A natural ventilation cooling device using phase change materials and multi-directional wind towers

Abstract

The utility model discloses a natural ventilation and cooling device using phase change materials and multi-directional wind towers, including an air induction device, an air exhaust device and a phase change energy storage plate; the air induction device includes an air induction device frame and an air induction device baffle that can be flipped to the inside of the air inlet cavity under the push of external airflow to open the corresponding air inlet; the air exhaust device includes an air exhaust device frame and an air exhaust device baffle that can be flipped to the outside of the exhaust cavity under the push of airflow in the exhaust cavity to open the corresponding air outlet; the phase change energy storage plate is arranged at one end of the air outlet near the air inlet cavity, so that the external airflow entering from the air inlet is blown to the phase change energy storage plate through the air outlet of the air inlet cavity; the air inlet of the exhaust cavity and the air outlet of the air inlet cavity are located on both sides of the phase change energy storage plate. The natural ventilation and cooling device using phase change materials and multi-directional wind towers disclosed by the utility model realizes the combination of multi-directional natural ventilation equipment and phase change materials, so that stable fresh air can be generated to enter the room in any wind direction, ensuring that the fresh air entering the room reaches the indoor comfortable temperature range.

Description

Technical Field

[0001] The utility model relates to the technical field of wind energy utilization, in particular to a natural ventilation and cooling device utilizing phase change materials and multi-directional wind towers. Background Art

[0002] Phase change materials (PCM) are used in buildings to regulate indoor temperature and improve energy efficiency and comfort by utilizing their heat storage and release properties. PCMs achieve temperature control by absorbing or releasing a large amount of latent heat at a specific temperature, which makes them widely used in the construction field. Incorporating PCMs into ventilation systems can achieve air temperature regulation.

[0003] In traditional applications, PCM modules are combined with building structures and built into roofs, walls and floors. Although this can also ensure that the indoor temperature is lowered, the untreated air provided by natural ventilation still exceeds the indoor comfort range, resulting in uneven distribution of indoor ambient temperature, which takes a long time to reach a balanced state. Due to the large demand for natural ventilation in passive buildings, PCM energy saving cannot be combined with natural ventilation to achieve better results. Utility Model Content

[0004] In view of the above problems, the utility model proposes a natural ventilation and cooling device using phase change materials and multi-directional wind towers.

[0005] The technical means adopted by the utility model are as follows:

[0006] A natural ventilation and cooling device using phase change materials and a multi-directional wind tower, comprising an air induction device, an air exhaust device and a phase change energy storage plate;

[0007] The air inducing device comprises an air inducing device frame and an air inducing device baffle;

[0008] An air inlet cavity is provided in the air inlet device frame, and a plurality of air inlets connected to the air inlet cavity are circumferentially arranged on the side wall of the air inlet device frame. A plurality of air inlet device baffles that can only be opened toward the inside of the air inlet cavity are provided on the air inlet device frame, and the air inlet device baffles can be flipped toward the inside of the air inlet cavity to open the corresponding air inlets under the push of the airflow on the windward surface;

[0009] The exhaust device comprises an exhaust device frame and an exhaust device baffle;

[0010] An exhaust cavity is provided in the exhaust device frame, and a plurality of exhaust ports connected to the exhaust cavity are circumferentially provided on the side wall surface of the exhaust device frame. A plurality of exhaust device baffles that can only be opened to the outside of the exhaust cavity are provided on the exhaust device frame. The exhaust device baffles can be flipped to the outside of the exhaust cavity to open the corresponding exhaust ports under the push of the negative pressure on both sides of the exhaust cavity and the leeward side.

[0011] The phase change energy storage plate is arranged at one end of the air outlet close to the air inlet cavity, so that the external airflow entering from the air inlet blows toward the phase change energy storage plate through the air outlet of the air inlet cavity; the air inlet of the exhaust cavity and the air outlet of the air inlet cavity are located on both sides of the phase change energy storage plate.

[0012] Furthermore, the air inducing device and the air exhausting device are coaxially arranged;

[0013] The exhaust device is arranged at the upper end of the air induction device, and the exhaust device also includes an exhaust tube, which passes through the air inlet cavity and is connected to the exhaust cavity at one end, and the other end passes through the phase change energy storage plate to form an air inlet of the exhaust cavity.

