A multi-source channel solar heat collection field working medium converging distribution device

Abstract

This invention belongs to the field of solar heating technology and discloses a working fluid distribution device for a multi-source channel solar collector field. By setting up a single-channel independent adjustment module for each solar collector field, combined with regulating valves and flow sensors on the supply water branch and temperature and concentration sensors on the return water branch, and combined with multi-parameter priority control of the controller, independent adjustment and dynamic flow distribution at the channel level of each collector field are achieved, effectively solving the pain points of hydraulic imbalance and low heat utilization efficiency that are prone to occur in decentralized solar collector fields. The internal structure of the manifold is divided into a primary zone, a transition zone, and a mixing zone. The flow guiding structure in the primary zone guides the stratified flow of the working fluid, the perforated guide plate in the transition zone achieves initial mixing of the working fluid, and the static mixer in the mixing zone promotes full integration of the working fluid and improves the uniformity of working fluids of different grades. The overall structure can comprehensively coordinate the differences in parameters and operating conditions of each collector field, thereby improving the overall operating efficiency and stability of the decentralized solar heating system.

Description

Technical Field

[0001] This invention belongs to the field of solar heating technology, specifically a multi-source channel solar thermal field working fluid collection and distribution device. Background Technology

[0002] With the diversification of building forms, the decentralization of energy use scenarios, and the limitations of roof and site conditions, the traditional centralized solar heating mode is not adaptable enough. The application demand and research attention of decentralized solar heat source collection systems with decentralized collection and centralized distribution continue to increase.

[0003] The dispersed solar collectors differ in parameters such as scale, distance, elevation difference, operating conditions, and working fluid heat quality, which can easily lead to problems such as uneven flow distribution, large differences in outlet temperature and working fluid concentration.

[0004] Currently, the industry mainly addresses the problems existing in distributed solar thermal source collection systems by using traditional pipe diameter design or single-parameter adjustment methods. Pipe diameter design primarily involves pre-setting pipe diameter specifications based on the fundamental parameters of each collector field during the initial system construction phase, attempting to balance the resistance and flow rate of each branch by fixing the pipe diameter. Single-parameter adjustment methods, on the other hand, adjust a single indicator (such as flow rate or temperature) to alleviate some operational anomalies and ensure basic system operation.

[0005] The traditional pipe diameter design or single-parameter adjustment methods currently used have obvious limitations and cannot meet the operational requirements of decentralized solar thermal source collection systems. The core problem is that it is difficult to comprehensively reflect the actual operating status of each collector field and cannot achieve multi-factor coordinated adjustment. This leads to hydraulic imbalance or low heat utilization efficiency in some collector field branches, ultimately affecting the overall operating efficiency and stability of the decentralized solar heating system and failing to solve the comprehensive operational risks caused by the differences in multiple parameters among the collector fields. Summary of the Invention

[0006] This invention provides a multi-source channel solar thermal collector working fluid confluence and distribution device, which solves the problems of uneven flow distribution, hydraulic imbalance and low heat transfer efficiency caused by differences in the scale of each collector field, the length of the pipeline, the elevation and the resistance characteristics of each collector field in the existing decentralized solar thermal collector system.

[0007] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a multi-source channel solar thermal collector working fluid distribution device, comprising: a distribution manifold, a junction manifold, multiple single-channel independent regulating modules, and a controller; the outlet end of the distribution manifold is connected to the inlet end of multiple solar thermal collectors via multiple water supply branches; the inlet end of the junction manifold is connected to the outlet end of multiple solar thermal collectors via multiple return water branches; each solar thermal collector is provided with a corresponding single-channel independent regulating module; the single-channel independent regulating module includes a regulating valve and a flow sensor installed on the corresponding water supply branch, and a regulating valve and a flow sensor installed on the corresponding return water branch. Temperature and concentration sensors are provided on the branch lines; the controller is electrically connected to the regulating valve, flow sensor, temperature sensor, and concentration sensor in each single-channel independent regulating module, and performs priority control and allocation of the flow of each branch line based on multiple parameters; the inside of the manifold is divided into a primary zone, a transition zone, and a mixing zone along the flow direction of the working fluid; the primary zone is provided with a flow guide structure to guide the working fluid to form a stratified flow, the transition zone is provided with an open flow guide plate to allow the working fluid to be initially mixed after stratification, and the mixing zone is provided with a static mixer to allow the working fluid to be fully mixed.

