Solar air supply system

Abstract

The invention provides a solar air supply system which comprises a heat collection device, an outlet pipe, a loop pipe and a user, air is heated in the heat collection device, conveyed to a user inlet pipe through the outlet pipe and then enters the user for air supply, and then return air enters the heat collection device through the loop pipe for heating. A hot air adjusting device and a mixed air adjusting device are arranged in a user inlet pipe, the hot air adjusting device is located on the upstream of the mixed air adjusting device, a cold air input pipe is arranged between the hot air adjusting device and the mixed air adjusting device, and the hot air adjusting device and the mixed air adjusting device are of a multi-grid-piece structure. The adjacent grating pieces are of a split adjusting structure. The invention provides a novel solar air supply system, and further realizes a temperature equalizing effect.

Description

Technical Field

[0001] The invention belongs to the field of solar energy, and in particular relates to a solar energy air supply system. Background Art

[0002] With the rapid development of modern social economy, human beings have an increasing demand for energy. However, the reserves of traditional energy such as coal, oil, and natural gas are constantly decreasing and becoming increasingly scarce, causing prices to continue to rise. At the same time, the environmental pollution caused by conventional fossil fuels is becoming more and more serious, which greatly restricts the development of society and the improvement of human quality of life. The energy problem has become one of the most prominent problems in the contemporary world. Therefore, seeking new energy, especially pollution-free clean energy, has become a hot topic of research.

[0003] Solar energy is an inexhaustible clean energy source with huge resources. The total amount of solar radiation energy received by the earth’s surface each year is 1×10 18 kW·h, which is more than 10,000 times the world's total annual energy consumption. Countries around the world have already regarded the use of solar energy as an important part of new energy development. However, since the energy density of solar radiation reaching the earth is low (about 1 kilowatt per square meter) and it is discontinuous, this brings certain difficulties to large-scale development and utilization. Therefore, in order to widely use solar energy, not only technical problems must be solved, but also it must be able to compete with conventional energy in terms of economy.

[0004] In solar thermal wind systems, the stability and accuracy of wind volume measurement are crucial. It is one of the important factors to improve the economy and stability of thermal systems. However, the wind duct of the solar system generally has the problem of uneven flow velocity in the pipe. Due to the complexity of the actual operating conditions, the adverse flow diversion effect of the regulating device of the prior art on the flow field, the defects of the wind volume measuring instrument, etc., there are problems such as abnormal fluctuations in wind volume measurement and poor damper adjustment characteristics, which makes the primary air volume measurement deviate greatly from the actual. In recent years, the structure of the primary air duct system has become more and more compact, the distance of the primary air duct is shorter, and the existence of conventional regulating doors makes the flow field in the pipe more complicated, and even the phenomenon that the air volume measured by the wind volume measuring device and the damper opening change in the opposite direction occurs.

[0005] However, the current solution focuses on improving the accuracy of measuring instruments and installing more flow balancing devices, but does not fundamentally solve the problem caused by uneven upstream wind velocity. In addition, the additional installation of more flow balancing devices makes the primary air duct structure complicated, increases costs, and causes a larger pressure drop, increasing operating costs.

[0006] Therefore, based on the above problems, a new type of flow balancing device is needed, and the solar air supply duct needs to be improved to balance the flow, improve the flow field and temperature field state at the measuring device under the premise of small pressure loss, improve the accuracy and stability of the inlet air volume and temperature device measurement of the solar system air supply, and at the same time improve the heat exchange efficiency of the hot air and cold air mixed heat exchange system. Summary of the invention

[0007] The present invention provides a new solar energy wind supply system, thereby solving the above-mentioned technical problems.

[0008] In order to achieve the above object, the technical solution of the present invention is as follows: A solar air supply system, the system includes a heat collecting device, an outlet pipe, a loop pipe and a user, the air is heated in the heat collecting device, transported to the user's inlet pipe through the outlet pipe, and then enters the user for air supply, and then the return air enters the heat collecting device through the loop pipe for heating, characterized in that a hot air regulating device and a mixed air regulating device are arranged in the user's inlet pipe, wherein the hot air regulating device is located upstream of the mixed air regulating device, and a cold air input pipe is arranged between the hot air regulating device and the mixed air regulating device, and the hot air regulating device and the mixed air regulating device are multi-grid structure, and the adjacent grids are split regulating structures.