[0014] Furthermore, the upper end of the air induction device baffle is hinged to the air induction device frame, and in a free state, the air induction device baffle is buckled on the air inlet to achieve the closure of the air inlet.

[0015] Furthermore, the upper end of the exhaust device baffle is hinged to the exhaust device frame, and in a free state, the exhaust device baffle is buckled on the exhaust port to close the exhaust port.

[0016] Furthermore, the air induction device frame is a column structure with a polygonal cross section, and an air inlet cavity is provided in the column structure;

[0017] The exhaust device frame is a column structure with a polygonal cross section, and an exhaust cavity is arranged in the column structure.

[0018] Furthermore, the side wall of the air induction device frame is provided with two or more layers of air inlets in the circumferential direction, and the air induction device frame is provided with a plurality of air induction device baffles equal to the number of the air inlets;

[0019] The side wall surface of the exhaust device frame is circumferentially provided with two or more layers of exhaust ports, and the exhaust device frame is provided with a plurality of exhaust device baffles equal to the number of the exhaust ports.

[0020] Furthermore, the air induction device and the air exhaust device are fixedly installed on the outside of the roof, the phase change energy storage panel is arranged inside the roof, and an air flow channel is formed between the phase change energy storage panel and the inside of the roof.

[0021] Compared with the prior art, the natural ventilation and cooling device using phase change materials and multi-directional wind towers disclosed in the utility model has the following beneficial effects: the application realizes the combination of multi-directional natural ventilation equipment and PCM materials (phase change materials) by setting up an air induction device, an exhaust device and a phase change energy storage plate, thereby being able to generate stable fresh air into the room in any wind direction, and ensuring that the fresh air entering the room can be processed by PCM to reach the indoor comfortable temperature range. And because the air flow direction inside the ventilation system is not affected by the wind direction, it can ensure that the latent heat of the PCM only acts on the fresh air entering the room, which can effectively improve the overall long-term energy-saving efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the natural ventilation and cooling device using phase change materials and multi-directional wind towers disclosed in the utility model installed on the roof;

[0023] Figure 2 This is a cross-sectional view of the natural ventilation and cooling device using phase change materials and multi-directional wind towers disclosed in the utility model installed on the roof in the first direction, and a view of the side away from the device in the house;

[0024] Figure 3 It is a cross-sectional view of the natural ventilation and cooling device using phase change materials and multi-directional wind towers disclosed in the utility model installed on the roof in the second direction, and is a cross-sectional view through the axis of the wind induction device;

[0025] In the figure: 1. induced draft device; 10. induced draft device frame; 11. induced draft device baffle; 12. air inlet cavity; 13. air inlet; 14. air outlet; 2. exhaust device; 20. exhaust device frame; 21. exhaust device baffle; 22. exhaust cavity; 23. air outlet; 24. air inlet; 25. exhaust duct; 3. phase change energy storage panel; 4. roof; 40. air flow channel. DETAILED DESCRIPTION

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, the natural ventilation and cooling device using phase change materials and multi-directional wind towers disclosed in the utility model includes an air induction device 1, an air exhaust device 2 and a phase change energy storage plate 3;

[0027] The air induction device 1 comprises an air induction device frame 10 and an air induction device baffle 11;

[0028] An air inlet cavity 12 is provided in the air inlet device frame 10, and a plurality of air inlets 13 in communication with the air inlet cavity 12 are circumferentially arranged on the side wall of the air inlet device frame 10. A plurality of air inlet device baffles 11 that can only be opened toward the inside of the air inlet cavity 12 are provided on the air inlet device frame 10. The air inlet device baffles 11 can be flipped toward the inside of the air inlet cavity 12 to open the corresponding air inlet 13 under the push of the airflow on the windward surface.

[0029] The exhaust device 2 includes an exhaust device frame 20 and an exhaust device baffle 21;

[0030] An exhaust cavity 22 is provided in the exhaust device frame 20, and a plurality of exhaust ports 23 in communication with the exhaust cavity 22 are circumferentially arranged on the side wall surface of the exhaust device frame 20. A plurality of exhaust device baffles 21 that can only be opened to the outside of the exhaust cavity 22 are provided on the exhaust device frame 20. The exhaust device baffles 21 can be flipped to the outside of the exhaust cavity 22 to open the corresponding exhaust ports 23 under the push of the negative pressure on both sides of the exhaust cavity 22 and the leeward side.

