CN112212491A

CN112212491A - Machine and air conditioner in spiral case, air conditioning

Info

Publication number: CN112212491A
Application number: CN202011155290.9A
Authority: CN
Inventors: 肖洪力; 吴俊鸿; 李业强; 梁博; 张守信; 黄鑫
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2021-01-12

Abstract

The invention provides a volute, an air conditioner indoor unit and an air conditioner, wherein the volute (2) comprises a bottom plate (3) positioned on one side of the air inlet direction of the volute, the volute (2) further comprises at least one guide vane (4) which is arranged on the bottom plate (3) and positioned at an air outlet (5) of the volute (2), and the guide vane (4) can divide air at the air outlet (5) of the volute (2) into at least two air outlet channels. According to the invention, the airflow distribution in the direction from the flow guide wall to the volute casing is more uniform, namely the airflow at the air outlet flows more uniformly, the outlet flow of the centrifugal fan is improved, the backflow phenomenon at the volute tongue is effectively prevented and avoided, the fan efficiency is improved, the problems of low efficiency and low efficiency of the air outlet backflow of the centrifugal wall hanging machine are solved, the problems of uneven air outlet and poor comfort of the air outlet of the centrifugal wall hanging machine are solved, the disturbance and friction collision of the air outlet airflow are reduced, and the noise is reduced.

Description

Machine and air conditioner in spiral case, air conditioning

Technical Field

The invention relates to the technical field of air conditioners, in particular to a volute, an air conditioner indoor unit and an air conditioner.

Background

The prior air conditioner has more cross-flow fans, more air port flow guide components aiming at the air outlet characteristics of the cross-flow fans, relatively short air port flow guide components aiming at the air conditioner of the centrifugal fan system, high-pressure airflow at the air outlet of a centrifugal volute easily flows back to a volute tongue gap of low pressure, so that vortex loss and backflow loss are generated in the volute, the efficiency of the centrifugal fan is reduced, discontinuous vortex noise exists at the outlet of the volute, the tone quality of the air conditioner is poor, and therefore, an air guide device aiming at the air outlet characteristics of the centrifugal fan is urgently needed to dredge the airflow, improve the efficiency of the fan and reduce the noise.

Patent CN209541124U proposes an air outlet guide plate for a circular through-flow cabinet, in which a reinforcing rib and an air diffuser are arranged at an upper air outlet and a lower air outlet to define a flow channel of air flow together, so as to reduce air flow turbulence and friction collision, but the air flow is separated by a single rib, and the problem of air flow along-path resistance and air resistance of the rib to the air flow cannot be solved well. Patent CN204553346U proposes an air processing device for a volute of a centrifugal fan, which mainly sets an auxiliary volute tongue on a main volute tongue to prevent backflow, improve air supply tone, improve air supply effect, reduce power consumption of a motor, etc., but it does not have the functions of guiding air, improving turbulence and changing air outlet direction.

The invention provides a volute, an air conditioner indoor unit and an air conditioner, which are researched and designed, and solve the technical problems that the efficiency is low and the like due to the fact that the phenomenon that outlet air flows back inside the volute exists in an air conditioner indoor centrifugal wall hanging machine in the prior art.

Disclosure of Invention

Therefore, the invention aims to solve the technical problem of overcoming the defect of low efficiency caused by the phenomenon that air outlet flows back in the volute when an air conditioner indoor centrifugal wall hanging machine in the prior art is used, and provides the volute, the air conditioner indoor machine and the air conditioner.

In order to solve the above problems, the present invention provides a scroll casing, wherein:

the spiral case is including being located the bottom plate of the axial direction one side of its air inlet, the spiral case is still including setting up on the bottom plate, and be located the stator of the air outlet department of spiral case, the stator is at least one, can with the spiral case the wind of air outlet department separates into two at least air-out passageways.

Preferably, one end of the guide vane is connected with the air outlet, and the other end of the guide vane extends towards the inside of the volute; and/or the volute comprises a flow guide wall and a volute tongue, the flow guide wall and the volute tongue are arranged oppositely, the flow guide wall extends to the position of the air outlet, and the guide vane separates and guides the flow of a flow channel between the flow guide wall and the volute tongue.

Preferably, when the guide wall and the volute tongue are included: the guide vanes are more than two and are arranged side by side along the direction from the flow guide wall to the volute tongue; and/or the guide vane is a curved guide vane, and the curved shape of the guide vane is set to guide airflow towards the direction of the volute tongue.

