阅读说明：本技术 一种建筑节能太阳能蓄热供水系统 (Building energy-saving solar heat storage water supply system ) 是由 邓天元 戢三民 于 2021-07-15 设计创作，主要内容包括：本发明公开了一种建筑节能太阳能蓄热供水系统,包括储水箱、真空集热管、反射板、保温水箱和支撑架；所述反射板位于若干组所述真空集热管倾斜朝向下方的一侧,所述保温水箱的一端通过连接管与储水箱的内部连通；所述真空集热管包括玻璃外管和玻璃内管；所述玻璃外管与玻璃内管形成真空腔,所述真空腔内分别设置有弧形反射板和吸气膜；所述吸气膜贴合玻璃外管的内壁设置；所述玻璃外管的内壁上环形排列设置有透镜；两组所述弧形反射板对称设置在真空腔的内部且贴合玻璃外管的内壁,所述弧形反射板的外弧方向与玻璃内管的外壁相对应。本发明提高太阳能热水器热效率,提高保温性能。(The invention discloses a building energy-saving solar heat storage and water supply system which comprises a water storage tank, evacuated collector tubes, a reflecting plate, a heat preservation water tank and a support frame, wherein the evacuated collector tubes are arranged on the water storage tank; the reflecting plate is positioned on one side of the plurality of groups of vacuum heat collecting pipes which incline downwards, and one end of the heat-insulating water tank is communicated with the inside of the water storage tank through a connecting pipe; the vacuum heat collecting tube comprises a glass outer tube and a glass inner tube; the glass outer tube and the glass inner tube form a vacuum cavity, and an arc-shaped reflecting plate and a gas suction film are respectively arranged in the vacuum cavity; the air suction film is attached to the inner wall of the glass outer tube; lenses are arranged on the inner wall of the glass outer tube in an annular arrangement mode; the two groups of arc-shaped reflecting plates are symmetrically arranged in the vacuum cavity and attached to the inner wall of the glass outer tube, and the outer arc direction of each arc-shaped reflecting plate corresponds to the outer wall of the glass inner tube. The invention improves the heat efficiency of the solar water heater and the heat preservation performance.)

1. The utility model provides a building energy-conserving solar energy heat accumulation water supply system which characterized in that: comprises a water storage tank (1), a vacuum heat collecting pipe (2), a reflecting plate (3), a heat preservation water tank (5) and a support frame (6);

the water storage tank (1) and the reflecting plate (3) are both arranged on the supporting frame (6), a plurality of groups of vacuum heat collecting pipes (2) are arranged at the upper end of the reflecting plate (3) at equal intervals and are obliquely arranged, and the upper ends of the plurality of groups of vacuum heat collecting pipes (2) are both arranged on one side of the water storage tank (1) and are communicated with the inside of the water storage tank (1); the reflecting plates (3) are positioned on one side of the plurality of groups of vacuum heat collecting pipes (2) which incline downwards, the heat-insulating water tank (5) is fixedly arranged on the supporting frame (6), and one end of the heat-insulating water tank (5) is communicated with the inside of the water storage tank (1) through a connecting pipe;

the vacuum heat collecting tube (2) comprises a glass outer tube (201) and a glass inner tube (206);

the glass inner tube (206) is arranged inside the glass outer tube (201), the glass outer tube (201) and the glass inner tube (206) form a vacuum cavity (210), and an arc-shaped reflecting plate (208) and a getter film (203) are respectively arranged in the vacuum cavity (210); the air suction film (203) is attached to the inner wall of the glass outer tube (201); the inner wall of the glass outer tube (201) is provided with lenses (207) in an annular arrangement;

the two groups of arc-shaped reflecting plates (208) are symmetrically arranged in the vacuum cavity (210) and attached to the inner wall of the glass outer tube (201), and the outer arc direction of the arc-shaped reflecting plates (208) corresponds to the outer wall of the glass inner tube (206);

the outer surface of the glass inner tube (206) is provided with a light-gathering layer (202), a heat-conducting plate (209) is arranged in the glass inner tube (206), and the section of the heat-conducting plate (209) is coincided with the diameter of the glass inner tube (206).

