CN214536882U

CN214536882U - Solar water heater capable of automatically cleaning and preventing freezing

Info

Publication number: CN214536882U
Application number: CN202120149180.5U
Authority: CN
Inventors: 曹先珍
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2021-10-29
Anticipated expiration: 2031-01-21

Abstract

The utility model relates to a solar facilities technical field, concretely relates to but self-cleaning reaches frost-proof solar water heater, include storage water tank, thermal-collecting tube, clean mechanism and prevent frostbite the subassembly. The cleaning mechanism includes: the internal circulation pipeline comprises a water feeding pipe and a water discharging pipe, wherein a water return pipe is arranged between the water feeding pipe and the water discharging pipe, and a cleaning agent feeding port and a water pump are arranged on the water return pipe. And the water storage tank cleaning component is arranged at the bottom of the water storage tank and is connected with the internal circulation pipeline. And one end of the heat collecting pipe cleaning component is arranged in the water storage tank and connected with the internal circulation pipeline, and the other end of the heat collecting pipe cleaning component is arranged in the heat collecting pipe. The solar water heater can automatically clean water scales in the water tank and the heat collecting pipe, and avoids the trouble of disassembly and cleaning. In addition, the inner circulation pipeline and the anti-freezing component are arranged, so that the water feeding pipe, the water discharging pipe and the heat collecting pipe can be prevented from freezing in cold weather, and inconvenience in water use and economic loss caused by low temperature in weather are avoided.

Description

Solar water heater capable of automatically cleaning and preventing freezing

Technical Field

The utility model relates to a solar facilities technical field, concretely relates to but self-cleaning and frost-proof solar water heater.

Background

The solar water heater converts solar energy into heat energy, heats water from low temperature to high temperature, and meets the requirement of hot water in life and production. The water in the solar water heater is continuously heated, so that the concentration of calcium and magnesium salts in the water is increased, when the concentration of the calcium and magnesium salts exceeds the concentration of the calcium and magnesium salts, precipitates are separated out from the water to form precipitates, bicarbonate is heated and decomposed to generate insoluble precipitates, in addition, the solubility of certain salts is gradually reduced along with the increase of the temperature, the precipitates are separated out, and finally, impurities in tap water and dirt formed after microorganisms generated by the long-term use of the water heater die. The sediment, impurities and dirt are adhered to the wall of the water tank and the wall of the heat collecting pipe, and water scale is formed.

At present, the method for cleaning the water scale of the water tank and the heat collecting pipe is that a person climbs onto a roof, the water scale of the water tank and the heat collecting pipe can be thoroughly cleaned only by field disassembly, time and labor are wasted, and the safety of an operator cannot be guaranteed. In addition, the water supply pipe and the water discharge pipe are often frozen in winter, inconvenience is brought to water consumption, and the bottom of the heat collecting pipe is frozen in extreme weather or when the heat collecting pipe is not frequently used, so that the heat collecting pipe is frozen. The solar water heater which can automatically clean water scales in a water tank and a heat collecting pipe and well prevent freezing in winter is needed.

Disclosure of Invention

For solving the not enough of prior art existence, the embodiment of the utility model provides a but self-cleaning and frost-proof solar water heater.

The embodiment of the utility model provides a technical scheme does:

the embodiment of the utility model provides a but self-cleaning and frost-proof solar water heater, including storage water tank, thermal-collecting tube and clean mechanism.

The cleaning mechanism includes:

the internal circulation pipeline comprises a water feeding pipe and a water discharging pipe, wherein a water return pipe is arranged between the water feeding pipe and the water discharging pipe, and a cleaning agent feeding port and a water pump are arranged on the water return pipe.

And the water storage tank cleaning component is arranged at the bottom of the water storage tank and is connected with the internal circulation pipeline.

And one end of the heat collecting pipe cleaning component is arranged in the water storage tank and connected with the internal circulation pipeline, and the other end of the heat collecting pipe cleaning component is arranged in the heat collecting pipe.

Further, the storage tank cleaning assembly comprises:

the backup pad, with storage water tank fixed connection, bi-pass mouth of a river knot is fixed in the backup pad.

The top of the double water-passing port knot is parallel to or slightly lower than the inner wall of the water storage tank, and the lower part of the double water-passing port knot is connected with the water feeding pipe.

The rubber film is arranged into a funnel type structure and fixed in the double-channel water gap junction, and a pressing sheet for fixing the rubber film is arranged on the upper portion of the rubber film.

The preforming sets up in bi-pass mouth of a river knot, and the structure sets up to the centre for the ring piece of through-hole.

The support, the support top is connected with the return bend, the support bottom with the backup pad is connected.

The elbow is arranged in the water storage tank, the diameter of the bottom of the elbow is larger than that of the top of the elbow, and the height difference exists between the top of the elbow and the top of the double-water-opening joint; the height difference of the bottom of the elbow and the top of the double water gap knot is smaller than the height of the rubber membrane.

