CN105276783A - Air volume balance damping plate for central air conditioner air pipes - Google Patents

Abstract

The invention discloses an air volume balance damping plate for central air conditioner air pipes. The air volume balance damping plate basically comprises a fixed damping plate body (1), a movable damping plate body (2), a cover plate (3), rivets (4), outer hexagon bolts (5) and nuts (6). The fixed damping plate and the cover plate are connected through the outer hexagon bolts and the nuts, a cavity is formed between the fixed damping plate body and the cover plate, the movable damping plate body is embedded into the cavity between the fixed damping plate body and the cover plate, the movable damping plate body can move leftwards and rightwards in the cavity, and positioning is achieved through positioning holes in the movable damping plate body and the fixed damping plate body. The air volume of the damping plate is adjusted by adjusting different aperture ratios of the damping plate, and therefore the purpose of air volume balance between various branch air pipes in practical engineering is achieved.

Description

Wind pipe of central air-conditioning air balance damping sheet

Technical field

The present invention relates to air-conditioning wind-force to regulate, specifically a kind of wind pipe of central air-conditioning air balance damping sheet.

Background technology

At present because large-scale civil buildings design central air conditioner room area, quantity are often restricted, the area that air-conditioning system is born is very large, the airduct fed distance of system is long, conveying radius is large, thus will inevitably produce the serious unbalanced problem of far away, near each branch road resistance.After the form of air-line system, line size are determined, under the Action of Wind pressure of blower fan, the air quantity of each branch road distributes automatically by resistance balance rule.If each branch road resistance is without EQUILIBRIUM CALCULATION FOR PROCESS when engineering design, system actual air volume and different design can be caused.Specification regulation airduct each loop should be less than 15% in design air flow downforce loss difference.Therefore, when above-mentioned requirements still cannot be reached by Reasonable adjustment airduct basal area, just should volume adjusting apparatus be set.Air quantity regulates conventional method to have following several: 1) air-valve regulates, and 2) guide vane adjustment, 3) determine volume damper.Although said method can solve the problem of air balance, cost compare is high, and the uniformity of air outlet is poor.So be necessary that exploitation one is practical more economically, easy to adjust, the uniform volume adjusting apparatus of air quantity, the air balance problem in Practical Project between each branch wind pipe can be solved.

Summary of the invention

The present invention discloses a kind of wind pipe of central air-conditioning air balance damping sheet, and its basic comprising comprises 1) fixing damping sheet, 2) active damping plate, 3) cover plate, 4) rivet, 5) outer-hexagonal bolt, 6) nut composition.Fixing damping sheet is connected by outer-hexagonal bolt, nut with cover plate, a cavity is formed between stable equilibrium plate and cover plate, active damping plate is embedded in the cavity between fixing damping sheet and cover plate, active damping plate can move left and right in cavity, utilizes the locating hole on active damping plate and fixing damping sheet to locate.By the percent opening that damping adjusting plate is different, regulate the air quantity by damping sheet, thus solve the air balance problem in Practical Project between each branch wind pipe.

Preferably, described fixing damping sheet and active damping plate are uniformly distributed φ 8mm damping hole, are regulated the object of air balance and current-sharing by balance pipe.

Preferably, described active damping plate can move left and right, and is provided with the locating hole of corresponding percent opening, by changing the magnitude of misalignment of fixing damping sheet and active damping plate hole, regulates the object of air balance.

The more existing control valve of the present invention, determine air quantity valve, guide vane etc. and control the method for air quantity, have that structure is simple, installation method, low price, air quantity and temperature are controlled more even, and the advantage such as noise is little.

Accompanying drawing explanation

Fig. 1 is the structural representation of wind pipe of central air-conditioning air balance damping sheet of the present invention.

Fig. 2 is the air balance schematic diagram of wind pipe of central air-conditioning air balance damping sheet of the present invention.

Fig. 3 is the fixing damping sheet location hole pattern of wind pipe of central air-conditioning air balance damping sheet of the present invention.

Fig. 4 is the active damping plate location hole pattern of wind pipe of central air-conditioning air balance damping sheet of the present invention.

