Redundant fan structure capable of switching air ducts

Abstract

The utility model discloses a redundant fan structure capable of switching air ducts, which relates to the technical field of heat dissipation of power equipment and comprises a fan component, an air duct component and a switching component. The fan assembly comprises at least two fans arranged side by side, an air inlet is formed in the bottom of each fan, the two fans are separated by a fan partition plate, an air outlet is formed in the fan assembly, and an independent heat dissipation air channel is formed between the air inlet and the air outlet of each fan. And the air duct assembly is arranged at the bottom of the fan assembly, is provided with a through air duct and is used for communicating the to-be-cooled equipment with the fan assembly. The switching assembly is arranged at an air inlet of the fan assembly, fixed to the bottom of the fan fixing bottom plate, comprises an air opening baffle, an electric push rod, a sliding rail and a limiting mechanism, and is used for switching the air inlet so as to achieve fan switching. Under the condition that the fan does not stop, the heat dissipation air channels can be rapidly switched, the time for replacing the faulted fan is shortened, and continuous production of enterprises is guaranteed without stop.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation of electric power equipment, in particular to a redundant fan structure with switchable air ducts. Background Art

[0002] Redundancy, also known as reserve technology or sometimes disaster recovery, utilizes a parallel system model to improve system reliability. Simply put, it involves duplicating some system components. When a system failure occurs, the redundant components take over the work of the failed component, thereby reducing system downtime.

[0003] Redundancy technology is currently widely used in fan control systems. For example, high-voltage inverters typically use air cooling to dissipate heat from their heat-generating components. Consequently, these devices are often equipped with a variety of fans. However, due to long-term operation and the harsh operating environment of electrical equipment, fans can easily become damaged. This damage can cause the equipment to overheat, malfunction, and ultimately halt production, resulting in significant losses. Furthermore, replacing a faulty fan requires downtime to ensure personnel safety, which can also impact production efficiency. Utility Model Content

[0004] To solve the above problems, the present invention proposes a redundant fan structure with switchable air ducts, which is used to solve the problem that when only one fan is installed in an electrical device, the fan must be shut down and reinstalled after a failure.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A redundant fan structure with switchable air ducts comprises a fan assembly, an air duct assembly, and a switching assembly. The fan assembly includes at least two side-by-side first and second fans, a fan frame for accommodating the first and second fans, and a fan mounting base for mounting and securing the first and second fans. The fan mounting base is fixedly connected to the fan frame, and a first air inlet and a second air inlet are provided at the air inlet positions of the first and second fans, respectively.

[0007] The air duct assembly is arranged below the fan assembly and is fixedly connected to the fan frame. The air duct assembly is provided with a through air duct, one end of which is connected to the first air inlet or the second air inlet, and the other end is connected to the air outlet of the device to be cooled.

[0008] The switching assembly is located within the fan assembly and includes an air outlet baffle mounted on the bottom of the fan's fixed base plate, a drive component, a guide component, and a limit mechanism. The guide component is arranged parallel to the axis connecting the first and second air inlets. The limit mechanism includes a position detection unit and a limit unit. The drive component drives the air outlet baffle to slide along the guide component until the position detection unit is triggered. The limit unit limits the sliding position of the air outlet baffle, causing it to block the first or second air inlet, thereby enabling the fan to switch air inlets and complete the air duct switching.

[0009] Furthermore, the guide component includes two slide rails and a plurality of sliders. The slide rails are linear guide rails, respectively installed on both sides of the first air inlet and the second air inlet. The sliders are placed in the two slide rails and cooperate with the slide rails to realize the sliding of the air inlet baffle.

[0010] Furthermore, the driving component is configured as an electric push rod, the telescopic rod head of the electric push rod is fixed on the air outlet baffle, the push rod base and the push rod housing are fixed on the fan fixed base plate, and the power cord of the electric push rod is connected to the external controller.

[0011] Furthermore, a position detection unit is mounted on the fan's fixed baseplate and includes an electromagnetic lock and a travel switch. The electromagnetic lock is located at the beginning and end of one of the slide rails' sliding travel, with its lock head facing the rail, and is used to lock the air outlet baffle. The travel switch is located at the beginning and end of the other slide rail's sliding travel, symmetrically with the electromagnetic lock, with its contacts facing inward and perpendicular to the slide rail's sliding direction, and is used to detect the sliding position of the air outlet baffle.

