CN218913269U - Fan, air pipe machine indoor unit and air pipe machine - Google Patents

Abstract

The application relates to the technical field of household appliances and discloses a fan. The fan includes the spiral case, and the spiral case includes: volute coaming; the two volute side plates are respectively arranged at two sides of the volute coaming and are enclosed with the volute coaming to form a volute; at least one volute side plate is provided with a volute air inlet; the at least one air striking arc plate is provided with an air striking arc edge which is matched with part of the edge of the volute air inlet, the air striking arc edge is arranged on the outer wall surface of the volute side plate in a mode of being matched with the volute air inlet, and the air striking arc plate covers part of the outer wall surface of the volute side plate; the outer surface of the air striking arc plate protrudes out of the outer surface of the exposed part of the side plate of the volute on the corresponding side so as to form a sinking notch at the exposed part of the side plate of the volute on the corresponding side, thereby increasing the air inlet volume of the fan. By using the fan, the length of the indoor unit of the air pipe machine can be shortened on the premise of ensuring the air inlet quantity of the fan. The application also discloses an air pipe machine indoor unit and an air pipe machine.

Description

Fan, air pipe machine indoor unit and air pipe machine

Technical Field

The application relates to the technical field of household appliances, for example to a fan, an air duct indoor unit and an air duct.

Background

The air duct machine is a hidden air conditioner and generally comprises an air duct machine indoor unit and an air duct machine outdoor unit, wherein the air duct machine indoor unit is arranged in a suspended ceiling of a room, and the air duct machine has the advantages of flexible and hidden installation position, indoor space saving and the like.

In the related art, the air duct machine indoor unit comprises one or more fans, the one or more fans are arranged along the length direction of the air duct machine, and a certain distance is reserved between each fan and the side wall of the air duct machine indoor unit and/or between adjacent fans so as to ensure the air inlet quantity of the fans.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

in the related art, the air inlet amount of the fan needs to be ensured by the air pipe indoor unit with enough length, so that the length of the air pipe indoor unit is difficult to shorten, the ceiling space occupied by the air pipe indoor unit is overlarge, and the requirement of a user on reducing the installation space of the air pipe indoor unit cannot be met.

It should be noted that the information disclosed in the foregoing background section is only for enhancing understanding of the background of the present application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.

The embodiment of the disclosure provides a fan, an air pipe machine indoor unit and an air pipe machine, which can shorten the length of the air pipe machine indoor unit on the premise of ensuring the air inlet quantity of the fan.

In some embodiments, the fan comprises a volute comprising: volute coaming; the two volute side plates are respectively arranged at two sides of the volute coaming and are enclosed with the volute coaming to form the volute; at least one volute side plate is provided with a volute air inlet; the air striking arc plate is provided with an air striking arc edge which is matched with a part of the edge of the volute air inlet, the air striking arc edge is arranged on the outer wall surface of the volute side plate in a mode of being matched with the volute air inlet, and the air striking arc plate covers the part of the outer wall surface of the volute side plate; the outer surface of the air striking arc plate protrudes out of the outer surface of the exposed part of the side plate of the volute on the corresponding side so as to form a sinking notch at the exposed part of the side plate of the volute on the corresponding side, thereby increasing the air inlet volume of the fan.

In some embodiments, the volute coaming is provided with a volute air outlet, and the induced draft arc plate is arranged on one side of the volute side plate, which is close to the volute air outlet; the orthographic projection of the air striking arc edge on the volute side plate is semicircular.

In some embodiments, the air striking arc edge includes a first free end and a second free end, and the value range of the included angle α between the straight line l where the first free end and the second free end are located and the direction away from the air outlet is 30 ° to 60 °.

In some embodiments, a wind-guiding surface is arranged on one side of the wind-guiding arc edge facing the air inlet of the volute; the radius r of the induced air surface gradually decreases along the direction from the outer side to the inner side of the air inlet of the volute.

In some embodiments, the fan further comprises: the impeller is arranged in the volute and is positioned at the air inlet of the volute; the impeller can be driven to rotate so as to suck air from the air inlet of the volute to form air flow, and the formed air flow can be discharged from the air outlet of the volute.

In some embodiments, the ducted air conditioner indoor unit includes: the case is provided with a case air inlet; and one or more fans arranged at the air inlet of the case.

