CN220187023U - Wall penetrating type fresh air fan - Google Patents

Abstract

The utility model relates to the technical field of air conditioning, and discloses a through-wall type fresh air fan, which comprises: the air duct comprises an indoor air opening and an outdoor air opening which are oppositely arranged, and an air duct which is communicated with the indoor air opening and the outdoor air opening is limited in the air duct; the indoor housing comprises a first end and a second end, and the first end is fixedly connected to the indoor air port; the indoor air panel is detachably arranged at the second end and is provided with an air guide opening; the connecting pipe is detachably arranged between the indoor housing and the indoor wind panel. The utility model can reduce the air loss and improve the fresh air quantity flowing into the room.

Description

Through-wall fresh air fan

Technical field

This application relates to the technical field of air conditioning equipment, for example, to a through-wall fresh air fan.

Background technique

At present, with the improvement of people's living standards, fresh air blowers have received widespread attention. The fresh air fan is an effective air purification device that can circulate indoor air. On the one hand, it discharges the dirty indoor air to the outside, and on the other hand, it inputs fresh outdoor air into the room, making the room fresh all the time. Clean air.

The wall-type fresh air blower in the related art includes an indoor casing and an air outlet panel. The indoor casing is provided with an air outlet, and the air outlet panel is fixedly connected to the indoor casing and is arranged at the air outlet.

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

When the indoor part of the through-wall fresh air fan needs to be installed on the indoor ceiling, and the height of the ceiling space is greater than the length of the indoor part, the air outlet panel and the air outlet will be installed in the suspended ceiling. In this way, part of the airflow flowing out of the air outlet flows out from the air outlet on the suspended ceiling, and the other part will flow into the suspended ceiling space, resulting in a loss of air volume.

It should be noted that the information disclosed in the above background section is only used to enhance understanding of the background of the present application, and therefore may include information that does not constitute prior art known to those of ordinary skill in the art.

Utility model content

In order to provide a basic understanding of some aspects of the disclosed embodiments, a simplified summary is provided below. This summary is not intended to be a general review, nor is it intended to identify key/important elements or delineate the scope of the embodiments, but is intended to serve as a prelude to the detailed description that follows.

Embodiments of the present disclosure provide a wall-through fresh air fan to reduce air volume loss and increase the fresh air volume flowing into the room.

In some embodiments, the wall-type fresh air blower includes: an air duct, including an indoor air outlet and an outdoor air outlet arranged oppositely, and an air duct connecting the indoor air outlet and the outdoor air outlet is defined inside the air duct; and an indoor casing, including an indoor air outlet and an outdoor air outlet. One end and a second end, the first end is fixedly connected to the indoor air outlet; the indoor air panel is detachably provided at the second end, and the indoor air panel is provided with an air guide; the connecting pipe is detachably provided between the indoor cover and the second end. Between indoor wind panels.

In some embodiments, the indoor casing is configured in a cylindrical shape, and the side of the indoor wind panel facing the indoor casing is provided with an extension section that matches the shape of the indoor casing; the connecting pipe includes an oppositely arranged first connection end and a second connecting end, wherein the first connecting end is sleeved on the second end, and the extension section is sleeved on the second connecting end.

In some embodiments, the inner diameter of the first connecting end is greater than or equal to the outer diameter of the second end, and the inner diameter of the extension section is greater than or equal to the outer diameter of the second connecting end.

In some embodiments, the wall-mounted fresh air blower further includes: a plurality of guide grille strips extending in the horizontal direction and spaced apart in the vertical direction at the air guide openings, between adjacent guide grille strips. There is a limited air guide gap.

In some embodiments, the air guide grille includes: a windward side end, arranged toward the interior of the indoor casing; and a leeward side end, arranged away from the interior of the indoor casing, wherein the height of the leeward side end is lower than the height of the windward side end.