[0008] According to one embodiment of the present invention, the regulating valve is an electric proportional regulating valve, and the controller is electrically connected to the electric proportional regulating valve.

[0009] According to one embodiment of the present invention, the flow guiding structure in the primary region includes a lower arc-shaped flow guide plate and an upper arc-shaped flow guide plate, which guides working fluids with different properties to different flow layers to form density stratification.

[0010] According to one embodiment of the present invention, the perforated guide plate is a vertically arranged perforated plate with a plurality of through holes uniformly formed on the plate.

[0011] According to one embodiment of the present invention, the static mixer is an X-type cross-blade static mixer, which is composed of multiple X-type mixing units connected in series. Each mixing unit is provided with cross blades that are at a certain angle to the flow direction, and the cross blades of adjacent mixing units are staggered.

[0012] According to one embodiment of the present invention, the controller is based on multiple parameters including the return water temperature, flow rate and working fluid concentration of each branch. The controller constructs a priority evaluation function based on the multiple parameters and determines the priority of each branch according to the calculation results, so as to adjust the opening degree of the corresponding regulating valve.

[0013] According to one embodiment of the present invention, the system further includes a circulating pump and a frequency converter connected to the drive end of the circulating pump. The frequency converter is electrically connected to the controller, and the controller sends a control signal to the frequency converter according to the total flow of each branch and the system operating status to adjust the speed of the circulating pump.

[0014] According to one embodiment of the present invention, the distribution manifold and the junction manifold are respectively used to connect with the heat collection side of the plate heat exchanger to form a heat collection side circulation loop.

[0015] According to one embodiment of the present invention, the heat collection side of the plate heat exchanger is connected to the heat storage body via a circulating pump to realize heat exchange between the heat collection side and the heat storage side.

[0016] According to one embodiment of the present invention, the single-channel independent adjustment module adopts a standardized module structure and can be configured to be increased or decreased according to the number of solar collector fields.

[0017] Compared with existing technologies, this invention has the following advantages: This invention provides a multi-source channel solar collector working fluid distribution device. By setting up a single-channel independent adjustment module for each solar collector, coupled with regulating valves and flow sensors on the supply branch and temperature and concentration sensors on the return branch, and combined with multi-parameter priority control of the controller, independent adjustment and dynamic flow distribution at the channel level for each collector are achieved. This effectively solves the problems of hydraulic imbalance and low heat utilization efficiency that easily occur in decentralized solar collectors. The internal structure of the manifold is divided into a primary zone, a transition zone, and a mixing zone. The flow guiding structure in the primary zone guides the stratified flow of the working fluid, the perforated guide plate in the transition zone achieves initial mixing of the working fluid, and the static mixer in the mixing zone promotes full fusion of the working fluid, improving the uniformity of working fluids of different grades. The overall structure can comprehensively coordinate the differences in parameters and operating conditions of each collector, thereby improving the overall operating efficiency and stability of the decentralized solar heating system and meeting practical application requirements. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of a multi-source channel solar thermal field working fluid confluence and distribution device according to an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of the multi-source channel working fluid combiner and distribution device according to an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of the manifold in an embodiment of the present invention.

[0022] Figure 4 This is a logic diagram for dynamic adjustment control of multiple parameters priority according to an embodiment of the present invention.

[0023] In the diagram: 1. Heat collector field; 2. Single-channel independent adjustment module; 21. Electric proportional control valve; 22. Flow sensor; 23. Temperature sensor; 3. Distribution manifold; 4. Merging manifold; 41. Housing shell; 42. Lower arc-shaped guide plate; 43. Upper arc-shaped guide plate; 44. Perforated guide plate; 45. X-type cross-blade static mixer; 5. Controller; 6. Circulating pump; 7. Frequency converter; 8. Plate heat exchanger collector side; 9. Hot water storage body; 10. Plate heat exchanger load side; 11. Air source heat pump; 12. Water distributor; 13. Water collector. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components.