In some embodiments, the chassis comprises: a lower cover plate; and, a rear end plate; the case air inlet is arranged on the lower cover plate and/or the rear end plate.

In some embodiments, the chassis further comprises: a front end plate provided with a case air supply port; the volute side plate of the fan is perpendicular to the rear end plate, the volute air outlet faces the machine case air supply outlet, and the volute air outlet is used for air outlet along the horizontal direction; the machine case air inlet is rectangular, and the fans are distributed along the length direction of the machine case air inlet under the condition that the air pipe machine comprises a plurality of fans.

In some embodiments, an air inlet space is formed between the volute side plate of the fan and the side plate of the case and/or the volute side plate of an adjacent fan, and the sinking notch of the volute side plate can increase the volume of the air inlet space.

In some embodiments, the ducted air conditioner includes the ducted air conditioner indoor unit described above.

The fan, the air pipe machine indoor unit and the air pipe machine provided by the embodiment of the disclosure can realize the following technical effects:

the fan provided by the embodiment of the disclosure comprises a volute, wherein the volute comprises a volute coaming, two volute side plates and at least one induced air arc plate. At least one volute side plate is provided with a volute air inlet; the air striking arc plate is provided with an air striking arc edge which is matched with the edge of a part of the air inlet of the volute, and the air striking arc edge is arranged on the outer wall surface of the side plate of the volute in a mode of being matched with the air inlet of the volute; the outer surface of the air striking arc plate protrudes out of the outer surface of the exposed part of the volute side plate on the corresponding side so as to form a sinking notch at the exposed part of the volute side plate on the corresponding side. When the length of the air pipe indoor unit is shortened, the sinking notch of the fan can compensate for the reduction of the air inlet area caused by the shortened length of the air pipe indoor unit, and the air inlet quantity of the fan is ensured. Therefore, the air duct indoor unit provided by the embodiment of the disclosure can shorten the length of the air duct indoor unit and reduce the installation space occupied by the air duct indoor unit on the premise of ensuring the air inlet quantity of the fan.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:

FIG. 1 is a schematic diagram of a fan provided in an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of another blower provided by an embodiment of the present disclosure;

FIG. 3 is a schematic structural view of another blower provided by an embodiment of the present disclosure;

FIG. 4 is a schematic structural view of another blower provided by an embodiment of the present disclosure;

FIG. 5 is a schematic view of an air duct machine according to an embodiment of the present disclosure;

fig. 6 is a schematic structural view of another ducted air machine according to an embodiment of the present disclosure.

Reference numerals:

1. a volute; 11. volute coaming; 111. a volute air outlet; 12. a volute side plate; 121. a volute air inlet; 13. an air striking arc plate; 131. a first free end; 132. a second free end; 133. striking an arc edge; 14. sinking the notch; 15. an impeller;

2. a chassis; 21. a case air inlet; 22. a lower cover plate; 23. a rear end plate; 24. a front end plate.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe embodiments of the present disclosure and embodiments thereof and are not intended to limit the indicated device, element, or component to a particular orientation or to be constructed and operated in a particular orientation. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the embodiments of the present disclosure will be understood by those of ordinary skill in the art in view of the specific circumstances.

In addition, the terms "disposed," "connected," "secured" and "affixed" are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the embodiments of the present disclosure may be understood by those of ordinary skill in the art according to specific circumstances.

The term "plurality" means two or more, unless otherwise indicated.

In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.

It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other.

The air duct machine is a hidden air conditioner and generally comprises an air duct machine indoor unit and an air duct machine outdoor unit, wherein the air duct machine indoor unit is arranged in a suspended ceiling of a room, and the air duct machine has the advantages of flexible and hidden installation position, indoor space saving and the like. In the related art, the air duct machine indoor unit comprises one or more fans, the one or more fans are arranged along the length direction of the air duct machine, and a certain distance is reserved between each fan and the side wall of the air duct machine indoor unit and/or between adjacent fans so as to ensure the air inlet quantity of the fans.

Users want the length of the air duct indoor unit to be reduced so as to save the installation space of the air duct indoor unit. However, the air duct indoor unit of the related art needs a sufficient length to ensure the air intake of the blower, and the reduction in the length of the air duct indoor unit reduces the air intake area of the blower, resulting in a reduction in the efficiency of the blower. The length of the air pipe indoor unit in the related art is difficult to shorten, the suspended ceiling space occupied by the air pipe indoor unit is overlarge, and the requirement of a user on reducing the installation space of the air pipe indoor unit cannot be met.

