CN101556491B

CN101556491B - Integrative-structure desk computer and mainframe box thereof

Info

Publication number: CN101556491B
Application number: CN 200910107361
Authority: CN
Inventors: 秦彪
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-05-20
Filing date: 2009-05-20
Publication date: 2013-09-11
Anticipated expiration: 2029-05-20
Also published as: CN101556491A

Abstract

The invention provides an integrative-structure desk computer and a mainframe box thereof. A power supply (1) is shaped like a strip and arranged at the topmost end of the mainframe box; a main board (8) is arranged beneath and a peripheral interface thereof is downward; an expansion card (18) is upright, arranged in parallel to the main board and bent towards a hard disc (21), thus causing the layout of the complete machine to be compact and leading the space to be utilized effectively. The free convection principle of hot air being upward is utilized to reduce hot air circumfluence and a CPUradiation fan (10) faces to a ventilated window (12) on a back cap (9) directly, and therefore effectively improves the heat radiation of the CPU and the complete machine. A motherboard (7) made by metal plates, lateral plates (28) at two sides, a lower baffle plate (26) and an injection-molding back cover (15) form an integrative structure, thus guaranteeing the structural strength of the mainframe box. The main board can adopt the types of universal standard main boards such as ATX and the like, and the standardization of the mainframe box and the power supply can be realized.

Description

Integrative-structure desk computer and mainframe box thereof

Affiliated technical field

The present invention relates to field of personal computers, particularly display is computing machine flat, that main frame is arranged on the integrative-structure behind the display.

Background technology

After main frame is arranged on LCD (panel display), constitute the desk-top computer of integrative-structure, because whole succinct, advantage such as it is little to take up space is subjected to people's welcome.But existing one desk-top computer, because CPU and integral heat sink problem, mainboard is not universal serial mainboard (as type mainboards such as AT, ATX, DTX), most of all-in-ones adopt notebook type (movable type) CPU, thereby the performance of CPU is not high, even adopt the CPU of desktop computer, owing to be subjected to CPU heat radiation quantitative limitation, performance also can not get fully playing; Do not have the standard expansion slot on the mainboard, can not install as expansion cards such as video cards.That is to say that existing one desk-top computer, overall performance can not show a candle to split type computing machine.Also have weak point: the user can not upgrade, and installs expansion card (as video card) additional, more can not assemble computing machine voluntarily.

Summary of the invention

The present invention proposes a kind of computing machine and mainframe box thereof of integrative-structure, the special heat radiation of paying attention to CPU and complete machine, make compact integral structure, can adopt the mainboard (as type mainboards such as AT, ATX, BTX and DTX) of existing standard series, can install the expansion card (as video card) of existing standard additional, can realize standard PC case and the power supply of integrative-structure, user's integral type computing machine capable of automatic assembling.

Technical scheme of the present invention is: adopt flat display screen (as LCDs); Main frame is arranged on display screen behind, and main frame includes mainboard, power supply and hard disk; Feature of the present invention is: the elongated the top that is arranged on main frame of power supply, and the length of power supply is more than 2/3rds of main board length; Mainboard is arranged on the below of power supply, be fixed on the motherboard that sheet metal makes, the both sides of motherboard are provided with the side plate that sheet metal is made, one side of mainboard is by side plate, the next door of relative another side is provided with hard disk, the another side of hard disk is by another side plate, and hard disk directly or by accessory is fixed on the motherboard; Peripheral Interface on the mainboard down, CPU is arranged on the top of Peripheral Interface, and near side plate; Mainboard is provided with expansion slot, and is setting setting, in the there of mainboard by hard disk; Expansion card patches by knuckle switching plate and expansion slot on the mainboard or expansion card is direct and mainboard on 90 ° corner expansion slot patch, wherein have expansion card to be folded to that side of hard disk; The CPU radiator fan is axial-flow type, has the ventilation window that can directly face toward the air port of CPU radiator fan on the mainframe box bonnet.

