CN105864885A - Air conditioning unit - Google Patents
Air conditioning unit Download PDFInfo
- Publication number
- CN105864885A CN105864885A CN201510956308.8A CN201510956308A CN105864885A CN 105864885 A CN105864885 A CN 105864885A CN 201510956308 A CN201510956308 A CN 201510956308A CN 105864885 A CN105864885 A CN 105864885A
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- CN
- China
- Prior art keywords
- air
- centrifugal fan
- alar part
- heat exchanger
- alar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
- F24F1/0022—Centrifugal or radial fans
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
- F24F1/0047—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
- F24F2013/0616—Outlets that have intake openings
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
- Air-Flow Control Members (AREA)
Abstract
The present invention provides an air conditioning unit having an indoor unit, the indoor unit including: a casing; a centrifugal fan having a hub, a shroud, and blades disposed therebetween; and an indoor heat exchanger which surrounds the centrifugal fan, the casing containing the centrifugal fan and the indoor heat exchanger. In the indoor unit, the indoor heat exchanger has a planar air inflow surface allowing an inflow of air discharged from an air outlet of the centrifugal fan, the air inflow surface is provided with a rectifying member, the rectifying member includes a support having an insertion portion fixed between fins on the air inflow surface, and a vane having a shape extending from the support toward a direction opposite a rotating direction of the centrifugal fan, the rectifying member configured to block some of the air flowing between the centrifugal fan and the air inflow surface, and an angle formed by the insertion portion and the vane in the plane orthogonal to a rotation axis of the centrifugal fan is set to become parallel to the air inflow from the air outlet to the air inflow surface at least at the hub side to increase a static pressure of the air at upstream and downstream sides of the vane.
Description
Technical field
The present invention relates to a kind of air-conditioning unit.
Background technology
Air-conditioning unit include indoor unit, outdoor unit and for connect indoor unit and
The pipeline of outdoor unit.Existing include embed ceiling split type including various types of rooms
Interior unit.
The split type indoor unit embedding ceiling generally includes: suck sky from rotation direction
Gas and the centrifugal fan from outer peripheral portion discharge air, and be used in outside around centrifugal wind
The heat exchanger with polygonal shape of fan.
Said structure is arranged so that from the air of centrifugal fan discharge relative in heat exchanger
Side surface or air flow into surface and are orientated obliquely, thus generate wind noise.It is known that, conventionally, should
Structure includes several rectification parts, these rectification parts from heat exchanger side towards centrifugal fan
Prominent to reduce wind noise.
Such as, Japanese Unexamined Patent Application publication No.Hei 11-325497 (patent document 1)
Disclose a kind of structure, in the structure shown here, rectification part be arranged in make centrifugal fan closest to
Near the position of heat exchanger, this allows the primary side surface barrier of rectification part from centrifugal fan
The air discharged, and allow the secondary side surface profit with smooth curved shape of rectification part
By wall attachment effect (Coanda effect), aforementioned air is directed to heat exchanger.
Japanese Unexamined Patent Application publication No.2003-269738 (patent document 2) discloses
A kind of air-conditioning unit, what it was arranged so that in the top and bottom of cowling panel is arranged in tool
Any one end on the indoor unit body of centrifugal fan is had to be positioned at the other end in fan direction of rotation
On anterior position at, and mid portion to rotation tilt.
Japanese Unexamined Patent Application publication No.2014-129994 (patent document 3) discloses
A kind of indoor unit of air-conditioning unit, it is configured with slope or step-like cowling panel,
So that the distance in top panel side between heat exchanger and cowling panel more than downside away from
From.
Summary of the invention
Normally used structure disclosed in patent document 1 have towards direction of rotation extend whole
Stream plate.
Normally used structure disclosed in patent document 2 discloses as being perpendicular to air inflow
The cowling panel of the surface plate on surface.In any aforementioned circumstances, cowling panel is used for stopping stream
A dynamic part is to reduce wind noise.But, aforementioned structure may produce at cowling panel rear
The region that air velocity is substantially reduced, causes heat exchange performance to reduce and air-supply power increases.
In normally used structure disclosed in patent document 3, cowling panel and air flow into
The angle that surface is formed changes on fan rotation axis line direction continuously.But, air flows
Direction according to the shape of centrifugal fan blade and shows with the position relationship of air outlet slit
Drastically change on fan rotation axis line direction.In the case, a part for cowling panel is permissible
Its direction is made significantly to deviate air-flow direction.As a result, flow and separate from the surface of cowling panel,
Improvement effect is caused to weaken.Meanwhile, there is step-like cowling panel and cause cowling panel and air stream
The distance entered between surface drastically changes near step shape part.This may be easily caused flowing
In turbulent flow.
It is an object of the invention to provide a kind of air-conditioning unit, described air-conditioning unit has
Including the indoor unit of centrifugal fan, indoor unit is configured at rectification part (cowling panel)
The upstream side of alar part and downstream all increase the static pressure of air, thus realize the reduction of air-supply power
Improvement with heat exchange performance.
The present invention provides a kind of air-conditioning unit with indoor unit, described indoor unit bag
Include: housing；Centrifugal fan, described centrifugal fan has hub, guard shield and the leaf being disposed there between
Sheet；And the indoor heat converter around described centrifugal fan, described housing comprises described centrifugal
Fan and described indoor heat converter.In described indoor unit, described indoor heat converter has
Having plane air to flow into surface, described air flows into surface and allows from described centrifugal fan
The air that air outlet slit is discharged flows into, and described air flows into surface and is provided with rectification part, described whole
Stream unit includes: supporting part, and described supporting part has and is fixed on described air and flows on surface
Insertion portion between fin；And alar part, described alar part have from described supporting part towards with
The shape that the direction that the direction of rotation of described centrifugal fan is contrary extends, described rectification part configures
Become to be blocked in one of the air flowed between described centrifugal fan and described air inflow surface
Point, and by described insertion portion and described alar part in the rotary shaft being orthogonal to described centrifugal fan
The angle formed in the plane of line be set at least to be parallel in hub side from described air outlet slit to
Described air flows into the air on surface and flows into, thus increases in upstream side and the downstream of described alar part
Add the static pressure of air.
