CN105157155B - A kind of unilateral ventilation unit and its control method for forming air pond air current composition - Google Patents
A kind of unilateral ventilation unit and its control method for forming air pond air current composition Download PDFInfo
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- CN105157155B CN105157155B CN201510547806.7A CN201510547806A CN105157155B CN 105157155 B CN105157155 B CN 105157155B CN 201510547806 A CN201510547806 A CN 201510547806A CN 105157155 B CN105157155 B CN 105157155B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
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Abstract
The unilateral ventilation unit and its control method of air pond air current composition are formed the invention discloses a kind of, including is vertically installed at the ventilation shaft at the top of room at corner, the ventilation shaft connects with room, and its cross section is that a quarter is circular；Two planes of ventilation shaft vertically are respectively parallel to two walls at the room corner that it is installed；The external air-supply arrangement of ventilation shaft top air outlet；Air exhausting device is additionally provided with the top of the room, the air exhausting device is connected with room.The device of the present invention reduces its combined amount with indoor pollution air or hot-air, improves the quality of wind pushing air；The cold air pond coverage rate of formation is wider, the air supply mode of two-sided wall attachment jet is formed using the two sides side wall of air outlet and corner, whole workspace is farthest acted on, so as to ensure that the freshness of all working region air, workspace air quality and humiture is met comfortableness requirement.
Description
Technical field
The present invention relates to a kind of ventilation unit, and in particular to a kind of unilateral ventilation unit for forming air pond air current composition and
Its control method.
Background technology
Modern suffer from " Interior Space after it experienced the harm of " smoke pollution " and " photochemical pollution "
Third time pollution based on gas pollution ".Show according to US Experts research, the degree of room air pollution is than outdoor serious 2-5
Times, under special circumstances even up to 100 times.Improve room air pollution, that improves IAQ most directly has
The method of effect is exactly to improve the circulation of room air, accelerates the discharge of indoor pollution air, accelerates the injection of outdoor fresh air.
Because replacement aeration can make office work area obtain higher air quality, higher thermal comfort and be imitated with higher ventilation
Rate, therefore replacement aeration is the ventilation form of relatively broad application in air-conditioning system at present.
Scrak type face formula ventilating system is commonly used in the prior art to realize indoor air-supply, and air outlet is bar slit, length-width ratio
Up to 1:50, the air-flow of submitting is sent out in a manner of planar.The system slip diffuser is arranged on side wall, the face formula air-flow of submitting
Workspace is sent to by the attaching effect of wall.But scrak type face formula ventilating system operationally still has some defects,
Because its air outlet is scrak type, belong to flat jet, air-flow axle center velocity attenuation is fast, and attaching range is shorter, the temperature difference and speed
Change is very fast；And the office work area of scrak type face formula ventilating system air-supply air-flow covering is limited in scope.
Meanwhile Chinese patent (the patent No.：200710018332.2), air outlet is rectangle in the air supply mode, using sending
The two sides side wall in air port and corner forms the air supply mode of two-sided wall attachment jet to improve wind pushing air quality and effect.But
But problem during specific implementation be present, the air outlet of the invention is rectangle, although it has attached two sides side wall, in identical
Under air output and air supply velocity, the rectangular air supply opening is as above-mentioned scrak type face formula ventilating system, air-flow and the week of submitting
Air contact area is larger in peripheral cell, air-supply air-flow can be caused to be mixed earlier with indoor pollution (heat) air, reduction is sent
Wind quality.
The content of the invention
For above-mentioned problems of the prior art or defect, it is an object of the present invention to provide one kind to form air
The unilateral ventilation unit and its control method of pond air current composition.
To achieve these goals, the present invention adopts the following technical scheme that：
It is a kind of to form the ventilation unit of air pond air current composition, including it is vertically installed at the ventilation duct at the top of room at corner
Road, the ventilation shaft connect with room, and its cross section is that a quarter is circular, two planes of ventilation shaft vertically
Two walls being respectively parallel at the room corner that it is installed；The external air-supply arrangement of ventilation shaft top air outlet；
Air exhausting device is additionally provided with the top of the room, the air exhausting device is connected with room.
Specifically, the air-supply arrangement includes ajutage, is disposed with new air-valve along wind direction on the ajutage and send
Air-valve, the end of the ajutage connect the ventilation shaft.
Specifically, the air exhausting device includes exhaust duct, and one end of the exhaust duct connects the exhaust outlet at the top of room.
Further, it is provided with air-returning device between the air exhausting device and air-supply arrangement.
Specifically, the air-returning device includes backwind tube, and regulating valve is provided with the backwind tube；
The both ends of the backwind tube connect ajutage and exhaust duct respectively；
The air-returning device also includes the exhaust valve for being arranged on air draft pipe end；
One end of backwind tube and the exhaust duct connection is arranged between exhaust outlet and exhaust valve, the backwind tube and air-supply
One end of pipe connection is arranged between blow valve and new air-valve.
Further, the layer that expands with heat and contract with cold is installed on the inwall of the ventilation shaft, its internal package leads warm piece.
Further, sensor is provided with the backwind tube between exhaust valve and exhaust outlet, the sensor connects
Connect controller, the controller is by wire and regulating valve, new air-valve and leads warm piece and is all connected with.
Further, layer outer wrap thermal insulation layer that expand with heat and contract with cold.