Therefore, the embodiment of the disclosure provides a fan, an air duct indoor unit and an air duct machine, which can shorten the length of the air duct indoor unit on the premise of ensuring the air inlet quantity of the fan.

In one aspect, an embodiment of the present disclosure provides a blower.

With reference to fig. 1 to 4, the fan comprises a volute 1, the volute 1 comprising a volute casing 11, two volute side plates 12 and at least one striking arc plate 13.

The two volute side plates 12 are respectively arranged on two sides of the volute coaming 11, and are enclosed with the volute coaming 11 to form a volute 1, and at least one volute side plate 12 is provided with a volute air inlet 121.

The air striking arc plates 13 are in one-to-one correspondence with the volute air inlets 121, and the air striking arc plates 13 are provided with air striking arc edges 133 which are matched with part of edges of the volute air inlets 121, so that the air striking arc edges 133 are arranged on the outer wall surface of the volute side plate 12 in a mode of being matched with the volute air inlets 121, and the air striking arc plates 13 cover part of the outer wall surface of the volute side plate 12.

Wherein, the outer surface of the air striking arc plate 13 protrudes out of the outer surface of the exposed part of the corresponding side volute side plate 12 to form a sinking notch 14 at the exposed part of the corresponding side volute side plate 12, thereby increasing the air intake volume of the fan.

Therefore, the fan provided by the embodiment of the present disclosure includes the volute 1, and the volute 1 includes the volute coaming 11, two volute side plates 12, and at least one air striking arc plate 13. At least one volute side plate 12 is provided with a volute air inlet 121; the air striking arc plate 13 is provided with an air striking arc edge 133 which is matched with part of the edge of the volute air inlet 121, and the air striking arc edge 133 can be arranged on the outer wall surface of the volute side plate 12 in a mode of being matched with the volute air inlet 121; the outer surface of the air striking arc plate 13 protrudes from the outer surface of the exposed portion of the corresponding side volute side plate 12 to form a countersink 14 at the exposed portion of the corresponding side volute side plate 12. When the length of the air pipe indoor unit is shortened, the sinking notch 14 of the fan can compensate for the reduction of the air inlet area caused by the shortened length of the air pipe indoor unit, and the air inlet quantity of the fan is ensured. Therefore, the air duct indoor unit provided by the embodiment of the disclosure can shorten the length of the air duct indoor unit and reduce the installation space occupied by the air duct indoor unit on the premise of ensuring the air inlet quantity of the fan.

The air striking arc edge 133 of the air striking arc plate 13 can accelerate the air flow at the volute air inlet 121 of the fan, and establish a uniform speed field and a uniform pressure field at the volute air inlet 121 of the fan so as to reduce air flow loss and improve fan efficiency.

It will be appreciated that the air striking edge 133 of the air striking plate 13 is only disposed on a part of the edge (denoted as a first part of the edge) of the volute air inlet 121, and the rest of the edge (denoted as a second part of the edge) is not disposed with the air striking edge 133. Then, the exposed part of the volute side plate 12 is the surface of the volute side plate 12 surrounded by the edge of the second part of the volute air inlet 121 and the end of the air inducing arc edge 133.

Optionally, the edge of the outer wall surface of the volute side plate 12, which is close to the volute air inlet 121, is a first edge, and the air striking arc edge 133 is disposed on a part of the first edge along the circumferential direction of the volute air inlet 121.

In some embodiments, the volute coaming 11 is provided with a volute air outlet 111, and the air striking arc plate 13 is arranged on one side of the volute side plate 12, which is close to the volute air outlet 111; the orthographic projection of the air striking arc edge 133 on the volute side plate 12 is semicircular.

By projecting the air-striking arc edge 133 in a semicircular arc shape on the front side plate 12 of the scroll casing, the dimensions of the air-striking arc edge 133 and the sinking notch 14 can be made to fall within a proper range. Thus, the air-guiding arc edge 133 can be utilized to guide air efficiently for the fan, and the air inlet area of the fan can be reasonably increased.

Alternatively, the volute 1 includes a cylindrical portion and an extension portion extending in a tangential direction of the cylindrical portion, and the volute air outlet 111 is provided at a side of the extension portion away from the cylindrical portion.

