A preset split ratio double-outlet direct-current cooling blower

Abstract

The utility model relates to a preset shunt ratio's double outlet air port direct -current heat dissipation blower, be used for realizing the air cooling heat dissipation of equipment in mini PC, including fan impeller and volute, be equipped with a plurality of air flue in volute, each air flue has different orientation, and the end of each air flue forms outlet air port, and the outlet air port between adjacent has the preset included angle, makes the airflow in the volute blow to different direction, be equipped with the flow -guiding piece between adjacent air flue, the flow -guiding piece with the included angle of predetermined angle between the side wall of volute, makes each air flue in the predetermined proportion of air volume that flows, satisfy the demand of fan air volume CFM and airflow velocity required by heat dissipation, the larger air volume is blown out through the fin of two outlet air ports, has reduced the wind speed and noise. While satisfying the heat dissipation proportion in two directions inside the mainframe box, also has reduced the volume of heat dissipation blower, satisfies the host body size requirement of mini PC.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal fan technology, specifically to a dual-outlet DC cooling blower with a preset flow ratio. Background Technology

[0002] A mini PC (microcomputer host) is a small, portable computer device commonly used in home entertainment, business offices, and technology fields. Unlike the bulky traditional computer host, a mini PC has a relatively compact microcomputer host. The size of the microcomputer host is not limited by the screen size, making it extremely portable. Mini smart computers can easily switch between display devices such as LCD monitors, televisions, and projectors anytime, anywhere.

[0003] Thermal Design Power (TDP) refers to the maximum amount of heat generated by a processor when operating at full load, measured in watts. TDP is a core reference indicator for thermal system design. To meet the cooling requirements of devices, sufficient fan airflow (CFM) is needed; however, high-speed airflow over fins generates significant noise. Due to the small size of mini PCs and limited space within the chassis, the compact structure of various components places even higher demands on heat dissipation and noise control in models with TDPs of 45W, 65W, or even higher. Utility Model Content

[0004] In view of this, it is necessary to provide a dual-outlet DC cooling blower with a preset split ratio that disperses airflow and significantly reduces flow velocity.

[0005] A DC cooling blower with a preset flow split ratio and dual air outlets is used to achieve air cooling of devices in a mini PC. It includes a blower impeller and a volute. The volute contains multiple air ducts, each with a different orientation. Each air duct ends in an air outlet, and adjacent air outlets are at a preset angle to direct airflow in different directions within the volute. A guide vane is provided between adjacent air ducts, and the guide vane forms a predetermined angle with the sidewall of the volute to allow a predetermined proportion of airflow to pass through each air duct.

[0006] Preferably, a heat dissipation device is provided on the outer side of the volute, with one side of the heat dissipation device attached to the volute and the other side of the heat dissipation device attached to the equipment. The heat dissipation device is used to conduct the heat generated by the equipment during operation to the volute.

[0007] Preferably, the guide vane is disposed between adjacent air ducts, and the guide vane is used to divide the volute into multiple independent air ducts.

[0008] Preferably, the guide vane is disposed between the connection point of the two air outlets and the fan impeller, the cross-section of the guide vane is triangular, the tip of the guide vane faces the fan impeller, and the width of the end of the guide vane is adapted to the distance between the two adjacent air outlets.

[0009] Preferably, each of the air outlets is provided with fins, the fins comprising a plurality of parallel heat dissipation substrates, the fins abutting against the heat dissipation device to increase the heat dissipation area.

[0010] Preferably, the air duct is disposed between the fan impeller and the fins. The airflow in each air duct depends on the angle between the guide vane and the outer wall of the volute. The width of the air duct is adapted to the proportion of the airflow passing through the air duct. The air duct with a predetermined length is used to increase the contact area with the heat dissipation device to improve heat dissipation efficiency.

[0011] Preferably, there is a predetermined included angle between the front end sidewalls on both sides of the air duct, the involute angle of the air duct is adapted to the outlet airflow angle of the fan impeller, and each of the air ducts is trumpet-shaped to reduce wind speed and noise.

[0012] Preferably, the ends of the two side walls of the air duct are arranged in parallel, and the parallel side walls form an air duct front chamber. The air duct front chamber is used to make the airflow evenly blow into the fins to reduce noise.

