CN115200197A - Air duct assembly for air flow exchange and air conditioner with same - Google Patents

Abstract

The invention provides an air duct assembly for air flow exchange and an air conditioner with the same, wherein the air duct assembly comprises: an internal pipe having a first passage formed therein for flowing an air stream; the external pipeline is sleeved outside the internal pipeline, and a second channel for circulating airflow is formed between the inner wall of the external pipeline and the outer wall of the internal pipeline; and the outer airflow actuating device is provided with a rotating part which is controlled to be rotatably arranged, is communicated with the second channel in an airflow way and is isolated from the first channel and is used for promoting the formation of the airflow passing through the second channel through rotation. The invention realizes the aim of independently configuring the airflow actuating device for the external pipeline by improving the structure of the air duct component for airflow exchange, thereby simplifying the control logic of the air exchange process and improving the flexibility.

Description

Air duct assembly for air flow exchange and air conditioner with same

Technical Field

The invention relates to the air conditioning technology, in particular to an air duct assembly for air flow exchange and an air conditioner with the same.

Background

If the indoor space is sealed for a long time, air quality may be degraded. Airflow exchange is an effective means of improving the air quality of a space. As the name suggests, the air exchange process has bidirectional air flow, which can introduce fresh air flow into the indoor space and lead out dirty air flow of the indoor space, so that two air flow channels are needed to convey air flows with different flow directions to realize air flow exchange.

However, when two air flow channels are formed by sleeving two pipelines, because the inner pipeline is sleeved on the outer pipeline and is limited by the shielding of the inner pipeline, the air flow actuating device is not separately arranged for the outer pipeline, but a common fan may be arranged at one end of the two pipelines to guide the air flow directions of the two air flow channels, which results in complicated control logic and poor flexibility of the air exchange process.

The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may comprise prior art that does not constitute known to a person of ordinary skill in the art.

Disclosure of Invention

An object of the present invention is to overcome at least one technical defect in the prior art, and to provide an air duct assembly for air exchange and an air conditioner having the same.

It is a further object of the present invention to improve the structure of the air duct assembly for air exchange by separately configuring the air flow actuating device to the external pipe, thereby simplifying the control logic of the air exchange process and increasing the flexibility.

Another further object of the present invention is to improve the air flow actuation effect of the external air flow actuation device on the air flow channel between the external pipeline and the internal pipeline of the air duct assembly, thereby improving the air exchange efficiency.

It is yet a further object of the present invention to utilize the embedded impeller to position the airflow actuation mechanism within the second narrow passageway, eliminating the airflow thrust conduction mechanism.

In particular, according to an aspect of the present invention there is provided a duct assembly for exchange of air flow, comprising:

an internal pipe having a first passage formed therein for flowing a gas flow;

the external pipeline is sleeved outside the internal pipeline, and a second channel for circulating airflow is formed between the inner wall of the external pipeline and the outer wall of the internal pipeline; and

and the outer airflow actuating device is provided with a rotating part which is controlled to be rotatably arranged, is communicated with the second passage in an airflow way and is isolated from the first passage and is used for promoting the airflow flowing through the second passage through rotation.

Optionally, the rotating part comprises an impeller which is rotatably wound around the outside of the inner pipeline, so that the impeller generates airflow thrust along the rotation axis direction when rotating, thereby promoting the formation of airflow flowing through the second channel.

Optionally, the impeller has a plurality of blades, and the plurality of blades are disposed in the second passage and are distributed at intervals along the circumferential direction of the inner pipe.

Optionally, the impeller further includes a hollow rotating shaft rotatably sleeved outside the inner pipeline; the hollow rotating shaft is provided with a first section at least partially extending into the second channel; and is provided with

The blades are arranged on the first section and rotate synchronously with the first section.

Optionally, the hollow rotating shaft further has a second section at least partially located outside the second channel and connected to the first section, the second section is one piece with the first section or fixedly connected to the first section; and is

The outer airflow actuating device further includes a power section to which the second section is connected to transmit a driving force from the power section to the first section and the plurality of blades.

Optionally, the outer surface of the second section is provided with a ring gear having a plurality of gear teeth formed circumferentially thereon for meshing engagement with the power portion.

Optionally, the power section comprises:

a motor having an output shaft; and

and the transmission gear is meshed with the ring gear, and a rotating shaft of the transmission gear is fixedly connected with an output shaft of the motor.

Optionally, the internal pipeline is a fresh air pipeline, and is used for conveying fresh air flow; and is

The external pipeline is a dirty air pipeline which is used for conveying a dirty air flow.

Optionally, the air duct assembly further comprises:

an inner airflow actuation device, comprising:

the volute is provided with a fresh air inlet communicated with the internal pipeline and a fresh air outlet used for communicating the working environment of the air duct assembly; and

and the fan is arranged in the volute and is controlled to rotate, and the fan is used for promoting the formation of airflow flowing through the first channel and flowing to the fresh air outlet through rotation.

According to another aspect of the present invention, there is also provided an air conditioner including: an air duct assembly for exchange of air streams as claimed in any one of the preceding claims.