2. The building energy-saving solar heat-storage water supply system according to claim 1, characterized in that: the water storage tank (1) comprises a tank body (101), a ball float valve (103) and a first temperature sensor (105);

one side of the box body (101) is communicated with a water inlet pipe (104), and the ball float valve (103) is fixedly arranged on one side of the inner wall of the box body (101); the first temperature sensor (105) is arranged at the inner top in the box body (101);

one side of the box body (101) is communicated with a water outlet pipe (106), and an adjusting valve (107) is arranged on the water outlet pipe (106); a water level gauge (108) is installed at the top in the box body (101).

3. The building energy-saving solar heat-storage water supply system according to claim 2, characterized in that:

one side of the box body (101) is communicated with an exhaust pipeline (110); the exhaust pipeline (110) is communicated with the interior of the box body (101); the vacuum tube box is characterized in that a plurality of groups of vacuum tube slots (109) are formed in the box body (101), and the vacuum tube slots (109) are located at the inner bottom of the box body (101) and are uniformly distributed.

4. The building energy-saving solar heat-storage water supply system according to claim 1, characterized in that: the light-gathering layer (202) comprises a metal layer (211) with a gradient film structure, a high-metal reflecting layer (212), a low-metal reflecting layer (213), an interference film (214) and an antireflection layer (215) which are sequentially arranged from inside to outside.

5. The building energy-saving solar heat-storage water supply system according to claim 1, characterized in that: the reflecting plate (3) comprises a condensing lens layer (301), a light reflecting plate (302), an ultraviolet blocking layer (303) and a bottom plate (304); the condensing lens layer (301), the light reflection plate (302) and the ultraviolet blocking layer (303) are sequentially arranged on the bottom plate (304) from outside to inside.

6. The building energy-saving solar heat-storage water supply system according to claim 1, characterized in that: one end fixed mounting of evacuated collector tube (2) has blowdown subassembly (4), the other end at evacuated collector tube (2) and keep away from storage water tank (1) is installed in blowdown subassembly (4) for the fixed incrustation scale of cleaing away.

7. The building energy-saving solar heat-storage water supply system according to claim 6, characterized in that: the sewage discharging assembly (4) comprises a box body (401) and a drawing box (404);

the drawing box (404) is connected to the inside of the box body (401) through a sealing plug thread; the two ends of the drawing box (404) are movably clamped in the box body (401), and the side wall of the end part of the drawing box (404) is movably attached to the inner wall of the box body (401).

8. The building energy-saving solar heat-storage water supply system according to claim 7, wherein: the drawing box (404) comprises baffle plates (402) and arc-shaped plates (403), wherein the two groups of baffle plates (402) are fixedly arranged at two ends of the arc-shaped plates (403) and are attached to the inner wall of the box body (401).

9. The building energy-saving solar heat-storage water supply system according to claim 1, characterized in that: the heat-preservation water tank (5) comprises a water tank shell (501), a heat-preservation layer (502), an inner water tank (503), an electric heating rod (504) and a second temperature sensor (505).

10. The building energy-saving solar heat-storage water supply system according to claim 9, wherein: the water tank shell (501) is made of aluminum-plated zinc plates, the heat preservation layer (502) is arranged in an interlayer between the water tank shell and the inner water tank (503), the heat preservation layer (502) is made of polyurethane and polystyrene heat preservation materials, the inner water tank (503) is made of stainless steel, and the second temperature sensor (505) and the electric heating rod (504) are arranged inside the inner water tank.

Technical Field

The invention belongs to the field of energy conservation, and particularly relates to a building energy-saving solar heat-storage water supply system.

Background

With the continuous improvement of energy-saving design consciousness, solar buildings play an important role in building resource energy-saving society, and become an important way for building energy-saving design gradually. The building energy consumption of China accounts for more than one third of the total national energy consumption, the development of national economy is severely restricted, the building energy-saving significance is great, and cooking and hot water account for a considerable proportion. In the face of energy crisis and environmental problems, the nation places high importance on the utilization of renewable energy. In the renewable energy law, countries encourage organizations and individuals to install and use solar water heating systems.