[0009] Preferably, the hot air regulating device and the mixed air regulating device are arranged in different directions, the grille pieces of the hot air regulating device open horizontally and the grille pieces of the mixed air regulating device open vertically, or the grille pieces of the hot air regulating device open vertically and the grille pieces of the mixed air regulating device open horizontally.

[0010] Preferably, a cold air regulating device is provided on the cold air inlet pipe, and the cold air regulating device is a multi-grid sheet structure, and the adjacent grid sheets are a split regulating structure.

[0011] As a preference, the grille angle can be finely adjusted according to the incoming flow velocity distribution state, and the adjustment method is as follows: a / A=э*(VV p ) / V p ; where a is the changing angle of the grid plate, V is the local velocity near the grid plate, V p is the average velocity of the cross section, and angle A is the current angle of the grid. Among them, э is a parameter, and the following data is taken: 0 <A<=30°,0.53<э<0.58; 30 <A<=60°,0.46<э<0.53; 60 <A<90°,0.42<э<0.46; The maximum angle A is 90°.

[0012] Preferably, as A increases, э decreases.

[0013] Compared with the prior art, the present invention has the following advantages: 1) Based on the existing solar wind duct, a creative inlet air volume regulation system with flow regulation, rectification and equalization functions is proposed. It includes two upstream and downstream multi-leaf split adjustment devices to achieve dual control and dual equalization, solving the problem from the source of uneven inlet air velocity. The equalization effect is obvious, which can improve the accuracy and stability of inlet air volume and temperature measurement, thereby improving the economy and stability of the system. In addition, the device has a simple structure, avoiding the problems of excessive pressure drop and increased operating costs caused by the additional installation of equalization devices in the existing equalization technology, and has high economic benefits; 2) Based on the existing solar energy system, a creative air supply system with flow regulation, rectification and flow equalization functions is proposed. By setting grille pieces and setting the grille pieces at different angles, the overall heat exchange efficiency of hot air and cold air mixed heat exchange is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the air supply system of the present invention; Figure 2 It is a schematic diagram of the structure of the air volume regulating heat exchange system of the present invention; Figure 3 It is a schematic diagram of a partial three-dimensional structure of the air volume regulating device of the present invention; Figure 4 It is a schematic diagram of the structure of a non-split grille piece; Figure 5 This is a schematic diagram of the structure of the split adjustable grille. DETAILED DESCRIPTION

[0015] The specific implementation modes of the present invention are described in detail below with reference to the accompanying drawings.

[0016] In this article, unless otherwise specified, “ / ” represents division, and “×” and “*” represent multiplication.

[0017] Figure 1 A solar air supply system is disclosed, which includes a heat collecting device 1, an outlet pipe 2, a loop pipe 3 and a user 4. The air is heated in the heat collecting device, transported to the user inlet pipe through the outlet pipe 2, and then enters the user 4 through the user inlet pipe for air supply. Then, the return air enters the heat collecting device through the loop pipe 3 for heating.

[0018] The outlet pipe 2 is connected to the user main pipe 5 , and the user hot air inlet pipe 6 is connected to the main pipe 5 .

[0019] A hot air regulating device (flow regulating device) 7 and a mixed air regulating device (flow regulating device) 8 are arranged in the user's hot air inlet duct 6, wherein the hot air regulating device 7 is located upstream of the mixed air regulating device 8, and a cold air input pipe 9 is arranged between the hot air regulating device 7 and the mixed air regulating device 8. The hot air regulating device and the mixed air regulating device are multi-grid structure, and the adjacent grids are split regulating structures.

[0020] like Figure 2 As shown, the cold air inlet duct 9 and the hot air inlet duct 6 are arranged vertically.