According to the air duct assembly for air exchange and the air conditioner with the same, the structure of the air duct assembly for air exchange is improved, the external airflow actuating device is arranged in the air duct assembly, the rotating part of the external airflow actuating device is only in airflow communication with the second channel and is isolated from the first channel, and the purposes of independently configuring the airflow actuating device for an external pipeline, simplifying the control logic of an air exchange process and improving the flexibility are achieved.

Further, according to the air duct assembly for air exchange and the air conditioner having the same, the impeller is wound on the outer portion of the inner pipeline, and the impeller is configured to rotate around the inner pipeline to generate the air flow thrust in the axial direction of the impeller, and the air flow thrust in the direction is parallel to the extending direction of the second channel, so that based on the above structure, the air flow actuating effect of the external air flow actuating device on the air flow channel between the outer pipeline and the inner pipeline of the air duct assembly can be improved, and the ventilation efficiency can be improved.

Further, the air duct assembly for air exchange and the air conditioner having the same of the present invention may at least partially embed the impeller in the second passage and guide the flow of the air in the second passage when the plurality of blades of the impeller are disposed in the second passage. The embedded impeller is arranged, so that the airflow actuating mechanism can be arranged in the narrow second channel, and the airflow actuating mechanism is directly arranged in the second channel, so that the embedded impeller can directly generate airflow thrust in the second channel, a transmission mechanism of the airflow thrust can be omitted, and the flow guide device has the advantages of being exquisite in structure, good in flow guide effect and the like.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily to scale. In the drawings:

FIG. 1 is a schematic block diagram of a duct assembly for air exchange according to one embodiment of the present invention;

FIG. 2 is a schematic block diagram of another perspective of the air duct assembly for airflow exchange shown in FIG. 1;

FIG. 3 is a schematic perspective view of the air duct assembly for airflow exchange shown in FIG. 1;

FIG. 4 is a schematic block diagram of a rotating portion of the outer airflow actuating device of the duct assembly for airflow interchange shown in FIG. 1;

FIG. 5 is a schematic block diagram of an internal airflow actuator of the air duct assembly for airflow interchange shown in FIG. 1;

FIG. 6 is a schematic block diagram of an air path blocking device of an air duct assembly for airflow exchange according to one embodiment of the present invention;

FIG. 7 is a schematic perspective view of an air path blocking device of the air duct assembly for airflow exchange shown in FIG. 6;

FIG. 8 is a schematic block diagram of a fan housing of a duct assembly for airflow exchange according to one embodiment of the present invention;

fig. 9 is a schematic structural view of an indoor unit of an air conditioner according to an embodiment of the present invention.

Detailed Description

Reference now will be made in detail to embodiments of the invention, one or more examples of which are illustrated in the drawings. The examples are provided to illustrate the invention and not to limit it. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

An air duct assembly 10 for air exchange and an air conditioner having the same according to an embodiment of the present invention will be described with reference to fig. 1 to 9. In the following description, the terms "inner", "outer", "circumferential", "axial", "radial", "lateral" and the like are used for convenience and simplicity of description, and do not denote or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention.

In the description of the present embodiments, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature, i.e., one or more such features. In the description of the present invention, "a plurality" means at least two, for example, two, three, etc. Unless explicitly defined otherwise. When a feature "comprises or includes" a or some of the features that it covers, this is to be taken as an indication that other features are not excluded and that other features may further be included, unless expressly stated otherwise.

In the description of the present embodiments, reference to the description of "one embodiment," "some embodiments," "an example" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

An embodiment of the present invention provides an air duct assembly 10 for airflow exchange. FIG. 1 is a schematic block diagram of a duct assembly 10 for airflow exchange according to one embodiment of the present invention. FIG. 2 is a schematic block diagram of another perspective of the air duct assembly 10 for airflow exchange shown in FIG. 1. FIG. 3 is a schematic perspective view of the air duct assembly 10 for airflow exchange shown in FIG. 1. The air duct assembly 10 for airflow exchange may generally include an inner duct 200, an outer duct 300, and an outer airflow actuating device 400.

Wherein the interior of the inner pipe 200 forms a first passage 210 for circulating the air flow. The outer pipe 300 is sleeved outside the inner pipe 200 to form a sleeve structure. And a second passage 310 for the circulating gas flow is formed between the inner wall of the outer pipe 300 and the outer wall of the inner pipe 200. The first channel 210 and the second channel 310 are used to circulate different air flows, for example, air flows in opposite directions. The first channel 210 and the second channel 310 may be configured to selectively pass a fresh air stream or a dirty air stream. In some embodiments, the first channel 210 may be a fresh air channel for circulating a fresh air stream, while the second channel 310 is a dirty air channel for circulating a dirty air stream. In other embodiments, the first channel 210 may be a dirty air channel for circulating a dirty air stream, and the second channel 310 may be a fresh air channel for circulating a fresh air stream.

