CN202835842U - Pressure bearing type solar thermal collector - Google Patents

Abstract

A pressurized solar heat collector relates to a solar heat collection tube. The heat collector is mainly composed of an upper joint, a heat collecting assembly, a glass tube, a lower joint and a hollow screw, wherein: the heat collecting assembly is composed of a water diversion end, a heat collection pipe and a water collection end, and the water diversion end has a water diversion The through hole and the central through hole c, the water collecting end has the water collecting through hole and the central through hole b, the heat collecting tube has a heat collecting cavity, and the two ends of the heat collecting tube are respectively connected to the water dividing through hole and the water collecting through hole; The inner space of the glass tube constitutes a vacuum chamber, and the heat collecting tube is arranged in the vacuum chamber. The water diversion end and the water collecting end respectively constitute the heads at both ends of the vacuum chamber; the hollow screw connects the upper joint, the heat collecting assembly, the glass tube and the lower joint Fastened into one piece. The solar collector can withstand the water supply pressure of tap water and can absorb solar energy efficiently. It can be used in the central hot water system of the building and in the central heating system to expand the range of solar energy utilization, reduce the consumption of coal resources and reduce pollution of the environment.

Description

A pressurized solar collector

technical field

The utility model relates to solar water heating equipment, in particular to a solar heat collecting tube. the

Background technique

Solar energy is a clean natural renewable energy, inexhaustible and inexhaustible, and it is an energy that can be shared by all. At present, human beings have made significant progress in the utilization of solar energy, especially in the field of solar water heaters, which are widely used. The core component of the solar water heater is a glass vacuum tube. The glass vacuum tube is composed of an inner glass tube and an outer glass. The inner and outer layers are evacuated into a vacuum. Coated with a spectrally selective absorbing coating, it is used to absorb solar radiation energy to the maximum extent. After being irradiated by sunlight, photons hit the coating, and the solar energy is converted into heat energy. The heat energy is transferred to the water in the tube, the water temperature rises, the density decreases, and the heat The water moves upwards, while the specific cold water descends, and the hot water is always located in the upper insulation water tank. The temperature rise of the hot water in the solar water heater has little to do with the outside temperature, but mainly depends on the light. At present, the glass vacuum tubes used in civil solar water heaters are very scientifically designed, and the manufacturing technology is quite mature. Among them, the three tubes with "high temperature resistance, high cold resistance, and high-efficiency absorption" have realized super absorption, less heat loss, and fast heating. As a result, as long as there is light, hot water will be produced as usual at minus 30°C. However, the glass vacuum tube can only work under normal pressure, and a little water pressure will cause the glass vacuum tube to explode. Therefore, the scope of use is limited, and it can only be installed on the roof by every family. It is full of solar water heaters one by one, which is unsightly. the

Contents of the invention

The purpose of this utility model is to overcome the shortcomings of glass vacuum tubes and provide a heat collector that can withstand the water supply pressure of tap water and absorb solar energy efficiently. It can be used in the central hot water system of buildings and in the central heating system. , to expand the scope of solar energy utilization, reduce the consumption of coal resources and reduce environmental pollution, and protect the ecological environment. the