Preferably, a plane perpendicular to the end surface of the air outlet is defined as a first plane, and the first plane is a plane where the bottom plate is located; and in the linear lengths of the projections of two or more guide vanes on the first plane: the length of a projection straight line of the guide vane relatively close to the guide wall side is longer than that of the guide vane relatively far away from the guide wall side.

Preferably, there are 4 guide vanes, 4 guide vanes are arranged in sequence along the direction from the flow guide wall to the volute tongue, and the projection straight line length of the guide vane on the first plane is L1, L2, L3 and L4 in sequence from the direction from the flow guide wall to the volute tongue, and there are: l1 (80% -100%) L, L2 (70% -80%) L, L3 (60% -70%) L, L4 (50% -60%) L, and L1> L2> L3> L4, wherein L is the length of the volute diffusion section, namely the linear distance between the volute tongue and the end face of the air outlet.

Preferably, the end face of the guide vane, which is connected with the bottom plate, is defined as a first end face, the end face of the guide vane, which is opposite to the first end face, is defined as a second end face, the distance between the first end face and the second end face is defined as a height difference H, the height differences between the first end face and the second end face of the guide vane in the direction from the guide wall to the volute tongue are H1, H2, H3 and H4 in sequence, and H1 is more than or equal to H2 and more than or equal to H3 and more than or equal to H4.

Preferably, in the two or more guide vanes, a distance from the guide vane closest to the guide wall side to the guide vane closest to the volute tongue side on the end surface of the air outlet along the direction from the guide wall to the volute tongue is h,

the distance between the flow guide wall and the connecting wall of the volute tongue along the direction from the flow guide wall to the volute tongue is K,

and h ═ 60% to 80% K.

Preferably, the end face of the guide vane that meets with the bottom plate is a first end face, the end face of the guide vane that is back to the back with the first end face is a second end face, and at the windward end of the guide vane, a torsion angle θ is formed between the tangent of a side arc of the first end face and the tangent of the same side arc of the second end face, wherein the torsion angle is an included angle between the tangent of a first position point of the blade-shaped projection on the volute bottom plate at the upper end of the blade and the tangent of a second position point of the blade-shaped projection at the bottom plate, and the first position point and the second position point are at different heights in the same vertical direction, and θ is 10 ° -30 °.

Preferably, an included angle formed between a tangent plane direction of the guide vane at the end face of the air outlet and the end face of the air outlet is β, and is greater than or equal to 90 ° and less than or equal to 150 °.

Preferably, when the guide wall and the volute tongue are included: the number of the guide vanes is 4, the 4 guide vanes are sequentially arranged along the direction from the guide wall to the volute tongue, an included angle formed between the tangential direction of the guide vanes at the end face of the air outlet and the end face of the air outlet from the direction from the guide wall to the volute tongue is beta 1, beta 2, beta 3 and beta 4, and the included angle is beta 1 to beta 1 is greater than or equal to 120 degrees and less than or equal to 150 degrees, beta 2 to 120 degrees and less than or equal to 130 degrees, beta 3 to less than or equal to 120 degrees and beta 4 to 90 degrees and less than or equal to 110 degrees.

The invention also provides an air-conditioning indoor unit, which comprises the volute and a centrifugal fan blade, wherein the centrifugal fan blade is arranged in the volute.

Preferably, the number of the centrifugal fan blades is more than two, the number of the volutes is more than two, and the centrifugal fan blades and the volutes are arranged in a one-to-one correspondence manner; and/or the presence of a gas in the gas,

the air outlet of the volute is used for discharging air towards the horizontal direction, the volute further comprises an air inlet, and the air inlet of the volute is located on the upper end face and/or the lower end face of the volute and used for feeding air from the upper side and/or feeding air from the lower side.

Preferably, the heat exchanger comprises a first heat exchanger and a second heat exchanger, the first heat exchanger is arranged above the volute, and the second heat exchanger is arranged below the volute.

The invention also provides an air conditioner which comprises the air conditioner indoor unit.

The volute, the air conditioner indoor unit and the air conditioner provided by the invention have the following beneficial effects:

according to the invention, by arranging the novel volute structure, the outlet end of the volute is provided with the guide vane, and the guide vane can evacuate the air flow discharged from the air outlet, so that the air flow is guided more towards the volute tongue part, the air flow in the direction from the guide wall to the volute is more uniformly distributed, namely the air flow at the air outlet is more uniformly distributed, the outlet flow of the centrifugal fan is improved, the phenomenon of backflow at the volute tongue part is effectively prevented and avoided, the efficiency of the fan is improved, the problem of low efficiency of the air outlet backflow of the centrifugal wall hanging machine is solved, the problem of uneven air outlet and poor comfort at the air outlet of the centrifugal wall hanging machine is solved, the disturbance and friction collision of the air flow discharged from the air outlet are; can make the air-out angle big through two centrifugal fan structures, the wide range prevents that the air current from blowing directly, improves the travelling comfort.