Further, at the intersection of two planes of the ventilation shaft vertically, with corner at the top of the room
Vertical curve between vertical range be d, itself and the radius R of air outlet ratio meet
A kind of control method for the unilateral ventilation unit for forming air pond air current composition, specifically includes following steps：
Step 1：Given initial temperature value is T0, the initial resh air requirement of ajutage conveying is Q1, backwind tube conveying it is initial
Return air amount is Q2, then the ventilation total amount Q=Q of ventilation shaft1+Q2；It is T that temperature sensor, which measures return air temperature in exhaust duct, and will
Above- mentioned information is sent to controller；
Step 2：Controller calculating temperature difference △ T1, Δ T1=T-T0, controller sends signal to new air-valve, regulating valve and leads
Warm piece, control new air-valve, regulating valve opening degree and lead the temperature change of warm piece, its concrete methods of realizing is as follows：
Situation one：Keep the air supply velocity of ventilation shaft constant
If △ T1>0, then the opening degree of controller control new air-valve, makes the resh air requirement that ajutage conveys by Q1Increase to
Q1', the regulating degree of valve is controlled to adjust, makes the return air amount that backwind tube conveys by Q2Reduce to Q2', control is attached to ventilation shaft
The temperature for leading warm piece in inwall is by T1Reduce to T2Change, temperature difference △ T2, and Δ T2=T1-T2, Q1′+Q2′>Q, the temperature difference △ T2Make
The thickness that must expand with heat and contract with cold degree is by L1Reduce to L2, stroke is △ L, Δ L=L1-L2, the cross-sectional area of ventilation shaft increases by A
For A '；
Wherein,
ΔT1=α Δs T2=β Δs L (1)
In formula, linear coefficient α and β is constant；
If △ T1<0, then the opening degree of controller control new air-valve, makes the resh air requirement that ajutage conveys by Q1Reduce extremely
Q1', the regulating degree of valve is controlled to adjust, makes the return air amount that backwind tube conveys by Q2Increase to Q2', control is attached to ventilation shaft
The temperature for leading warm piece in inwall is by T1Increase to T2Change, temperature difference △ T2, and Δ T2=T2-T1, Q1′+Q2′<Q, change temperature difference △
T2So that the thickness degree that expands with heat and contract with cold is by L1Increase to L2, stroke is △ L, Δ L=L2-L1, the cross-sectional area of ventilation shaft subtracts by A
Small is A '；
Situation two：The air supply velocity of ventilation shaft changes
If △ T1>0, then need the air supply velocity of ventilation shaft to become big, then the opening degree of controller control new air-valve, makes
The resh air requirement of ajutage conveying is by Q1Increase to Q1', the regulating degree of valve is controlled to adjust, makes the return air amount that backwind tube conveys by Q2
Reduce to Q2', and Q1′+Q2′>Q；Lead warm piece temperature and keep constant；Or individually warm piece temperature increase is led in control to controller, leads temperature
The temperature of piece is by T1Increase to T2, the temperature difference is △ T2, and Δ T2=T2-T1, change temperature difference △ T2So that the thickness degree that expands with heat and contract with cold is by L1
Increase to L2, stroke is △ L (Δ L=L2-L1), the cross-sectional area of ventilation shaft is reduced to A ' by A；
If △ T1<0, then need the air supply velocity of ventilation shaft to diminish, then the opening degree of controller control new air-valve, makes
The resh air requirement of ajutage conveying is by Q1It is decreased to Q1', the regulating degree of valve is controlled to adjust, makes the return air amount that backwind tube conveys by Q2
Increase to Q2', and Q1′+Q2′<Q；Lead warm piece temperature and keep constant；Or individually warm piece temperature reduction is led in control to controller, leads temperature
The temperature of piece is by T1It is decreased to T2, the temperature difference is △ T2, and Δ T2=T1-T2, change temperature difference △ T2So that the thickness degree that expands with heat and contract with cold is by L1
It is decreased to L2, stroke is △ L (Δ L=L1-L2), the cross-sectional area of ventilation shaft is increased to A ' by A.
Compared with prior art, the present invention has following technique effect：
1st, the present invention sets ventilation shaft, and its cross section is that a quarter is circular, is installed at the top of room at corner, utilizes
Air outlet and the two sides side wall in corner form the air supply mode of two-sided wall attachment jet, form the pillar air-supply air-flow for being affixed on wall,
Reduce air-supply air-flow to inhale the volume of room air so that before air-supply air-flow delivers to workspace along the attaching of side wall wall, reduce
Its combined amount with indoor pollution air or hot-air, improve the quality of wind pushing air；Pillar air-supply air-flow reaches room
Between behind the corner of bottom, after bottom plate is hit in its impact jet flow formed, along the radial diffusion of sector, the cold air of formation on bottom plate
Pond coverage rate is wider, and air-supply air-flow farthest acts on whole workspace, so as to ensure that the new of all working region air
Freshness, workspace air quality and humiture is set to meet comfortableness requirement.
The 2nd, air-supply arrangement is set, installed in corner at the top of room, be not take up the lower space in room, device is arranged simple square
Just.
The 3rd, air-returning device is set, the gas in exhaust duct is transported in ajutage, mixed with fresh air, is conveyed again
Into ventilation shaft, so as to reuse, the energy is saved.