A pressurized solar heat collector of the present utility model is mainly composed of an upper joint (2), a heat collecting assembly, a glass tube (7), a lower joint (18) and a hollow screw (23), wherein: the upper joint (2 ) has a water outlet (1), an upper socket, a water collection channel (28) and a central through hole a; the heat collection assembly consists of a water distribution terminal (11), a heat collection pipe (10) and a water collection terminal (6) Composition, on the water diversion end (11) there is the water diversion through hole (20) and the center through hole c, on the water collection end (6) there is the water collection through hole (26) and the center through hole b, the heat collecting pipe (10 ) has a heat collecting cavity (22), and the two ends of the heat collecting tube (10) are respectively connected to the water dividing through hole (20) and the water collecting through hole (26); the inner space of the glass tube (7) forms a vacuum chamber (9 ); the lower joint (18) has a water inlet (16), a lower socket, a water diversion channel (17) and a central through hole d; the heat collecting tube (10) is arranged in the vacuum chamber (9), and the water diversion terminal ( 11) and the water-collecting end (6) form the heads at both ends of the vacuum chamber (9), and the upper socket of the upper joint (2) is set on one end of the glass tube (7) and the water-collecting end (6). The lower socket of the lower joint (18) is set on the other end of the glass tube (7) and the water diversion end (11); the hollow screw (23) is a fastener, and the hollow screw (23) passes through the upper joint ( 2) the central through hole a, the central through hole b of the water collecting terminal (6), the vacuum chamber (9), the central through hole c of the water diversion terminal (11), the central through hole d of the lower joint (18) , use the upper fastening nut (3) and the lower fastening nut (14) to fasten the upper joint (2), the heat collecting assembly, the glass tube (7) and the lower joint (18) into one; the lower joint (18) The water inlet (16) is connected to the heat collecting chamber (22) in the heat collecting tube (10) through the water diversion channel (17) and the water diversion through hole (20) in turn, and the heat collecting chamber (22) is sequentially passed through the water collecting through hole ( 26). The water collecting channel (28) is connected to the water outlet (1) of the upper joint (2). the

In the utility model, there is a vacuum port (4) on the upper joint (2), a vacuum channel (5) on the water collecting end (6), and the vacuum port (4) is connected to the vacuum channel (5) ), the vacuuming channel (5) is connected to the vacuum chamber (9), and the vacuuming interface (4) is connected by a vacuuming copper tube. the

In the utility model, there are at least two heat collecting pipes (10), and the number of water diversion through holes (20) on the water diversion end (11) and the number of water collection through holes (26) on the water collection end (6) Corresponding to the number of heat-collecting tubes (10); the heat-collecting tubes (10) are made of red copper, and the outer surface of the heat-collecting tubes (10) is coated with selective absorbing paint to absorb solar radiation energy. The selective absorbing paint Materials include copper oxide, black nickel, black chrome, black zinc, black copper. the

In the utility model, there is a reflective film (8) inside the glass tube (7), and the reflective film (8) is covered on a 180° semicircular arc surface. the

In the utility model, between the glass tube (7) and the upper joint (2), between the glass tube (7) and the lower joint (18), between the upper joint (2) and the water collecting terminal (6), There are silica gel pads between the lower joint (18) and the water diversion terminal (11). The silica gel pads are used as sealing elements and elastic elements at the same time. When the temperature changes cause the collector parts to expand and contract, the silica gel pads play a compensating role. the

In the utility model, there is a getter or a getter film in the vacuum chamber (9), the getter includes zirconium aluminum 16, zirconium vanadium iron and zirconium graphite, and the getter film includes barium, strontium , magnesium and calcium are the getter film attached to the inner wall of the glass tube (7) by evaporating from the main material. The getter or the getter film is used to absorb the trace gas produced by the heat collector after being heated, so as to maintain the vacuum degree in the vacuum chamber (9). the

In the utility model, the hollow screw (23) has a cooling chamber (24), the inlet of the cooling chamber (24) is connected to the water inlet (16), and the outlet of the cooling chamber (24) is connected to the water outlet (1). the

In the above utility model, the vacuum degree of the vacuum chamber (9) is less than 0.05Pa, which can reduce the heat loss caused by air convection and conduction; the selective absorption coating on the outer surface of the heat collecting tube (10) can efficiently absorb the energy of solar radiation , and then pass it to the water in the heat collecting chamber (22) through the copper material. After the water heats up, the density becomes smaller and rises, and it is discharged from the heat collector through the upper water outlet (1), and then enters the heat preservation water tank through the heat preservation pipe. , cold water is replenished from the lower water inlet (16) into the heat collecting cavity (22) for cyclic heating; the heat collecting tube (10) in the vacuum chamber (9) not only receives the energy of the front solar radiation, but also receives the back glass tube The solar radiation energy reflected by the upper reflective film (8) increases the energy absorbed by the heat collecting tube (10). the