The sewer pipe connecting device is arranged in the water storage tank and connected with the sewer pipe, the sewer pipe connecting device is an L-shaped tee pipeline integrally and comprises an upper first port, a lower second port and a side third port, a first one-way valve is arranged on one side of the third port of the sewer pipe connecting device, a stand column is arranged on the pipeline wall on one side of the third port, a first floating plug capable of moving along with water is connected to the stand column, and the first floating plug is just positioned at the third port when no water exists, so that the blocking effect is achieved.

Further, the included angle range of the elbow and the inner wall of the longer side of the water storage tank is set to be 30-60 degrees. The water sprayed in the included angle range can effectively generate vortex flow.

Furthermore, the elbow is a telescopic multi-section elbow, and two ends of the elbow are connected with a spring plate. The elastic sheet plays a role in springing open the multi-section bent pipe and orienting the multi-section bent pipe.

Furthermore, the elbow is of a structure with the diameter of the bottom larger than that of the top and the diameter of the middle larger than that of the bottom.

Further, the water storage tank comprises an inner wall of the water storage tank, a heat insulation layer and an outer wall of the water storage tank, and an exhaust port is arranged above the water storage tank; a heater mounting opening, a magnesium rod mounting opening, a water temperature sensor mounting opening and a water level sensor mounting opening are formed in the side face of the water storage tank; the bottom of the inner wall of the water storage tank protrudes downwards, an opening is formed in the protruding part, and the water storage tank cleaning assembly penetrates through the opening to be connected with the water storage tank.

Further, the heat collecting pipe cleaning assembly comprises:

the adapter is arranged in the water storage tank, one end of the adapter is connected with the sewer pipe connecting device, and the other end of the adapter is connected with the first flow guide pipe.

The first guide pipe is arranged inside the water storage tank, one end of the first guide pipe is connected with the adapter, and the other end of the first guide pipe is connected with the second guide pipe.

The second flow guide pipe comprises a main pipe and a plurality of branch pipe joints; the main pipe is arranged on the inner wall of the water storage tank, and the branch pipe joint is connected with the third flow guide pipe and inserted into the heat collecting pipe.

The third honeycomb duct sets up the inside of thermal-collecting tube, third honeycomb duct bottom shape becomes the curved shape of colluding, the curved horn mouth that colludes the shape opening part and set to, the horn mouth top is provided with the second that can remove along with water and floats the stopper, and when anhydrous the second floats the stopper and just in time is located horn mouth department plays the jam effect.

And a support pad is arranged outside the third flow guide pipe and used for supporting the third flow guide pipe in the heat collecting pipe.

Further, still including the subassembly of preventing frostbite, the subassembly of preventing frostbite includes second honeycomb duct, third honeycomb duct to and set up at the suction pump and the solenoid valve of second honeycomb duct one end, set up the thermal-collecting tube temperature sensor in third honeycomb duct bottom.

Further, the bottom of the internal circulation pipeline is provided with a dirt settling box, the dirt settling box is arranged to be a transparent box body, the top opening of the dirt settling box is communicated with the upper water pipe, a cleaning opening is formed in the middle of the dirt settling box and used for cleaning the dirt settling box, and the bottom of the dirt settling box is provided with a drain valve.

And the controller is electrically connected with the water pump, the heater, the water temperature sensor, the water level sensor, the drain valve and the automatic water feeding valve.

The embodiment of the utility model provides an advantageous effect who reaches does:

1. the embodiment of the utility model provides an adopted and set up the technical scheme of clean mechanism in solar water heater, under the prerequisite that need not dismantle the water heater, both can the incrustation scale of self-cleaning water tank, again can the inside incrustation scale of self-cleaning collecting tube, avoid dismantling abluent trouble, convenient operation, the artifical input cost of reduction has greatly prolonged life, more is favorable to the health of water.

2. The embodiment of the utility model adopts the internal circulation pipeline arranged in the solar water heater system, the water storage tank cleaning device and the heater are arranged in the water storage tank, the water pump provides power to fill hot water in the pipeline constantly or as required, the hot water circulation is carried out discontinuously every day to lead the water in the barrel to generate vortex flow, and the generation of scale can be effectively reduced; meanwhile, the upper water pipe and the lower water pipe are adjacently laid in parallel, so that an anti-freezing effect can be generated.

3. The embodiment of the utility model provides an adopted the heating of controller control heater, can make the temperature of water of inner loop become hot, reinforcing cleaning performance in the self-cleaning in-process. Under the action of the water storage tank cleaning device, water flow is enabled to continuously and directionally wash the inner wall of the water tank, and the cleaning effect is better. Meanwhile, the temperature sensor is additionally arranged at the water mixing valve, so that the water can be heated when needed through the controller, hot water is not required to appear after cold water is discharged, and water is saved.

