WO2012058951A1

WO2012058951A1 - Enclosure

Info

Publication number: WO2012058951A1
Application number: PCT/CN2011/077736
Authority: WO
Inventors: 李晓鹏; 刘丰林
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-11-05
Filing date: 2011-07-28
Publication date: 2012-05-10
Also published as: CN201897755U

Abstract

Disclosed is an enclosure, comprising a case. Guide plates are disposed near the upper and lower ends of the case forming an air inlet channel, an air outlet channel and a main cavity for mounting a function board and a PCB therein; the air inlet channel has an air inlet located at the front of the case; the air outlet channel has an air outlet located at the back of the case; a fan box fixed to the case is disposed on the air outlet; through the ducting effect of the fan, external air flows via the air inlet into the air inlet channel, then flows via the main cavity into the air outlet channel and flows out of the case via the air outlet. Through the ducting effect of the fan, the air flows in a "Z"-shaped path within the enclosure, thus the air flow is rationally distributed within the enclosure and flows in and out of the enclosure more evenly and smoothly, and reducing the overall height and volume of the enclosure.

Description

Chassis technology field

The utility model relates to a chassis, in particular to a chassis for a communication product. Background technique

In the communications electronics industry, chassis are widely used to house PCB boards, various function boards, power boxes, and fans. For example, the computer chassis is used to place motherboards, CPUs, optical drives, and other devices. With the development and advancement of technology, the functions of various devices in the chassis are getting stronger and stronger, and the problem that comes with it is the heat dissipation problem caused by the increase of power consumption. If the heat dissipation of the chassis is not good, it will affect various devices in the chassis. The performance of the machine, even due to excessive temperature, damages the equipment or shortens the service life. Therefore, the heat dissipation problem of the chassis has always been a concern of the industry.

Figure 1 shows the structure of the existing chassis. The structure of the chassis is that the air ducts at the upper and lower ends are large. This is because the chassis uses a straight-through heat dissipation structure, that is, by loading The whole layer of the fan is provided in the cabinet. When the heat is dissipated, the whole layer of the fan blows up or down in the chassis. The airflow is in the form of straight-through motion for heat dissipation. When the chassis is designed, it must be kept at the fan inlet and outlet. Space to ensure that the fan works properly. Due to the limited size of the fan inlet and outlet ports due to the straight-through heat dissipation form, the size of the chassis is difficult to shrink. Utility model content

The main object of the present invention is to provide a chassis that reduces the volume occupied and improves the heat dissipation performance.

In order to achieve the above object, the technical solution of the present invention is realized as follows:

A chassis includes a box body and a fan box, wherein the box body is enclosed by a bottom plate, a top plate, a left side plate, a right side plate and a rear rail assembly; the chassis further includes an upper rail plate and a lower rail plate, Description The upper rail plate and the lower rail plate are fixed in the box body, and the bottom plate, the lower rail plate, the upper rail plate and the top plate divide the box into three cavities which are sequentially connected, and the rear end of the cavity is a part of the rear rail assembly, wherein a cavity between the bottom plate and the lower rail plate is a first cavity, and a cavity between the upper rail plate and the top plate is a second cavity, the lower rail plate The cavity between the upper and the upper rail plates is a main cavity, the front end of the first cavity is provided with an air inlet, and correspondingly, the rear end of the second cavity is provided with an air outlet, and the fan box is fixed at the Said on the box and facing the air outlet.

Wherein, a wind deflector fixed to the bottom plate or the left side plate and the right side plate is disposed between the lower rail plate and the bottom plate, and the air guiding plate is disposed at a position close to the rear rail assembly, the guide The angle between the wind plate and the bottom plate is greater than 90°.

The angle between the air deflector and the bottom plate is 150°.

The air duct isolation and flow equalization plate is disposed above the upper rail plate, and the rear end surface of the air channel isolation and flow plate is adjacent to the air outlet.

Wherein, the two sides of the air duct isolation and flow sharing plate are provided with a flange, and the flange is fixed to the left side plate and the right side plate.

Wherein, the front end of the air duct isolation and flow equalization plate is provided with a downward bending such that the front end surface thereof is in contact with the upper rail plate.

The back end of the main cavity is mounted with a PCB back plate, and an upper portion of the PCB back plate and a rear end of the second cavity form an air outlet.

Wherein, a shielding net for preventing electromagnetic waves from entering the casing is disposed at the position of the air inlet, and a decorative cover is disposed outside the shielding net.

Wherein, the upper rail plate is provided with a duct isolation current sharing zone.

