high heat exchange efficiency in use. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0027] Figure 2 It is a front view of the utility model;

[0028] Figure 3 It is a top view of the utility model;

[0029] Figure 4 It is a longitudinal section schematic view of the micro-channel flat tube of the utility model;

[0030] Figure 5 It is a side view of the manifold pipe of the utility model;

[0031] The names corresponding to the serial numbers in the drawing are as follows:

[0032] Rising slope section 1, horizontal section 2, descending slope section 3;

[0033] The manifold 10, the support mounting edge 101, the flat groove 11, the water inlet / outlet hole 12, the micro-channel flat tube 20, the micro-channel 21, the middle region heat exchange surface 201, the guide transition area 202, the heat exchange region 203, the convex avoiding area 204, the interval 30, the water inlet / outlet joint 40. DETAILED DESCRIPTION

[0034] A photovoltaic light heat radiator, see Figures 1-5 , comprising two groups of manifolds 10 and several groups of micro-channel flat tubes 20;

[0035] The pipe body of each group of manifolds 10 is arranged with several flat grooves 11 at one side along the length direction, and the upper part of the length direction of each group of manifolds 10 is provided with at least one water inlet / outlet hole 12;

[0036] Each group of micro-channel flat tubes 20 is arranged in a flat manner, and in the longitudinal section state, the micro-channel flat tube 20 is arranged with several micro-channels 21 arranged at intervals along the width direction;

[0037] The shape of the flat groove 11 is correspondingly shaped to the outer contour of the micro-channel flat tube 20, the two groups of manifolds 10 are arranged in parallel and at intervals, and the corresponding flat grooves 11 at the corresponding positions are arranged in pairs, respectively, one by one, the corresponding ends of each micro-channel flat tube 20 are respectively inserted into the flat grooves 11 of the corresponding manifolds 10 and welded to seal, and the two manifolds 10 and the several groups of micro-channel flat tubes 20 are combined to form an overall structure;

[0038] The middle region heat exchange surface 201 of the micro-channel flat tube 20 is flush with the support mounting edge 101 of the two side manifolds 10, so that when mounted, the middle region heat exchange surface 201 of the micro-channel flat tube 20 is arranged to fit the surface of the corresponding photovoltaic module.

[0039] In specific embodiments, the length direction both ends of the micro-channel flat tube 20 are provided with a guide transition area 202, the middle region of the length direction of the micro-channel flat tube 20 is a heat exchange region 203, and the middle region heat exchange surface 201 of the heat exchange region 203 is used to fit the surface of the corresponding photovoltaic module, and the guide transition area 202 is used to guide the bending transition of the medium entering the heat exchange region 203 from the flat groove 11, to ensure the smooth and reliable flow of the medium;

[0040] The micro-channel flat tube 20 is also provided with a convex avoiding area 204 corresponding to the position of the photovoltaic power generation terminal, and the convex avoiding area 204 is shaped to the convex shape of the photovoltaic power generation terminal;

[0041] When arranged, each photovoltaic power generation terminal is arranged in the width region of a single group of micro-channel flat tubes 20, so that each photovoltaic power generation terminal only needs to adjust the corresponding convex avoiding area 204 of a group of micro-channel flat tubes 20, so that the radiator is simple to manufacture;

[0042] The raised avoidance area 204 includes an ascending slope section 1, a horizontal section 2, and a descending slope section 3. The raised avoidance area 204 ensures smooth and reliable flow of the medium.

[0043] A gap 30 is left between adjacent microchannel flat tubes 20 along the length direction of the header 10 .

[0044] In specific implementation, a connecting rod (not shown in the figure, it can be arranged reasonably according to needs) is set in the interval 30 between the two groups of collecting pipes as needed. The two ends of the connecting rod are welded to the collecting pipes 10 on both sides, which ensures that the entire structure is stable and reliable.

[0045] In specific implementation, the microchannel flat tube 20 is made of aluminum material, which is a thin-walled multi-microchannel flat tube. This property of aluminum is used to make the photovoltaic thermal radiator product lighter in weight and the ground / roof load during installation is smaller; at the same time, the collecting pipe 10 and the corresponding connecting rod are also made of aluminum material to ensure the lightweight of the entire radiator.

[0046] In a specific embodiment, the microchannel flat tube 20 has a specification of 80*3*25mm and an inner cavity with 25 microchannels 21 of 2.88*3mm. Under certain heat exchange conditions, the refrigerant of the microchannel flat tube 20 with the technical parameters flows in through the manifold 10 of the inlet pipeline and flows out of the manifold 10 of the outlet pipeline, ensuring that the refrigerant entering each microchannel flat tube process is liquid-phase, thereby improving the uniformity of the refrigerant flow entering the microchannel flat tube process.

[0047] The manifold 10 used has a specification of 2-φ20*1.5mm. The manifold 10 is a round tube. Under the same cross-sectional area, the flow rate of a round tube is faster than that of a square tube because the inner surface area of ​​the round tube is smaller, the water flow resistance is smaller, and the flow rate is faster. Two water inlet and outlet holes 12 are respectively provided at both ends of the manifold in the longitudinal direction. Each water inlet and outlet hole 12 is installed with an inlet and outlet water connector 40. Specifically, the inlet and outlet water connector 40 is a convex cylindrical G3 / 8 pipe thread structure.