In the above utility model, the working pressure of the heat collector is determined by the diameter and wall thickness of the heat collecting tube (10). When the nominal diameter of the heat collecting tube (10) is 25mm and the wall thickness is 2mm, the working pressure of the heat collector Reaching more than 4MPa, even if the collector is installed on the ground, it can also supply domestic hot water or heating medium water for buildings with a height of more than 400 meters. the

Among the above utility models: the glass tube (7) is made of G3.3 high borosilicate glass material; the heat collecting tube (10) is made of copper material; the water collecting terminal (6) and the water diverting terminal (11) are made of brass or stainless steel ; The upper joint (2), the lower joint (18), the hollow screw rod (23), the upper fastening nut (3) and the lower fastening nut (14) are made of stainless steel. the

The pressurized solar heat collector of the utility model is flexible in use and convenient in installation, and is installed independently from the heat preservation water tank, and then connected through heat preservation pipes. The collectors can be used in parallel or in series, and can be installed in a single layer or in multiple layers. The installation location depends on the site environment. It can be installed on the sunny outer wall, on the ground, on the roof or on the balcony. Pressurized solar collectors can be used as heating equipment for central hot water systems in buildings or as auxiliary heating equipment for central heating systems. the

The utility model has the beneficial effects of providing a heat collector capable of withstanding tap water supply pressure and efficiently absorbing solar energy, flexible in use, convenient in installation, and adaptable to different use occasions. The pressurized solar heat collector of the utility model can be used as a heating device for a central hot water system of a building or as an auxiliary heating device for a central heating system to expand the range of solar energy utilization, reduce the consumption of coal resources and reduce environmental pollution. Protect the environment. the

Description of drawings

Fig. 1 is a structural diagram of a pressure-bearing solar heat collector of the present utility model;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is a sectional view taken along line BB of Fig. 1 . the

In the figure: 1. Water outlet, 2. Upper joint, 3. Upper fastening nut, 4. Vacuuming interface, 5. Vacuuming channel, 6. Water collection end, 7. Glass tube, 8. Reflective film, 9 .Vacuum chamber, 10. Heat collector tube, 11. Water diversion end, 12. Silicone pad f, 13. Outer hexagon of the lower joint, 14. Lower fastening nut, 15. Connecting thread of the lower joint, 16. Water inlet, 17. Water distribution channel, 18. Lower joint, 19. Silicone pad e, 20. Water distribution hole, 21. Silicone pad d, 22. Heat collection chamber, 23. Hollow screw, 24. Screw cooling chamber, 25. Silicone Pad c, 26. water collection through hole, 27. silica gel pad b, 28. water collection channel, 29. outer hexagon of upper joint, 30. silica gel pad a, 31. connecting thread of upper joint. the