[0028] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] like Figure 1 and Figure 2 As shown, this embodiment provides a multi-source channel solar thermal collector working fluid distribution device, including a distribution manifold 3, a junction manifold 4, multiple single-channel independent adjustment modules 2, and a controller 5. Multiple solar thermal collectors 1 are connected in parallel between the distribution manifold 3 and the junction manifold 4 through water supply branches and return branches.

[0030] In one application, the distribution manifold 3 and the junction manifold 4 can be connected to the collector side 8 of the plate heat exchanger, forming a collector-side circulation loop. The collector side 8 of the plate heat exchanger is connected to the storage water body 9 via the circulation pump 6, forming an indirect heat exchange loop between the collector side and the storage side, realizing heat transfer from the collector side to the storage side. This connection method can effectively avoid direct mixing of the working medium in the collector field and the storage medium, improving the safety of system operation and the convenience of water quality management. The drive end of the circulation pump 6 is connected to a frequency converter 7, which is electrically connected to the controller 5. The controller 5 sends a control signal to the frequency converter 7 according to the total flow of each branch and the system operating status to adjust the speed of the circulation pump 6. By coordinating the distribution of the total circulation flow and the branch flow, the system pressure fluctuations caused by independent adjustment of branch valves are effectively avoided, achieving a stable transition of the system's hydraulic state.

[0031] Each solar collector field 1 corresponds to a single-channel independent regulation module 2, and these modules are arranged in parallel to form a multi-channel parallel regulation structure. The single-channel independent regulation module 2 adopts a standardized modular structure, which can be increased or decreased according to the number of solar collector fields 1. This modular design allows the device to flexibly adapt to solar thermal systems of different sizes. When expanding, reducing, or repairing parts of the system, the overall piping structure does not need to be modified, significantly improving the system's scalability and maintenance convenience.

[0032] like Figure 2 As shown, each branch water supply line is equipped with an electric proportional regulating valve 21 and a flow sensor 22, while the return water line is equipped with a temperature sensor 23 and a concentration sensor 24. The temperature sensor 23 is located between the collector outlet and the concentration sensor 24, and the concentration sensor 24 is located between the temperature sensor 23 and the manifold 4. Using the electric proportional regulating valve 21 for flow regulation, compared to on / off valves, enables stepless continuous flow regulation with high accuracy and fast response, providing a reliable hardware foundation for the execution of multi-parameter priority dynamic regulation strategies. Each sensor and the electric proportional regulating valve 21 is electrically connected to the controller 5.

[0033] like Figure 3As shown, the manifold 4 has a graded flow guiding and mixing structure inside. The manifold 4 includes a housing 41, a lower arc-shaped guide plate 42, an upper arc-shaped guide plate 43, an open guide plate 44, and an X-shaped cross-blade static mixer 45. The housing 41 is a horizontally arranged cylindrical or rectangular cavity, with multiple branch water inlets on its left end face and a main water outlet on its right end face. The interior of the manifold 4 is divided into a primary zone, a transition zone, and a mixing zone along the flow direction of the working fluid. By decomposing the mixing process into three ordered stages—flow guiding stratification, shear mixing, and enhanced mixing—the flow control objectives of each stage are clear, effectively avoiding the severe turbulence and local short-circuit flow phenomena caused by single mixing in traditional manifold structures, and significantly improving the overall mixing efficiency.

[0034] The lower arc-shaped guide vane 42 and the upper arc-shaped guide vane 43 are disposed in the primary zone, extending from the inner wall of the left end face to the right in a gradually expanding arc shape. The lower arc-shaped guide vane 42 and the upper arc-shaped guide vane 43 work together to guide the incoming working fluids with different densities and momentum due to temperature and velocity differences to different flow layers in the tank. This allows the fluids in each branch to form a relatively orderly stratified flow before entering the mixing stage, thereby effectively reducing the direct impact and turbulence intensity at the inlet, reducing the local resistance loss caused by violent collisions, and laying the foundation for subsequent uniform mixing.