The outer airflow actuating device 400 has a rotating portion 410. The rotating portion 410 is controllably rotatably disposed in air flow communication with the second passage 310 and isolated from the first passage 210 for facilitating the formation of an air flow through the second passage 310 by rotation. The rotating portion 410 is in airflow communication with the second channel 310 and isolated from the first channel 210, which means that the airflow passing through the rotating portion 410 can pass through the second channel 310 and can not pass through the first channel 210. The air flow activated when the rotation portion 410 rotates can flow through only the second channel 310 and not through the first channel 210. The external airflow actuation device 400 is a separate airflow actuation device that is specifically provided for the external conduit 300.

The air duct assembly 10 for air exchange of the present embodiment achieves the purpose of configuring the air flow actuating device separately for the external pipe 300, thereby simplifying the control logic of the ventilation process and improving the flexibility by improving the structure of the air duct assembly 10 for air exchange, providing the external air flow actuating device 400 in the air duct assembly 10, and making the rotating portion 410 of the external air flow actuating device 400 in air flow communication only with the second channel 310 and isolated from the first channel 210. Adopt the scheme of this embodiment, both can realize carrying indoor with outdoor new trend, also can realize discharging outdoor with indoor muddy air, realize that indoor air's whole renews, improve user's healthy fresh air experience.

Since the first channel 210 is formed inside the inner duct 200 and can be connected to the outlet of the volute 510 of the fan 520, on the basis, by separately providing the outer duct 300 with the outer airflow actuating device 400, the airflow passing through the second channel 310 can independently flow under the action of the outer airflow actuating device 400, and therefore, the two airflows passing through the first channel 210 and the second channel 310 can simultaneously flow independently without interfering with each other.

Compared with the scheme that a common fan is arranged at one end of two pipelines to guide the air flows of the two air flow channels to flow, the air duct assembly 10 of the embodiment can flexibly control the flow speed and the flow of two air flows flowing through the two air flow channels, so that the fresh air is input into the indoor space and simultaneously the foul air is discharged out of the indoor space, and any one air flow can be independently selected to be input into or output out of the indoor space, so that the indoor space only inputs the fresh air or only discharges the foul air according to actual needs, and the air duct assembly has the advantages of high ventilation efficiency, good flexibility and the like, and breaks through the inherent disadvantages of the prior art.

In this embodiment, the inner pipe 200 and the outer pipe 300 may be straight pipes, respectively. Of course, in other embodiments, the inner pipe 200 or the outer pipe 300 may be an elbow pipe. The structure of the air duct assembly 10 will be further described with reference to the case where the inner pipe 200 and the outer pipe 300 are straight pipes, respectively, and those skilled in the art should be able to easily expand and change the structure based on the understanding of the various embodiments of the disclosure, so that the disclosure is not limited to the examples. The length of the inner conduit 200 may be greater than the length of the outer conduit 300, for example, both ends of the inner conduit 200 may respectively protrude through the end openings of the outer conduit 300 and be exposed.

There are various ways to place the rotating portion 410 in airflow communication with the second channel 310 and isolated from the first channel 210, for example, the rotating portion 410 may be at least partially disposed within the second channel 310; alternatively, the position of the rotating portion 410 may be indirectly communicated with the end opening of the second channel 310, for example, by an additional connecting pipe or other air path connecting structure, but is not limited thereto.

In some alternative embodiments, the rotating portion 410 includes an impeller 411, and the impeller 411 is rotatably disposed around the outside of the inner pipe 200, so that the impeller 411 generates an airflow thrust along the rotation axis direction thereof when rotating, thereby promoting the formation of the airflow passing through the second channel 310.

Fig. 4 is a schematic configuration view of a rotating portion 410 of the outer airflow actuating device 400 of the air duct assembly 10 for airflow exchange shown in fig. 1. Since the impeller 411 is rotatably provided around the outside of the inner pipe 200, the rotation axis of the impeller 411 is coaxial with the central axis of the inner pipe 200. In some embodiments, the central axis of the inner pipe 200 is coaxial with the central axis of the outer pipe 300, so that the direction of the rotation axis of the impeller 411 is parallel to the extending direction of the inner pipe 200 and the outer pipe 300, and parallel to the extending direction of the first passage 210 and the second passage 310.

By winding the impeller 411 on the outside of the inner pipe 200 and configuring the impeller 411 to rotate around the inner pipe 200 to generate an airflow thrust in the direction of the rotation axis of the impeller 411, since the airflow thrust in this direction is parallel to the extending direction of the second passage 310, based on the above-described structure, it is possible to improve the airflow actuation effect of the outside airflow actuation device 400 with respect to the airflow passage between the outer pipe 300 and the inner pipe 200 of the air duct assembly 10, thereby improving the ventilation efficiency.

The impeller 411 may be a substantially ring-shaped fan, and may be, for example, sleeved on the inner pipe 200 such that the blades 411a thereof are distributed in the second passage 310.

