CN110017647A - Supply air system and refrigerator with it - Google Patents

Abstract

The present invention provides a kind of supply air systems for refrigerator, comprising: air duct cover board defines air-supply space with refrigerator compartment liner jointly, and the space that is configured to will to blow is isolated with an indoor storage space；Centrifugal wind wheel is set in air-supply space, and is configured to suck air from its axial sides and be blown out to side；Multiple return air inlets are offered on air duct cover board, wherein to allow the air in storage space to enter air-supply space；Centrifugal wind wheel is configured between air duct cover board and liner suck the air entered in air-supply space via return air inlet from the front side towards air duct cover board of centrifugal wind wheel and the rear side away from air duct cover board simultaneously there are being set to gap in air-supply space.Air-supply assembly of the invention has the novel return air path of bilateral return air, extends the return air path of at least partly air, so that return air stream is gentle, reduces return air noise.

Description

Supply air system and refrigerator with it

Technical field

The present invention relates to refrigerating technical fields, send more particularly to a kind of supply air system for refrigerator and with this The refrigerator of wind system.

Background technique

It is typically provided on rear side of existing dual system cold compartment of refrigerator for providing the air duct of cooling capacity to refrigerating chamber, is set to Blower in air duct can cause return air noise larger, shadow when actually carrying out refrigeration wind circulation because of the windage effect of air duct cover board Ring the use feeling of user.

Summary of the invention

It is an object of the present invention to provide a kind of supply air system for refrigerator with novel return air path.

Another further object of the present invention is to the return air noises of refrigerator compartment to be reduced.

Particularly, the present invention provides a kind of supply air systems for refrigerator, comprising:

Air duct cover board defines air-supply space with the liner of the refrigerator jointly, and be configured to the air-supply space and The indoor storage space isolation between the refrigerator；

Centrifugal wind wheel is set in the air-supply space, and is configured to from its axial sides sucking air and side-blown to week Out；Wherein

Multiple return air inlets are offered on the air duct cover board, to allow the air in the storage space to enter the air-supply Space；And

The centrifugal wind wheel is configured between the air duct cover board and the liner described there are being set to gap It blows in space, by the air entered in the air-supply space via the return air inlet simultaneously from the direction of the centrifugal wind wheel The front side of the air duct cover board and away from the air duct cover board rear side suck.

Further, the supply air system further include:

Volute of blower is set on the inside of the air duct cover board；And

Blower rear cover is configured to cover the front and rear sides for being buckled in the centrifugal wind wheel respectively with the volute of blower；Wherein

It is covered after the blower and offers rear air entry, to allow the centrifugal wind wheel will be described via the rear air entry The air sucking blown in space；

Preceding air entry is offered on the volute of blower, to allow the centrifugal wind wheel will be described via the preceding air entry The air sucking blown in space.

Further, the air-supply assembly is configured to the lower rearward side positioned at the compartment, and it is logical that top is provided with air-flow Road；

Evaporator is provided in the airflow channel, the airflow channel has to be sent for what is blown to the storage space Air port；And

The centrifugal wind wheel is configured to that air-flow acceleration is promoted to flow up into the airflow channel and by the evaporation Device flows to the air outlet.

Further, the liner be configured to the corresponding region of the centrifugal wind wheel it is outside away from the air duct cover board Protrusion, to increase the air-supply space for the rear air draught side for being located at the centrifugal wind wheel.

Further, the part liner below the evaporator, which is configured to bend towards the air duct cover board, to be prolonged It stretches to form water receiving bottom, and the projection of the evaporator in the vertical direction is made to each fall within the water receiving bottom.

Further, the part liner below the evaporator and above the water receiving bottom is configured to deviate from The air duct cover board protrusion is arranged to form water receiving side；

The water receiving bottom is configured to be higher than the side of the close water receiving side close to the side of the air duct cover board, with Flow the water droplet fallen on towards the water receiving side；And

The intersection of the water receiving side and the water receiving bottom, which is configured to have, is lower than intermediate position far from described The tilt angle in middle position, and the middle position offers discharge outlet, flows to the liquid of the intersection certainly with guidance The discharge outlet outflow.