A chassis includes a box body and a fan box, wherein the box body is enclosed by a bottom plate, a top plate, a left side plate, a right side plate and a rear rail assembly; the chassis further includes an upper rail plate and a lower rail plate, The upper rail plate and the lower rail plate are fixed in the box body, and the bottom plate, the lower rail plate, the upper rail plate and the top plate divide the box into three sequentially communicating cavities, and the rear end of the cavity For the back guide a portion of the rail assembly, wherein the cavity between the bottom plate and the lower rail plate is a first cavity, and the cavity between the upper rail plate and the top plate is a second cavity, the lower rail plate and the upper rail The cavity between the plates is a main cavity, the front end of the second cavity is provided with an air inlet, and correspondingly, the rear end of the first cavity is provided with an air outlet, and the fan box is fixed to the box Up and right for the outlet.

Wherein, a wind deflector fixed to the top plate or the left side plate and the right side plate is disposed between the upper rail plate and the top plate, and the air guiding plate is disposed at a position close to the rear rail assembly, the guide The angle between the wind plate and the top plate is greater than 90. .

The utility model has the beneficial effects that: under the drainage of the fan, the airflow enters the first cavity from the air inlet, passes through the main cavity, and finally, enters the second cavity to the rear of the second cavity and flows out from the air outlet. Overall, the path of the airflow in the box is a "Z" shape. The "Z"-shaped air duct structure, due to the drainage of the fan, makes the airflow distributed in the chassis reasonably, and the access to the chassis is more uniform and smooth. The thermal performance of the chassis. When the chassis size is the same, the "Z" type air duct structure has better heat dissipation than the straight-through air duct structure, so that the chassis can be loaded into a large-capacity function board. More importantly, the fan box of the "Z" air duct structure is placed outside the cabinet, and the air inlet and outlet are located in front of and behind the cabinet, and there is no need to be restricted by the working space of the fan inlet and outlet, which can be directly opened, and the sharing machine rejects the depth space. , thus effectively reducing the overall height and volume of the chassis. For example, when inserting a high-capacity, high-power, high-power single-board device with the same height of 9U (1U = 44.45mm), the traditional straight-through air-structure chassis requires an overall chassis height of 27U to meet the heat dissipation requirements. For the chassis of the "Z" type air duct structure, only the overall height of the chassis is 14U, that is, the height of the first cavity and the second cavity are set to 2U to 3U to meet the heat dissipation requirement.

Therefore, the present invention achieves the effect of making the chassis small in size, large in capacity, and good in heat dissipation performance by proposing the design concept of the "Z" type air duct. DRAWINGS

Figure 1 is a schematic view of a conventional straight-through air duct case; 2 is a schematic view of a cabinet 100 according to an embodiment of the present invention;

Figure 3 is a schematic view showing the components of the box body in the embodiment of the present invention;

4 is a schematic view of a duct isolation flow equalization plate 106 according to an embodiment of the present invention;

FIG. 5 is a partial schematic view showing the installation position of the left side panel visible air duct isolation and flow equalization plate 106 according to an embodiment of the present invention; FIG.

Figure 6 is a schematic view showing the mounting of the PCB backplane 200 in the cabinet 100 of the embodiment of the present invention; Figure 7 is a schematic view of the front side of the cabinet 100 inserted into the functional panel 300 according to the embodiment of the present invention; A schematic view of the rear power supply box 400 and the rear fan box 500 inserted into the cabinet 100;

FIG. 9 is a schematic diagram of an internal airflow path of a chassis having a duct isolation flow equalization plate 106 according to an embodiment of the present invention; FIG.

FIG. 10 is a schematic diagram showing the airflow path inside the chassis when the airflow isolation barrier is not provided in the embodiment of the present invention. detailed description

The present invention will be further described in detail below with reference to the accompanying drawings. Example 1

As shown in FIGS. 2 and 3, the cabinet 100 is enclosed by a left side panel 101, a right side panel 102, a bottom panel 109, a top panel 107, and a rear rail assembly 110. The front panel of the cabinet 100 may be provided with a front cover. When installing the device, the function board mounted on the front end of the cabinet 100 is used as the front cover. A guide rail is provided on the rear rail assembly 110 to facilitate installation of various devices. A handle 103 is disposed on the left side plate 102 to facilitate the removal of the case.