According to the present invention, for air-conditioning unit, the indoor unit that includes centrifugal fan
In, it is possible to all increase air in the upstream side of alar part and the downstream of rectification part (cowling panel)
Static pressure.This reduction and improvement of heat exchange performance of making it possible to realize air-supply power, thus
To high efficiency air-conditioning unit.
Accompanying drawing explanation
Fig. 1 is the external perspective view of the split type indoor unit embedding ceiling；
Fig. 2 is the longitdinal cross-section diagram of the split type indoor unit of normally used embedding ceiling；
Fig. 3 is the view in transverse section of the indoor unit of the line A-A acquisition along Fig. 2；
Fig. 4 is the view in transverse section of the indoor unit of the line B-B acquisition along Fig. 2；
Fig. 5 is the view in transverse section of the indoor unit of the line C-C acquisition along Fig. 2；
Fig. 6 is the fragmentary, perspective view schematically showing heat exchanger；
Fig. 7 is the side view schematically showing the centrifugal fan according to the present invention；
Fig. 8 is the longitdinal cross-section diagram of the indoor unit according to first embodiment；
Fig. 9 is the view in transverse section of the indoor unit of the line D-D acquisition along Fig. 8；
Figure 10 is the fragmentary, perspective view of the rectification part according to first embodiment；
Figure 11 is the upward view of the rectification part according to first embodiment；
Figure 12 be along Fig. 8 line E-E obtain, in the rectification part according to first embodiment
The partial section in the flow field around part；
Figure 13 is the fragmentary, perspective view of the rectification part according to the second embodiment；
Figure 14 is the fragmentary, perspective view of the rectification part according to the 3rd embodiment；
Figure 15 is the side view of the rectification part according to the 4th embodiment；
Figure 16 is the upward view of the rectification part according to the 4th embodiment；
Figure 17 is the side view of the modified example of the rectification part according to the 4th embodiment；
Figure 18 is the longitdinal cross-section diagram of the indoor unit according to the 5th embodiment；
Figure 19 is the schematic diagram of the air-conditioning unit according to the present invention；
Figure 20 is the perspective view of the rectification part according to sixth embodiment；
Figure 21 is to represent that the rectification part (modified example of sixth embodiment) according to the present invention is arranged
The perspective view of the state on indoor unit；
Figure 22 is the perspective view of the modified example of the rectification part according to sixth embodiment；And
Figure 23 is the perspective view of another modified example of the rectification part according to sixth embodiment.
Detailed description of the invention
Describe the indoor unit according to the present invention with reference to the accompanying drawings in detail.
Fig. 1 to Fig. 5 illustrates normally used, the application present invention, embedding ceiling
The example of split type indoor unit 90.Fig. 1 is external perspective view.Fig. 2 is to include that fan rotates
The longitdinal cross-section diagram of the unit of axis.Fig. 3 to Fig. 5 is line A-A, B-B respectively along Fig. 2
The view in transverse section obtained with C-C.
Accompanying drawing shows housing 1, panel 2, electric part box 3, bellmouth 4, centrifugal fan
5, motor 6, axostylus axostyle 7, heat exchanger (indoor heat converter) 8, drip tray 9, dividing plate 10,
The rotation 30 of air outlet 211 and centrifugal fan 5.Referring to the drawings, solid arrow represents
The direction of rotation of centrifugal fan 5, dotted arrow represents air-flow direction.Additionally, with reference to figure
3 to Fig. 5, is represented the position of air outlet 211 by each rectangle of dotted lines.
Housing 1 include constitute side surface side plate 101, for cover top surface top board 102,
And for covering the heat-barrier material 103 of the inner side of side plate 101 and top board 102.Housing 1 is embedding
Enter in ceiling, so that the downwardly directed house interior in the surface of panel 2.
For being located at the panel 2 of the bottom being arranged in housing 1 from the grid 201 of indoor suction
Center.Filter 202 is arranged on grid 201 for dedusting from air.As four
The air outlet 211 of individual elongated rectangular aperture is each provided at, at the periphery of grid 201, being in by sky
Air at a temperature of controlled atmosphere joint unit 90 regulation is fed in room by described air outlet.Often
One air outlet 211 is designed with the wind deflector 203 for regulating blow air direction.
In the inside of housing 1, it is provided with the electrical part of control panel (not shown) in storage room
Part case 3, for by from grid 201 inlet guide to centrifugal fan 5 bellmouth 4, use
Air inlet in spinning in future axis direction is discharged to the centrifugal fan 5 of outer peripheral portion, for driving
Move the motor 6 of centrifugal fan 5, for connecting the axostylus axostyle 7 of centrifugal fan 5 and motor 6, being used for
Carry out between air and the cold-producing medium that centrifugal fan 5 is discharged heat exchange heat exchanger 8,
And be arranged in below heat exchanger 8 for receiving during refrigerating operation at heat exchanger 8
The drip tray 9 of the condensed water of middle generation.