[0031] The phase change energy storage plate 3 is arranged at one end of the air outlet 14 close to the air inlet cavity 12, so that the external air flow entering from the air inlet 13 blows toward the phase change energy storage plate 3 through the air outlet 14 of the air inlet cavity 12; the air inlet 24 of the exhaust cavity 22 and the air outlet 14 of the air inlet cavity 12 are located on both sides of the phase change energy storage plate 3.

[0032] The working principle of indoor temperature control and energy storage of the natural ventilation and cooling device using phase change materials and multi-directional wind towers disclosed in the utility model is as follows: the induced draft device 1 and the exhaust device 2 in the natural ventilation and cooling device using phase change materials and multi-directional wind towers disclosed in the utility model are fixedly installed in an open environment outside the roof, the phase change energy storage plate 3 is arranged in the roof 4, and an air flow channel 40 is formed between the phase change energy storage plate 3 and the inner side of the roof, the lower end of the induced draft device frame passes through the roof and is placed in a position indoors close to the roof and between the phase change energy storage plate and the roof, and the air inlet of the exhaust cavity of the exhaust device is arranged on the side of the phase change energy storage plate opposite to the roof. Since the draft device and the exhaust device are placed in an open external environment, when there is airflow (wind) passing through the outside, due to the Bernoulli principle, the air pressure on the side of the device facing the airflow (windward side) is large, and the air pressure on the side away from the airflow (leeward side) is small. Therefore, the draft device baffle on the side of the draft device facing the airflow (windward side) in the device is flipped toward the inside of the draft cavity under the action of the external airflow, so that the corresponding air inlet is opened, and the high-temperature airflow from the outside enters the draft cavity through the air inlet. The other draft device baffles in the draft device are buckled on the draft device frame under the pressure of the internal and external airflows, thereby closing the other air inlets. The airflow entering the draft cavity is blown toward the phase change energy storage plate through the air outlet of the draft cavity. The phase change energy storage plate absorbs the heat of the external airflow to produce a phase change and then realize energy storage, and at the same time adjusts the temperature of the incoming airflow. The cooled airflow enters the room through the airflow channel between the roof and the phase change energy storage plate, ensuring indoor ventilation, thereby enabling the room to obtain continuous and stable fresh air. Similarly, under the Bernoulli effect of the airflow, the exhaust device baffle on the side facing the airflow (windward side) is buckled on the exhaust outlet, so that the corresponding exhaust outlet is closed, while the exhaust device baffle located on the leeward side of the airflow (leeward side) has a smaller pressure on the leeward side due to the Bernoulli effect. Therefore, the exhaust device baffle on the leeward side is flipped toward the outside of the exhaust cavity under the action of the airflow on both sides of the exhaust cavity and the negative pressure on the leeward side, thereby realizing the opening of the exhaust outlet, and the high-temperature air in the room can enter the exhaust cavity through the entrance of the exhaust cavity, and then be discharged to the outside through the exhaust outlet.

[0033] Specifically, during the day, the temperature outside is relatively high, and the high-temperature airflow outside enters the air inlet cavity through the air inlet, and passes through the air inlet cavity and blows to the phase change energy storage board from the air outlet of the air inlet cavity. The phase change energy storage board produces a phase change to absorb the heat of the high-temperature airflow, and at the same time reduces the temperature of the incoming airflow, so that the cooled airflow enters the room through the gas flow channel between the roof and the phase change energy storage board; at night, the temperature outside is relatively low, and the low-temperature airflow outside enters the air inlet cavity through the air inlet, and passes through the air inlet cavity and blows to the phase change energy storage board from the air outlet of the air inlet cavity. The phase change energy storage board produces a phase change to release the stored heat, and then heats up the incoming low-temperature airflow, so that the heated airflow enters the room through the gas flow channel between the roof and the phase change energy storage board. That is, the present application utilizes multi-directional natural ventilation equipment, and sets a PCM module (phase change energy storage board) in the ventilation inlet duct, absorbs the heat of hot air during the day, and releases it at night, providing a stable constant temperature fresh air condition that meets the indoor comfort for the indoor environment. While ensuring indoor comfort, it significantly reduces energy consumption and carbon dioxide emissions.