In some further embodiments, the impeller 411 has a plurality of blades 411a, and the plurality of blades 411a are disposed in the second channel 310 and spaced apart along the circumference of the inner conduit 200. For example, a plurality of vanes 411a may be evenly spaced along the circumference of inner conduit 200. When the plurality of blades 411a rotate, an air flow flowing in the direction of the rotation axis of the impeller 411 may be induced and may flow from the indoor space to the outdoor space.

When the plurality of blades 411a of the impeller 411 are disposed in the second channel 310, the impeller 411 may be at least partially embedded in the second channel 310 and induce a flow of air in the second channel 310. Through the arrangement of the embedded impeller 411, the arrangement of the airflow actuating mechanism in the narrow second channel 310 can be realized, and because the airflow actuating mechanism is directly arranged in the second channel 310, the embedded impeller 411 can directly generate airflow thrust in the second channel 310, so that a transmission mechanism of the airflow thrust can be omitted, and the structure is exquisite, the drainage effect is good, and the like.

In some embodiments, a plurality of blades 411a may be disposed on an annular hub and the annular hub may be disposed on inner conduit 200 to form impeller 411. The impeller 411 (e.g. its annular hub) may be drivingly connected to an external power mechanism so as to be driven by the power mechanism.

In other embodiments, the impeller 411 further includes a hollow shaft 411b rotatably disposed outside the inner pipe 200. A bearing may be installed between the hollow rotating shaft 411b and the outer wall of the inner pipe 200 to allow the hollow rotating shaft 411b to freely rotate on the outer wall of the inner pipe 200. The hollow shaft 411b has a first section that extends at least partially into the second channel 310. And a plurality of blades 411a are disposed on the first section to rotate synchronously with the first section. That is, by driving the first section of the hollow rotating shaft 411b to rotate, the blades 411a provided on the first section may be indirectly driven to rotate, thereby generating an air flow thrust in the direction of the rotation axis of the impeller 411.

With the above structure, it is possible to arrange the airflow actuating mechanism (e.g., the vane 411a provided on the first section) in the second passage 310 having a ring-shaped cross section with limited space, so that the airflow actuating mechanism is directly arranged in the second passage 310 to save space, improve structural integrity of the air duct assembly 10, and ensure that the airflow actuating effect is achieved.

In some further embodiments, the hollow shaft 411b further has a second section at least partially located outside the second channel 310 and connected to the first section, the second section being one piece with the first section or fixedly connected to the first section. In some embodiments, the section extending into the second channel 310 may be called a first section, and the section exposed outside the second channel 310 may be called a second section.

By adopting the above structure, the first section extends into the second channel 310, so that the blades 411a can be conveniently arranged in the second channel 310, and the second section extends out of the second channel 310, so that the second section can be conveniently used for connecting the power mechanism.

In some further embodiments, the outer airflow actuation arrangement 400 further comprises a power section 420, the second section being connected to the power section 420 for transmitting a driving force from the power section 420 to the first section and the plurality of vanes 411a. For example, the power portion 420 may be in transmission connection with an end of the second section far away from the first section, so that the second section rotates around its central axis under the driving force of the power portion 420, and thereby the first section and the plurality of blades 411a are driven to rotate synchronously.

In some further embodiments, the outer surface of the second section is provided with a ring gear 412, and the ring gear 412 is circumferentially formed with a plurality of gear teeth 412a for meshing engagement with the power portion 420. The ring gear 412 may be integral with the second section or may surround and be fixed to the second section. The ring gear 412 may have a substantially hollow ring shape, and the plurality of gear teeth 412a are formed on an outer circumferential surface thereof.

By providing the ring gear 412 on the outer surface of the second segment, the ring gear 412 can be used to provide a driving force for the second segment to rotate around the central rotating shaft thereof, so that the second segment smoothly drives the first segment and the plurality of blades 411a to rotate in a desired manner.

In some alternative embodiments, the power section 420 includes a motor 421 and a transfer gear 422. The motor 421 has an output shaft. The transmission gear 422 is engaged with the ring gear 412, and the rotating shaft of the transmission gear 422 is fixedly connected with the output shaft of the motor 421. For example, the rotation shaft of the driving gear 422 and the output shaft of the motor 421 may be coaxially disposed.

In other embodiments, the driving gear 422 of the power portion 420 may be omitted, for example, an output shaft of the motor 421 may be directly formed with an annular engaging gear engaged with the ring gear 412 of the second section, so as to simplify the structure of the power portion 420 and reduce the manufacturing cost.

In some alternative embodiments, the internal conduit 200 is a fresh air conduit for carrying a fresh air stream. And the external pipe 300 is a dirty air pipe for conveying a dirty air stream. With such an arrangement, since the pipe diameter of the dirty wind pipe is large, the communication area between the second channel 310 and the indoor space can be increased to some extent, thereby improving the discharge efficiency of the dirty wind stream.

The internal pipeline 200 and the external pipeline 300 which are mutually sleeved are arranged in the air duct assembly 10, the internal pipeline 200 is used for circulating fresh air flow, the external pipeline 300 is used for circulating foul air flow, the size of the air duct assembly 10 is favorably reduced, the space occupancy rate is reduced, and the attractiveness is improved.

