CN101923886B - Digital video recorder case - Google Patents

Abstract

The invention provides a digital video recorder case, which comprises a case body and a front panel. A power supply, a mainboard and a hardware array are arranged inside the case body; and a case cooling fan is arranged on a side part of the case. The digital video recorder case is characterized in that the power supply is provided with an independent cooling air duct. Because the power supply is provided with the independent cooling air duct, and a low-noise case fan is adopted, the DVR case has the advantages of high cooling efficiency and low noise.

Description

Chassis for digital video recorders

technical field

The present invention relates to DVR (Digital Video Recorder, digital video recorder) chassis, relate in particular to a kind of DVR chassis with independent power cooling air duct

Background technique

DVR, also known as digital hard disk video recorder, is a computer system for image storage and processing. It has the functions of long-term video recording, audio recording, remote monitoring and control of images or voices. DVR integrates five functions of video recorder, screen splitter, PTZ lens control, alarm control, network transmission, etc., and also has an advantage in price. The hardware of the DVR is mainly composed of CPU, memory, motherboard, graphics card, video capture card, chassis, power supply, hard disk and connecting cables.

The current structure of the DVR case is shown in FIG. 1 . FIG. 1 mainly shows the disassembly structure of the DVR case, including a case upper cover 110 and a case body 120 . The main board 121, the power supply 122 and the hard disk array 123 are arranged inside the case, meanwhile, these three parts are also the main heat sources in the case. The side of the case is also provided with a cooling fan 124 for sucking the hot air in the case out of the case.

The inventor found in the process of researching the prior art that the main board, the power supply and the hard disk array in the existing DVR case are in the same heat dissipation air duct, and the heat emitted from each other affects each other. Moreover, the power supply itself also has a separate heat dissipation fan, which sucks the airflow in the chassis and interferes with the heat dissipation airflow caused by the heat dissipation fan of the chassis itself, thus affecting the overall heat dissipation efficiency in the chassis.

Contents of the invention

The purpose of this invention is to provide a kind of DVR case, its power supply has independent cooling air duct.

According to one aspect of the present invention, a kind of DVR case is provided, including case body and front panel, power supply, main board and hard disk array are arranged inside the case body, and case cooling fan is provided on the side of the case, it is characterized in that, The power supply has a separate cooling air duct.

In one embodiment, a windshield is arranged around the power supply, and the windshield isolates the power supply from other parts inside the chassis to form an independent cooling space.

In one embodiment, the independent cooling space has ventilation holes communicating with the outside of the chassis.

In one embodiment, the ventilation hole is a hexagonal honeycomb ventilation hole array.

In one embodiment, the air flow enters the independent heat dissipation space through the ventilation holes, and is exhausted to the surrounding environment through the fan of the power supply.

In one embodiment, the windshield has a cable channel, and a cable retaining ring is provided around the cable channel.

In one embodiment, a ventilation slot is provided on the front panel, through which the airflow enters the inside of the case, passes through the hard disk array and the main board in turn, and is finally exhausted to the surrounding environment by the cooling fan of the case.

In one embodiment, the chassis cooling fan is a low-noise fan, preferably two low-noise fans.

In an embodiment, the hard disk array further includes a recorder.

According to another aspect of the present invention, a digital video recorder is also provided, including the aforementioned DVR chassis.

Description of drawings

Fig. 1 is the structural representation of the DVR cabinet of prior art, and this cabinet interior has integral cooling air duct;

Fig. 2 is the overall perspective view of DVR cabinet according to the present invention;

Fig. 3A is a schematic perspective view of the structure of the DVR chassis according to the present invention, for clarity, the chassis upper cover is omitted;

Fig. 3B is a schematic structural top view of the DVR chassis of Fig. 3A, showing two cooling air ducts independent of each other;

Fig. 3 C is the front view of DVR chassis according to the present invention;

Fig. 3D is the left side view of DVR chassis according to the present invention;

Figure 3E is a right side view of the DVR chassis according to the present invention;

Figure 3F is a rear side view of a DVR chassis according to the present invention;

Fig. 4 is a schematic structural perspective view of a DVR chassis according to the present invention, including a recorder.