Detailed ways

The embodiment shown in accompanying drawing 1 is a kind of pressurized solar heat collector of the present invention, mainly consists of upper joint (2), heat collecting assembly, glass tube (7), lower joint (18) and hollow screw ( 23) composition, wherein: the upper joint (2) has a water outlet (1), an upper socket, a water collection channel (28), a vacuum interface (4) and a central through hole a, and the water collection channel (28) is three Only, according to the axis of the upper joint (2), it is arranged in a ring; the heat collection assembly is composed of the water distribution terminal (11), the heat collection pipe (10) and the water collection terminal (6), and the water distribution terminal (11) is There are water-distributing through holes (20) and a central through-hole c, and there are three water-distributing through-holes (20), which are arranged circularly according to the axis of the water-distributing terminal (11), and there is a collector on the water-collecting terminal (6). Water through hole (26), vacuum channel (5) and center through hole b, water collecting through hole (26) is three, according to the axis of water collecting end (6) in circular arrangement, heat collecting tube (10) There is a heat collecting cavity (22) inside, and there are three heat collecting tubes (10), and the two ends of the three heat collecting tubes (10) are respectively welded to three water-distributing through-holes (20) and three water-collecting through-holes (26 ) above; the inner space of the glass tube (7) forms a vacuum chamber (9), and there is a reflective film (8) inside the glass tube (7), and the reflective film (8) covers a 180° semicircular surface; the lower joint (18) There is a water inlet (16), a lower socket, a water diversion channel (17) and a central through hole d, and there are three water diversion channels (17), which are arranged in a ring according to the axis of the lower joint (18); The heat collecting tube (10) is set in the vacuum chamber (9), the water diversion end (11) and the water collection end (6) form the heads at both ends of the vacuum chamber (9) respectively, and the upper socket of the upper joint (2) Set on one end of the glass tube (7) and the water collecting end (6), the lower socket of the lower joint (18) is set on the other end of the glass tube (7) and the water diversion end (11); the hollow screw (23) is a fastener, and the hollow screw (23) passes through the central through hole a of the upper joint (2), the central through hole b of the water collection end (6), the vacuum chamber (9), and the water diversion end (11) center through hole c, center through hole d of lower joint (18), use upper fastening nut (3) and lower fastening nut (14) to connect upper joint (2), heat collecting assembly, glass tube ( 7) It is fastened together with the lower joint (18). Between the upper fastening nut (3) and the upper joint (2) there are spring washers and flat washers in sequence. Between the lower fastening nut (14) and the lower joint (18) There are spring washers and flat washers in turn; the hollow screw (23) has a cooling chamber (24), the inlet of the cooling chamber (24) is connected to the water inlet (16), and the outlet of the cooling chamber (24) is connected to the water outlet ( 1); there is a silicone pad c (25) between the glass tube (7) and the upper joint (2), a silicone pad d (21) between the glass tube (7) and the lower joint (18), and a silicone pad d (21) between the upper joint There is a silicone pad b (27) between (2) and the water collection terminal (6), a silicone pad e (19) between the lower joint (18) and the water distribution terminal (11), and a silicone pad e (19) between the upper joint (2) There is a silicone pad a (30) between the fastening flat washer, and the lower joint ( 18) There is a silicone pad f (12) between the fastening flat washer, and the silicone pad is used as a sealing element and an elastic element at the same time. When the temperature changes cause the collector parts to expand and contract, the silicone pad acts as a compensation. the

In this embodiment, the water inlet (16) of the lower joint (18) is connected to the heat collecting cavity (22) in the heat collecting pipe (10) through the water diversion channel (17) and the water diversion through hole (20) in sequence, and the heat collection The cavity (22) is connected to the water outlet (1) of the upper joint (2) through the water collection through hole (26) and the water collection channel (28) in sequence; The copper pipe is connected, the vacuum port (4) is connected to the vacuum channel (5) of the water collection terminal (6), and the vacuum channel (5) is connected to the vacuum chamber (9). the

In this embodiment, the glass tube (7) is made of G3.3 high borosilicate glass; the water collecting end (6) and the water diversion end (11) are made of brass or stainless steel; the upper joint (2), the lower joint (18), the hollow screw rod (23), the upper fastening nut (3) and the lower fastening nut (14) are made of stainless steel; the heat collecting pipe (10) is made of red copper, and the nominal diameter of the heat collecting pipe (10) is 25mm, The wall thickness is 2mm, and the outer surface of the heat collecting tube (10) is coated with selective absorption paint to absorb solar radiation energy. The materials of the selective absorption paint include copper oxide, black nickel, black chrome, black zinc, Black copper; in the vacuum chamber (9), there are zirconium-aluminum 16 getters and a getter film with barium, strontium, magnesium, and calcium as the main materials evaporated and attached to the inner wall of the glass tube (7) to absorb heat The trace gas generated after the device is heated to maintain the vacuum degree in the vacuum chamber (9). the

After the heat collector of this implementation is assembled, use a vacuum pump to connect to the vacuum copper tube of the upper joint (2) for vacuuming operation. When the vacuum degree of the vacuum chamber (9) is less than 0.05Pa, close the upper joint (2) ) at the vacuumed copper tube with sealing pliers, then cut off the copper tube, and seal it with silver soldering. When sealing the silver soldering, wrap the upper joint (2) with a wet towel to avoid damage to the silicone pad due to excessive temperature . the

