CN210718139U - Flat plate type solar heat collector - Google Patents

Abstract

The utility model provides a flat-plate solar heat collector, which comprises a casing, a core plate and a glass cover plate installed in the casing, the casing is composed of a frame and a back plate, and is installed between the back plate and the core plate There is a thermal insulation layer, the core board includes two main flow channel pipes, a number of flow channel branch pipes are connected between the two main flow channel main pipes, and flanged quick connection joints are installed at the inlet and outlet; A protection device for absorbing thermal expansion and cold contraction of the flow channel branch pipe is arranged between the main pipe and the casing frame respectively. The utility model has reasonable design, simple installation and high heat collector efficiency. It is mainly used for hot water at medium temperature by solar energy, especially suitable for large-scale solar heating system. In the case of large-scale system installation, the installation speed is fast and the system efficiency is high, which can meet the series and parallel installation of multiple sets of collectors.

Description

A flat-plate solar collector

technical field

The utility model relates to the technical field of solar heating, in particular to a flat-plate solar heat collector.

Background technique

At present, in the case of decreasing fossil fuels, solar energy has become an important part of the energy used by human beings, and it has been continuously developed. The collector is a key component of the solar energy system, and there are mainly two types of solar collectors, vacuum tube and flat plate. With the development of medium-temperature markets such as solar heating, the demand for flat-panel collectors has gradually increased, but traditional flat-panel collectors are only suitable for low-temperature hot water use, not suitable for heating systems, especially large-scale engineering installations.

The existing large flat plate collectors on the market have the following disadvantages:

1. The inlet and outlet joints of traditional solar collectors are divided into thread seals, plane seals and ferrule seals. When the thread seal is used in medium and high temperature applications, a high temperature sealing medium must be used, the installation is complicated and it is generally difficult to disassemble after installation. The flat gasket seal has high requirements on the verticality of the collector and the connecting pipe head. When the collector or the connecting pipe head is stressed, it is easy to cause the two to not fit tightly, and it is easy to cause leakage. The ferrule seal has strict requirements on the concentricity of the collector tube head, but it is easy to cause the tube head to be out of round during the production and transportation of the collector, resulting in failure to seal. At the same time, no matter which of the above seals is used, since the inlet and outlet of the collector will be subjected to the tightening rotational force when tightening, the rotational freedom of the inlet and outlet of the collector must be limited, otherwise the flow channel will be easily deformed;

2. The cavity between the glass cover plate and the core of the collector is filled with air. When the collector is heated or cooled, the air in the cavity will expand or contract, so generally the collector will be equipped with an exhaust device . Some collectors exhaust through their own gaps, but this method may cause rainwater leakage; some are equipped with exhaust devices on the back panel, but generally, the collectors are equipped with thick insulation cotton on the back and open holes. Or the installation of the exhaust device is more complicated and may cause damage to the insulation cotton; some are to install the exhaust device on the side of the frame or install the exhaust device on the upper part, but in order to reduce heat loss, the exhaust is generally exhausted by small holes. When the collector is under high irradiation or high efficiency conditions, a single exhaust gas volume is insufficient;

3. The collectors on the market usually use the heat-absorbing plate to absorb the heat, and then transfer the heat to the branch pipe to heat the working medium flowing through the plate and take the heat away. Usually, the diameter of the main pipe of the collector is much larger than that of the branch pipe, so it is difficult to connect the heat absorption plate to the main pipe, so the heat absorption plate only transfers heat to the branch pipe, but not directly to the main pipe. As a result, the core of the collector plate cannot be fully utilized. In order to achieve this effect, some collectors adopt a more complex structure, resulting in a higher price of the collector;

4. When the collector is used in medium and high temperature applications, the temperature changes greatly, especially for large-scale collectors. Because the plate core itself is long, the plate core has a large deformation length due to thermal expansion and cooling contraction, and the plate core has no space to collect heat. The inside of the device shrinks freely, resulting in the long-term repeated compression or tension of the upper branch pipe on the core, resulting in fatigue fracture.

SUMMARY OF THE INVENTION

The technical problem to be solved by the utility model is aimed at the deficiencies of the prior art, and provides a flat-panel solar energy that can greatly shorten the installation time and is easy to install when a large-scale system is installed, and can solve the problems of large heat loss and thermal expansion at the same time. The specific scheme of the collector is as follows:

The utility model relates to a flat-plate solar heat collector, which comprises a casing, a core plate and a glass cover plate installed in the casing, the casing is composed of a frame and a back plate, and between the back plate and the core plate is installed a Insulation layer, the core plate includes two main flow channel pipes and a heat absorbing plate, a plurality of flow channel branch pipes are connected between the two flow channel main pipes, and the flow channel branch pipes are respectively connected with the two flow channel main pipes. A protection device for absorbing the thermal expansion and contraction of the flow channel branch pipe is provided between the two main flow channel main pipes and the casing frame respectively. Flange type quick connection joints are installed at the inlet and outlet of the main flow channel main pipe. There are exhaust holes on the left and right sides, and exhaust valves are installed at the exhaust holes; the heat absorption plate is laid on the surface of the flow channel branch pipe, and the two sides of the heat absorption plate extend to the flow channel main pipe respectively and are connected with the flow channel main pipe. Surface fit of runner mains.