Further, the evaporator has multiple fins, and a base angle of the fin is configured to bias portion, To change the dripping position of the water droplet fallen from the fin.

Further, two groups of return air groups are provided on the air duct cover board, each return air group includes that multiple longitudinal directions are prolonged The return air inlet stretched；

The return air group is respectively to be located at left return air group and the right side in the region of lateral left and right ends of the air duct cover board Return air group, and projection of the two groups of return air groups on the air duct cover board is located at the preceding air entry and rear air entry described The outside of projection on air duct cover board.

Further, the supply air system further include:

Multiple masking caps are configured to be set to multiple return air inlets of the return air group in the storage space side respectively Left or right side, to cover the return air inlet from side；Wherein

The multiple masking caps in part are set on the right side of the multiple return air inlet in the left return air group, and are had towards a left side Opening so that the air in storage room flows on the inside of the masking cap from left to right and enters in the left return air group The return air inlet；

The multiple masking caps of another part are set on the left of the multiple return air inlet in the right return air group, and are had Towards right opening, so that the air right-to-left in storage room flows on the inside of the masking cap and enters the right return air group The interior return air inlet.

The present invention also provides a kind of refrigerators, with the cabinet including at least one compartment and according to any of the above-described institute The supply air system stated, wherein

At least one described compartment is refrigerator room, and the supply air system is set in the refrigerator room.

Air-supply assembly of the invention has the novel return air path of bilateral return air, and partial air is around centrifugal wind wheel from thereafter Side is inhaled into, which has longer flow path, is avoided big in the storage space side air short time of refrigerator compartment Amount, which flows into air-supply space, keeps storage space side compartment negative pressure too low.

Further, air-supply assembly of the invention extends the return air path of at least partly air, avoids just via return air Mouth enters the large quantity of air sudden change flow direction in air-supply space, so that return air stream is gently to reduce return air noise.

According to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be brighter The above and other objects, advantages and features of the present invention.

Detailed description of the invention

Some specific embodiments of the present invention is described in detail by way of example and not limitation with reference to the accompanying drawings hereinafter. Identical appended drawing reference denotes same or similar part or part in attached drawing.It should be appreciated by those skilled in the art that these What attached drawing was not necessarily drawn to scale.In attached drawing:

Fig. 1 is the schematic elevational view of air-supply assembly in supply air system according to an embodiment of the invention；

Fig. 2 is the schematic cross sectional views of the cutting line A-A interception in Fig. 1, wherein the dotted line with arrow shows sky The flow direction of gas；

Fig. 3 is the schematic, exploded of air-supply assembly according to an embodiment of the invention；

Fig. 4 is the schematic, exploded that air-supply assembly according to an embodiment of the invention is observed from another angle；

Fig. 5 is the schematic elevational view of blower rear cover according to an embodiment of the invention；

Fig. 6 is the schematic side elevational cross-sectional view of the compartment according to an embodiment of the invention with supply air system；

Fig. 7 is the schematic elevational view of part liner according to an embodiment of the invention；

Fig. 8 is the schematic elevational view of evaporator in supply air system according to an embodiment of the invention；

Fig. 9 is the schematic cross sectional views of the cutting line C-C interception in Fig. 8；

Figure 10 is the schematic development views of fin according to an embodiment of the invention.

Specific embodiment

Fig. 1 is the schematic elevational view of air-supply assembly in supply air system according to an embodiment of the invention.Fig. 2 is along figure The schematic cross sectional views of cutting line A-A interception in 1.

