Floor-standing air conditioner indoor unit

Abstract

The present invention discloses a floor-mounted air conditioner indoor unit. The floor-mounted air conditioner indoor unit includes a housing, an air duct assembly, and a switch door assembly. The housing is formed with an air inlet and a first air outlet, and the air flow path from the air inlet to the first air outlet is the first air flow path. The air duct assembly is disposed inside the housing, and the air duct assembly includes an air impeller which is located on the first air flow path. The switch door assembly includes a switch door and a protection door. The switch door is slidably disposed at the first air outlet to open or close the first air outlet. The protection door is linked with the switch door so that when the first air outlet is in an open state, the protection door is located on the first air flow path. The protection door is provided with a hollow area for air flow to pass through, and when the protection door is located on the first air flow path, the protection door is located downstream of the air impeller. The floor-mounted air conditioner indoor unit has the characteristics of high assembly efficiency and low production cost.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and particularly to a floor-standing air conditioner indoor unit. Background Art

[0002] Conventional floor-standing air conditioner indoor units generally include a housing, an air duct assembly, and a switch door assembly. An air inlet and an air outlet are formed on the housing. The air duct assembly is disposed inside the housing. The air duct of the air duct assembly communicates the air inlet and the air outlet, and an air wheel is disposed in the air duct. The switch door assembly is disposed at the air outlet to open or close the air outlet. When the floor-standing air conditioner indoor unit is operating, the air outlet is opened and the air wheel rotates at a high speed. If a user's hand touches the air wheel through the air outlet, it will cause injury. If foreign objects fly into the air outlet from the outside, it will cause damage to the air wheel. To solve the above problems, a protective net is usually provided in the air duct of the air duct assembly of the conventional floor-standing air conditioner indoor unit to block the user from the air wheel. However, the conventional protective net needs to be separately assembled in the air duct, which is not conducive to improving the assembly efficiency of the floor-standing air conditioner indoor unit, and thus not conducive to reducing the production cost of the floor-standing air conditioner indoor unit. Summary of the Invention

[0003] The main object of the present invention is to provide a floor-standing air conditioner indoor unit, aiming to solve the problem that the production cost of the conventional floor-standing air conditioner indoor unit is high due to low assembly efficiency.

[0004] To achieve the above object, the floor-standing air conditioner indoor unit proposed by the present invention includes:

[0005] A housing, which forms an air inlet and a first air outlet, and the air flow path from the air inlet to the first air outlet is the first air flow path;

[0006] An air duct assembly, which is disposed inside the housing, and the air duct assembly includes an air wheel, and the air wheel is located on the first air flow path; and

[0007] A switch door assembly, which includes a switch door and a protective door;

[0008] Wherein, the switch door is slidably disposed at the first air outlet to open or close the first air outlet;

[0009] The protective door is linked with the switch door, so that when the first air outlet is in an open state, the protective door is located on the first air flow path. The protective door is provided with a hollow area for air flow to pass through, and when the protective door is located on the first air flow path, the protective door is located downstream of the air wheel.

[0010] In one embodiment, when the first air outlet is in an open state and the protective door is located on the first air flow path, the side surface of the switch door close to the first air outlet is aligned with the inner wall surface of the first air outlet close to the switch door.

[0011] In one embodiment, when the first air outlet is in a closed state, the protective door is located outside the first air flow path.

[0012] In one embodiment, the switch door includes a connection side located on the sliding path of the switch door, and the protective door is connected to the connection side.

[0013] In one embodiment, the protective door is directly connected to the switch door so that the protective door and the switch door slide synchronously.

[0014] In one embodiment, the housing has a receiving cavity, the air duct assembly further includes an air duct, the air impeller is disposed in the air duct, one end of the air duct communicates with the receiving cavity, and the other end communicates with the air inlet;

[0015] The first air outlet communicates with the receiving cavity, and both the switch door and the protective door slide along the circumference of the receiving cavity. When the first air outlet is in an open state, the protective door is located at one end of the air duct away from the air inlet.