[0013] Preferably, the upper and lower sides of the guide vane are closely fitted to the inner sides of the upper and lower sidewalls of the volute, adjacent air ducts are separated by the guide vane, and the outer sidewall of each air duct is integrally formed by the sidewall of the volute.

[0014] Preferably, the fins are provided with shock-absorbing foam, which abuts against the inner side of the equipment housing to reduce the noise during the operation of the blower.

[0015] In the aforementioned dual-outlet DC cooling blower with a preset flow ratio, multiple outlets are incorporated to meet the required fan airflow volume (CFM) and air velocity for heat dissipation. A larger volume of air is blown out through the fins of two outlets, reducing both air velocity and blower noise. Furthermore, the two outlets are positioned perpendicularly to each other at 90 degrees, and the airflow ratio is set to 6.5:3.5 based on the fin length. This satisfies the heat dissipation requirements in both directions within the chassis while simultaneously reducing the blower's size, thus meeting the dimensions of a mini PC. This invention is simple in structure, easy to implement, low in cost, and readily applicable. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the structure of a dual-outlet DC cooling blower with a preset flow ratio according to an embodiment of this utility model. Figure 1 .

[0017] Figure 2 This is a schematic diagram of the structure of a dual-outlet DC cooling blower with a preset flow ratio according to an embodiment of this utility model. Figure 2 (Remove the top cover of the volute).

[0018] Figure 3 This is a schematic diagram of the structure of a dual-outlet DC cooling blower with a preset flow ratio according to an embodiment of this utility model (excluding the volute cover and fins). Detailed Implementation

[0019] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings.

[0020] Please see Figures 1 to 3 This paper illustrates a dual-outlet DC cooling blower 100 with a preset flow ratio for air cooling of devices within a mini PC. The blower includes a fan impeller 10 and a volute 20. The volute 20 contains multiple air ducts 21, each with a different orientation. Each air duct 21 ends in an air outlet 22, with a preset angle between adjacent outlets to direct airflow in different directions within the volute 20. A guide vane 23 is positioned between adjacent air ducts 21, forming a predetermined angle with the sidewall of the volute 20 to allow a predetermined proportion of airflow to pass through each air duct 21.

[0021] Specifically, in this embodiment, the included angle between the two air outlets 22 is 90 degrees, which gives the DC cooling blower multiple air-cooling channels, increases the heat dissipation area, and improves heat dissipation efficiency.

[0022] Specifically, changing the angle of the guide vane 23 can adjust the airflow ratio of the two air outlets 22 and isolate the two air outlets 22 to avoid turbulent airflow and vortex noise.

[0023] Preferably, a heat dissipation device 30 is provided on the outer side of the volute 20. One side of the heat dissipation device 30 is attached to the volute 20, and the other side of the heat dissipation device 30 is attached to the equipment. The heat dissipation device 30 is used to conduct the heat generated by the equipment during operation to the volute 20.

[0024] Specifically, the heat dissipation device 30 is attached to the outer side of the volute 20, so that the heat dissipation device 30 can be used as a mounting bracket for the heat dissipation blower, which can simplify the structure of the equipment and increase the space utilization rate.

[0025] Preferably, the guide vane 23 is disposed between adjacent air ducts 21, and the guide vane 23 is used to divide the volute 20 into multiple independent air ducts 21. The guide vane 23 is disposed between the connection of the two air outlets 22 and the fan impeller 10. The cross-section of the guide vane 23 is triangular, the tip of the guide vane 23 faces the fan impeller 10, and the width of the end of the guide vane 23 is adapted to the distance between the two adjacent air outlets 22.

[0026] Specifically, the opening angle of the side wall end of the guide vane 23 is adapted to the orientation of the air outlets 22 on both sides of the guide vane 23, and the two side walls at the air outlets 22 of the air duct 21 are parallel.

[0027] Specifically, in this embodiment, the air volume of the two air ducts 21 is preferably 65% ​​and 35%, respectively. By setting the included angle between the guide vane 23 and the side wall of the air duct 21 to different angles, the proportion of air volume in the air duct 21 can be changed.

[0028] In other embodiments, the air volume ratio of the two air ducts 21 can be adjusted to 6:4, 7:3 or 8:2.

[0029] Preferably, each of the air outlets 22 is provided with fins 24, the fins 24 comprising a plurality of parallel heat dissipation substrates, the fins 24 abutting against the heat dissipation device 30 to increase the heat dissipation area.