4. The embodiment of the utility model provides a second honeycomb duct and the third honeycomb duct material of the clean subassembly of thermal-collecting tube adopt copper, because copper has fine heat conductivity, so can play preliminary frostproofing effect to the thermal-collecting tube. Under extreme conditions, through the technical scheme who sets up the subassembly that prevents frostbite for the suction pump sends the thermal-collecting tube terminal to hot water in the bucket, can prevent that the thermal-collecting tube from freezing and damaging.

5. The embodiment of the utility model provides a can accomplish directly, the water in evacuation storage water tank and the collecting tube completely through setting up inner loop pipeline and controller, can carry out the protection of preventing frostbite to solar water heater overall system well through this evacuation way when long-time unnecessary or extreme weather.

Drawings

Fig. 1 is a schematic view of an overall structure of a solar water heater according to an embodiment of the present invention.

Fig. 2 is a schematic view of a water storage tank according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a water storage tank cleaning assembly according to an embodiment of the present invention.

Fig. 4 is a schematic structural view of a water storage tank cleaning assembly according to another embodiment of the present invention.

Fig. 5 is a schematic structural view of a downcomer connecting device according to an embodiment of the present invention.

Fig. 6 is an exploded view of a heat collecting tube cleaning assembly according to an embodiment of the present invention.

Fig. 7 is an assembly view of the first flow guide tube, the second flow guide tube and the third flow guide tube according to an embodiment of the present invention.

Fig. 8 is a schematic view of a third embodiment of the present invention.

Fig. 9 is an assembly diagram of the first duct, the second duct, and the third duct with the antifreeze system added according to an embodiment of the present invention.

In the figure, 1, internal circulation pipeline: 101. a water feeding pipe; 102. a sewer pipe; 103. a water return pipe; 104. a water pump; 105. a water supply valve; 106. a dirt settling box; 107. a blowoff valve; 108. a second one-way valve; 109. a cleaning agent feeding port; 110. a water mixing valve; 111. a first manual valve; 112. a second manual valve; 2. a water storage tank; 201. the inner wall of the water storage tank; 202. a water storage tank housing; 203. a water storage tank heat insulation layer; 204. a temperature sensor mounting port; 205. a water level sensor mounting port; 206. a heater mounting port; 3. a water storage tank cleaning component; 301. a double water-through port junction; 302. a rubber film; 303. tabletting; 304. a support plate; 305. bending the pipe; 306. a support; 307. a sewer pipe connecting device; 3071. a first port; 3072. a second port; 3073. a third port; 308. a first floating plug; 309. a first check valve; 310. a column; 311. a seal ring; 312. a spring plate; 4. a heat collecting pipe cleaning device; 401. a crossover sub; 402. a first draft tube; 403. a second draft tube; 404. a third draft tube; 405. a support pad; 406. a second floating plug; 5. a controller; 6. a heat collecting pipe; 8. a water pump; 9. an electromagnetic valve; 10. a heat collecting pipe temperature sensor.

Detailed Description

To facilitate understanding of the present invention for those skilled in the art, embodiments of the present invention will be described below with reference to the accompanying drawings.

It should be noted that, the dual-way nozzle junction 301 in the embodiment of the present invention is a dual-way nozzle structure.

As shown in FIGS. 1-5, the embodiment of the utility model provides a but self-cleaning and frost-proof solar water heater, including storage water tank 2, thermal-collecting tube 6 and clean mechanism.

As shown in fig. 1, the cleaning mechanism includes:

the internal circulation pipeline 1 comprises an upper water pipe 101 and a lower water pipe 102, a water return pipe 103 is arranged between the upper water pipe 101 and the lower water pipe 102, and a cleaning agent feeding port 109 and a water pump 104 are arranged on the water return pipe 103. The upper water pipe 101 and the lower water pipe 102 are adjacently laid in parallel.

The water storage tank cleaning component 3 is arranged at the bottom of the water storage tank 2 and is connected with the internal circulation pipeline 1;

and one end of the heat collecting pipe 6 cleaning component is arranged in the water storage tank 2 and connected with the internal circulation pipeline 1, and the other end of the heat collecting pipe 6 cleaning component is arranged in the heat collecting pipe 6.

In the internal circulation pipeline 1, an upper water pipe 101 is connected to return pipe 103 one end, installs second check valve 108 on return pipe 103 earlier before connecting, and second check valve 108 effectively dissolves the pressure of water pressure to water pump 104, and the other end of return pipe 103 is connected between downcomer 102 and muddy water valve 110, is close muddy water valve 110, does benefit to and reduces the cold water volume. As shown in fig. 1, a check valve, a water pump 104 and a cleaning agent inlet 109 are connected to the water return pipe 103 in sequence from left to right. The cleaning agent introduction port 109 is provided between the water pump 104 and the water mixing valve 110, and a cleaning agent container filled with a cleaning agent is mounted on the cleaning agent introduction port 109 by screw connection, and the cleaning agent introduction port 109 is sealed with a screw plug when the cleaning function is not used.