Such as, the heat exchanger 8 of the cross-fin cast that figure 6 illustrates includes parallel to each other
Multiple U-shaped heat-transfer pipes 801 of arranging, along the axis direction of heat-transfer pipe 801 with generally uniform
Spaced apart a large amount of lamellar fin 802 and for heat-transfer pipe 801 is connected to each other
Multiple return bends 803.Heat-transfer pipe 801 through fin 802 expand thus with fin 802
It is in close contact.It is logical in flowing that this makes it possible to the wall surface via heat-transfer pipe 801 and fin 802
Cross the cold-producing medium of heat-transfer pipe 801 and flow by carrying out between the air in the gap between fin 802
Heat exchange.
With reference to Fig. 3, the heat exchanger 8 of indoor unit 90 bend to the most pentagonal shape with
Around centrifugal fan 5.The two ends of heat exchanger 8 are connected with dividing plate 10.For storing expansion
The Machine Room 20 of valve (not shown) etc. is limited by dividing plate 10 and housing 1.
Fig. 7 represents that the example of centrifugal fan 5, described centrifugal fan include hub 501, at fan
Guard shield 502 relative with hub 501 on rotation direction and in a circumferential direction with uniformly
The blade 503 that interval is arranged between hub 501 and guard shield 502.
Hub 501 has in center for centrifugal fan 5 is fixed to the lug boss of axostylus axostyle 7 (not
Illustrate).Meanwhile, guard shield 502 has in center for from the direction air inlet of fan rotation axis line
Circular open i.e. air intake 521.
Blade 503 is twisted (S-shaped), and on the direction contrary with fan direction of rotation
Tilt.The trailing edge 511 (trailing edge of blade 503) seen from outer circumferential side has the point of inflection,
At the described point of inflection, shape becomes spill along fan rotation axis line direction from convex.Reference
Accompanying drawing, the height of the point of inflection of trailing edge is indicated by line p-p.For discharging the air of air
Outlet 522 is formed between two adjacent blades 503 at outer peripheral portion.
Use dotted arrow is described air flowing.
Once being driven centrifugal fan 5 to rotate by motor 6, room air is just by grid 201 quilt
Suck indoor unit 90, as in figure 2 it is shown, and through filter 202 and bellmouth 4 it
After be inhaled into centrifugal fan 5.The air boosted by centrifugal fan 5 is from the periphery of centrifugal fan 5
Part is discharged, and inflow heat exchanger 8.Heat exchanger 8 is configured to pass through fin in flowing
Heat exchange is carried out between air and the cold-producing medium flowed in heat-transfer pipe 801 of 802, for
Carry out heating or refrigerating operation.Air is subsequently through the portion limited by housing 1 and drip tray 9
It is fed into indoor from air outlet 211 after/.
Fig. 3 to Fig. 5 is perpendicular to the view in transverse section of fan rotation axis line, all illustrate from from
Heart fan 5 is to the air flowing of heat exchanger 8.Corresponding sectional view represents centrifugal fan 5
Between hub and the point of inflection of trailing edge (corresponding to Fig. 3), the point of inflection of trailing edge and centrifugal
Each (corresponding to Fig. 5) (corresponding to Fig. 4) and below guard shield between the guard shield of fan 5
Stage.
In either case, air-flow direction relative to the fin of heat exchanger 8 towards fan
Direction of rotation tilts.Make centrifugal fan 5 closest to the position of heat exchanger 8 at fan
This phenomenon will be it is frequently observed that at anterior position in direction of rotation.The plane sky of heat exchanger
Gas flows into surface 8b, 8d, 8f, 8h and more likely exists compared to surface 8a, 8c, 8e, 8g
Turbulent flow is generated between fin.This may interfere with air and flows into, and causes the air capacity passed through less.
As a result, velocity flow profile becomes uneven on the peripheral direction of heat exchanger 8, thus increases sky
Flow of air loss and air-supply power, cause heat exchange performance to reduce.
The air-flow direction affected by the blade shape of centrifugal fan 5 is bent in the change of trailing edge
Position near the height of point changes significantly.Specifically, by including fan rotation axis line
The air-flow direction of longitdinal cross-section diagram instruction becomes big above the point of inflection indicated from line p-p
Cause level, as shown in Figure 2.Meanwhile, in air-flow direction region below the point of inflection to
Have a down dip oriented diagonally.As be perpendicular to fan rotation axis line view in transverse section (that is, Fig. 3 and
4) as clearly illustrating in, when below the point of inflection, it is parallel to the air of heat exchanger 8
The velocity component flowing into surface becomes big.This can increase the inclined angle alpha relative to fin, such as figure
Shown in 3.
Air-flow direction also between the hub and the point of inflection of trailing edge of centrifugal fan 5 or
Person slightly changes between the point of inflection and the guard shield of centrifugal fan 5 of trailing edge.But, this
The change of sample is much smaller than the change occurred around the point of inflection of trailing edge.
Air-flow direction according to the position relationship with centrifugal fan 5 arrange guard shield height
Significantly change near position.In region below guard shield, the direction is by guard shield and bellmouth
The vortex generated between 4 affects consumingly.Thus obtained enter one relative to the inclination angle of fin
Step increases, as it is shown in figure 5, so that air-flow direction becomes being roughly parallel to about
Air flows into surface.
As it has been described above, the air-flow direction height in the point of inflection of trailing edge and the height of guard shield
Significantly change near degree.As a result, the velocity flow profile on fan rotation axis line direction is uneven,
Cause increase and the reduction of heat exchange performance of air-supply power.
In the present invention, rectification part is formed to adapt to the shape of the change of air-flow direction,
To reduce air-supply power and improving heat exchange performance.Retouch in detail hereinafter with reference to accompanying drawing
State the preferred embodiments of the present invention.