Detailed ways

Referring to FIG. 2, a DVR chassis 200 according to an embodiment of the present invention is shown. The DVR case 200 includes a front panel 210 and a case body 220 .

As shown in FIGS. 3A and 3B , a hard disk array 230 , a motherboard 240 , a power supply 250 and a cooling fan 260 for the chassis are arranged inside the chassis 200 . The hard disk array 230 is arranged inside the chassis 200 close to the front panel 210, and the hard disk array 230 includes a plurality of hard disks, for example, 8 pieces. The motherboard 240 is disposed in the chassis 200 near the rear of the chassis. The main board 240 is connected with functional modules such as CPU, memory, video card and interface circuits. The power supply 250 provides the required electric energy for the DVR, and it is arranged in the cabinet near the rear. Usually, the power supply 250 has a separate power cooling fan, and the fan is located in the chassis 200 near the back of the chassis.

As shown in FIG. 3E , a chassis cooling fan 260 is provided on one side of the chassis 200 . The chassis cooling fan is a low-speed large-diameter axial-flow fan with low operating noise and large air volume. In order to further enhance the heat dissipation effect, multiple fans, such as two fans, may be provided. As shown in FIG. 3E , a corresponding ventilation hole 2601 may be provided at a position corresponding to the fan 260 on the side of the chassis. The ventilation hole 2601 can be a hexagonal honeycomb ventilation hole array, so as to increase the ventilation volume and maintain the electromagnetic shielding in the chassis 200 .

Here, a high-speed fan is generally used in the prior art. However, high-speed fans are noisy in operation. Using two low-speed and large-diameter axial flow fans instead of one high-speed fan can not only meet the air volume requirements, but also reduce noise.

The cooling air duct of the power supply 250 in the case 200 will be described below.

Referring to FIG. 3F , the power supply 250 has its own cooling fan 2501 , which sucks and discharges the airflow in the chassis. But on the other hand, the chassis cooling fan 260 provided on the side of the chassis 200 sucks and discharges the airflow during operation. Therefore, in order to prevent the two airflows caused by the cooling fan 2501 of the power supply and the cooling fan 260 of the chassis from interfering with each other, in an embodiment of the present invention, the power supply 250 has an independent cooling air duct. As shown in FIG. 3B , two different types of arrows respectively indicate the running routes of the airflow in the two isolated air ducts. The arrow with a triangle is the airflow in the cooling air duct of the power supply 250 .

In one embodiment, a windshield 270 is arranged around the power supply 250, and the windshield 270 isolates the power supply 250 from other parts inside the chassis to form an independent cooling space. In order to allow the airflow to enter the heat dissipation space, a ventilation hole 280 ( FIG. 3D ) is provided on the side of the chassis, and the ventilation hole 280 makes the independent heat dissipation space of the power supply 250 communicate with the outside of the chassis. In order to increase the ventilation volume while maintaining good electromagnetic shielding in the case, the ventilation holes 280 are preferably arranged as a hexagonal honeycomb ventilation hole array. Under the suction effect of the fan 2501, the airflow enters the independent heat dissipation space from the ventilation hole 280, and finally is exhausted from the heat dissipation fan 2501 of the power supply 250 to the surrounding environment. During this process, the power supply 250 is cooled.

In order to guide the airflow in the independent heat dissipation space of the power supply 250 , as shown in FIGS. 3A and 3B , the windshield 270 is a bent two-section flat plate structure, which is arranged perpendicular to the bottom surface of the chassis 200 . One end of the wind deflector 270 is connected to the side wall of the cabinet having the ventilation hole 280, and the other end is connected to the back side of the cabinet. Thus, the guide surface 2703 ( FIG. 3B ) of the windshield 270 makes the airflow entering from the ventilation hole 280 at the side of the cabinet 200 divert to the power supply 250 at the rear of the cabinet 200 , and the windshield 270 makes the surroundings of the power supply 250 to form a connection with the chassis. Independent heat dissipation space isolated from other internal parts.