The bottom of the internal circulation pipeline 1 is provided with a dirt settling box 106, the dirt settling box 106 is a transparent box body, the top of the box body is open, and the bottom of the box body is provided with a drain valve 107. The scale brought down slowly during the daily water circulation is settled in the dirt settling box 106, and the condition of the scale in the water tank can be judged through the deposition of the dirt settling box 106. When cleaning, the sewage is discharged from the sewage box 106 through the sewage valve 107.

The middle of the dirt settling box 106 is provided with a large-sized cleaning opening which can be accessed by hands and is used for cleaning the dirt settling box 106 and is closed by a cover at ordinary times. When the dirty box 106 needs to be cleaned, the first manual valve 111 at the upper end of the dirty box 106 is closed, and then the cover on the cleaning opening is opened for cleaning. In addition, the controller 5 can be used for controlling the closing of the blowdown valve 107 separately, so as to manually blowdown or drain the water in the solar water heater.

An internal circulation pipeline 1 is arranged in the solar water heater, a heater is arranged in the water storage tank 2, power is provided through a water pump 104, the hot water pipe is filled with hot water constantly or according to needs, hot water circulation is carried out discontinuously every day, water in the barrel flows, and scale can be effectively reduced.

As shown in fig. 2, the overall shape of the water storage tank 2 is cylindrical, and comprises a water tank inner wall, an insulating layer and a water tank outer wall, wherein an air vent is arranged above the water tank to exhaust air pressure generated by heating; the side surface of the water storage tank 2 is provided with a heater mounting hole 206, a magnesium rod mounting hole, a water temperature sensor mounting hole, a water level sensor mounting hole 205 and a water storage tank cleaning component 3 mounting hole. The middle part of the bottom of the water storage tank 2 is downwards convex, preferably 15 degrees, and a downwards threaded opening is arranged in the middle of the convex part, so that the sewer pipe 102 and the water storage tank cleaning component 3 can be conveniently installed and sealed. The middle part of the bottom of the water storage tank 2 is downwards convex, so that the scale is easy to deposit at the convex part, and the cleaning device can conveniently discharge the scale in the water storage tank 2.

The water pump 104 is used to power the internal circulation line 1.

The controller 5 is electrically connected with the water pump 104, the heater, the water temperature sensor, the water level sensor, the drain valve 107 and the automatic water supply valve 105.

As shown in fig. 3, the storage tank cleaning assembly 3 includes:

the supporting plate 304 is fixedly connected with the water storage tank 2, and the double water inlet joint 301 is fixed on the supporting plate 304.

The top of the double water inlet junction 301 is flush with the inner wall 201 of the water storage tank, and the lower part of the double water inlet junction is connected with the upper water pipe 101.

The rubber membrane 302 is arranged in a funnel type structure and fixed in the double water inlet junction 301, and a pressing sheet 303 for fixing the rubber membrane 302 is arranged at the upper part of the rubber membrane 302.

The pressing piece 303 is structurally arranged into a circular ring piece with a through hole in the middle.

A bracket 306, the top of the bracket 306 is connected with the elbow 305, and the bottom of the bracket 306 is connected with the supporting plate 304.

The elbow 305 is arranged inside the water storage tank 2, the diameter of the bottom of the elbow 305 is larger than that of the top of the elbow, and a height difference exists between the top of the elbow 305 and the top of the double water inlet junction 301; the height difference between the bottom of the elbow 305 and the top of the double water inlet joint 301 is smaller than the height of the rubber membrane 302.

The elbow 305 is configured to provide directional flow guidance, increase the impact of the water flow, and create a vortex in the water inside the tank 2 to clean the scale inside the tank 2 well. When the device is installed, the included angle between the elbow 305 and the inner wall of the longer side of the inner wall 201 of the water storage tank is set to be 30-60 degrees, and preferably 40 degrees.

Particularly, the support 306 is a circular ring with four legs welded uniformly on the lower part of the circular ring, and the bottom ends of the legs are fixedly connected with the support plate 304 through screws. The elbow 305 is welded to the ring.

The sewer pipe connecting device 307 is arranged inside the water storage tank 2 and connected with the sewer pipe 102, the sewer pipe connecting device 307 is an L-shaped three-way pipeline and comprises an upper first port 3071, a lower second port 3072 and a side third port 3073, a first check valve 309 is arranged on one side of the third port 3073 of the sewer pipe connecting device 307, a vertical column 310 is arranged on the pipeline wall on one side of the third port 3073, a first floating plug 308 capable of moving along with water is connected to the vertical column 310, and the first floating plug 308 just falls on the third port 3073 to play a role of blocking when no water exists.