In some embodiments, referring to fig. 2, the air striking arc edge 133 includes a first free end 131 and a second free end 132, and in the use process of the fan, the included angle α between the straight line l where the first free end 131 and the second free end 132 are located and the direction away from the air outlet direction m ranges from 30 ° to 60 °. For example, the included angle α may have a value of 30 °, 35 °, 40 °, 45 °, 50 °, 55 °, 60 °, or the like.

Because the air pipe indoor units are installed in different modes, the air pipe indoor units generally comprise two air inlet modes of back air inlet and/or lower air inlet. By limiting the value of the included angle alpha between the straight line l where the first free end 131 and the second free end 132 are located and the direction away from the air outlet direction m to the above range, two air inlet modes of back air inlet and/or lower air inlet can be simultaneously satisfied, the air inlet area of the two air inlet modes of back air inlet and/or lower air inlet is enlarged, and the inclination angle of the air inducing arc edge 133 does not need to be adjusted according to the air inlet modes.

Alternatively, the angle α may take the value of 45 °. So set up, can satisfy two kinds of air inlet modes of back air inlet and/or lower air inlet better, the expansion effect to two kinds of air inlet modes air inlet area is the same, need not to adjust the orientation of striking arc limit 133 according to the air inlet mode again.

In some embodiments, referring to fig. 3, a wind-guiding surface is disposed on a side of the wind-guiding arc edge 133 facing the volute air inlet 121; the radius r of the induced draft surface gradually decreases in the direction from the outside to the inside of the volute air intake 121.

By the arrangement, a gradually-reduced air duct can be formed at the volute air inlet 121, airflow can be accelerated at the volute air inlet 121, and a uniform speed field and a uniform pressure field can be established at the volute air inlet 121, so that airflow loss is reduced, and fan efficiency is improved.

In some embodiments, referring to fig. 3, the blower further includes an impeller 15. The impeller 15 is disposed in the volute 1, and the impeller 15 can be driven to rotate to draw air from the volute air inlet 121 to form an air flow, and can discharge the formed air flow from the volute air outlet 111.

By providing the impeller 15, the impeller 15 is driven to rotate to suck air from the volute air inlet 121 to form an air flow, and the formed air flow is discharged from the volute air outlet 111, so that air supply by the fan can be realized.

Optionally, the fan further comprises a motor and a transmission shaft, wherein the motor can drive the transmission shaft to rotate, and the transmission shaft is fixedly connected with the impeller 15. So set up, can realize the air inlet and the air supply of fan through motor drive impeller 15 rotation.

In a second aspect, an embodiment of the present disclosure provides an air duct machine indoor unit.

With reference to fig. 1 to 6, the air duct indoor unit includes a chassis 2 and one or more fans in any of the above embodiments. Wherein, the case 2 is provided with a case air inlet 21, and one or more fans in any of the above embodiments are disposed at the case air inlet 21.

Therefore, the air duct machine indoor unit provided by the embodiment of the disclosure includes the fan in any one of the embodiments. The fan comprises a volute 1, wherein the volute 1 comprises a volute coaming 11, two volute side plates 12 and at least one induced air arc plate 13. At least one volute side plate 12 is provided with a volute air inlet 121; the air striking arc plate 13 is provided with an air striking arc edge which is matched with part of the edge of the volute air inlet 121, and the air striking arc edge is arranged on the outer wall surface of the volute side plate 12 in a mode of being matched with the volute air inlet 121; the outer surface of the air striking arc plate 13 protrudes from the outer surface of the exposed portion of the corresponding side volute side plate 12 to form a countersink 14 at the exposed portion of the corresponding side volute side plate 12. When the length of the air pipe indoor unit is shortened, the sinking notch 14 of the fan can compensate for the reduction of the air inlet area caused by the shortened length of the air pipe indoor unit, and the air inlet quantity of the fan is ensured. Therefore, the air duct indoor unit provided by the embodiment of the disclosure can shorten the length of the air duct indoor unit and reduce the installation space occupied by the air duct indoor unit on the premise of ensuring the air inlet quantity of the fan.

Optionally, the air pipe machine indoor unit comprises 1-4 fans. For example, an air duct machine indoor unit includes 1, 2, 3, or 4 fans.

Alternatively, referring to fig. 4, the ducted air machine indoor unit includes 2 fans. Wherein, 2 adjacent fans share a motor, and two fans are respectively connected with a rotor of the motor through a transmission shaft. The motor can drive the drive shaft to rotate to drive the impellers 15 of the two fans to rotate.