The 4th, the layer that expands with heat and contract with cold is set in ventilation shaft, its internal package leads warm piece, and the described layer that expands with heat and contract with cold can be with leading
The temperature change of warm piece is expanded with heat and contract with cold, so that the internal diameter of the pipeline of ventilation shaft changes, control air-supply air-flow enters work
Make the amount in area so that the temperature and humidity in room is suitable.
5th, the control method of the unilateral ventilation unit for forming air pond air current composition for forming air pond of the invention, according to
The temperature of exhaust duct, easily and effectively control fresh air and the mixed proportion of return air, and the pipe diameter size of ventilation shaft so that room
The interior temperature and humidity for reaching suitable human body.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is ventilation duct structure schematic diagram；
Fig. 3 is the room air motion pattern formed using the device of the present invention；
Fig. 4 is one air supply velocity of experiment when be 1m/s, the diagonal face velocity cloud atlas in air outlet place room；
Fig. 5 is air themperature cloud charts at one indoor different cross section of experiment, and Fig. 5 (a1) is x=1 sections inner section figure,
Fig. 5 (a2) is air themperature cloud charts in section at x=1, and Fig. 5 (b1) is y=2.5 sections inner section figure, and Fig. 5 (b2) is y=
Air themperature cloud charts in section at 2.5, Fig. 5 (c1) are z=1.5 sections inner section figures, and Fig. 5 (c2) is that section is empty at z=1.5
Temperature degree cloud charts；
Fig. 6 is the room air motion pattern of scrak type face formula ventilation unit in experiment two；
Fig. 7 is that scrak type face formula ventilation unit is used in experiment two, air themperature cloud charts at indoor different cross section, figure
7 (a1) are x=1 sections inner section figures, and Fig. 7 (a2) is air themperature cloud charts in section at x=1, and Fig. 7 (b1) is at y=2.5
Indoor sectional view, Fig. 7 (b2) are air themperature cloud charts in section at y=2.5, and Fig. 7 (c1) is z=1.5 sections inner section figure,
Fig. 7 (c2) is air themperature cloud charts in section at z=1.5；
Fig. 8 is to use apparatus of the present invention air supply velocity in experiment three as 2m/s, the diagonal face velocity cloud in room where air outlet
Figure；
Fig. 9 is to use apparatus of the present invention air supply velocity in experiment four as 3m/s, the diagonal face velocity cloud in room where air outlet
Figure.
Label represents in figure：1-regulating valve, 2-new air-valve, 3-air processor, 4-ajutage, 5-wire, 6-
Blow valve, 7-air outlet, 8-ventilation shaft, 9-exhaust outlet, 10-exhaust duct, 11-sensor, 12-controller, 13-
Exhaust valve, 14-lead warm piece, 15-expand with heat and contract with cold layer, 16-thermal insulation layer, 17-backwind tube.
Further details of explanation and illustration is done to the solution of the present invention with reference to the accompanying drawings and examples.
Embodiment
Above-mentioned technical proposal is deferred to, referring to Fig. 1, the unilateral ventilation unit for forming air pond air current composition of the invention, bag
The ventilation shaft 8 being vertically installed at the corner of room top is included, the ventilation shaft 8 connects with room, and its cross section is four points
One of circle, two planes of ventilation shaft 8 vertically be respectively parallel to two walls at the room corner that it is installed
Wall；8 top air outlet of ventilation shaft, the 7 external air-supply arrangement；Air exhausting device, the air draft are additionally provided with the top of the room
Device is connected with room.
The air-supply arrangement of the present invention is arranged on room top, is not take up the lower space in room, and device arrangement is simple and convenient.
The cross section of ventilation shaft 8 of the present invention is circular for a quarter, and ventilation shaft 8 is a quarter cylinder, using air outlet with
The two sides side wall in corner forms the air supply mode of two-sided wall attachment jet, so as to form the pillar air-supply air-flow for being affixed on wall, pillar
Air-flow of blowing reaches room floor, after bottom plate is hit in its impact jet flow formed, along the radial diffusion of sector on bottom plate, is formed
Cold air pond coverage rate it is wider, air-supply air-flow farthest act on whole workspace, so as to ensure that all working region
The freshness of air, workspace air quality and humiture is set to meet comfortableness requirement.
Wind can be directly sent to workspace by the device of the present invention, can effectively be reduced office work area air themperature, be reached
The effect of energy-conservation.
The ventilation shaft 8 is arranged on the top of overhead room, at corner at the top of room；The ventilation shaft 8
Vertical range between the intersection of two planes vertically, with the vertical curve at the top of the room at corner is d, its with
The radius R of air outlet 7 ratio meets
Enable the air-flow sent out by ventilation shaft 8 to form the jet for attaching side wall, further reduce itself and interior
The combined amount of air or hot-air is polluted, improves the quality of wind pushing air.