The pressurized solar heat collector implemented in this implementation is used as the heating equipment of the building's central hot water system. Multiple heat collectors are installed in parallel on the sunny wall on the top floor, and the water outlets of the heat collectors are connected to the indoor through thermal insulation pipes. The hot water inlet in the middle of the thermal insulation water tank, the water inlet of the heat collector is connected to the circulating water outlet at the bottom of the indoor thermal insulation water tank through the thermal insulation pipe, the collector absorbs the solar radiation energy, and circulates the water in the thermal insulation water tank for heating, hot water supply For people's daily life. the

Claims (6)

1. A pressurized solar heat collector, characterized in that the heat collector is mainly composed of an upper joint (2), a heat collection assembly, a glass tube (7), a lower joint (18) and a hollow screw (23), wherein : the upper joint (2) has a water outlet (1), an upper socket, a water collection channel (28) and a central through hole a; The end (6) is composed of a water diversion through hole (20) and a central through hole c on the water diversion end (11), and a water collection through hole (26) and a central through hole b on the water collection end (6). , there is a heat collecting cavity (22) in the heat collecting tube (10), and the two ends of the heat collecting tube (10) are respectively connected to the water distribution through hole (20) and the water collecting through hole (26); the inner space of the glass tube (7) A vacuum chamber (9) is formed; the lower joint (18) has a water inlet (16), a lower socket, a water diversion channel (17) and a central through hole d; the heat collecting tube (10) is arranged in the vacuum chamber (9), The water diversion terminal (11) and the water collection terminal (6) form the heads at both ends of the vacuum chamber (9) respectively, and the upper socket of the upper joint (2) is sleeved on one end of the glass tube (7) and the water collection terminal (6) The lower sockets of the upper and lower joints (18) are set on the other end of the glass tube (7) and the water diversion end (11); the hollow screw (23) is a fastener, and the hollow screw (23) is in turn Pass through the central through hole a of the upper joint (2), the central through hole b of the water collection terminal (6), the vacuum chamber (9), the central through hole c of the water diversion terminal (11), the lower joint (18) through hole d in the center, use the upper fastening nut (3) and the lower fastening nut (14) to fasten the upper joint (2), the heat collecting assembly, the glass tube (7) and the lower joint (18) into one; The water inlet (16) of the joint (18) is connected to the heat collecting chamber (22) in the heat collecting tube (10) through the water diversion channel (17) and the water diversion through hole (20) in turn, and the heat collecting chamber (22) passes through the The water collecting through hole (26) and the water collecting channel (28) are connected to the water outlet (1) of the upper joint (2). 2. A pressurized solar heat collector according to claim 1, characterized in that there is a vacuum interface (4) on the upper joint (2), and a vacuum channel on the water collection terminal (6) (5), the vacuum port (4) is connected to the vacuum channel (5), the vacuum channel (5) is connected to the vacuum chamber (9), and the vacuum port (4) is connected by a vacuum copper tube. 3. A pressurized solar heat collector according to claim 1, characterized in that the heat collecting tubes (10) are at least two, and the water diversion through holes (20) on the water diversion end (11) ) quantity and the quantity of the water-collecting through-holes (26) on the water-collecting end (6) correspond to the quantity of the heat-collecting tubes (10). 4. A pressurized solar heat collector according to claim 1, characterized in that there is a reflective film (8) inside the glass tube (7), and the reflective film (8) covers the semicircular surface of 180° superior. 5. A pressurized solar heat collector according to claim 1, characterized in that between the glass tube (7) and the upper joint (2), between the glass tube (7) and the lower joint (18) 1. There are silica gel pads between the upper joint (2) and the water collecting end (6), between the lower joint (18) and the water diversion end (11), and the silica gel pads are used as sealing elements and elastic elements at the same time. 6. A pressurized solar collector according to claim 1, characterized in that there is a cooling chamber (24) inside the hollow screw (23), and the inlet of the cooling chamber (24) is connected to the water inlet (16), The outlet of the cooling chamber (24) is connected to the water outlet (1).

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