[0035] The perforated guide plate 44 is located at the boundary between the transition zone and the primary zone. It is a vertically arranged perforated plate with multiple uniformly distributed through holes, and the opening ratio is 20% to 40%. When the stratified working fluid flows through the perforated guide plate 44, the upper and lower fluids experience local contraction and diffusion flow through the orifices, forming a shear layer around the orifices. Initial mixing begins through pressure equalization. The uniformly distributed porous structure ensures that the incoming flow experiences relatively uniform shearing across the entire cross-section, avoiding secondary inhomogeneities caused by localized concentrated mixing.

[0036] The X-shaped cross-blade static mixer 45 is located within the mixing zone and consists of multiple X-shaped mixing units connected in series. Each mixing unit has cross-blades at a 45° angle to the flow direction, and the cross-blades of adjacent mixing units are staggered by 90°. The mixer is fixed to the inner wall of the housing 41 by a support. This structure causes the fluid to undergo a splitting, rotation, and recombination process as it flows through each mixing unit. The 90° stagger of the blades in adjacent units ensures that the fluid is alternately subjected to shearing and overturning in different spatial directions, thereby forming a continuous three-dimensional turbulent flow, achieving thorough and uniform mixing of the working fluid within a relatively short mixing length.

[0037] like Figure 4As shown, this invention employs a multi-parameter priority dynamic adjustment control method. The multi-parameters upon which the controller 5 is based include the return water temperature, branch flow rate, and working fluid concentration of each branch. The controller 5 constructs a priority evaluation function based on these parameters and determines the priority of each branch according to the calculation results to adjust the opening degree of the corresponding regulating valve. The priority evaluation function is as follows: The system calculates priorities and adjusts the opening of the electric proportional control valve 21 accordingly to achieve adaptive flow distribution. Branches with higher priorities are assigned larger valve openings, thus receiving priority in system flow allocation. Priorities are dynamically updated based on operating parameters, enabling adaptive flow distribution. By comprehensively considering operating parameters of concentration, temperature, and flow rate, the flow distribution decision can more comprehensively reflect the real-time heat production capacity and working fluid quality of each collector branch. This overcomes the shortcomings of traditional single-parameter control, which cannot simultaneously consider working fluid quality and hydraulic characteristics, and improves the system's adaptability to changing operating conditions.

[0038] Example 1 In a decentralized solar heating system, three solar collector fields 1A, 1B, and 1C are set up, each corresponding to one of three parallel branches. Each branch is equipped with a single-channel independent regulating module 2, which is connected to a controller 5. The pipe diameter, flow rate, concentration, and initial temperature parameters of each branch are shown in Table 1.

[0039] Table 1 Initial operating parameters for each branch

[0040] Controller 5 first calculates the flow velocity based on the pipe diameter and flow rate of each branch. ,in The unit is m³ / s. The unit is meters (m). The calculation result is: Branch Road 1A: ; Branch Road 1B: ; Branch 1C: ; Controller 5 calculates the system average value: average concentration ; Average temperature ; Average flow velocity ; Calculate the deviation of each branch:

[0041] Branch 1A: 6.67, Branch 1B: -13.33, Branch 1C: 6.67; Branch 1A: 7, Branch 1B: -7, Branch 1C: 0; Branch 1A: -0.06, Branch 1B: -0.067, Branch 1C: 0.128; Set the coefficients of the comprehensive evaluation function , , ,satisfy Calculate the comprehensive evaluation value for each branch road:

[0042] Branch Road 1A: ; Branch Road 1B: ; Branch Road 1C .

[0043] Because negative evaluation values ​​appeared, to facilitate normalization, controller 5 shifted all evaluation values ​​to the non-negative interval: Let ,in .get:

[0044]

[0045]

[0046] Summation Normalized weights :

[0047]

[0048]

[0049] Let the total target flow of the system be... The target flow allocation for each branch is as follows:

[0050]

[0051]

[0052] Considering the stability and security of system operation, when the target flow of a certain branch is lower than the set minimum maintenance flow... In this case, the system's flow is limited to a minimum sustaining flow, rather than being completely shut down. Preferably, the minimum sustaining flow can be 5% to 10% of the total system flow.

[0053] Controller 5 calculates the deviation between the current actual flow rate and the target flow rate. Generate valve opening control signal: Branch 1A: Current flow rate is 3.0 m³ / h, target flow rate is 5.41 m³ / h, deviation is +2.41 m³ / h, the opening of electric proportional control valve 21 needs to be increased.