[0021] Adjust the indoor temperature by inputting cold air to avoid it being too high or too low.

[0022] like Figure 3 As shown in FIG. 5 , the hot air regulating device 7 is a grille structure, and a plurality of grille sheets are arranged on the grille structure, and the grille sheets are arranged perpendicular to the central axis direction of the cold air inlet duct.

[0023] On the basis of the existing solar thermal wind, a flow regulating system with flow regulating function, rectification and equalization function is creatively proposed. It contains two upstream and downstream split regulating devices to realize double control and double equalization, solving the problem from the source of uneven flow velocity of the inlet fluid. The equalization effect is obvious, which can improve the accuracy and stability of the inlet flow and temperature measurement, thereby improving the economy and stability of the heat exchange system. In addition, the device has a simple structure, avoiding the problems of excessive pressure drop and increased operating costs caused by the additional installation of equalization devices in the existing equalization technology, and has high economic benefits.

[0024] Preferably, a mixed air outlet duct 11 downstream of the hot air inlet duct 6 is provided with a mixed air regulating device 8, wherein the mixed air regulating device is a grille structure, wherein a plurality of grille sheets are provided in the grille structure, and the grille sheets are provided parallel to the central axis direction of the cold air inlet duct. When the regulating device is partially opened, each set of two opposing grille sheets can guide the flow to both sides. The flow regulating device 7 can diffuse the flow velocity in the horizontal direction, and the flow regulating device 8 can diffuse the flow velocity in the vertical direction; after the flow regulating devices 7 and 8 are combined, since the two sets of fluid gates are perpendicular to each other, the flow can be diffused in all four directions of horizontal and vertical directions, and the degree of homogenization is higher.

[0025] Preferably, a mixing device 12 is arranged downstream of the mixed wind regulating device, and the mixing device is a grid structure, and the grid structure includes a plurality of grids.

[0026] Preferably, multiple mixing devices are provided, and the mixing mechanism grille includes a parallel structure arranged in parallel with the central axis direction of the cold air inlet duct and a vertical structure arranged perpendicular to the central axis direction of the cold air inlet duct, and the parallel structure and the vertical structure are arranged alternately. After the mixing device is combined, since the two sets of fluid gates are perpendicular to each other, the flow can be diffused in four directions, horizontally and vertically, and the degree of homogenization is higher.

[0027] When adjacent grille sheets are not arranged in a split configuration, the angle between the grille and the central axis of the cold air inlet pipe is selected to be the angle formed by the cold air flow direction and the grille sheet extending downstream, for example Figure 4 The angle A.

[0028] Adjacent grille pieces of the hot air conditioning device have different inclination angles. As the distance from the cold air inlet duct increases, the angle between the grille piece and the cold air flow direction in the central axis direction of the cold air inlet duct becomes larger and larger.

[0029] Close to the cold air inlet, the cold air flow is the largest, the heat exchange temperature difference is the largest at this time, and the heat exchange is the best, which will lead to uneven heat exchange overall. The heat exchange is the best at the cold air outlet. As the distance from the outlet increases, the heat exchange becomes worse, which leads to poor overall heat exchange effect, forming a heat exchange similar to that of a downstream heat exchanger. As the distance from the cold air inlet increases, the cold air flow becomes smaller and smaller. The present invention improves the grille angle so that the hot air flow increases along the direction in which the cold air enters the fluid channel, and the heat exchange of the entire heat exchange area is balanced, forming a technical effect similar to that of countercurrent heat exchange, thereby improving the heat exchange efficiency overall.

[0030] Preferably, as the distance from the cold air inlet duct increases, the angle between the hot air conditioning device grille and the cold air flow direction in the direction of the central axis of the cold air inlet duct increases. By changing the angle, the heat exchange effect can be better improved and the overall heat exchange can be more uniform.

[0031] Preferably, the adjacent grilles are split and adjusted. Figure 3 , 5 Unless otherwise specified, the adjacent grilles described below are all grilles with split structures.