In some alternative embodiments, the air duct assembly 10 may further include an inner airflow actuation device 500 that includes a volute 510 and a fan 520. FIG. 5 is a schematic block diagram of an internal airflow actuation device 500 of the air duct assembly 10 for airflow exchange shown in FIG. 1. The volute 510 is provided with a fresh air inlet 511 communicated with the internal pipeline 200 and a fresh air outlet 512 for communicating with the working environment of the air duct assembly 10. The fan 520 is disposed in the volute 510 and is controlled to rotate, so as to generate an airflow flowing through the first channel 210 and flowing to the fresh air outlet 512, that is, the fan 520 is configured to generate a fresh air flow flowing through the first channel 210 to the fresh air outlet 512 and discharging to the working environment through the fresh air outlet 512. The environment in which the duct assembly 10 operates may refer to the indoor space served by the duct assembly 10. The air duct assembly 10 of the present embodiment provides fresh air flow to the working environment thereof and discharges foul air flow in the working environment thereof.

The inner airflow actuating means 500 may be a centrifugal fan device, which is also provided with a motor. In some embodiments, the fresh air outlet 512 of the volute 510 may be connected to the air duct of the indoor unit casing 21 of the air conditioner in the working environment of the air duct assembly 10, so that the fresh air flowing through the first channel 210 and the fresh air outlet 512 in sequence further flows into the air duct of the indoor unit casing 21 and is exhausted through the air outlet of the indoor unit casing 21. For example, the fresh air outlet 512 of the volute 510 may be communicated with the upstream section of the air duct of the indoor unit casing 21, so that the fresh air flow may exchange heat with the heat exchanger during flowing through the air duct, and then be discharged to the working environment after exchanging heat. Certainly, the fresh air outlet 512 of the volute 510 may also be communicated with the downstream section of the air duct of the indoor unit casing 21, so that the fresh air flow may be directly discharged to the working environment in the process of flowing through the air duct, and does not exchange heat with the heat exchanger.

In some optional embodiments, the air duct assembly 10 may further include an air passage blocking device 600. FIG. 6 is a schematic block diagram of an air path blocker 600 of the air duct assembly 10 for airflow exchange according to one embodiment of the present invention. The air path blocking device 600 and other components of the air duct assembly 10 will be further described by taking the case where the inner pipeline 200 is a fresh air pipeline, the outer pipeline 300 is a dirty air pipeline, the first channel 210 is a fresh air channel, and the second channel 310 is a dirty air channel as an example.

The air path blocking device 600 includes a baffle portion 610, and the baffle portion 610 is disposed between the air outlet end portion of the second channel 310 and the air inlet end portion of the first channel 210 and is used for blocking the air flow path between the second channel 310 and the first channel 210, so as to prevent the dirty air flow flowing through the second channel 310 from flowing into the first channel 210. The air inlet end of the first channel 210 forms an air inlet of the first channel 210. The air outlet end of the second channel 310 forms an air outlet of the second channel 310.

Since the inner tube 200 and the outer tube 300 are sleeved to form a sleeve structure, the baffle portion 610 of the air path blocking device 600 may be disposed at the air outlet end of the second channel 310 (e.g., disposed downstream of the air outlet end of the second channel 310 and adjacent to the air outlet end of the second channel 310), or disposed at the air inlet end of the first channel 210 (e.g., disposed upstream of the air inlet end of the first channel 210 and adjacent to the air inlet end of the fresh air end).

The shape and structure of the baffle portion 610 in this embodiment are not particularly limited, as long as the baffle portion can block the dirty air flow or the fresh air flow from continuing to flow forward along the original flow direction. For example, the baffle portion 610 may be an annular baffle, or may be a circular baffle or an arc-shaped baffle, but is not limited thereto.

Through setting up gas circuit blocking device 600 to set up baffle portion 610 in gas circuit blocking device 600, because baffle portion 610 sets up between the air-out tip of second passageway 310 and the air inlet tip of first passageway 210, can play the effect of blocking the airflow channel between second passageway 310 and the first passageway 210, consequently based on the scheme of this embodiment, be favorable to reducing or avoiding fresh air current and foul air current to take place the mixed flow, make air duct component 10 normal performance trade the fresh air function.

In some further embodiments, the air passage blocking device 600 further includes a reversing portion 620, and the reversing portion 620 is connected to the baffle portion 610 and defines a reversing channel 630 communicating with the second channel 310. And the extension direction of the diverting passage 630 is deviated from the wind outlet direction of the second passage 310 so that the dirty wind stream flowing out of the second passage 310 flows along the diverting passage 630 to change the flow path. The air outlet direction of the second channel 310 is parallel to the extending direction of the external pipe 300. If the reversing part 620 is not provided, the dirty airflow flowing out of the second channel 310 will continue to flow along the outlet direction of the second channel 310. The deviation of the extending direction of the diverting channel 630 from the air outlet direction of the second channel 310 means that an included angle different from zero is formed between the extending direction of the diverting channel 630 and the air outlet direction of the second channel 310, so that the flow direction of the dirty air flowing out of the second channel 310 is changed when the dirty air flows through the diverting channel 630, and then the flow path is changed.

