CN205137695U - Air -conditioning indoor unit - Google Patents

Abstract

The utility model provides an air -conditioning indoor unit, include: the casing that has first air intake and air outlet, and centrifugal fan, set up the upper portion at the inside accommodation space of casing. Centrifugal fan includes the spiral case and sets up the impeller in the spiral case that wherein the spiral case includes spiral case antetheca and spiral case perisporium, the fan air intake with first air intake intercommunication is seted up to the spiral case antetheca, and the spiral case perisporium includes the spiral sector section for impeller outline flaring, and the both ends difference downwardly extending of spiral sector section goes out snail tongue district section and exit zone, the projection of snail tongue district section in perpendicular to centrifugal fan rotation axis's plane is convex snail tongue projection line, the projection of impeller outline in aforementioned plane is circular shape impeller projection line, and the contained angle that the line in the centre of a circle of the centre of a circle of snail tongue projection line and impeller projection line and the centre of a circle from the impeller projection line were faced between the horizontal line of the direction extension of being close snail tongue projection line is 70~80. The utility model discloses air -conditioning indoor unit not only air output is big, and the noise is minimum moreover.

Description

Indoor apparatus of air conditioner

Technical field

The utility model relates to air-conditioning technique field, particularly relates to a kind of indoor apparatus of air conditioner.

Background technology

Existing indoor apparatus of air conditioner is when blowing, the air outlet that wind after heat exchanger heat exchange is directly offered from air-conditioning under the effect of fan inside blows out, therefore blown out wind is all heat exchange wind, namely the wind blown out or entirely for hot blast, or be cold wind entirely, such wind directly blows and people can be allowed to feel extremely uncomfortable on the health of people.

In addition, the snail tongue of the centrifugal blower volute of existing indoor apparatus of air conditioner is designed to shallow tongue more, causes impeller to expose more, thus can produce backflow phenomenon when vane rotary, fan performance is reduced.Meanwhile, the flow angle flowing out the gas of impeller can be bigger than normal, and gas can along the outside deflection in snail shell coiling direction, directly flow to air outlet, make spiral case air-out enter tongue place and produce negative pressure, be degrading the airflow state that tongue place is entered in air-out, and noise can be made to raise, affect the result of use of user.

Utility model content

An object of the present utility model is to overcome above-mentioned at least one defect of the prior art, provides a kind of indoor apparatus of air conditioner that can blow out even, soft mixing wind.

The utility model further object to provide a kind of air-supply efficiency high, and the indoor apparatus of air conditioner that noise is little.

Another further object of the utility model a kind of volume will be provided little and rakish indoor apparatus of air conditioner.

In order to realize at least one object above-mentioned, the utility model provides a kind of indoor apparatus of air conditioner, comprising:

Housing, it has the first air inlet being arranged on described housing upper and the air outlet being arranged at described lower housing portion; With

Centrifugal blower, is arranged on the top of described enclosure interior spatial accommodation, and is configured to suck surrounding air from described first air inlet surrounding environment and impel it to flow to described air outlet; Described centrifugal blower comprises spiral case and is arranged at the impeller in described spiral case, wherein

Described spiral case comprises the spiral case antetheca and spiral case perisporium that jointly limit spiral case air channel with the rear wall of described housing; Described spiral case antetheca offers the air inlet be communicated with described first air inlet, and described spiral case perisporium comprises the volute section relative to described impeller outer profile flaring, and spiral inlet area section and exit zone are stretched out respectively to downward in the two ends of described volute section; The wind outlet section of described centrifugal blower is formed between wherein said spiral inlet area section and described exit zone;

Described spiral inlet area section is configured as the snail tongue projection line being projected as circular arc making it in the plane perpendicular to described centrifugal blower rotation;

Described impeller is configured as the impeller projection line being projected as circle making its outline in described plane; And

Angle between the line in the center of circle of described snail tongue projection line and the center of circle of described impeller projection line and the horizontal line extended towards the direction close to described snail tongue projection line from the center of circle of described impeller projection line is 70 ° ~ 80 °.

Alternatively, described housing also has the second air inlet, and described air outlet and described second air inlet are separately positioned on the both sides, front and back of described lower housing portion;

Described indoor apparatus of air conditioner also comprises: drainage air ducting, is arranged at the bottom of described enclosure interior spatial accommodation, is configured to the air-flow from described centrifugal blower and the mixing of the air-flow from described second air inlet and sends from described air outlet; It the first air-ducting ring comprising wind path wall and be communicated with described air outlet, described wind path wall and described housing limit diversion air duct jointly, all flow to described air outlet via described first air-ducting ring to make the air-flow from described centrifugal blower; Wherein

Described wind path wall, described spiral case and described first air-ducting ring are one-body molded.

Alternatively, described first air-ducting ring is configured as the first air-ducting ring projection line being projected as annular making it in described plane, and described first air-ducting ring projection line comprises outer annular curve and the inner annular curve at described outer annular curvilinear inner; Wherein

Distance between the center of circle of the distance between the center of described inner annular curve and the center of circle of described snail tongue projection line and described impeller projection line and the center of circle of described snail tongue projection line is identical; And

The central angle of wherein said snail tongue projection line is 123 ° ~ 133 °.

Alternatively, between the center of described inner annular curve and the center of circle of described impeller projection line, distance is vertically 4.5:1 ~ 5:1 with ratio of distances constant in the horizontal direction.