Air-flow is sent out from ventilation shaft 8 and forms jet, because the bottom surface of ventilation shaft 8 is near enough from side wall, close to side
The air-flow that the both sides of wall and remote side wall are sent out produces Involving velocity, and the sky that the two volume is inhaled to the air of its surrounding environment respectively
Makings amount is unequal, and the air-flow volume suck quality away from side wall side is more than the air matter inhaled close to the sidewind of side wall one volume
Amount；It is of substantially equal that the energy of both sides environment is passed to by borderline turbulent mixing effect due to jet, so away from side wall
The air-flow Entrainment Velocity of side is slow, and the air-flow Entrainment Velocity close to side wall side is fast, so as to close to the stream pressure of side wall side
Small, jet deflects to close to side wall side, and hereafter close to the sidewind Entrainment Velocity of side wall one faster, pressure is lower, and jet continues
Side wall is inclined to, until being attached to completely on side wall wall untill formation steady flow.When d increases, the air-flow both sides of submitting exist
The ambient air quality influenceed in the same time by Involving velocity is gradually equal, and air-flow both sides just will not form pressure differential,
So as to which air-flow will not be attached on side wall, by verification experimental verification, choose
The selection of the height of the ventilation shaft 8 considers that it can form stable a quarter cylindrical streams, passes through
Analysis of experiments, its height should be greater than 100mm, so as to which the air-flow for avoiding the air outlet of the bottom of ventilation shaft 8 from sending out occurs to surrounding
Diffusion, aggravate air turbulence the occurrence of.Meanwhile from the point of view of slave unit is installed and be attractive in appearance, the height of ventilation shaft 8 is not
Height of the ceiling away from roof should be exceeded.
The selection of the radius of a quarter circle cross section of the ventilation shaft 8 goes out according to air output Q and air outlet
Wind velocity V is calculated, calculation formula：
Specifically, the air-supply arrangement includes ajutage 4, and the He of new air-valve 2 is disposed with along wind direction on the ajutage 4
Blow valve 6, the end of the ajutage 4 connect the ventilation shaft 8.Further, new air-valve 2 and blow valve 6 on ajutage 4
Between be provided with air processor 3.The suspension type air of model ZKJ6-DT combined metal may be selected in air processor 3
Handle unit, nominal air delivery 6000m3/h。
Specifically, the air exhausting device includes exhaust duct 10, and one end of the exhaust duct 10 connects the air draft at the top of room
Mouth 9.
The ajutage 4 is used to fresh air being transported in ventilation shaft 8, and the air-supply air-flow that ventilation shaft 8 is formed enters work
Make in area, take away heat and dusty gas caused by human body and heat-producing device, above-mentioned heat and dusty gas fill via air draft
Put and be discharged to outdoor.
The new air-valve 2 is used for the amount for adjusting the fresh air entered in ventilation shaft 8；The air processor 3 is used to purify
Fresh air into ventilation shaft 8；
The blow valve 6 can flexibly be adjusted according to the requirement to air supply velocity, ensure that interior has suitable temperature
And humidity.Experiment proves that when the air supply velocity of air outlet 7 is less than 0.5m/s, the pillar air-supply gas of apparatus of the present invention formation
Stream attaches the ineffective of side wall, and required impact air-flow can not be formed with room floor；When the air-supply air-flow of air outlet 7 is more than
During 3m/s, indoor occupant will produce " blowing feeling ", and therefore, the air supply velocity scope that blow valve 6 controls is 0.5~3m/s.
Further, it is provided with air-returning device between the air exhausting device and air-supply arrangement.
Because the device of the present invention can effectively improve indoor air quality, to room temperature lowering positive effect so that by air draft
The room airs of mouthfuls 9 discharges are relatively low, in order to avoid the waste of cold air, set air-returning device, for by the gas in exhaust duct 10
Body is transported in ajutage 4, is mixed with fresh air, is re-delivered in ventilation shaft 8, so as to reuse, saves the energy.
Specifically, the air-returning device includes backwind tube 17, and regulating valve 1 is provided with the backwind tube 17；The return air
The both ends of pipe 17 connect ajutage 4 and exhaust duct 10 respectively；The air-returning device also includes the row for being arranged on the end of exhaust duct 10
Air-valve 13；One end of backwind tube 17 and exhaust duct 10 connection is arranged between exhaust outlet 9 and exhaust valve 13, the backwind tube
17 and ajutage 4 connect one end be arranged between air processor 3 and new air-valve 2.
The new air-valve 2, regulating valve 1 and exhaust valve 13 are used to control fresh air and the mixed proportion of return air so that are ensureing
While indoor preference temperature and humidity, the effectively save energy.
Further, the layer 15 that expands with heat and contract with cold is installed on the inwall of the ventilation shaft 8, its internal package leads warm piece 14.
Further, the outer wrap thermal insulation layer 16 of layer 15 that expands with heat and contract with cold.
The described layer 15 that expands with heat and contract with cold can expand with heat and contract with cold with the temperature change for leading warm piece 14, so that ventilation shaft 8
Internal diameter of the pipeline change, control air-supply air-flow enter workspace amount.The described layer 15 that expands with heat and contract with cold uses deformation range
Greatly, the flexible composite that bearing capacity is high and anti-fatigue performance is good.Described warm piece 14 of leading selects copper.
Described thermal insulation layer 16 is used for the ginseng for the air-supply air-flow for preventing the temperature change for leading warm piece 14 from causing in ventilation shaft 8
Several changes.
Further, sensor 11, the biography are provided with the backwind tube 10 between exhaust valve 13 and exhaust outlet 9
Sensor 11 connects controller 12, and the controller 12 is by wire 5 and regulating valve 1, new air-valve 2 and leads warm piece 14 and is all connected with.
Described sensor 11 can use temperature sensor or CO2Sensor, the temperature sensor are used to monitor heat
Air-flow, the CO2Sensor is used for monitoring pollution gas.The signal transfer control 12 that sensor 11 will measure, the control
Device 12 controls to adjust valve 1 and the opening degree of new air-valve 2, controls fresh air and the mixed proportion of return air；Warm piece 14 is led in control simultaneously
Temperature variation, so as to adjust the stroke of the layer 15 that expands with heat and contract with cold.
