CN108019963B - Intelligent non-scale solar water heater with adjustable illumination power of heat collecting plate - Google Patents

Abstract

The invention discloses a non-scale intelligent solar water heater with an adjustable illumination power of a heat collecting plate, which comprises a controller, the heat collecting plate with a built-in working medium, a water storage tank, a fixing frame and a driving motor. The heat collecting plate is connected with the fixing frame through a rotating shaft pivot, the driving motor is connected with the rotating shaft, a heat exchanger for heating water is arranged in the water storage tank, a circulating pump is arranged in a heating pipeline communicated between the heat collecting plate and the heat exchanger, and a radiator is connected to the heating pipeline in a bypass mode to form a heat radiating pipeline sharing the circulating pump with the heating pipeline; when the temperature of the water storage tank reaches a higher preset value, the controller controls the heat collection plate to rotate relative to the rotating shaft, the included angle between the heat collection plate and the sunlight is adjusted, the illumination power of the heat collection plate is reduced to the minimum value, the water temperature is prevented from being continuously increased, when the temperature of the working medium is too high, the heat is radiated and cooled through the radiator, and the phenomena that water scales are accumulated on the water storage tank and the heat exchanger, the heat collection plate is damaged due to the fact that the temperature of the working medium is too high, and even explosion occurs are effectively.

Description

Intelligent non-scale solar water heater with adjustable illumination power of heat collecting plate

Technical Field

The invention relates to a solar water heater, in particular to an intelligent non-scale solar water heater with an adjustable illumination power of a heat collecting plate.

Background

The application of the solar water heater is popularized to thousands of households, and as the service life of the solar water heater increases, scale is gradually formed on the inner wall of a water storage tank and a heat exchanger of the solar water heater, and the more the scale is accumulated, the smaller the volume of the water storage tank is, a water outlet is blocked, a valve is damaged, a shower nozzle is damaged, and the like. The scale on the heat exchanger causes low heat exchange efficiency, easily causes the temperature of the working medium in the heat collecting plate to be too high to damage the heat collecting plate, and even causes the explosion of the heat collecting plate. Therefore, there is a need to develop an intelligent solar water heater with an adjustable illumination power of a heat collecting plate, which can adjust the illumination power of the heat collecting plate to control the temperature intelligently so as to avoid the generation of scale.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a non-scale intelligent solar water heater with an adjustable light power of a heat collecting plate, which adjusts the light power of the heat collecting plate, intelligently controls the water temperature and prevents scale from being generated.

The technical scheme of the invention is as follows:

the utility model provides a collection thermal-arrest board illumination power adjustable does not have dirty intelligent solar water heater, its design point lies in: the solar water heater comprises a controller for controlling the solar water heater, a heat collecting plate with a built-in working medium, a water storage tank with a heat preservation function, a fixing frame for bearing the heat collecting plate, a driving motor, a circulating pump for driving the working medium to flow and a radiator for radiating the working medium; the heat collecting plate is connected with the fixing frame shaft through a rotating shaft, the heat collecting plate is fixed with the rotating shaft, and the driving motor is connected with the rotating shaft and is suitable for driving the heat collecting plate to rotate around the rotating shaft so as to adjust the illumination power of the heat collecting plate; the water storage tank is provided with a first temperature sensor for detecting the water temperature of the water storage tank, and a heat exchanger and an electric heater for heating water are arranged in the water storage tank; the heat collecting plate is provided with a light intensity sensor for detecting the solar illumination power received by the heat collecting plate; the output port of the heat collecting plate, the heat exchanger, the circulating pump and the input port of the heat collecting plate are communicated through pipelines to form a heating pipeline, the heating pipeline is suitable for circulating and transporting heat energy of a working medium and heating water in the water storage tank through heat exchange of the heat exchanger, and a first electromagnetic valve for controlling circulation and blocking state switching of the heating pipeline is assembled on the heating pipeline; the output port of the heat collecting plate, the radiator, the circulating pump and the input port of the heat collecting plate are communicated through a pipeline to form a heat radiating pipeline, the heat radiating pipeline is suitable for circulating and transporting heat energy of a working medium and radiating and cooling through the radiator, and a second electromagnetic valve for controlling the circulation and blocking state switching of the heat radiating pipeline is assembled on the heat radiating pipeline; the controller acquires the water temperature of the water storage tank based on the first temperature sensor, when the water temperature of the water storage tank reaches a first preset value, the controller acquires the illumination power of the heat collection plate based on the light intensity sensor, operates the driving motor to rotate, and adjusts the included angle between the heat collection plate and the sunlight line to reduce the illumination power of the heat collection plate until the illumination power value fed back by the light intensity sensor is the minimum, so that the water temperature in the water storage tank is prevented from rising, and scale deposition on the inner wall of the water storage tank and the heat exchanger is prevented.

In application, the invention also has the following optional technical scheme.

Optionally, the connection between the driving motor and the rotating shaft includes any one of connection between the driving motor and the rotating shaft through a speed reducer, connection between the driving motor and the rotating shaft through a gear mechanism, and connection between an output shaft of the driving motor and the rotating shaft.

Optionally, when the temperature of the water in the water storage tank rises to the first preset value, the controller may further operate the first solenoid valve to block the circulation of the heating pipeline and operate the second solenoid valve to circulate the heat dissipation pipeline, the working medium with the higher temperature in the heat collection plate flows through the heat sink to dissipate heat, so as to form the working medium with the lower temperature, and the working medium flows back into the heat collection plate through the heat dissipation pipeline, so as to prevent the temperature of the water in the water storage tank from rising, and prevent the water scale from being deposited on the inner wall of the water storage tank and the heat exchanger.

Optionally, a second temperature sensor for detecting the temperature of the working medium is mounted on the heat collecting plate, and the controller obtains the temperature of the working medium based on the second temperature sensor; when the temperature of the water in the water storage tank reaches a first preset value, the controller controls the circulating pump to stop running, when the temperature of the working medium is higher than a second preset value, the controller controls the second electromagnetic valve to act to enable the heat dissipation pipeline to circulate, the circulating pump is controlled to start, the working medium flows through the radiator to cool until the temperature of the working medium is reduced to a third preset value, and the second preset value is larger than the first preset value.

Optionally, a second temperature sensor for detecting the temperature of the working medium is mounted on the heat collecting plate; the controller acquires the water temperature of the water storage tank based on the first temperature sensor and the temperature of the working medium based on the second temperature sensor, when the difference between the temperature of the working medium and the water temperature of the water storage tank reaches a first heat exchange threshold value, the controller operates the first electromagnetic valve to act to enable the heating pipeline to circulate, operates the circulating pump to start, heats the water in the water storage tank by the working medium flowing through the heat exchanger, and operates the circulating pump to stop until the difference between the temperature of the working medium and the water temperature of the water storage tank reaches a second heat exchange threshold value, wherein the first heat exchange threshold value is larger than the second heat exchange threshold value; when the difference between the temperature of the working medium and the water temperature of the water storage tank reaches a first heat exchange threshold and the water temperature of the water storage tank reaches a first preset value, the controller operates the second electromagnetic valve to act to enable the heat dissipation pipeline to circulate, operates the circulating pump to start, and enables the working medium to flow through the heat dissipater to dissipate heat and reduce the temperature until the difference between the temperature of the working medium and the water temperature of the water storage tank reaches a second heat exchange threshold; preferably, when the water temperature of the water storage tank reaches a first preset value and the temperature of the working medium is higher than a second preset value, the controller operates the second electromagnetic valve to act to enable the heat dissipation pipeline to circulate, the circulating pump is operated to start, and the working medium flows through the heat radiator to dissipate heat and cool until the temperature of the working medium reaches a third preset value.

Optionally, a flow sensor is arranged in a hot water output pipeline of the water storage tank and is suitable for judging whether a user uses water or not; in the process of heating water by circulating the heating pipeline, when the controller acquires that the water outlet flow value of the water storage tank is a non-zero value based on the flow sensor, the controller controls the heating pipeline to block, stops heating the water, and controls the heating pipeline to circulate to continue heating the water until the water outlet flow value is a zero value; in the process of suspending heating of the water, if the temperature of the working medium is higher than a second preset value, the controller controls the heat dissipation pipeline to circulate, and the working medium flows through the radiator to be cooled until the temperature of the working medium is lower than the second preset value.