When the reversing part 620 is further disposed in the air path blocking device 600, since the reversing part 620 is connected to the baffle part 610 and defines a reversing channel 630 communicated with the second channel 310, and the extending direction of the reversing channel 630 deviates from the air outlet direction of the second channel 310, the air duct assembly 10 can guide the dirty air flow to flow towards the direction deviating from the air inlet end of the first channel 210, so as to reduce or prevent the dirty air flow from being sucked by the first channel 210 after flowing out of the second channel 310.

The diverting passage 630 may be defined by the inner wall of the diverting section 620. For example, the baffle portion 610 and the diverter portion 620 may be arranged as: the stream of the dirty air flowing out of the second channel 310 is caused to hit the baffle portion 610 head-on, then flows against the inner wall of the diverter portion 620 and changes the flow path under the direction of the diverter channel 630.

The angle between the extending direction of the diverting channel 630 and the air outlet direction of the second channel 310 may be greater than 0 ° and equal to or less than 180 °. In some embodiments, the angle between the extending direction of the diverting channel 630 and the air outlet direction of the second channel 310 is 90-180 °, and preferably, may be substantially 180 °. So configured, the flow of the dirty air out of the second channel 310 may continue in a direction opposite to the original flow direction, and thus gradually move away from the air inlet end of the first channel 210 during the flow.

In some alternative embodiments, the baffle portion 610 is disposed on the inner pipe 200, for example, the baffle portion 610 may be a ring-shaped baffle plate to be disposed on the inner pipe 200. The baffle portion 610 faces the air outlet end portion of the second passage 310, in other words, the dirty air flow flowing out of the second passage 310 can hit the baffle portion 610 head-on. The surface area of the baffle portion 610 facing the air outlet end of the second duct 310 may be larger than the opening area of the air outlet end of the second duct 310. A gap 640 is formed between the baffle portion 610 and the air outlet end portion of the second channel 310. That is, the baffle portion 610 does not closely contact the air outlet end portion of the second duct 310, and does not block the second duct 310, and the gap 640 may be a connection passage connecting the second duct 310 and the diverting duct 630.

Together, diverter portion 620 and baffle portion 610 enclose a receiving cavity 650 having a lateral opening through which outer conduit 300 is inserted to define a diverter channel 630 radially outward of outer conduit 300. That is, the diverting portion 620 and the baffle portion 610 together enclose a receiving cavity 650 with a lateral opening through which the external pipe 300 can be inserted into the receiving cavity 650, in other words, a partial section of the external pipe 300 inserted into the lateral opening is surrounded by the receiving cavity 650, and at this time, the diverting channel 630 is formed between the inner wall of the receiving cavity 650 and the radial outside of the external pipe 300 inserted into the receiving cavity 650.

Because the baffle portion 610 can be sleeved on the internal pipeline 200, and the reversing portion 620 can enclose the accommodating cavity 650 together with the baffle portion 610, into which the external pipeline 300 is inserted, the baffle portion 610 and the reversing portion 620 can completely avoid the air inlet end portion of the first channel 210, and the fresh air module can adjust the air outlet path of the dirty air flow by using a delicate structure on the premise of not blocking the first channel 210.

In some further embodiments, the baffle portion 610 is a baffle, such as an annular baffle. And the baffle portion 610 is provided with a fitting hole 611 for the inner pipe 200 to pass through, thereby achieving an interference fit, so that the baffle portion 610 can be fixed on the inner pipe 200, and air leakage at the fitting hole 611 can be avoided, and the dirty air flow flowing out from the second channel 310 can be completely received by the baffle portion 610 and change the flow direction on the surface of the baffle portion 610.

The baffle portion 610 may be a ring-shaped flat plate. Of course, in other embodiments, the baffle portion 610 may be a ring-shaped curved plate, as long as it can block the flow of the dirty wind from continuing forward along the original flow direction.

In some further embodiments, the center of the body panel of the baffle portion 610 is formed with a raised area 614 raised toward the outlet end of the second channel 310. In other words, the central section of the body panel surface of the baffle portion 610 bulges toward the air outlet end of the second duct 310, and forms a bulging region 614.

FIG. 7 is a schematic perspective view of the air path blocking device 600 of the air duct assembly 10 for airflow exchange shown in FIG. 6. The mound region 614 is configured to mound to an increasing extent in a centripetal direction, thereby forming an arc-like mound curve with a tapered cross-section. The cross section of the arc-shaped raised curved surface can be circular or elliptical. Where "cross-sectional taper" is relative to the direction of the bulge region 614, the bulge direction of the bulge region 614 is directed towards the outlet air end of the second channel 310. The "centripetal direction" may refer to a direction toward the central axis of the central region of the body panel surface of the baffle portion 610.

The fitting hole 611 is a smallest cross-sectional circle on the curved surface of the arc-shaped protrusion. That is, the fitting hole 611 is formed on an end surface of the raised area 614 opposite to the second channel 310. The ends of the raised areas 614 define assembly holes 611.