A kind of control method for the unilateral ventilation unit for forming air pond air current composition, wherein, sensor 11 uses temperature
Sensor, its specific control method are as follows：
Step 1：Given initial temperature value is T0, the initial resh air requirement that ajutage 4 conveys is Q1, at the beginning of the conveying of backwind tube 10
Beginning return air amount is Q2, then the ventilation total amount Q=Q of ventilation shaft1+Q2；It is T that temperature sensor, which measures return air temperature in exhaust duct 10,
(T≠T0), and above- mentioned information is sent to controller 12；
Step 2：The calculating temperature difference △ T of controller 121(ΔT1=T-T0), controller 12 sends signal to new air-valve 2, regulation
Valve 1 and lead warm piece 14, control new air-valve 2, regulating valve 1 opening degree and lead the temperature change of warm piece 14, it is implemented
Method is as follows：
Situation one：Keep the air supply velocity of ventilation shaft 8 constant
If △ T1>0, then the opening degree of the control of controller 12 new air-valve 2, makes the resh air requirement that ajutage conveys by Q1Increase
To Q1', the regulating degree of valve 1 is controlled to adjust, makes the return air amount that backwind tube 17 conveys by Q2Reduce to Q2', control is attached to ventilation
The temperature for leading warm piece 14 in the inwall of pipeline 8 is by T1Reduce to T2Change, temperature difference △ T2, and Δ T2=T1-T2, Q1′+Q2′>Q, become
Change temperature difference △ T2So that the thickness of layer 15 that expands with heat and contract with cold is by L1Reduce to L2, stroke is △ L (Δ L=L1-L2), and then cause to divulge information
The cross-sectional area of pipeline 8 is increased to A ' by A；
Wherein,
ΔT1=α Δs T2=β Δs L (1)
In formula, linear coefficient α and β is constant.
If △ T1<0, then the opening degree of the control of controller 12 new air-valve 2, makes the resh air requirement that ajutage conveys by Q1Reduce
To Q1', the regulating degree of valve 1 is controlled to adjust, makes the return air amount that backwind tube 17 conveys by Q2Increase to Q2', control is attached to ventilation
The temperature for leading warm piece 14 in the inwall of pipeline 8 is by T1Increase to T2Change, temperature difference △ T2, and Δ T2=T2-T1, Q1′+Q2′<Q, become
Change temperature difference △ T2So that the thickness of layer 15 that expands with heat and contract with cold is by L1Increase to L2, stroke is △ L (Δ L=L2-L1), and then cause to divulge information
The cross-sectional area of pipeline 8 is reduced to A ' by A；
(2) air supply velocity of ventilation shaft 8 changes
If △ T1>0, then need the air supply velocity of ventilation shaft 8 to become big, then controller 12 controls the unlatching journey of new air-valve 2
Degree, make the resh air requirement that ajutage conveys by Q1Increase to Q1', the regulating degree of valve 1 is controlled to adjust, makes returning for the conveying of backwind tube 17
Air quantity is by Q2Reduce to Q2', and Q1′+Q2′>Q；Lead the warm temperature of piece 14 and keep constant；Or individually warm piece is led in control to controller 12
14 temperature increase, and lead the temperature of warm piece 14 by T1Increase to T2, the temperature difference is △ T2, and Δ T2=T2-T1, change temperature difference △ T2So that
The thickness of layer 15 expand with heat and contract with cold by L1Increase to L2, stroke is △ L (Δ L=L2-L1), and then cause the cross section of ventilation shaft 8
Product is reduced to A ' by A.
If △ T1<0, if desired the air supply velocity of ventilation shaft 8 diminish, then controller 12 control new air-valve 2 unlatching journey
Degree, make the resh air requirement that ajutage conveys by Q1It is decreased to Q1', the regulating degree of valve 1 is controlled to adjust, makes returning for the conveying of backwind tube 17
Air quantity is by Q2Increase to Q2', and Q1′+Q2′<Q；Lead the warm temperature of piece 14 and keep constant；Or individually warm piece is led in control to controller 12
14 temperature reduce, and lead the temperature of warm piece 14 by T1It is decreased to T2, the temperature difference is △ T2, and Δ T2=T1-T2, change temperature difference △ T2So that
The thickness of layer 15 expand with heat and contract with cold by L1It is decreased to L2, stroke is △ L (Δ L=L1-L2), and then cause the cross section of ventilation shaft 8
Product is increased to A ' by A.
Experimental analysis
Experiment one
It is 4000 (x) × 5000 (y) × 2600 (z) (mm to establish room-sized according to actual conditions3) numerical computations mould
Type, the radius of ventilation shaft：R=356 (mm), exhaust outlet are arranged on the ceiling of room crown center, exhaust outlet size：
400×200(mm2), it is 50w/m that room thermal source, which is simplified to floor heat flow density,2, the thermal insulation of remaining wall.Wind pushing temperature is 291K,
Air supply velocity is 1m/s.
In order to verify the air current composition spread condition of apparatus of the present invention and room temperature lowering effect, from average turbulence energy mould
Type, i.e. standard k- ε two-equation models (standard k- ε model) solve equation group.