Drawings

FIG. 1 is the structure of the indoor unit of the air conditioner;

fig. 2 is a top internal view of the indoor unit of the air conditioner of the present invention;

fig. 3 is a schematic three-dimensional structure of a scroll casing in the indoor unit of an air conditioner according to the present invention;

fig. 4 is a top internal view of a scroll casing in the indoor unit of an air conditioner of the present invention;

fig. 5 is a three-dimensional structural view of an alternative embodiment 1 of a scroll casing in an indoor unit of an air conditioner of the present invention;

fig. 6 is a three-dimensional structural view of an alternative embodiment 2 of a scroll casing in an indoor unit of an air conditioner according to the present invention;

fig. 7 is a top internal view of an alternative embodiment 2 of a volute in an indoor unit of an air conditioner of the present invention;

fig. 8 is an enlarged view of the guide vane of the volute in the indoor unit of the air conditioner of the present invention, which is in the shape of a drop on the windward side.

The reference numerals are represented as:

1. a centrifugal fan blade; 2. a volute; 21. a flow guide wall; 22. a volute tongue; 23. an air inlet; 3. a base plate; 4. a guide vane; 41. a first end face; 42. a second end face; 5. an air outlet; 6. a heat exchanger; 61. a first heat exchanger; 62. a second heat exchanger; 8. and a controller.

Detailed Description

The term "horizontal direction" as used throughout the present invention refers to a direction parallel to the ground, the "upper" refers to a direction perpendicular to the ground and located above an object, and the "lower" refers to a direction perpendicular to the ground and located below an object.

As shown in fig. 1-8, the present invention provides a volute, wherein:

the spiral case 2 is including being located its air inlet direction one side bottom plate 3, spiral case 2 is still including setting up on the bottom plate 3, and be located the stator 4 of 5 departments of the air outlet of spiral case 2, stator 4 is at least one, can with spiral case 2 the wind of 5 departments of air outlet separates into two at least air-out passageways.

According to the invention, by arranging the novel volute structure, the outlet end of the volute is provided with the guide vane, and the guide vane can evacuate the air outlet flow, so that the air flow is guided towards the volute tongue part more, the air flow in the direction from the guide wall to the volute is more uniformly distributed, namely the air flow at the air outlet is more uniformly distributed, the outlet flow of the centrifugal fan is improved, the phenomenon of backflow at the volute tongue part is effectively prevented and avoided, the efficiency of the fan is improved, the problem of low efficiency of the air outlet backflow of the centrifugal wall hanging machine is solved, the problem of uneven air outlet and poor comfort at the air outlet of the centrifugal wall hanging machine is solved, the disturbance and friction collision of the air outlet flow are reduced, and the noise is reduced.

The invention provides a novel volute structure, which is provided with an outlet air guide device, wherein a plurality of curved guide vanes are uniformly arranged on a volute outlet bottom plate side by side and are used for evacuating air flow and improving the air outlet uniformity of a centrifugal fan; the novel volute is used for the centrifugal wall hanging machine, so that air outlet of the wall hanging machine is uniform, outlet backflow is reduced, and fan efficiency is improved. The air conditioner includes: the novel centrifugal fan comprises a shell, double centrifugal fans, a novel volute, an evaporator, a controller component and an air inlet and an air outlet. The front surface of the shell is provided with an air outlet and is communicated with volute outlets of two double-suction centrifugal fans to form a front air outlet, the upper side and the lower side of the shell are respectively provided with an air inlet to provide air inlet airflow for the double-suction centrifugal impellers, the fan component consists of the double-suction centrifugal impellers and a novel volute, the double-suction centrifugal fan blades can intake air from the upper side and the lower side and blow out air from the volute air outlet, the air outlet airflow can be more uniformly blown out from the air outlet through the diversion of curved guide vanes, meanwhile, the backflow of the air outlet can be effectively reduced by the curved guide vanes, the air quantity of the whole machine is improved (the conventional centrifugal volute has backflow at the volute tongue, the controller component is arranged at the right side of the fan component to realize independent and accurate control of the fan component due to the fact that the outflow of the outlet airflow is uneven, a V-shaped heat exchanger is arranged between the upper air inlet and the fan part, and a straight plate type heat exchanger is also arranged between the lower air inlet and the fan part.