Analyze from the heat radiation aspect, power supply is arranged on the top, and the hot-air that power supply self produces can upwards be discharged by natural convection, has eliminated the influence to other parts heat radiation in the main frame.If at power supply exhaust fan is set, as system's exhaust fan, more be conducive to the cross-ventilation in the mainframe box, discharge hot-air effectively, it is interior and influence the heat radiation of other parts to mainframe box to reduce (eliminations) hot air reflow.Hard disk and expansion card are erect and are arranged, and are convenient to Natural Heat Convection.The CPU radiator fan adopts axial-flow type, and the air port can directly suck the cold air outside the cabinet directly facing to the ventilation window of opening on the mainframe box bonnet, blows on the CPU radiated rib, is conducive to the CPU heat radiation.If the CPU radiator fan is exhaust fan, will directly be discharged cabinet by the air that CPU heats, reduce the air themperature in the main frame, be conducive to the complete machine heat radiation.The Peripheral Interface of mainboard down, for main frame bottom, can utilize the pore that has on the slit of Peripheral Interface and the lower baffle plate to be air intake opening, utilize natural convection, hot-air moves up, reduce hot air reflow and enter in the cabinet, be arranged near the chilled air cools that COMS manages and electric capacity is directly newly advanced for the CPU power supply of the top of Peripheral Interface.

The layout of the CPU of computing machine of the present invention, mainboard Peripheral Interface and expansion slot, consistent with the layout on the mainboard of AT, ATX, BTX, DTX and ITX type, thereby the mainboard in the computing machine of the present invention can adopt the mainboard of AT, ATX, BTX, DTX and ITX type, adopt these universal standard mainboards can reduce cost of development and the cycle of new product, better compatibility is arranged, be convenient to maintenance, safeguard and upgrading that the cost cost is also low.

The mainboard of ATX type has monopolized the personal desktop computer main board market substantially at present, wherein M-ATX and M-ATX narrow boards are the most universal, their size roughly is respectively 244 * 244mm and 244 * 220mm, also has the FlexATX plate (to be of a size of 228.6 * 190.5mm) in addition.19 inches display is the current main-stream display, and it is of a size of: the standard screen is roughly 400mm (wide) * 350mm (height), and widescreen is roughly 450mm (wide) * 300mm (height).Following table has been listed a kind of each component of computer power consumption inventory of high configuration, adopts the ATX reference power supply of 350w just can satisfy the requirement that this height disposes computing machine, has also comprised the power supply that display is required, and the power source special of display has also saved, and has reduced cost.

Equipment	Power consumption	Power supply distributes
			CPU	95W	12V * 8A (12V2 powers separately, 13A peak)
Mainboard	35W	3.3V×10.5A
			Memory bar	2.5W×2	3.3V×1.5A
PCI-E video card pci card	75W 10W	12V×6.2A 5V×1A+3.3V×1A
			Hard disk	10W	5V×0.7A+12V×0.5A
Mobile CD-ROM drive	5W	5V×1A
			USB device	10W×2+1.5W×10	5V×7A
Fan	3W	12V×0.3A
			Display	50W	12V×4A
Altogether	320W	12V1:11A、12V2:8A、5V:9A、3.3V:13A

The ATX reference power supply of 350w can be designed to wide for about 70mm fully, and the long 360mm that is no more than, height are the strip power supply (this is different with existing ATX reference power supply physical dimension) of 50mm.Height (244mm) when wide (70mm) of power supply adds the M-ATX mainboard and erect is roughly 314mm, and this is high suitable with 19 inches widescreen displays; The mainboard of M-ATX long (roughly 244mm) adds wide (the 100mm multiple spot) of desktop computer standard hard drive, then be that 345mm is many, and is suitable with the length of above-mentioned strip power supply, and not have to surpass the width that 19 inches standards are shielded, also wide suitable with 17 inches displays.Thereby power supply is that strip is arranged on main frame top, hard disk and mainboard side by side, below, such layout compactness, for 19 inches display, no matter standard screen or widescreen can both be kept off main frame rearward.For 17 inches display, mainboard then should adopt M-ATX narrow boards (or FlexATX plate).The length of hard disk is roughly 150mm, and is also littler than the height of ATX narrow boards, thus hard disk above or below can leave the space; If interface up, and near the setting of main frame lower end, then the top is stayed in the space, and this layout is convenient to hard disk and mainboard and the grafting of power supply line.