[0012] Furthermore, the limit units are located at the beginning and end of the slide rails' travel, mounted and fixed to the fan fixed base plate, and include a first limit block and a second limit block. The first limit block is located on the side away from the push rod base, mounted between the two slide rails, and perpendicular to the slide rails' sliding direction. The second limit block is located on the side close to the push rod base, mounted between the two slide rails, and perpendicular to the slide rails' sliding direction.

[0013] Furthermore, the fan assembly is provided with an air outlet, and a flange and a filter are provided at the air outlet. The flange is fixed to the outer frame of the air outlet and serves as a mounting plate for the external air duct; the filter is provided on the inner frame of the air outlet.

[0014] Furthermore, two limiting holes are provided on one side of the electromagnetic lock on the air vent baffle, and their positions match the positions of the electromagnetic lock head.

[0015] Furthermore, a limit bend is provided on one side of the air outlet baffle corresponding to the travel switch.

[0016] Furthermore, the tuyere baffle is configured in a "J"-shaped cross-section, with the middle portion positioned between the two slide rails, the two side legs positioned above the two slide rails, and the sliders mounted at the bottoms of the two side legs. The sliders cooperate with the slide rails to enable the tuyere baffle to slide back and forth linearly along the slide rails.

[0017] Furthermore, the fan assembly further includes a fan partition fixed between the first fan and the second fan. The fan partition is used to separate the first fan and the second fan, ensuring that the first fan and the second fan are not connected, and the air paths between the two fans from the air inlet to the air outlet are independent of each other.

[0018] The technical effects achieved by this utility model are:

[0019] 1. By installing two fans side by side, when a fan fails, the backup fan can be immediately switched to the backup fan, which greatly reduces the time to replace the failed fan and ensures continuous production of the enterprise;

[0020] 2. Each fan has an independent air duct to reduce mutual interference between the two fans. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The figure shows a schematic diagram of a redundant fan structure with switchable air ducts proposed by the present invention;

[0022] Figure 2 Shown is a schematic structural diagram of the fan assembly proposed in the present invention;

[0023] Figure 3 The figure shows the structure diagram of the air duct assembly proposed by the present invention;

[0024] Figure 4 Shown is a schematic diagram of the switching component structure proposed by the present invention;

[0025] Figure 5 The figure shows the structure diagram of the slide rail and slider proposed in the present invention;

[0026] Figure 6 Shown is a schematic structural diagram of the air outlet baffle proposed by the present invention after switching the air inlet.

[0027] Figure 1: Fan assembly 1; Air duct assembly 2; Switch assembly 3; First fan 10; Second fan 11; Fan frame 12; Fan fixing base plate 13; Flange 14; Fan partition 15; Filter 16; Fan baffle 17; Top plate 18; Handle 19; Air duct frame 20; Sealing baffle 21; Air outlet baffle 30; Electric push rod 31; Slide rail 32; Slider 33; Travel switch 34; Electromagnetic lock 35; First limit block 36; Second limit block 37; Limit hole 38; Limit bend 300; Push rod base 310; Telescopic rod head 311. DETAILED DESCRIPTION

[0028] The following description is merely a preferred embodiment of the present invention. The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate understanding of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, all inventions and creations utilizing the present invention are protected as long as the various variations are within the spirit and scope of the present invention as defined and determined by the appended claims, without departing from the principles of the present invention.

[0029] Figure 1 The figure shows a schematic diagram of a redundant fan structure with switchable air ducts proposed by the present invention. Figure 1 Figure 1 shows a redundant fan structure with switchable air ducts, comprising: a fan assembly 1, an air duct assembly 2, and a switching assembly 3. The fan assembly 1 is positioned above, the air duct assembly 2 is positioned below and fixedly connected to the fan assembly 1, and the switching assembly 3 is located within the fan assembly 1. To achieve optimal heat dissipation, the gaps or air leaks between the fan assembly 1 and the air duct assembly 2 are sealed using a dispensing process and a baffle structure.