In fig. 2, an air flow enters the centrifugal fan blade 1 through an upper air inlet and a lower air inlet centrifugal fan system respectively, passes through an upper first heat exchanger 61 and a lower second heat exchanger 62, and is pressurized under the combined action of the volute 2, so that the air flow flows out of the air outlet 5, and is subjected to the flow guide and evacuation effects of the curved guide vane 4 arranged at the air outlet 5 when passing through the air outlet 5; through set up the sparse air current that curved surface stator can be better in the wind gap, avoid the air current too concentrated, can evenly flow out, reduce backward flow and reduce the vortex.

Preferably, one end of the guide vane 4 is connected with the air outlet 5, and the other end extends towards the inside of the volute 2; and/or the volute casing 2 comprises a flow guide wall 21 and a volute tongue 22, the flow guide wall 21 is arranged opposite to the volute tongue 22, the flow guide wall 21 extends to the position of the air outlet 5, and the guide vane 4 divides and guides a flow passage between the flow guide wall 21 and the volute tongue 22.

The guide vane is a further preferable structure form of the guide vane, namely the guide vane extends to the air outlet from the bottom plate inside the air outlet, can effectively guide airflow at the air outlet to the outside of the air outlet, and separates and guides the airflow at the air outlet channel, namely the airflow is guided towards the volute tongue, so that the phenomenon that the volute tongue has too low pressure and reflows at the position due to less airflow is avoided, and the airflow flows more uniformly; the guide vane is arranged at the air outlet channel between the guide wall and the volute tongue, so that the air flow at the air outlet channel is effectively ensured to generate a better drainage effect.

Preferably, when the guide wall 21 and the volute tongue 22 are included: the number of the guide vanes 4 is more than two, and the guide vanes are arranged side by side along the direction from the flow guide wall 21 to the volute tongue 22; and/or the guide vane 4 is a guide vane with a curved surface shape, and the curved surface shape of the guide vane 4 is set to guide the airflow towards the volute tongue 22. The guide vanes are arranged side by side along the direction from the flow guide wall 21 to the volute tongue 22, so that airflow between the flow guide wall and the volute tongue can be uniformly distributed, the airflow between the volute tongue and the flow guide wall tends to be uniform more, the guide vane structure in a curved surface shape can further improve the guiding effect on the airflow, the backflow at the volute tongue and even at the whole air outlet is reduced, and the air volume of the whole machine is improved.

Preferably, the number of the guide vanes 4 is 3 to 6, and more preferably 4.

Preferably, a plane perpendicular to the end surface of the air outlet 5 is defined as a first plane, and the first plane is a plane where the bottom plate 3 is located; and two or more of the guide vanes 4 in the linear lengths of their projections on the first plane: the length of a projection straight line of the guide vane 4 relatively close to the guide wall 21 side is longer than that of the guide vane 4 relatively far from the guide wall 21 side. The arrangement form can ensure that the extension length of the guide vane on the flow guide wall side is greater than that of the guide vane on the volute tongue side, and the flow at the volute tongue is generally less than the airflow flow at the flow guide wall side, so that the structure form can further ensure that an area with large flow is preferably contacted and guided to an area with small flow by the guide vane, further improve the effect of guiding the flow towards the volute tongue, and improve the transverse uniform distribution of the airflow in the graph 4.

Preferably, there are 4

guide vanes

4, 4 guide vanes are sequentially arranged along the direction from the flow guide wall 21 to the volute tongue 22, and the projection straight lengths of the guide vanes 4 on the first plane from the flow guide wall 21 to the volute tongue 22 are L1, L2, L3 and L4, and the projection straight lengths of the 4 guide vanes on the first plane have a relationship with the length of the volute diffusion section, and there are: l1 (80% -100%) L, L2 (70% -80%) L, L3 (60% -70%) L, L4 (50% -60%) L, and L1> L2> L3> L4, wherein L is the length of the volute diffusion section, namely the linear distance between the volute tongue 22 and the end face of the air outlet 5. This is a further preferred embodiment of the guide vanes of the invention, which are arranged side by side, i.e. the extension length decreases from left to right in fig. 4, which further improves the effect of the flow guidance towards the volute tongue and further improves the lateral uniformity of the air flow in fig. 4.