Alternatively, the diameter of described impeller is 260mm ~ 270mm;

Between the center of described inner annular curve and the center of circle of described impeller projection line, distance is in the horizontal direction 54mm ~ 62mm; And

Between the center of described inner annular curve and the center of circle of described impeller projection line, distance is vertically 270mm ~ 280mm.

Alternatively, one first circle of reference of the described exit zone of vicinity partially-formed of described volute section for making its projection in described plane and radius increase successively, one second circle of reference, one the 3rd circle of reference are tangent; Described first circle of reference, described second circle of reference and described 3rd circle of reference are all tangent with described impeller projection line, wherein

The center of circle of described first circle of reference is positioned at the top of described horizontal reverse extending line; The center of circle of described second circle of reference is positioned at the below of described horizontal reverse extending line; The center of circle of described 3rd circle of reference is positioned at the below in the center of circle of described second circle of reference; And the center of circle of described first circle of reference, described second circle of reference and described 3rd circle of reference is all on one the 4th circle of reference; Wherein

Angle between the line in the center of circle of described first circle of reference and the center of circle of described impeller projection line and described horizontal reverse extending line is 3 ° ~ 7 °,

Angle between the line in the center of circle of described second circle of reference and the center of circle of described impeller projection line and described horizontal reverse extending line is 10 ° ~ 15 °,

Angle between the line in the center of circle of described 3rd circle of reference and the center of circle of described impeller projection line and described horizontal reverse extending line is 20 ° ~ 30 °,

Described 4th reference radius of a circle is 1:1 ~ 1.5:1 with the ratio of the radius of described impeller projection line;

Described second circle of reference is 1.12:1 ~ 1.16:1 with the ratio of described first reference radius of a circle; And

Described 3rd circle of reference is 1.07:1 ~ 1.11:1 with the ratio of described second reference radius of a circle.

Alternatively, the minimum clearance between described spiral inlet area section and described impeller outer profile is 9 ~ 14mm.

Alternatively, the second air-ducting ring that the rear side that described drainage air ducting is also included in described first air-ducting ring is arranged in order and the 3rd air-ducting ring, the front section of described second air-ducting ring is in the radially inner side of described first air-ducting ring back section, and the back section of described second air-ducting ring is in the radially inner side of described wind path wall; Described 3rd air-ducting ring is communicated with described second air inlet, and the front section of described 3rd air-ducting ring is in the radially inner side of described second air-ducting ring back section; And

Described wind path wall to comprise from described spiral case antetheca to the air channel antetheca of downward-extension with after described spiral inlet area section extends downward extreme lower position, extends upwardly to the air channel sidewall of described exit zone again, and the front edge of described air channel sidewall connects with described air channel antetheca; Wherein, described air channel antetheca is formed with opening, described first air-ducting ring extends to the minimum ring neck place of draught area from described opening tapers forward, then flaring extends forward.

Alternatively, described housing comprises:

Back cover, has the rear wall that bottom offers described second air inlet, and extends forward from described rear wall the container cavity wall limiting described enclosure interior spatial accommodation; With

Front panel, is installed on the forward direction opening part of described back cover, and its top offers described first air inlet, and bottom offers described air outlet.

Alternatively, described indoor apparatus of air conditioner, also comprises:

Shutter, its lower end is rotatably installed on the front side of described front panel around a transverse horizontal axis, to open or to close described first air inlet; With

Heat exchanger, is arranged on the air intake passage between described centrifugal blower and described first air inlet in described housing, to carry out heat exchange with the surrounding air entered via described first air inlet.

The utility model is by limiting the position relationship between snail tongue and impeller, thus optimize the air-out area of centrifugal blower, be conducive to flowing to air-conditioner air outlet with making air-flow steady and smooth at the pressure at centrifugal blower wind outlet section place to enable air-flow, avoid turbulence phenomenon as far as possible, thus improve the air output of indoor apparatus of air conditioner, optimize air-out effect.

Further, the utility model is by arranging drainage air ducting, by from centrifugal blower heat exchange air-flow and from the air-flow of the second air inlet be mixed to form mixing wind after send from air outlet again, thus increase the intake of this indoor apparatus of air conditioner, accelerate indoor speed air flow, the wind also making indoor apparatus of air conditioner blow out becomes more soft comfortable.

Further, the utility model passes through one-body molded to the first air-ducting ring, wind path wall and spiral case, make air-flow milder from the flow path volute outlet (i.e. fan outlet) to air-conditioner air outlet, more easily form Coanda effect, thus make the flowing of gas more smooth and easy, considerably increase the air output of this indoor apparatus of air conditioner.

Further, the utility model by limit spiral inlet area section in the center of circle of the plane inner projection perpendicular to centrifugal blower rotation and the first air-ducting ring the projection centre in the plane perpendicular to centrifugal blower rotation, the relative position of the projection centre of outline in the plane perpendicular to centrifugal blower rotation of centrifugal blower, thus avoid the secondary back of air-flow, the sidewall ring-type static pressure of volute of blower and the static pressure in exit are increased, reduce the dynamic pressure of air-flow at air outlet place, effectively optimize the air-flow at snail tongue and air outlet place, contribute to uniform stream and be transitioned into air outlet reposefully, improve fan efficiency, and noise can be made to reduce 1-1.5dB, eliminate abnormal sound.

Further, the utility model by limiting the minimum clearance between spiral inlet area section and impeller outer profile, thus avoids the secondary back of air-flow further, also eliminates the negative pressure near snail tongue simultaneously, contribute to air-flow and be transitioned into air outlet reposefully, and greatly can reduce noise.