Expansion card patches by knuckle switching plate and expansion slot on the mainboard, or 90 ° of corner expansion slots on direct and the mainboard patch, and makes expansion card parallel with mainboard, can effectively reduce the thickness of main frame like this.Hard disk is arranged on the one side by the expansion slot of mainboard, and expansion card is folded to that side of hard disk, exceeds the long part of mainboard when expansion card is installed and just is stacked on the hard disk, thereby be fully used in the space.

The utilization factor of CD-ROM drive in computing machine just progressively descends, and now become the equipment of non-indispensability.The diameter of CD is 120mm, thereby the length and width of CD-ROM drive must be greater than 120mm, in above-mentioned layout, there has not been the space to place CD-ROM drive, CD-ROM drive can be designed to an independently external device, is connected with main frame by cable (as the USB line), can make things convenient for the user to select voluntarily so again.

For 19 inches displays, if dispose CD-ROM drive at main frame, can adopt following layout: adopt M-ATX narrow boards (or FlexATX plate), power supply is wide to be 85mm, long and M-ATX narrow boards suitable (the wide dimensional requirement that can satisfy the 350wATX reference power supply fully of 244mm length * 85mm), and CD-ROM drive is arranged on the hard disk top, with power supply side by side, the wide 85mm of power supply adds mainboard wide (the wide 220mm of M-ATX narrow boards), equals 305mm, this and 19 inches displays quite high.

It is strip that the present invention proposes power supply, and length will reach more than 2/3rds of main board length, and its reason is: make as far as possible and arrange compactly in the mainframe box behind the display screen, being fully used in the inner space, reduces the especially size of short transverse.Lengthen power supply, just reduced the width (size of mainframe box short transverse just) of power supply naturally.The no CD drive design of employing set forth above M-ATX mainboard, the length of power supply be mainboard long add again hard disk wide more than.The design of being furnished with CD-ROM drive: adopt the M-ATX narrow boards, the length of power supply and mainboard long consistent is among the embodiment afterwards, with clearer this point that illustrates.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Feature profile synoptic diagram when Fig. 1 stands in table top for a kind of computing machine of the present invention.

Fig. 2 is the rear view that a kind of computing machine of the present invention is removed bonnet, shows the layout of each critical piece in the main frame, is not with CD-ROM drive in this main frame.

Fig. 3 is the rear view that a kind of computing machine of the present invention is opened bonnet, is provided with CD-ROM drive in the main frame, and knuckle switching plate has lengthened.

Fig. 4 is the rear view that a kind of computing machine of the present invention is opened bonnet, is the expansion of computing machine shown in Figure 3, and three expansion cards are installed.

Fig. 5 is the cut-open view at A-A place among Fig. 4.

Fig. 6 is the rear view that a kind of computer host box of the present invention is opened bonnet, disposes HDDbox.

Fig. 7 is the cut-open view at B-B place among Fig. 6.

Fig. 8 is a kind of mainframe box of computing machine of the present invention, and the rear view that bonnet is opened is provided with two-layer expansion card panel window.

Fig. 9 is a kind of mainframe box of computing machine of the present invention, and the rear view that bonnet is opened does not dispose HDDbox.

Figure 10 is a kind of mainframe box of computing machine of the present invention, and the rear view that bonnet is opened is the expansion of mainframe box shown in Figure 9, has increased one deck expansion card panel window.