[0054] Branch 1B: Current flow rate is 4.5 m³ / h, target flow rate is 0 m³ / h, deviation is -4.5 m³ / h, the electric proportional control valve 21 needs to be reduced to the minimum maintaining flow rate.

[0055] Branch 1C: Current flow rate is 2.5 m³ / h, target flow rate is 4.59 m³ / h, deviation is +2.09 m³ / h, the opening of electric proportional control valve 21 needs to be increased.

[0056] During the adjustment process, flow sensor 22 monitors the flow rate of each branch in real time, while temperature sensor 23 and concentration sensor 24 continuously collect return water parameters and feed them back to controller 5. Controller 5 dynamically corrects the comprehensive evaluation value of each branch based on the updated operating parameters. And iteratively optimize traffic allocation.

[0057] After several dynamic adjustments, the system tends to operate in a stable state. The flow of each branch gradually approaches the target allocation value, the flow of inefficient branches is effectively suppressed, and high-potential branches receive more flow, thereby improving the overall operational balance of the system.

[0058] In this embodiment, the flow rate of branch 1B is suppressed, while branches 1A and 1C receive more flow rate, thereby achieving dynamic and balanced distribution of flow rate among multiple branches and improving the overall heat utilization efficiency of the system.

[0059] Example 2: In this example, the following is used: Figure 3 The manifold 4 shown is used to collect and mix the return water from multiple branches. It has three return water branches with inlet flow rates of 3.0 m³ / h, 4.5 m³ / h, and 2.5 m³ / h, corresponding to return water temperatures of 38℃, 52℃, and 45℃, respectively.

[0060] The return water from multiple branches first enters the primary zone of the confluence collector 4 (0.5–1.0 m in length, accounting for 20%–30% of the total length). Under the action of the lower arc-shaped guide plate 42 and the upper arc-shaped guide plate 43, the fluid in each branch is deflected along different paths, forming an orderly flow distribution and reducing the direct impact and turbulence at the inlet.

[0061] The fluid enters the transition zone (0.5–1.2 m in length, accounting for 25%–35% of the total length) and passes through the perforated guide plate 44. The perforation diameter of the perforated guide plate 44 is 10–30 mm, and the perforation rate is 20%–40%. When the fluid passes through the orifice, it undergoes local contraction and diffusion flow, forming a shearing effect, which causes the fluids in different branches to be initially mixed.

[0062] The fluid further enters the mixing zone (0.8–1.5 m in length, accounting for 30%–40% of the total length) and passes through an X-shaped cross-blade static mixer 45. The static mixer has 2–5 stages, with each stage's blades forming a 45° angle with the main flow direction, and adjacent stages are arranged crosswise. Under the action of the mixer, the fluid undergoes multiple splitting and recombination processes, forming a three-dimensional turbulent flow, achieving thorough mixing.

[0063] After the above-mentioned graded diversion and mixing process, the fluid temperature at the outlet of the manifold stabilizes in the range of 44℃ to 46℃, which is significantly lower than the initial temperature difference of each branch (maximum temperature difference of 14℃).

[0064] This embodiment demonstrates that a hierarchical structural design, consisting of a primary zone for guiding flow, a transition zone for shear mixing, and a mixing zone for enhanced mixing, can effectively improve the uneven flow and insufficient mixing during the confluence of multiple branches, thereby enhancing the uniformity of the outlet fluid parameters. The clear division of functions and progressive arrangement of each zone enable the manifold 4 to perform uniform mixing of large temperature differences and multiple flow rates within a compact space.

[0065] In summary, the multi-channel solar collector working fluid distribution device of the present invention, by constructing a multi-channel parallel independent adjustment structure and combining it with a dynamic adjustment method based on multi-parameter priority evaluation, achieves refined flow distribution and optimized heat transfer of the decentralized solar collector 1, effectively solving the problems of hydraulic imbalance and uneven heat distribution during the parallel operation of multiple collectors. Simultaneously, the staged flow guiding and mixing structure design of the manifold 4 significantly improves the mixing uniformity of the return water from multiple branches, ensuring the consistency of working fluid parameters entering subsequent heat exchange stages. This device has a clear structure, strong scalability, and is suitable for solar heating systems with multiple collectors distributed in a decentralized manner.