Further, the utility model is limited by the outline line of the volute section to the contiguous exit zone of spiral case, make air-flow milder from volute outlet (the i.e. blower fan wind outlet section) flow path to air-conditioner air outlet, more easily form Coanda effect, thus make the flowing of gas more smooth and easy, considerably increase the air output of this indoor apparatus of air conditioner.Make the whole periphery of air-conditioner air outlet all have wind to blow over simultaneously, avoid the formation of condensation at air-conditioner air outlet place.

Accompanying drawing explanation

Hereinafter describe specific embodiments more of the present utility model with reference to the accompanying drawings by way of example, and not by way of limitation in detail.Reference numeral identical in accompanying drawing denotes same or similar parts or part.It should be appreciated by those skilled in the art that these accompanying drawings may not be drawn in proportion.In accompanying drawing:

Fig. 1 is the schematic diagram of the indoor apparatus of air conditioner of the utility model embodiment;

Fig. 2 is the schematic explosive view of indoor apparatus of air conditioner shown in Fig. 1;

Fig. 3 is the schematic cross sectional views of indoor apparatus of air conditioner shown in Fig. 1;

Fig. 4 is the schematic diagram of the utility model integrated spiral case of embodiment, wind path wall and first air-ducting ring;

Fig. 5 is the lateral side view of integrated spiral case shown in Fig. 4, wind path wall and the first air-ducting ring;

Fig. 6 is the rearview of integrated spiral case shown in Fig. 4, wind path wall and the first air-ducting ring;

Fig. 7 is the schematic perspective view of centrifugal blower, wind path wall and the first air-ducting ring.

Detailed description of the invention

Fig. 1 is the schematic diagram of the indoor apparatus of air conditioner 100 according to the utility model embodiment, and Fig. 2 is the explosive view of indoor apparatus of air conditioner 100 shown in Fig. 1, and Fig. 3 is the sectional view of indoor apparatus of air conditioner 100 shown in Fig. 1.See Fig. 1 to Fig. 3, the indoor apparatus of air conditioner 100 of the utility model embodiment comprises: housing 110 and the centrifugal blower 120 etc. being positioned at housing 110.

Particularly, housing 110 has the first air inlet 113 and air outlet 114.First air inlet 113 is arranged on housing 110 top, for introducing the air (such as room air) in environment space.Air outlet 114 is arranged on housing 110 bottom, for blowing to environment space.

Centrifugal blower 120 is arranged at the top of housing 110 interior accommodating space, and is configured to suck surrounding air from the first air inlet 113 surrounding environment and impel it to flow to air outlet 114.Centrifugal blower 120 comprises: spiral case 122 and the impeller 121 be arranged in spiral case 122.See Fig. 4 and Fig. 5, spiral case 122 comprises the spiral case antetheca 1221 and spiral case perisporium 1222 that jointly limit spiral case air channel with the rear wall of housing 110.Spiral case antetheca 1221 offers the air inlet 1223 be communicated with the first air inlet 113.Spiral case perisporium 1222 comprises the volute section 1225 relative to impeller 121 outline flaring, and spiral inlet area section 1226 and exit zone 1227 are stretched out respectively to downward in the two ends of volute section 1225; Wherein form the wind outlet section 1228 of centrifugal blower 120 between spiral inlet area section 1226 and exit zone 1227.

Present inventor finds through flow field analysis, and for spiral case 122, the molded line of the volute section 1225 of spiral case 122, spiral inlet area section 1226 are larger on the impact of centrifugal blower air output relative to the angle etc. of centrifugal blower 120.Because the molded line structure of the volute section 1225 of spiral case 122 is irregular, cannot directly limit, and the restriction relating to the geometrical relationship such as angle, distance is comparatively easy to describe in the planes, therefore is limited the structure of spiral case 122 by the mode of projection in the embodiment of the present application.

Spiral inlet area section 1226 is configured as the snail tongue projection line s being projected as circular arc making it in the plane perpendicular to centrifugal blower 120 rotation; Impeller 121 is configured as and makes its outline at the impeller projection line Ry that be projected as circle of forenamed vertical in the plane of the rotation of centrifugal blower 120; And between the line of the center of circle O5 of snail tongue projection line s and the center of circle B of impeller projection line Ry and the horizontal line a extended towards the direction close to snail tongue projection line s from the center of circle B of impeller projection line Ry, there is the first angle δ.Preferably, the value of the first angle δ is chosen between 70 ° ~ 80 °.

Present inventor is found further by flow field analysis, when the first angle δ is excessive, the air-out area of centrifugal blower 120 can reduce, then air-flow can sharply increase at the air pressure at wind outlet section 1228 place of centrifugal blower 120, thus cause the turbulent flow of gas, affect air-out effect.Otherwise when the first angle δ is too small, the air-out area of centrifugal blower 120 can increase, the air pressure of air-flow at wind outlet section 1228 place of centrifugal blower 120 so then can be caused to reduce, affect air output.Present inventor is found by flow field analysis and great many of experiments, and when the value of the first angle δ is within the scope of 70 ° ~ 80 °, air output and air-out effect are obviously optimized.Particularly, the value of the first angle δ is such as 70 °, 73 °, 75 °, 78 °, 80 °; In a further embodiment, the value of the first angle δ can within the scope of 73 ° ~ 78 °.Especially, when the first angle δ is 75 °, effect reaches optimum.