As shown in fig. 3, because the centrifugal volute has a high wind speed at the side far from the volute tongue, a large flow rate, and a large amount of airflow flows out from the side far from the volute tongue, the airflow at the side needs to be guided to the position where the flow rate at the side of the volute tongue is small, and the outlet uniformity of the whole outlet is ensured, so that the curved guide vane arc length L1-L4 and the volute diffuser length L satisfy the above relationship, and the outlet uniformity can be improved, and backflow can be prevented.

Preferably, as shown in fig. 5, an end surface of the guide vane 4 connected to the bottom plate 3 is defined as a first end surface 41, an end surface of the guide vane 4 opposite to the first end surface 41 is defined as a second end surface 42, a distance between the first end surface 41 and the second end surface 42 is defined as a height difference H, and a distance between the first end surface 41 and the second end surface 42 of the guide vane 4 relatively close to the side of the guide wall 21 in a direction from the guide wall 21 to the volute tongue 22 is greater than a distance between the first end surface 41 and the second end surface 42 of the guide vane 4 relatively far from the side of the guide wall 21. Because the position air current velocity of the stator blade that is close to the water conservancy diversion wall side is located is high, and the flow is big, and the position velocity of flow that the stator blade that is close to the snail tongue side is located is less, and the flow is little, consequently design curved surface stator has certain difference in height, can make the regional air current that the big velocity of flow is high better deflect and flow to the region that the little velocity of flow is little, makes the air outlet air current more even, and can effectively prevent the back flow of snail tongue side, the noise reduction improves tone quality, improves the air supply effect.

Preferably, the height difference between the first end surface 41 and the second end surface 42 of the guide vane 4 in the direction from the flow guide wall 21 to the volute tongue 22 is H1, H2, H3 and H4 in sequence, and H1 is more than or equal to H2 and more than or equal to H3 and more than or equal to H4. This is a further preferred embodiment of the guide vanes of the invention, which are arranged side by side, i.e. the extension height decreases from left to right in fig. 5, which further improves the effect of flow guidance towards the volute tongue and further improves the lateral uniformity of the air flow in fig. 5.

As shown in fig. 4, preferably, in the two or more guide vanes 4, the distance between the guide vane 4 closest to the guide wall 21 side and the guide vane 4 closest to the volute tongue 22 side on the end surface of the air outlet 5 along the direction from the guide wall 21 to the volute tongue 22 is h,

the distance between the flow guide wall 21 and the connecting wall of the volute tongue 22 at the end face of the air outlet 5 along the direction from the flow guide wall 21 to the volute tongue 22 is K,

and h ═ 60% to 80% K.

The shared outlet width h of stator has certain relation with spiral case outlet width K, and the shared outlet width of stator is too big, influences the outflow of air current, and the shared outlet width undersize of stator, the effect of water conservancy diversion that plays that can not be fine again, for guaranteeing effective air-out area, h ═ 75% K, preferred value h ═ 75% K

Preferably, the end face of the guide vane 4 connected to the bottom plate 3 is a first end face 41, the end face of the guide vane 4 opposite to the first end face 41 is a second end face 42, and at the windward end of the guide vane 4, a torsion angle θ is formed between a tangent of a side arc line of the first end face 41 and a tangent of the same side arc line of the second end face 42, and θ is 10 ° to 30 °. As shown in fig. 6 and 7, for another alternative implementation of the novel volute, the curved guide vane can be designed as a non-straight blade, the curved guide vane can be designed as a twisted blade with a certain twist angle θ, wherein the twist angle is an included angle between a tangent line of a first position point of a blade shape projected onto a bottom plate of the volute at the upper end of the blade and a tangent line of a second position point of the blade shape at the bottom plate, the first position point and the second position point are different heights in the same vertical direction, and the twist angle θ is 10 ° to 30 °.

Preferably, an included angle formed between a tangent plane direction of the guide vane 4 at the end face of the air outlet 5 and the end face of the air outlet 5 is β, and is greater than or equal to 90 ° and less than or equal to 150 °. By setting the inclination angle beta between 90 degrees and 150 degrees, the airflow can be deflected better, and the flow guiding effect on the airflow is further improved.