[first embodiment]
With reference to Fig. 8 to Figure 11, the first embodiment of the present invention will be described.Fig. 8 is to include that fan revolves
The longitdinal cross-section diagram of the indoor unit 91 of shaft axis.Fig. 9 is the line D-D acquisition along Fig. 8
The view in transverse section of indoor unit 91.Figure 10 is the enlarged perspective of rectification part 920.
Figure 11 is the upward view of the rectification part 920 seen from the direction indicated by the arrow Z of Figure 10.
In the accompanying drawings, line s-s, p-p, q-q and t-t indicate respectively centrifugal fan 5 hub position,
The shape of trailing edge becomes the point of inflection position of spill, the upper end position of guard shield from convex and protects
The lower end position of cover.Reference 811 indicates the air of heat exchanger 8 to flow into surface.
Rectification part 920 include lamellar supporting part 931, from one end of supporting part 931 towards
The direction contrary with fan direction of rotation extends and tilts with angle, θ 2 relative to supporting part 931
Lamellar alar part 932, from one end of supporting part 931 towards contrary with fan direction of rotation
Direction extend and tilt with angle, θ 4 relative to supporting part 931 lamellar alar part 934, from
One end of supporting part 931 extends for the alar part 933 connecting alar part 932 and 934, arranges
Rib 935 between the inner surface of supporting part 931 and alar part 932 and be arranged in supporting part
Rib 936 between 931 and the inner surface of alar part 934.
Gap between supporting part 931 is processed to than fin is thinner, and supporting part 931 is from air
Flow into surface 811 to insert in fin, and by being assembled together with heat-exchange tube or passing through
It is attached to fin and is fixed to heat exchanger 8.A part for supporting part 931 flows into table from air
Face 811 is prominent to centrifugal fan 5, is used for being blocked in alar part 932,933,934 and air stream
Enter the inflow air between surface 811.Longitudinal size L1 along fan rotation axis line direction
Less than the distance between height i.e. line s-s and t-t of centrifugal fan 5.
The space that alar part 932 and air flow between surface 811 gradually becomes towards supporting part 931
Narrow.The end at fan side of alar part 932 and air flow into surface 811 and are spaced with distance H2
Open.Alar part 932 is slightly less than by centrifugal wind along the longitudinal size L2 in fan rotation axis line direction
Distance between height i.e. line s-s and p-p that the hub of fan 5 and the point of inflection of trailing edge limit.
The space that alar part 934 and air flow between surface 811 gradually becomes towards supporting part 931
Narrow.It is spaced apart with distance H4 that alar part 934 flows into surface 811 in the end of fan side with air.
Alar part 934 is arranged in the height of the point of inflection of the trailing edge indicated by line p-p and by line t-t
Between the lower end of the guard shield of instruction.So, alar part 934 indulging along fan rotation axis line direction
Distance between size L4 is less than line p-p and t-t.
Alar part 933 by relative to the angle of supporting part 931 in the way of θ 2 gradually decreases to θ 4
It is arranged between the lower end of alar part 932 and the upper end of alar part 934.
Rib 935 is arranged between the inner surface of supporting part 931 and alar part 932 with fixed angle θ 2.
Rib 936 is arranged between the inner surface of supporting part 931 and alar part 934 with fixed angle θ 4.
With reference to Fig. 9, each in rectification part 920a, 920b, 920c and 920d is respectively
It is arranged in and make centrifugal fan 5 to open preset distance closest to the location interval of heat exchanger 8
The plane air of heat exchanger flows on corresponding one in surface 8b, 8d, 8f and 8h.
As shown in Figure 8, supporting part 931 is roughly parallel to fan rotation axis line direction, its upper end with from
The much the same height of hub of heart fan 5.The lower end of alar part 932 is after the blade indicated by line p-p
The elevation-over of the point of inflection of edge, and the upper end of alar part 934 is in the point of inflection of trailing edge
Below height.The lower end of alar part 934 is positioned at the upper end of the guard shield indicated by line q-q and by line
Between the lower end of the guard shield of t-t instruction.
Will be described below the operation of rectification part 920.
Figure 12 represents rectification part 920 in the partial section obtained along the line E-E of Fig. 8
Flow field around.From centrifugal fan 5 discharge air be divided into two-way air-flow, i.e. along by
The air-flow F1 that the path that the air flow surface 811 of alar part 932 and heat exchanger 8 limits is transmitted,
And skim over the air-flow F2 that alar part 932 is sent to the rear of rectification part 920.
Air-flow F1 slows down under the influence of alar part 932, changes flow direction, and quilt simultaneously
Supporting part 931 stops.So, the kinetic energy of air-flow F1 is partly converted into static pressure, and it increases
Upstream side at air flux surface (not shown) He the position being arranged in supporting part 931
Heat exchanger 8 air flow into surface 811 a part between differential static pressure, thus increase
Amount through the air of heat exchanger 8.It addition, air-flow direction by alar part 932 change with
Reduce the inclined angle alpha relative to fin, so suppress the turbulent flow generated between fin, by
This reduces flow losses.
Being different from the situation not arranging rectification part 920, air flows into the sky near surface 811
Gas velocity is delayed by the region be arranged in the downstream of position of supporting part 931.By
This static pressure obtained uprises, and promotees to allow air to flow into heat exchanger.
Air through heat exchanger flows into every portion of air amount of surface 8a, 8c, 8e, 8g
Subtract along with the increase of the every portion of air amount through air inflow surface 8b, 8d, 8f, 8h
Little.Velocity flow profile in the circumference of heat exchanger is correspondingly enhanced, and this makes it possible to reduce
Air-supply power and improve heat exchange performance.
The present invention has feature as described below, so that coming from the effect of rectification part 920
Bigization.
(1) rectification part 920 makes the angle, θ 2 formed by alar part 932 and supporting part 931
More than the angle, θ 4 formed by alar part 934 and supporting part 931.
