Multifunctional ventilation device based on phase change material

Abstract

The utility model relates to the technical field of building ventilation devices, in particular to a multifunctional ventilation device based on phase-change materials, which comprises a heat collecting pipe group, the lower end of the heat collecting pipe group is connected with an air inlet pipe, the upper end of the heat collecting pipe group is connected with an air outlet pipe, the heat collecting pipe group is fixedly mounted in an unshielded area, and the air inlet pipe is communicated with an indoor space; the heat collection pipe set comprises a row of solar heat collection pipes, phase change heat storage units are densely arranged on the circumferential inner walls of the solar heat collection pipes, the phase change heat storage units are of hollow box structures, and cavities in the phase change heat storage units are filled with solid-liquid conversion phase change materials. The problems that a traditional ventilation device is high in energy consumption, not environmentally friendly and the like are effectively solved, and a new solution is provided for sustainable development of the building industry.

Description

Technical Field

[0001] The utility model relates to the technical field of building ventilation devices, in particular to a multifunctional ventilation device based on phase change materials. Background Art

[0002] With the rapid development of the construction industry and the increasing demand for a better living environment, building ventilation has become an indispensable component. However, traditional building ventilation systems, such as exhaust fans and exhaust fans, mostly rely on electricity. While these devices provide ventilation, they also lead to significant energy consumption issues, increasing living costs and negatively impacting the environment.

[0003] With increasingly severe energy challenges and a growing awareness of sustainable development, the market demand for new energy-efficient ventilation devices is growing. These devices must be highly efficient, energy-efficient, and environmentally friendly, meeting ventilation needs while reducing energy consumption and environmental pollution. However, while some existing high-end ventilation devices utilize advanced energy-saving technologies, they are expensive and difficult to popularize.

[0004] Therefore, there is an urgent need for a new multifunctional ventilation device based on phase change materials to provide an effective solution to the defects of existing technologies. Utility Model Content

[0005] The purpose of the present utility model is to provide a multifunctional ventilation device based on phase change material to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A multifunctional ventilation device based on phase change material, comprising a heat collecting tube group, wherein the lower end of the heat collecting tube group is connected to an air inlet pipe, and the upper end of the heat collecting tube group is connected to an air outlet pipe. The heat collecting tube group is fixedly installed in an unobstructed area, and the air inlet pipe is connected to an indoor space;

[0008] The heat collection tube group includes a row of solar heat collection tubes, and phase change heat storage units are densely arranged on the circumferential inner wall of the solar heat collection tube. The phase change heat storage unit is a boxed structure with a hollow interior, and the cavity inside the phase change heat storage unit is filled with solid-liquid conversion phase change material.

[0009] Furthermore, an isolation ring net is fixedly installed inside the solar heat collecting tube, the isolation ring net is close to the circumferential inner wall of the solar heat collecting tube and a gap is left, and the phase change heat storage unit is installed on the isolation ring net.

[0010] Furthermore, the heat collecting tube group is fixedly installed by a bracket, and the bracket includes more than two groups of row positioning rings. The solar heat collecting tubes are inserted into the row positioning rings. The outer side of the row positioning rings is fixedly connected with a beam. The upper and lower beams are fixedly connected by columns. The bottom beams and columns are connected to the fixed base through oblique support rods.

[0011] Furthermore, a guide cover is provided at both upper and lower ends of the row of solar heat collecting tubes, and the guide cover is used to connect to the air inlet pipe or the air outlet pipe.

[0012] Furthermore, a protective cover is fixedly connected to the top of the air outlet pipe through a connecting rod, and the protective cover has a conical shape.

[0013] Furthermore, the air outlet pipe is connected to the indoor environment through a branch pipe, and the air inlet pipe is connected to the external environment through a branch pipe.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. When solar radiation shines on the solar heat collecting tube, its internal temperature rises, thereby heating the solid-liquid conversion phase change material in the phase change heat storage unit. In the process of absorbing heat, the phase change material gradually changes from solid to liquid, and stores a large amount of thermal energy in the process. This process not only improves the utilization efficiency of thermal energy, but also enables the heat collecting tube group to continue to release stored heat when there is no sunlight. As the temperature inside the solar heat collecting tube rises, a significant temperature difference is formed between it and the indoor temperature. This temperature difference becomes the power source for driving air convection. Indoor air is sucked into the heat collecting tube group through the air inlet pipe. After being heated, the density of the air decreases, it naturally rises, and is discharged to the outside through the air outlet pipe. At the same time, the cold air at a lower position outdoors or indoors will naturally be replenished into the air inlet pipe due to its higher density, forming a continuous air convection cycle. The utility model effectively solves the problems of high energy consumption and environmental pollution of traditional ventilation devices, and provides a new solution for the sustainable development of the construction industry.