The downcomer connecting device 307 is provided with a groove for mounting a sealing ring 311, and is mounted in cooperation with the adapter 401.

The bent pipe 305 is a telescopic multi-section bent pipe 305, the two ends of the multi-section bent pipe 305 are connected with the elastic sheets 312, one end of each elastic sheet 312 is arranged at the top end of the multi-section bent pipe 305, the other end of each elastic sheet 312 is arranged on the sewer pipe 102, and the top end of the multi-section bent pipe 305 is provided with a threading ring for the elastic sheets 312 to pass through. The spring 312 acts to limit the direction of the outlet of the multi-section elbow 305. The spring plate 312 is made of a material with high elasticity.

The diameter of the bottom of the multi-section elbow 305 is in fixed proportion to the diameter of the bottom end of the rubber membrane 302. The installation heights of the double water-passing opening junction 301 device and the flow guide bent nozzle device are determined according to the proportion. The size of the rubber membrane 302 is in fixed proportion to the size of the matched part of the double-water-opening joint 301 device, so that the rubber membrane 302 can be turned upwards by water flow during water feeding. For example, the rubber membrane (302) is 4 cm long, the top outer diameter is 2 cm, the bottom outer diameter is 5 cm, and the distance between the front end of the multi-section elbow pipe 305 and the double water gap junction 301 device is 3 cm; the outer diameter of the rubber membrane 302 is 3 cm, and then the inner diameter of the bottom of the multi-section directional flow guiding bent nozzle is 3.1 cm.

Specifically, when the controller 5 controls the water pump 104 to operate and water flows upwards from the sewer pipe 102, the rubber membrane 302 is turned upwards by the thrust of the water so that the water is guided into the upper multi-section elbow pipe 305; when water flows downwards from the water supply pipe 101 or the water does not flow, the rubber membrane 302 is pushed by the water or self gravity and turns downwards to enable the water or sediments to directly enter the pipeline from the periphery without obstacles to pass through.

In another embodiment, as shown in FIG. 4, elbow 305 may be configured with a bottom diameter greater than a top diameter and a middle diameter greater than a bottom diameter.

As shown in fig. 5 to 7, the heat collecting tube 6 cleaning assembly includes: the clean subassembly of thermal-collecting tube 6 includes:

and the adapter 401 is arranged inside the water storage tank 2, one end of the adapter 401 is connected with the sewer pipe connecting device 307, and the other end of the adapter 401 is connected with the first guide pipe 402. The adapter 401 is L-shaped, and has a convex groove protruding outwards at the connection end with the downcomer connection device 307, and the size of the convex groove matches with the groove on the downcomer connection device 307. The adapter 401 is made of a high temperature resistant and easily-shaped material.

The first guide pipe 402 is arranged inside the water storage tank 2, one end of the first guide pipe 402 is connected with the adapter 401, and the other end of the first guide pipe 402 is connected with the second guide pipe 403.

The second flow guide pipe 403 comprises a main pipe and a plurality of branch pipe joints; the main pipe is arranged on the inner wall 201 of the water storage tank, and the branch pipe joint is connected with the third flow guide pipe 404 and inserted into the heat collecting pipe 6.

Third honeycomb duct 404 sets up inside thermal-collecting tube 6, third honeycomb duct 404 bottom shape becomes the curved shape of colluding, the curved horn mouth that colludes the shape opening part and set to, the horn mouth top is provided with the second floating plug 406 that can remove along with water, and the second floating plug 406 just in time falls tail portion port department plays the jam effect when anhydrous.

The first flow conduit 402 is disposed at a higher level in the storage tank 2 than the second flow conduit 403 is disposed in the storage tank 2, thereby reducing air remaining in the conduits and facilitating siphon formation.

A support pad 405 is arranged outside the third flow guide pipe 404, and the support pad 405 is used for supporting the third flow guide pipe 404 in the heat collecting pipe 6. The support pad 405 structure is the ring piece, connects with four connecting rods, and the centre is the through-hole, third honeycomb duct 404 passes the through-hole.

The first flow guide pipe 402 is made of metal or plastic with good plasticity and shaped pipe wall and corrosion resistance. The second flow guide pipe 403 and the third flow guide pipe 404 are made of metal with good plasticity and good heat conductivity, preferably copper.

The first floating plug 308 and the second floating plug 406 are provided with a spherical structure, preferably a drop shape, and are made of rubber, preferably rubber, which is designed to be floated in water.