[0034] This application combines multi-directional natural ventilation equipment with PCM materials to generate stable fresh air into the room in any wind direction, and ensure that the fresh air entering the room can reach the comfortable indoor temperature range after being processed by PCM. In addition, since the air flow direction inside the ventilation system is not affected by the wind direction, it can be ensured that the latent heat of PCM only acts on the fresh air entering the room, which can effectively improve the overall long-term energy-saving efficiency of the system.

[0035] Furthermore, the air inducing device 1 and the air exhausting device 2 are coaxially arranged;

[0036] The exhaust device 2 is arranged at the upper end of the air induction device 1, and the exhaust device 2 also includes an exhaust pipe 25, which passes through the air inlet cavity 12 and is connected to the exhaust cavity 22 at one end, and the other end passes through the phase change energy storage plate 3 to form an air inlet 24 of the exhaust cavity 22.

[0037] Specifically, in the present application, by fixing the exhaust device on the upper end of the induced draft device, that is, the induced draft device frame and the exhaust device frame are fixed into an integrated structure by welding or other means, and the two are coaxially arranged, not only the overall volume of the device is reduced, but also it is convenient for installation and transportation.

[0038] Further, the upper end of the air induction device baffle 11 is hinged to the air induction device frame 10, and in a free state, the air induction device baffle 11 is buckled on the air inlet 13 to close the air inlet 13. The upper end of the exhaust device baffle 21 is hinged to the exhaust device frame 20, and in a free state, the exhaust device baffle 21 is buckled on the exhaust port 23 to close the exhaust port 23.

[0039] Specifically, in the present application, the upper ends of the induced draft device baffle and the exhaust device baffle can be respectively hinged to the induced draft device frame and the exhaust device frame by structures such as a rotating shaft or a hinge or other low-resistance connection and fixing methods, so that the induced draft device baffle or the exhaust device baffle can be flipped under external force (the force of airflow), thereby realizing the opening of the air inlet or the air outlet. At the same time, when there is no external force or the external force is small, it can automatically return to a closed state under the action of gravity, thereby ensuring the reliability of its operation and improving the efficiency of storing energy using airflow.

[0040] Furthermore, the air induction device frame 10 is a columnar structure with a polygonal cross section, and an air inlet cavity is provided in the columnar structure; the air exhaust device frame 21 is a columnar structure with a polygonal cross section, and an air exhaust cavity is provided in the columnar structure.

[0041] Specifically, the induced draft device frame and the exhaust device frame are both columnar structures with polygonal cross-sections. In the present embodiment, the induced draft device frame 10 has a regular octahedron cross-section; the exhaust device frame 20 also has a regular octahedron cross-section, that is, the induced draft device frame and the exhaust device frame both include eight side panels, and the eight side panels are sequentially connected (welded) to each other to form an octagonal cylinder structure, and the inner cavity of the cylinder structure is the air inlet cavity or the air exhaust cavity. In the present embodiment, the exhaust device is installed on the induced draft device, and a partition for separating the air inlet cavity and the air exhaust cavity is provided between the exhaust device and the induced draft device, and the partition is connected to the exhaust cylinder so that the exhaust cavity is connected to the exhaust cylinder, and an end plate for sealing the end is provided at the upper end of the exhaust cavity, and an opening is provided on the side plate to form an air inlet or an air exhaust port. In the present embodiment, the opening on the side panel is a square opening, and the lower end of the induced draft device frame forms an air outlet of the air inlet cavity. The polygonal column structure enables the natural ventilation and cooling device of the phase change material and multi-directional wind tower disclosed in the utility model to better utilize airflows in different directions, that is, no matter what direction of airflow the phase change material and multi-directional wind tower natural ventilation and cooling device disclosed in the utility model is placed in, the air induction device and the exhaust device can work normally, and the Bernoulli effect is more obvious when the airflow flows through the regular polygon, that is, when the airflow flows through the regular polygon, the pressure difference between the windward side and the leeward side is large, so that a large airflow difference is formed between the air induction device and the exhaust device, thereby increasing the airflow and airflow speed passing through the device, improving the energy storage efficiency, and effectively regulating the indoor temperature. At the same time, the structure can enable only the air induction device baffle on the windward side to be opened under the action of airflow, while the wind baffles in the other directions are closed under the action of negative pressure to prevent air from flowing out, and ensure that the air inlet cavity can maximize the use of the positive pressure of wind pressure to drive air into the air induction cavity.