[0016] In one embodiment, the outer side surface of the protective door and the outer side surface of the switch door are both partial outer side surfaces of the same cylinder, and the receiving cavity has an arc-shaped inner wall surface matching the outer side surface of the protective door and the outer side surface of the switch door.

[0017] In one embodiment, the floor-standing air conditioner indoor unit further includes a first air guiding assembly, the first air guiding assembly is disposed in the receiving cavity and located on the first air flow path, and when the protective door is located on the first air flow path, the first air guiding assembly is located downstream of the protective door.

[0018] In one embodiment, the housing further forms a second air outlet, the second air outlet communicates with the receiving cavity, the air flow path from the air inlet to the second air outlet is a second air flow path, the second air flow path and the first air flow path have a common area, and both the air impeller and the first air guiding assembly are located in the common area;

[0019] When the first air outlet is in a closed state, the protective door is located on the second air flow path, and both the air impeller and the first air guiding assembly are located upstream of the protective door.

[0020] In one embodiment, the housing further forms a second air outlet, the air flow path from the air inlet to the second air outlet is a second air flow path, and when the first air outlet is in a closed state, the protective door is located on the second air flow path.

[0021] In one embodiment, when the first air outlet is in a closed state, the protective door is located at the second air outlet.

[0022] In one embodiment, the floor-standing air conditioner indoor unit further includes a second air guiding assembly, which is located on the second air flow path, and when the protective door is on the second air flow path, the second air guiding assembly is located upstream or downstream of the protective door.

[0023] In one embodiment, the housing is provided with an enclosing portion, which is located outside the second air outlet. The enclosing portion includes an enclosing plate located on the second air flow path, and the enclosing plate is provided with a plurality of micro through holes, and the aperture of the micro through holes is 2-8 mm.

[0024] In the above-mentioned floor-standing air conditioner indoor unit, the switch door can close the first air outlet, so as to effectively protect the components inside the housing. The switch door can open the first air outlet, so that the air flow can blow towards the room along the first air flow path, thereby adjusting the room temperature. While the first air outlet is in an open state, the protective door is on the first air flow path, so that the protective door can be used to prevent a human hand from reaching into the impeller through the first air outlet, resulting in injury, and can also prevent foreign objects from flying into the impeller through the first air outlet, resulting in damage to the impeller. In the above-mentioned floor-standing air conditioner indoor unit, by linking the protective door with the switch door, an effective protection effect can be achieved without the need to additionally assemble a protective net, which is beneficial to improving the assembly efficiency of the floor-standing air conditioner indoor unit and reducing the production cost of the floor-standing air conditioner indoor unit. Moreover, the protective door has a hollow area for the air flow to pass through. During the process of the air flow flowing through the hollow area of the protective door towards the first air outlet, the hollow area can disperse the air flow, making the air flow flowing out from the first air outlet softer, giving users a feeling of weak air flow or even no air flow, and having better comfort. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0026] Figure 1 It is a three-dimensional structural schematic diagram of the floor-standing air conditioner indoor unit according to an embodiment of the present invention when the first air outlet is in a closed state;

[0027] Figure 2 It is Figure 1 a top view schematic diagram of

[0028] Figure 3Schematic three-dimensional structure diagram of a floor-standing air conditioner indoor unit according to an embodiment of the present invention when the first air outlet is in an open state;

[0029] Figure 4 For Figure 3 Top view schematic diagram;

[0030] Figure 5 For Figure 1 Another perspective three-dimensional structure diagram of the floor-standing air conditioner indoor unit shown when the first air outlet is in a closed state.

[0031] Explanation of reference numerals in the drawings:

[0032]

[0033] The realization of the object of the present invention, functional features and advantages will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0036] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0037] The present invention provides a floor-standing air conditioner indoor unit.

[0038] In an embodiment of the present invention, as Figures 1-4 shown, the floor-standing air conditioner indoor unit 10 includes a housing 100, an air duct assembly 200, and a switch door assembly 300.