[0016] 2. In this utility model, the spacer mesh is tightly fixed inside the solar collector tube. This gap facilitates the circulation of hot air within the tube, while ensuring that the phase-change thermal storage unit evenly receives and stores solar heat. The spacer mesh also enhances the stability of the internal structure of the tube, preventing the phase-change thermal storage unit from deforming or falling off at high temperatures.

[0017] 3. In the present invention, when the indoor temperature needs to be increased in winter, the outlet duct port is closed and connected to the indoor environment through a branch pipe, and the inlet duct is closed and connected to the external environment through a branch pipe. At this time, the solar heat collecting tube flows the heated air into the room, which can achieve a certain heating function. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a multifunctional ventilation device based on phase change materials;

[0019] Figure 2 is a schematic diagram of the structure of the bracket;

[0020] Figure 3 Schematic diagram of the structure of the heat collecting tube group;

[0021] Figure 4 Schematic diagram of the structure of solar heat collecting tube;

[0022] Figure 5 This is a schematic diagram of the structural decomposition of the solar heat collecting tube;

[0023] Figure 6 Schematic diagram of the structure of the phase change heat storage unit.

[0024] In the figure: 1. bracket; 2. row positioning ring; 3. crossbeam; 4. column; 5. oblique support rod; 6. fixed base; 7. heat collecting tube group; 8. solar heat collecting tube; 9. isolation ring net; 10. phase change heat storage unit; 11. cavity; 12. air inlet pipe; 13. deflector cover; 14. air outlet pipe; 15. protective cover. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1: Please refer to Figures 1 to 6 A multifunctional ventilation device based on phase change material includes a heat collecting tube group 7, the lower end of the heat collecting tube group 7 is connected to the air inlet pipe 12, the upper end of the heat collecting tube group 7 is connected to the air outlet pipe 14, the heat collecting tube group 7 is fixedly installed in an unobstructed area, and the air inlet pipe 12 is connected to the indoor space;

[0027] The heat collecting tube group 7 includes a row of solar heat collecting tubes 8, and phase change heat storage units 10 are densely arranged on the circumferential inner wall of the solar heat collecting tubes 8. The phase change heat storage unit 10 is a box-shaped structure with a hollow interior, and the cavity 11 inside the phase change heat storage unit 10 is filled with solid-liquid conversion phase change material.

[0028] Working principle of this embodiment:

[0029] Solar thermal collection: The solar thermal tubes 8 in the thermal tube assembly 7 are fixedly installed in an unobstructed area, such as a building's roof or exterior wall, to maximize solar radiation reception. Phase change thermal storage units 10, densely arranged on the circumferential inner wall of the solar thermal tubes 8, serve as thermal energy receivers and storage units. When solar radiation strikes the solar thermal tubes 8, their internal temperature rises, heating the solid-liquid phase change material within the phase change thermal storage units 10. As the phase change material absorbs heat, it gradually transforms from solid to liquid, storing a significant amount of thermal energy in the process. This process not only improves thermal energy utilization efficiency but also enables the thermal tube assembly 7 to continue releasing stored heat even when sunlight is absent. As the internal temperature of the solar thermal tubes 8 rises, a significant temperature difference forms between it and the indoor temperature. This temperature difference drives air convection. Indoor air is drawn into the thermal tube assembly 7 through the air inlet duct 12. The heated air's density decreases, causing it to naturally rise and be discharged outdoors through the air outlet duct 14. At the same time, the cold air at the outdoor or lower position indoors will naturally be replenished into the air inlet pipe 12 due to its high density, forming a continuous air convection cycle.

[0030] This embodiment utilizes solar energy, a renewable energy source, to provide ventilation while consuming virtually no electricity. This significantly reduces energy consumption and living costs, reduces reliance on traditional electricity, and reduces greenhouse gas emissions from power generation. This embodiment effectively addresses the high energy consumption and environmental concerns of traditional ventilation systems, providing a new solution for sustainable development in the construction industry.

[0031] Example 2: Please refer to Figures 4-5 A multifunctional ventilation device based on phase change material is different from Example 1 in that an isolation ring net 9 is fixedly installed inside the solar heat collecting tube 8, the isolation ring net 9 is close to the inner wall of the solar heat collecting tube 8 and a gap is left, and the phase change heat storage unit 10 is installed on the isolation ring net 9.

[0032] In this embodiment, the isolation ring mesh 9 is tightly fixed inside the solar collector tube 8, close to the inner circumference but with an appropriate gap, providing a stable support platform for the phase-change thermal storage unit 10. This gap facilitates the circulation of hot air within the collector tube, while ensuring that the phase-change thermal storage unit 10 can evenly receive and store solar heat. The isolation ring mesh 9 also enhances the stability of the internal structure of the collector tube, preventing the phase-change thermal storage unit 10 from deforming or falling off at high temperatures.