In certain embodiments, housing 110 also has the second air inlet 115, and air outlet 114 and the second air inlet 115 are separately positioned on the both sides, front and back of housing 110 bottom.Especially, the indoor apparatus of air conditioner 100 of the utility model embodiment also comprises drainage air ducting, it is arranged at the bottom of housing 110 interior accommodating space, and is configured to the air-flow from centrifugal blower 120 and the mixing of the air-flow from the second air inlet 115 and sends from air outlet 114.The first air-ducting ring 141 that drainage air ducting comprises wind path wall 143 and is communicated with air outlet 114, and wind path wall 143 and housing 110 limit diversion air duct 180 jointly, all flow to air outlet 114 via the first air-ducting ring 141 to make the air-flow from centrifugal blower 120.In the utility model preferred embodiment, wind path wall 143, spiral case 122 and the first air-ducting ring 141 are one-body molded.

Embodiment of the present utility model is passed through wind path wall 143, spiral case 122 and the one-body molded design of the first air-ducting ring 141, air-flow can be avoided to a certain extent after centrifugal blower 120 on the path flowing to air outlet 114, because transition line does not occur effect of boundary layer gently, thus can avoid to a certain extent gas turbulent flow and turbulent flow etc. phenomenon, flow to air outlet 114 with enabling gas steady and smooth, improve air-supply efficiency.

Fig. 6 is the rearview of integrated spiral case 122 shown in Fig. 4, wind path wall 143 and the first air-ducting ring 141.The schematic perspective view that Fig. 7 is centrifugal blower 120, wind path wall 143 and the first air-ducting ring 141 project from back to front in the plane perpendicular to centrifugal blower 120 rotation.See Fig. 6 and Fig. 7, in the perspective view shown in Fig. 7, first air-ducting ring 141 is configured as and makes it at the first air-ducting ring projection line that be projected as annular of forenamed vertical in the plane of the rotation of centrifugal blower 120, and the first air-ducting ring projection line comprises outer annular curve Q and the inner annular curve P in outside loop curve Q inside.Outer annular curve Q is the projection of outline in aforesaid plane of the first air-ducting ring 141, and inner annular curve P is the projection of Internal periphery in aforesaid plane of the first air-ducting ring 141.

In the embodiment of some, between the center A of inner annular curve P and the center of circle O5 of snail tongue projection line s, there is the first distance L1, between the center of circle B of impeller projection line Ry and the center of circle O5 of snail tongue projection line s, there is second distance L2, and the first distance L1 is equal with second distance L2.In a preferred embodiment, the central angle θ of snail tongue projection line s is 123 ° ~ 133 °.

By limit the center of circle of impeller 121, the center of circle of spiral inlet area section 1226 and the first air-ducting ring 141 air-out passage center between relative position relation, air-flow is made to flow in the process of air-out passage from centrifugal blower 120, the vortex near spiral inlet area section 1226 can be reduced, avoid the turbulent flow of gas, to realize seamlessly transitting of air-flow near spiral inlet area section 1226, reduce the pressure loss of air-flow in flow process, thus make the stream pressure before arrival air outlet easier in air outlet place formation Coanda effect, improve air-supply efficiency.

Particularly, the central angle θ of snail tongue projection line s can be 123 °, 125 °, 128 °, 130 °, 133 °; In a further embodiment, the central angle θ of snail tongue projection line s can within the scope of 125 ° ~ 130 °.Especially, when the central angle θ of snail tongue projection line s is 128 °, the pressure loss of air-flow in flow process can be reduced further, air output can be increased further, improve air-supply efficiency.

In certain embodiments, there is between the center A of inner annular curve P and the center of circle B of impeller projection line Ry the 3rd distance L3 in the horizontal direction and the 4th distance L4 vertically.Namely the center A of inner annular curve P and the projection of the rotation of centrifugal blower 120 in aforesaid plane are not on same vertical curve, and are not on same level line.It will be understood by those skilled in the art that the center A of inner annular curve P is the intersection point of the maximum line of 2 of the lateral separation of inner annular curve P and the vertical line apart from maximum two.Wherein the 4th distance L4 is 4.5:1 ~ 5:1 with the ratio of the 3rd distance L3.In the particular embodiment, the diameter of impeller 121 is 260mm ~ 270mm, and now, the 3rd distance L3 chooses within the scope of 54mm ~ 62mm, and the 4th distance L4 chooses within the scope of 270mm ~ 280mm.The center of circle of centrifugal blower 120 and the relative position at the first air-ducting ring 141 air-out passage center is limited according to aforementioned manner, more smooth and easy when can make the flow path of air-flow between spiral case 122 and air outlet 114 flows, make the pressure of air-flow before arriving air outlet 114 reach the size being conducive to forming Coanda effect, for the formation of air outlet 114 place Coanda effect provides advantage simultaneously.

In a further embodiment, the 4th distance L4 can be 4.5:1,4.7:1,5:1 with the ratio of the 3rd distance L3.The diameter of impeller 121 outline can be 260mm, 263mm, 265mm, 268mm, 270mm; Now, the 3rd distance L3 can be 54mm, 56mm, 58mm, 60mm, 62mm, and the 4th distance L4 can be 270mm, 273mm, 275mm, 278mm, 280mm.The flowing of gas can being optimized so further, advantageously in forming Coanda effect at air outlet 114 place, thus greatly improving the air-supply efficiency of indoor apparatus of air conditioner 100.In a preferred embodiment, the diameter of impeller 121 outline is within the scope of 263mm ~ 268mm, and the 3rd distance L3 is within the scope of 56mm ~ 60mm, and the 4th distance L4 is within the scope of 273mm ~ 278mm.Especially, when the diameter of impeller 121 outline is 265mm, the 3rd distance L3 is 58mm, and when the 4th distance L4 is 275mm, effect is optimum.