The existing solar water supply system converts solar energy into heat energy mainly by means of vacuum heat collecting pipes and utilizes the principle that hot water floats upwards and cold water sinks to make water generate microcirculation so as to achieve the required hot water. Most of the existing solar energy structures are integrated, a plurality of evacuated solar collector tubes are directly inserted into a heat-insulating water tank, the heat-insulating water tank needs to be grooved for installing the evacuated solar collector tubes, and the grooves are too many, so that the heat-insulating water tank is too long, the heat dissipation area ratio is large, and the heat-insulating effect is low; patent No. CN201910907605.1 discloses a solar heat storage device, which is formed by directly inserting a plurality of evacuated solar collector tubes into a heat-insulating water tank, and by setting the heat storage rod to be rod-shaped and hollow inside, one end is a heat dissipation section, and the other end is a heat storage section, and the heat storage of a solar system is realized by sealing a heat storage material inside the heat storage section, but the device has the problems that the above-mentioned grooves are too many, the heat-insulating water tank is too long, and the proportion of the heat dissipation area is large.

Disclosure of Invention

Aiming at the problems, the invention provides a building energy-saving solar heat storage water supply system which comprises a water storage tank, evacuated collector tubes, a reflecting plate, a heat preservation water tank and a support frame;

the water storage tank and the reflecting plate are both arranged on the supporting frame, a plurality of groups of vacuum heat collecting pipes are arranged at the upper end of the reflecting plate at equal intervals and are obliquely arranged, and the upper ends of the plurality of groups of vacuum heat collecting pipes are all arranged on one side of the water storage tank and are communicated with the inside of the water storage tank; the reflecting plate is positioned on one side of the plurality of groups of vacuum heat collecting pipes which incline downwards, the heat-insulating water tank is fixedly arranged on the supporting frame, and one end of the heat-insulating water tank is communicated with the inside of the water storage tank through a connecting pipe;

the vacuum heat collecting tube comprises a glass outer tube and a glass inner tube;

the glass inner tube is arranged inside the glass outer tube, the glass outer tube and the glass inner tube form a vacuum cavity, and an arc-shaped reflecting plate and a gas suction film are respectively arranged in the vacuum cavity; the air suction film is attached to the inner wall of the glass outer tube; the inner wall of the glass outer tube is provided with lenses in an annular arrangement manner;

the two groups of arc-shaped reflecting plates are symmetrically arranged in the vacuum cavity and attached to the inner wall of the glass outer tube, and the outer arc direction of the arc-shaped reflecting plates corresponds to the outer wall of the glass inner tube;

the outer surface of the glass inner tube is provided with a light-gathering layer, the inside of the glass inner tube is provided with a heat-conducting plate, and the section of the heat-conducting plate is coincided with the diameter of the glass inner tube.

Further, the water storage tank comprises a tank body, a ball float valve and a first temperature sensor;

one side of the box body is communicated with a water inlet pipe, and the ball float valve is fixedly arranged on one side of the inner wall of the box body; the first temperature sensor is arranged at the inner top in the box body;

one side of the box body is communicated with a water outlet pipe, and an adjusting valve is arranged on the water outlet pipe; and a water level meter is arranged at the top in the box body.

Further, one side of the box body is communicated with an exhaust pipeline; the exhaust pipeline is communicated with the interior of the box body; the vacuum tube box is characterized in that a plurality of groups of vacuum tube slots are arranged in the box body, and are located at the inner bottom of the box body and are uniformly distributed.

Furthermore, the light-gathering layer comprises a metal layer with a gradual change film structure, a high metal reflecting layer, a low metal reflecting layer, an interference film and an antireflection layer which are sequentially arranged from inside to outside.

Further, the reflecting plate comprises a condensing lens layer, a light reflecting plate, an ultraviolet blocking layer and a bottom plate; the condensing lens layer, the light reflecting plate and the ultraviolet blocking layer are sequentially arranged on the bottom plate from outside to inside.