Among the figure, 1, power supply, 2, display screen, 3, CPU, 4, fore shell, 5, bracing or strutting arrangement, 6, Peripheral Interface, 7, motherboard, 8, mainboard, 9, bonnet, 10, the CPU radiator fan, 11, the arrow that the expression air flows, 12, ventilation window, 13, blow vent, 14, exhaust fan, 15, back cover, 16, expansion slot, 17, knuckle switching plate, 18, expansion card, 19, the outlet of power supply output cable, 20, the display driver plate, 21, hard disk, 22, the hard disk standing finish, 23, reinforcement, 24, the panel standing finish, 25, the expansion card panel, 26, lower baffle plate, 27, CD-ROM drive, 28, side plate, 29, screw, 30, HDDbox, 31, chute, 32, panel window, 33, the Peripheral Interface window.

Embodiment

Fig. 1 shows the critical piece of computing machine of the present invention: fore shell 4, back cover 15, bonnet 9, bracing or strutting arrangement 5, flat display screen 2, power supply 1, motherboard 7, CPU3, CPU radiator fan 10.Motherboard 7 is main load-carrying member in the main frame, and mainboard, hard disk and CD-ROM drive all will be fixed on the motherboard, thereby should adopt sheet metal to make.Power supply 1 is (also being the top of main frame) above mainboard 8.Power supply 1 is provided with exhaust fan 14, and as system's exhaust fan, exhaust fan 14 is discharged the hot-air in the main frame by blow vent 13, reduces air themperature in the main frame, strengthens convection heat transfer in the main frame, also power supply 1 is played thermolysis.CPU3 is arranged on the top of the Peripheral Interface 6 of mainboard 8, CPU radiator fan 10 is tubeaxial fan, and the air port of fan can directly suck by the air (cold air) that cabinet is outer directly facing to the ventilation window 12 on the bonnet 9, blow on the CPU radiating fin, thereby the CPU radiating effect is best.CPU radiator fan 10 also can be the axial-flow type air ejector fan, directly will be discharged cabinet by CPU radiated rib heated hot air heated, and can effectively reduce the air themperature in the main frame, further improve the cross-ventilation in the main frame, not only be conducive to the CPU heat radiation, also help the complete machine heat radiation.

Regulate the visual angle of display for the ease of the user, bracing or strutting arrangement adopts the visual angle adjustable mechanism, and being connected by rotating shaft of the bracing or strutting arrangement 5 among Fig. 1 and main frame, such syndeton can be regulated the last downwards angle of visibility of display screen.Switch, pilot lamp and the interface (as the USB mouth) of main frame can be arranged on the front of fore shell 4, be convenient to user's operation.

Fig. 2 shows the layout of the critical piece in a kind of main frame of the present invention.CD-ROM drive is not set in the main frame, and power supply 1 has shell, the shell that generally adopts sheet metal to make, play electromagnetic shielding action, power supply is strip, is arranged on the top of mainframe box, length is consistent with the inner width of mainframe box, is provided with two exhaust fans 14, and with main frame in the blow vent 13 that communicates.Designing power supply is convenient to formulate the power standard of integrative-structure computing machine like this, and then is convenient to formulate integrative-structure computer host box standard.Shown in the figure: CPU is arranged on the top of mainboard Peripheral Interface 6, and an expansion card 18 only is housed; Expansion card 18 is plugged on the slot the inside on the knuckle switching plate 17, and knuckle switching plate 17 is plugged on the expansion slot 16 on the mainboard again, and expansion card 18 is parallel with mainboard 8, and expansion card panel 25 and Peripheral Interface 6 are side by side and all down.

Mainframe box lower end among Fig. 2 is provided with lower baffle plate 26, for counterchecking electromagnetic wave leaks outside, generally adopts sheet metal to make, and lower baffle plate 26 has the Peripheral Interface window of mainboard and the panel window of expansion card.The Peripheral Interface window of mainboard also should be provided with the window catch that sheet metal that counterchecking electromagnetic wave leaks outside is made, and this window catch is not shown among the figure.Lower baffle plate 26 is provided with reinforcement 23, increases the intensity of lower baffle plate, and cooperates the panel standing finish 24 of expansion card, and expansion card panel 25 is effectively fixing, and it is firm to reach expansion card.Adopting such extension card fixing structure, is expansion card and computing machine compatibility of the present invention for the ease of existing standard, and the expansion card 18 shown in the figure is exactly to show standard card.