In certain embodiments, one first circle of reference R1, the one second circle of reference R2 of contiguous air outlet section 1227 partially-formed of volute section 1225 for making its projection t in aforesaid plane and radius increase successively, one the 3rd circle of reference R3 are tangent.And the first circle of reference R1, the second circle of reference R2 and the 3rd circle of reference R3 are all tangent with impeller projection line Ry.

The center of circle O1 of the first circle of reference R1 is positioned at the top of the reverse extending line of horizontal line a; The center of circle O2 of the second circle of reference R2 is positioned at the below of the reverse extending line of horizontal line a; Under the center of circle O3 of the 3rd circle of reference R3 is positioned at the center of circle O2 of the second circle of reference R2; And the center of circle of the first circle of reference R1, the second circle of reference R2 and the 3rd circle of reference R3 is all on one the 4th circle of reference R4.

In certain embodiments, between the line of the center of circle O1 of the first circle of reference R1 and the center of circle B of impeller projection line Ry and the reverse extending line of horizontal line a, there is the second angle α; Between the line of the center of circle O2 of the second circle of reference R2 and the center of circle B of impeller projection line Ry and the reverse extending line of horizontal line a, there is the 3rd angle β; Between the line of the center of circle O3 of the 3rd circle of reference R3 and the center of circle B of impeller projection line Ry and the reverse extending line of horizontal line a, there is the 4th angle γ; And the second angle α is 3 ° ~ 7 °, the 3rd angle β is 10 ° ~ 15 °, and the 4th angle γ is 20 ° ~ 30 °.

In a preferred embodiment, the radius (distance namely in Fig. 7 between O1 and O4) of the 4th circle of reference R4 is 1:1 ~ 1.5:1 with the ratio of the radius of impeller projection line Ry.The radius of the second circle of reference R2 and the first circle of reference R1 is 1.12:1 ~ 1.16:1, and the 3rd circle of reference R3 is 1.07:1 ~ 1.11:1 with the ratio of the radius of the second circle of reference R2.Present inventor finds through experiment, by the spiral case inlet pressure designed like this, air-flow can be made in the flowing steady and smooth more of blower fan wind outlet section, thus reduces the pressure loss of air-flow in flow process, improves air-supply efficiency.

Particularly, the radius of the 4th circle of reference R4 can be 1:1,1.2:1,1.5:1 with the ratio of the radius of impeller projection line Ry.Second circle of reference R2 can be 1.12:1,1.14:1,1.16:1 with the ratio of the radius of the first circle of reference R1.3rd circle of reference R3 can be 1.07:1,1.08:1,1.1:1,1.11:1 with the ratio of the radius of the second circle of reference R2.Second angle α is 3 °, 5 °, 7 °; 3rd angle β is 10 °, 12 °, 15 °; 4th angle γ is 20 °, 22 °, 24 °, 26 °, 28 °, 30 °.

In a further preferred embodiment, the second angle α is about 5 degree; 3rd angle β is about 12 degree; 4th angle γ is about 26 degree, and the radius of the 4th circle of reference R4 is about 1.22:1 with the ratio of the radius of impeller projection line Ry.Like this, the pressure loss of air-flow in flow process can be reduced further, greatly can increase air output, improve air-supply efficiency.Particularly, when the diameter of impeller projection line Ry is about 265mm, the radius of the first circle of reference R1 is about 48mm.

Embodiment of the present utility model, by the aforementioned design to spiral case inlet pressure, in conjunction with the design of the position relationship of centrifugal blower 120 and the first air-ducting ring 141, spiral inlet area section 1226, can ensure the smoothness of air-flow in indoor apparatus of air conditioner 100 internal flow further.Air-flow, from after the first air inlet 113 enters indoor apparatus of air conditioner 100, can flow along spiral case perisporium 1222 under the dynamic action of impeller 121.Distance between the rotation ensureing centrifugal blower 120 and the first air-ducting ring 141 center line is chosen by aforementioned dimensions, air-flow flows out rear circulation area from impeller 121 can become large, flowing velocity can decrease, and now a part of kinetic energy of air-flow can change into interior energy.In the process flowed along spiral case perisporium 1222, the static pressure of air-flow becomes increase trend, when arrival the first air-ducting ring 141, static pressure reaches maximum, at this moment because air-flow is constantly assembled by spiral case perisporium 1222, make air-flow form Coanda effect when flowing from the first air-ducting ring 141 to air outlet 114, namely air-flow along the annular surface 1413 of the first air-ducting ring 141 inwall outwardly.Now, the whole edge of air outlet 114 all can have air-flow to flow through, and the steam avoided in air is caught a cold at air outlet 114 edge and forms the appearance of dew condensation phenomenon.

In addition, in certain embodiments, the center A of the inner annular curve P of the first air-ducting ring projection line and the projection line of spiral inlet area section 1226 in aforesaid plane lay respectively at the both sides of the vertical curve of the center of circle B through impeller projection line Ry, and the minimum clearance between guarantee spiral inlet area section 1226 and impeller 121 outline is in aforesaid span, like this, the airflow pressure losses from centrifugal blower 120 can be reduced further, avoid secondary back, increase air output, thus improve air-supply efficiency.