An arc-shaped connecting curved surface 615 which is gradually expanded towards the opening of the external pipeline 300 is formed on the periphery of the main body plate surface of the baffle plate portion 610, and the minimum section circle of the arc-shaped connecting curved surface 615 is overlapped with the maximum section circle on the arc-shaped raised curved surface, so that the arc-shaped connecting curved surface 615 and the arc-shaped raised curved surface are connected in a seamless mode. The arc-shaped connecting curved surface 615 surrounds the outer circumference of the maximum cross-sectional circle of the arc-shaped bulging curved surface. The curved connecting surface 615 is gradually expanded towards the opening of the external pipeline 300, that is, along the direction close to the opening of the end of the external pipeline 300, the section circle of the curved connecting surface 615 is gradually enlarged, and the tail end of the curved connecting surface 615 forms the maximum section circle; the curved connecting surface 615 is provided so that the projecting distance in the centrifugal direction toward the outer pipe 300 is increased, thereby forming a curved connecting surface 615 having a gradually expanding cross section.

The diverting part 620 is a hollow cylindrical member surrounding the peripheral section of the air outlet end of the external pipe 300, and has one end connected to the maximum cross-sectional circle of the arc-shaped connecting curved surface 615 and the other end forming a lateral opening. The peripheral section of the air outlet end of the outer pipe 300 refers to a partial section of the outer pipe 300 close to the air outlet end, for example, a tip section of the outer pipe 300. A portion of the outer duct 300 near the outlet end is inserted into the receiving cavity 650 through a lateral opening.

With the above structure, when the center of the main body panel of the baffle portion 610 forms the arc-shaped raised curved surface raised toward the outlet end of the second channel 310, and the periphery of the main body panel of the baffle portion 610 forms the arc-shaped connecting curved surface 615 gradually expanding toward the opening of the external pipe 300, the dirty airflow flowing out of the second channel 310 can flow along the smooth curved surface and gradually adjust the flow direction, so that the air duct assembly 10 can reduce the wind noise when adjusting the outlet path of the dirty airflow.

In some optional embodiments, the air duct assembly 10 may further include a dirty air filter 700, which is annular and is disposed on a peripheral section of the air outlet end of the external pipe 300 and closes the lateral opening for filtering out the foreign matters. The dirty wind filter screen 700 may be formed by splicing two semi-annular filter screens, for example, by being installed in a split manner, and being fixedly connected by a buckle, quick and easy installation can be achieved.

Since the external duct 300 is used to deliver the dirty air stream of the indoor space to the outdoor space, the outlet end of the external duct 300 is disposed in the outdoor space. By closing the side opening with the dirty air filter screen 700, foreign objects such as dust, debris, etc. in the outdoor space can be reduced or prevented from entering the second channel 310.

In some optional embodiments, the air duct assembly 10 may further include a fan housing 800, which includes a base 810, a cover 820, and a fresh air filter 830. FIG. 8 is a schematic block diagram of a hood 800 of the air duct assembly 10 for airflow exchange according to one embodiment of the present invention.

The base 810 is a hollow cylindrical member sleeved on the peripheral section of the air inlet end of the inner pipeline 200. The peripheral section of the air inlet end of the inner pipe 200 refers to a partial section of the inner pipe 200 near the air inlet end. The cover 820 expands outward from the outer wall of the cylinder of the base 810 in the axial direction to form a flared bell. Here, the outward expansion in the axial direction means that the opening of the flare faces a direction away from the first channel 210, and the central axis of the flare is coaxial with the central axis of the first channel 210.

Since the cover 820 defines the bell mouth, the opening of the bell mouth is gradually expanded outward, and thus, the cover 820 may also play a blocking role, thereby preventing the flow of the foul wind from being sucked by the first passage 210. When the wind cover 800 needs to be installed, the base 810 can be directly sleeved on the peripheral section of the air inlet end of the internal pipeline 200, and the installation process is very simple.

Fresh air filter screen 830 seals the air inlet end of inner conduit 200 to filter out foreign matter in the fresh air stream and is connected to the axial end of base 810 adjacent to the air inlet end of inner conduit 200. The fresh air filter screen 830 seals an axial end of the hollow cylindrical base 810, and also seals an air inlet end of the internal pipeline 200, so that foreign matters such as dust and debris in the outdoor space can be reduced or prevented from entering the first channel 210.

In some optional embodiments, the air duct assembly 10 may further include a cylindrical filter screen 900 disposed at the air inlet end of the outer pipe 300 and surrounding the inner pipe 200, and a filter hole is opened on the wall of the cylindrical filter screen for filtering the foreign matters. One end of the cylindrical filter screen 900 may be opened to be connected to an opening edge of the intake end of the external pipe 300, so that the inner space of the cylindrical filter screen 900 communicates with the second passage 310. The other end of the cylindrical filter 900 may be closed, for example, an annular filter sleeved on the inner pipeline 200, so that the foul air in the indoor space can only enter the inner space of the cylindrical filter 900 through the filtering holes, and then flows into the second channel 310 after being filtered.