Discrete to the progress of above-mentioned governing equation using finite volume method, discrete scheme selects Second-order Up-wind form, introduces side
Discrete equation is solved from SIMPLE algorithms after boundary's condition, when speed term and pressure term residual values are respectively less than 10-3, while temperature
10 are respectively less than with the residual values of component-6When, governing equation group convergence, it can thus be concluded that indoor air flows situation.
Fig. 3 is the room air motion pattern formed using the device of the present invention；By Fig. 3, it is apparent that air outlet is sent
The pillar air-flow gone out is attached at top corner two side walls along side wall, is then sent to up to room bottom corner, hits along under two side
Floor diffusion is hit, forms the uniform air pond of speed.Pillar air-supply Diffusion of gas stream scope is very big, and being calculated at air supply velocity is
In the case of 1m/s, its jet face domain accounts for the 100% of whole room floor, that is, air-flow of blowing all covers whole working region.Ginseng
See Fig. 4, workspace wind speed is about 0.1m/s, and the tip speed that jet reaches opposite side wall is 0.1m/s.
Fig. 5 is the different cross section indoor air temperature cloud charts formed using the device of the present invention；It can be seen by Fig. 5
Go out, for room indoor temperature distribution than more uniform, same section diverse location temperature difference is smaller.Being calculated at wind pushing temperature is
In the case of 291K, x=2m section temperatures average value is 298.7K, and y=2.5m section temperatures average value is 298.6K, and respiratory region is high
It is 298.8K to spend (z=1.5m) temperature averages, and other section temperature average values are shown in Table 1.Different cross section temperature becomes as shown in Table 1
Change is very small, and different cross section maximum temperature difference is 0.1K.As can be seen here, the whole room temperature ratio of pillar ventilation and air conditioning system air-supply
It is more uniform.
Experiment two
The indoor air flow of device and scrak type face formula vertical wall attaching jet ventilation unit the most frequently used at present to the present invention
Diffusion effect and workspace temperature field carry out contrast test.
With experiment one condition identical in the case of, the air outlet of scrak type face formula air-supply arrangement is arranged in adjacent side wall
On ceiling.Based on being 2000 × 50 (mm with apparatus of the present invention air outlet area equation, scrak type air outlet size2), air-supply
Temperature is 291K, air supply velocity 1m/s.
Fig. 6 is the room air motion pattern of scrak type face formula ventilation unit；As seen from Figure 6, face is sent out from air outlet
Side wall is attached at along perpendicular wall after formula air-flow, shock floor diffusion is sent under right side wall, forms air pond.Its blow mechanism with
The device of the present invention is similar, but the device that formula air-supply Diffusion of gas stream scope in scrak type face does not have the present invention is big, is calculated at
In the case of air supply velocity is 1m/s, the gas flow jet face domain ABCD of face formula air-supply arrangement accounts for the 69% of whole room floor.
Fig. 7 is scrak type face formula ventilating system indoor temperature distribution cloud atlas；As seen from Figure 7, scrak type face formula is blown
The room indoor temperature distribution of device is uneven, and same section diverse location temperature difference is larger.Being calculated at wind pushing temperature is
In the case of 291K, x=1m section temperatures average value is 300.5K, and y=2.5m section temperatures average value is 301.2K, and respiratory region is high
It is 300.8K to spend (z=1.5m) temperature averages, and other section temperature average values are shown in Table 1, and the different cross section temperature difference becomes as shown in Table 1
Change larger, the maximum cross-section temperature difference is up to 0.4K.As can be seen here, the whole room temperature blown using scrak type face formula ventilation unit
Skewness.
Found by contrasting, blown in identical under operating mode, the air-supply gas flow jet face domain that apparatus of the present invention are formed is than passing
The face formula air-supply arrangement of system expands 44.9%, that is, efficiency of blowing improves 44.9%, so as to cause indoor pollutant air to update
Amount is big, ensure that air freshness, improves air conditioning comfortableness, while it is obvious to cool.
Table 1 is pillar ventilation and air conditioning system and face formula supply air system different cross section temperature comparisons, as can be seen from Table 1, is adopted
It is low with the equal specific surface formula air-supply arrangement of the temperature averages of the indoor room different cross section of apparatus of the present invention, so that using this hair
The low 2.0K of the whole respiratory region temperature averages specific surface formula air-supply arrangement in interior of the pillar ventilation unit of bright device, it can be seen that,
Pillar ventilation and air conditioning system cooling-down effect is obvious, and energy-saving effect is notable.To find out its cause, it is due to that pillar supply air system arrives in air-supply
During up to ground, cold air distribution air-flow and indoor high temperature air contact area specific surface formula supply air system are small, (are computed, pillar air-supply
Air-flow is 3.3m along vertical wall attaching jet and room air contact area2, face formula blow air-flow along vertical wall attaching jet with it is indoor
Air contact area is 5.46m2), caused heat exchange amount is small, so as to cause pillar air-supply air-flow reach workspace when temperature specific surface
Formula supply air system gas flow temperature is low, therefore cooling-down effect is obvious, systematic comparison energy-conservation.Furthermore pillar air-supply arrangement of the invention
Installed in room top, room utilization ratio is improved.