Fig. 2 illustrates: hard disk 21 is arranged on the one side by expansion slot 16, and by the lower end of main frame, hard disk 21 is to be fixed on the motherboard 7 by hard disk standing finish 22, expansion card 18 is folded to that side of hard disk 21, leave the space between hard disk 21 and the power supply 1, display driver circuit plate 20 can be positioned over this, the output cable of power supply 1 is very many, power supply output cable outlet 19 also is arranged on here, is convenient to the cable discharging like this.The M-ATX mainboard is adopted in design shown in Figure 2, and display screen is 19 inches widescreens, and power supply is of a size of 360 * 70 * 53 (mm), and desk-top hard disk does not dispose CD-ROM drive, from shown in the figure as can be seen, layout is very compact, and easy for installation.

Computing machine of the present invention shown in Figure 3, be provided with CD-ROM drive, CD-ROM drive 27 is arranged on hard disk 21 tops, by the upper end of main frame, with power supply 1 flat raft, mainboard 8 adopts the M-ATX narrow boards, power supply 1 band metal shell, and be provided with an exhaust fan 14, compare with the power supply among Fig. 2, length reduces, but width once added, and can reach same power output (more than the 350W).For reducing size, gauge particularly, CD-ROM drive adopts mobile CD-ROM drive.Leave the space between CD-ROM drive 27 and back clamshell, display driver circuit can be arranged at this, also be provided with exhaust fan 14 on the clamshell, as system's exhaust fan, increase the heat loss through convection of complete machine.Clearly show that among Fig. 3 that hard disk 21 is near the lower end of mainframe box.The interface of hard disk leaves the space above the hard disk up, facilitates hard disk and power supply and mainboard line like this and pegs graft, and the output lead of power supply is also drawn from the power supply shell near this.Different among the knuckle of the expansion card 18 among Fig. 3 switching plate 17 and Fig. 2, lengthened, can will be divided into two spaces in the main frame like this, reduce the hot-air that expansion card and hard disk produce and enter cpu heat, be conducive to CPU and dispel the heat.Also illustrate among the figure, bonnet 9 has ventilation window 12, faces CPU radiator fan 10, the position of CPU radiator fan 10 (position of CPU just) on mainboard near the there of side plate 28.

Computing machine of the present invention shown in Figure 4 is the expansion of computing machine shown in Figure 3, has increased one deck expansion card panel window, and three expansion cards 18 are installed altogether.Compare with Fig. 3, just increase one deck expansion card panel window, changed bonnet 9, three expansion cards 18 just can be installed.The expansion card panel window that increases is superimposed upon on the former reinforcement 23 and constitutes, and the expansion card that adopts also is existing standard card.

Fig. 5 illustrates again further, the layout of the position of hard disk and three expansion cards.Hard disk 21 smooth being fixed on the motherboard 7, the both sides of motherboard 7 are upright side plate 28, generally adopts sheet metal, and the one, for counterchecking electromagnetic wave, the 2nd, the strength structure requirement.One side of mainboard 8 is by side plate, and hard disk 21 is by another side plate.Two expansion cards 18 are folded to hard disk 21 those sides, and the part that exceeds mainboard 8 length is stacked on the hard disk 21, and the space is utilized effectively like this.

Computing machine of the present invention shown in Fig. 2,3,4, bonnet 9 does not hide power supply 1, and power supply 1 directly exposes, and such design has reduced the size of bonnet 9, is convenient to the standardization of power supply 1.Certainly also bonnet 9 can be designed to cover power supply 1, outward appearance can improve.Also have in addition: bonnet 9 is divided into two parts with back cover 15, and bonnet 9 can conveniently be opened, and is convenient to I﹠ M like this, but bonnet 9 is difficult for as load-carrying member.Show display if realize picture, the strong point of complete machine is provided with bonnet, bonnet and back cover (or parts back cover) must be designed to integrative-structure.