[0039] In this embodiment, the housing 100 is formed with an air inlet 110 and a first air outlet 120, and the air flow path from the air inlet 110 to the first air outlet 120 is the first air flow path 10a. Air can enter the housing 100 through the air inlet 110 and blow into the room from the first air outlet 120, that is, the air can blow into the room along the first air flow path 10a, thereby adjusting the temperature of the room.

[0040] The air duct assembly 200 is disposed inside the housing 100. The air duct assembly 200 includes a wind wheel 210, and the wind wheel 210 is located on the first air flow path 10a.

[0041] The switch door assembly 300 includes a switch door 310 and a protection door 320. The switch door 310 is slidably disposed at the first air outlet 120 to open or close the first air outlet 120. The protection door 320 is linked with the switch door 310 so that when the first air outlet 120 is in an open state, the protection door 320 is located on the first air flow path 10a. Among them, the protection door 320 is provided with a hollow area 322 for air to pass through, and when the protection door 320 is located on the first air flow path 10a, the protection door 320 is located downstream of the wind wheel 210.

[0042] It should be noted that in this embodiment, upstream and downstream are referenced to the air flow path. On the air flow path, when the air first reaches the first object and then reaches the second object, for the first object, the second object is located downstream of the first object, and for the second object, the first object is located upstream of the second object. Specifically, in this embodiment, the protection door 320 being located downstream of the wind wheel 210 means that the air flowing in from the air inlet 110 first passes through the wind wheel 210 and then reaches the protection door 320.

[0043] In the above floor-standing air conditioner indoor unit 10, the switch door 310 can close the first air outlet 120, thereby effectively protecting the components inside the cabinet 100. The switch door 310 can open the first air outlet 120, so that the air flow can blow towards the room along the first air flow path 10a, thereby adjusting the room temperature. While the first air outlet 120 is in the open state, the protection door 320 is located on the first air flow path 10a. Thus, the protection door 320 can be used to prevent a person's hand from touching the impeller 210 through the first air outlet 120 and causing injury, and can also prevent foreign objects from flying into the first air outlet 120 and damaging the impeller 210. That is, the protection door 320 can replace the protection net in a conventional floor-standing air conditioner indoor unit. Since the conventional protection net needs to be separately assembled on the air flow path, it is not conducive to improving the assembly efficiency of the floor-standing air conditioner indoor unit, and thus not conducive to reducing the production cost of the floor-standing air conditioner indoor unit. In the above floor-standing air conditioner indoor unit 10, by linking the protection door 320 with the switch door 310, an effective protection effect can be achieved without the need for additional assembly of a protection net, which is conducive to improving the assembly efficiency of the floor-standing air conditioner indoor unit 10 and reducing the production cost of the floor-standing air conditioner indoor unit 10.

[0044] Moreover, the protection door 320 has a hollow area 322 for the air flow to pass through. During the process of the air flow passing through the hollow area 322 of the protection door 320 and flowing towards the first air outlet 120, the hollow area 322 can disperse the air flow, making the air flow flowing out from the first air outlet 120 softer, giving users a feeling of weak air flow or even no air flow, and having better comfort.

[0045] In this embodiment, the first air outlet 120 being in the closed state means that the first air outlet 120 is in a substantially completely closed state. As Figure 1 and Figure 2 shown, Figure 1 and Figure 2 schematically show the floor-standing air conditioner indoor unit 10 with the first air outlet 120 substantially completely closed.

[0046] The switch door 310 can completely open the first air outlet 120 or partially open the first air outlet 120 as long as the air flow can flow out. In one embodiment, the first air outlet 120 being in the open state means that the first air outlet 120 is in a substantially completely open state. As Figure 3 and Figure 4 shown, Figure 3 and Figure 4 schematically show the floor-standing air conditioner indoor unit 10 with the switch door 310 substantially completely open. In one embodiment, the first air outlet 120 being in the open state can also mean that the first air outlet 120 is in a partially open state.