The v=1m/s pillars air-supply arrangement of table 1 contrasts (K) with face formula air-supply arrangement in different cross section temperature averages
Experiment three
With experiment one condition identical in the case of, change air supply velocity is 2m/s, then workspace wind speed is about 0.2m/s,
Not only air output increase, room air freshness is improved, simultaneously because the increase of air supply velocity, jet reaches the end of opposite side wall
End speed is 0.2m/s, and stream distance is farther, the air-supply efficiency of pillar air-supply arrangement of the present invention is improved, referring to Fig. 8.When air-supply speed
Spend for 2m/s when, each section temperature average value is shown in Table 2.As shown in Table 2, as v=2m/s, indoor each section mean temperature compares v
Room Nei Ge sections mean temperature has reduced about 4K during=1m/s, and cooling-down effect is obvious, and the mean temperature in each section is equal, shows
Room indoor temperature distribution is highly uniform.
The v=2m/s pillars air-supply arrangement of table 2 contrasts (K) in different cross section temperature averages
Experiment four
With experiment one condition identical in the case of, change air supply velocity is 3m/s, then workspace wind speed is about 0.3m/s,
Not only air output increase, room air freshness is improved, simultaneously because the increase of air supply velocity, jet reaches the end of opposite side wall
End speed is 0.3m/s, and stream distance is farther, the air-supply efficiency of pillar air-supply arrangement of the present invention is improved, referring to Fig. 9.When air-supply speed
Spend for 3m/s when, each section temperature average value is shown in Table 3.As shown in Table 3, as v=3m/s, indoor each section mean temperature compares v
Room Nei Ge sections mean temperature has reduced about 1.1K during=2m/s, and cooling-down effect trend has been reduced.Now room temperature is distributed
It is still highly uniform.
The v=3m/s pillars air-supply arrangement of table 3 contrasts (K) in different cross section temperature averages
To sum up, it can be seen that when being blown using the pillar air-supply arrangement of the present invention, room workspace cooling-down effect is obvious, temperature
Degree distribution is than more uniform.Air supply velocity is bigger, and room workspace speed is bigger, while jet end air velocity is bigger, air-supply
Stream distance is farther, so as to ensure space air quality and thermal comfort.
Claims (9)
1. a kind of unilateral ventilation unit for forming air pond air current composition, it is characterised in that including being vertically installed at the top of room
Ventilation shaft (8) at corner, the ventilation shaft (8) connect with room, and its cross section is that a quarter is circular, ventilation shaft
(8) two planes vertically are respectively parallel to two walls at the room corner that it is installed；The ventilation shaft
(8) top air outlet (7) external air-supply arrangement；
Air exhausting device is additionally provided with the top of the room, the air exhausting device is connected with room；
The air-supply arrangement includes ajutage (4), is disposed with new air-valve (2) along wind direction on the ajutage (4) and blows
Valve (6), the end of the ajutage (4) connect the ventilation shaft (8).
2. the unilateral ventilation unit of air pond air current composition is formed as claimed in claim 1, it is characterised in that the air draft dress
Put including exhaust duct (10), one end of the exhaust duct (10) connects the exhaust outlet (9) at the top of room.
3. the unilateral ventilation unit of air pond air current composition is formed as claimed in claim 2, it is characterised in that the air draft dress
Put and air-returning device is provided between air-supply arrangement.
4. the unilateral ventilation unit of air pond air current composition is formed as claimed in claim 3, it is characterised in that the return air dress
Put including backwind tube (17), regulating valve (1) is provided with the backwind tube (17)；
The both ends of the backwind tube (17) connect ajutage (4) and exhaust duct (10) respectively；
The air-returning device also includes the exhaust valve (13) for being arranged on exhaust duct (10) end；
One end that the backwind tube (17) is connected with exhaust duct (10) is arranged between exhaust outlet (9) and exhaust valve (13), described
One end that backwind tube (17) is connected with ajutage (4) is arranged between blow valve (6) and new air-valve (2).
5. the unilateral ventilation unit of air pond air current composition is formed as claimed in claim 4, it is characterised in that the ventilation duct
The layer that expands with heat and contract with cold (15) is installed, its internal package leads warm piece (14) on the inwall in road (8).
6. the unilateral ventilation unit of air pond air current composition is formed as claimed in claim 5, it is characterised in that the backwind tube
(10) sensor (11) is provided between exhaust valve (13) and exhaust outlet (9), the sensor (11) connects controller
(12), the controller (12) by wire (5) and regulating valve (1), new air-valve (2) and is led warm piece (14) and is all connected with.
7. the unilateral ventilation unit for forming air pond air current composition as described in claim 5 or 6, it is characterised in that the heat
Swollen shrinkage layer (15) outer wrap thermal insulation layer (16).