Preferably, when the guide wall 21 and the volute tongue 22 are included: the number of the guide vanes is 4, the 4 guide vanes 4 are sequentially arranged along the direction from the guide wall 21 to the volute tongue 22, and an included angle formed between the tangential direction of the guide vane 4 at the end face of the air outlet 5 and the end face of the air outlet 5 from the direction from the guide wall 21 to the volute tongue 22 is β 1, β 2, β 3 and β 4 in sequence, and 120 ° β 1 ≦ 150 °, 120 ° β 2 ≦ 130 °, 110 ° β 3 ≦ 120 °, 90 ° β 4 ≦ 110 °. The inclination angle β of the curved guide vane is related to the air flow velocity and direction at the tuyere, and in order to further better deflect the air flow, it is preferable to satisfy the condition that β 1 is larger than or equal to 120 ° -150 °, β 2 is larger than or equal to 120 ° -130 °, β 3 is larger than or equal to 110 ° -120 °, and β 4 is larger than or equal to 90 ° -110 °, so as to further improve the effect of guiding the air flow toward the volute tongue, and further improve the transverse uniform distribution of the air flow in fig. 4.

Preferably, the projection shape of the windward end of the guide vane 4 on the bottom plate 3 is a 'drop shape'; and/or the guide vane 4 and the bottom plate 3 are integrally formed or detachably connected. The windward side of the curved guide vane is in a 'drop shape' design, so that the curved guide vane is more in line with the flow characteristic of fluid, the wind resistance of the guide vane is reduced, and the flow loss in a flow channel is reduced; the curved guide vane can be integrally formed with the volute and can also be manufactured into a detachable installation module, and the curved guide vane is punched at the corresponding position of the volute by a screw through arranging a screw hole position on the curved guide vane to realize a detachable flow guide structure; the novel volute is used for the centrifugal wall hanging machine, so that air outlet of the wall hanging machine is uniform, outlet backflow is reduced, and fan efficiency is improved.

The invention also provides an air-conditioning indoor unit, which comprises the volute and a centrifugal fan blade 1, wherein the centrifugal fan blade 1 is arranged in the volute 2. According to the volute, the centrifugal fan is arranged in the volute and used for sucking air and blowing air, the curved guide vanes are arranged at the outlet end of the volute and disperse the air outlet flow, so that the air outlet flow is more uniform, and the problem of low efficiency due to air outlet backflow of a centrifugal wall hanging machine is solved; the problems of uneven air outlet and poor comfort of the air outlet of the centrifugal wall hanging machine are solved; the outlet backflow of the centrifugal fan is effectively prevented, and the fan efficiency is improved; the outlet flow of the centrifugal fan is improved, so that the flow of the air port is more uniform; the disturbance and the friction collision of the air outlet flow are reduced, and the noise is reduced; the air outlet angle is large, the range is wide, the air flow is prevented from being blown straight, and the comfort is improved.

Preferably, the number of the centrifugal fan blades 1 is more than two, the number of the volutes 2 is more than two, and the centrifugal fan blades 1 and the volutes 2 are arranged in a one-to-one correspondence manner; and/or the presence of a gas in the gas,

the air outlet 5 of the volute 2 is air-out towards the horizontal direction, the volute 2 further comprises an air inlet 23, and the air inlet 23 of the volute is positioned on the upper end surface and/or the lower end surface of the volute 2 so as to intake air from the upper side and/or intake air from the lower side.

According to the invention, through more than two centrifugal fan blades and the volute structures arranged one by one, the air outlet angle and the air outlet range can be further increased, the air flow is prevented from blowing straight, and the comfort is further improved; and the volute is preferably set to be in a structural form of air inlet from top to bottom and air outlet from the front.

Preferably, the heat exchanger 6 is further included, and the heat exchanger 6 includes a first heat exchanger 61 and a second heat exchanger 62, wherein the first heat exchanger 61 is disposed above the volute 2, and the second heat exchanger 62 is disposed below the volute 2. Because the air inlets in two directions (preferably, the air inlets are arranged up and down), the heat exchanger is required to be arranged between the volute bodies entering the centrifugal fan, the airflow entering the first air inlet enters the centrifugal fan after heat exchange through the first heat exchanger and is blown out, the airflow entering the second air inlet enters the centrifugal fan after heat exchange through the second heat exchanger and is blown out, the heat exchange area is increased, and the heat exchange effect is improved.