Optionally, the radiator comprises the cooling tube at least, the cooling tube extends from the top down along the helix direction, and the axis of this helix is arranged upright, and the spiral radius reduces from the top down in proper order, and the cooling tube is the round platform form of handstand, and the lower extreme of cooling tube is working medium's input port, and the upper end is working medium's delivery outlet.

Optionally, the radiator still includes the drainage piece that is used for reinforcing convection current effect, the drainage piece is vertically arranged, is radial distribution around the axis of cooling tube, and the drainage piece quilt the cooling tube runs through, the drainage piece with the cooling tube is laminated and is fixed mutually.

Optionally, the radiator further comprises a flow guide screen which is formed by side walls and is in an inverted conical surface shape, an outward flange which is matched with the top end surface of the flow guide sheet and extends outwards from the top end is arranged at the top end of the flow guide screen, an accommodating space for accommodating the flow guide screen is defined by the inner side edge of the flow guide sheet, which is located on the axial side of the heat dissipation pipe, the flow guide screen extends into the accommodating space and is assembled with the flow guide sheet, and the outward flange covers the top end surface of the flow guide sheet; the outer side edge of the drainage sheet of the radiator is provided with a cylindrical isolation cylinder, the outer side edge of the drainage sheet is attached to the inner side wall of the isolation cylinder, and the upper end of the isolation cylinder is lower than the upper end part of the drainage sheet.

The other technical scheme of the invention is as follows:

the utility model provides a collection thermal-arrest board illumination power adjustable does not have dirty intelligent solar water heater, its design point lies in: a circulating pump for medium flowing and a radiator for radiating the working medium; the heat collecting plate is connected with the fixed frame shaft through the rotating shaft, and the driving motor is connected with the rotating shaft and is suitable for driving the heat collecting plate to rotate around the rotating shaft so as to adjust the illumination power of the heat collecting plate; the water storage tank is provided with a first temperature sensor for detecting the water temperature of the water storage tank, and a heat exchanger and an electric heater for heating water are arranged in the water storage tank; the heat collecting plate is provided with a light intensity sensor for detecting the illumination power of the heat collecting plate subjected to solar radiation; the output port of the heat collecting plate, the heat exchanger, the circulating pump and the input port of the heat collecting plate are communicated to form a heating pipeline, the heating pipeline is suitable for circulating and transporting heat energy of a working medium and heating water in the water storage tank through heat exchange of the heat exchanger, and a first electromagnetic valve for controlling circulation and blocking state switching of the heating pipeline is assembled on the heating pipeline; the output port of the heat collecting plate, the radiator, the circulating pump and the input port of the heat collecting plate are communicated to form a heat radiating pipeline, the heat radiating pipeline is suitable for circulating and transporting heat energy of a working medium and radiating and cooling through the radiator, and a second electromagnetic valve for controlling the circulation and blocking state switching of the heat radiating pipeline is assembled on the heat radiating pipeline; the controller acquires the water temperature of the water storage tank based on the first temperature sensor, when the water temperature of the water storage tank is lower than the lower limit value of a preset temperature range, the controller acquires the illumination power of the heat collection plate based on the light intensity sensor, controls the driving motor to rotate, adjusts the included angle between the heat collection plate and the sunlight until the illumination power value of the heat collection plate is maximum, when the water temperature of the water storage tank reaches the lower limit value of the preset temperature range, the controller acquires the illumination power of the heat collection plate based on the light intensity sensor, controls the driving motor to rotate to reduce the illumination power of the heat collection plate, until the illumination power value fed back by the light intensity sensor is reduced to the preset illumination power value, the water temperature of the water storage tank is slowly increased, when the water temperature reaches the upper limit value of the preset temperature range, the controller controls the first electromagnetic valve to act to block the circulation of the heating pipeline, controls the driving motor, so as to prevent the water temperature in the water storage tank from rising and avoid the formation of scale.

The invention adopts another technical scheme as follows:

the utility model provides an intelligence control system for solar water heater, solar water heater includes thermal-arrest board, the storage water tank of built-in working medium and is set up the heat exchanger to water heating with the heat transfer mode in the storage water tank, its design essential lies in: the intelligent control system comprises: the solar water heater comprises a radiator for radiating working media, a circulating pump for driving the working media to flow, a first temperature sensor for detecting the water temperature of a water storage tank, a second temperature sensor for detecting the temperature of the working media in a heat collection plate, a driving device for driving the heat collection plate to rotate, a light intensity sensor for detecting the illumination power of the heat collection plate, a controller suitable for controlling the solar water heater, a first electromagnetic valve and a second electromagnetic valve, wherein the first electromagnetic valve is arranged in a heating pipeline formed by communicating at least the heat collection plate, a heat exchanger and the circulating pump; the second electromagnetic valve is arranged in a heat radiation pipeline which is formed by communicating at least a heat collection plate, a radiator and a circulating pump; the controller acquires the water temperature of the water storage tank based on the first temperature sensor, when the water temperature of the water storage tank is lower than the lower limit value of the preset temperature range, the controller obtains the illumination power of the heat collecting plate based on the light intensity sensor, operates the driving device to operate, adjusts the included angle between the heat collecting plate and the sunlight until the illumination power value of the heat collecting plate fed back by the light intensity sensor is maximum, when the water temperature of the water storage tank reaches the lower limit value of the preset temperature range, the controller controls the driving device to operate to reduce the illumination power of the heat collecting plate until the illumination power value fed back by the light intensity sensor is reduced to the preset illumination power value, so that the water temperature of the water storage tank is slowly increased, when the water temperature reaches the upper limit value of the preset temperature range, the controller controls the first electromagnetic valve to act to block the circulation of the heating pipeline and controls the driving device to operate until the value of the illumination power fed back by the light intensity sensor is the minimum value; when the heating pipeline is blocked to circulate, the controller obtains the temperature of the working medium based on the second temperature sensor, when the temperature of the working medium is higher than a second preset value, the second electromagnetic valve is operated to enable the heat dissipation pipeline to circulate, the working medium flows through the radiator to be cooled until the temperature of the working medium is reduced to a third preset value, and the third preset value is smaller than the second preset value.

Compared with the prior art, the invention has the beneficial effects that:

according to the solar water heater, the controller obtains the water temperature of the water storage tank, when the water temperature of the water storage tank reaches the first preset value, the controller operates the driving motor to rotate, the included angle between the heat collecting plate and the sunlight line is adjusted, the illumination power of the heat collecting plate is reduced, the illumination power of the heat collecting plate is minimized, the water temperature in the water storage tank is prevented from rising, the water temperature is kept at the first preset value, scales are effectively prevented from being accumulated on the water storage tank and the heat exchanger, the heat exchange efficiency of the heat exchanger is kept high, the problems that the volume of the water storage tank is reduced and the water outlet is blocked due to the scales are prevented from being accumulated, and the damage and even explosion of the heat collecting plate due to the fact that the temperature.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a solar water heater according to an embodiment.

FIG. 2 is a schematic view illustrating an assembling relationship between the heat collecting plate and the fixing frame.

FIG. 3 is a schematic view of another view of the heat collecting plate and the fixing frame in FIG. 2.

Fig. 4 is a front cross-sectional schematic view of a heat sink.

Fig. 5 is a schematic top view of a heat sink.

Fig. 6 is a schematic view of a convective flow field of the heat sink.

Fig. 7 is a schematic structural diagram of a flow guide screen.

Fig. 8 is a control schematic diagram of a solar water heater according to an embodiment.

The system comprises a heat collecting plate 10, a water storage tank 20, a heat exchanger 21, a circulating pump 30, a radiator 40, a radiating pipe 41, a flow guiding sheet 42, a flow guiding screen 43, a 431 flanging, a 44 isolating cylinder, a temperature sensor group 50, a first temperature sensor 51, a second temperature sensor 52, a flow sensor 60, an electromagnetic valve group 70, a first electromagnetic valve 71, a second electromagnetic valve 72, a third electromagnetic valve 73, a liquid level sensor 80, an electric heater 90, a light intensity sensor 100, a fixing frame 200, a driving motor 201, a speed reducer 202, a rotating shaft 203 and a bearing seat 204.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. The directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship between the components, the movement, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly.