[0030] Specifically, in this embodiment, the heat dissipation device 30 includes a copper heat sink and a heat pipe. The copper heat sink and the heat pipe are attached to the chip and are used to conduct heat generated by the chip. Both air outlets 22 are provided with fins 24, and both sets of fins 24 are in contact with the copper heat sink and the heat pipe. The two air outlets 22 and the two sets of fins 24 face different directions to achieve better heat dissipation.

[0031] Specifically, in this embodiment, the volute 20 is divided into two air ducts 21, and the air outlets 22 of both air ducts 21 are provided with fins 24. When the total air volume remains unchanged, the air volume carried by a single fin 24 is reduced, and the wind speed and wind pressure flowing through the fin 24 will be reduced, thereby reducing the noise generated when the airflow passes through the fin 24.

[0032] Preferably, the air duct 21 is disposed between the fan impeller 10 and the fins 24. The airflow in each air duct 21 depends on the angle between the guide vane 23 and the outer wall of the volute 20. The width of the air duct 21 is adapted to the proportion of the airflow passing through the air duct 21. The air duct 21 with a predetermined length is used to increase the contact area with the heat dissipation device 30 to improve the heat dissipation efficiency.

[0033] Preferably, the front end sidewalls on both sides of the air duct 21 have a predetermined included angle, the involute angle of the air duct 21 is adapted to the outlet airflow angle of the fan impeller 10, and each of the air ducts 21 is trumpet-shaped to reduce wind speed and noise.

[0034] Specifically, the impeller outlet airflow angle (β2) is the direction angle of the absolute velocity vector of the fluid (gas or liquid) as it leaves the impeller blade outlet. The volute helix involute angle (α) is the angle between the tangent of the volute helical channel (usually a logarithmic helix or Archimedean helix) at the initial position (near the tongue) and the circumferential direction (base circle tangent direction) at that point.

[0035] Typically, when designing the rated operating point (design flow rate), α ≈ β2 is required. Matching the involute angle (α) of the volute helix with the absolute flow angle (β2) of the impeller outlet airflow is primarily intended to guide the fluid smoothly into the volute channel, avoiding or minimizing impact losses. In addition, it also has the advantages of reducing flow losses, lowering noise, stabilizing airflow, and improving energy conversion efficiency.

[0036] Specifically, the axial direction of the fan impeller 10 is unobstructed, and the air inlet of the fan impeller 10 is far away from other equipment, so that the air duct 21 of the fan impeller 10 is unobstructed.

[0037] Preferably, the ends of the two side walls of the air duct 21 are arranged in parallel, and the parallel side walls form a front chamber of the air duct 21. The front chamber of the air duct 21 is used to make the airflow evenly blow into the fins 24 to reduce noise.

[0038] Specifically, the front section of the air duct 21 is gradually opening into a trumpet shape, the rear section of the air duct 21 is parallel, and the end of the air duct 21 is an air outlet 22. The air outlet 22 is provided with the fins 24. The fan impeller 10 sends the air with a higher wind speed into the air duct 21. As the air duct 21 gradually increases in size, the wind speed decreases. At the air outlet 22 of the air duct 21, the wind speed is gentle and is delivered parallel to the fins 24. The wind speed is lower and passes parallel to the fins 24, reducing airflow noise.

[0039] Preferably, the upper and lower sides of the guide vane 23 are closely fitted to the inner sides of the upper and lower sidewalls of the volute 20, and adjacent air ducts 21 are separated by the guide vane 23. The outer sidewall of each air duct 21 is integrally extended from the sidewall of the volute 20.

[0040] Specifically, the upper and lower sidewalls of each of the air ducts 21 share the top and bottom surfaces of the volute 20, and the air duct 21 located on the outer side uses the outer side wall of the volute 20 as the outer side wall of the air duct 21.

[0041] Preferably, the fin 24 is provided with shock-absorbing foam 25, which abuts against the inner side of the equipment housing to reduce the noise of the blower during operation.

[0042] Specifically, under ideal conditions (no resistance, uniform airflow), for a fan outlet 22 of a given size, the airflow and air velocity are directly proportional:

[0043] Air volume = air velocity × cross-sectional area of ​​air outlet.

[0044] In the technical solution of the present invention, the cooling blower has two mutually perpendicular air outlets 22, and each air outlet 22 is provided with fins 24. That is, by increasing the cross-sectional area of ​​the air outlet 22, the speed of the airflow flowing through the air outlet 22 is reduced, the noise of the cooling blower is reduced, the total air volume remains unchanged, and the heat dissipation effect of the equipment is ensured.