[0042] Furthermore, the side wall of the air inlet device frame 10 is provided with two or more layers of air inlets 13 in the circumferential direction, and the air inlet device frame 10 is provided with a plurality of air inlet device baffles 1 equal in number to the air inlet 13;

[0043] The side wall surface of the exhaust device frame 20 is circumferentially provided with two or more layers of exhaust ports 23 , and the exhaust device frame 20 is provided with a plurality of exhaust device baffles 21 equal in number to the exhaust ports 23 .

[0044] Specifically, in the present application, two sides or multiple layers of air inlets are provided on the air induced device frame so that it can capture more airflow, and two or more layers of air exhaust ports are provided on the air exhaust device frame to facilitate the discharge of airflow, thereby further improving the utilization of airflow and improving energy storage efficiency.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A natural ventilation cooling device using phase change materials and multi-directional wind towers, characterized in that: It includes an air induction device, an air exhaust device and a phase change energy storage plate; The air inducing device comprises an air inducing device frame and an air inducing device baffle; An air inlet cavity is provided in the air inlet device frame, and a plurality of air inlets connected to the air inlet cavity are circumferentially arranged on the side wall of the air inlet device frame. A plurality of air inlet device baffles that can only be opened toward the inside of the air inlet cavity are provided on the air inlet device frame, and the air inlet device baffles can be flipped toward the inside of the air inlet cavity to open the corresponding air inlets under the push of the airflow on the windward surface; The exhaust device comprises an exhaust device frame and an exhaust device baffle; An exhaust cavity is provided in the exhaust device frame, and a plurality of exhaust ports connected to the exhaust cavity are circumferentially provided on the side wall surface of the exhaust device frame. A plurality of exhaust device baffles that can only be opened to the outside of the exhaust cavity are provided on the exhaust device frame. The exhaust device baffles can be flipped to the outside of the exhaust cavity to open the corresponding exhaust ports under the push of the negative pressure on both sides of the exhaust cavity and the leeward side. The phase change energy storage plate is arranged at one end of the air outlet close to the air inlet cavity, so that the external airflow entering from the air inlet blows toward the phase change energy storage plate through the air outlet of the air inlet cavity; the air inlet of the exhaust cavity and the air outlet of the air inlet cavity are located on both sides of the phase change energy storage plate.

2. The natural ventilation cooling device using phase change material and multi-directional wind tower according to claim 1 is characterized in that: The air inducing device and the air exhausting device are coaxially arranged; The exhaust device is arranged at the upper end of the air induction device, and the exhaust device also includes an exhaust tube, which passes through the air inlet cavity and is connected to the exhaust cavity at one end, and the other end passes through the phase change energy storage plate to form an air inlet of the exhaust cavity.

3. The natural ventilation cooling device using phase change material and multi-directional wind tower according to claim 1 is characterized in that: The upper end of the air induction device baffle is hinged to the air induction device frame. In a free state, the air induction device baffle is buckled on the air inlet to close the air inlet.

4. The natural ventilation and cooling device using phase change materials and multi-directional wind towers according to claim 1 is characterized in that: The upper end of the exhaust device baffle is hinged to the exhaust device frame. In a free state, the exhaust device baffle is buckled on the exhaust port to close the exhaust port.

5. The natural ventilation cooling device using phase change material and multi-directional wind tower according to any one of claims 1 to 4, characterized in that: The air induction device frame is a column structure with a polygonal cross section, and an air inlet cavity is provided in the column structure; The exhaust device frame is a column structure with a polygonal cross section, and an exhaust cavity is arranged in the column structure.

6. The natural ventilation and cooling device using phase change materials and multi-directional wind towers according to claim 5 is characterized in that: The side wall of the air induction device frame is provided with two or more layers of air inlets in the circumferential direction, and the air induction device frame is provided with a plurality of air induction device baffles equal to the number of the air inlets; The side wall surface of the exhaust device frame is circumferentially provided with two or more layers of exhaust ports, and the exhaust device frame is provided with a plurality of exhaust device baffles equal to the number of the exhaust ports.

7. The natural ventilation cooling device using phase change material and multi-directional wind tower according to claim 6, characterized in that: The air induction device and the air exhaust device are fixedly installed on the outside of the roof, the phase change energy storage panel is arranged inside the roof, and an air flow channel is formed between the phase change energy storage panel and the inside of the roof.

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