Refrigerator may generally be of the liner as the cabinet shell of its outer surface and inside cabinet shell.Liner can limit Compartment is made, and indoor at least partly space can be storage space.Compartment can be multiple, and can be set as needed For refrigerating chamber, freezing chamber or alternating temperature compartment etc..Further, generally it is arranged in some air-cooled or dual system refrigerator refrigerating chamber There is airflow channel, provides refrigeration wind with the storage space for refrigerating chamber.It is fast to be formed to may be provided with air-supply assembly in airflow channel The air or airflow channel of speed flowing can collectively form with air-supply assembly and provide the supply air system of cooling wind for refrigerating chamber. Air-supply assembly may be disposed at the most upstream of supply air system.It should be understood that most upstream refers to the source in air-supply path herein, not It is the actual installation position of air-supply assembly.

Supply air system for refrigerator may include air-supply assembly, and air-supply assembly may include air duct cover board 200 and centrifugal wind wheel 400.Air duct cover board 200 can substantially be arranged in parallel with the liner of refrigerator compartment 100, to limit jointly with refrigerator compartment liner 100 There is air-supply space 20, and is configured to for being isolated with the storage space 10 in compartment 1 in air-supply space 20.Centrifugal wind wheel 400 is settable In air-supply space 20 in, and be configured to from axial sides suck air and to side blow out.Further, on air duct cover board 200 Multiple return air inlets 201 can be offered, to allow the air in storage space 10 to enter air-supply space 20.Particularly, centrifugal wind wheel 400 be configured between air duct cover board 200 and liner 100 there are be set to gap air-supply space 20 in, will via return Air port 201 enters the air in air-supply space 20 simultaneously from centrifugal wind wheel 400 towards the front side of air duct cover board 200 and away from wind The rear side of road cover board 200 sucks.

Specifically, air duct cover board 200 may be disposed at 100 front of liner of 1 rear side of refrigerator compartment, in 1 rear side shape of compartment At air-supply space 20.The return air inlet 201 opened up on air duct cover board 200 allows air in storage space 10 to flow into air-supply from front to back Space 20.The centrifugal wind wheel 400 for being configured to front side and rear side while air-breathing as a result, promotes the partial air for entering air-supply space 20 Continue flowing backward and is located substantially at being positioned against 400 center flow of centrifugal wind wheel and being inhaled into for 400 rear of centrifugal wind wheel Wherein, and another part air can be then inhaled into wherein on front side of centrifugal blower.

Air-supply assembly of the invention has the novel return air path of bilateral return air, and partial air bypasses centrifugal wind wheel 400 certainly Rear side is inhaled into, which has longer flow path, avoids the 10 side air of storage space of refrigerator compartment in short-term Interior a large amount of inflow air-supplies space 20 keeps 10 side compartment negative pressure of storage space too low, so that user opens refrigerator doors.

Further, air-supply assembly of the invention extends the return air path of at least partly air, avoids just via return air Mouth 201 enters the large quantity of air sudden change flow direction in air-supply space 20, so that return air stream is more gently to reduce return air Noise.

Fig. 3 is the schematic, exploded of air-supply assembly according to an embodiment of the invention.Fig. 4 is one according to the present invention The schematic, exploded that the air-supply assembly of embodiment is observed from another angle.

In some embodiments of the invention, air-supply assembly further includes volute of blower and blower rear cover 300.Volute of blower is set It is placed in 200 inside of air duct cover board.Blower rear cover 300 can be configured to cover the front and back for being buckled in centrifugal wind wheel 400 respectively with volute of blower Two sides, to collectively constitute centrifugal blower and be fixedly installed on liner 100.Further, after being offered on blower rear cover 300 Air entry 302, with allow centrifugal wind wheel 400 via rear air entry 302 will blow space 20 in air suck.Correspondingly, wind Air entry 204a before being offered on machine spiral case, to allow centrifugal wind wheel 400 that will blow in space 20 via preceding air entry 204a Air sucking.

Fig. 5 is the schematic elevational view of blower rear cover 300 according to an embodiment of the invention.

Further, the inside of blower rear cover 300 can have the double-deck raised line 301 with volute of blower profiling, and be configured to When blower rear cover 300 is installed on air duct cover board 200, make the double-deck convex towards the insertion of the end of blower rear cover 300 of volute of blower Gap between item 301.As a result, convenient for the installation positioning of volute of blower and blower rear cover 300, and enhance the jail of the two connection Soundness.