As an embodiment of the present invention, an intelligent solar water heater without scale with adjustable light power of heat collecting plate is shown in fig. 1, fig. 2 and fig. 3, and the solar water heater is a split structure and includes a heat collecting plate 10, a water storage tank 20, a heat exchanger 21, a circulation pump 30, a heat sink 40, an electric heater 90, a fixing frame 200, a driving motor 201 and a controller. The heat collecting plate 10 is provided with a working medium inside, and may be a tube type heat collecting plate, and the heat collecting plate 10 is used to convert light energy into heat energy and store the heat energy in the working medium, and the tube type heat collecting plate may also be replaced by a plate type heat collecting plate. The water storage tank 20 is covered with a heat insulation layer and has heat insulation performance. A heat exchanger 21 is installed inside the water storage tank 20, and a working medium flows through the heat exchanger 21 to heat water in the water storage tank through a heat exchange manner; the inside of the water storage tank 20 is also equipped with an electric heater 90 for electrically heating water in the water storage tank so that a user can normally use hot water even in rainy days. The heat exchanger 21 and the electric heater 90 are positioned at the lower part of the water storage tank. An output pipeline for outputting hot water is arranged at the bottom of the water storage tank 20, a flow sensor 60 is arranged in the hot water output pipeline and is used for detecting the water outlet flow of the hot water so as to judge whether the user has water or not, when the water outlet flow value is zero, the judgment that the user does not use water is made, and when the water outlet flow value is non-zero, the judgment that the user uses water is made; an input pipeline for cold water supplement is arranged at the top of the water storage tank 20, a third electromagnetic valve 73 is arranged on the input pipeline and used for controlling the communication of the input pipeline and blocking the communication state, and automatic water supplement is performed when the input pipeline is communicated. The reservoir 20 is equipped with a level sensor 80 for detecting the level of the reservoir. The radiator 40 is used for radiating the heat of the working medium with a higher temperature in the heat collecting plate 10 to lower the temperature of the working medium, so that the temperature of the working medium is within a safe temperature range for keeping the heat collecting plate 10 normally working; so as to avoid the damage and even explosion of the heat collecting plate caused by the high pressure formed in the heat collecting plate due to the high temperature gasification of the working medium. The circulating pump 30 is used for driving the working medium to flow and transporting heat, the working medium flows through the heat exchanger 21 for heat exchange to heat water in the water storage tank, and the working medium flows through the radiator for heat dissipation and temperature reduction. The fixing frame 200 is used for carrying the heat collecting plate 10, and the heat collecting plate 10 is fixed with the building by the fixing frame 200.

The heat collecting panel 10 is connected to the fixing frame 200 through a rotating shaft 203, as shown in fig. 2 and 3, it can be understood that the heat collecting panel 10 is fixed to the rotating shaft 203, and the driving motor 201 is connected to the rotating shaft 203 and adapted to drive the heat collecting panel 10 to rotate relative to the fixing frame 200 to adjust the light power of the heat collecting panel 10 irradiated by the sunlight. Specifically, a shaft sleeve is fixed on a mounting frame of the heat collecting plate 10 positioned on the backlight surface of the heat collecting plate, the heat collecting plate 10 is fixedly connected with a rotating shaft 203 through the shaft sleeve, and the rotating shaft 203 has no freedom of movement relative to the heat collecting plate 10; the bearing arms of the fixing frame 200 located at both sides are respectively provided with bearingsA base 204, said rotating shaft 203 being axially assembled and fixed with said bearing base 204 through a bearing, the heat collecting plate 10 being axially connected with the fixing frame 200, the heat collecting plate 10 being rotatable around the rotating shaft 203 with respect to the fixing frame 200, and changing an angle between a light receiving surface of the heat collecting plate 10 and a solar ray, which is labeled β, to adjust the light power of the heat collecting plate, the light power received by the light receiving surface of the heat collecting plate 10 can be determined by a formula

Where P is the light power of the heat collecting plate 10,

β is the angle between the sunlight and the normal line of the surface of the light receiving surface of the heat collecting plate 10, i.e. the angle between the sunlight and the surface direction of the heat collecting plate, which is the intensity of the sunlight per unit area when the sunlight is vertically irradiated

It can be known that, when the sunlight forms an angle of 90 degrees with the normal plane of the light receiving surface of the heat collecting plate 10, the illumination power of the heat collecting plate 10 is the minimum and is close to 0 value, and the sunlight is parallel to the light receiving surface of the heat collecting plate 10.

It should be noted that, the shaft connection between the driving motor 201 and the rotating shaft 203 may be understood that the driving motor 201 is connected with the rotating shaft 203 through a speed reducer, the driving motor 201 is connected with the rotating shaft 203 through a gear mechanism, and an output shaft of the driving motor 201 is directly connected with the rotating shaft 203, that is, the specific way of connecting the driving motor 201 and the rotating shaft 203 may be any one of the three shaft connection ways.

The output port of the heat collecting plate 10, the heat exchanger 21 located in the water storage tank 20, the circulating pump 30, and the input port of the heat collecting plate 10 are communicated through a pipeline to form a heating pipeline, so that the working medium is suitable for circulating through the heating pipeline to transport heat energy and flows through the heat exchanger 21 to heat water in the water storage tank 20, as shown in fig. 1, under the suction driving action of the circulating pump 30, the working medium can flow through the heat exchanger 21 and heat water in the water storage tank in a heat exchange manner. The heating pipeline is provided with a first electromagnetic valve 71, and the first electromagnetic valve 71 is used for controlling the switching of the flowing and blocking states of the heating pipeline. The output port of the heat collecting plate 10, the radiator 10, the circulating pump 30 and the input port of the heat collecting plate 10 are communicated through a pipeline to form a heat radiating pipeline. The heat dissipation pipeline is provided with a second electromagnetic valve 72 for controlling the switching of the circulation and blocking states of the heat dissipation pipeline. The heating pipeline and the heat dissipation pipeline share the circulating pump 30, the circulating pump 30 is located at the input port side of the heat collection plate 10, the circulating pump 30 forces the working medium to flow in the heating pipeline or the heat dissipation pipeline, and the working medium is used for transporting heat to heat water in the water storage tank or heat dissipation of the working medium flowing through the heat sink in a heat exchange manner to cool the water. A first temperature sensor 51 is arranged on the water storage tank 20 and used for detecting the water temperature in the water storage tank; the heat collecting plate 10 is provided with a second temperature sensor 52 for sensing the temperature of the working medium inside the heat collecting plate.

The controller collects a detection signal of the first temperature sensor 51, obtains the water temperature of the water storage tank based on the detection signal of the first temperature sensor 51, when the water temperature of the water storage tank 20 is lower than a first preset value, the controller operates the first electromagnetic valve 71 to act to circulate the heating pipeline, under the suction driving of the circulating pump 30, the working medium with higher temperature flowing out of the output port of the heat collection plate circularly flows through the heating pipeline, and passes through the heat exchanger 21 to exchange heat to heat the water in the water storage tank 20, so that the water temperature is gradually increased, and the working medium with lower temperature flowing out of the heat exchanger 21 flows back into the heat collection plate 10 through the heating pipeline. The water temperature of the water storage tank is gradually increased, when the water temperature of the water storage tank 20 reaches a first preset value, the controller collects a detection signal of the light intensity sensor 100, obtains the illumination power of the heat collecting plate 10 based on the detection signal of the light intensity sensor 100, and operates the driving motor 201 to rotate, the driving motor 201 drives the heat collecting plate 10 to rotate around the rotating shaft 203, so as to change the sandwich between the light receiving surface of the heat collecting plate 10 and the sunlight, adjust the illumination power of the heat collecting plate 10 irradiated by the light to reduce the illumination power of the heat collecting plate 10 until the illumination power value fed back by the light intensity sensor 100 is a minimum value, the minimum value is associated with the ambient temperature and the surface condition of peripheral objects, is usually not zero value, so as to prevent the water temperature in the water storage tank 20 from increasing, enable the water temperature to be not higher than the first preset value, and effectively. The first preset value can be understood as any higher temperature value which does not generate scale, can be 65 ℃, and the temperature of water in the water storage tank is not higher than 65 ℃, so that the scale can be prevented from being formed on the inner wall of the water storage tank and the heat exchanger, the heat exchange efficiency of the heat exchanger is ensured, and the blockage of a hot water outlet of the water storage tank due to scale deposition is effectively avoided.