Fig. 5 is wind pipe of central air-conditioning air balance damping sheet positioning principle figure of the present invention.

Fig. 6 is wind pipe of central air-conditioning air balance damping sheet resistance coefficient table of the present invention.

Detailed description of the invention

Present pre-ferred embodiments is provided, to describe technical scheme of the present invention in detail below in conjunction with accompanying drawing.

The present invention discloses a kind of air quantity of central air conditioner balance damping sheet, and its basic comprising comprises fixing damping sheet 1, active damping plate 2, cover plate 3, rivet 4, outer-hexagonal bolt 5 and nut 6.Fixing damping sheet 1 is connected with nut 6 by outer-hexagonal bolt 5 with cover plate 3, a cavity is formed between fixing damping sheet 1 and cover plate 3, in the cavity of active damping plate 2 between fixing damping sheet 1 and cover plate 3, utilize the locating hole on active damping plate 1 and fixing damping sheet 2 to locate, the diverse location of locating hole can move left and right in cavity by active damping plate.Regulate the air quantity by damping sheet by the percent opening that damping adjusting plate is different simultaneously, thus solve the air balance problem in Practical Project between each branch wind pipe.

First, air balance principle of the present invention is introduced.By in ventilating system, higher level's branch wind pipe arranges air quantity damping sheet, improve higher level's branch wind pipe exhaust resistance, thus the branch wind pipe making fed distance longer provides enough blast and air quantity.As shown in Figure 2, this wind pipe of central air-conditioning air balance damping sheet can be directly installed between the flange that airduct is connected with airduct, and the air inlet of arm A, B distance house steward is nearest, thus blast and air quantity maximum, be followed successively by arm C, D, the distance of arm E, F distance house steward air inlet farthest.When air supplying distance difference is larger time, may there is the requirement not reaching actual use in the blast of arm E, F and air quantity.Be necessary this time at arm A, B, the air balance plate of different percent opening is installed at arm C, D place, limits its air quantity, improves the blast of air supply duct, makes arm E, F obtain suitable air quantity, thus realize the air balance problem in engineering between each branch wind pipe.

Secondly, the damping hole of uniform φ 8mm on described fixing damping sheet 1 and active damping plate 2, damping hole be positive triangle layout, and percent opening is about 50%.By arrange air quantity damping sheet in system airduct after, wind, from the damping hole process damping sheet, can make the air in branch wind pipe fully mix, and makes the temperature of each level in airduct more even.Simultaneously after damping sheet, on airduct cross section, the wind speed of each point is relatively even, makes the air of air conditioning terminal more all even comfortable.On the contrary current in order to balance air quantity use control valve and determine air quantity valve, control air quantity and blast by changing blade angle, under the guiding of blade, wind is also laminar flow in airduct, air quantity is concentrated, on same cross section the wind speed of each point and temperature very uneven.In addition, prove through experiment, because wind makes distinguished and admirable more evenly with steady, so noise is also smaller through damping hole.5 ~ 15db (A) less of the noise under the same terms during adjustment in use valve, enables user obtain more comfortable environment.

3rd, active damping plate 2 of the present invention can move left and right.As shown in Figure 3, Figure 4, uniform φ 8mm first damping hole 11 on fixing damping sheet 1; Uniform φ 8mm second damping hole 13 on active damping plate 2, the φ 8mm damping hole of active damping plate 2 both when mobile initial position is overlapped, is at this moment the maximum percent opening of damping sheet.As shown in Figure 5, if mobile active damping plate makes φ 8mm damping hole misplace, wind can only pass through from the hole of shaded area, changes the percent opening of damping sheet, installs and uses in the airduct that such same damping sheet can require in different damping.In order to make adjustment convenient and accurate, we add locating hole on damping sheet.As shown in Figure 3, Figure 4, active damping plate there is the activity orientation hole 14 that a row tilts in the stationary positioned hole 12 that fixing damping sheet has a row vertical.We can select from active damping plate 2 position, hole needing percent opening, riveted, can obtain the damping sheet of required percent opening by quilting rivet and fixing damping sheet 1.How to determine in order to convenient user and select different percent openings, when the balancing resistance of branch wind pipe needs to adjust time, client can according to the damping sheet resistance coefficient table shown in Fig. 6, balancing resistance required for airduct branch road and the wind speed in airduct, directly find the percent opening of required damping sheet from chart.Such as: airduct wind speed 5m/s, the percent opening of damping sheet how is selected when wishing to obtain 100Pa balancing resistance? by tabling look-up, the balancing resistance coefficient that diagram A point 100Pa-5m/s wind speed is corresponding is 6.5, B point is found by resistance coefficient 6.5, then find required percent opening about 27%, the locating hole of on active damping plate 27% can be selected to position riveted joint.