In some embodiments, the wall-type fresh air blower further includes a connection component for connecting the indoor casing and the indoor air panel. The connection component includes: a plurality of bayonet openings arranged at second intervals along the circumferential direction of the indoor casing. end; a plurality of buckles are provided on the indoor air panel in one-to-one correspondence with the bayonet, and the buckles and the bayonet are detachably snap-fitted.

In some embodiments, the wall-type fresh air blower further includes a fixing component for connecting the air duct and the indoor casing. The fixing component includes: a plurality of limiting grooves arranged at first intervals along the circumferential direction of the indoor casing. end; a plurality of limit hooks are arranged on the periphery of the indoor air outlet in one-to-one correspondence with the limit hooks, and the limit hooks cooperate with the limit grooves to form a permanent snap connection.

In some embodiments, the wall-type fresh air blower further includes: an outdoor casing, which is disposed at the outdoor air outlet; a first filter element, which is disposed at the outdoor casing; a second filter element, which is disposed at the indoor casing; and a fan, which is disposed at the outdoor air outlet. In the air duct, the fan is used to rotate clockwise to drive the fresh air flow from the outdoor air outlet to flow through the first filter element and the second filter element in sequence and then to the indoor air outlet.

In some embodiments, the first filter element includes at least a first filter screen, and the second filter element includes at least a second filter screen.

In some embodiments, the fan is also used to rotate counterclockwise to drive the fresh air flow from the indoor air outlet through the second filter element and the first filter element in sequence and then to the outdoor air outlet; wherein, the fan rotates clockwise at the first rotation speed. It is equal to or less than the second rotation speed of the wind wheel rotating counterclockwise.

The wall-through fresh air blower provided by the embodiments of the present disclosure can achieve the following technical effects:

The air duct includes an indoor air outlet and an outdoor air outlet arranged oppositely, and an air duct connecting the indoor air outlet and the outdoor air outlet is defined inside the air duct. Among them, an indoor cover is provided at the indoor air outlet, the first end of the indoor cover is fixedly connected to the indoor air outlet, the second end is detachably provided with an indoor air panel, and the indoor air panel is provided with an air guide. Wherein, a connecting pipe is detachably provided between the indoor cover and the indoor air panel. By detachably disposing a connecting pipe between the indoor casing and the indoor air panel, the connection between the indoor casing and the indoor air panel can be facilitated. That is to say, when the through-wall fresh air fan is installed in a room with a suspended ceiling, even if the indoor cover is installed in the suspended ceiling, the connecting pipe of the corresponding length can be selected according to the height of the suspended ceiling to realize the connection between the air outlet panel and the indoor cover. of connectivity. When the air outlet panel is installed at the air outlet of the suspended ceiling, and the connecting pipe is detachably installed between the indoor cover and the air outlet panel, it can prevent the airflow from the indoor cover from flowing into the suspended ceiling, and the connecting pipe can The airflow is limited to flow directly to the air guide opening of the air outlet panel, thereby ensuring the amount of fresh air flowing into the room and avoiding loss of air volume. In addition, the fixed connection between the indoor cover and the air duct prevents it from loosening under long-term air flow, thereby improving the stability and safety of the through-wall fresh air blower during use.

The above general description and the following description are exemplary and explanatory only and are not intended to limit the application.

Description of drawings

One or more embodiments are exemplified by corresponding drawings. These exemplary descriptions and drawings do not constitute limitations to the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings are not limited to scale and in which:

Figure 1 is a schematic structural diagram of a wall-mounted fresh air blower provided by an embodiment of the present disclosure;

Figure 2 is a schematic structural diagram of another through-wall fresh air fan provided by an embodiment of the present disclosure;

Figure 3 is a schematic cross-sectional view of a wall-mounted fresh air blower provided by an embodiment of the present disclosure;

Figure 4 is a partially enlarged schematic diagram of Figure 3;

Figure 5 is an exploded schematic diagram of a wall-mounted fresh air blower provided by an embodiment of the present disclosure;

Figure 6 is an exploded schematic diagram of another through-wall fresh air blower provided by an embodiment of the present disclosure.