Specifically, the main pipe and the branch pipe joint may be detachable or integrated. The main pipe is arranged in the barrel through a plurality of groups of supporting frames and can move in a small range from front to back, left to right, up to down, and the bottom end of each supporting frame is welded on the inner wall of the water tank. The branch pipe joint is provided with an internal thread near the end of the heat collecting pipe 6, and the top end of the third flow guiding pipe 404 is provided with an external thread which are meshed and connected.

As shown in fig. 9, the anti-freezing assembly includes a second flow pipe 403, a third flow pipe 404, a water pump 8 and an electromagnetic valve 9 disposed at the right end of the second flow pipe 403, and a heat collecting tube temperature sensor 10 disposed at the bottom of the third flow pipe 404. The water pump 8, the electromagnetic valve 9 and the heat collecting pipe temperature sensor 10 are electrically connected with the controller 5.

The specific working process is as follows:

firstly, automatic water tank cleaning:

after the solar water heater is used for a period of time, when the sewage settling box 106 finds that the water quality is reduced or the water scale is increased, the second manual valve 112 is closed, the water mixing valve 110 is kept in a closed state, the container filled with the cleaning agent is installed on the cleaning agent feeding opening 109, the second manual valve 112 is opened, and the automatic water tank cleaning function is started through the controller 5: all functions are locked, the water level is automatically adjusted to be a designated height (higher than the upright column 310, the first floating plug 308 is prevented from blocking the third port 3073), the water pump 104 is automatically started, water in the solar water heater starts to enter the water return pipe 103 from the sewer pipe 102 under the action of the water pump, a cleaning agent is dissolved and taken away to enter the water supply pipe 101, and further water enters the water storage tank 2 from bottom to top. When water flow passes through the double-water-opening joint 301, the rubber membrane 302 in the double-water-opening joint 301 is turned upwards due to the impact of water and turned to the bottom of the elbow 305, the double-water-opening joint 301 and the elbow 305 are communicated to form a closed pipeline, water flows into the elbow 305 along the closed pipeline and is sprayed out from the opening of the elbow 305 to form a vortex, water scales on the periphery of the inner wall 201 of the water storage tank are washed, the cleaning agent is fully dissolved and brought into the water storage tank 2 after a period of circulation time, the water pump 104 stops working, and the cleaning agent is enabled to fully soak the water scales for a period of time. Then the water pump 104 is automatically started again to carry out vortex washing cleaning, the water pump 104 stops working, the blow-down valve 107 is automatically opened, and sewage in the water storage tank 2 is drained (when water flows downwards through the two-way water gap junction 301, the rubber membrane 302 turns downwards, and because the top of the two-way water gap junction 301 is level with or slightly lower than the inner wall 201 of the water storage tank, water or sediment directly enters the pipeline from the periphery without obstacles, so that the sewage can be drained). And further automatically opening a water feeding valve 105 to feed water to a specified height, automatically starting a water pump 104, further circularly flushing the water storage tank 2, the sewer pipe 102, the water feeding pipe 101 and the water return pipe 103, then automatically opening a drain valve 107 to drain, finally automatically opening the water feeding valve 105 to feed water to a set water level, automatically opening a heater to heat to a set temperature, and finishing the cleaning of the automatic water tank.

The water in the water storage tank 2 can be drained to reduce the descaling effect in the automatic cleaning and circulating process, so that the heater can automatically heat in the circulating and cleaning process, the temperature of the water is guaranteed, and a better descaling effect is achieved.

Secondly, automatic and comprehensive cleaning:

the cleaning content comprises automatic water tank cleaning and automatic heat collecting pipe cleaning, and the cleaning sequence is that the automatic water tank is cleaned first and then the automatic heat collecting pipe is cleaned. After starting, the automatic water tank does not work in the early stage of cleaning, and the scale is soaked for a period of time. Then, after the water pump 104 is automatically started again to perform the vortex washing cleaning, the water pump 104 does not stop working, and then the automatic heat collecting pipe cleaning preparation work is performed: the blowoff valve 107 is automatically opened to start discharging sewage, when the water level is reduced to the third port 3073, the first floating plug 308 blocks the third port 3073, so that the water in the water storage tank 2 can only enter through the opening at the tail end of the third conduit 404, the blowoff valve 107 is automatically closed, and the water pump 104 stops working at the moment to prompt the addition of the cleaning agent. Closing the second manual valve 112, keeping the closing state of the water mixing valve 110, replacing and installing the container filled with the cleaning agent on the cleaning agent feeding port 109, opening the second manual valve 112, and starting the automatic heat collecting pipe cleaning function through the controller 5: the water pump 104 is automatically started, water in the solar water heater enters the third conduit 404 from the tail end of the third conduit 404 under the action of the water pump, then enters the second conduit 403 and then enters the first conduit 402, so that the water enters the sewer pipe 101 and the water return pipe 103 through the water pipe connecting device 307, and finally dissolves and takes away the cleaning agent to enter the water storage tank 2 and the heat collecting pipe 6, the water is still further washed through soaking and secondary circulation, and after the water is sufficiently cleaned, the water pump 104 and the blow-down valve 107 are automatically and simultaneously opened for blow-down. When water in the water storage tank 2 cannot enter the heat collecting pipes 6, the water in the heat collecting pipes 6 is sucked out through the third guide pipe 404 under the action of the water pump and siphon, and when the water in any one heat collecting pipe 6 is completely sucked, the second floating plug 406 positioned at the tail end of the third guide pipe 404 blocks the third guide pipe 404 so as to lead out the water in other heat collecting pipes. When all the heat collecting pipes are drained, the water pump 104 is automatically stopped, the water feeding valve 105 is further automatically opened to feed water to a specified height, the water pump 104 is automatically started, the water storage tank 2, the sewer pipe 101, the water feeding pipe 102, the water return pipe 103 and the heat collecting pipes 6 are further circularly flushed, then the drain valve 107 is automatically opened, and meanwhile, the water pump 104 continues to work until the water in the heat collecting pipes is drained. And finally, automatically opening the water feeding valve 105 to feed water to a set water level, automatically opening the heater to heat to a set temperature, and automatically and comprehensively cleaning.