One denier air flowing separates from alar part surface, just occurs turbulent flow in flowing, in rectification part
The rear of part generates the significantly reduced region of flow velocity.Such region can cause power of blowing
Increase and the reduction of heat exchange performance.Therefore it is necessary to make alar part direction and air-flow direction phase
Consistent to solve the problems referred to above.
Meanwhile, the air-flow direction strongly affected by the alar part shape of centrifugal fan 5 exists
Change significantly near the point of inflection of trailing edge.Region below the point of inflection of trailing edge
In, flowing is flowed relative to wing than in the region above the point of inflection relative to the inclination angle of fin
The inclination angle of sheet is big.Therefore, alar part and supporting part the angle formed is bent in the change of trailing edge
Position change near the height of point, so that alar part direction is consistent with air-flow direction.
(2) it is arranged in the alar part 933 between alar part 932 and 934 to be formed with supporting part 931
Angle be gradually changed into θ 4 from θ 2.
The drastically change of the angle formed by alar part and supporting part will generate ladder on alar part surface
Shape part, is likely to turbulent flow occur near step shape part.Alar part 933 allows the table of alar part
Face smooths, and has the velocity component on fan rotation axis line direction for induction air.This
Make it possible to the generation of suppression turbulent flow.
(3) lower end of alar part 934 is above the lower end of the guard shield of centrifugal fan 5.
In the region of the lower section of guard shield, the air being parallel to heat exchanger flows into the speed on surface
Component is strengthened significantly, as it is shown in figure 5, and flow into, at air, the air that near surface flows
Direction of advance the most almost parallel.The direction of the alar part 934 owing to being arranged in above-mentioned zone
Significantly different with air-flow direction, therefore flowing will separate from alar part surface, cause disadvantageous
Impact.
(4) rib 935 and 936 is arranged to fixing respectively by alar part 932 and supporting part 931
And the angle, θ 2 and θ 4 formed by alar part 934 and supporting part 931.
Generally, resin has the rectification part 920 of relatively small thickness for being formed, and this may lead
Cause the risk being easily deformed in periods such as assembly works.Rib is set to strengthen rectification part 920
Intensity, thus the fixing angle formed by alar part and supporting part.
(5) rectification part 920 is arranged in the position making centrifugal fan 5 closest to heat exchanger 8
Anterior position (downstream) place in fan direction of rotation put, so that supporting part 931
Rigging position meet relational expression 0.2G < W < 0.5G.Reference marker W represents supporting part 931
Insertion portion make centrifugal fan 5 and heat exchanger 8 (room with flowing on surface 811 at air
Inside heat exchanger) between distance be the distance between the shortest position.Reference marker G represents
Air flow into surface 811 make centrifugal fan 5 and heat exchanger 8 (indoor heat converter) it
Between distance be at the anterior position in the direction of rotation of centrifugal fan 5 of the shortest position
End and to make this distance be that (air flows into the level on surface 811 for distance between the shortest position
Direction).The angle, θ 2 formed by alar part 932 and supporting part 931 equals to or less than 135 °, and
And the angle, θ 4 formed by alar part 934 and supporting part 931 is equal to or less than 115 °.
Flow at air and supporting part 931 is set near the position that the static pressure on surface is minimum by offer
The more preferable improvement effect of rectification part 920.According to the analysis result performed in the present invention,
The static pressure distribution that air flows on surface can be affected by various factors.Static pressure makes centrifugal wind
Fan 5 is closest at the anterior position in fan direction of rotation of the position of heat exchanger 8
Being minimum in region, wherein said distance is in the range of 0.2G to 0.5G.
Flow medium relative to the inclined angle alpha of fin region above the point of inflection of trailing edge
In or more than in 45 °, and the region below the point of inflection of trailing edge equal to or more than 65 °.
By the angle, θ 2 formed by alar part 932 and supporting part 931 is set equal to or is less than
135 °, and the angle, θ 4 formed by alar part 934 and supporting part 931 is set equal to or little
In 115 °, alar part can be orientated to consistent with air flowing.
In this embodiment, the plane air of heat exchanger flows into surface 8b, 8d, 8f, 8h
In be each provided with single rectification part.It can be considered that improvement effect, manufacturing cost etc. are come
The quantity of regulation rectification part.The rigging position of each of rectification part shape and supporting part is not
Must be identical, but can be set independently.The fan side end of alar part and air flow into table
Gap H2 and H4 between face can be set as equal.However, it is possible to they are set as not
With, so that the improvement effect of rectification part maximizes.
[the second embodiment]
In this embodiment, with the same parts described in first embodiment by with identical mark
Represent, and therefore will omit its explanation, thus will hereinafter main explain and the first enforcement
The difference of example.
Figure 13 represents according to the second embodiment of the present invention.The supporting part 931 of rectification part 921
Having rectangular aperture 941,942, the air of alar part and heat exchanger flows between surface 811
Flow into air flow to the rear of supporting part 931 with passing through described rectangular opening section.So,
Even if assigned direction is deviateed in alar part direction due to rigging error, it is also possible to suppression flow velocity significantly drops
Low region.The regulation quantity of opening, size and position thereof are to allow to control fan rotation axis line
Static pressure improvement effect on direction.
[the 3rd embodiment]
According to the third embodiment of the invention Figure 14 represents.This embodiment and the district of first embodiment
It is not that supporting part 931 has the lamellar part 951 of extension at lower end.Air flows into table
The part in moving air near face 811 is blocked in the region below centrifugal fan 5,
So that through heat exchanger portion at the anterior position of the rigging position of lamellar part 951
The air capacity divided increases together with static pressure.Meanwhile, lamellar part 951 flows into surface from air
The height of 811 prominent parts is the lowest.This makes it possible to the suppression flow velocity at this part rear
Reduce.As a result, it is possible to further enhance the improvement effect of rectification part.