[0032] The fluid flow needs to be controlled. The split-open regulating fluid gate of the present invention has both flow balancing and flow regulating functions. In the past, ordinary fluid gates (fluid gates facing one direction) were generally used to control the flow, and orifice plates were used for flow balancing. However, ordinary fluid gates will divert hot air from one side to the other, which will aggravate the flow turbulence in the pipeline. Orifice plates will significantly reduce the flow area, resulting in greater resistance.

[0033] As long as the split fluid door is not close to the closed state, the impact on the flow area is small. The grille of the split fluid door will make the fluid bypass from both sides of the grille, instead of directing the flow to one side like the ordinary fluid door. In this process, a certain resistance will be applied to the flow, so that the flow velocity in the area with higher flow velocity is reduced, and the fluid is induced to pass through the area with lower flow velocity. In particular, the use of two sets of mutually perpendicular split fluid doors has a better flow balancing effect. At the same time, changing the angle of the split fluid door grille (the angle between the grille and the axis of the cold air duct) can also play a role in regulating the flow.

[0034] Preferably, the cold air flow regulating device 10 is a multi-grid structure, and the adjacent grids are split adjustment structures. By setting the split adjustment structure, the input cold air flow can be made uniform.

[0035] Preferably, the hot air regulating device 7, the cold air flow regulating device 10 and the mixed air regulating device 8 are independently regulated. When the fluid gate opening is different, the flow resistance is different and the flow balancing effect is also different. When the equipment can withstand a larger flow resistance, a smaller fluid gate opening can be used to achieve a better flow balancing effect.

[0036] Preferably, in the multi-leaf split adjustment, each grille can independently control the angle, preferably controlled by a servo motor, and independently adjustable. When the local flow velocity is too high, the nearby grilles can adopt a smaller angle, thereby increasing the local resistance, causing the gas to move in the direction of lower flow velocity, and further improving the uniformity of the flow field. The opening angle of each grille is controlled by a servo motor.

[0037] Preferably, the width of each grid of the multi-leaf split flow regulating device can be determined according to the actual distribution of the pipeline fluid. Preferably, the pipeline diameter is 9-11 times the grid spacing, preferably 10 times. Through the above dimensions, the flow equalization effect can be obvious, the accuracy and stability of the inlet flow and temperature measurement can be improved, and the economy and stability of the system can be improved. In addition, the device has a simple structure, which avoids the problems of excessive pressure drop and increased operating costs caused by the additional installation of flow equalization devices in the existing flow equalization technology, and has high economic benefits.

[0038] Furthermore, the flow regulating system not only has the flow regulating function but also has the functions of rectifying and balancing the flow due to its split form.

[0039] Furthermore, the flow regulation system can realize dual control and dual flow equalization to achieve better flow equalization effect. The hot air from the hot air inlet duct will first pass through the hot air regulating device. After passing through the flow regulating device, its rectification effect makes the hot air velocity distribution more uniform. Then the cold air is connected. Due to the different temperatures and speeds of the cold air, the speed and temperature unevenness after mixing increase. The mixed fluid passes through the second multi-leaf split flow regulating device again. After passing through the second flow regulating device, better speed and temperature uniformity can be achieved.

[0040] Furthermore, in the multi-leaf split flow regulating device, each grille angle is independently adjustable, and preferably the servo motor is used to control the opening of each grille angle. Since the grille has different pressure losses at different opening and closing angles, the rectification and flow equalization effects are different. Since the hot air main pipe and the hot air inlet pipe form a T-shaped structure, the hot air flowing in has uneven speed. Therefore, the grille angle can be finely adjusted according to the distribution state of the incoming flow speed. Preferably, the adjustment of the mixed air regulating device 8 is included.

[0041] Preferably, a / A=э*(VV p ) / V p ; where a is the changing angle of the grid plate, V is the local velocity near the grid plate, V p is the average velocity of the cross section, and angle A is the current angle of the grid. Among them, э is a parameter, and the following data is taken: 0 <A<=30°,0.53<э<0.58; 30 <A<=60°,0.46<э<0.53; 60 <A<90°,0.42<э<0.46; The maximum angle A is 90°.