As a further scheme, when the water temperature in the water storage tank 20 reaches the first preset value, the controller optionally operates the first electromagnetic valve 71 to operate to block the circulation of the heating pipeline, operate the circulation pump 30 to stop operating, suspend the heating of the water in the water storage tank in a heat exchange manner, and when the water temperature in the water storage tank is lower than the first preset value, operate the heating pipeline again to circulate the water in the water storage tank again in a heat exchange manner, so as to reduce the operating time of the circulation pump 30 and save electric energy.

It should be noted that, in the process of the controller operating the rotation of the heat collecting plate, when the illumination power value fed back by the light intensity sensor 100 is decreased from large to small and then increased from small to minimum, the controller operates the heat collecting plate to rotate in reverse, and then the illumination power value fed back by the light intensity sensor is decreased from large to stop when reaching the last minimum, and then the illumination power of the heat collecting plate in the posture at this time is considered to be minimum, and the position posture where the illumination power of the heat collecting plate is the maximum can be determined in the same manner.

When the water temperature in the water storage tank reaches the first preset value, the controller collects a detection signal of the second temperature sensor 52, and obtains the temperature of the working medium of the heat collection plate 10 based on the detection signal of the second temperature sensor 52, when the temperature of the working medium reaches the second preset value, the controller operates the second electromagnetic valve 72 to operate to circulate the heat dissipation pipeline, and operates the circulation pump 30 to start, under the suction driving action of the circulation pump 30, the working medium with higher temperature flowing out of the heat collection plate 10 circulates the heat dissipation pipeline, the working medium flows through the radiator 40 to dissipate heat, so as to form the working medium with lower temperature, and flows back into the heat collection plate 10 through the heat dissipation pipeline, until the temperature of the working medium is reduced to the third preset value, the controller operates the second electromagnetic valve 72 to operate to block the circulation of the heat dissipation pipeline, and operates the circulation pump 30 to stop operating. The second preset value is greater than the first preset value, the first preset value can be understood as any temperature value without generating scale, and the second preset value can be understood as the maximum temperature allowed by the working medium when the heat collecting plate 10 normally works, so as to prevent the working medium from gasifying at high temperature and forming high pressure in the heat collecting plate, which leads to damage of the heat collecting plate and even explosion of the heat collecting plate.

In order to save pipelines and simplify pipelines, as shown in fig. 1, the first electromagnetic valve 71 and the second electromagnetic valve 72 are respectively communicated with the output port of the heat collecting plate 10 through a three-way pipe, the output port of the radiator 40 and the output port of the heat exchanger 21 are respectively communicated with the input port of the circulating pump 30 through a three-way pipe, and the output port of the circulating pump 30 is communicated with the input port of the heat collecting plate 10. The heat pipe is formed by sequentially communicating an output port of the heat collecting plate 10, a first three-way pipe (left side in fig. 1), a second electromagnetic valve 72, the radiator 40, a second three-way pipe (right side in fig. 1), the circulating pump 30 and an input port of the heat collecting plate 10 through pipes, and the heating pipe is formed by sequentially communicating an output port of the heat collecting plate 10, a first three-way pipe (left side in fig. 1), a first electromagnetic valve 71, the heat exchanger 21 of the water storage tank 20, a second three-way pipe (right side in fig. 1), the circulating pump 30 and an input port of the heat collecting plate 10 through pipes. In order to improve the heat radiation effect and reduce the operation time of the circulation pump 30, the radiator 40 is mounted at the female side of the heat collecting plate 10.

The 1 st temperature sensor 51, the second temperature sensor 52, the first electromagnetic valve 71, the second electromagnetic valve 72, the third electromagnetic valve 73, the circulating pump 30, the flow sensor 60, the liquid level sensor 80 and the electric heater 90 are respectively electrically connected with the controller, and the controller controls the operation state thereof, as shown in fig. 8. The controller controls the heat collecting plate to rotate based on the acquired temperature of the working medium in the heat collecting plate, the water temperature of the water storage tank and the illumination power of the heat collecting plate, adjusts the illumination power of light received by the heat collecting plate, controls the heating state, and automatically controls the water temperature in the water storage tank to be lower than the first preset value, preferably not higher than 65 ℃, so that scale can be effectively prevented from being generated on the inner wall of the water storage tank and the heat exchanger, the heat exchanger has good heat exchange efficiency, and the phenomenon that the heat collecting plate is damaged or even exploded due to overhigh temperature of the working medium caused by low heat exchange efficiency due to scale deposition of the heat exchanger is avoided. The first solenoid valve 71, the second solenoid valve 72 and the third solenoid valve 73 form a solenoid valve group 70, and the 1 st temperature sensor 51 and the second temperature sensor 52 form a temperature excess sensor group 50. The first solenoid valve 71, the second solenoid valve 72, and the third solenoid valve 73 are normally closed solenoid valves that remain blocked in the power-off state.

In order to reduce the operation time of the circulating pump 30 and save the power consumption, a temperature difference control mode is further adopted to control the on/off of the circulating pump 30, and the water and the working medium in the water storage tank are heated for heat dissipation. The controller collects the detection signals of the first temperature sensor 51 and the second temperature sensor 52, and respectively obtains the water temperature of the water storage tank 20 and the temperature of the working medium in the heat collecting plate 10 based on the detection signals of the first temperature sensor 51 and the second temperature sensor 52. When the water temperature in the water storage tank 20 is lower than the first preset value, the water in the water storage tank needs to be heated, when the difference between the temperature of the working medium and the water temperature in the water storage tank reaches a first heat exchange threshold value, the controller operates the first electromagnetic valve 71 to be powered on to be opened for circulation, the second electromagnetic valve 72 is powered off to keep the circulation, the heating pipeline is communicated, the working medium can circulate in the heating pipe flow, the controller operates the circulating pump 30 to be powered on to be started, a driving force for the working medium to flow is formed in the heating pipeline, the working medium flows through the heat exchanger 21 to heat the water in the water storage tank 20 in a heat exchange mode until the difference between the temperature of the working medium in the heat collecting plate 10 and the water temperature in the water storage tank 20 reaches a second heat exchange threshold value, or when the water temperature in the water storage tank 20 reaches the first preset value, the controller operates the first electromagnetic valve 71 to be powered off to keep the, the heating pipeline is blocked to circulate, the controller controls the circulating pump 30 to stop running when power is lost, and the working medium stops flowing. So far, the process of heating the water in the water storage tank is completed once. The first heat exchange threshold is greater than the second heat exchange threshold, for example, as an optional scheme, the first heat exchange threshold may be 10 ℃ and the second heat exchange threshold may be 3 ℃. That is, when the difference between the temperature of the working medium in the heat collecting plate and the temperature of the water in the water storage tank reaches 10 ℃, the above-mentioned heating line is circulated, the circulation pump 30 is started, and the working medium circulates the heat exchanger to heat the water in the water tanks; when the difference between the temperature of the working medium in the heat collecting plate and the water temperature of the water storage tank is less than 3 ℃, the circulation pump 30 is stopped, the circulation of the heating pipeline is blocked, and the working medium does not circulate to heat the water. By adopting a temperature difference control mode, on one hand, the running time of the circulating pump 30 can be effectively reduced, and electric energy is saved; on the other hand, the larger the temperature difference is, the higher the heat exchange efficiency is, the longer the operation time of the circulation pump 30 can be effectively reduced, and the power consumption can be further saved. Repeating the steps, heating the water in the water storage tank and gradually increasing the water temperature. When the water temperature in the water storage tank reaches a first preset value, the water temperature can be understood as any temperature value which is not easy to generate scale, such as 65 ℃, the water in the water storage tank is stopped to be heated, and the temperature of the water is maintained at the first preset value; in order to reduce the speed of the temperature rise of the working medium of the heat collecting plate, the controller operates the driving motor 201 to operate, and the light irradiation power of the heat collecting plate 10 is adjusted to the minimum value in the above manner, the light irradiation power of the heat collecting plate is the minimum, and the temperature rise of the working medium is the slowest. When the difference between the temperature of the working medium and the temperature of the water in the water storage tank reaches the first heat exchange threshold value, the controller does not operate the heating pipeline to circulate any more, and does not heat the water in the water storage tank, so that the water is maintained at the first preset value, and the water scale is prevented from being generated on the inner wall of the water storage tank and the heat exchanger.