The technical problem to be solved by the present invention can be further achieved by the following technical solutions, the flanged quick connection joint includes a sealing assembly and a clamp assembly for avoiding displacement of the sealing assembly, the sealing assembly is composed of an inner ring, an outer ring and an outer ring. It consists of a ring and a sealing ring installed between the inner and outer rings. The inner ring of the sealing assembly is respectively provided with a positioning edge that is connected with the main pipe of the flow channel and the external pipe, and the inner ring of the inner ring is provided with a positioning sealing ring in the middle of the outer wall of the inner ring. Ring positioning groove, the inner ring of the outer ring is provided with an outer ring pressure groove to prevent the displacement of the sealing ring.

The technical problem to be solved by the present invention can be further realized by the following technical solutions, wherein the protection device is an oval hole or a quasi-oval hole opened on the frame to cooperate with the main pipe of the flow channel.

The technical problem to be solved by the present invention can be further achieved by the following technical solutions, an elastic sealing member is installed between the oval hole and the frame to ensure that rainwater does not flow in.

The technical problem to be solved by the present utility model can be further realized by the following technical solutions, a clip for fixing the heat absorbing plate outside the main pipe of the flow channel is provided outside the heat-absorbing plate at the main pipe of the flow channel.

The technical problem to be solved by the present invention can also be further achieved by the following technical solutions, wherein the thermal insulation layer is composed of several overlapping thermal insulation cottons.

Compared with the prior art, the beneficial effects of the utility model are: reasonable design, simple installation, mainly used for the use of solar energy medium-temperature hot water, especially suitable for large-scale solar heating systems, when the large-scale system is installed, it can be The installation time is greatly shortened, and the problems of large heat loss and thermal expansion are solved at the same time.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts.

Fig. 1 is a kind of structural representation of the utility model;

Fig. 2 is the structural representation of the core board;

Fig. 3 is the structural representation of the thermal insulation layer;

Figure 4 is a schematic structural diagram of a flanged quick-connect joint;

5 is a schematic structural diagram of a protection device;

6 is a schematic structural diagram of another embodiment of the protection device;

FIG. 7 is a schematic structural diagram of an elastic seal.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

As shown in Figures 1, 2, 3, 4, 5, 6, and 7, a flat-panel solar collector provided in this embodiment includes a casing, a core plate and a glass cover plate 5 installed in the casing. The shell is composed of a frame 7 and a back plate 1, and an insulating layer 2 is installed between the back plate 1 and the core plate. The core plate includes two main flow channels 6 and a heat absorbing plate 9. A number of flow channel branch pipes 3 are connected between 6, and the flow channel branch pipes 3 are respectively communicated with two flow channel main pipes 6. It is characterized in that: an absorption flow channel is provided between the two flow channel main pipes 6 and the casing frame 7 respectively. The protection device 14 for thermal expansion and contraction of the branch pipe 3 is provided with flanged quick connection joints at the inlet and outlet of the main pipe 6 of the flow channel, and exhaust holes are opened on the upper and lower sides of the frame 7 and on the left and right sides. Exhaust valves 4 are installed at the holes; the heat absorption plate 9 is laid on the surface of the flow channel branch pipe 3 , and the two sides of the heat absorption plate 9 extend toward the flow channel main pipe 6 respectively and fit with the surface of the flow channel main pipe 6 .

The flanged quick-connect joint includes a seal assembly 11 and a clamp assembly 12 to prevent the seal assembly 11 from being displaced. The seal assembly is composed of an inner ring, an outer ring and a sealing ring installed between the inner and outer rings. The inner ring of the inner ring is respectively provided with a positioning edge for docking with the collector pipe 10 and the external pipe 13, the inner ring sealing ring positioning groove for positioning the sealing ring is arranged in the middle of the outer wall of the inner ring, and the inner ring of the outer ring is provided with a The outer ring pressure groove where the sealing ring is displaced. The protection device is an oval hole 14 opened on the frame to cooperate with the main pipe of the flow channel; another embodiment of the protection device can also install an elastic seal 15 between the oval hole 14 and the frame to ensure that rainwater does not flow in. . The inner ring sealing ring positioning groove is an arc-shaped positioning groove that cooperates with the sealing ring and is concave inward along the radial direction of the inner ring; the outer ring pressure groove is an arc-shaped pressure groove that cooperates with the sealing ring and is concave inward along the outer ring radial direction. groove.