[0030] Figure 2 The figure shows a schematic diagram of the fan assembly proposed by the present invention, as shown in FIG. Figure 2 As shown, the fan assembly 1 includes at least two first fans 10 and second fans 11 arranged side by side, a fan frame 12 for accommodating the first fans 10 and the second fans 11, and a fan fixing base plate 13 for installing and fixing the first fans 10 and the second fans 11.

[0031] Specifically, the fan frame 12 is configured as a frame enclosed on all sides and hollow inside. A fan fixing base plate 13 is positioned within the fan frame 12 and fixedly connected thereto, with no particular restrictions on the method of attachment. The fan fixing base plate 13 divides the interior of the fan frame 12 into upper and lower sections. The first fan 10 and the second fan 11 are positioned within the upper section of the fan frame 12 and are mounted and fixed to the fan fixing base plate 13.

[0032] The fan frame 12 is provided with an air outlet, and a flange 14 and a filter 16 are provided at the air outlet. The flange 14 is fixed to the air outlet outer frame and serves as a mounting plate for the external air duct. The air outlet inner frame, i.e., the inner side of the fan frame 12, is provided with a filter 16.

[0033] The fan mounting base 13 is provided with a first air inlet and a second air inlet at the air inlet positions of the first fan 10 and the second fan 11, respectively. A fan partition 15 is also provided between the first fan 10 and the second fan 11 to separate the two fans, ensuring that the first fan 10 and the second fan 11 are not connected, and the air paths from the first air inlet to the air outlet, or from the second air inlet to the air outlet, remain independent of each other.

[0034] To ensure the airtightness of the fan assembly 1 and prevent air leakage, fan baffles 17 are fixedly mounted around the fan frame 12, in addition to the air outlet. The specific structure of the fan baffles 17 is not limited. A top plate 18 is fixed to the top of the fan frame 12. At the same time, a handle 19 is also mounted on the top plate 18 to facilitate installation and removal. The specific structure and position of the handle 19 are not limited.

[0035] Figure 3 The figure shows a schematic diagram of the air duct assembly proposed by the present invention, as shown in FIG. Figure 3 As shown, the air duct assembly 2 is disposed below the fan assembly 1 and is fixedly connected to the fan frame 12. The air duct assembly 2 includes an air duct frame 20 and a sealing baffle 21.

[0036] Specifically, the air duct frame 20 is configured as a frame enclosing all four sides with a through-flow air duct in the middle. The through-flow air duct serves as a heat dissipation duct. One end of the through-flow air duct is connected to the first air inlet or the second air inlet, and the other end is connected to the air outlet of the device to be cooled. To facilitate connection with the air outlet of the device to be cooled, the through-flow air duct end of the air duct frame 20 is configured as a flange.

[0037] To ensure the airtightness of the air duct assembly 2 and prevent air leakage, a fixed sealing baffle 21 is installed around the air duct frame 20 to form a sealed air duct. The specific structure of the sealing baffle 21 is not limited.

[0038] Figure 4 The figure shows a schematic diagram of the switching component proposed by the present invention, as shown in FIG. Figure 4 As shown, the switching component 3 is located inside the fan component 1, in the lower part of the fan frame 12 separated by the fan fixed base plate 13. The switching component 3 includes an air outlet baffle 30 installed at the bottom of the fan fixed base plate 13, a driving component, a guide component and a limiting mechanism. The guide component is arranged parallel to the axis connecting the first air inlet and the second air inlet, and the air outlet baffle 30 slides linearly along the guide component. The limiting mechanism includes a position detection unit and a limiting unit. The driving component drives the air outlet baffle 30 to slide along the guide component until the position detection unit is triggered. The limiting unit limits the sliding position of the air outlet baffle 30, so that the air outlet baffle 30 blocks the first air inlet or the second air inlet, so that the fan switches the air inlet and completes the air duct switching.

[0039] The guide components of this embodiment include two slide rails 32 and a plurality of sliders 33. The slide rails 32 are linear guide rails, which are respectively installed on both sides of the first air inlet and the second air inlet of the fan fixed base plate 13. The sliders 33 are placed in the two slide rails 32.