Further, in the process of operating the heating pipeline to heat water by the controller, the controller also collects a detection signal of the flow sensor 60, and acquires a water flow value based on the detection signal of the flow sensor 60. When the difference between the temperature of the working medium and the water temperature of the water storage tank reaches the first heat exchange threshold value, the controller controls the heating pipeline to block communication to suspend heating the water in the water storage tank when the water outlet flow value is not zero, namely when a user uses water, the controller controls the heating pipeline to block communication to suspend heating the water in the water storage tank, and if the circulating pump 30 can be controlled to be closed, or the first electromagnetic valve can be controlled to block circulation to suspend heat exchange and heating the water; when the water outlet flow value is zero, namely when the user does not use water, the heating pipeline is operated to be communicated to continuously heat the water in the water storage tank. By the control, the situation that a user uses water while heating can be avoided, the water temperature of the user is higher, the ratio of cold water to hot water needs to be adjusted ceaselessly, and inconvenience is brought. During the heat exchange water heating suspension period, if the temperature of the working medium is higher than the second preset value, the controller controls the heat dissipation pipeline to circulate, the working medium flows through the radiator to be cooled until the temperature of the working medium is lower than the second preset value, the heat exchange water heating can be started at any time, and the temperature can be optionally reduced to the third preset value, so that the starting and stopping times of the circulating pump 30 can be reduced, the heat dissipation pipeline is controlled to block circulation, and the heat dissipation is stopped. By the control, the working medium can be prevented from forming high pressure in the heat collecting plate due to high-temperature gasification, so that the heat collecting plate is prevented from being damaged and even exploded.

In the above-mentioned process of stopping heating the water by heat exchange when the water temperature reaches the first preset value, in order to avoid the damage of the heat collecting plate by the working medium due to high temperature, when the temperature of the working medium in the heat collecting plate 10 is higher than the second preset value, for example, the second preset value may be 115 ℃, the controller operates the second solenoid valve 72 to be turned on to form a circulation path, the heat dissipating pipeline forms a circulation path, the controller operates the circulating pump 30 to be powered on to be started, the working medium flows through the heat dissipating pipeline through the radiator 40 to exchange heat with the air under the suction driving of the circulating pump 30, the temperature of the working medium is lowered to form a working medium with a lower temperature, the working medium with the lower temperature flows back into the heat collecting plate 10 through the heat dissipating pipeline, and the circulation is performed until the temperature of the working medium in the heat collecting plate reaches the third preset value, the controller controls the second electromagnetic valve 72 to lose power and close to block the circulation, the heat dissipation pipeline is blocked, the controller controls the circulating pump 30 to lose power and stop moving, and the working medium does not flow. Therefore, the process of radiating the working medium is completed once, the temperature of the working medium is reduced to be within the safe temperature range, the damage and even explosion of the heat collecting plate caused by the high pressure formed in the heat collecting plate by the working medium due to high-temperature gasification are avoided, and the service life of the heat collecting plate is favorably prolonged. The third preset value can be understood as any lower temperature value allowed by the working medium when the heat collecting plate normally works, and in order to reduce the number of times of starting the circulating pump 30 and save electric energy, the third preset value can be a value slightly higher than the first preset value, for example, if the first preset value is 65 ℃, the third preset value can be 75 ℃. Therefore, when the water temperature reaches the first preset value, the driving motor is operated to minimize the light power of the heat collecting plate, so that the circulating pump 30 needs to be started less times to dissipate heat of the working medium, and the operation time is greatly reduced, which is beneficial to saving electric energy.

In daily application, if the water temperature of the solar water heater is difficult to meet the application requirement in rainy days or cold winter, the electric heating function can be started to carry out electric heating and temperature increasing. In the process of heating by electric heating, the controller collects a detection signal of the flow sensor 60, and obtains a water outlet flow value of hot water in the water storage tank based on the detection signal of the flow sensor 60, when the water outlet flow value is non-zero value, namely when a user uses water, the controller operates the electric heater 90 to temporarily stop heating until the water outlet flow value is zero value, namely when the user does not use water, the electric heater 90 is restarted to continue heating until the water temperature reaches a target temperature, the target temperature can be a first preset value, and the heating is stopped when power is cut off. Due to the control mode, the situation that a user uses water and heats the water at the same time is avoided, the ratio of cold water to hot water needs to be adjusted ceaselessly as the water temperature is higher, and inconvenience is brought.

As shown in fig. 4, the heat sink 40 is at least composed of a heat pipe 41. The radiating pipe 41 extends from top to bottom along the spiral line direction, the axis of the spiral line of the radiating pipe 41 is vertically arranged, the lower end of the radiating pipe 41 is an input port of the working medium, and the upper end of the radiating pipe is an output port of the working medium. The operation medium having a higher temperature in the heat collecting plate 10 flows in from the input port of the radiating pipe 41 located at the lower end, the operation medium flows along the radiating pipe 41 from the lower to the upper, the radiating pipe 41 exchanges heat with the external air, the temperature of the operation medium is lowered to form the operation medium having a lower temperature, and the operation medium flows out from the output port of the radiating pipe 41 located at the upper end and flows back into the heat collecting plate 10 through the circulation pump 30. The air at the position of the radiator 40 is heated by heat exchange, the density of the air in the area is reduced, the hot air with lower density floats upwards under the action of gravity, and the cold air with high peripheral density flows downwards to form a natural convection flow field, so that the radiating efficiency of the radiator is improved. The inventor finds through experimental research that when the radiating pipe 41 of the radiator 40 is vertically arranged, the working medium with higher temperature flows in from the lower end and flows out from the upper end, the intensity of natural convection is the largest, the radiating effect of the radiator is the best, and the operating time of the circulating pump 30 is shorter and the energy consumption is saved when the working medium generates the same temperature reduction amplitude; meanwhile, when the heat sink 40 has the same heat dissipation power, the volume of the heat sink 40 can be made smaller, which is beneficial to saving materials and reducing cost. The material of the heat dissipation tube 41 may be selected from copper.

Further, there is an improved solution for the heat dissipation pipe 41 of the heat sink 40. As shown in fig. 4, the spiral radius of the heat dissipation pipe 41 decreases from top to bottom, that is, the spiral radius at the upper part is large, the spiral radius at the lower part is small, the heat dissipation pipe 41 is formed into an inverted round table shape, and the heat dissipation pipe 41 is located on the side surface of the round table. The operation medium having a higher temperature flows into the input port of the lower end of the radiator 40, flows along the radiating pipe 41 from the lower side to the upper side, exchanges heat with the ambient air through the radiating pipe 41 to release energy, decreases in temperature, finally flows out of the output port of the upper end of the radiator 40, and flows back into the interior of the heat collecting plate 10 through the circulation pump 30. Therefore, the spiral radius of the radiating pipe 41 at the lowest end of the radiator 40 is the smallest, the formed natural convection driving force is stronger, a natural convection flow field can be quickly formed, and the radiating efficiency is improved; when the working medium reaches the same temperature drop amplitude, the operation time of the circulating pump 30 is favorably shortened, and the energy consumption is saved.