Fig. 6 is the schematic side elevational cross-sectional view of the compartment 1 according to an embodiment of the invention with supply air system.

In some embodiments of the invention, air-supply assembly is configured to be located at 1 lower rearward side of compartment, and top is provided with gas Circulation road 22.It may be provided with evaporator 500 in airflow channel 22, (in the present embodiment, that is to say positioned at airflow channel downstream 22 upper area) air outlet for blowing to storage space 10 can be offered.Correspondingly, centrifugal wind wheel 400 can be configured to To up-draught, to promote air-flow acceleration to flow up into airflow channel 22 and flow to air outlet by evaporator 500.Namely It is that, in vertical direction, air-supply assembly can be located in compartment 1 below the lowest level of rack, to save the top of storage space 10 Space increases the dischargeable capacity of compartment 1.

Further, in some embodiments of the invention, air duct cover board 200 may include main part and guide part, blower Spiral case may be disposed on the inside of main part.Specifically, air duct cover board 200 can be made of upper and lower two parts, and guide part is located at main part Top.Main part can be configured to be arranged relative to airflow channel 22 far from liner 100, to increase before centrifugal wind wheel 400 The air-supply space 20 of side.

Further, liner 100 is configured to away from 200 convex of air duct cover board with the corresponding region of centrifugal wind wheel 400 Out, to increase the air-supply space 20 for being located at 400 rear side of centrifugal wind wheel.Specifically, the degree of the outside protrusion of liner 100 can be greater than The degree of main part Forward " occupancy " storage space 10, to guarantee the volume of storage space 10.It should be understood that " accounting for herein With " refer to main part relative to guide part closer to cabinet front.Due to being refrigerator foaming layer on rear side of liner 100, liner 100 Front-rear position can't generate the foaming effect of foaming layer and significantly affect.It that is to say, air-supply space 10 can more " occupy " Foaming layer side space makes main part without excessively forward setting, and meets return air demand by the centrifugal blower of bilateral air draught. So that the volume of storage space 10 is not less than the existing storage space for being equipped with the only air-supply assembly of front side air draught.

It should be understood that " outwardly protruding " mentioned above refers to towards the outside in air-supply space 20, direction can be Storage space 10 is also possible to the refrigerator foaming layer towards 100 rear side of liner.

In some embodiments of the invention, two groups of return air groups be may be provided on main part, each return air group includes multiple The return air inlet 201 longitudinally extended.Two return air groups can be each configured to the region of the close lateral ends positioned at main part.Specifically Ground, can be for positioned at left return air group and the right return air group in the region of lateral left and right ends of main part.Further, it returns for two groups Projection of the wind group on air duct cover board 200 is located at the projection of preceding air entry 204a and rear air entry 302 on air duct cover board 200 It is external.Air from the side (mainly both lateral sides) of volute of blower enters air-supply space 20 in storage space 10 as a result, so that The change of the flow direction of return air stream is more gentle, avoids the occurrence of more excessive steering.

The setting of 400 bilateral air draught of return air inlet 201 and centrifugal wind wheel positioned at volute of blower side of the invention reduces Steering angle needed for return air stream, and enough spaces for changing flow direction are provided for return air stream, it is convenient for back General mood stream is sustainedly and stably sucked by centrifugal wind wheel 400.Particularly, the rear side air-breathing setting of centrifugal wind wheel 400 extends return air Path, so that return air stream gently creates a further reduction return air noise, and avoids the negative pressure of storage space side too low, convenient for using Open refrigerator doors in family.