[0033] Example 3: Please refer to Figure 2A multifunctional ventilation device based on phase change material is different from Example 1 in that the heat collecting tube group 7 is fixedly installed by a bracket 1, the bracket 1 includes two or more sets of row positioning rings 2, the solar heat collecting tubes 8 are inserted into the row positioning rings 2, and the row positioning rings 2 are fixedly connected with beams 3 on the outside. The upper and lower beams 3 are fixedly connected by columns 4, and the bottom beams 3 and columns 4 are connected to the fixed base 6 through oblique support rods 5.

[0034] In this embodiment, the bracket 1 is used to fix the heat collecting tube group 7 and to fix it in a corresponding position. During installation, the fixing base 6 is fixedly connected to a fixed object such as the ground or floor by bolts.

[0035] Example 4: Please refer to Figure 3 A multifunctional ventilation device based on phase change material is different from Example 1 in that a guide cover 13 is provided at the upper and lower ends of a row of solar heat collecting tubes 8, and the guide cover 13 is used to connect the air inlet pipe 12 or the air outlet pipe 14.

[0036] In this embodiment, the air deflector 13 is used to reduce the wind resistance of air flowing in the pipeline and improve the working efficiency of the device.

[0037] Example 5: Please refer to Figure 1 and 3 , a multifunctional ventilation device based on phase change material, which differs from Example 1 in that a protective cover 15 is fixedly connected to the top of the air outlet pipe 14 through a connecting rod, and the protective cover 15 has a conical shape.

[0038] In this embodiment, the protective cover 15 protects the opening of the air outlet pipe 14 to prevent debris from falling in and causing blockage.

[0039] Example 6: Please refer to Figures 1 to 6 , a multifunctional ventilation device based on phase change material, which differs from Example 1 in that the air outlet pipe 14 is connected to the room through a branch pipe, and the air inlet pipe 12 is connected to the external environment through a branch pipe.

[0040] In this embodiment, when the indoor temperature needs to be increased in winter, the outlet pipe 14 port is closed and connected to the indoor environment through a branch pipe, and the inlet pipe 12 is closed and connected to the external environment through a branch pipe. At this time, the solar heat collecting tube 8 will flow the heated air into the room, which can achieve a certain heating function.

Claims

1. A multifunctional ventilation device based on phase change material, comprising a heat collecting tube group (7), characterized in that: The lower end of the heat collecting tube group (7) is connected to the air inlet pipe (12), and the upper end of the heat collecting tube group (7) is connected to the air outlet pipe (14). The heat collecting tube group (7) is fixedly installed in an unobstructed area, and the air inlet pipe (12) is connected to the indoor space. The heat collecting tube group (7) comprises a row of solar heat collecting tubes (8), and phase change heat storage units (10) are densely arranged on the circumferential inner wall of the solar heat collecting tube (8). The phase change heat storage unit (10) is a boxed structure with a hollow interior, and the cavity (11) inside the phase change heat storage unit (10) is filled with a solid-liquid conversion phase change material.

2. The multifunctional ventilation device based on phase change material according to claim 1, characterized in that: An isolation ring net (9) is fixedly installed inside the solar heat collecting tube (8), the isolation ring net (9) is close to the circumferential inner wall of the solar heat collecting tube (8) and a gap is left, and the phase change heat storage unit (10) is installed on the isolation ring net (9).

3. The multifunctional ventilation device based on phase change material according to claim 1, characterized in that: The heat collecting tube group (7) is fixedly installed by a bracket (1), and the bracket (1) includes two or more sets of parallel positioning rings (2). The solar heat collecting tubes (8) are inserted into the parallel positioning rings (2). The outer sides of the parallel positioning rings (2) are fixedly connected with cross beams (3). The upper and lower cross beams (3) are fixedly connected by columns (4). The bottom cross beam (3) and the column (4) are connected to the fixed base (6) by oblique support rods (5).

4. The multifunctional ventilation device based on phase change material according to claim 1, characterized in that: A guide cover (13) is provided at both the upper and lower ends of the row of solar heat collecting tubes (8), and the guide cover (13) is used to connect to an air inlet pipe (12) or an air outlet pipe (14).

5. The multifunctional ventilation device based on phase change material according to claim 1, characterized in that: A protective cover (15) is fixedly connected to the top of the air outlet pipe (14) via a connecting rod, and the protective cover (15) has a conical shape.

6. The multifunctional ventilation device based on phase change material according to claim 1, characterized in that: The air outlet pipe (14) is connected to the room via a branch pipe, and the air inlet pipe (12) is connected to the external environment via a branch pipe.

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