[0047] It should be noted that the specific implementation of the sliding opening and closing of the switch door 310 for the first air outlet 120 is a prior art and will not be described in detail here.

[0048] In this embodiment, the linkage between the protection door 320 and the switch door 310 means that the switch door 310 can drive the protection door 320 to move. In one embodiment, the switch door 310 includes a connection side 312 located on the sliding path of the switch door 310, and the protection door 320 is connected to the connection side 312. That is, the movement modes of both the protection door 320 and the switch door 310 are sliding. In this way, it is more convenient for the switch door 310 to drive the protection door 320 to move. In one embodiment, it is also possible that the movement mode of the switch door 310 is sliding, while the movement mode of the protection door 320 is linear lifting, and the existing technology for converting sliding (rotary sliding) movement into linear lifting movement can be used to achieve this, which will not be introduced in detail here.

[0049] In one embodiment, the protection door 320 and the switch door 310 slide synchronously, and the sliding distances of the protection door 320 and the switch door 310 are the same. At this time, the protection door 320 can be directly arranged on the switch door 310, that is, the protection door 320 is directly connected to the switch door 310. In this way, the structure of the switch door assembly 300 can be made simpler, and the positional relationship of the sliding movement is also easier to control.

[0050] In one embodiment, the protection door 320 and the switch door 310 slide asynchronously. At this time, the protection door 320 and the switch door 310 can be connected by a connecting rope, that is, the protection door 320 and the switch door 310 are indirectly connected. When the switch door 310 is in the closed state, there is a certain distance between the switch door 310 and the protection door 320; during the sliding process of the switch door 310, after the switch door 310 slides a certain distance, it contacts the protection door 320 and pushes the protection door 320 to slide.

[0051] In this embodiment, when the first air outlet 120 is in the open state and the protection door 320 is located on the first air flow path 10a, there are at least the following three situations.

[0052] The first situation is that when the first air outlet 120 is just completely opened, the protection door 320 is exactly located on the first air flow path 10a. At this time, the first air outlet 120 is in the fully open state, and the side surface of the switch door 310 close to the first air outlet 120 is substantially aligned with the inner wall surface of the first air outlet 120 close to the switch door 310. In this way, the structure of the switch door assembly 300 can be made simpler, and the positional relationship of the sliding movement is also easier to control.

[0053] In the second case, when the first air outlet 120 is partially opened (not fully opened), the protection door 320 is already located on the first air flow path 10a. At this time, the side of the switch door 310 close to the first air outlet 120 is located in the area of the first air outlet 120.

[0054] In the third case, when the first air outlet 120 is in a fully opened state, the protection door 320 has not yet reached the first air flow path 10a, and the switch door 310 and the protection door 320 need to continue to move. When the protection door 320 reaches the first air flow path 10a, there is a gap between the side of the switch door 310 close to the first air outlet 120 and the inner wall surface of the first air outlet 120 close to the switch door 310.

[0055] In this embodiment, the protection door 320 being located on the first air flow path 10a means that the protection door 320 is substantially completely located on the first air flow path 10a. The protection door 320 being substantially completely located on the first air flow path 10a means that the protection door 320 can cover most (more than 80%) of the air flow blown into the room through the first air flow path 10a.

[0056] In one embodiment, the protection door 320 is linked with the switch door 310 so that when the first air outlet 120 is in a closed state, the protection door 320 is located outside the first air flow path 10a. In this embodiment, the protection door 320 being located outside the first air flow path 10a means that the protection door 320 is completely located outside the first air flow path 10a. The protection door 320 being completely located outside the first air flow path 10a means that the protection door 320 can basically not cover (less than 20%) of the air flow blown into the room through the first air flow path 10a.

[0057] In one embodiment, when the first air outlet 120 is in a closed state, the protection door 320 can also be partially located on the first air flow path 10a. When the first air outlet 120 is in an open state, the protection door 320 can be completely located on the first air flow path 10a.