In some embodiments, referring to fig. 5 and 6, chassis 2 includes a lower cover plate 22 and a rear end plate 23. Wherein, the case air inlet 21 is disposed on the lower cover plate 22 and/or the rear end plate 23.

By the arrangement, different installation requirements of users on the indoor unit of the air pipe machine can be met, and lower air inlet and/or rear air inlet of the indoor unit of the air pipe machine are realized.

It can be understood that when the case air inlet 21 is arranged on the lower cover plate 22, the air pipe machine indoor unit enters the air from the lower part; when the case air inlet 21 is arranged on the rear end plate 23, the air is introduced from the rear of the air pipe indoor unit.

The side of the air supply port of the fresh air pipe indoor unit is a front end plate of the case 2, and the rear end plate 23 is positioned at the rear side of the case 2 and opposite to the front end plate; the lower cover plate 22 is positioned at the bottom of the case 2, and the upper cover plate is positioned at the top of the case 2; the side plates are positioned at the left and right sides of the chassis 2. The new air pipe indoor unit sends cold air or warm air into the indoor space through the air supply opening.

In some embodiments, referring to fig. 5 and 6, chassis 2 further includes a front end plate 24. The front end plate 24 is provided with a cabinet air supply opening. The side plate 12 of the volute of the fan is perpendicular to the rear end plate 23, the air outlet 111 of the volute faces the air supply outlet of the machine box, and the air outlet 111 of the volute is used for outputting air along the horizontal direction; the chassis air inlet 21 is rectangular, and in the case that the ducted air conditioner includes a plurality of fans, the fans are distributed along the length direction of the chassis air inlet 21. So set up, can guarantee the air inlet area of fan, and can utilize the fan to realize high-efficient air supply.

The side plate 12 of the volute of the fan is perpendicular to the rear end plate 23, that is, the fan is vertically arranged at the air inlet 21 of the case; the fans are distributed along the length direction of the air inlet 21 of the case, that is, the fans are distributed along the length direction of the indoor unit of the air pipe machine.

In some embodiments, referring to fig. 4 and 5, an air intake space is formed between the side plate 12 of the volute of the fan and the side plate of the chassis 2 and/or the side plate 12 of the volute of the adjacent fan, and the sinking notch 14 of the side plate 12 of the volute can increase the air intake space.

By the arrangement, the air inlet space of the air pipe machine indoor unit can be increased. In addition, the sinking notch 14 can compensate for the reduction of the air inlet area caused by the reduction of the length of the air pipe indoor unit, so that the length of the air pipe indoor unit can be shortened on the premise of ensuring the air inlet quantity of the fan.

For example, the installation space of the fresh air indoor unit reserved by the user is small, and the fresh air indoor unit with a relatively short length is required. Under the premise of ensuring the air inlet quantity of the fan, the novel air blower indoor unit can shorten the length of the air pipe indoor unit, and the length of a suspended ceiling space occupied by the air pipe indoor unit is smaller, so that the requirement of a user on the air pipe indoor unit with shorter length can be met.

Optionally, the air duct indoor unit includes an indoor heat exchanger, the air flow generated by the fan enters the air duct indoor unit from the volute air outlet 111 of the fan, flows through the indoor heat exchanger, exchanges heat with the indoor heat exchanger, and then is sent into the indoor space through the air supply outlet of the air duct indoor unit.

The indoor heat exchanger heats the air flow flowing through the indoor heat exchanger in the case of the air duct machine operating heating mode, and cools the air flow flowing through the indoor heat exchanger in the case of the air duct machine operating cooling mode.

In a third aspect, embodiments of the present disclosure provide an air duct machine. The air duct machine comprises the air duct machine indoor unit in any embodiment.