Further, there is an optional modification to the heat sink 40 described above. The heat sink 40, as shown in fig. 4 and 5, includes a plurality of guiding fins 42 in a thin sheet shape, and the guiding fins 42 are optionally defined in a right-angled ladder shape in this example. The plurality of the drainage fins 42 are vertically arranged and uniformly distributed in a radial shape around the circumference where the axis of the radiating pipe 41 is located, which can be understood as that the drainage fins 42 are uniformly distributed in a radial direction along the spiral radius of the radiating pipe 41, as shown in fig. 5. The oblique waist edge of the diversion sheet 42 in the shape of a slope is positioned at the axis side of the radiating pipe 41, the oblique waist edge forms an accommodating space in the shape of an inverted cone (or a table), the vertical waist edge of the diversion sheet 42 in the shape of a right angle is positioned at the outer side of the radiating pipe 41, and the vertical waist edge is positioned on the cylindrical surface; the upper top edge of the guide plate 42 constitutes the top end surface of the heat sink 40, and the lower bottom edge of the guide plate 42 constitutes the bottom end surface of the heat sink 40. The heat dissipation pipe 41 penetrates the drainage plate 42, and the heat dissipation pipe 41 is in full thermal contact with and fixed to the drainage plate 42. Optionally, the heat dissipation tube 41 and the flow guiding plate 42 are made of pure copper. The diversion sheet 42 conducts diversion on convection air formed in the area of the radiator 40, so that the air entering the area can only flow upwards along the diversion sheet 42, the convection air is prevented from flowing along the circumferential direction to generate turbulence to consume kinetic energy, the convection air is favorable for keeping stronger convection strength, and the radiator has higher heat dissipation efficiency; on the other hand, the flow guiding plate 42 is also beneficial to improving the heat dissipation efficiency of the heat sink 40, rapidly reducing the temperature of the working medium, and reducing the operation time of the circulating pump 30. Under the condition of the same heat dissipation power, the volume of the heat sink 40 can be reduced, and the manufacturing cost can be reduced.

Further, there is still a further improved solution for the heat sink 40. The heat sink 40 further comprises a flow guiding screen 43. As shown in fig. 4, 6, and 7, the baffle 43 may be formed by a side wall and may have an inverted conical surface shape or a circular truncated cone shape. As shown in fig. 7, a flange 431 extending from the top end portion to the inside is provided at the top end of the baffle 43, and the flange 431 is circumferentially formed in a plate-like annular shape. The annular flange 431 is fitted to the tip end surface formed by the flow guide plate 42 of the heat sink 40. The flow guide screen 43 is matched with the accommodating space, and the accommodating space surrounded by the inner side edge of the flow guide sheet 42 positioned on the axis side of the heat radiation pipe can accommodate the flow guide screen 43. The flow guide screen 43 extends into the accommodating space and is assembled with the drainage sheet 42, and the outward flange 431 covers the top end face of the drainage sheet 42. The diversion screen 43 restricts the flow direction of the convection air, as shown in fig. 6, the convection air flows from bottom to top, and the convection air flows outwards from the axis of the radiator 40 gradually towards the direction of transporting away from the axis, so that the heat dissipation pipe 41 at the top is in full contact with the convection air, the heat dissipation efficiency is improved, the temperature of the working medium is promoted to fall rapidly, the running time of the circulating pump 30 is reduced, and the energy consumption is saved. In addition, more importantly, the turbulent flow in the accommodating space can be avoided, and the heat dissipation effect is reduced. Under the condition of the same heat dissipation power, the heat sink 40 is also beneficial to reducing the volume and reducing the manufacturing cost.

Further, there is still another improved technical solution for the heat sink 40. The heat sink 40 also includes a spacer cylinder 44. As shown in fig. 6, the insulating cylinder 44 has a cylindrical structure with both ends open and formed by a side wall. The isolation cylinder 44 is matched with the vertical waist edge of the drainage sheet 42, the isolation cylinder 44 is sleeved on the outer side edge of the drainage sheet 42, the upper end of the isolation cylinder 44 is lower than the upper end part of the drainage sheet, convection air can flow out from the top of the radiator 40 conveniently, the resistance is small, the kinetic energy loss is small, and high heat dissipation efficiency is kept. The outer side of the drainage sheet 42 is provided with a separation cylinder 44, and the inner side of the separation cylinder 44 is attached to the outer side of the drainage sheet 42 or arranged away from the outer side. The adoption of the isolation cylinder 44 ensures that cold air with lower external temperature can only flow in from the lower end part of the radiator, and flows out from the upper end part, thereby avoiding the cold air from flowing in from the side part of the radiator 40, being beneficial to further improving the convection strength of the radiator 40, ensuring that the heat dissipation efficiency of the radiator is higher, ensuring that the working medium can be rapidly cooled, further reducing the running time of the circulating pump 30 and saving the energy consumption.

The radiating pipes of the radiator are vertically arranged, the lower ends of the radiating pipes are used as input ports, the upper ends of the radiating pipes are used as output ports, the spiral radiuses of the radiating pipes are sequentially reduced from top to bottom, a plurality of vertically arranged flow guide plates are radially and uniformly distributed around the axis of the radiating pipes, a flow guide screen in an inverted conical surface shape is arranged in a space defined by the flow guide plates, and an isolation cylinder is sleeved on the outer side edges of the flow guide plates, so that the convection strength of air in the area where the radiator is located can be improved, the radiating efficiency of the radiator can be improved by more than 18%; the running time of the circulating pump is reduced, the energy consumption is saved, and the heat dissipation energy consumption of the circulating pump can be saved by more than 22%; the radiator can be miniaturized, and the manufacturing cost is saved.

The present invention is also another embodiment, in which the technical contents different from the above-described embodiment are mainly described, wherein the technical features identical to those of the above-described solar water heater are not described again.

The intelligent solar water heater introduces the concept of a preset temperature range in the control process of the water temperature in order to prevent the generation of scale, and when the water temperature of the water storage tank is in the temperature range, the heat collection plate is controlled to rotate, so that the illumination power of the heat collection plate is reduced, the rising rate of the water temperature of the water storage tank is reduced, for example, the rising rate is reduced to 20% of the original rising rate, and other values can be selected according to requirements. For example, the lower limit and the upper limit of the temperature range may be 55 and 65 ℃. The controller acquires the water temperature of the water storage tank based on the first temperature sensor, when the water temperature of the water storage tank is lower than the lower limit value of a preset temperature range, such as lower than 55 ℃, the controller acquires the illumination power of the heat collection plate 10 based on the light intensity sensor 100, operates the driving motor 201 to rotate, adjusts the included angle between the heat collection plate and the sunlight line, and increases the illumination power of the heat collection plate until the illumination power value of the heat collection plate fed back by the light intensity sensor 100 reaches the maximum value, generally, when the included angle between the heat collection plate and the sunlight line is zero, such as the light ray is perpendicular to the heat collection plate, the illumination power of the heat collection plate is the maximum, so that the water in the water storage tank is rapidly heated, particularly in winter, the water in the water storage tank is rapidly heated, the maximum water temperature of the water storage tank is increased, and the water. When the water temperature of the water storage tank reaches the lower limit value of the preset temperature range, for example, when the water temperature of the water storage tank is higher than 55 ℃, the controller acquires the illumination power of the heat collecting plate 10 based on the light intensity sensor 100, operates the driving motor to rotate, and adjusts the included angle between the heat collecting plate and the sunlight to reduce the illumination power of the heat collecting plate until the illumination power value fed back by the light intensity sensor is reduced to the preset illumination power value, and the preset illumination power value can be understood as a specifically set power value and also can be understood as a specified illumination power ratio, for example, the ratio of the illumination power value fed back by the light intensity sensor to the illumination power when the water temperature of the water storage tank reaches the lower limit value of the preset temperature range can be taken as 10%. Other values can be taken based on the season, for example, a smaller ratio can be taken in summer and a larger ratio can be taken in winter, so that the water in the water storage tank is slowly heated, the water temperature is slowly increased, and the water temperature is suitable for use. When the water temperature of the water storage tank reaches the upper limit value of the preset temperature range, if the water temperature reaches 65 ℃, the controller operates the first electromagnetic valve to block the heating pipeline, operates the driving motor to rotate, adjusts the illumination power of the heat collection plate until the illumination power value fed back by the light intensity sensor is the minimum value, namely the sunlight is parallel to the light receiving surface of the heat collection plate, a 90-degree angle can be formed between the sunlight and the light receiving surface, and simultaneously operates the heating pipeline to block circulation to prevent the water temperature in the water storage tank from rising so as to keep the water temperature at the upper limit value of the preset temperature range, thereby avoiding scale generation on the inner wall of the water storage tank and the heat exchanger; when the water temperature of the water storage tank is reduced to the upper limit value of the preset temperature range, the heating pipeline is operated again for circulation, and the working medium flows through the heat exchanger to heat the water in the water storage tank until the water temperature reaches the upper limit value of the temperature range. When the heating pipeline is blocked to circulate, if the temperature of the working medium reaches the second preset value, the second electromagnetic valve is operated to act to enable the heat dissipation pipeline to circulate, so that the working medium is cooled, and if the temperature of the working medium can be reduced to the third preset value, the third preset value is smaller than the second preset value, so that the starting times and the running time of the circulating pump can be reduced, and the electric energy is saved.