In addition, present inventor is by further the analysiss discovery in flow field, and minimum clearance between spiral inlet area section 1226 and impeller 121 outline (distances between two sites nearest in each site of namely spiral inlet area section 1226 inner surface and in each site of impeller 121 outline) has a significant impact the size etc. that the flowing of gas and gas produce noise in flow process.When minimum clearance is too small, gas can be squeezed in flow process, thus makes the air-flow at spiral inlet area section 1226 place obviously accelerate break-in, causes secondary back, and noise also increases thereupon simultaneously.In addition, minimum clearance is too small also can be caused when impeller 121 runs up, and section 1226 pairs of impellers 121 in spiral inlet area produce interferes.When minimum clearance is excessive, then be similar to the design of shallow tongue, flow angle is bigger than normal, gas is by the outside deflection of the hand of spiral along spiral case 122, make to occur negative pressure in the spiral inlet area section 1226 of spiral case 122 with the intersection of wind outlet section 1228, thus the vortex near aggravation spiral inlet area section 1226, cause gas movement disorder, impact air-supply effect.

Present inventor finds through great many of experiments, when minimum clearance between spiral inlet area section 1226 and impeller 121 outline is within the scope of 9 ~ 14mm, not only backflow phenomenon can be avoided, also can eliminate the negative pressure near spiral inlet area section 1226 simultaneously, substantially reduce noise, also improve air-supply efficiency.Therefore, in the utility model preferred embodiment, the minimum clearance between spiral inlet area section 1226 and impeller 121 outline is 9 ~ 14mm.Particularly, the minimum clearance between spiral inlet area section 1226 and impeller 121 outline can be 9mm, 10mm, 12mm, 14mm.In a further preferred embodiment, the minimum clearance between spiral inlet area section 1226 and impeller 121 outline is within the scope of 10mm ~ 12mm, and especially, when the minimum clearance between spiral inlet area section 1226 and impeller 121 outline is 10mm, effect is optimum.

In certain embodiments, indoor apparatus of air conditioner 100 also comprises heat exchanger 130, it is arranged on the air intake passage between centrifugal blower 120 and the first air inlet 113 in housing 110, to carry out heat exchange with the surrounding air entered via the first air inlet 113 forming heat exchange air-flow.At least part of heat exchange section of heat exchanger 130 is tabular, at least part of heat exchange section perpendicular to the rotation of centrifugal blower 120, and between centrifugal blower 120 and the first air inlet 113.Particularly, heat exchanger 130 is a plate type heat exchanger.In other embodiments, heat exchanger 130 comprises multiple plate type heat exchanger, and multiple plate type heat exchanger sets gradually along the direction perpendicular to the rotation of centrifugal blower 130, and multiple plate type heat exchanger is parallel with one another.

In certain embodiments, wind path wall 143 comprises the air channel antetheca 1431 from spiral case antetheca 1221 to downward-extension, with extend downward extreme lower position from spiral inlet area section 1226 after extend upwardly to the air channel sidewall 1432 of exit zone 1227 again, and the front edge of air channel sidewall 1432 connects with air channel antetheca 1431.Wherein, air channel antetheca 1431 is formed with opening, and the first air-ducting ring 141 extends to the minimum ring neck place of draught area from aforementioned opening tapers forward, then flaring extends forward.

In certain embodiments, the second air-ducting ring 142 that the rear side that drainage air ducting is also included in the first air-ducting ring 141 is arranged in order and the 3rd air-ducting ring 144.The front section of the second air-ducting ring 142 is in the radially inner side of the first air-ducting ring 141 back section, the back section of the second air-ducting ring 142 is in the radially inner side of wind path wall 143,3rd air-ducting ring 144 is communicated with the second air inlet 115, and the front section of the 3rd air-ducting ring 144 is in the radially inner side of the second air-ducting ring 142 back section.

The central collar aperture of three air-ducting ring is interconnected, and defines the through air channel 170 of connection second air inlet 115 and air outlet 114; The heat exchange wind air channel 190 being communicated with spiral case air channel and through air channel 170 is formed between adjacent two air-ducting ring.Air-flow from centrifugal blower 120 all enters through air channel 170 from heat exchange wind air channel 190 behind spiral case air channel.

In a further embodiment, the first air-ducting ring 141, second air-ducting ring 142 and the 3rd air-ducting ring 144 all have front and back opening and middle through tubular structure.Each air-ducting ring all has himself import and outlet, and the after-opening of each air-ducting ring is its import, open front is its outlet.Three air-ducting ring are arranged in order along the longitudinal direction, the outlet of the 3rd air-ducting ring 144 is stretched in the second air-ducting ring 142 import, the outlet of the second air-ducting ring 142 is stretched in the first air-ducting ring 141 import, in the utility model embodiment, the air-flow part that centrifugal blower 120 blows downwards enters the first air-ducting ring 141 via the outside of the second air-ducting ring 142, and another part enters the first air-ducting ring 141 via the inner side of the second air-ducting ring 142.Thus, enough large negative pressure is formed at the radially inner side of the 3rd air-ducting ring 144 and the second air-ducting ring 142 back section, enter three air-ducting ring 144 in via the second air inlet 115 to make the air in the second air inlet 115 surrounding ambient under this negative pressure, then mix with the air-flow after heat exchange, together flow out from air outlet 114, thus increase the overall intake of indoor apparatus of air conditioner 100, accelerate the flowing velocity of room air.Simultaneously without the surrounding air (referred to as non-heat exchange wind) of heat exchange and wind (referred to as heat exchange wind) the mixed mixing wind after heat exchange comparatively soft, blowing to user can make it feel extraordinarily comfortable with it, and the comfortableness substantially increasing user is experienced.