[0042] Preferably, as A increases, э decreases.

[0043] When the angle of the grille is small (tending to be closed), the flow resistance is large; conversely, when the angle of the grille is large (tending to be open), the flow resistance is small; if the flow velocity is high at a certain place, the grille nearby should adopt a small angle (tending to be closed), which can induce the fluid to flow to the area with a large grille angle, achieving a flow balancing effect. If all grilles have the same angle, although the flow balancing effect can also be achieved, the effect is worse.

[0044] The above formula and parameters of the present invention are the best angle adjustment parameter formulas obtained through a large number of experiments and numerical simulations. Through the adjustment of the above angle, the best flow equalization effect can be achieved under minimum resistance.

[0045] Preferably, a velocity probe, such as a pitot tube, is placed near each grille, and the opening angle is the angle between the grille and the axis of the cold air duct, such as Figure 5 shown.

[0046] When adjacent grille sheets are arranged in a split configuration, the angle between the grille sheet and the central axis of the cold air inlet pipe (i.e., the grille angle) is selected to be an acute angle, such as Figure 5 shown.

[0047] Furthermore, the width of each grille of the multi-leaf split flow regulating device can be determined according to the actual pipeline fluid distribution, preferably the width = grille spacing, grille spacing = pipeline diameter / 10; this is because different grille sizes will also bring different pressure losses and different rectification and flow balancing effects, which can be determined according to the velocity distribution and temperature distribution of the incoming fluid to achieve a better flow balancing effect.

[0048] As an improvement, as the distance from the cold air inlet gets closer, the angle of the grille of the hot air regulating device gets larger. Close to the cold air inlet, the cold air flow is the largest, the heat exchange temperature difference is the largest at this time, and the heat exchange is the best, which will lead to uneven heat exchange overall, and the heat exchange at the cold air outlet is the best. As the distance from the outlet increases, the heat exchange becomes worse, which leads to poor overall heat exchange effect, forming a heat exchange similar to that of a downstream heat exchanger. As the distance from the cold air inlet increases, the flow of cold air becomes smaller and smaller. By improving the grille angle, the present invention makes the hot air flow larger and larger along the direction in which the cold air enters the fluid channel, and the heat exchange of the entire heat exchange area is balanced, forming a technical effect similar to countercurrent heat exchange, and improving the heat exchange efficiency as a whole.

[0049] As a preferred embodiment, as the distance from the cold air inlet gets closer, the angle of the hot air conditioning device grille increases. By changing the angle, the heat exchange effect can be better improved and the overall heat exchange can be more uniform.

[0050] As an improvement, as the distance from the cold air inlet gets closer, the size of the grille of the hot air regulating device gets larger and larger. Close to the cold air inlet, the cold air flow is the largest, the heat exchange temperature difference is the largest at this time, and the heat exchange is the best, which will lead to uneven heat exchange overall. The heat exchange at the cold air outlet is the best. As the distance from the outlet increases, the heat exchange becomes worse, which leads to poor overall heat exchange effect, forming a heat exchange similar to that of a downstream heat exchanger. As the distance from the cold air inlet increases, the flow of cold air becomes smaller and smaller. The present invention improves the size of the grille so that the size of the grille changes along the direction in which the cold air enters the fluid channel, so that the size of the grille is the largest at the distance from the cold air inlet, and the resistance is the largest, resulting in a reduction in flow, so that as the distance from the cold air outlet increases, the flow increases, so that the heat exchange of the entire heat exchange area is balanced, forming a technical effect similar to countercurrent heat exchange, and improving the heat exchange efficiency as a whole.

[0051] As a preference, as the distance from the cold air inlet gets closer, the size of the hot air conditioning device grille increases. By changing the size, the heat exchange effect can be better improved and the overall heat exchange can be more uniform.