Fig. 6 shows a kind of mainframe box of computing machine of the present invention, and mainframe box and display are integral structure, and critical piece includes: the side plate 28 of display screen, fore shell 4, back cover 15, bonnet 9, motherboard 7, both sides and lower baffle plate 26.Have ventilation window 12 on the bonnet 9, bonnet 9 must have the effect of shielding electromagnetic wave outside radiation, thereby bonnet generally adopts sheet metal to make, or the plastics of band screen layer are made.Mainframe box shown in Figure 6 is provided with HDDbox 30, has only the panel window 32 of an expansion card, and arranged side by side with the Peripheral Interface window 33 of mainframe box, and all is opened on the lower baffle plate 26 of mainframe box, and lower baffle plate 26 is provided with reinforcement 23.Panel standing finish 24 is connected and fixed by screw (or clip) and lower baffle plate 26 and reinforcement 23.Panel window 32 has two panel standing finishes 24, can the two ends of expansion card panel are fixing simultaneously, make expansion card panel (and expansion card) firm stable more.A plurality of expansion slots are arranged on the mainboard, select suitable expansion slot to be attached thereto for making things convenient for expansion card, the position of panel standing finish on panel window should be designed to and can regulate.The standing finish of panel shown in Fig. 6 24 can slide in the chute 31 that lower baffle plate 26 is offered, and adjusts the position, adopts screw to fix again.

Back cover adopts the injection molding process manufacturing, and is handsome in appearance, the efficient height, and cost is low.Separately back cover and motherboard intensity are low, are the structural strength that guarantees mainframe box, the side plate of back cover, motherboard, both sides and lower baffle plate should be connected and fixed into a single integrated structurely, form the superior framed structure of structural strength.Concrete measure has: the side plate of motherboard, both sides and lower baffle plate are that same sheet metal is processed into, or be connected and fixed into a single integrated structure by welding or riveted joint or screw, reinforcement is set on the lower baffle plate, increases the intensity of lower baffle plate, be convenient to the fixing of panel standing finish again; Back cover is fixedlyed connected with the side plate of both sides by screw or rivet, makes back cover and motherboard etc. become one structure, and mainframe box shown in Figure 6 has just adopted this structure, has the many screws 29 of number fixing with back cover 15 on the side plate 28.If the length of motherboard exceeds the side plate of both sides, then also can adopt part that motherboard exceeds side plate directly to fixedly connected the structure that is integral with back cover with screw or rivet or snapping.Back cover and motherboard etc. constitute well-set mainframe box body, bear the weight of all parts of computing machine, and bonnet can be opened at any time easily, is conducive to the assembling of computing machine, make things convenient for user oneself assembling computing machine or expansion computing machine.

Fig. 7 is the cross section view of B-B among Fig. 6, and the side plate 28 of both sides is close to the internal face of back cover 15, can adopt screw that side plate 28 and the inwall of back cover 15 are fixed.HDDbox 30 is fixedlyed connected with motherboard 7, HDDbox 30 is fixedlyed connected with back cover 15 again, has strengthened fixedlying connected of motherboard 7 and back cover 15 so again.Display screen 2 adopts screw (or snapping) to fixedly connected with back cover 15, and fore shell 4 is buckled on the back cover 15.Display screen 2 is fixed into integrative-structure with back cover 15, further improves the structural strength of whole cabinet again.

Computer host box of the present invention shown in Figure 8 is expansion shown in Figure 6, has changed bonnet 9, and the panel window at reinforcement 23 increase one deck expansion cards has just increased by two panel windows.The panel window of the second layer (increase) expansion card is to be superimposed upon on ground floor (on the lower baffle plate) panel window.Shown in the figure, second layer panel window adopts screw to be fixed on formation on the reinforcement 23, also can adopt snapping fixedly connected.Panel standing finish 24 on the panel window of the second layer also can be regulated position, the left and right sides along chute 31, is convenient to expansion card and selects suitable expansion slot.