Furthermore, one end of the vacuum heat collecting pipe is fixedly provided with a sewage discharge assembly (), and the sewage discharge assembly is arranged at the other end of the vacuum heat collecting pipe, which is far away from the water storage tank, and is used for fixedly removing water scales.

Further, the sewage discharge assembly comprises a box body and a drawing box;

the drawing box is connected to the inside of the box body through a sealing plug thread; the two ends of the drawing box are movably clamped in the box body, and the side wall of the end part of the drawing box is movably attached to the inner wall of the box body.

Further, the pull box includes baffle and arc, and two sets of baffle fixed mounting are at the both ends of arc, and the setting of laminating box body inner wall.

Furthermore, the heat preservation water tank comprises a water tank shell, a heat preservation layer, an inner water tank, an electric heating rod and a second temperature sensor.

Further, the water tank shell sets up to aluminized zinc plate material, the heat preservation is arranged in the intermediate layer between water tank shell and the inner water tank, the heat preservation sets up to polyurethane and polystyrene insulation material, the inner water tank sets up to stainless steel, the inside of water tank including second temperature sensor and the setting of electrical heating rod.

The invention has the beneficial effects that:

1. the invention raises the hot water in the vacuum heat collecting pipe to the water storage tank and then transfers the hot water to the heat insulation box for heat insulation, and the water storage tank is only in water storage transition; the heat loss speed of hot water in the heat preservation box is low, and the heat efficiency of the solar water heater is improved.

2. The reflecting plate is arranged on the support at the lower end of the vacuum heat collecting tube, and the arc-shaped reflecting plate, the lens and the light-gathering layer in the vacuum heat collecting tube are matched with the external reflecting plate, so that the performance of absorbing light is improved, and the effects of super absorption, less heat loss, energy conservation and quick temperature rise are achieved.

3. Through blowdown subassembly, regularly clear up the incrustation scale that produces among the evacuated collector tube, compare the tradition and dismantle back washing incrustation scale with evacuated collector tube, it is simple and convenient to maintain.

Drawings

FIG. 1 is a schematic perspective view of a building energy-saving solar thermal storage water supply system according to an embodiment of the invention;

FIG. 2 shows a schematic view of a support frame structure according to an embodiment of the invention;

FIG. 3 shows a schematic cross-sectional view of a water storage tank structure of an embodiment of the present invention;

FIG. 4 shows a schematic cross-sectional view of a glass outer tube structure of an embodiment of the invention;

FIG. 5 shows a schematic cross-sectional view of a glass innerduct structure in accordance with an embodiment of the present invention;

FIG. 6 shows a schematic cross-sectional view of a light-concentrating layer structure of an embodiment of the present invention;

FIG. 7 shows a schematic cross-sectional view of a reflector structure of an embodiment of the invention;

FIG. 8 shows a cross-sectional schematic view of a blowdown assembly structure of an embodiment of the present invention;

FIG. 9 shows a cross-sectional schematic view of a blowdown assembly structure of an embodiment of the present invention;

fig. 10 shows a schematic cross-sectional view of a holding water tank structure according to an embodiment of the present invention.

In the figure: 1. a water storage tank; 101. a box body; 102. a water inlet; 103. a float valve; 104. a water inlet pipe; 105. a first temperature sensor; 106. a water outlet pipe; 107. adjusting the valve; 108. a water level gauge; 109. a vacuum tube slot; 110. an exhaust duct; 2. a vacuum heat collecting tube; 201. a glass outer tube; 202. a light-condensing layer; 203. a getter film; 204. a first connecting member; 205. a second connecting member; 206. a glass inner tube; 207. a lens; 208. an arc-shaped reflecting plate; 209. a heat conducting plate; 210. a vacuum chamber; 211. a metal layer having a graded film structure; 212. a high metal reflective layer; 213. a low metal reflective layer; 214. an interference film; 215. an anti-reflection layer; 3. a reflective plate; 301. a condensing lens layer; 302. a light reflecting plate; 303. an ultraviolet blocking layer; 304. a base plate; 4. a blowdown assembly; 401. a box body; 402. a baffle plate; 403. an arc-shaped plate; 404. a box is drawn out; 5. a heat preservation water tank; 501. a water tank housing; 502. a heat-insulating layer; 503. an inner water tank; 504. an electrical heating rod; 505. a second temperature sensor; 6. a support frame; 601. a first support frame; 602. a second support frame.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 invention.