In the casing 100, a lower rail plate 105 is disposed at a position above the bottom plate 109 near the bottom plate 109, and the lower rail plate 105 is fixed to the left side plate 101 and the right side plate 102, and the box is divided into upper and lower two communicating. The cavity, the cavity including the bottom plate 109 may be referred to as a first cavity, and the first cavity may serve as an air inlet passage for the airflow, which is implemented at the front end of the cabinet 100 (away from the rear rail assembly) The end of 110) opens into the tuyere. The airflow enters the first cavity through the air inlet. In order to speed up the airflow into the upper portion of the casing 100, a wind deflector 108 is disposed between the lower rail plate 105 and the bottom plate 109, and the air deflector 108 is disposed adjacent to the rear rail assembly 110. The position is fixed to the bottom plate 109 or the left side plate 101 and the right side plate 102, and the angle between the air deflector 108 and the bottom plate 109 is generally greater than 90. , when the angle is 145 to 150. The guiding effect is better. A shielding net 112 is provided at the air inlet, that is, the opening portion of the first cavity, to prevent electromagnetic waves from entering the casing. The air filter 113 is horizontally inserted under the lower rail plate 105 of the first cavity, and the lower decorative cover 115 is installed outside the shielding net 112. After the installation, the air filter 113 is horizontally inserted and removed.

Below the top cover 107, an upper rail plate 104 is disposed adjacent to the top cover 107. The upper rail plate 104 also divides the box into two upper and lower communicating cavities, including the cavity of the top cover 107. It can be called a second cavity. At the entire rear end of the second chamber, there is an air outlet, and the tuyere is facing the fan box 500 (see Fig. 5), and the gas in the box is taken out from the air outlet into the environment. The fan box 500 is inserted into the rear of the box along the guide rails disposed on the rear rail assembly 110, and can cover the air outlets of the second chamber and the main cavity when in position (see FIG. 5), and the gas in the box 100 is pulled out of the box. . After the fan case is loaded into the cabinet, the fan is located behind the second cavity and above the rear PCB backplane of the main cavity (see FIG. 5), and is fixed to the rear rail assembly 110 and the top plate 107 (see FIG. 8); The front end of the cavity (the end remote from the rear rail assembly) is provided with a cable tray assembly 111 on which the trim cover 114 is mounted.

When installed, as shown in FIG. 3, the left side plate 101, the right side plate 102, the pull handle 103, the upper rail plate 104, the lower rail plate 105, the top cover 107, the air guide plate 108, the bottom plate 109, and the rear rail assembly 110 are provided. The cable tray assembly 111, the shielding net 112, the dustproof net 113, the upper trim cover 114, and the lower trim cover 115 are assembled into the box body 100 by screwing, riveting or snapping;

As shown in Figure 6, the PCB backplane 200 is first installed in the cabinet;

As shown in Figure 7, the function board 300 is inserted from the front of the box;

As shown in Fig. 8, the rear power supply box 400 and the rear fan 500 are inserted from the rear of the cabinet. The box body of the above structure has the first cavity as the air inlet passage, the second cavity or the upper portion of the first cavity and the main cavity as the air passage, and it can be understood that the first cavity is used as the air passage The second cavity or the second cavity and the lower portion of the main cavity serve as air inlet passages, and is also an implementable solution. Moreover, the air inlet is in front or behind, and the air outlet is also possible in the back or in front. As long as there is a front and rear direction of the box, the inlet and outlet air inlets can form a "Z" type air duct structure.

Since the fan box is placed at the rear of the box, there are few restrictions on selecting the fan, and it is convenient to select a fan that satisfies the heat dissipation of the large-depth function board, and the volume of the first cavity and the second cavity as the air passage is relatively small. Small, thus greatly reducing the height of the box, achieving the small size requirements of the chassis. At the same time, the volume of the main cavity is relatively large, and PCB boards of various depths and various functional boards can be installed, thereby meeting the large capacity requirement in a small volume. At the same time, the fan makes the airflow path in the box "Z" shape, the airflow can quickly enter the first cavity, and then enter the main cavity, and at the same time, through the action of the air deflector, the airflow can be accelerated into the main cavity. After the main cavity absorbs heat, part of it is removed from the main cavity by the fan, and the other part enters the second cavity from the front of the main cavity, and the second cavity is pulled out of the case by the fan.

Example 2:

As shown in FIG. 10, since the depth of the casing 100 is large and the airflow has the characteristic of flowing along the shortest path, the above structure may have a high temperature dead zone 6 above the front end of the casing, and the key is that the high temperature dead zone 6 appears in the main Above the front of the cavity, causing damage to the equipment located in that portion of the cavity.