In some embodiments of the invention, air-supply assembly further includes multiple masking caps.Multiple masking caps can configure ingredient It is not set to the left or right side of multiple return air inlets 201 of return air group, in 10 side of storage space to cover return air inlet from side 201。

Specifically, the multiple masking caps in part may be disposed at 201 right side of multiple return air inlets in left return air group, and have towards a left side Opening so that the air in storage space 10 flow to from left to right masking cap on the inside of and enter left return air group in return air inlet 201.Correspondingly, the multiple masking caps of another part are set to 201 left side of multiple return air inlets in right return air group, and have towards the right side Opening, so that the air right-to-left in storage space 10 flows on the inside of masking cap and enters the return air inlet in right return air group 201.As a result, being flowed respectively from the air that the left and right sides enters air-supply space 20 towards the center of centrifugal wind wheel 400 It is dynamic, improve the suction air volume in the 400 front side air entry unit time of centrifugal wind wheel.In addition, multiple masking caps can also prevent storing empty Between in 10 the solids such as liquid or particulate debris with air enter air-supply space 20.

Fig. 7 is the schematic elevational view of part liner 100 according to an embodiment of the invention.

In some embodiments of the invention, the part liner 100 positioned at 500 lower section of evaporator is configured to towards air duct lid The bending of plate 200 extends to form water receiving bottom 101, so that the projection of evaporator 500 in the vertical direction each falls within water receiving bottom 101。

It that is to say, the water receiving tank of refrigerator can be extended to form directly by the bending of liner 100, without additional setting.Specifically, position Part liner 100 below evaporator 500 and above water receiving bottom 101 is configured to set away from the protrusion of air duct cover board 200 It sets to form water receiving side 102.Water receiving bottom 101 is configured to be higher than close to the side of air duct cover board 200 close to water receiving side 102 Side so that the water droplet fallen on towards water receiving side 102 flow.Further, water receiving side 102 and water receiving bottom 101 intersection is configured to the tilt angle for making intermediate position be lower than separate middle position, and middle position offers Discharge outlet 103103, to guide the liquid for flowing to intersection to flow out from discharge outlet 103103.

In some embodiments of the invention, water receiving side 102 can be configured to protrude towards foaming layer, further to guide Water receiving bottom 101 and 102 intersection of water receiving side are diagonally downward and far from exhaust air flue.

Refrigerator of the invention guides defrosting water by the liner 100 with water receiving shape without using water receiving tank components Discharge.The manufacturing cost of refrigerator is further decreased as a result, and while defrosting water is discharged completely for realization, avoids being connect Sink structure is coupled with liner 100.

Fig. 8 is the schematic elevational view of evaporator 500 in supply air system according to an embodiment of the invention.Fig. 9 is edge The schematic cross sectional views of cutting line C-C interception in Fig. 8.Figure 10 is the signal of fin 503 according to an embodiment of the invention Property expanded view.

In some embodiments of the invention, evaporator 500, which can have, is laterally extended and vertical spaced multiple straight Spool road 501 and the multiple transition pipes 502 for connecting straight line pipeline 501.Parallel and compartment of terrain is pacified on each straight line pipeline 501 Plate body 503a equipped with multiple fins 503, and fin 503 is configured to be arranged perpendicular to liner 100.Specifically, bias portion 503b Positioned at the side bottom away from liner 100 of plate body 503a, and it is vertical with plate body 503a.

It that is to say, an end of each fin 503 all has a bending part.Fin 503 is configurable in length Rectangular sheet, one angle is configured to bend out the plane where most of plate body 503a of fin 503, to form bias portion The bending place of the plate body 503a of 503b, bias portion 503b and fin 503 forms bias side 503c.Specifically, bias portion 503b Preferably for positioned at the angle of the lower end outside of each fin 503, with liquid such as defrosting waters in guide fins 503 along bias side 503c is towards the water droplet for flowing on the inside of each fin 503, and then on the whole dripping flash-pot 500 closer to liner 100, drop The low width requirement to water-retaining structure.

Further, in some embodiments of the invention, bias portion 503b is configured to hang down with the plate body 503a of fin 503 Straight setting, so that the end of bias portion 503b is inside as much as possible, while protects the plate body 503a and bias portion 503b of fin 503 Certain distance is held, guarantees the contact with its air is flowed through of evaporator 500, enhances its heat exchange efficiency.