The embodiment of the invention provides a building energy-saving solar heat-storage water supply system, which comprises a water storage tank 1, evacuated collector tubes 2, a reflecting plate 3, a heat-preservation water tank 5 and a support frame 6, and is exemplarily shown in fig. 1 and 2;

the support frame 6 comprises a first support frame 601 and a second support frame 602, the water storage tank 1 and the reflecting plate 3 are both mounted on the first support frame 601, the reflecting plate 3 inclines by 38-50 degrees, the area of the solar water heater is limited, sunlight irradiates at an angle with the ground plane, in order to maximize the irradiated area, the solar water heater adopts an inclined mounting mode, the obliquely mounted water heater can reduce the irradiated area, meanwhile, the inclined mounting mode has the effect of reducing the action force on vertically impacted hailstones, and the specific mounting angle between 38-50 degrees is referred to according to the local geographical position and the solar sunshine condition of the region.

The evacuated collector tubes 2 are arranged above the reflecting plate 3 at equal intervals, the interval between the outer wall of the evacuated collector tubes 2 and the upper surface of the reflecting plate 3 is 5-10cm, a reflecting space is reserved at certain intervals, and one end of each of a plurality of groups of evacuated collector tubes 2 is communicated with the inside of the water storage tank 1;

the heat-preservation water tank 5 is fixedly arranged on the second support frame 602, and one end of the heat-preservation water tank 5 is communicated with the inside of the water storage tank 1 through a connecting pipe;

the tank 1 comprises a tank 101, a float valve 103 and a first temperature sensor 105, as shown in fig. 3 for example.

The box 101 is configured as a cylinder, and a cylinder made of the same material has a larger volume than the volume of the cylinder, so that more liquid can be contained.

A water inlet 102 is formed in one side of the box body 101, a water inlet pipe 104 is communicated with one side of the water inlet 102, and a ball float valve 103 is fixedly installed on one side, close to the inner wall of the box body 101, of the water inlet 102; the first temperature sensor 105 is installed at the upper top inside the case 101.

One side of the box body 101 is communicated with a water outlet pipe 106, and an adjusting valve 107 is arranged on the water outlet pipe 106; a water level gauge 108 is arranged at the top in the box body 101;

the floating ball in the ball float valve 103 always floats on the water, and when the water surface rises, the floating ball rises. The floating lifting drives the connecting rod to lift. The connecting rod is connected with the valve at the other end, and when the connecting rod rises to a certain position, the connecting rod supports the rubber piston pad to block the water inlet 102, and the water inlet is stopped. When the water level descends, the buoy also descends, and the connecting rod drives the piston pad to open to start water inlet;

the water level gauge 108 is used for sensing the height of the water level after water enters, when the water level reaches a top end set position, the first temperature sensor 105 acquires water temperature information and sends the temperature information to the controller, and the controller controls the valve switch of the regulating valve 107 according to the water level information and the temperature information to supply hot water to the inside of the heat preservation water tank 5 for heat preservation;

an exhaust pipeline 110 is communicated with one side of the box body 101; one end of the exhaust pipeline 110 is positioned at the top of the box body 101 and is connected with the inside of the box body 101, and the other end of the exhaust pipeline is communicated with the outside air; the vacuum tube storage box is characterized in that a plurality of groups of vacuum tube slots 109 are formed in the box body 101, and the vacuum tube slots 109 are located at the inner bottom of the box body 101 and are evenly distributed.

The evacuated collector tube 2 comprises an outer glass tube 201 and an inner glass tube 206, as shown in fig. 4, 5 and 6 for example.