In certain embodiments, 3rd air-ducting ring 144 has the front-end edge limiting formation export and import respectively and the end edge of substantially oblong-shaped shape, and connected by an annular surface between front-end edge, end edge, this annular surface extends to front-end edge from end edge convergent.3rd air-ducting ring 144 can be one-body molded with the rear wall of housing 110, and the second air inlet 115 is the import of the 3rd air-ducting ring 144.Second air-ducting ring 142 and the first air-ducting ring 141 all can comprise the front-end edge limiting formation export and import respectively and end edge with substantially oblong-shaped shape, and are connected by an annular surface between front-end edge, end edge.The annular surface of the second air-ducting ring 142 and the first air-ducting ring 141 extends to the minimum ring neck of draught area from the first convergent of respective end edge, then flaring extends to respective front-end edge.Wherein, the front-end edge of the second air-ducting ring 142 can be connected by round-corner transition with between annular surface.Annular surface everywhere thickness can be identical.The draught area of front-end edge is less than the draught area of ora terminalis thereafter, and front-end edge is than the ring neck of end edge closer to annular surface.For the first air-ducting ring 141, the draught area of its front-end edge 1411 is substantially identical with the draught area of end edge 1412, and end edge 1412 is than the ring neck of front-end edge 1411 closer to annular surface 1413.In certain embodiments, the front-end edge 1411 of the first air-ducting ring 141 limits the outlet formed and can stretch in air outlet 114, and basic concordant with the periphery of air outlet 114.

In some embodiments of the utility model, the second air-ducting ring 142 can be configured to swing up and down.When the second air-ducting ring 142 swings, can there is downward shift in its outlet (i.e. open front), thus the air-out direction generation downward shift of bootable air outlet 114.

The indoor apparatus of air conditioner 100 of the utility model embodiment also comprises driving mechanism, is arranged in housing 110, and is configured to driving second air-ducting ring 142 and swings up and down.Driving mechanism is connected with the second air-ducting ring 142, by drive the second air-ducting ring 142 swing up and down to change opening before and after it towards.Thus directly regulate the air supply direction of mixing wind at air outlet 114 place, increase the blowing range of indoor apparatus of air conditioner 100.

In certain embodiments, housing 110 comprises back cover 111 and front panel 112.Wherein, back cover 111 has the rear wall 1111 that bottom offers the second air inlet 115, and extends forward from rear wall 1111 the container cavity wall 1112 limiting enclosure interior spatial accommodation.Front panel 112 is installed on the forward direction opening part of back cover 111, and its top offers the first air inlet 113, and bottom offers air outlet 114.

In certain embodiments, indoor apparatus of air conditioner 100 also comprises shutter 150, and its lower end is rotatably installed on the front side of front panel 112 around a transverse horizontal axis, to open or close the first air inlet 113.In a preferred embodiment, the open angle of shutter 150 can freely control, thus effectively can control the intake of the first air inlet 113, to reach the object of the air output regulating indoor apparatus of air conditioner 100.

In certain embodiments, indoor apparatus of air conditioner 100 also comprises drip tray supporting seat 160, and it is arranged at the bottom of spiral case antetheca 1221 and is positioned on the upside of the first air-ducting ring 141, for fixedly mounting drip tray.

So far, those skilled in the art will recognize that, although multiple exemplary embodiment of the present utility model is illustrate and described herein detailed, but, when not departing from the utility model spirit and scope, still can directly determine or derive other modification many or amendment of meeting the utility model principle according to content disclosed in the utility model.Therefore, scope of the present utility model should be understood and regard as and cover all these other modification or amendments.

Claims (10)

1. an indoor apparatus of air conditioner, is characterized in that, comprising:

Housing, it has the first air inlet being arranged on described housing upper and the air outlet being arranged at described lower housing portion; With

Centrifugal blower, is arranged on the top of described enclosure interior spatial accommodation, and is configured to suck surrounding air from described first air inlet surrounding environment and impel it to flow to described air outlet; Described centrifugal blower comprises spiral case and is arranged at the impeller in described spiral case, wherein

Described spiral case comprises the spiral case antetheca and spiral case perisporium that jointly limit spiral case air channel with the rear wall of described housing; Described spiral case antetheca offers the air inlet be communicated with described first air inlet, and described spiral case perisporium comprises the volute section relative to described impeller outer profile flaring, and spiral inlet area section and exit zone are stretched out respectively to downward in the two ends of described volute section; The wind outlet section of described centrifugal blower is formed between wherein said spiral inlet area section and described exit zone;

Described spiral inlet area section is configured as the snail tongue projection line being projected as circular arc making it in the plane perpendicular to described centrifugal blower rotation;

Described impeller is configured as the impeller projection line being projected as circle making its outline in described plane; And

Angle between the line in the center of circle of described snail tongue projection line and the center of circle of described impeller projection line and the horizontal line extended towards the direction close to described snail tongue projection line from the center of circle of described impeller projection line is 70 ° ~ 80 °.