The first flow guide pipe 402 is arranged in the water storage tank 2 at a higher height than the second flow guide pipe 403 in the water storage tank 2, so that premature pressure relief caused by excessive air retention is avoided in the cleaning and emptying processes of the automatic heat collecting pipe.

Thirdly, freezing prevention:

when the anti-freezing device is normally used in winter, the upper water pipe 101 and the lower water pipe 102 are laid in parallel, and hot water in the lower water pipe 102 always flows, so that a large amount of heat can be brought to prevent freezing of the upper water pipe. The second conduit 403 and the third conduit 404 in the water storage tank 2 and the heat collecting pipe 6 are both made of copper with good heat conductivity, and can also play a role in preventing freezing for the heat collecting pipe 6. If the water-saving anti-freezing agent is not used for a long time in winter, the water-saving anti-freezing agent can be prevented from freezing by an emptying method.

An emptying method comprises the following steps: the water supply valve 105 is closed, the controller 5 forcibly opens the drain valve 107 to drain the water in the water storage tank 2 and the heat collecting pipe 6, and then all power supplies are turned off to prevent the whole solar water heater system from freezing.

Under the extreme weather condition, the heat collecting tube can not automatically absorb sunlight for a long time to heat, so that the water temperature in the heat collecting tube 6 is far lower than that in the water tank, when the heat collecting tube temperature sensor 10 at the tail end of the heat collecting tube 6 senses that the water temperature is lower than 2 ℃, the electromagnetic valve 9 and the water suction pump 8 are automatically opened to convey hot water into the second guide tube 403, the conveyed hot water can only be discharged from the tail end of the third guide tube 404 due to the long pipelines of the first guide tube 402 and the sewer pipe 102 and the action of the check valve 309, and the hot water enters the bottom end of the heat collecting tube 6. When the heat collecting pipe temperature sensor 10 senses that the water temperature reaches the set temperature, the water suction pump 8 is automatically stopped, and the electromagnetic valve 9 is closed. Thereby playing the anti-freezing effect of the heat collecting pipe 6.

The above-mentioned embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A solar water heater capable of automatically cleaning and preventing freezing is characterized by comprising a water storage tank (2), a heat collecting pipe (6) and a cleaning mechanism; the cleaning mechanism includes:

the internal circulation pipeline (1) comprises an upper water pipe (101) and a lower water pipe (102), a water return pipe (103) is arranged between the upper water pipe (101) and the lower water pipe (102), and a cleaning agent feeding opening (109) and a water pump (104) are arranged on the water return pipe (103);

the water storage tank cleaning component (3) is arranged at the bottom of the water storage tank (2) and is connected with the internal circulation pipeline (1);

and the heat collecting pipe (6) cleaning component is arranged at one end inside the water storage tank (2) and connected with the internal circulation pipeline (1), and the other end is arranged inside the heat collecting pipe (6).

2. The solar water heater capable of automatically cleaning and preventing freezing according to claim 1, wherein the storage water tank cleaning assembly (3) comprises:

the supporting plate (304) is fixedly connected with the water storage tank (2), and the double water inlet junction (301) is fixed on the supporting plate (304);

the top of the double water-passing port junction (301) is flush with or slightly lower than the inner wall (201) of the water storage tank, and the lower part of the double water-passing port junction is connected with the upper water pipe (101);

the rubber film (302) is arranged into a funnel type structure and is fixed in the double water inlet junction (301), and a pressing sheet (303) for fixing the rubber film (302) is arranged at the upper part of the rubber film (302);

the pressing sheet (303) is arranged in the double-water-opening joint (301) and structurally arranged into a circular sheet with a through hole in the middle;