[0040] Figure 5 The figure shows the structure of the slide rail and the slider proposed by the present invention. Figure 5As shown, the cross section of the air vent baffle 30 is arranged in a "F" shape, with the middle portion thereof being positioned between two slide rails 32, the two side legs being positioned above the two slide rails 32, and the sliders 33 being mounted at the bottom of the two side legs and positioned within the two slide rails 32. The air vent baffle 30 is moved back and forth linearly along the slide rails 32 by the sliders 33.

[0041] like Figure 4 As shown, the driving component of this embodiment is an electric push rod 31. The telescopic rod head 311 of the electric push rod 31 is fixed to the air outlet baffle 30. The push rod base 310 and push rod housing are fixed to the fan fixed base plate 13. The power cord of the electric push rod 31 is connected to an external controller. To better secure the electric push rod 31, this embodiment has a vertical bend in the air outlet baffle 30 to secure the telescopic rod head 311. Similarly, a vertical bend is provided on the fan fixed base plate 13 to secure the push rod base 310 and push rod housing.

[0042] The position limiting mechanism includes a position detection unit and a position limiting unit. In this embodiment, the position detection unit is configured as an electromagnetic lock 35 and a travel switch 34, which are mounted and fixed to the fan fixed base plate 13. The electromagnetic lock 35 is located at the beginning and end of the sliding travel of one of the slide rails 32, with its locking head facing the slide rail 32, and is used to lock the air outlet baffle 30. The travel switch 34 is located at the beginning and end of the sliding travel of the other slide rail 32, and is arranged symmetrically with the electromagnetic lock 35. Its contacts face inward and perpendicular to the sliding direction of the slide rail 32, and are used to detect the sliding position of the air outlet baffle 30.

[0043] The limiting units of this embodiment are provided at the beginning and end of the sliding travel of the slide rails 32 and are fixed to the fan fixed base plate 13. Specifically, they are provided as a first limiting block 36 and a second limiting block 37. The first limiting block 36 is provided on the side away from the push rod base 310, installed between the two slide rails 32, and perpendicular to the sliding direction of the slide rails 32. The second limiting block 37 is provided on the side close to the push rod base 310, installed between the two slide rails 32, and perpendicular to the sliding direction of the slide rails 32. The first limiting block 36 and the second limiting block 37 can be provided as commonly used L-shaped angle irons, or rectangular steel structures, etc., and the present invention does not impose any specific restrictions.

[0044] Figure 6 The figure shows the structure of the utility model after the air inlet baffle is switched. Figure 4 、 Figure 6 As shown, the air vent baffle 30 is provided with two stopper holes 38 on one side of the electromagnetic lock 35, their positions matching the position of the electromagnetic lock 35's lock head. The hole shape of the stopper holes 38 can be round or bar-shaped, and this is not limited in the present invention. A stopper bend 300 is provided on the side of the air vent baffle 30 corresponding to the limit switch 34. When the stopper bend 300 contacts the limit switch 34, it indicates that the limit switch 34 has reached the desired position.

[0045] When one of the first and second fans 10, 11 fails, the electric push rod 31 controller is started, and the electric push rod 31 drives the air outlet baffle 30 to slide linearly along the slide rail 32. The limit bend 300 of the air outlet baffle 30 triggers the travel switch 34, indicating that the travel is in place, and the lock head of the electromagnetic lock 35 falls into the limit hole 38 of the air outlet baffle 30 to lock the air outlet baffle 30. The first limit block 36 or the second limit block 37 prevents the air outlet baffle 30 from continuing to slide. At this time, the air outlet baffle 30 blocks the air inlet of the failed fan, that is, the first air inlet or the second air inlet, so that it can quickly switch the air duct and switch the backup fan without stopping the machine, thereby ensuring continuous production of the enterprise.

[0046] Although the specific embodiments of the present invention are described in detail in conjunction with the accompanying drawings, this should not be construed as limiting the scope of protection of the present utility model patent. Within the scope described by the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of the present utility model patent.