The air duct machine provided by the embodiment of the disclosure comprises an air duct machine indoor unit, wherein the air duct machine indoor unit is provided with a fan, the fan comprises a volute 1, and the volute 1 comprises a volute coaming 11, two volute side plates 12 and at least one induced air arc plate 13. At least one volute side plate 12 is provided with a volute air inlet 121; the air striking arc plate 13 is provided with an air striking arc edge which is matched with part of the edge of the volute air inlet 121, and the air striking arc edge is arranged on the outer wall surface of the volute side plate 12 in a mode of being matched with the volute air inlet 121; the outer surface of the air striking arc plate 13 protrudes from the outer surface of the exposed portion of the corresponding side volute side plate 12 to form a countersink 14 at the exposed portion of the corresponding side volute side plate 12. When the length of the air pipe indoor unit is shortened, the sinking notch 14 of the fan can compensate for the reduction of the air inlet area caused by the shortened length of the air pipe indoor unit, and the air inlet quantity of the fan is ensured. Therefore, the air duct indoor unit provided by the embodiment of the disclosure can shorten the length of the air duct indoor unit and reduce the installation space occupied by the air duct indoor unit on the premise of ensuring the air inlet quantity of the fan.

Optionally, the air duct machine further comprises an air duct machine outdoor unit. The air pipe machine outdoor unit and the air pipe machine indoor unit are matched to realize air pipe machine heating or refrigerating.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may include structural and other modifications. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A fan comprising a volute (1), the volute (1) comprising:

a volute shroud (11);

the two volute side plates (12) are respectively arranged at two sides of the volute coaming (11) and are enclosed with the volute coaming (11) to form the volute (1); at least one volute side plate (12) is provided with a volute air inlet (121); and, a step of, in the first embodiment,

at least one air striking arc plate (13), wherein the air striking arc plate (13) is provided with an air striking arc edge (133) which is matched with part of the edge of the volute air inlet (121), the air striking arc edge (133) is arranged on the outer wall surface of the volute side plate (12) in a mode of being matched with the volute air inlet (121), and the air striking arc plate (13) covers part of the outer wall surface of the volute side plate (12);

the outer surface of the air striking arc plate (13) protrudes out of the outer surface of the exposed part of the corresponding side volute side plate (12) so as to form a sinking notch (14) at the exposed part of the corresponding side volute side plate (12).

2. The fan as claimed in claim 1, wherein,

the volute coaming (11) is provided with a volute air outlet (111), and the air striking arc plate (13) is arranged on one side of the volute side plate (12) close to the volute air outlet (111); the orthographic projection of the air striking arc edge (133) on the volute side plate (12) is semicircular.

3. The fan according to claim 2, wherein the air striking arc edge (133) comprises a first free end (131) and a second free end (132), and the included angle α between the straight line l where the first free end (131) and the second free end (132) are located and the direction away from the air outlet direction m is in the range of 30 ° to 60 °.

4. The fan as claimed in claim 1, wherein,

an air inducing surface is arranged on one side of the air inducing arc edge (133) facing the volute air inlet (121); the radius r of the induced air surface gradually decreases along the direction from the outer side to the inner side of the volute air inlet (121).

5. The blower of claim 4, further comprising:

the impeller (15) is arranged in the volute (1) and is positioned at the volute air inlet (121); the impeller (15) can be driven to rotate so as to suck air from the volute air inlet (121) to form an air flow, and the formed air flow can be discharged from the volute air outlet (111).

6. An air duct machine indoor unit, comprising:

the machine box (2) is provided with a machine box air inlet (21); and, a step of, in the first embodiment,

one or more fans according to any one of claims 1 to 5, which are arranged at the chassis air inlet (21).

7. The ducted air conditioner indoor unit according to claim 6, wherein the cabinet (2) comprises:

a lower cover plate (22); and, a step of, in the first embodiment,

a rear end plate (23);

the case air inlet (21) is arranged on the lower cover plate (22) and/or the rear end plate (23).

8. The ducted air conditioner indoor unit according to claim 7, wherein the cabinet (2) further comprises:

a front end plate (24) provided with a cabinet air supply port;

the volute side plate (12) of the fan is perpendicular to the rear end plate (23), the volute air outlet (111) faces the machine case air supply outlet, and the volute air outlet (111) is used for outputting air along the horizontal direction; the case air inlet (21) is rectangular, and under the condition that the air duct machine comprises a plurality of fans, the fans are distributed along the length direction of the case air inlet (21).

9. The air duct indoor unit of claim 8, wherein,

an air inlet space is formed between the volute side plate (12) of the fan and the side plate of the chassis (2) and/or the volute side plate (12) of the adjacent fan, and the sinking notch (14) of the volute side plate (12) can increase the volume of the air inlet space.

10. An air duct machine comprising an air duct machine indoor unit according to any one of claims 6 to 9.

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