[the 4th embodiment]
Figure 15 and 16 represents according to the fourth embodiment of the invention.Figure 15 is to see from fan side
The side view of rectification part 923, and Figure 16 is from the side indicated by the arrow Y of Figure 15
Upward view to the rectification part 923 seen.Figure 16 illustrates the air stream of heat exchanger 8
Enter surface 811.The position of the hub of centrifugal fan 5, line p-p is represented with reference to Figure 15, line s-s
Representing that the shape of trailing edge becomes the point of inflection of spill from convex, line q-q represents the upper of guard shield
Hold, and line t-t represents the lower end of guard shield.Solid arrow in accompanying drawing represents centrifugal fan 5
Direction of rotation.
Rectification part 923 includes flowing into surface 811 towards prominent thin of centrifugal fan 5 from air
Plate-like support portion 961,963,965, on the direction contrary with fan direction of rotation from support
The lamellar wing that the one end in portion 961 extends and tilts with angle, θ 4 relative to supporting part 961 simultaneously
Portion 962, on the direction contrary with fan direction of rotation from one end of supporting part 965 extend and
The lamellar alar part 966 that simultaneously tilts with angle, θ 2 relative to supporting part 965, from supporting part 963
One end extend with connect alar part 962 and 966 alar part 964, be arranged in supporting part 961 and
Rib 967 between the inner surface of alar part 962 and be arranged in supporting part 965 and alar part 966
Inner surface between rib 968.
The difference of this embodiment and first embodiment essentially consists in the supporting part of rectification part 923
965 are roughly parallel to supporting part 961, and to prelocalization in fan direction of rotation.Supporting part
963 tilt relative to supporting part 961 and 965, are connected to the lower end of supporting part 961 simultaneously
The upper end of supporting part 965.
In indoor unit, air-flow direction is anxious near the height of the point of inflection of trailing edge
Drastic change, this makes the inclination angle of flowing bigger for the fin in lower area.Therefore,
The static pressure distribution that air flows on surface 811 becomes near the height of the point of inflection of trailing edge
Change, so that the position of minimum static pressure and make centrifugal fan 5 closest to the position of heat exchanger 8
Distance between putting is shorter in lower area.On the other hand, owing to being derived from changing of rectification part
Enter effect and depend on the rigging position of supporting part, therefore by using permission to be assemblied in by supporting part
The rectification part 923 of the minimum static pressure position on fan rotation axis line direction can obtain more preferably
Improvement effect.
As shown in figure 17, it is arranged in trailing edge by being separately manufactured into by rectification part 924
The point of inflection above region in and rectification part 925 be separately manufactured into be arranged in change
In region below bent point and assemble these rectification parts to configure the modified example of this embodiment.
Owing to the corresponding rectification part of the two 924,925 does not have the configuration of complexity, therefore they are easy
In manufacture.Each supporting part does not has the shape of complexity, thus allows to be easy to set up rectification part
Part 924,925.
[the 5th embodiment]
Figure 18 is to represent longitdinal cross-section diagram according to the fifth embodiment of the invention.This embodiment with
The difference of first embodiment essentially consists in the upper end position of alar part.In other words, rectification part 926
The upper end of alar part be located below the level of hub of centrifugal fan 5.
In indoor unit 92, the heat-insulating material 97 in top panel side is provided with ledge 99 (absolutely
The reinforcement of hot material).Vortex will be formed at outer surface and the heat exchange of ledge 99
The air of device 8 flows in the space n between surface and generates.In the case, first it is similar to
Embodiment, if the upper end of alar part is positioned at the level identical with hub, then vortex will with at alar part
Upper end generate separation flowing interference, therefore interrupt enter heat exchanger space-oriented
Flowing in the part of n.This may increase air-supply power and reduce heat exchange performance.For
Avoiding drawbacks described above, the upper end of alar part is positioned to separate with space n with preset distance.
[sixth embodiment]
Figure 20 is the perspective view representing rectification part according to the sixth embodiment of the invention.
Whole than described in the first to the 5th embodiment of the structure of the rectification part 351 shown in figure
Stream unit is simpler.
Rectification part 351 includes the alar part 352 of the air outlet corresponding to fan and corresponds to
The alar part 353 of fan shroud.Rectification part 351 includes supporting part 391, insertion portion 356,
357 and grip part 354,355.Supporting part 391 is bending, so that the side of alar part 352
To adapting to the flowing inclined angle alpha relative to fin.Insertion portion 356,357 inserts between fin
And fixed.Grip part 354,355 is configured to be grasped to contribute to easily setting by operator
Put rectification part 351.As it can be seen, grip part 354 has the plate-like shape being prone to grasping,
And grip part 355 has bar-like shape.
The top 358 of supporting part 391 is configured to and is formed at the exhausted of the housing for indoor unit
Sunk part in hot material matches.
Alar part 352 is configured to the inclined angle alpha adapting to flowing relative to fin, in order to corresponding to height
The fan air-supply mouth of air velocity.The width being positioned in the region that air velocity is relatively low is less
Alar part 353 allow to loosen the restriction to angle.It is possible to be similar to the configuration of alar part 352 ground
Become to be suitable for inclined angle alpha.
Figure 21 is to represent the perspective view that the rectification part according to the present invention is arranged in indoor unit.
The figure shows the inner side of the heat exchanger 8 seen from below.
The shape of rectification part 371 is slightly different with rectification part 351 as shown in figure 20, but
It is the most essentially identical.Grip part 372,373 differently configured in as shown in figure 20
Configuration.