In fig. 1, the air flow enters the centrifugal fan system from the upper air inlet and the lower air inlet respectively, passes through the first heat exchanger 61 at the upper part and the second heat exchanger 62 at the lower part and then enters the centrifugal fan blade 1, and the air current is pressurized under the combined action of the volute 2, so that the air current flows out from the air outlet 5, the air current can be subjected to the diversion and evacuation actions of the guide vane 4 which is arranged on the curved surface at the air outlet 5 when passing through the air outlet, the hidden danger that condensed water drops into the air inlet machine and dust deposition drops into the air inlet machine exists in the upper evaporator of the air conditioner, therefore, the inclination angle of the V-shaped evaporator must meet the requirement that the angle is more than or equal to 35 degrees, meanwhile, the controller 8 can independently and accurately control the two centrifugal fans, so that the rotating speeds of the two centrifugal fans can be adjusted according to working condition requirements, and the operation and the stop of the fans can be selectively controlled according to requirements, so that the air outlet and the air volume of the air conditioner can meet the requirements of a human body, and the comfort is improved.

Preferably, the first heat exchanger 61 is a heat exchanger with a vertical section in a "V" shape or a heat exchanger with a vertical section in a "W" shape, the "V" port of the "V" shaped heat exchanger faces upward, and the "W" port of the "W" shaped heat exchanger faces upward; and/or the second heat exchanger 62 is a horizontally arranged straight plate heat exchanger. According to the invention, the first heat exchanger is arranged above the fan and is arranged into the V-shaped heat exchanger or the W-shaped heat exchanger, the V-shaped opening faces upwards, and the W-shaped opening faces upwards, so that condensed water formed by condensation of air flow through the evaporator can be effectively collected, and the condensed water is prevented from dropping into the fan to cause potential safety hazards; according to the preferred arrangement form of the second heat exchanger positioned below the fan, the heat exchanger positioned below the fan has no hidden trouble that condensed water falls into the fan, so that the heat exchanger is considered to be a horizontally arranged straight plate heat exchanger, the heat exchange area can be increased, and the heat exchange effect is improved.

Preferably, when the first heat exchanger 61 is a heat exchanger with a V-shaped longitudinal section, the V-shaped heat exchanger includes a first straight plate section and a second straight plate section, and an included angle between the first straight plate section and a horizontal plane is greater than or equal to 35 °, and an included angle between the second straight plate section and the horizontal plane is greater than or equal to 35 °. The invention also can further effectively avoid the evaporator from dripping water and dropping ash into the fan by setting the included angle between the two straight sections of the V-shaped heat exchanger and the horizontal direction to be more than 35 degrees, thereby ensuring the safe operation of the fan.

The invention also provides an air conditioner which comprises the air conditioner indoor unit. The invention provides a novel volute structure which is provided with an outlet air guide device, is composed of a plurality of curved guide vanes, is used for evacuating airflow, improves the air outlet uniformity of a centrifugal fan, and solves the problems of uneven air outlet, outlet backflow, low fan efficiency, high noise and the like of a centrifugal wall hanging machine.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention. The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A spiral casing, characterized by:

spiral case (2) are including being located bottom plate (3) of its air inlet direction one side, spiral case (2) are still including setting up on bottom plate (3), and be located stator (4) of air outlet (5) department of spiral case (2), stator (4) are at least one, can with spiral case (2) the wind of air outlet (5) department separates into two at least air-out passageways.

2. The spiral casing of claim 1 wherein:

one end of the guide vane (4) is connected with the air outlet (5), and the other end extends towards the inside of the volute (2); and/or the volute (2) comprises a flow guide wall (21) and a volute tongue (22), the flow guide wall (21) is arranged opposite to the volute tongue (22), the flow guide wall (21) extends to the position of the air outlet (5), and the guide vane (4) divides and guides a flow passage between the flow guide wall (21) and the volute tongue (22).

3. The spiral casing of claim 2 wherein:

when comprising the guide wall (21) and the volute tongue (22): the guide vanes (4) are more than two and are arranged side by side along the direction from the flow guide wall (21) to the volute tongue (22); and/or the guide vane (4) is a curved guide vane, and the curved shape of the guide vane (4) is set to guide airflow towards the direction of the volute tongue (22).

4. The spiral casing of claim 3 wherein:

a plane perpendicular to the end face of the air outlet (5) is defined as a first plane, and the first plane is a plane where the bottom plate (3) is located; and in the linear lengths of the projections of two or more guide vanes (4) on the first plane: the length of a projection straight line of the guide vane (4) relatively close to the side of the flow guide wall (21) is longer than that of the guide vane (4) relatively far away from the side of the flow guide wall (21).