8. the unilateral ventilation unit for forming air pond air current composition as described in claim 1 to 6 is any, it is characterised in that institute
The intersection of two planes of ventilation shaft (8) vertically is stated, hanging down between the vertical curve at corner at the top of the room
Straight distance be d, itself and the radius R of air outlet (7) ratio satisfaction
9. a kind of control method for the unilateral ventilation unit for forming air pond air current composition, specifically includes following steps：
Step 1：Given initial temperature value is T0, the initial resh air requirement of ajutage (4) conveying is Q1, at the beginning of backwind tube (10) conveying
Beginning return air amount is Q2, then the ventilation total amount Q=Q of ventilation shaft1+Q2；Temperature sensor measures exhaust duct (10) interior return air temperature
T, and above- mentioned information is sent to controller (12)；
Step 2：Controller (12) calculating temperature difference △ T1, Δ T1=T-T0, controller (12) send signal to new air-valve (2), adjust
Section valve and leads warm piece (14) at (1), control new air-valve (2), regulating valve (1) opening degree and lead the temperature change of warm piece (14)
Change, its concrete methods of realizing is as follows：
Situation one：Keep the air supply velocity of ventilation shaft (8) constant
If △ T1>0, then the opening degree of controller (12) control new air-valve (2), makes the resh air requirement that ajutage conveys by Q1Increase
To Q1', the regulating degree of valve (1) is controlled to adjust, makes the return air amount that backwind tube (17) conveys by Q2Reduce to Q2', control is attached to
The temperature for leading warm piece (14) in ventilation shaft (8) inwall is by T1Reduce to T2Change, temperature difference △ T2, and Δ T2=T1-T2, Q1′+
Q2′>Q, the temperature difference △ T2So that the layer that expands with heat and contract with cold (15) thickness is by L1Reduce to L2, stroke is △ L, Δ L=L1-L2, ventilation duct
The cross-sectional area in road (8) is increased to A ' by A；
Wherein,
ΔT1=α Δs T2=β Δs L (1)
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In formula, linear coefficient α and β is constant；
If △ T1<0, then the opening degree of controller (12) control new air-valve (2), makes the resh air requirement that ajutage conveys by Q1Reduce
To Q1', the regulating degree of valve (1) is controlled to adjust, makes the return air amount that backwind tube (17) conveys by Q2Increase to Q2', control is attached to
The temperature for leading warm piece (14) in ventilation shaft (8) inwall is by T1Increase to T2Change, temperature difference △ T2, and Δ T2=T2-T1, Q1′+
Q2′<Q, the change temperature difference △ T2So that the layer that expands with heat and contract with cold (15) thickness is by L1Increase to L2, stroke is △ L, Δ L=L2-L1, lead to
The cross-sectional area of wind pipeline (8) is reduced to A ' by A；
Situation two：The air supply velocity of ventilation shaft (8) changes
If △ T1>0, then need the air supply velocity of ventilation shaft (8) to become big, then the unlatching journey of controller (12) control new air-valve (2)
Degree, make the resh air requirement that ajutage conveys by Q1Increase to Q1', the regulating degree of valve (1) is controlled to adjust, conveys backwind tube (17)
Return air amount by Q2Reduce to Q2', and Q1′+Q2′>Q；Lead warm piece (14) temperature and keep constant；Or controller (12) is individually controlled
The increase of warm piece (14) temperature is guided, leads the temperature of warm piece (14) by T1Increase to T2, the temperature difference is △ T2, and Δ T2=T2-T1, change
Temperature difference △ T2So that the layer that expands with heat and contract with cold (15) thickness is by L1Increase to L2, stroke is △ L, Δ L=L2-L1, ventilation shaft (8)
Cross-sectional area is reduced to A ' by A；
If △ T1<0, then need the air supply velocity of ventilation shaft (8) to diminish, then the unlatching journey of controller (12) control new air-valve (2)
Degree, make the resh air requirement that ajutage conveys by Q1It is decreased to Q1', the regulating degree of valve (1) is controlled to adjust, conveys backwind tube (17)
Return air amount by Q2Increase to Q2', and Q1′+Q2′<Q；Lead warm piece (14) temperature and keep constant；Or controller (12) is individually controlled
The reduction of warm piece (14) temperature is guided, leads the temperature of warm piece (14) by T1It is decreased to T2, the temperature difference is △ T2, and Δ T2=T1-T2, change
Temperature difference △ T2So that the layer that expands with heat and contract with cold (15) thickness is by L1It is decreased to L2, stroke is △ L, Δ L=L1-L2, ventilation shaft (8)
Cross-sectional area is increased to A ' by A.
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| CN106705335A (en) * | 2016-12-21 | 2017-05-24 | 大连理工大学 | Working area wall surface attaching jet air conditioning ventilation system |
| CN110307597B (en) * | 2019-07-11 | 2023-07-21 | 珠海格力电器股份有限公司 | Partition control air conditioner indoor unit, control method and air conditioner unit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101105329A (en) * | 2007-07-24 | 2008-01-16 | 西安交通大学 | Double side wall-attached jet air-supply style |
| CN101225988A (en) * | 2008-01-21 | 2008-07-23 | 西安建筑科技大学 | Ventilating system of vertical wall attaching jet air lake mode |
| WO2009001486A1 (en) * | 2007-06-22 | 2008-12-31 | Shinryo Corporation | Air-conditioning method and air-conditioning apparatus for clean rooms |
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| JP3854161B2 (en) * | 2002-01-31 | 2006-12-06 | 株式会社日立製作所 | Display device |
| KR101599598B1 (en) * | 2014-01-24 | 2016-03-04 | 인하공업전문대학산학협력단 | Air control system for the vinyl-house |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009001486A1 (en) * | 2007-06-22 | 2008-12-31 | Shinryo Corporation | Air-conditioning method and air-conditioning apparatus for clean rooms |
| CN101105329A (en) * | 2007-07-24 | 2008-01-16 | 西安交通大学 | Double side wall-attached jet air-supply style |
| CN101225988A (en) * | 2008-01-21 | 2008-07-23 | 西安建筑科技大学 | Ventilating system of vertical wall attaching jet air lake mode |
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