[0045] In the aforementioned dual-outlet DC cooling blower 100 with a preset flow ratio, multiple outlets 22 are provided in the blower to meet the fan airflow CFM and airflow velocity requirements for heat dissipation. A larger volume of air is blown out through the fins 24 of two outlets 22, reducing the airflow velocity and thus the blower noise. Furthermore, the two outlets 22 are arranged perpendicularly at 90 degrees, and the airflow ratio is set to 6.5:3.5 based on the length of the fins 24. This satisfies the heat dissipation ratio in two directions inside the chassis while also reducing the size of the cooling blower, meeting the size requirements of a mini PC chassis. This invention has a simple structure, is easy to implement, has low cost, and is easy to promote.

[0046] It should be noted that this utility model is not limited to the above-described embodiments. Based on the inventive spirit of this utility model, those skilled in the art can make other changes, and these changes made based on the inventive spirit of this utility model should be included within the scope of protection claimed by this utility model.

Claims

1. A DC cooling blower with a preset flow ratio and dual outlets, used to achieve air-cooling of devices within a mini PC, characterized in that, The device includes a fan impeller and a volute. The volute contains multiple air ducts, each with a different orientation. Each air duct ends at an air outlet, and adjacent air outlets are at a predetermined angle to direct the airflow within the volute in different directions. A guide vane is provided between adjacent air ducts, and the guide vane is at a predetermined angle to the sidewall of the volute to allow a predetermined proportion of airflow to pass through each air duct.

2. The dual-outlet DC cooling blower with a preset flow ratio as described in claim 1, characterized in that, A heat dissipation device is provided on the outside of the volute. One side of the heat dissipation device is attached to the volute, and the other side of the heat dissipation device is attached to the equipment. The heat dissipation device is used to conduct the heat generated by the equipment during operation to the volute.

3. The DC cooling blower with a preset flow ratio and dual air outlets as described in claim 1, characterized in that, The guide vanes are disposed between adjacent air ducts, and the guide vanes are used to divide the volute into multiple independent air ducts.

4. The DC cooling blower with a preset flow ratio and dual air outlets as described in claim 1, characterized in that, The guide vane is disposed between the connection point of the two air outlets and the fan impeller. The cross-section of the guide vane is triangular, the tip of the guide vane faces the fan impeller, and the width of the end of the guide vane is adapted to the distance between the two adjacent air outlets.

5. The DC cooling blower with a preset flow ratio and dual air outlets as described in claim 2, characterized in that, Each of the air outlets is provided with fins, and the fins include several heat dissipation substrates arranged in parallel. The fins abut against the heat dissipation device to increase the heat dissipation area.

6. The DC cooling blower with a preset flow ratio and dual outlets as described in claim 5, characterized in that, The air duct is located between the fan impeller and the fins. The airflow in each air duct depends on the angle between the guide vane and the outer wall of the volute. The width of the air duct is adapted to the proportion of the airflow passing through it. The air duct with a predetermined length is used to increase the contact area with the heat dissipation device to improve heat dissipation efficiency.

7. The DC cooling blower with a preset flow ratio and dual air outlets as described in claim 1, characterized in that, The front sidewalls on both sides of the air duct have a predetermined included angle, and the involute angle of the air duct is adapted to the outlet airflow angle of the fan impeller. Each of the air ducts is trumpet-shaped to reduce wind speed and noise.

8. The DC cooling blower with a preset flow ratio and dual air outlets as described in claim 5, characterized in that, The ends of the two side walls of the air duct are set in parallel, and the parallel side walls form an air duct front chamber. The air duct front chamber is used to make the airflow evenly blow into the fins to reduce noise.

9. The dual-outlet DC cooling blower with a preset flow ratio as described in claim 1, characterized in that, The upper and lower sides of the guide vane are closely fitted to the inner sides of the upper and lower sidewalls of the volute. Adjacent air ducts are separated by the guide vane, and the outer sidewall of each air duct is integrally formed by the sidewall of the volute.

10. The dual-outlet DC cooling blower with a preset flow ratio as described in claim 5, characterized in that, The fins are provided with shock-absorbing foam, which abuts against the inside of the equipment housing to reduce the noise of the blower during operation.

Images