The present invention has another embodiment in which the technical contents different from those of the first embodiment described above are mainly described.

An intelligent control system for a solar water heater including a heat collecting plate 10 with a built-in working medium, a water storage tank 20, and a heat exchanger 21 disposed in the water storage tank for heating water in a heat exchange manner, the intelligent control system comprising: the solar water heater comprises a radiator 40 for radiating working medium, a circulating pump 30 for driving the working medium to flow, a first electromagnetic valve 71, a second electromagnetic valve 72, a first temperature sensor 51 for detecting the water temperature of a water storage tank, a second temperature sensor 52 for detecting the temperature of the working medium in a heat collection plate, a driving device for driving the heat collection plate to rotate, a light intensity sensor 100 for detecting the illumination power of the heat collection plate and a controller suitable for controlling the solar water heater, wherein the first electromagnetic valve 71 is arranged in a heating pipeline at least formed by communicating the heat collection plate, a heat exchanger and the circulating pump through pipelines and is suitable for controlling the circulation of the heating pipeline and the switching of the blocking state; the second electromagnetic valve 72 is disposed in a heat radiation pipeline formed by communicating at least a heat collecting plate, a radiator and a circulation pump through a pipe, and is adapted to control the switching of the circulation and blocking states of the heat radiation pipeline. In the control of the water temperature to avoid the generation of scale, a concept of a preset temperature range is introduced, for example, the lower limit value of the temperature range is 55, and the upper limit value thereof is 65. When the water temperature is in the temperature range, the heat collecting plate is operated to reduce the illumination power so as to reduce the high rate of the water temperature of the water storage tank and slowly heat the water in the water storage tank. The controller obtains the water temperature of the water storage tank 20 based on the first temperature sensor 51, when the water temperature of the water storage tank 20 is lower than the lower limit value of the preset temperature range, the controller obtains the illumination power of the heat collecting plate 10 based on the light intensity sensor 100, operates the driving device to operate, adjusts the included angle between the heat collecting plate 10 and the sunlight line until the illumination power value of the heat collecting plate 10 fed back by the light intensity sensor 100 is maximum, when the water temperature of the water storage tank reaches the lower limit value of the preset temperature range, namely the water temperature is in the temperature range, the controller operates the driving device to operate to reduce the illumination power of the heat collecting plate until the illumination power value fed back by the light intensity sensor 100 is reduced to the preset illumination power value, the water temperature of the water storage tank slowly rises, when the water temperature reaches the upper limit value of the preset temperature range, the controller operates the first electromagnetic, operating the driving device until the value of the illumination power fed back by the light intensity sensor 100 is the minimum value; when the water temperature of the water storage tank is reduced to the upper limit value of the preset temperature range, the heating pipeline is operated again to circulate, and the working medium flows through the heat exchanger to heat the water in the water storage tank. And when the temperature of the working medium is higher than a second preset value, the second electromagnetic valve is operated to enable the heat dissipation pipeline to circulate, the working medium flows through the radiator to be cooled until the temperature of the working medium is reduced to a third preset value, and the third preset value is smaller than the second preset value. The second preset value can be understood as the highest temperature allowed by the working medium when the heat collecting plate is normally operated, or as other higher temperature values set below the highest temperature.

The preset illumination power value can be understood as a specifically set power value, and can also be understood as a specified illumination power ratio, for example, the ratio of the illumination power value fed back by the light intensity sensor to the illumination power when the water temperature of the water storage tank reaches the lower limit value of the preset temperature range, and different values can be obtained based on different seasons.

The driving device can be any one of a driving motor, a lead screw mechanism, a cylinder device and an oil cylinder device, and is a driving device in the prior art, and is not described one by one here. The heat collecting panel 10 is movably connected, e.g. hinged, pivotally connected, to a carrier frame of the heat collecting panel such that the heat collecting panel 10 is rotatable with respect to the carrier frame. The driving means is for driving the heat collecting panel 10 to rotate with respect to the carrier frame to adjust the light receiving power of the heat collecting panel 10.

Furthermore, the intelligent control system further comprises an electromagnetic proportional valve arranged in a water inlet pipeline of the water storage tank 20, a water inlet flow sensor for detecting water inlet flow, a water inlet temperature sensor for detecting water inlet temperature, a liquid level sensor 80 for detecting liquid level of the water storage tank, a water outlet flow sensor arranged in a hot water output pipeline of the water storage tank for detecting water flow, and an electric heater 90 arranged in the water storage tank 20 for heating water. The controller respectively acquires a liquid level value and a water outlet flow value of the water storage tank 20 based on the liquid level sensor 80 and the water outlet flow sensor, when the water outlet flow value is a non-zero value and the liquid level value is too low, such as being smaller than a critical low water level value, the controller respectively acquires the temperature of the supplemented cold water and the water temperature of the water storage tank based on the water inlet temperature sensor and the first temperature sensor 51, controls the electric heater 90 to start heating and controls the opening of an electromagnetic proportional valve regulating valve, calculates the accumulated water supplement amount in unit time based on the flow value fed back by the water inlet flow sensor, enables the heat required by the temperature of the accumulated water supplement amount cold water to rise to the water temperature of the water storage tank to be equal to the heat generated by the electric heater in the unit time, and enables the water temperature of the outlet water to be constant until the. When the water outlet flow value is zero, the controller controls the valve opening of the electromagnetic proportional valve to be adjusted to the maximum, such as 100% valve opening, so as to rapidly supplement water. The unit time may be any small period of time and is a small period of time that is resolvable by the controller. The valve opening degree of the electromagnetic proportional valve is determined by formulas P ^ L ^ C ^ (T2-T1) and delta ψ ^ L, wherein P is the heating power of the electric heater, delta ψ is the valve opening degree of the electromagnetic proportional valve, L is the flow rate of cold water, C is the specific heat of water, T1 is the temperature of the supplemented cold water, and T2 is the water temperature of the water storage tank.

The structural configuration of the heat sink is the same as that in the first embodiment, and will not be described.

It should be noted that the above-mentioned heat collecting plate, water storage tank, speed reducer, and light intensity sensor are all the prior art, and detailed descriptions of the specific structure, connection relationship, and operation principle thereof will not be provided herein; the hardware configuration of the controller is also the prior art, and can be composed of any one of devices with a data processing function, such as a single chip microcomputer, an FPGA, and a PLC, and the configuration of the controller is not described in detail.

In the prior art, scales are easy to form on the inner wall of the water storage tank and the heat exchanger of the solar water heater, and the more scales are accumulated, the smaller and smaller volume of the solar water storage tank, the lower heat exchange efficiency, the blockage of the water outlet, the damage of a valve and a shower nozzle, and even the damage of a heat collection plate and even the explosion of the heat collection plate are caused by the overhigh temperature of a working medium.

Compared with the prior art, the invention achieves the following technical effects:

according to the solar water heater, the controller obtains the water temperature of the water storage tank, when the water temperature of the water storage tank reaches a first preset value, if the water temperature of the water storage tank reaches 65 ℃, the controller operates the driving motor to rotate, adjusts the included angle between the heat collecting plate and the sunlight, reduces the illumination power of the heat collecting plate, enables the illumination power of the heat collecting plate to be minimum, prevents the water temperature in the water storage tank from rising, enables the water temperature to be kept at the first preset value, effectively avoids scale accumulation on the water storage tank and the heat exchanger, enables the heat exchanger to keep high heat exchange efficiency, and avoids the situation that the volume of the water storage tank is reduced and the water outlet is blocked due to the scale accumulation, and the working medium temperature is higher than the safe.

A heat dissipation pipeline is connected beside a heating pipeline of the solar water heater, and a radiator is connected on the heat dissipation pipeline and is suitable for radiating heat of a working medium. In the process of heating water in the water storage tank in a heat exchange mode in a stopping/suspending mode, if the temperature of the working medium of the heat collection plate is higher than the allowed maximum temperature, the working medium can be operated to flow through the radiating pipeline, and the working medium flows through the radiator to radiate heat and reduce the temperature, so that the temperature of the working medium is in a safe temperature range. So as to avoid the damage and even the explosion of the heat collecting plate caused by the overhigh temperature of the working medium.