2. indoor apparatus of air conditioner according to claim 1, is characterized in that,

Described housing also has the second air inlet, and described air outlet and described second air inlet are separately positioned on the both sides, front and back of described lower housing portion;

Described indoor apparatus of air conditioner also comprises: drainage air ducting, is arranged at the bottom of described enclosure interior spatial accommodation, is configured to the air-flow from described centrifugal blower and the mixing of the air-flow from described second air inlet and sends from described air outlet; It the first air-ducting ring comprising wind path wall and be communicated with described air outlet, described wind path wall and described housing limit diversion air duct jointly, all flow to described air outlet via described first air-ducting ring to make the air-flow from described centrifugal blower; Wherein

Described wind path wall, described spiral case and described first air-ducting ring are one-body molded.

3. indoor apparatus of air conditioner according to claim 2, is characterized in that,

Described first air-ducting ring is configured as the first air-ducting ring projection line being projected as annular making it in described plane, and described first air-ducting ring projection line comprises outer annular curve and the inner annular curve at described outer annular curvilinear inner; Wherein

Distance between the center of circle of the distance between the center of described inner annular curve and the center of circle of described snail tongue projection line and described impeller projection line and the center of circle of described snail tongue projection line is identical; And

The central angle of wherein said snail tongue projection line is 123 ° ~ 133 °.

4. indoor apparatus of air conditioner according to claim 3, is characterized in that,

Between the center of described inner annular curve and the center of circle of described impeller projection line, distance is vertically 4.5:1 ~ 5:1 with ratio of distances constant in the horizontal direction.

5. indoor apparatus of air conditioner according to claim 4, is characterized in that,

The diameter of described impeller is 260mm ~ 270mm;

Between the center of described inner annular curve and the center of circle of described impeller projection line, distance is in the horizontal direction 54mm ~ 62mm; And

Between the center of described inner annular curve and the center of circle of described impeller projection line, distance is vertically 270mm ~ 280mm.

6. indoor apparatus of air conditioner according to claim 1, is characterized in that,

The described exit zone of vicinity of described volute section partially-formed one first circle of reference for making its projection in described plane and radius increase successively, one second circle of reference, one the 3rd circle of reference are tangent; Described first circle of reference, described second circle of reference and described 3rd circle of reference are all tangent with described impeller projection line, wherein

The center of circle of described first circle of reference is positioned at the top of described horizontal reverse extending line; The center of circle of described second circle of reference is positioned at the below of described horizontal reverse extending line; The center of circle of described 3rd circle of reference is positioned at the below in the center of circle of described second circle of reference; And the center of circle of described first circle of reference, described second circle of reference and described 3rd circle of reference is all on one the 4th circle of reference; Wherein

Angle between the line in the center of circle of described first circle of reference and the center of circle of described impeller projection line and described horizontal reverse extending line is 3 ° ~ 7 °,

Angle between the line in the center of circle of described second circle of reference and the center of circle of described impeller projection line and described horizontal reverse extending line is 10 ° ~ 15 °,

Angle between the line in the center of circle of described 3rd circle of reference and the center of circle of described impeller projection line and described horizontal reverse extending line is 20 ° ~ 30 °,

Described 4th reference radius of a circle is 1:1 ~ 1.5:1 with the ratio of the radius of described impeller projection line;

Described second circle of reference is 1.12:1 ~ 1.16:1 with the ratio of described first reference radius of a circle; And

Described 3rd circle of reference is 1.07:1 ~ 1.11:1 with the ratio of described second reference radius of a circle.

7. indoor apparatus of air conditioner according to claim 1, is characterized in that,

Minimum clearance between described spiral inlet area section and described impeller outer profile is 9 ~ 14mm.

8., according to the indoor apparatus of air conditioner described in claim 2, it is characterized in that,

The second air-ducting ring that the rear side that described drainage air ducting is also included in described first air-ducting ring is arranged in order and the 3rd air-ducting ring, the front section of described second air-ducting ring is in the radially inner side of described first air-ducting ring back section, and the back section of described second air-ducting ring is in the radially inner side of described wind path wall; Described 3rd air-ducting ring is communicated with described second air inlet, and the front section of described 3rd air-ducting ring is in the radially inner side of described second air-ducting ring back section; And

Described wind path wall to comprise from described spiral case antetheca to the air channel antetheca of downward-extension with after described spiral inlet area section extends downward extreme lower position, extends upwardly to the air channel sidewall of described exit zone again, and the front edge of described air channel sidewall connects with described air channel antetheca; Wherein, described air channel antetheca is formed with opening, described first air-ducting ring extends to the minimum ring neck place of draught area from described opening tapers forward, then flaring extends forward.

9. according to the indoor apparatus of air conditioner described in claim 2, it is characterized in that, described housing comprises:

Back cover, has the rear wall that bottom offers described second air inlet, and extends forward from described rear wall the container cavity wall limiting described enclosure interior spatial accommodation; With

Front panel, is installed on the forward direction opening part of described back cover, and its top offers described first air inlet, and bottom offers described air outlet.

10. indoor apparatus of air conditioner according to claim 9, is characterized in that, also comprises:

Shutter, its lower end is rotatably installed on the front side of described front panel around a transverse horizontal axis, to open or to close described first air inlet; With

Heat exchanger, is arranged on the air intake passage between described centrifugal blower and described first air inlet in described housing, to carry out heat exchange with the surrounding air entered via described first air inlet.