a bracket (306), wherein the top of the bracket (306) is connected with an elbow (305), and the bottom of the bracket (306) is connected with the support plate (304);

the elbow (305) is arranged inside the water storage tank (2), the diameter of the bottom of the elbow (305) is larger than that of the top of the elbow, a height difference exists between the top of the elbow (305) and the top of the double water inlet joint (301), and the height difference is smaller than the height of the rubber membrane (302);

the sewer pipe connecting device (307) is arranged in the water storage tank (2) and connected with the sewer pipe (102), the sewer pipe connecting device (307) is arranged into an L-shaped three-way pipeline integrally and comprises an upper first port (3071), a lower second port (3072) and a side third port (3073), a first one-way valve (309) is arranged on one side of the third port (3073) of the sewer pipe connecting device (307), a vertical column (310) is arranged on the pipeline wall on one side of the third port (3073), a first floating plug (308) capable of moving along with water is connected onto the vertical column (310), and the first floating plug (308) is just located at the third port (3073) when no water exists, so that the blocking effect is achieved.

3. The solar water heater capable of automatically cleaning and preventing freezing as claimed in claim 2, wherein the angle between the elbow (305) and the inner wall of the longer side of the water storage tank (2) is set to be 30-60 degrees.

4. The solar water heater capable of automatically cleaning and preventing freezing as claimed in claim 2, wherein the elbow (305) is a telescopic multi-section elbow (305), and a spring plate (312) is connected to both ends of the elbow (305).

5. The solar water heater capable of automatically cleaning and preventing freezing as claimed in claim 2, wherein the elbow (305) is configured to have a bottom diameter larger than a top diameter and a middle diameter larger than the bottom diameter.

6. The solar water heater capable of automatically cleaning and preventing freezing as claimed in claim 1, wherein the water storage tank (2) comprises an inner wall (201) of the water storage tank, an insulating layer and an outer wall of the water storage tank (2), and an exhaust port is arranged above the water storage tank (2); a heater mounting opening (206), a magnesium rod mounting opening, a water temperature sensor mounting opening and a water level sensor mounting opening (205) are formed in the side face of the water storage tank (2); the bottom of the inner wall (201) of the water storage tank is downward convex, an opening is formed in the convex part, and the water storage tank cleaning component (3) penetrates through the opening to be connected with the water storage tank (2).

7. The solar water heater capable of automatically cleaning and preventing freezing according to claim 1, wherein the heat collecting pipe (6) cleaning assembly comprises:

the adapter (401) is arranged inside the water storage tank (2), one end of the adapter (401) is connected with the sewer pipe connecting device (307), and the other end of the adapter (401) is connected with the first guide pipe (402);

the first guide pipe (402) is arranged inside the water storage tank (2), one end of the first guide pipe (402) is connected with the adapter (401), and the other end of the first guide pipe (402) is connected with the second guide pipe (403);

the second flow guide pipe (403) comprises a main pipe and a plurality of branch pipe joints; the main pipe is arranged on the inner wall (201) of the water storage tank, and the branch pipe joint is connected with a third flow guide pipe (404) and inserted into the heat collecting pipe (6);

the third flow guide pipe (404) is arranged inside the heat collecting pipe (6), the bottom end of the third flow guide pipe (404) is in a bent hook shape, the opening of the bent hook shape is arranged to be a bell mouth, a second floating plug (406) capable of moving along with water is arranged above the bell mouth, and the second floating plug (406) is just positioned at the bell mouth when no water exists, so that the blocking effect is achieved;

and a support pad (405) is arranged outside the third flow guide pipe (404), and is used for supporting the third flow guide pipe (404) in the heat collecting pipe (6).

8. The solar water heater capable of automatically cleaning and preventing freezing as claimed in claim 1, further comprising an anti-freezing assembly, wherein the anti-freezing assembly comprises a second flow guide pipe (403), a third flow guide pipe (404), a water pump (8) and a solenoid valve (9) arranged at one end of the second flow guide pipe (403), and a heat collecting pipe temperature sensor (10) arranged at the bottom of the third flow guide pipe (404).

9. The solar water heater capable of automatically cleaning and preventing freezing as claimed in claim 1, wherein the bottom of the internal circulation pipeline (1) is provided with a dirt settling box (106), the dirt settling box (106) is provided as a transparent box body, the top opening of the box body is communicated with the upper water pipe (101), the middle of the box body is provided with a cleaning port for cleaning the dirt settling box (106), and the bottom of the box body is provided with a drain valve (107).

10. The solar water heater capable of automatically cleaning and preventing freezing as claimed in claim 9, further comprising a controller (5), wherein the controller (5) is electrically connected with the water pump (104), the heater, the water temperature sensor, the water level sensor, the drain valve (107) and the automatic water supply valve (105).