A multi-layer composite heat insulation structure of a photovoltaic system for a sandwich color steel plate roof

Abstract

The utility model relates to solar photovoltaic building technology field, specifically disclose a kind of for sandwich color steel sheet roof's photovoltaic system multilayer composite heat insulation structure, including rock wool sandwich color steel sheet layer, the upper surface of rock wool sandwich color steel sheet layer is sequentially provided with top cavity heat insulation layer from below to above, the top cavity heat insulation layer includes the support frame fixedly connected on the upper end surface of rock wool sandwich color steel sheet layer, the upper end surface of the support frame is provided with solar photovoltaic panel, provide excellent comprehensive heat insulation performance, can effectively block the heat generated by photovoltaic system to building indoor transmission, to reduce summer air conditioning refrigeration energy consumption significantly in addition to power generation, improve space comfort and personnel work efficiency;The structure is stable and reliable, convenient to install, make full use of original roof structure, new load is small, and form protection to original roof structure, reduce the risk of material aging and deformation due to temperature stress, prolong the service life of building.

Description

Technical Field

[0001] This utility model relates to the field of solar photovoltaic building technology, and specifically discloses a multi-layer composite thermal insulation structure for a photovoltaic system used in sandwich color steel plate roofs. Background Technology

[0002] Installing photovoltaic systems directly on the roofs of industrial plants is a common way to achieve energy conservation and emission reduction. These buildings generally use rock wool sandwich panels as the roof cladding, which inherently possesses certain thermal insulation properties. Currently, the industry commonly uses metal brackets to fix solar photovoltaic panels to the corrugated steel roof, aiming to fully utilize unused roof space for power generation.

[0003] This traditional direct installation method has significant drawbacks. During operation, photovoltaic panels generate a large amount of waste heat, causing their own temperature to rise rapidly. This heat is easily conducted to the roof through metal components such as the support structure and continues to radiate into the indoor environment, resulting in a significant increase in indoor temperature. This not only greatly increases the energy consumption for building cooling, partially offsetting the energy-saving benefits of photovoltaic power generation, but also worsens the comfort of the indoor working environment. Simultaneously, the roof panels bear additional heat loads for extended periods, which may adversely affect their durability. Existing conventional solutions mainly focus on cooling the photovoltaic panels to improve their power generation efficiency, but lack efficient and economical overall insulation solutions for systematically preventing heat transfer into the building interior, which urgently needs improvement. Utility Model Content

[0004] This invention proposes a multi-layer composite thermal insulation structure for photovoltaic systems on sandwich corrugated steel roofs, which provides excellent comprehensive thermal insulation performance and can effectively block the heat generated by the photovoltaic system from being transferred to the building interior. This significantly reduces the energy consumption of air conditioning in summer while generating electricity, and improves spatial comfort and work efficiency.

[0005] This utility model is implemented as follows: a multi-layer composite thermal insulation structure for a photovoltaic system with sandwich corrugated steel roofing includes a rock wool sandwich corrugated steel sheet layer, wherein the upper surface of the rock wool sandwich corrugated steel sheet layer is provided with the following sequentially arranged from bottom to top:

[0006] The top cavity insulation layer includes a support frame fixedly connected to the upper surface of the rock wool sandwich color steel plate layer, and a solar photovoltaic panel is provided on the upper surface of the support frame.

[0007] The lower surface of the rock wool sandwich color steel plate layer is provided with the following from top to bottom:

[0008] The bottom insulation board layer is tightly bonded to the lower surface of the rock wool sandwich color steel plate layer;

[0009] The bottom cavity layer is located below the bottom insulation board layer.

[0010] As a preferred embodiment of the multi-layer composite thermal insulation structure for a photovoltaic system with a sandwich color steel roof, the support frame is made of either aluminum alloy or hot-dip galvanized steel, and the height of the support frame is 80-150mm.

[0011] As a preferred embodiment of the multi-layer composite thermal insulation structure for a photovoltaic system with a sandwich color steel plate roof according to this utility model, the bottom insulation board layer is one of extruded polystyrene board and polyurethane insulation board.

[0012] As a preferred embodiment of the multi-layer composite thermal insulation structure for a photovoltaic system with a sandwich color steel roof, the thickness of the bottom insulation layer is 15-30mm.

[0013] As a preferred embodiment of the multi-layer composite thermal insulation structure for a photovoltaic system with a sandwich corrugated steel roof, the bottom insulation layer is fixedly connected to the rock wool sandwich corrugated steel roof layer by adhesive and anchors.