The percent opening of damping sheet of the present invention is except can searching with above-mentioned chart, we also experimentally data fitting gone out corresponding computing formula, directly can calculate the percent opening of required damping sheet when the resistance of known airduct wind speed and required damping sheet, further facilitate user and use and select.Computing formula is as follows:

$K=\frac{70}{\sqrt{\frac{\mathrm{\Δ}H}{\frac{\mathrm{\ρ}}{2\×g}\×10\×V^2}}}$

K---percent opening (percent opening=perforate net area ÷ duct cross-section amasss, unit: %)

△ H---balancing resistance (wishing the local resistance obtained after namely damping sheet is set, unit Pa)

V---air velocity (flow velocity of wind inner air tube, unit: m/s)

G---acceleration of gravity (gets 9.8, unit: m/s ²)

ρ---atmospheric density (gets 1.2, unit: kg/m ³)

How example: airduct wind speed 5m/s, select the percent opening of damping sheet when iting is desirable to obtain 100Pa balancing resistance? wind speed 5m/s and balancing resistance 100Pa is substituted into formula, percent opening K=27.4% can be calculated.The locating hole of on active damping plate 27% can be selected to position riveted joint.

Wind pipe of central air-conditioning air balance damping sheet structure of the present invention is simple, can corresponding different damping requirement, and is directly installed between flange that airduct section is connected with section, installs very convenient.With the volume damper that market generally uses, determine compared with air quantity valve, structure is simple, and low price, installs more convenient, reduces operation and maintenance cost, reduces airduct noise, improves the comfort level of air-out.

Above-described specific embodiment; the technical problem of solution of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (4)

1. a wind pipe of central air-conditioning air balance damping sheet, comprise fixing damping sheet, active damping plate, cover plate, outer-hexagonal bolt and nut, fixing damping sheet is connected by outer-hexagonal bolt, nut with cover plate, between fixing damping sheet and cover plate, form a cavity; It is characterized in that, described wind pipe of central air-conditioning air balance damping sheet also comprises an active damping plate, in the cavity of described active damping plate between fixing damping sheet and cover plate, all uniform even distribution damping hole one to one each other on fixing damping sheet and active damping plate.

2. wind pipe of central air-conditioning air balance damping sheet as claimed in claim 1, it is characterized in that, the aperture of described damping hole is φ 8mm.

3. wind pipe of central air-conditioning air balance damping sheet as claimed in claim 1 or 2, it is characterized in that, fixing damping sheet arranges the vertical stationary positioned hole of a row, active damping plate is arranged the activity orientation hole that a row tilts, activity orientation hole on active damping plate is riveted by the stationary positioned hole of quilting rivet and fixing damping sheet, regulate the different percent opening of wind pipe of central air-conditioning air balance damping sheet, and then regulate the air quantity by wind pipe of central air-conditioning air balance damping sheet.

4. wind pipe of central air-conditioning air balance damping sheet as claimed in claim 3, it is characterized in that, described percent opening determines according to following formula:

$K=\frac{70}{\sqrt{\frac{\mathrm{\Δ}H}{\frac{\mathrm{\ρ}}{2\×g}\×10\×V^2}}}$

Wherein K is percent opening, and △ H is balancing resistance, and V is air velocity, and g is acceleration of gravity, and ρ is atmospheric density.