Reference signs:

100. Hairdryer; 110. Indoor air outlet; 120. Outdoor air outlet; 200. Indoor cover; 210. First end; 220. Second end; 300. Indoor air panel; 310. Air guide; 320. Extension section; 330 , guide grille; 331, windward side end; 332, leeward side end; 400, connecting pipe; 410, first connection end; 420, second connection end; 510, bayonet; 520, buckle; 610, Limit groove; 620, limit hook; 700, outdoor cover; 810, first filter element; 820, second filter element; 900, fan.

Detailed ways

In order to understand the characteristics and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The attached drawings are for reference only and are not intended to limit the embodiments of the present disclosure. In the following technical description, for convenience of explanation, multiple details are provided to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown simplified to simplify the drawings.

The terms "first", "second", etc. in the description and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that data so used are interchangeable under appropriate circumstances for purposes of describing embodiments of the present disclosure herein. Furthermore, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

In the embodiment of the present disclosure, the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "back", etc. is based on the orientation or position shown in the drawings. Positional relationship. These terms are mainly used to better describe the embodiments of the present disclosure and its embodiments, and are not used to limit the indicated device, element or component to have a specific orientation, or to be constructed and operated in a specific orientation. Moreover, some of the above terms may also be used to express other meanings in addition to indicating orientation or positional relationships. For example, the term "upper" may also be used to express a certain dependence relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

In addition, the terms "setting", "connection" and "fixing" should be understood broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediary, or two devices, components or Internal connections between components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

Unless otherwise stated, the term "plurality" means two or more.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an "or" relationship. For example, A/B means: A or B.

The term "and/or" is an association relationship describing objects, indicating that three relationships can exist. For example, A and/or B means: A or B, or A and B.

It should be noted that, as long as there is no conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

At present, with the improvement of people's living standards, fresh air blowers have received widespread attention. The fresh air fan is an effective air purification device that can circulate indoor air. On the one hand, it discharges the dirty indoor air to the outside, and on the other hand, it inputs fresh outdoor air into the room, making the room fresh all the time. Clean air.

The wall-type fresh air blower in the related art includes an indoor casing and an air outlet panel. The indoor casing is provided with an air outlet, and the air outlet panel is fixedly connected to the indoor casing and is arranged at the air outlet. However, when the indoor part of the through-wall fresh air fan needs to be installed on the indoor ceiling, and the height of the ceiling space is greater than the length of the indoor part, the air outlet panel and the air outlet will be installed in the suspended ceiling. Case. In this way, part of the airflow flowing out of the air outlet flows out from the air outlet on the suspended ceiling, and the other part will flow into the suspended ceiling space, resulting in a loss of air volume.

Therefore, embodiments of the present disclosure provide a wall-mounted fresh air fan to reduce air volume loss and increase the fresh air volume flowing into the room.

As shown in FIGS. 1 to 6 , the wall-through fresh air fan provided by the embodiment of the present disclosure includes an air duct 100 , an indoor cover 200 , an indoor air panel 300 and a connecting pipe 400 . The hair dryer 100 includes an indoor air outlet 110 and an outdoor air outlet 120 arranged oppositely. The inside of the hair dryer 100 defines an air channel connecting the indoor air outlet 110 and the outdoor air outlet 120 . The indoor cover 200 includes a first end 210 and a second end 220 . The first end 210 is fixedly connected to the indoor air outlet 110 . The indoor air panel 300 is detachably disposed at the second end 220, and the indoor air panel 300 is provided with an air guide opening 310. The connecting pipe 400 is detachably provided between the indoor cover 200 and the indoor air panel 300 .

