A high refrigeration performance circulating fan

Abstract

The utility model provides a kind of high refrigeration performance's circulating fan, air duct uses the design of different cross-sectional area of air inlet end, air outlet end and wind passing section, combine the shell of hyperbolic structure and outer wall surface smooth transition, air inlet end large cross-sectional area makes air mass enter, wind passing section small cross-sectional area accelerates airflow, according to Bernoulli's principle, flow rate accelerates and causes pressure to reduce, temperature drops, and gas is similar to adiabatic expansion in flow, work to outside makes internal energy decrease.Air outlet grille area is less than air inlet grille, and air outlet grille strip is located between adjacent air inlet grille strip, avoid airflow interference, ensure air orderly flow, air outlet grille towards the sharp corner structure of air inlet end, not only strengthen air outlet directional property, make airflow concentrated blow out, expand refrigeration coverage, it is also possible to airflow produce cutting and disturbance, promote heat exchange, improve refrigeration performance, the refrigeration performance and circulation performance of the fan are used with air conditioner, and good energy-saving effect can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of high-performance circulating fans, and more particularly to a high-performance circulating fan. Background Technology

[0002] In common circulating fans, airflow efficiency and guidance are often problematic. Traditional fan duct designs are often inadequate, with a relatively simple internal structure and a lack of refined planning for airflow direction. When the fan is running, air enters the duct from the inlet, and because the cross-sectional areas of the duct are not scientifically designed, turbulence easily occurs during airflow.

[0003] For example, if the cross-sectional area of ​​the air duct remains unchanged or changes improperly, vortices and backflows will occur as the airflow passes through. This not only hinders the smooth flow of air but also consumes a large amount of energy. As a result, the energy output by the fan motor cannot be effectively converted into kinetic energy to propel the airflow, leading to low airflow efficiency.

[0004] Furthermore, the blades of traditional fan impellers are mostly simple planar shapes, which are not good at guiding airflow. When the fan rotates, the blades exert a relatively singular force on the air, failing to guide the air through the duct and efficiently blow it out from the outlet along an ideal path. Some fans have poor airflow directionality and short airflow projection distance, making them unable to meet the air circulation needs of large spaces. Utility Model Content

[0005] In view of this, the technical problem to be solved by this utility model is: how to provide a high-performance cooling circulating fan to improve the air delivery performance of the air duct.

[0006] To achieve the above objectives, this utility model proposes a high-performance cooling circulating fan, which includes a housing, an air duct formed inside the housing, one end of the housing being an air inlet, the other end of the housing being an air outlet, and an air passage being formed between the air inlet and the air outlet.

[0007] The cross-sectional area of ​​the air inlet in the vertical direction is larger than that of the air outlet in the vertical direction, and the cross-sectional area of ​​the air outlet in the vertical direction is larger than the minimum cross-sectional area of ​​the air passage section in the vertical direction. The outer wall surface of the shell has a smooth transition connection.

[0008] The air inlet end is provided with an air inlet grille, and the air outlet end is provided with an air outlet grille. The air inlet grille is composed of multiple air inlet grille bars, and the air outlet grille is composed of multiple air outlet grille bars.

[0009] On the housing, in the axial direction from the air inlet end to the air outlet end, any one of the air outlet grilles is located between two adjacent air inlet grilles;

[0010] The area of ​​the grille formed by the multiple air outlet grilles is smaller than the area of ​​the grille formed by the multiple air inlet grilles;

[0011] The air outlet grille has a pointed structure on the side facing the air inlet.

[0012] Furthermore, at least one fan impeller is provided inside the air duct, and the fan impeller is mounted on a rotating shaft.

[0013] Furthermore, a detachable dustproof net is provided on the outer periphery of the air inlet end of the housing, and the dustproof net is connected to the housing through a snap-fit ​​structure.

[0014] Furthermore, the thickness of the slats of the air outlet grille is 1.2-1.5 times that of the air inlet grille.