5. The spiral casing of claim 4 wherein:

the number of the guide vanes (4) is 4, the 4 guide vanes are sequentially arranged along the direction from the flow guide wall (21) to the volute tongue (22), the projection straight line length of the guide vanes (4) on the first plane is sequentially L1, L2, L3 and L4 from the direction from the flow guide wall (21) to the volute tongue (22), and the guide vanes are provided with: l1 (80% -100%) L, L2 (70% -80%) L, L3 (60% -70%) L, L4 (50% -60%) L, and L1> L2> L3> L4, wherein L is the diffusion section length of the volute, namely the straight-line distance between the volute tongue (22) and the end face of the air outlet (5).

6. The spiral casing of any of claims 3 to 5, wherein:

defining the guide vane (4) with the terminal surface that bottom plate (3) meet is first terminal surface (41), the guide vane (4) with the terminal surface that first terminal surface (41) carried on the back is second terminal surface (42), the distance between first terminal surface (41) and second terminal surface (42) is difference in height H:

the height difference between the first end face (41) and the second end face (42) of the guide vane (4) in the direction from the flow guide wall (21) to the volute tongue (22) is H1, H2, H3 and H4 in sequence, and H1 is more than or equal to H2 and more than or equal to H3 and more than or equal to H4.

7. The spiral casing of any of claims 3 to 6 wherein:

among the more than two guide vanes (4), the distance between the guide vane (4) closest to the guide wall (21) side and the guide vane (4) closest to the volute tongue (22) side on the end surface of the air outlet (5) along the direction from the guide wall (21) to the volute tongue (22) is h,

the distance between the flow guide wall (21) and the connecting wall of the volute tongue (22) at the end surface of the air outlet (5) along the direction from the flow guide wall (21) to the volute tongue (22) is K,

and h ═ 60% to 80% K.

8. The spiral casing of any of claims 3 to 7, wherein:

the end face that stator (4) and bottom plate (3) meet is first end face (41), the terminal surface of stator (4) with first end face (41) back to the back is second end face (42), and be in the windward end department of stator (4), press from both sides between the tangent line of a side arc line of first end face (41) and the tangent line of the same side arc line of second end face (42) and establish torsion angle theta, wherein torsion angle is the contained angle between the tangent line of the first position point on blade upper end lobate projection to the spiral case bottom plate and the tangent line of the second position point of lobate at bottom plate department lobate, and first position point and second position point are for being located the different height on same vertical direction to theta is 10 ° -30 °.

9. The spiral casing of any of claims 1 to 8 wherein:

the guide vane (4) is located the tangent plane direction of the terminal surface department of air outlet (5) and the contained angle that becomes between the terminal surface of air outlet (5) is beta to 90 ≦ beta ≦ 150.

10. The spiral casing of claim 9 wherein:

when comprising the guide wall (21) and the volute tongue (22): the guide vanes are 4, the 4 guide vanes (4) are sequentially arranged along the direction from the guide wall (21) to the volute tongue (22), an included angle formed between the tangential direction of the guide vane (4) at the end face of the air outlet (5) and the end face of the air outlet (5) from the direction from the guide wall (21) to the volute tongue (22) is beta 1, beta 2, beta 3 and beta 4, 120 degrees is less than or equal to beta 1 and 150 degrees, 120 degrees is less than or equal to beta 2 and 130 degrees, 110 degrees is less than or equal to beta 3 and 120 degrees, and 90 degrees is less than or equal to beta 4 and 110 degrees.

11. An air conditioning indoor unit, characterized in that: the spiral casing of any of claims 1 to 10, further comprising a centrifugal fan blade (1), the centrifugal fan blade (1) being arranged in the spiral casing (2).

12. An indoor unit of an air conditioner according to claim 11, wherein:

the centrifugal fan blades (1) are more than two, the volutes (2) are more than two, and the centrifugal fan blades (1) and the volutes (2) are arranged in a one-to-one correspondence manner; and/or the presence of a gas in the gas,

the air outlet (5) of the volute (2) is air-out towards the horizontal direction, the volute (2) further comprises an air inlet (23), and the air inlet (23) of the volute is located on the upper end face and/or the lower end face of the volute (2) to supply air from the upper side and/or supply air from the lower side.

13. An indoor unit of an air conditioner according to any one of claims 11 to 12, wherein:

the heat exchanger (6) comprises a first heat exchanger (61) and a second heat exchanger (62), the first heat exchanger (61) is arranged above the volute (2), and the second heat exchanger (62) is arranged below the volute (2).

14. An air conditioner, characterized in that: an indoor unit of an air conditioner comprising any one of claims 11 to 13.