Optionally, the air duct 100 includes an indoor air outlet 110 and an outdoor air outlet 120 arranged oppositely, and an air duct is defined inside the air duct 100, and the air duct can communicate between the indoor air outlet 110 and the outdoor air outlet 120. In this way, the outdoor fresh air flow can flow into the air duct through the outdoor air outlet 120, flow through the air duct to the indoor air outlet 110, and then achieve the purpose of delivering fresh air indoors through the indoor air outlet 110.

Alternatively, the hairdryer 100 is configured in a circular cylinder shape. In this way, the structure is simple, easy to process, and can avoid flow dead corners in the air duct.

Optionally, the indoor air outlet 110 is arranged with an indoor cover 200 to further extend indoors. Optionally, the shape of the indoor cover 200 is adapted to the shape of the hairdryer 100, wherein both the first end 210 and the second end 220 of the indoor cover 200 are open to achieve air flow conduction. Optionally, the size of the first end 210 is adapted to the size of the hairdryer.

Optionally, the second end 220 of the indoor casing 200 is detachably provided with an indoor air panel 300. The indoor air panel 300 is provided with air guide openings 310 for circulating air flow. Among them, a detachable connecting pipe 400 is also provided between the indoor cover 200 and the indoor air panel 300. That is to say, when the through-wall fresh air fan is installed in the suspended ceiling in the room, if the indoor air panel 300 cannot protrude out of the air outlet of the suspended ceiling or be flush with the air outlet of the suspended ceiling, at this time, the air from the indoor air Part of the airflow flowing out of the air guide opening 310 of the panel 300 will flow into the space of the suspended ceiling, thereby causing a loss of fresh air volume. Therefore, a detachable connecting pipe 400 can be provided between the indoor cover 200 and the indoor air panel 300, and the indoor air panel is installed at the air outlet of the suspended ceiling. In this way, the circulation path of the airflow can be limited through the connecting pipe, thereby preventing part of the airflow from flowing into the ceiling, thereby ensuring the fresh air volume and improving user comfort.

Using the wall-through fresh air fan provided by the embodiment of the present disclosure, the air duct includes an indoor air outlet and an outdoor air outlet arranged oppositely, and the interior of the air duct is defined with an air duct connecting the indoor air outlet and the outdoor air outlet. Among them, an indoor cover is provided at the indoor air outlet, the first end of the indoor cover is fixedly connected to the indoor air outlet, the second end is detachably provided with an indoor air panel, and the indoor air panel is provided with an air guide. Wherein, a connecting pipe is detachably provided between the indoor cover and the indoor air panel. By detachably disposing a connecting pipe between the indoor casing and the indoor air panel, the connection between the indoor casing and the indoor air panel can be facilitated. That is to say, when the through-wall fresh air fan is installed in a room with a suspended ceiling, even if the indoor cover is installed in the suspended ceiling, the connecting pipe of the corresponding length can be selected according to the height of the suspended ceiling to realize the connection between the air outlet panel and the indoor cover. of connectivity. When the air outlet panel is installed at the air outlet of the suspended ceiling, and the connecting pipe is detachably installed between the indoor cover and the air outlet panel, it can prevent the airflow from the indoor cover from flowing into the suspended ceiling, and the connecting pipe can The airflow is limited to flow directly to the air guide opening of the air outlet panel, thereby ensuring the amount of fresh air flowing into the room and avoiding loss of air volume. In addition, the fixed connection between the indoor cover and the air duct prevents it from loosening under long-term air flow, thereby improving the stability and safety of the through-wall fresh air blower during use.