Claims

1. A redundant fan structure with switchable air ducts, characterized in that: include: A fan assembly (1) comprises at least two first fans (10) and a second fan (11) arranged side by side, a fan frame (12) for accommodating the first fan (10) and the second fan (11), and a fan fixing base plate (13) for mounting and fixing the first fan (10) and the second fan (11); the fan fixing base plate (13) is provided with a first air inlet and a second air inlet at air inlet positions of the first fan (10) and the second fan (11), respectively; An air duct assembly (2) is provided below the fan assembly (1) and fixedly connected to the fan frame (12), the air duct assembly (2) being provided with a through air duct, one end of the through air duct being connected to the first air inlet or the second air inlet, and the other end being connected to the air outlet of the device to be cooled; The switching assembly (3) is located in the fan assembly (1), and includes an air outlet baffle (30) installed at the bottom of the fan fixed base plate (13), a driving component, a guide component and a limiting mechanism; the guide component is arranged parallel to the axis connecting the first air inlet and the second air inlet; the limiting mechanism includes a position detection unit and a limiting unit; the driving component drives the air outlet baffle (30) to slide linearly along the guide component until the position detection unit is triggered, and the limiting unit limits the sliding position of the air outlet baffle (30), so that the air outlet baffle (30) blocks the first air inlet or the second air inlet to achieve air duct switching.

2. The redundant fan structure with switchable air duct according to claim 1, characterized in that: The guide component comprises two slide rails (32) and a plurality of sliders (33); the slide rails (32) are linear guide rails, respectively installed on both sides of the first air inlet and the second air inlet; the sliders (33) are placed in the two slide rails (32).

3. The redundant fan structure with switchable air duct according to claim 2, characterized in that: The driving component is configured as an electric push rod (31), a telescopic rod head (311) of the electric push rod (31) is fixed to the air outlet baffle (30), a push rod base (310) and a push rod housing are fixed to the fan fixed base plate (13), and a power line of the electric push rod (31) is connected to an external controller.

4. The redundant fan structure with switchable air duct according to claim 3, characterized in that: The position detection unit is mounted and fixed on the fan fixed base plate (13), and comprises: An electromagnetic lock (35) is respectively provided at the beginning and end of the sliding stroke of one of the slide rails (32), with its lock head facing the slide rail (32) and used to lock the air outlet baffle (30); The travel switch (34) is respectively arranged at the beginning and end of the sliding travel of the other slide rail (32) and is symmetrically arranged with the electromagnetic lock (35). Its contact is inwardly facing and perpendicular to the sliding direction of the slide rail (32) and is used to detect the sliding position of the air outlet baffle (30).

5. The redundant fan structure with switchable air duct according to claim 3, characterized in that: The limiting unit is provided at the first and last ends of the sliding travel of the slide rail (32), and is mounted and fixed on the fan fixed base plate (13), and comprises: A first limit block (36) is provided on a side away from the push rod base (310), installed between the two slide rails (32), and perpendicular to the sliding direction of the slide rails (32); The second limit block (37) is provided on a side close to the push rod base (310), installed between the two slide rails (32), and perpendicular to the sliding direction of the slide rails (32).

6. The redundant fan structure with switchable air duct according to claim 1, characterized in that: The fan assembly (1) is provided with an air outlet, and a flange (14) and a filter screen (16) are provided at the air outlet. The flange (14) is fixed to the outer frame of the air outlet, and the filter screen (16) is arranged in the inner frame of the air outlet.

7. The redundant fan structure with switchable air duct according to claim 4, characterized in that: Two limiting holes (38) are provided on one side of the air duct baffle (30) where the electromagnetic lock (35) is located, and their positions match the position of the lock head of the electromagnetic lock (35).

8. The redundant fan structure with switchable air duct according to claim 4, characterized in that: A limiting bend (300) is provided on one side of the air duct baffle (30) corresponding to the travel switch (34).

9. The redundant fan structure with switchable air duct according to claim 2, characterized in that: The cross-section of the air duct baffle (30) is "U"-shaped. The middle part is placed between two slide rails (32), and the two side legs are respectively located above the two slide rails (32). The slider (33) is installed at the bottom of the two side legs; the air duct baffle (30) is matched with the slide rails (32) through the slider (33) to realize the linear reciprocating sliding of the air duct baffle (30) along the slide rails (32).

10. The redundant fan structure with switchable air duct according to claim 1, characterized in that: The fan assembly (1) further includes a fan partition (15), which is fixed in the middle of the first fan (10) and the second fan (11).

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