The function of computer motherboard and chipset is very complete at present, generally only installs video card additional, and the situation that three above expansion cards are installed simultaneously is few.Consider that cabinet can not be too thick, the panel window not more than two layers of computing machine of the present invention and mainframe box.

Computer host box shown in Figure 9 does not dispose HDDbox in the cabinet, Figure 10 is the expansion of Fig. 9, has changed bonnet, has increased one deck panel window.

Hard disk of the present invention includes mechanical hard disk and solid state hard disc.

Claims

1. desk-top computer, main frame is arranged on flat display screen (2) behind, main frame includes mainboard (8), power supply (1) and hard disk (21), it is characterized in that: the elongated upper end that is arranged on main frame of power supply (1), and power supply length is more than 2/3rds of main board length; Mainboard (8) is arranged on the below of power supply (1), is fixed on the motherboard (7) that sheet metal makes; The both sides of motherboard (7) are provided with the side plate (28) that sheet metal is made, one side of mainboard (8) is by side plate, the other hard disk (21) that is provided with of relative another side, the another side of hard disk (21) is by another side plate, and hard disk (21) directly or by accessory is fixed on the motherboard (7); Peripheral Interface on the mainboard (6) down, CPU (3) is arranged on the top of Peripheral Interface (6), and near side plate; Expansion slot (16) is at mainboard (8) erects setting, and leans on the there of hard disk (21); Expansion card (18) patch by knuckle switching plate (17) and expansion slot (16) on the mainboard (8) or expansion card directly and 90 ° of corner expansion slots on the mainboard patch, wherein have expansion card to be folded to that side of hard disk; CPU radiator fan (10) is axial-flow type, has the ventilation window (12) that can directly face toward the air port of CPU radiator fan on the bonnet (9).

2. desk-top computer according to claim 1, it is characterized in that: mainboard (8) is ATX type mainboard or BTX type mainboard or DTX type mainboard or ITX type mainboard.

3. desk-top computer according to claim 2 is characterized in that: power supply (1) band metal shell, and be provided with exhaust fan (14), and with main frame in the blow vent (13) that communicates.

4. desk-top computer according to claim 2 is characterized in that: CD-ROM drive is not set in the main frame; Power supply (1) length is long greater than mainboard (8), and hard disk (21) is arranged on by the main frame lower end, and the interface of hard disk (21) up.

5. desk-top computer according to claim 2, it is characterized in that: CD-ROM drive (27) is arranged on the top of hard disk (21), by the upper end of main frame, with power supply (1) side by side, and adopt mobile CD-ROM drive.

6. desk-top computer according to claim 5, it is characterized in that: the clamshell of CD-ROM drive (27) position is provided with exhaust fan.

7. mainframe box that is used for any one described desk-top computer of claim 1 to 6, mainframe box and display are integral structure, it is characterized in that: back cover (15) is injection molding plastic components, and bonnet (9) is two parts that separate with back cover (15); The side plate (28) of motherboard (7), both sides and lower baffle plate (26) are that same sheet metal constitutes, or are connected and fixed into a single integrated structure by welding or riveted joint or screw; The side plate of both sides (28) is fixed into integrative-structure by screw or rivet and back cover (15), or the length of motherboard (7) exceeds side plate (28), and back cover (15) and motherboard (7) exceed the part of side plate, is fixed into integrative-structure by screw or rivet or snapping; Lower baffle plate (26) is provided with the panel window (32) of mainboard Peripheral Interface window (33) and at least one expansion card, the panel window not more than two layers of expansion card, and lower baffle plate (26) is provided with reinforcement (23); Have ventilation window (12) on the bonnet (9), adopt the plastics of sheet metal or band screen layer to make.

8. mainframe box according to claim 7, it is characterized in that: panel window (32) is provided with panel standing finish (24), and the position of panel standing finish (24) on panel window (32) can left and right adjusting.

9. mainframe box according to claim 7 is characterized in that: display screen (2) is fixedlyed connected into a single integrated structure by screw or snapping with back cover (15).