The top 358 of rectification part 371 by with the thermal insulation being formed at the housing for indoor unit
Sunk part 361 in material 103 matches.
Figure 22 is the zoomed-in view of the rectification part 371 shown in Figure 21.
Rectification part 371 has the alar part 352,353,393 being fixed to supporting part 391.
Alar part 352 can be retouched in the way of being similar to reference to Figure 20 alar part as above
Stating, it is corresponding to the region of more upper air current speed.
Describe with reference to the accompanying drawings by dotted line around each section I to IV in each.
Section I fan air-supply mouth positioned near heat-insulating material (its as indoor
The inwall of the housing of unit) region in.In this section, air velocity reduces.So,
Alar part 393 is configured to make its width divide reduction towards top.
Section II is positioned in the region that air velocity is relatively low, and is configured to make its width
Reduce downwards.
Air flow barrier owing to needing the air preventing from being parallel to heat exchanger to flow into surface exists
The downstream of alar part arrives the air of heat exchanger and flows into, and therefore section III is used for reducing alar part
Width.
Corresponding in the section IV of fan shroud, air velocity is low.Less it is necessarily increased
The width of alar part 353, and therefore, alar part width is less.
Figure 23 is the perspective view of another modified example of rectification part.
Rectification part 381 has the alar part 382,383,384 being fixed to supporting part 391.
Alar part 382 can be retouched in the way of being similar to reference to Figure 20 alar part as above
Stating, it is corresponding to the region of more upper air current speed.
Section I shown in figure makes alar part at the even width of the office, top of rectification part 381
Ground keeps less rather than is gradually reduced width.
With reference to section II, the width of alar part 383 strongly reduces downwards, and alar part 384 makes width
Degree keeps less equably.
Section III has long part, and it has compared to the part shown in Figure 22 protects equably
Hold less alar part width.
Section IV has the part arranged in parts the most shown, and this part has
There is the alar part width keeping less equably.
In first embodiment to sixth embodiment, described the heat exchange of cross-fin cast
Device.But, any other type of heat exchanger (such as concurrent flow ejector half heat exchanger) is also
It is applicable.Tilt as long as air flowing flows into surface relative to the air of heat exchanger, appoint
The indoor unit of what type is all available, it is not necessary to be confined to embed the split type indoor of ceiling
Unit.
Air-conditioning unit is described below structurally and operationally.
Figure 19 is the schematic diagram of the structure representing the air-conditioning unit according to the present invention.
Referring to the drawings, air-conditioning unit 300 include the compressor 302 for compressing cold-producing medium,
Indoor heat converter 303, expansion valve 304, outdoor heat converter 305 and cross valve 306,
They are connected via refrigerant tubing 311,312,313,314,315,316.Can pass through
Switching cross valve 306 and from refrigeration and heat middle selection air conditioning operation.
In refrigerating operation, from compressor 302 discharge cold-producing medium through refrigerant tubing 311,
Cross valve 306 and refrigerant tubing 312, as depicted by the solid-line arrows, thus handed over by outdoor heat
Parallel operation 305 is to outdoor air heat release.Then, cold-producing medium further pass through refrigerant tubing 313,
Expansion valve 304 and refrigerant tubing 314, thus by indoor heat converter 303 from Interior Space
Aspiration heat.Cold-producing medium passes refrigerant tubing 315, cross valve 306 and refrigerant tubing 316,
And return to compressor 302.
Meanwhile, in heating operation, the cold-producing medium discharged from compressor 302 passes refrigerant pipe
Road 311, cross valve 306 and refrigerant tubing 315, as the dotted line arrows, thus pass through room
Inside heat exchanger 303 is to room air heat release.Cold-producing medium further pass through refrigerant tubing 314,
Expansion valve 304 and refrigerant tubing 313, thus by outdoor heat converter 305 from outdoor empty
Aspiration heat.Cold-producing medium passes refrigerant tubing 312, cross valve 306 and refrigerant tubing 316,
And return to compressor 302.
The heat pump functional that specification utilizes the compression by cold-producing medium and expansion to realize explains air
Regulation unit, as with reference to described in Figure 19.But, the invention is not restricted to above description.Logical
Crossing and cold water or hot water are fed to indoor heat converter, the present invention also also apply be applicable to the system of indoor
Cold and heating operation.
Claims (15)
1. having an air-conditioning unit for indoor unit, described indoor unit includes:
Housing；
Centrifugal fan, described centrifugal fan has hub, guard shield and is arranged between hub and guard shield
Blade；And
Around the indoor heat converter of described centrifugal fan,
Described housing comprises described centrifugal fan and described indoor heat converter,
Wherein, described indoor heat converter has plane air inflow surface, described air
Flowing into surface allows the air discharged from the air outlet slit of described centrifugal fan to flow into,
Described air flows into surface and is provided with rectification part,
Described rectification part includes: supporting part, and described supporting part has and is fixed on described air stream
Enter the insertion portion between the fin on surface；And alar part, described alar part has from described
The shape that support part extends towards the direction contrary with the direction of rotation of described centrifugal fan, described whole
Stream unit is configured to be blocked in described centrifugal fan and described air flows into the sky of flowing between surface
A part for gas, and
It is being orthogonal to the rotation of described centrifugal fan by described insertion portion and described alar part
The angle formed in plane is set at least be parallel to from described air outlet slit to described in hub side
Air flows into the air on surface and flows into, thus increases sky in upstream side and the downstream of described alar part
The static pressure of gas.
Air-conditioning unit the most according to claim 1,
Wherein, described supporting part and described alar part shroud be configured to increase be parallel to described
The static pressure of the air that the side on air inflow surface flows up.