[0014] As a preferred embodiment of the multi-layer composite thermal insulation structure for a photovoltaic system with sandwich color steel plate roof, the bottom cavity layer is an air layer naturally formed on the lower surface of the bottom insulation board layer.

[0015] The beneficial effects of this utility model are:

[0016] This structure offers superior overall thermal insulation performance, effectively blocking the transfer of heat generated by the photovoltaic system into the building interior. This significantly reduces summer air conditioning energy consumption while generating electricity, achieving dual energy-saving benefits of increasing energy supply and reducing energy consumption. It greatly improves the humid and hot environment inside buildings such as factories, eliminates strong heat radiation, and enhances spatial comfort and work efficiency. The structure is stable and reliable, easy to install, makes full use of the original roof structure, adds little new load, and protects the original roof structure, reducing the risk of material aging and deformation caused by temperature stress and extending the building's service life. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a cross-sectional view of the present invention.

[0019] Figure 2 This is a partial cross-sectional structural diagram of the present invention.

[0020] The markings in the diagram are: 1. Rock wool sandwich color steel plate layer; 2. Top cavity insulation layer; 3. Support frame; 4. Solar photovoltaic panel; 5. Bottom insulation board layer; 6. Bottom cavity layer; 7. Anchors. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0022] Please see Figure 1-2 A multi-layer composite thermal insulation structure for a photovoltaic system using sandwich corrugated steel roofing includes a rock wool sandwich corrugated steel layer 1, wherein the upper surface of the rock wool sandwich corrugated steel layer 1 is provided with the following components sequentially from bottom to top:

[0023] The top cavity insulation layer 2 includes a support frame 3 fixedly connected to the upper surface of the rock wool sandwich color steel plate layer 1, and a solar photovoltaic panel 4 is provided on the upper surface of the support frame 3.

[0024] The lower surface of rock wool sandwich color steel plate layer 1 is provided with the following from top to bottom:

[0025] The bottom insulation board layer 5 is tightly bonded to the lower surface of the rock wool sandwich color steel plate layer 1.

[0026] The bottom cavity layer 6 is located below the bottom insulation board layer 5.

[0027] In this embodiment, thermal insulation is achieved by adding functional layers to the upper and lower surfaces of the original rock wool sandwich corrugated steel plate layer 1. Specifically, on the upper surface of the rock wool sandwich corrugated steel plate layer 1, a solar photovoltaic panel 4 is supported by a support frame 3 of a certain height, thereby constructing a top cavity thermal insulation layer 2 between the two. This layer utilizes the principle of low thermal conductivity of air to form the first thermal insulation barrier and dissipates some heat through convection. On the lower surface of the rock wool sandwich corrugated steel plate layer 1, a bottom insulation board layer 5 is tightly attached. This layer is composed of high-efficiency thermal insulation material, which can greatly enhance the thermal resistance of the overall structure and completely block thermal bridges. Finally, a bottom cavity layer 6 is naturally formed or constructed below the bottom insulation board layer 5, which uses air to further increase the total thermal resistance of the system. Thus, through this multi-barrier principle of "cavity-insulation core material-additional insulation layer-cavity", the excellent effect of significantly reducing heat transfer to the room, greatly improving building energy efficiency and indoor environmental comfort is achieved.

[0028] As a technical optimization of this utility model, the support frame 3 is made of either aluminum alloy or hot-dip galvanized steel, and the height of the support frame 3 is 80-150mm.

[0029] In this embodiment, the support frame 3 is made of aluminum alloy or hot-dip galvanized steel to ensure its corrosion resistance and structural strength in outdoor environments. The height of the support frame 3 is 80-150mm. This height ensures that there is enough air layer thickness in the cavity to achieve excellent static heat insulation effect, while not being too high to affect the structural stability, and provides the necessary space channel for heat convection and heat dissipation.

[0030] As a technical optimization of this utility model, the bottom insulation board layer 5 is one of extruded polystyrene board and polyurethane insulation board.

[0031] In this embodiment: the bottom insulation board layer 5 is made of extruded polystyrene board or polyurethane insulation board, which has extremely low thermal conductivity and high compressive strength. The closed pore structure of the material itself effectively blocks the heat flow, and together with the core material of the rock wool sandwich color steel plate layer 1, it forms a composite insulation structure.

[0032] As a technical optimization of this utility model, the thickness of the bottom insulation board layer 5 is 15-30mm.