Further, the multiple fins 503 installed on each straight line pipeline 501 can be configured to make its respective bias portion The overbending direction of 503b is identical, thereby guarantees that defrosting water that flash-pot 500 drips etc..Multiple straight line pipelines 501 and multiple Transition pipe 502 can collectively form snakelike pipeline, multiple fins on multiple straight line pipelines 501 of snakelike line upper portion 503 arrangement can be configured to closeer than the arrangement of multiple fins 503 on multiple straight line pipelines 501 of snakelike pipeline lower part Collection.

In some embodiments of the invention, evaporator 500 can have there are two the support plate extended vertically, respectively be located at The left support plate 504a of multiple 501 left ends of straight line pipeline, and the right support plate 504b positioned at multiple 501 right ends of straight line pipeline.Into One step, the bottom end of left support plate 504a and right support plate 504b respectively have the fin 503 with bias portion 503b, this two The bias portion 503b of a fin 503 positioned at support plate end is each configured to bend towards the middle part of straight line pipeline 501.Namely It is that the fin 503 of support plate end can have the plate body 503a and bias portion roughly the same with the fin 503 of straight line pipeline 501 503b.Particularly, the fin 503 of one of end can be configured to have identical with the fin 503 of straight line pipeline 501 Structure, the fin 503 of another end can be configured to the structure with 503 mirror symmetry of fin of straight line pipeline 501.

Specifically, positioned at the end fin 503 on straight line pipeline 501 on the overbending direction of the bias portion 503b of fin 503 Bias portion 503b be configured to the overbending direction of the bias portion 503b of 501 fin 503 of straight line pipeline on the contrary, that is to say and straight line The bias portion 503b of 501 fin 503 of pipeline is opposite to be bent.As a result, being located at the end of 500 outermost fin 503 of evaporator Towards bending on the inside of evaporator 500, the position of defrost water flowing drippage is improved, is reduced to water receiving tank or water receiving liner The requirement of 100 structure size.

Defrosting water can be realized only by bending the end angle of common fin in evaporator 500 of the invention It is moved in equal liquid dripping position, is not necessarily to other labyrinths, technical solution is simple and easy.

Further, the bias portion 503b of bending that is to say between two adjacent fins 503 and be sitting at heat exchange air-flow On the path of flowing, increases the flow-disturbing that fin 503 exchanges thermal current, improve heat exchange efficiency.

Particularly, the evaporator 500 with above-mentioned fin 503 is particularly suitable for matching installation with above-mentioned air-supply assembly. Due to the special construction of above-mentioned air-supply assembly, the regional area of liner 100 need to be to extending over general steaming inside air-supply space 20 Send out the size of device 500.And the evaporator 500 with above-mentioned fin 503 can lead defrosting water under the premise of guaranteeing heat exchange area To the inside of evaporator 500, defrosting water is prevented to be dropped in water-retaining structure (the water receiving bottom 101 that is to say liner 100) outside, thus simple 100 structure of liner is changed, liner 100 is avoided to occur to adsorb due to the setting of its own bending part or extension or install loosely Solid problem, thus further simplify the air duct cover boards 200 such as blower rear cover 300 and air duct cover board 200 water-retaining structure and The mounting structure etc. being connect with liner 100.

The present invention also provides a kind of refrigerators, with the cabinet and above-mentioned air-supply assembly at least one compartment 1.At least one A compartment 1 is refrigerator room, and air-supply assembly is set in refrigerator room.Preferably, refrigerator also have above-mentioned evaporator 500 with Simplify assembly of the air-supply assembly in refrigerator.

So far, although those skilled in the art will appreciate that present invention has been shown and described in detail herein multiple shows Example property embodiment still without departing from the spirit and scope of the present invention, still can according to the present disclosure directly Determine or deduce out many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes It is set to and covers all such other variations or modifications.