[0066] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or basic characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects.

[0067] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A working fluid collection and distribution device for a multi-source channel solar thermal collector field, characterized in that, include: Distribution header (3), junction header (4), multiple single-channel independent adjustment modules (2) and controller (5); The outlet of the distribution box (3) is connected to the inlet of multiple solar thermal collectors (1) through multiple water supply branches; The inlet end of the manifold (4) is connected to the outlet end of multiple solar thermal collectors (1) through multiple return water branches; Each solar collector field (1) is equipped with a single-channel independent adjustment module (2); The single-channel independent adjustment module (2) includes an adjustment valve and a flow sensor installed on the corresponding water supply branch, and a temperature sensor and a concentration sensor installed on the corresponding return water branch. The controller (5) is electrically connected to the regulating valve, flow sensor, temperature sensor and concentration sensor in each single-channel independent regulating module (2) respectively, and performs priority control and allocation of the flow of each branch based on multiple parameters; The inside of the manifold (4) is divided into a primary zone, a transition zone and a mixing zone along the direction of the working fluid flow; The primary zone is provided with a flow guide structure for guiding the working fluid to form a stratified flow, the transition zone is provided with an open flow guide plate (44) for initially mixing the working fluid after stratification, and the mixing zone is provided with a static mixer for fully mixing the working fluid.

2. The multi-source channel solar thermal field working fluid collection and distribution device according to claim 1, characterized in that, The regulating valve is an electric proportional regulating valve (21), and the controller (5) is electrically connected to the electric proportional regulating valve (21).

3. The multi-source channel solar thermal field working fluid collection and distribution device according to claim 1, characterized in that, The flow guiding structure in the primary region includes a lower arc-shaped flow guide plate (42) and an upper arc-shaped flow guide plate (43), which guide working fluids with different properties to different flow layers to form density stratification.

4. The working fluid collection and distribution device for a multi-source channel solar thermal collector field according to claim 1, characterized in that, The perforated guide plate (44) is a vertically arranged perforated plate with multiple through holes evenly opened on the plate.

5. The working fluid collection and distribution device for a multi-source channel solar thermal collector field according to claim 1, characterized in that, The static mixer is an X-type cross-blade static mixer (45), which is composed of multiple X-type mixing units connected in series. Each mixing unit is provided with cross blades that are at a certain angle to the flow direction, and the cross blades of adjacent mixing units are staggered.

6. The working fluid collection and distribution device for a multi-source channel solar thermal collector field according to claim 1, characterized in that, The controller (5) is based on multiple parameters including the return water temperature, flow rate and working fluid concentration of each branch. The controller (5) constructs a priority evaluation function based on the multiple parameters and determines the priority of each branch based on the calculation results in order to adjust the opening of the corresponding regulating valve.

7. The multi-source channel solar thermal field working fluid collection and distribution device according to claim 1, characterized in that, It also includes a circulating pump (6) and a frequency converter (7) connected to the drive end of the circulating pump (6). The frequency converter (7) is electrically connected to the controller (5). The controller (5) sends a control signal to the frequency converter (7) according to the total flow of each branch and the system operating status to adjust the speed of the circulating pump (6).

8. The working fluid collection and distribution device for a multi-source channel solar thermal collector field according to claim 7, characterized in that, The distribution manifold (3) and the confluence manifold (4) are respectively used to connect with the heat collection side (8) of the plate heat exchanger to form a heat collection side circulation loop.

9. The working fluid collection and distribution device for a multi-source channel solar thermal collector field according to claim 8, characterized in that, The heat collector side (8) of the plate heat exchanger is connected to the hot water storage body (9) through the circulation pump (6) to realize heat exchange between the heat collector side and the heat storage side.

10. The working fluid collection and distribution device for a multi-source channel solar thermal collector field according to claim 1, characterized in that, The single-channel independent adjustment module (2) adopts a standardized module structure and is configured to be increased or decreased according to the number of solar collector fields (1).

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