Air-conditioning unit the most according to claim 1,
Wherein, the curve of the trailing edge of the described blade seen from the outer circumferential side of described centrifugal fan exists
There is in the direction of rotation of described centrifugal fan the point of inflection, thus have the protuberance in hub side and
Recess in shroud.
Air-conditioning unit the most according to claim 1,
Wherein, relative to the height of the point of inflection as border, the angle in hub side is different from
The angle of shroud.
Air-conditioning unit the most according to claim 1,
Wherein, described indoor heat converter has polygonal shape.
Air-conditioning unit the most according to claim 5,
Wherein, each air inflow surface constituting polygonal shape is respectively equipped with each rectification part.
Air-conditioning unit the most according to claim 1,
Wherein, described supporting part have for make described alar part and described air flow into surface it
Between the opening of a part of flow further downstream of leaked-in air.
Air-conditioning unit the most according to claim 1,
Wherein, the end in shroud of described alar part is positioned to the air intake than described guard shield
Closer to hub side.
Air-conditioning unit the most according to claim 1,
Wherein, the insertion portion of described supporting part is arranged in and makes described centrifugal fan and described indoor
The position that distance between heat exchanger is the shortest in the direction of rotation of described centrifugal fan before
Position, side.
Air-conditioning unit the most according to claim 1,
Wherein, each rectification part includes multiple insertion portion, and these insertion portions are in institute
State and there is in the direction of rotation of centrifugal fan identical coordinate.
11. air-conditioning units according to claim 9,
Meeting the relational expression of 0.2G≤W≤0.5G, wherein, W represents the insertion of described supporting part
Partly and at described air flow into and make between described centrifugal fan and described heat exchanger on surface
Distance is the distance between the shortest position, and G represents that described air flows into surface making
State the distance between centrifugal fan and described heat exchanger be the shortest position at described centrifugal wind
Fan direction of rotation on anterior position at end with make described centrifugal fan and described heat exchange
Distance between device is the distance between the shortest position.
12. air-conditioning units according to claim 1,
Wherein, described insertion portion and described alar part it is different from the angle that hub side is formed and is protecting
The angle that cover side is formed；And
Alar part is disposed at different angles between two described alar parts and is thus connected to the two wing
Portion.
13. air-conditioning units according to claim 1,
Wherein, described insertion portion and described alar part the angle formed in hub side equals to or less than
135°。
14. air-conditioning units according to claim 13,
Wherein, described insertion portion and described alar part the angle formed in shroud is equal to or little
In 115 °.
15. air-conditioning units according to claim 1,
Wherein, described supporting part on the rotation direction of described centrifugal fan than described alar part
Longer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-017048 | 2015-01-30 | ||
| JP2015017048A JP2016142431A (en) | 2015-01-30 | 2015-01-30 | Air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105864885A true CN105864885A (en) | 2016-08-17 |
Family
ID=56554008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510956308.8A Pending CN105864885A (en) | 2015-01-30 | 2015-12-18 | Air conditioning unit |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20160223211A1 (en) |
| JP (1) | JP2016142431A (en) |
| CN (1) | CN105864885A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360137A (en) * | 2018-04-10 | 2019-10-22 | 开利公司 | HVAC fan air inlet |
| CN113227667A (en) * | 2018-11-21 | 2021-08-06 | 递安智能微气候合资公司 | Compact air supply ventilation system |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3225934A4 (en) * | 2014-11-28 | 2018-08-08 | Hitachi-Johnson Controls Air Conditioning, Inc. | Indoor unit for air conditioner |
| JP6381782B2 (en) * | 2015-03-27 | 2018-08-29 | 三菱電機株式会社 | Air conditioner indoor unit |
| JP2017053588A (en) * | 2015-09-11 | 2017-03-16 | ジョンソンコントロールズ ヒタチ エア コンディショニング テクノロジー（ホンコン）リミテッド | Air conditioner and its indoor unit |
| JP2018025355A (en) * | 2016-08-10 | 2018-02-15 | 日立ジョンソンコントロールズ空調株式会社 | Indoor unit and air conditioner |
| AU2018288739B2 (en) * | 2017-06-23 | 2021-07-08 | Daikin Industries, Ltd. | Air conditioning indoor unit |
| JP7005355B2 (en) * | 2018-01-19 | 2022-02-10 | 三菱重工サーマルシステムズ株式会社 | Air conditioner |
| CN207907312U (en) * | 2018-01-31 | 2018-09-25 | 宁波方太厨具有限公司 | A kind of air exhausting structure of range hood |
| WO2020039547A1 (en) * | 2018-08-23 | 2020-02-27 | 三菱電機株式会社 | Heat exchanger unit, and refrigeration cycle device |
| EP3647603A1 (en) | 2018-10-31 | 2020-05-06 | Carrier Corporation | Arrangement of centrifugal impeller of a fan for reducing noise |
| CN110296523B (en) * | 2019-07-01 | 2022-04-19 | 珠海格力电器股份有限公司 | Spoiler for improving fixing reliability and air conditioning unit using same |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20160223211A1 (en) | 2016-08-04 |
| JP2016142431A (en) | 2016-08-08 |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160810 Address after: Hongkong, China Applicant after: Johnson Controls Hitachi air conditioning technology (Hongkong) Co., Ltd. Address before: Tokyo, Japan Applicant before: Hitachi Appliances Inc. |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180710 Address after: Tokyo, Japan, Japan Applicant after: Hitachi Johnson Controls Air Conditioning Co., Ltd. Address before: Hongkong, China Applicant before: Johnson Controls Hitachi air conditioning technology (Hongkong) Co., Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160817 |