The cooling tube of radiator is upright arranging, the lower extreme of cooling tube is as the input port, the upper end is as the delivery outlet, the spiral radius of cooling tube reduces from last to bottom in proper order, a plurality of drainage pieces of upright arranging are radial evenly distributed around the axis of cooling tube, set up the diversion screen that is handstand circular conical surface form in the space that the drainage piece encloses, an outside limit suit isolation cylinder at the drainage piece, all be favorable to improving the convection strength of the regional air in radiator place, the radiating efficiency of radiator is improved, reduce the operating time of circulating pump, the energy saving, can also make the radiator miniaturized, and the manufacturing cost is saved.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the foregoing description only for the purpose of illustrating the principles of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims, specification, and equivalents thereof.

Claims (6)

1. The utility model provides a collection thermal-arrest board illumination power adjustable does not have dirty intelligent solar water heater which characterized in that: the solar water heater comprises a controller for controlling the solar water heater, a heat collecting plate with a built-in working medium, a water storage tank with a heat preservation function, a fixing frame for bearing the heat collecting plate, a driving motor, a circulating pump for driving the working medium to flow and a radiator for radiating the working medium; the heat collecting plate is connected with the fixing frame shaft through a rotating shaft, the heat collecting plate is fixed with the rotating shaft, and the driving motor is connected with the rotating shaft and is suitable for driving the heat collecting plate to rotate around the rotating shaft so as to adjust the illumination power of the heat collecting plate; the water storage tank is provided with a first temperature sensor for detecting the water temperature of the water storage tank, and a heat exchanger and an electric heater for heating water are arranged in the water storage tank; the heat collecting plate is provided with a light intensity sensor for detecting the solar illumination power received by the heat collecting plate; the output port of the heat collecting plate, the heat exchanger, the circulating pump and the input port of the heat collecting plate are communicated through pipelines to form a heating pipeline, the heating pipeline is suitable for circulating and transporting heat energy of a working medium and heating water in the water storage tank through heat exchange of the heat exchanger, and a first electromagnetic valve for controlling circulation and blocking state switching of the heating pipeline is assembled on the heating pipeline; the output port of the heat collecting plate, the radiator, the circulating pump and the input port of the heat collecting plate are communicated through a pipeline to form a heat radiating pipeline, the heat radiating pipeline is suitable for circulating and transporting heat energy of a working medium and radiating and cooling through the radiator, and a second electromagnetic valve for controlling the circulation and blocking state switching of the heat radiating pipeline is assembled on the heat radiating pipeline; the controller acquires the water temperature of the water storage tank based on the first temperature sensor, when the water temperature of the water storage tank reaches a first preset value, the controller acquires the illumination power of the heat collection plate based on the light intensity sensor, operates the driving motor to rotate, and adjusts the included angle between the heat collection plate and the sunlight line to reduce the illumination power of the heat collection plate until the illumination power value fed back by the light intensity sensor is the minimum, so that the water temperature in the water storage tank is prevented from rising, and scale deposition on the inner wall of the water storage tank and the heat exchanger is prevented; the heat radiator at least comprises a heat radiating pipe, the heat radiating pipe extends from top to bottom along the spiral line direction, the axis of the spiral line is vertically arranged, the spiral radius is sequentially reduced from top to bottom, the heat radiating pipe is in an inverted round table shape, the lower end of the heat radiating pipe is an input port of a working medium, and the upper end of the heat radiating pipe is an output port of the working medium; the radiator also comprises a flow guide sheet for enhancing the convection effect, the flow guide sheet is vertically arranged and radially distributed around the axis of the radiating pipe, the flow guide sheet is penetrated through by the radiating pipe, and the flow guide sheet is attached and fixed with the radiating pipe; the radiator also comprises a flow guide screen which is formed by side walls and is in an inverted conical surface shape, an outward flange which is matched with the top end surface of the flow guide sheet and extends outwards from the top end is arranged at the top end of the flow guide screen, an accommodating space for accommodating the flow guide screen is formed by enclosing the inner side edge of the flow guide sheet, which is positioned on the axis side of the heat radiation pipe, the flow guide screen extends into the accommodating space and is assembled with the flow guide sheet, and the outward flange covers the top end surface of the flow guide sheet; the outer side edge of the drainage sheet of the radiator is provided with a cylindrical isolation cylinder, the outer side edge of the drainage sheet is attached to the inner side wall of the isolation cylinder, and the upper end of the isolation cylinder is lower than the upper end part of the drainage sheet.

2. The intelligent solar water heater with the heat collecting plate capable of adjusting the illumination power as claimed in claim 1, wherein: the driving motor is connected with the rotating shaft in a mode of connecting any one of the driving motor with the rotating shaft through a speed reducer, the driving motor with the rotating shaft through a gear mechanism, an output shaft of the driving motor and the rotating shaft.

3. The intelligent solar water heater with the adjustable illumination power of the heat collecting plate as claimed in claim 2, wherein: when the water temperature of the water storage tank rises to the first preset value, the controller can also operate the first electromagnetic valve to block the circulation of the heating pipeline and operate the second electromagnetic valve to enable the circulation of the heat dissipation pipeline, the working medium with higher temperature in the heat collection plate flows through the radiator to dissipate heat to form working medium with lower temperature, and the working medium flows back into the heat collection plate through the heat dissipation pipeline to prevent the water temperature in the water storage tank from rising and prevent scale deposit on the inner wall of the water storage tank and the heat exchanger.

4. The intelligent solar water heater with the adjustable illumination power of the heat collecting plate as claimed in claim 3, wherein: the controller acquires the temperature of the working medium based on the second temperature sensor; when the temperature of the water in the water storage tank reaches a first preset value, the controller controls the circulating pump to stop running, when the temperature of the working medium is higher than a second preset value, the controller controls the second electromagnetic valve to act to enable the heat dissipation pipeline to circulate, the circulating pump is controlled to start, the working medium flows through the radiator to cool until the temperature of the working medium is reduced to a third preset value, and the second preset value is larger than the first preset value.

5. The intelligent solar water heater with the heat collecting plate capable of adjusting the illumination power as claimed in claim 1, wherein: the heat collecting plate is provided with a second temperature sensor for detecting the temperature of the working medium; the controller acquires the water temperature of the water storage tank based on the first temperature sensor and the temperature of the working medium based on the second temperature sensor, when the difference between the temperature of the working medium and the water temperature of the water storage tank reaches a first heat exchange threshold value, the controller operates the first electromagnetic valve to act to enable the heating pipeline to circulate, operates the circulating pump to start, heats the water in the water storage tank by the working medium flowing through the heat exchanger, and operates the circulating pump to stop until the difference between the temperature of the working medium and the water temperature of the water storage tank reaches a second heat exchange threshold value, wherein the first heat exchange threshold value is larger than the second heat exchange threshold value; when the difference between the temperature of the working medium and the water temperature of the water storage tank reaches a first heat exchange threshold value and the water temperature of the water storage tank reaches a first preset value, the controller operates the second electromagnetic valve to act to enable the heat dissipation pipeline to circulate, operates the circulating pump to start, and enables the working medium to flow through the heat radiator to dissipate heat and cool until the difference between the temperature of the working medium and the water temperature of the water storage tank reaches a second heat exchange threshold value.

6. The intelligent solar water heater with the heat collecting plate capable of adjusting the illumination power as claimed in claim 5, wherein: a flow sensor is arranged in a hot water output pipeline of the water storage tank and is suitable for judging whether a user uses water or not; in the process of heating water by circulating the heating pipeline, when the controller acquires that the water outlet flow value of the water storage tank is a non-zero value based on the flow sensor, the controller controls the heating pipeline to block, stops heating the water, and controls the heating pipeline to circulate to continue heating the water until the water outlet flow value is a zero value; in the process of suspending heating of the water, if the temperature of the working medium is higher than a second preset value, the controller controls the heat dissipation pipeline to circulate, and the working medium flows through the radiator to be cooled until the temperature of the working medium is lower than the second preset value.

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