Similar to the dirty wind filter screen 700, the cylindrical filter screen 900 may be formed by splicing two half cylindrical filter screens, for example, by being installed in a split manner, and being fixedly connected by a buckle, quick and easy installation can be achieved.

The embodiment of the invention also provides an air conditioner. The air conditioner of the present embodiment may generally include: the air duct assembly 10 for air exchange according to any of the above embodiments may further include an indoor unit 20. Fig. 9 is a schematic structural view of an indoor unit 20 of an air conditioner according to an embodiment of the present invention. The indoor unit 20 is an indoor part of a split room air conditioner for conditioning indoor air, such as cooling/heating, dehumidifying, introducing fresh air, and the like.

The internal pipe 200 is a fresh air pipe. The first duct 210 is used to communicate an outdoor space with an inner space of the cabinet 21 or an indoor space where the indoor unit 20 of the air conditioner is located. The external pipe 300 is a dirty air pipe. The second duct 310 is used to communicate the outdoor space with the indoor space where the indoor unit 20 of the air conditioner is located.

The air duct assembly 10 may be disposed separately from the indoor unit 20, or may be at least partially embedded in the casing 21 of the indoor unit 20, for example, the inner air flow actuator 500 of the air duct assembly 10 may be disposed inside the indoor unit casing 21 and communicate the fresh air outlet 512 of the volute 510 with the air duct in the indoor unit casing 21.

As shown in fig. 9, the indoor unit 20 may be a wall-mounted type, but is not limited thereto. It should be understood that the air duct assembly 10 of the present embodiment may be applied to air conditioning equipment other than the wall-mounted indoor unit 20, such as cabinet type air conditioners, window type air conditioners, etc.

The indoor unit 20 according to the embodiment of the present invention may be an indoor unit 20 of an air conditioner that performs cooling/heating through a compression refrigeration cycle, and further includes a casing 21 and an air supply fan 520. The heat exchanger is disposed in the casing 21 and is configured to exchange heat with air flowing through the casing under the action of the air supply fan 520 to form heat exchange air flow, i.e., cold air or hot air.

Thus, it should be appreciated by those skilled in the art that while various exemplary embodiments of the invention have been shown and described in detail herein, many other variations or modifications which are consistent with the principles of this invention may be determined or derived directly from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims (10)

1. An air duct assembly for exchange of air flow, comprising:

an internal pipe having a first passage formed therein for flowing an air stream;

the external pipeline is sleeved outside the internal pipeline, and a second channel for circulating airflow is formed between the inner wall of the external pipeline and the outer wall of the internal pipeline; and

and the outer airflow actuating device is provided with a rotating part which is controlled and rotatably arranged, is communicated with the second passage in an airflow way and is isolated from the first passage and is used for promoting the formation of the airflow flowing through the second passage through rotation.

2. The air duct assembly of claim 1,

the rotating part comprises an impeller which is rotatably wound outside the inner pipeline, so that the impeller generates airflow thrust along the rotating axis direction when rotating, and airflow flowing through the second channel is promoted to be formed.

3. The air duct assembly of claim 2,

the impeller is provided with a plurality of blades, and the blades are arranged in the second channel and are distributed at intervals along the circumferential direction of the inner pipeline.

4. The air duct assembly of claim 3,

the impeller also comprises a hollow rotating shaft which is rotatably sleeved outside the internal pipeline; the hollow rotating shaft is provided with a first section at least partially extending into the second channel; and is

The blades are arranged on the first section and rotate synchronously with the first section.

5. The air duct assembly of claim 4,

the hollow rotating shaft is also provided with a second section which is at least partially positioned outside the second channel and is connected with the first section, and the second section is integrated with the first section or fixedly connected with the first section; and is provided with

The outer airflow actuating device further includes a power section to which the second section is connected to transmit a driving force from the power section to the first section and the plurality of blades.

6. The air duct assembly of claim 5,

the outer surface of the second section is provided with a ring gear, and a plurality of gear teeth are formed on the circumference of the ring gear to be connected with the power part through meshing action.

7. The air duct assembly of claim 6,

the power part includes:

a motor having an output shaft; and

and the transmission gear is meshed with the ring gear, and a rotating shaft of the transmission gear is fixedly connected with an output shaft of the motor.

8. The air duct assembly of claim 1,

the internal pipeline is a fresh air pipeline and is used for conveying fresh air flow; and is

The external pipeline is a dirty air pipeline which is used for conveying a dirty air flow.

9. The air duct assembly of claim 8, further comprising:

an inner airflow actuation device, comprising:

the volute is provided with a fresh air inlet communicated with the internal pipeline and a fresh air outlet used for communicating the working environment of the air duct assembly; and

and the fan is arranged in the volute and is controlled to rotate, and the fan is used for promoting the formation of airflow flowing through the first channel and flowing to the fresh air outlet through rotation.

10. An air conditioner comprising:

an air duct assembly for exchange of air streams as claimed in any one of claims 1 to 9.

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