[0033] In this embodiment, the thickness of the bottom insulation layer 5 is limited to 15-30mm, which has a good heat insulation effect.

[0034] As a technical optimization of this utility model, the bottom insulation board layer 5 is fixedly connected to the rock wool sandwich color steel plate layer 1 by adhesive and anchor 7.

[0035] In this embodiment, the bottom insulation board layer 5 is compositely fixed to the base layer by adhesive and anchor 7, which combines the full adhesion of chemical bonding with the reliable connection of mechanical anchoring, ensuring a long-term stable bond between the bottom insulation board layer 5 and the main structure.

[0036] As a technical optimization of this utility model, the bottom cavity layer 6 is an air layer naturally formed on the lower surface of the bottom insulation board layer 5.

[0037] In this embodiment: the bottom cavity layer 6 is an air layer naturally formed on the lower surface of the bottom insulation board layer 5. If a suspended ceiling is required, a keel and a ceiling board (such as gypsum board or metal panel) can be installed under the insulation board to naturally form the bottom cavity layer 6. If no suspended ceiling is installed, the lower surface of the bottom insulation board layer 5 is in contact with the indoor air, which can also achieve excellent insulation effect.

[0038] The working principle and usage process of this utility model are as follows: The solar photovoltaic panel 4 generates electricity and heat under sunlight. The high temperature on its back side first attempts to transfer the heat downwards through radiation and conduction. The top cavity insulation layer 2 below it acts as the first line of defense. The air in the cavity has poor thermal conductivity, which effectively slows down the heat transfer rate. At the same time, the top cavity insulation layer 2 allows limited air convection, carrying away some of the accumulated heat. The heat that partially penetrates the top cavity insulation layer 2 then reaches the rock wool sandwich color steel plate layer 1. The rock wool fiber structure inside this layer intertwines and locks in a large amount of still air, and the high thermal resistance of the material itself further hinders the downward flow of heat. The residual heat that is not completely blocked continues to be transferred downwards to the tightly fitted bottom insulation board layer 5. This high-efficiency insulation material with a high cost-performance ratio provides the final and most thorough blocking of heat flow through its extremely low thermal conductivity. Finally, the thermal effect generated by all the layers is again affected by the thermal resistance of the air medium at the bottom cavity layer 6, which minimizes the heat that is finally transferred into the room, thereby achieving the goal of systematic heat insulation.

[0039] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A multi-layer composite thermal insulation structure for a photovoltaic system with sandwich corrugated steel roof, comprising a rock wool sandwich corrugated steel layer (1), characterized in that: The upper surface of the rock wool sandwich color steel plate layer (1) is provided with the following from bottom to top: Top cavity insulation layer (2), the top cavity insulation layer (2) includes a support frame (3) fixedly connected to the upper surface of the rock wool sandwich color steel plate layer (1), and the upper surface of the support frame (3) is provided with a solar photovoltaic panel (4). The lower surface of the rock wool sandwich color steel plate layer (1) is provided with the following from top to bottom: Bottom insulation board layer (5), the bottom insulation board layer (5) is closely attached to the lower surface of rock wool sandwich color steel plate layer (1); The bottom cavity layer (6) is located below the bottom insulation board layer (5).

2. The multi-layer composite thermal insulation structure for a photovoltaic system using sandwich corrugated steel roofing as described in claim 1, characterized in that: The support frame (3) is made of either aluminum alloy or hot-dip galvanized steel, and the height of the support frame (3) is 80-150mm.

3. The multi-layer composite thermal insulation structure for a photovoltaic system with sandwich color steel plate roofing according to claim 1, characterized in that: The bottom insulation board layer (5) is one of extruded polystyrene board and polyurethane insulation board.

4. The multi-layer composite thermal insulation structure for a photovoltaic system with sandwich color steel plate roofing according to claim 1, characterized in that: The thickness of the bottom insulation board layer (5) is 15-30mm.

5. A multi-layer composite thermal insulation structure for a photovoltaic system with sandwich corrugated steel roofing according to claim 1, characterized in that: The bottom insulation board layer (5) is fixedly connected to the rock wool sandwich color steel plate layer (1) by adhesive and anchors (7).

6. The multi-layer composite thermal insulation structure for a photovoltaic system with sandwich color steel plate roofing according to claim 1, characterized in that: The bottom cavity layer (6) is an air layer that is naturally formed on the lower surface of the bottom insulation board layer (5).

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