As shown in Figures 4 and 5, a method of preventing the occurrence of a high temperature dead zone is to install a duct isolation runner 106 on the upper rail plate 104 such that most of the airflow entering the second chamber is along the upper rail plate 104. The front section enters, and the air duct isolation flow equalization plate 106 is distributed with a certain number and size of ventilation holes, allowing a small amount of airflow to pass from the main cavity to the second cavity through the ventilation holes, thereby allowing the flow rate of the airflow into the second chamber. Optimal control can prevent high temperature dead zones more effectively. The venting holes are determined by the thermal performance analysis of the number and power of various functional devices installed in the box, and then the number and size of the vent holes and the position on the airflow isolation equalizing plate are determined. The rear end of the air duct isolation and flow equalization plate 106 is in contact with the fan 500 at the air outlet, and the front end has a downwardly bent connecting portion, the end surface of the connecting portion is in contact with the upper rail plate 104, and the air duct is isolated 106 is located above the upper rail plate 104. There are flanges on both sides of the air duct isolation and flow equalization plate 106. The flanges fix the air duct isolation and flow equalization plate 106 to the left and right side plates to avoid large vibrations, which cause the air duct to isolate the flow plates. Fall off. The air duct isolation flow equalization plate 106 makes the flow direction of the air flow more reasonable, and avoids the occurrence of a high temperature dead zone in the tank body due to the flow of the air flow in the shortest path.

It will be appreciated that it is also possible to provide the above-described arrangement of the air duct isolation runners 106 by providing a duct isolation flow area on the upper rail plate 104.

The above is a further detailed description of the present invention in conjunction with the specific embodiments, and the specific implementation of the present invention is not limited to the description. For those skilled in the art, a number of simple deductions or substitutions may be made without departing from the spirit of the present invention, and should be considered as belonging to the scope of protection of the present invention.

Claims

Claim

1 . A chassis comprising a box body and a fan box, wherein the box body is enclosed by a bottom plate, a top plate, a left side plate, a right side plate and a rear rail assembly; the chassis further comprises an upper rail plate and a lower rail plate The upper rail plate and the lower rail plate are fixed in the box body, and the bottom plate, the lower rail plate, the upper rail plate and the top plate divide the box into three sequentially communicating cavities, and the cavity is a rear end is a part of the rear rail assembly, wherein a cavity between the bottom plate and the lower rail plate is a first cavity, and a cavity between the upper rail plate and the top plate is a second cavity, The cavity between the lower rail plate and the upper rail plate is a main cavity, the front end of the first cavity is provided with an air inlet, and correspondingly, the rear end of the second cavity is provided with an air outlet, the fan box It is fixed on the box and is opposite to the air outlet.

2. The chassis according to claim 1, wherein a wind deflector fixed to the bottom plate or the left side plate and the right side plate is disposed between the lower rail plate and the bottom plate, and the air guiding plate is disposed close to The position of the rear rail assembly is such that an angle between the air deflector and the bottom plate is greater than 90. .

3. The chassis according to claim 2, wherein an angle between the air deflector and the bottom plate is 150°.

The chassis of any one of claims 1 to 3, further comprising a duct isolation flow equalization plate, wherein the air duct isolation flow equalization plate is disposed above the upper rail plate, the air duct is isolated The rear end surface of the flow equalization plate is close to the air outlet.

The chassis of claim 4, wherein two sides of the air duct isolation and flow sharing plate are provided with a flange, and the flange is fixed to the left side plate and the right side plate.

6. The chassis according to claim 4, wherein a front end of the air duct isolation and flow equalization plate is provided with a downward bend such that a front end surface thereof is in contact with the upper rail plate.

The chassis of any one of claims 1 to 3, wherein a rear surface of the main cavity is mounted with a PCB backplane, and an upper portion of the PCB backplane and a rear end of the second cavity form a common Air outlet „

The chassis according to any one of claims 1 to 3, wherein a shielding net for preventing electromagnetic waves from entering the casing is provided at the position of the air inlet, and a decorative cover is provided outside the shielding net.

The chassis according to any one of claims 1 to 3, wherein the upper rail plate is provided with a duct isolation current sharing zone.

10 . A chassis comprising a box body and a fan box, wherein the box body is enclosed by a bottom plate, a top plate, a left side plate, a right side plate and a rear rail assembly; the chassis further comprises an upper rail plate and a lower rail plate The upper rail plate and the lower rail plate are fixed in the box body, and the bottom plate, the lower rail plate, the upper rail plate and the top plate divide the box into three sequentially communicating cavities, and the cavity is a rear end is a part of the rear rail assembly, wherein a cavity between the bottom plate and the lower rail plate is a first cavity, and a cavity between the upper rail plate and the top plate is a second cavity, The cavity between the lower rail plate and the upper rail plate is a main cavity, the front end of the second cavity is provided with an air inlet, and correspondingly, the rear end of the first cavity is provided with an air outlet, the fan box It is fixed on the box and is opposite to the air outlet.

The chassis according to claim 10, wherein a wind deflector fixed to the top plate or the left side plate and the right side plate is disposed between the upper rail plate and the top plate, and the air guiding plate is disposed close to The position of the rear rail assembly is such that an angle between the wind deflector and the top plate is greater than 90. .

12. The chassis according to claim 10 or 11, wherein the upper rail plate is provided with a duct isolation current sharing zone.