The glass inner tube 206 is arranged inside the glass outer tube 201, the glass outer tube 201 and the glass inner tube 206 form a vacuum cavity 210, arc-shaped reflecting plates 208 and a gas suction film 203 are respectively arranged in the vacuum cavity 210, two groups of arc-shaped reflecting plates 208 are symmetrically arranged inside the vacuum cavity 210 and are attached to the inner wall of the glass outer tube 201, the outer arc direction of each arc-shaped reflecting plate 208 corresponds to the outer wall of the glass inner tube 206, the larger the visual index of an arc-shaped plate visual field meter in each arc-shaped reflecting plate 208 is, the larger the peripheral visual field value is, the larger the reflected sunlight surface is, and the heating area of the glass inner tube is increased; the air suction film 203 is attached to the inner wall of the glass outer tube 201; lenses 207 are arranged on the inner wall of the glass outer tube 201 in an annular arrangement mode;

the getter film 203 is used to absorb residual or permeated gas in the vacuum chamber 210 interlayer and maintain the vacuum degree of the vacuum interlayer. The air suction film 203 is a silvery film formed by deposition of a getter on the inner wall of a round head part of the outer tube after the getter is evaporated by high-frequency electric heating, has an air suction effect, and generates solid substances through reaction of residual gas in a vacuum interlayer of the vacuum heat collection tube 2 so as to improve and maintain the vacuum degree in the vacuum interlayer and achieve the purpose of prolonging the service life of the vacuum heat collection tube 2. The gas pressure in the interlayer between the outer tube and the inner tube of the vacuum heat collecting tube 2 is low enough, so that the heat conduction and the heat convection of the gas can be ignored, and the heat preservation effect of the vacuum heat collecting tube 2 is improved. Getter film 203 is a bright silvery-white mirror when active and a translucent milky-white substance when inactive.

Illustratively, as shown in fig. 5, the outer surface of the glass inner tube 206 is provided with a light-gathering layer 202, the inside of the glass inner tube 206 is provided with a heat-conducting plate 209, and the heat-conducting plate 209 is arranged at the center of the inner diameter of the glass inner tube 206.

The outer wall of the glass inner tube 206 is fixedly connected with the inner wall of the glass outer tube 201 through a first connecting piece 204, and the two groups of glass inner tubes 206 are fixedly connected through a second connecting piece 205.

Illustratively, as shown in fig. 6, the light-gathering layer 202 is, from inside to outside: a metal layer 211 having a graded film structure, a high metal reflective layer 212, a low metal reflective layer 213, an interference film 214, and a antireflection layer 215.

The high metal reflective layer 212 mainly acts as a reflector, i.e. it reflects back the heat radiated from the medium inside the inner tube.

The gradual change film of the metal layer 211 with the gradual change film structure is a multilayer film, the absorption layer of the gradual change film structure is provided with 9 layers, the absorption layer mainly plays a role of converting light energy into heat energy, the absorption layer absorbs solar rays layer by layer, and the performance of the absorption layer of the gradual change film structure gradually becomes higher.

The absorption layer of the interference film 214 has two layers, and interference is generated due to different metal component ratios, so that the absorption ratio is increased and the emission ratio is reduced. Because the stainless steel ions in the metal layer are high temperature resistant and sun-resistant, the film layer is not aged, attenuated or discolored at 400 ℃. The interference film 214 plus the antireflection layer 215 serves to reduce the effect of solar reflection; therefore, higher absorption ratio and lower emission ratio are realized, the heat collection efficiency is greatly improved, and the effects of super absorption, less heat loss and quick temperature rise are achieved by matching the arc-shaped reflecting plate 208 and the air suction film 203 in the glass outer tube 201. Under the same illumination condition, the water heater can heat water with more temperature than the prior common pipe.

The antireflection layer 215 also functions as an antireflection film or a protective film for the metal layer 211, the high-metal reflection layer 212, the low-metal reflection layer 213, and the interference film 214 having a graded film structure inside, at the outermost layer.

The reflector 3 is shown to include a condensing lens layer 301, a light reflecting plate 302, an ultraviolet blocking layer 303, and a base plate 304, as exemplarily shown in fig. 7.