[0052] As an improvement, as the distance from the cold air inlet gets closer, the distribution density of the grille of the hot air regulating device becomes larger and larger. Close to the cold air inlet, the cold air flow is the largest, the heat exchange temperature difference is the largest at this time, and the heat exchange is the best, which will lead to uneven heat exchange overall. The heat exchange at the cold air outlet is the best. As the distance from the outlet increases, the heat exchange becomes worse, which leads to poor overall heat exchange effect, forming a heat exchange similar to that of a downstream heat exchanger. As the distance from the cold air inlet increases, the flow of cold air becomes smaller and smaller. The present invention improves the distribution density of the grille so that the distribution density of the grille changes along the direction in which the cold air enters the fluid channel, so that the distribution of the grille at the distance from the cold air inlet is the largest, the resistance is the largest, and the flow rate is reduced, resulting in a reduction in flow rate. As the distance from the cold air outlet increases, the flow rate increases, so that the heat exchange of the entire heat exchange area is balanced, forming a technical effect similar to countercurrent heat exchange, and improving the heat exchange efficiency as a whole.

[0053] As a preference, as the distance from the cold air inlet gets closer, the distribution density of the hot air conditioning device grille increases. By changing the distribution density, the heat exchange effect can be better improved and the overall heat exchange can be more uniform.

[0054] As a preference, it further comprises a main pipeline, in which hot air is transported, and a plurality of hot air inlet pipelines 6 are connected in parallel to the main pipeline for operation, and along the flow direction of the hot air in the main pipeline, the angle between the hot air flow regulating device 7 in the hot air inlet pipeline 6 and the grille in the mixed air regulating device 8 is getting larger and larger. Because the flow resistance is getting smaller and smaller through the increasing angle of the grille, it can be ensured that the flow entering the hot air inlet pipeline 6 along the flow direction of the hot air in the main pipeline is kept uniform, and it is avoided that the flow of the hot air inlet pipeline 6 upstream is too large and the flow of the far end is too small.

[0055] Preferably, along the flow direction of the hot air in the main duct, the angle between the hot air flow regulating device 7 in the hot air inlet duct and the grille in the outlet air flow regulating device 7 increases. By changing the amplitude, the uniform flow distribution can be further ensured.

[0056] Preferably, a plurality of hot air inlet pipes 6 are connected in parallel to the main pipe for operation, and along the flow direction of the hot air in the main pipe, the distribution density of the grilles in the hot air flow regulating device 7 and the mixed air regulating device 8 in the hot air inlet pipe is getting smaller and smaller. Because the flow resistance is getting smaller and smaller through the smaller distribution density of the grilles, it can be ensured that the flow entering the hot air inlet pipe 6 along the flow direction of the hot air in the main pipe is kept uniform, avoiding excessive flow in the upstream hot air inlet pipe 6 and too small flow at the far end.

[0057] Preferably, along the flow direction of the hot air in the main duct, the distribution density angle of the grilles in the hot air flow regulating device 7 and the mixed air regulating device 8 in the hot air inlet duct is gradually reduced and increased. By changing the amplitude, the uniform flow distribution can be further ensured.

[0058] A temperature sensor is provided in the hot air duct, and a thermometer is provided downstream of the mixed air regulating device 8 of the hot air inlet duct 6 to detect the temperature of the hot air and the mixed heat-exchanged fluid respectively.

[0059] Preferably, a hot air flow meter is provided upstream of the flow regulating device 7 of the hot air inlet duct 6 to measure the amount of hot air entering the hot air inlet duct 6, and a cold air flow meter is provided on the cold air duct to measure the flow of the cold air.

[0060] Preferably, when the measured hot air flow rate is lower than a preset value, the controller controls the hot air flow regulating device 7 to open more, thereby increasing the amount of hot air entering. When the detected hot air flow rate is higher than a preset value, the controller controls the hot air flow regulating device 7 to open less, thereby reducing the amount of hot air entering.