[0015] Compared with related technologies, the high-performance circulating fan proposed in this utility model has the following advantages: The air duct employs a design with different cross-sectional areas at the inlet, outlet, and air passage sections. Combined with a hyperbolic shell with a smoothly transitioned outer wall, the large cross-sectional area at the inlet allows a large amount of air to enter, while the small cross-sectional area of ​​the air passage section accelerates the airflow. According to Bernoulli's principle, the increased flow velocity leads to a decrease in pressure and temperature. Furthermore, the gas undergoes adiabatic expansion during flow, doing work on the surroundings and reducing its internal energy, further cooling the air and enhancing the cooling effect. The layout of the inlet and outlet grilles optimizes airflow. The outlet grille area is smaller than the inlet grille, and the outlet grille bars are located between adjacent inlet grille bars, avoiding airflow interference and ensuring orderly airflow. The pointed structure of the outlet grille facing the inlet not only enhances the directionality of the airflow, concentrating the airflow and expanding the cooling coverage area, but also may cut and disturb the airflow, promoting heat exchange and improving cooling performance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the high-cooling-performance circulating fan in an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the air inlet end in an embodiment of the present utility model;

[0018] Figure 3 This is a cross-sectional schematic diagram of the air outlet grille in an embodiment of this utility model;

[0019] Figure 4 This is a graph showing the mathematical equation corresponding to the shell that constitutes the hyperbolic air duct structure in this embodiment of the present invention. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Please see Figure 1-4 As shown, this utility model proposes a high-performance cooling circulating fan, which includes a housing 11, an air duct is formed inside the housing 11, one end of the housing 11 is set as an air inlet 12, the other end of the housing 11 is an air outlet 13, and an air passage 14 is formed between the air inlet 12 and the air outlet 13.

[0022] The cross-sectional area of ​​the air inlet 12 in the vertical direction is larger than that of the air outlet 13 in the vertical direction. The cross-sectional area of ​​the air outlet 13 in the vertical direction is larger than the minimum cross-sectional area of ​​the air passage section 14 in the vertical direction. The outer wall of the shell 11 has a smooth transition connection and forms a hyperbolic structure.

[0023] The cooling system employs a design with different cross-sectional areas for the air inlet (12), air outlet (13), and air passage section. Combined with the hyperbolic structure of the shell (11) and its smoothly transitioned outer wall, it creates a Venturi-like effect. The large cross-sectional area of ​​the air inlet (12) allows a large amount of air to enter, while the small cross-sectional area of ​​the air passage section accelerates the airflow. According to Bernoulli's principle, the increased flow velocity leads to a decrease in pressure, which in turn lowers the temperature. Furthermore, the gas undergoes adiabatic expansion during flow, doing work on the surroundings and reducing its internal energy, further cooling the system and enhancing its cooling effect.

[0024] The fan inlet 12 has a larger vertical cross-sectional area than the outlet 13, which in turn has a larger cross-sectional area than the minimum cross-sectional area of ​​the air passage. Furthermore, the outer wall of the casing 11 has a smooth transition and forms a hyperbolic structure. According to the Bernoulli effect, fluid pressure decreases as its velocity increases, and temperature is related to pressure. When air enters from the inlet 12 and passes through the air passage, the smaller cross-sectional area causes the air velocity to increase, resulting in lower pressure and consequently lower air temperature. This process allows the air entering the duct to begin cooling during its flow, laying the foundation for subsequent refrigeration.

[0025] Air flows within the duct, moving from the larger inlet end 12 to the smaller outlet section, essentially undergoing an adiabatic expansion process. During adiabatic expansion, the gas does work on its surroundings, its internal energy decreases, and its temperature drops. The fan's unique duct structure facilitates this adiabatic expansion, further reducing the air temperature and enhancing the cooling effect.

[0026] The shell 11, which forms the air duct structure, constitutes a hyperbolic structure, and its equation is:

[0027]

[0028] Preferred: a / b;

[0029] Preferred: a / b = 1 / 2;

[0030] The preferred value is: a / b = 12 / 24.51.

[0031] The front and rear air grilles of the fan are staggered, meaning that the columns of the exhaust grille bisect the surface of the intake grille, so that the airflow is cut in the same direction and blown out through a narrower channel (the total area of ​​the air holes in the intake grille is smaller than the total area of ​​the air holes in the exhaust grille), which causes the airflow temperature to decrease a third time.

[0032] An air inlet grille 21 is provided at the air inlet end 12, and an air outlet grille 22 is provided at the air outlet end 13. The air inlet grille 21 is composed of multiple air inlet grilles, and the air outlet grille 22 is composed of multiple air outlet grilles 221.

[0033] On the housing 11, in the axial direction from the air inlet end 12 to the air outlet end 13, any air outlet grille 221 is located between two adjacent air inlet grilles.