In order to connect the lines of the power supply 250 to other parts in the case, the windshield 270 is provided with a cable channel 2701 . The upper part of the cable channel 2701 is set in an open form to facilitate the entry of cables. Usually, the windshield 270 is a metal sheet metal part. In order to prevent the sharp edge of the cable passage 2701 from damaging the cables, a cable retainer 2702 is provided around the cable passage 2701, and the retainer is made of plastic, for example. The upper opening of the cable retainer 2702 can be provided with elastic retaining strips, so that the cables can be pressed into the cable channel 2701 or taken out from the cable channel 2701 through the elastic retaining bars, without threading operation during the connection process.

The heat dissipation air ducts of the hard disk array 230 and the motherboard 240 in the case 200 will be described below.

The front panel 210 of the chassis 200 is provided with a plurality of ventilation slots 2101 , which communicate the interior of the chassis with the surrounding atmosphere. The arrangement of the ventilation slots 2101 is to set as many ventilation slots as possible without affecting other components on the front panel, so as to increase the ventilation volume.

Referring to FIG. 3B , the arrow lines without triangles schematically indicate the flow direction of the cooling air ducts of the hard disk array 230 and the motherboard 240 .

When the cooling fan 260 of the chassis is working, the airflow enters the interior of the chassis through the ventilation slot 2101 on the front panel, and moves toward the fan 260 . The hard disk array 230 and the motherboard 240 etc. on the airflow channel are cooled by the airflow sequentially.

Therefore, the heat dissipation air duct of the power supply 250 and the heat dissipation air duct of the hard disk motherboard are independent of each other, which avoids the reduction of heat dissipation efficiency and the increase of noise caused by mutual interference of air flow. At the same time, when the metal windshield 270 is provided, the electromagnetic interference of the power supply 250 to other electronic components in the chassis 200 is avoided, and the reliability of the system is enhanced.

As shown in FIG. 4, a recorder 230' may be included in the position of the hard disk array 230. The recorder 230' can be arranged at the front of the chassis 200 near the front panel 210 by replacing part of the hard disk. The heat dissipation of the recorder 230' is the same as that of the hard disk array 230, and will not be described in detail here.

The features of the present invention described above can be used alone or in combination, which are described in the form of examples and do not constitute a limitation to the scope of the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (7)

1. a DVR cabinet, comprises box body and front panel, and box body inside is provided with power supply, mainboard and hard disk array, described cabinet is provided with case radiation fan at sidepiece, and this case radiation fan is low-speed big-diameter tubeaxial fan, wherein, described power supply has independent heat dissipation wind channel

Wherein, deep bead is provided with around described power supply, this deep bead is kept apart the other parts of power supply and cabinet inside and is formed independently heat-dissipating space, described independently heat-dissipating space has the air vent communicated with cabinet outside, thus air-flow enter through described air vent described in independently heat-dissipating space, and be discharged to surrounding environment by the fan of described power supply, and

Wherein, described front panel is provided with ventilation slot, air-flow enters cabinet inside through this ventilation slot, and successively through hard disk array and mainboard, is finally discharged to surrounding environment by case radiation fan.

2. DVR cabinet as claimed in claim 1, wherein, described air vent is the hexagonal honeycomb shape air vent array being arranged on box body sidepiece.

3. DVR cabinet as claimed in claim 1, wherein, described deep bead has cable passage, and the periphery of this cable passage is provided with cable guard ring.

4. DVR cabinet as claimed in claim 1, wherein, described case radiation fan is low-noise fan.

5. DVR cabinet according to claim 1, wherein, described case radiation fan is two.

6. DVR cabinet as claimed in claim 1, wherein, described hard disk array also comprises CD writer.

7. a digital video recorder, comprises the DVR cabinet described in aforementioned any one of claim.