Optionally, the indoor casing 200 is configured in a cylindrical shape, and the indoor wind panel 300 is provided with an extension section 320 that is adapted to the shape of the indoor casing 200 on one side facing the indoor casing 200 . Optionally, the extension section 320 is detachably connected to the second end 220 of the indoor cover 200 to facilitate the installation or removal of the connecting pipe 400 . As shown in FIGS. 5 and 6 , the connecting pipe 400 includes a first connecting end 410 and a second connecting end 420 arranged oppositely. The first connecting end 410 of the connecting pipe 400 is sleeved on the second end 220 of the indoor cover 200 , and the extension section 320 is sleeved on the second connecting end 420 of the connecting pipe 400 . In this way, the installation time of the connecting pipe 400 can be saved. Furthermore, sealing fasteners may be provided at the connection between the first connection end 410 of the connection pipe 400 and the second end 220 of the indoor casing 200 to improve the stability of the connection and avoid leakage of the fresh air flow. Similarly, sealing fasteners are also provided at the connection between the second connection end 420 of the sub-connection pipe 400 and the indoor air panel 300.

Optionally, the inner diameter of the first connecting end 410 of the connecting pipe is greater than or equal to the outer diameter of the second end 220 of the indoor casing 200 , and the inner diameter of the extension section 320 of the indoor wind panel 300 is greater than or equal to the second connection of the connecting pipe 400 The outer diameter of end 420. In this way, the second end 220 of the indoor cover 200, the connecting pipe 400, and the extension section 320 of the indoor air panel 300 are connected in sequence, which facilitates the installation of the connecting pipe 400 and can avoid the leakage of fresh air flow to a certain extent.

In some embodiments, as shown in FIGS. 3 and 4 , the through-wall fresh air fan further includes a plurality of guide grilles 330 . A plurality of guide grille bars 330 extend in the horizontal direction and are spaced apart in the vertical direction at the air guide opening 310 . An air guide gap is defined between adjacent guide grille bars 310 . Through the arrangement of the guide grilles 330, the fresh air flow can flow into the room from the air guide gap, thereby guiding the fresh air flow. In addition, the setting of the guide grilles 330 can also break up the fresh air flow, thereby reducing the turbulence of the fresh air flow, avoiding direct blowing to the user, and improving the user's comfort.

Optionally, as shown in FIG. 4 , the guide grille 330 includes a windward side end 331 and a leeward side end 332 . The windward side end 331 is arranged toward the inside of the indoor casing 200 . The leeward end 332 is disposed away from the interior of the indoor enclosure 200 . The height of the leeward side end 332 is lower than the height of the windward side end 331 . With such an arrangement, the guide grilles 330 are arranged obliquely downward, thereby enabling the fresh air flow to flow from the ceiling toward the bottom, thereby allowing the fresh air flow to reach the indoor space close to the ground faster, and speeding up the indoor close to the ground. The speed of air renewal in the space improves user comfort.

In some embodiments, as shown in FIG. 6 , the wall-through fresh air fan further includes a connection component for connecting the indoor cover 200 and the indoor air panel 300 . The connection component includes a plurality of bayonet openings 510 and a plurality of buckles 520 . The plurality of bayonet openings 510 are arranged at intervals along the circumferential direction of the indoor cover 200 at the second end 220 . The plurality of buckles 520 and the plurality of bayonet openings 510 are provided on the indoor air panel 300 in one-to-one correspondence. By detachably engaging the buckle 520 with the bayonet 510, the indoor wind panel 300 and the indoor cover 200 can be quickly connected. When there is no need to provide the connecting pipe 400, the indoor air panel 300 and the indoor cover 200 are directly connected. When it is necessary to dispose the connecting pipe 400, the indoor air panel 300 and the indoor casing 200 can be quickly disassembled, so that the connecting pipe 400 is disposed between them.

Optionally, the distance between any two adjacent buckles 510 is equal, and correspondingly, the distance between any two adjacent buckles 520 is equal. In this way, the force on the second end 220 and the indoor air panel 300 can be made uniform, thereby reducing the possibility of damage due to uneven force.