[0048] After the radiator is welded, it must pass the sealing pressure test: nitrogen pressure 14MPa, helium 0.8MPa without leakage;

[0049] Four raised avoidance areas 204 (26*15mm) are set on the upper, middle and lower parts of the radiator for connecting photovoltaic power generation terminals, ensuring the connection of the inverter equipment.

[0050] A method for using a photovoltaic photothermal radiator: the middle region heat exchange surface of the micro-channel flat tube 20 is attached to the surface of the corresponding photovoltaic module through the heat-conducting silica gel, then one of the manifold pipes 10 is used as the medium inlet, the other is used as the medium outlet, a water distributor is arranged in the medium inlet manifold pipe 10, so that the medium entering from the water inlet and outlet hole 12 is evenly distributed and then flows into each group of flat grooves 11, then flows along each micro-channel 21 of each group of micro-channel flat tubes 20 to the manifold pipe 10 corresponding to the medium outlet, and then flows out from the water inlet and outlet hole 12 of the manifold pipe 10 corresponding to the medium outlet.

[0051] In specific implementation, in order to ensure that the pressure drop of the medium is within a reasonable range, when the length of the manifold pipe 10 is relatively long, the water inlet and outlet holes 12 are arranged at both ends of the length direction of the manifold pipe 10, each group of water inlet and outlet holes 12 is connected with a group of water distributors, and each group of water distributors covers the medium of the corresponding number of flat grooves 11 in the half length region of the manifold pipe, so that the medium flows uniformly and reliably.

[0052] The working principle is as follows: the middle region heat exchange surface of the micro-channel flat tube is attached to the surface of the corresponding photovoltaic module through the heat-conducting silica gel, then one of the manifold pipes is used as the medium inlet, the other is used as the medium outlet, a water distributor is arranged in the medium inlet manifold pipe, so that the medium entering from the water inlet and outlet hole is evenly distributed and then flows into each group of flat grooves, then flows along each micro-channel of each group of micro-channel flat tubes to the manifold pipe corresponding to the medium outlet, and then flows out from the water inlet and outlet hole of the manifold pipe corresponding to the medium outlet, the middle region heat exchange surface of the micro-channel flat tube fully and reliably exchanges heat with the photovoltaic module, the micro-channel flat tube has small self weight, is convenient to install, and ensures stable and reliable operation, high heat exchange efficiency in use.

[0053] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0054] In addition, it should be understood that, although the present application is described in the form of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A photovoltaic photothermal heat spreader, characterized in that, It comprises: Two groups of collecting pipes, the pipe body of each group of collecting pipes is arranged with a plurality of flat grooves on one side along the length direction, and the upper part of the length direction of each group of collecting pipes is provided with at least one water inlet and outlet hole; And a plurality of groups of micro-channel flat tubes, which are arranged flat, and in the longitudinal section state, the micro-channel flat tubes are arranged with a plurality of micro-channels arranged at intervals along the width direction; The shape of the flat groove is correspondingly shaped to the outer contour of the micro-channel flat tube, the two groups of collecting pipes are arranged in parallel and at intervals, and the flat grooves at the corresponding positions are arranged in pairs respectively, the corresponding ends of each micro-channel flat tube are respectively inserted into the flat grooves of the corresponding collecting pipes and welded to seal, and the two collecting pipes and a plurality of groups of micro-channel flat tubes are combined to form an overall structure; The heat exchange surface of the middle region of the micro-channel flat tube is flush with the supporting and mounting edge of the two collecting pipes, so that when mounted, the heat exchange surface of the middle region of the micro-channel flat tube is arranged to fit the surface of the corresponding photovoltaic module.

2. A photovoltaic photothermal heat spreader according to claim 1, wherein: The length direction of the micro-channel flat tube is provided with a guide transition area at both ends, the middle region of the length direction of the micro-channel flat tube is a heat exchange region, the heat exchange surface of the heat exchange region is used to fit the surface of the corresponding photovoltaic module, and the guide transition area is used to guide the bending transition of the medium entering the back heat exchange region along the flat groove.

3. A photovoltaic photothermal heat spreader according to claim 1, wherein: The micro-channel flat tube is also provided with a raised avoidance area corresponding to the position of the photovoltaic power generation terminal, and the raised avoidance area is shaped according to the raised shape of the photovoltaic power generation terminal.

4. A photovoltaic photothermal heat spreader according to claim 3, wherein: Each photovoltaic power generation terminal is arranged in the width region of a group of micro-channel flat tubes, so that each photovoltaic power generation terminal only needs to adjust the corresponding raised avoidance area of a group of micro-channel flat tubes.

5. A photovoltaic photothermal heat spreader according to claim 3, wherein: The raised avoidance area comprises a rising slope section, a horizontal section and a descending slope section.

6. A photovoltaic photothermal heat spreader according to claim 1, wherein: There is a gap between adjacent micro-channel flat tubes along the length direction of the collecting pipe.

7. A photovoltaic photothermal heat spreader according to claim 6, wherein: A connecting rod is arranged in at least two of the gap positions between the two groups of collecting pipes, and the two ends of the connecting rod are respectively welded to connect the collecting pipes on both sides.

8. A photovoltaic photothermal heat spreader according to claim 1, wherein: The micro-channel flat tube is made of aluminum material, which is a thin-walled multi-micro-channel flat tube.

9. A photovoltaic photothermal heat spreader according to claim 1, wherein: The collecting pipe is a circular pipe, and the length direction of the collecting pipe is provided with a water inlet and outlet hole at both ends, and a water inlet and outlet joint is mounted on each water inlet and outlet hole.

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