Claims (10)

1. a kind of supply air system for refrigerator, comprising:

Air duct cover board defines air-supply space with the liner of the refrigerator jointly, and be configured to by the air-supply space be located at Indoor storage space isolation between the refrigerator；

Centrifugal wind wheel is set in the air-supply space, and is configured to suck air from its axial sides and be blown out to side；Its In

Multiple return air inlets are offered on the air duct cover board, it is empty to allow the air in the storage space to enter the air-supply Between；And

The centrifugal wind wheel is configured between the air duct cover board and the liner that there are be set to the air-supply with gap It, will be described in the air entered in the air-supply space via the return air inlet the simultaneously direction from the centrifugal wind wheel in space The front side of air duct cover board and away from the air duct cover board rear side suck.

2. supply air system according to claim 1, further includes:

Volute of blower is set on the inside of the air duct cover board；And

Blower rear cover is configured to cover the front and rear sides for being buckled in the centrifugal wind wheel respectively with the volute of blower；Wherein

It is covered after the blower and offers rear air entry, to allow the centrifugal wind wheel via air entry after described by the air-supply Air sucking in space；

Preceding air entry is offered on the volute of blower, to allow the centrifugal wind wheel via the preceding air entry by the air-supply Air sucking in space.

3. supply air system according to claim 2, wherein

The air-supply assembly is configured to the lower rearward side positioned at the compartment, and top is provided with airflow channel；

Evaporator is provided in the airflow channel, the airflow channel has the air-supply for blowing to the storage space Mouthful；And

The centrifugal wind wheel is configured to that air-flow acceleration is promoted to flow up into the airflow channel and by the evaporator stream To the air outlet.

4. supply air system according to claim 3, wherein

The liner is configured to outwardly protrude away from the air duct cover board with the corresponding region of the centrifugal wind wheel, to increase position In the air-supply space of the rear air draught side of the centrifugal wind wheel.

5. supply air system according to claim 3, wherein

The part liner below the evaporator, which is configured to bend towards the air duct cover board, extends to form water receiving bottom Portion, and the projection of the evaporator in the vertical direction is made to each fall within the water receiving bottom.

6. supply air system according to claim 5, wherein

Part liner below the evaporator and above the water receiving bottom is configured to away from the air duct cover board Protrusion is arranged to form water receiving side；

The water receiving bottom is configured to be higher than close to the side of the air duct cover board close to the side of the water receiving side, so as to fall Water droplet on it is flowed towards the water receiving side；And

The intersection of the water receiving side and the water receiving bottom, which is configured to have, is lower than intermediate position far from the centre The tilt angle of position, and the middle position offers discharge outlet, to guide the liquid for flowing to the intersection described in Discharge outlet outflow.

7. supply air system according to claim 6, wherein

The evaporator has multiple fins, and a base angle of the fin is configured to bias portion, to change described in The dripping position for the water droplet that fin is fallen.

8. supply air system according to claim 2, wherein

Two groups of return air groups are provided on the air duct cover board, each return air group includes multiple return air longitudinally extended Mouthful；

The return air group is respectively left return air group and the right return air in the region of lateral left and right ends for being located at the air duct cover board Group, and projection of the two groups of return air groups on the air duct cover board is located at the preceding air entry and rear air entry in the air duct The outside of projection on cover board.

9. supply air system according to claim 8, further includes:

Multiple masking caps are configured to be set to a left side for multiple return air inlets of the return air group in the storage space side respectively Side or right side, to cover the return air inlet from side；Wherein

The multiple masking caps in part are set on the right side of the multiple return air inlet in the left return air group, and are had towards left and opened Mouthful, so that the air in storage room flows on the inside of the masking cap from left to right and enters described in the left return air group Return air inlet；

The multiple masking caps of another part are set on the left of the multiple return air inlet in the right return air group, and are had towards the right side Opening so that the air right-to-left in storage room flows on the inside of the masking cap and enters in the right return air group The return air inlet.

10. a kind of refrigerator, there is the cabinet including at least one compartment and according to any one of claims 1 to 9 send Wind system, wherein

At least one described compartment is refrigerator room, and the supply air system is set in the refrigerator room.