In some embodiments, as shown in FIG. 5 , the wall-through fresh air blower further includes a fixing component for connecting the air duct 100 and the indoor cover 200 . The fixing assembly includes a plurality of limiting grooves 610 and a plurality of limiting hooks 620. The plurality of limiting hooks 620 are arranged on the first end 210 at intervals along the circumferential direction of the indoor cover 200 . A plurality of limiting grooves 610 and a plurality of limiting hooks 620 are provided on the periphery of the indoor air outlet 110 in one-to-one correspondence. By cooperating the limit hook 620 with the limit groove 610 to form a permanent snap connection, the hairdryer 100 and the indoor cover 200 can be fixedly connected, which is not easy to disassemble, and can ensure the safety of the indoor cover 200 during use. .

Optionally, the distance between any two adjacent limiting grooves 610 is equal, and correspondingly, the distance between any two adjacent limiting hooks 620 is equal. In this way, the force on the first end 210 and the hairdryer 1000 can be made uniform, thereby reducing the possibility of damage due to uneven force.

In some embodiments, as shown in FIG. 3 , the wall-through fresh air fan further includes an outdoor cover 700 , a first filter 810 , a second filter 820 and a fan 900 . The outdoor cover 700 is provided at the outdoor air outlet 120 . The first filter element 810 is provided on the outdoor cover 700 . The second filter element 820 is provided on the indoor cover 200 . The fan 900 is installed in the air duct. The fan 900 is used to rotate clockwise to drive the fresh air flow from the outdoor air outlet 120 to flow through the first filter element 810 and the second filter element 820 in sequence and then to the indoor air outlet 110 .

Optionally, the outdoor cover 700 is detachably provided at the outdoor air outlet 120 of the hairdryer 100 to facilitate disassembly, maintenance, and replacement. Further, a connecting pipe 400 is detachably provided between the outdoor cover 700 and the hairdryer 100 .

Optionally, the outdoor cover 700 is fixedly disposed at the outdoor air outlet 120 of the hair dryer 100 to improve stability and safety.

Driven by the fan 900, the fresh air flow flows from the outdoor air outlet 120 to the indoor air outlet 110, and flows through the first filter element 810 and the second filter element 820 in sequence, thereby achieving two filtrations of the fresh air air flow, thereby improving the efficiency of the air flow. The cleanliness of fresh air flow improves indoor air quality.

Optionally, the first filter element 810 at least includes a first filter screen, and the second filter element 820 at least includes a second filter screen.

Optionally, the first filter element 810 only includes a first filter screen, and the second filter element 820 only includes a second filter screen. In this way, dust inside the wall-through fresh air blower can be greatly reduced, and dust can be prevented from adhering to the inner wall of the air duct 100 and the fan 900 . Moreover, the filter can not only ensure large air inlet and outlet volumes, but is also low-priced, which helps reduce costs.

Optionally, the first filter element 810 only includes a filter to remove dust in the fresh air flow, and the second filter element 820 includes a HEPA plate with specific functions. The specific functions include PM2.5 removal, odor removal, aldehyde removal, and aldehyde removal. One or more types of pollutants, etc.

In some embodiments, the fan is also used to rotate counterclockwise to drive the airflow from the indoor air outlet 110 to flow through the second filter element 820 and the first filter element 810 in sequence and then to the outdoor air outlet 120 . Wherein, the first rotational speed of the fan 900 in clockwise rotation is equal to or less than the second rotational speed of the fan 900 in counterclockwise rotation.

Optionally, the fan is also used to rotate counterclockwise to drive the airflow from the indoor air outlet 110 to flow through the second filter element 820 and the first filter element 810 in sequence and then to the outdoor air outlet 120 . In this way, when the fan 900 rotates counterclockwise, the dirty airflow in the room can not only be discharged to the outdoors. At the same time, when the indoor airflow flows to the outdoor air outlet, the impurities on the second filter 820 close to the room can be blown down, and the indoor airflow can be blown down. When the air flows to the first filter element 810 through the air duct, impurities on the side of the first filter element 810 close to the external environment can also be blown down, thereby cleaning the first filter element 810 .