[0034] The area of ​​the grille formed by multiple air outlet grilles 22 is smaller than the area of ​​the grille formed by multiple air inlet grilles 21, and the thickness of the grille bars of the air outlet grille 22 is 1.2-1.5 times that of the air inlet grille.

[0035] The air outlet grille 22 forms a sharp angle structure 222 on one side facing the air inlet end 12. The sharp angle structure 222 further optimizes the direction and effect of the air outlet, improves the air flow speed and directionality, and enhances the cooling performance and coverage of the fan.

[0036] The pointed structure 222 of the air outlet grille 22 facing the air inlet 12 can cut and guide the outflowing air, making the air blown out more concentrated, reducing energy loss during air diffusion, thereby increasing the speed and distance of the air outlet and expanding the cooling coverage area; at the same time, this structure may cause some disturbance to the air, promote heat exchange between the air and the surrounding environment, and further improve the cooling performance.

[0037] The air intake grille 21 is composed of multiple air intake grille bars. Its main purpose is to perform preliminary filtration and guidance on the air entering the air duct, prevent larger foreign objects from entering the air duct, and ensure that the air can enter the air duct relatively evenly.

[0038] The grille structure composed of multiple air intake bars not only provides protection, but also reduces air intake resistance due to its placement at the air intake end 12 and the relatively large grille area it forms. This allows a large amount of air to enter the air duct smoothly, providing the basic conditions for subsequent airflow and cooling effect.

[0039] The air outlet grille 22 is composed of multiple air outlet grille strips 221, which are mainly used to organize and guide the air blown out from the air duct, so that it is blown out in a specific direction and state. At the same time, it plays a certain role in protecting the internal structure of the air duct and preventing foreign objects from entering.

[0040] The area of ​​the grille formed by the air outlet grille 22 is smaller than that of the air inlet grille 21, and any air outlet grille 221 is located between two adjacent air inlet grilles. This layout can more finely organize the air, avoid turbulence at the air outlet, and ensure the stability and orderliness of the air outlet. The thickness of the grille 22 is 1.2-1.5 times that of the air inlet grille 21, which increases the strength and durability of the air outlet grille 22 and better protects the internal structure of the air duct.

[0041] At least one fan impeller is installed inside the air duct. The fan impeller is mounted on a rotating shaft. A detachable dustproof screen is provided on the outer periphery of the air inlet end 12 of the housing 11. The dustproof screen is connected to the housing 11 through a snap-fit ​​structure. The detachable dustproof screen on the outer periphery of the air inlet end 12 of the housing 11 is connected through a snap-fit ​​structure, which makes it convenient for users to disassemble and clean at any time, prevents dust from entering, and ensures the performance and service life of the fan.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-performance cooling circulating fan, characterized in that, It includes a housing, the interior of which forms an air duct, one end of which is set as an air inlet, and the other end of which is set as an air outlet, with an air passage formed between the air inlet and the air outlet; The cross-sectional area of ​​the air inlet in the vertical direction is larger than that of the air outlet in the vertical direction, and the cross-sectional area of ​​the air outlet in the vertical direction is larger than the minimum cross-sectional area of ​​the air passage section in the vertical direction. The outer wall surface of the shell has a smooth transition connection. The air inlet end is provided with an air inlet grille, and the air outlet end is provided with an air outlet grille. The air inlet grille is composed of multiple air inlet grille bars, and the air outlet grille is composed of multiple air outlet grille bars. On the housing, in the axial direction from the air inlet end to the air outlet end, any one of the air outlet grilles is located between two adjacent air inlet grilles; The area of ​​the grille formed by the multiple air outlet grilles is smaller than the area of ​​the grille formed by the multiple air inlet grilles; The air outlet grille has a pointed structure on the side facing the air inlet.

2. The high-cooling-performance circulating fan as described in claim 1, characterized in that, At least one fan impeller is provided inside the air duct, and the fan impeller is mounted on a rotating shaft.

3. The high-cooling-performance circulating fan as described in claim 2, characterized in that, A detachable dustproof net is provided on the outer periphery of the air inlet end of the housing, and the dustproof net is connected to the housing by a snap-fit ​​structure.

4. The high-cooling-performance circulating fan as described in claim 3, characterized in that, The thickness of the air outlet grille bars is 1.2-1.5 times that of the air inlet grille.

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