[0061] Preferably, when the measured hot air temperature decreases, the controller controls the hot air flow regulating device 7 to increase its opening, thereby increasing the amount of hot air entering to meet the heat exchange requirement. When the detected hot air temperature increases, the controller controls the hot air flow regulating device 7 to decrease its opening, thereby reducing the amount of hot air entering. Through the above-mentioned mediation, energy saving requirements can be achieved, heat waste can be avoided, and heat exchange requirements can be met in a timely manner.

[0062] Preferably, when the temperature of the fluid after heat exchange is detected to be lower than a preset value, the controller controls the cold air flow regulating device 9 to increase its opening, and the controller controls the hot air flow regulating device 7 to decrease its opening, thereby increasing the amount of hot air entering and reducing the amount of cold air. When the detected hot air temperature is higher than a preset value, the controller controls the cold air flow regulating device 9 to decrease its opening, and the hot air flow regulating device 7 to increase its opening, thereby reducing the amount of hot air entering and increasing the amount of cold air. The above-mentioned mediation can achieve energy-saving requirements, avoid heat waste, and meet heat exchange requirements in a timely manner.

[0063] Preferably, when the temperature of the fluid after heat exchange is higher than the preset value, the controller controls the cold air flow regulating device 9 to increase the opening, thereby increasing the amount of cold air entering to meet the heat exchange requirement. When the temperature of the fluid after heat exchange is lower than the preset value, the controller controls the cold air flow regulating device 9 to decrease the opening, thereby reducing the amount of cold air entering to meet the heat exchange requirement. The above-mentioned adjustment can achieve energy-saving requirements, avoid heat waste, and meet the heat exchange requirements in a timely manner.

[0064] The flow regulating device of the grille split structure adjusts the fluid flow by adjusting the angle between the grille and the central axis of the cold air inlet pipe.

[0065] Preferably, the loop pipe includes a preheating pipe 36 .

[0066] Although the present invention has been disclosed as above with preferred embodiments, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A solar air supply system, the system includes a heat collecting device, an outlet pipe, a loop pipe and a user, the air is heated in the heat collecting device, transported to the user inlet pipe through the outlet pipe, and then enters the user for air supply, and then the return air enters the heat collecting device through the loop pipe for heating, characterized in that: A hot air regulating device and a mixed air regulating device are arranged in the user inlet pipe, wherein the hot air regulating device is located upstream of the mixed air regulating device, and a cold air input pipe is arranged between the hot air regulating device and the mixed air regulating device, and the hot air regulating device and the mixed air regulating device are multi-grid sheet structures, and the adjacent grid sheets are split regulating structures.

2. The solar wind system according to claim 1, characterized in that: The hot air regulating device and the mixed air regulating device are arranged in different directions, the grille pieces of the hot air regulating device are opened horizontally, and the grille pieces of the mixed air regulating device are opened vertically, or the grille pieces of the hot air regulating device are opened vertically, and the grille pieces of the mixed air regulating device are opened horizontally.

3. The solar wind system according to claim 1, characterized in that: A cold air regulating device is arranged on the cold air input pipe. The cold air regulating device is a multi-grid sheet structure, and the adjacent grid sheets are a split regulating structure.

4. The solar wind system according to claim 1, characterized in that: The grille angle can be finely adjusted according to the incoming flow velocity distribution. The adjustment method is as follows: a / A=э*(VV p ) / V p ; where a is the changing angle of the grid plate, V is the local velocity near the grid plate, V p is the average velocity of the cross section, angle A is the current angle of the grid plate; where э is a parameter, the following data is taken: 0 <A<=30°,0.53<э<0.58; 30 <A<=60°,0.46<э<0.53; 60 <A<90°,0.42<э<0.46; The maximum angle A is 90°.

5. The solar wind system according to claim 4, characterized in that: As A increases, э decreases.

6. A solar air supply system, the system comprising a heat collecting device, an outlet pipe, a loop pipe and a user, the air is heated in the heat collecting device, transported to the user through the outlet pipe for air supply, and then the return air enters the heat collecting device through the loop pipe for heating, characterized in that: A guide plate extending from the inner wall of the outlet pipe to the center of the outlet pipe is arranged in the outlet pipe.

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