Optionally, the first rotational speed of the fan 900 rotating in the clockwise direction is equal to or less than the second rotational speed of the fan 900 rotating counterclockwise, so that the through-wall fresh air blower can obtain a better cleaning effect.

The foregoing description and drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples represent only possible variations. Unless explicitly required, individual components and features are optional and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. 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 can be made without departing from the scope thereof. The scope of the disclosure is limited only by the appended claims.

Claims (10)

1. A through-wall fresh air fan, characterized by including: The air duct includes an indoor air outlet and an outdoor air outlet arranged oppositely, and the interior of the air duct is limited to an air duct connecting the indoor air outlet and the outdoor air outlet; The indoor cover includes a first end and a second end, and the first end is fixedly connected to the indoor air outlet; The indoor air panel is detachably provided at the second end, and the indoor air panel is provided with an air guide; The connecting pipe is detachably arranged between the indoor cover and the indoor air panel. 2. The wall-mounted fresh air blower according to claim 1, characterized in that the indoor cover is constructed in a cylindrical shape, and the indoor air panel is provided on one side facing the indoor cover to match the shape of the indoor cover. extension; The connecting pipe includes a first connecting end and a second connecting end arranged oppositely, wherein the first connecting end is sleeved on the second end, and the extension section is sleeved on the second connecting end. 3. The wall-type fresh air blower according to claim 1, characterized in that the inner diameter of the first connecting end is greater than or equal to the outer diameter of the second end, and the inner diameter of the extension section is greater than or equal to the outer diameter of the second connecting end. 4. The wall-mounted fresh air blower according to any one of claims 1 to 3, characterized in that it also includes: A plurality of guide grille strips extend in the horizontal direction and are arranged at the air guide openings at intervals along the vertical direction. An air guide gap is defined between adjacent guide grille strips. 5. The wall-through fresh air fan according to claim 4, characterized in that the air guide grille includes: The windward side end is arranged toward the interior of the indoor casing; The leeward side end is arranged away from the interior of the indoor casing, wherein the height of the leeward side end is lower than the height of the windward side end. 6. The wall-through fresh air fan according to any one of claims 1 to 3, characterized in that it also includes a connecting component for connecting the indoor cover and the indoor air panel, and the connecting component includes: A plurality of bayonet openings are arranged at intervals along the circumferential direction of the indoor cover at the second end; A plurality of buckles are provided on the indoor air panel in one-to-one correspondence with the bayonet, and the buckles and the bayonet are detachably engaged. 7. The wall-mounted fresh air blower according to any one of claims 1 to 3, characterized in that it also includes a fixing component for connecting the air duct and the indoor cover, and the fixing component includes: A plurality of limiting grooves are arranged at intervals along the circumferential direction of the indoor cover at the first end; A plurality of limit hooks are arranged on the periphery of the indoor air outlet in one-to-one correspondence with the limit hooks. The limit hooks cooperate with the limit grooves to form a permanent snap connection. 8. The wall-mounted fresh air blower according to any one of claims 1 to 3, characterized in that it further includes: The outdoor cover is installed at the outdoor air outlet; The first filter element is installed on the outdoor cover; The second filter element is arranged on the indoor cover; The fan is arranged in the air duct, wherein the fan is used to rotate clockwise to drive the fresh air flow from the outdoor air outlet to flow through the first filter element and the second filter element in sequence and then to the indoor air outlet. 9. The wall-type fresh air blower according to claim 8, wherein the first filter element at least includes a first filter screen, and the second filter element at least includes a second filter screen. 10. The wall-mounted fresh air fan according to claim 8, characterized in that the fan is also used to rotate counterclockwise to drive the fresh air flow from the indoor air outlet to flow through the second filter element and the first filter element in sequence and then flow outdoors. tuyere; Wherein, the first rotation speed of the fan rotating clockwise is equal to or less than the second rotation speed of the wind wheel rotating counterclockwise.