The condensing lens layer 301, the light reflecting plate 302, ultraviolet barrier layer 303 are installed on bottom plate 304 from outside to inside in proper order, the sunshine shines most and shines on evacuated collector tube 2 surfaces, after the sunshine of shining in the follow space carries out the spotlight through condensing lens layer 301, condensing lens layer 301 camera lens is constituteed by several lens, there is good refractive power, then reflect the back of evacuated collector tube 2 through light reflecting plate 302, reduce the condition that the 2 shadow faces of evacuated collector tube are heated slowly, increase the rate of utilization of sunshine.

The lower end of the vacuum heat collecting pipe 2 is fixedly provided with a sewage discharging component 4, and the sewage discharging component 4 is arranged at the other end of the vacuum heat collecting pipe 2 away from the water storage tank 1 and is used for removing water scales for a fixed time; the waste disposal assembly 4 comprises a box body 401 and a drawing box 404, as shown in fig. 8 and 9.

The drawing box 404 is connected to the inside of the box body 401 through a sealing plug thread; the two ends of the drawing box 404 are movably clamped in the box body 401, and the side wall of the end of the drawing box 404 is movably attached to the inner wall of the box body 401.

The pull box comprises baffles 402 and arc-shaped plates 403, wherein the two groups of baffles 402 are fixedly arranged at two ends of the arc-shaped plates 403 and are attached to the inner wall of the box body 401.

In the in-service use, the internal long-term use of evacuated collector tube 2 can produce the incrustation scale, and the incrustation scale can descend in the bottom because of gravity along with under quiescent condition, gets into blowdown subassembly 4, and is rotatory with pull box 404 through wrench movement sealing plug, and after rotatory certain angle, the exit of evacuated collector tube 2 is blocked to the position of arc 403, pulls out pull box 404 again, avoids the incrustation scale backward flow to get into evacuated collector tube 2 inside, will have the water clearance of incrustation scale to come out. Can regularly clear up, compare the tradition and demolish back washing clearance with evacuated collector tube, it is simple and convenient to maintain.

The heat-preservation water tank 5 comprises a water tank shell 501, a heat-preservation layer 502, an inner water tank 503, an electric heating rod 504 and a second temperature sensor 505, and is exemplarily shown in fig. 10.

The water tank shell 501 is made of aluminum-plated zinc plates, the heat insulation layer 502 is located in an interlayer between the water tank shell and the inner water tank 503, the heat insulation layer 502 is made of polyurethane and polystyrene heat insulation materials, the inner water tank 503 is made of stainless steel, and the second temperature sensor 505 and the electric heating rod 504 are arranged inside the inner water tank.

The working process is as follows: solar radiation penetrates through the outer glass tube 201 of the evacuated collector tube 2, is absorbed by the arc-shaped reflecting plate 208 and the light-gathering layer 202 of the inner glass tube 206 and then is transmitted to the water in the inner glass tube 206 along the inner tube wall, the water is heated and gradually rises in temperature at the moment, the specific gravity is reduced and rises to form upward power, a thermosiphon system is formed, the water is continuously moved upwards along with hot water and stored at the upper part of the water storage tank, meanwhile, the water with lower temperature is continuously supplemented along the other side of the tube, the circulation is repeated, and finally the whole tank of water is raised to a certain temperature.

The controller controls the valve switch of the regulating valve 107 based on the water level information of the water level gauge 108 and the temperature information of the first temperature sensor 105, and supplies hot water to the inside of the hot water tank 5 to keep warm.

The water reaching a certain temperature reaches the heat preservation water tank 5 from the water storage tank 1 to form a split solar water heater, and in winter or under the condition that sunshine is insufficient in rainy days, the water is heated to a certain temperature in the heat preservation water tank 5 through the electric heating rod, and the water in the heat preservation water tank 5 is electrically heated at a constant temperature for a second time for people to use.

Regularly maintain evacuated collector tube 2, inside avoiding the incrustation scale backward flow to get into evacuated collector tube 2 through blowdown subassembly 4, clear up out the water that will have the incrustation scale, compare the tradition and demolish back washing clearance with evacuated collector tube, it is simple and convenient to maintain.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.