The clamp assembly 12 includes two semi-annular left and right clamp bodies. The inner ring surfaces of the left and right clamp bodies are provided with outer ring positioning grooves that cooperate with the outer ring of the sealing assembly. One end of the left and right clamp bodies is set as the locking end, and the other ends of the left and right clamp bodies are set as the connecting end, the connecting ends are connected together by a pin shaft, and the axial direction of the pin shaft is connected with the clamp The axial directions of the bodies are arranged in parallel, and the locking ends of the left and right clamp bodies are connected together by a locking mechanism. The locking mechanism includes two left and right butt plates arranged at the connecting ends of the left and right clamp bodies, and a bolt rod is hinged on one of the butt plates through a hinge shaft, and the axial direction of the hinge shaft is connected to the pin shaft. The axial direction is parallel, the other butt plate is provided with an opening through which the bolt rod passes, and the bolt rod is provided with a locking nut. The external pipeline has end face flanges, which can be brass, stainless steel, carbon steel and other metal or non-metallic materials. When connecting the inlet and outlet of the collector to the external pipeline, the clamp assembly only needs to tighten the clamp, and the collector and The external pipe only bears the tension force when tightening, not the rotation force, the inlet and outlet of the collector do not need special design, and the structure is simple. At the same time, the equipment can withstand high temperature and high pressure, can meet the application of medium and high temperature, and is suitable for the installation and application of large-scale collector systems.

The exhaust valve 4 used in the present invention is arranged on the left and right sides and the upper side at the same time, and two exhaust valves are respectively arranged on the upper side and the lower side, and one exhaust valve is respectively arranged on the left side and the right side. It not only ensures the exhaust effect, but also minimizes the heat loss caused by exhaust. A clip 8 for fixing the heat absorbing plate outside the main pipe of the flow channel is provided outside the heat-absorbing plate at the main pipe of the flow channel. The clip 8 is a spring clip. The spring clip ensures full contact between the heat absorbing plate and the main channel of the flow channel. Through the special spring clip, the end of the heat absorption plate is pressed to the main channel of the flow channel, and more heat is transferred to the main channel of the flow channel. In the flow channel, the system efficiency is improved.

The thermal insulation layer is composed of several overlapping thermal insulation cottons. For large-scale collectors, the thermal insulation materials are generally spliced, but there is a thermal bridge at the splicing, which increases the heat loss of the collector. The utility model adopts the way of lap joint, which eliminates the thermal bridge to the greatest extent and reduces the heat loss of the collector. In addition, only two types of thermal insulation materials are needed to realize the overlapping of multiple groups of thermal insulation materials, thereby reducing production types. At the same time, one side of the insulation material adopts a semi-circular design. Make sure that after the runner is placed in the insulation material, the main pipe and the branch pipe of the runner are on the same plane to prevent deformation.

Claims (6)

1. The utility model provides a flat plate solar collector, includes the casing, installs core and glass apron (5) in the casing, the casing comprises frame (7) and backplate (1), installs heat preservation (2) between backplate (1) and core, the core includes that two runners are responsible for (6) and absorber plate (9), is connected with a plurality of runner branch pipes (3) between two runner are responsible for (6), and runner branch pipe (3) are responsible for (6) intercommunication, its characterized in that with two runners respectively: a protection device (14) for absorbing expansion and contraction of the runner branch pipes (3) is arranged between each of the two runner main pipes (6) and the shell frame (7), flange type quick connecting joints are respectively arranged at the inlet and outlet of each runner main pipe (6), vent holes are respectively formed in the upper side, the lower side, the left side and the right side of each frame (7), and vent valves (4) are respectively arranged at the vent holes; the heat absorption plates (9) are laid on the surfaces of the flow channel branch pipes (3), and two sides of each heat absorption plate (9) extend towards the flow channel main pipe (6) and are attached to the surfaces of the flow channel main pipes (6).

2. A flat panel solar collector according to claim 1, wherein: flange formula quick connect coupling includes seal assembly (11) and clamp subassembly (12) of avoiding seal assembly (11) to take place the displacement, seal assembly (11) comprises inner ring, outer loop and the sealing washer of installing between the inner and outer loop, is equipped with respectively on the inner ring of seal assembly (11) and is responsible for (6), the location edge of external pipeline butt joint with the runner, is equipped with the inner ring sealing washer constant head tank of location sealing washer in the outer wall middle part of inner ring, is equipped with the outer loop indent of avoiding the sealing washer to take place the displacement in the inner circle of outer loop.

3. A flat panel solar collector according to claim 1, wherein: the protection device (14) is an elliptical hole or an elliptical hole which is formed in the frame and matched with the flow channel main pipe.

4. The flat plate type solar thermal collector according to claim 3, wherein: an elastic sealing element (15) which ensures that rainwater does not flow in is arranged between the elliptical hole and the frame.

5. A flat panel solar collector according to claim 1, wherein: a clip (8) for fixing the heat absorbing plate outside the main flow channel pipe is arranged outside the heat absorbing plate at the main flow channel pipe.

6. A flat panel solar collector according to claim 1, wherein: the heat-insulating layer (2) is composed of a plurality of heat-insulating cotton which are mutually lapped.

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