[0058] In this embodiment, the protection door 320 is a grid plate, and the grid of the grid plate is the hollow area 322 of the protection door 320. Among them, the grid plate includes a plurality of horizontal bars and vertical bars. The plurality of horizontal bars are arranged in parallel at intervals, the plurality of vertical bars are arranged in parallel at intervals, and each horizontal bar is orthogonal to the plurality of vertical bars.

[0059] More specifically, in this embodiment, the switch door 310 and the protection door 320 are integrally formed. In this way, it is more convenient to manufacture the switch door assembly 300.

[0060] More specifically, in this embodiment, the thickness of the switch door 310 is greater than the thickness of the protection door 320. In this way, it is possible to avoid the newly added protection door 320 occupying a large space, and also avoid the large weight of the newly added protection door 320, and it is also convenient to form the hollow area 322 of the protection door 320.

[0061] In this embodiment, the housing 100 has a receiving cavity 102. The air duct assembly 200 further includes an air duct 220, and the air wheel 210 is disposed in the air duct 220. One end of the air duct 220 communicates with the receiving cavity 102, and the other end communicates with the air inlet 110.

[0062] The first air outlet 120 communicates with the receiving cavity 102. Both the switch door 310 and the protection door 320 move along the circumferential direction of the receiving cavity 102. When the protection door 320 is located on the first air flow path 10a, that is, the protection door 320 is located at the end of the air duct 220 far from the air inlet 110, that is, the protection door 320 is located at the position where the receiving cavity 102 communicates with the air duct 303.

[0063] Separately providing the receiving cavity 102 and the air duct 220 is more convenient for the movement of the switch door 310 and the protection door 320, and is also convenient for determining the position of the protection door 320 on the first air flow path 10a.

[0064] Specifically, in this embodiment, the outer side surface of the protection door 320 and the outer side surface of the switch door 310 are both partial outer side surfaces of the same cylinder. That is, there is no height difference between the outer side surface of the protection door 320 and the outer side surface of the switch door 310. In this way, it is more conducive to the linkage sliding of the protection door 320 and the switch door 310. Preferably, the outer side surface of the protection door 320 and the outer side surface of the switch door 310 are connected to form a complete arc surface.

[0065] Correspondingly, in this embodiment, the receiving cavity 102 has an arc-shaped inner wall surface that matches the outer side surface of the protection door 320 and the outer side surface of the switch door 310. More specifically, in this embodiment, the receiving cavity 102 is generally cylindrical.

[0066] In this embodiment, the floor-standing air conditioner indoor unit 10 further includes a first air guiding assembly 400. The first air guiding assembly 400 is disposed in the receiving cavity 102 and is located on the first air flow path 10a. And when the protection door 320 is located on the first air flow path 10a, the first air guiding assembly 400 is located downstream of the protection door 320. Providing the first air guiding assembly 400 is conducive to adjusting the air outlet direction of the first air outlet 120.

[0067] In this embodiment, the housing 100 further forms a second air outlet 130. The air flow path from the air inlet 110 to the second air outlet 130 is the second air flow path 10b. When the first air outlet 120 is in the closed state, the protection door 320 is located on the second air flow path 10b.

[0068] The first air outlet 120 and the second air outlet 130 are set at the same time, so that the floor-standing air conditioner indoor unit 10 has multiple air supply modes. It can adopt the air supply mode of supplying air through the first air outlet 120 or the air supply mode of supplying air through the second air outlet 130. Moreover, when the air is supplied through the second air outlet 130, the protection door 320 is located on the second air flow path 10b. During the process that the air flow passes through the hollow area 322 of the protection door 320 and flows to the second air outlet 130, the hollow area 322 can disperse the air flow, making the air flow flowing out from the second air outlet 130 softer, giving users a feeling of weak air flow or even no air flow, and having better comfort.

[0069] In this embodiment, the second air outlet 130 is communicated with the accommodating cavity 102. The second air flow path 10b and the first air flow path 10a have a common area, and the air wheel 210 is located in the common area. When the protection door 320 is located on the second air flow path 10b, the protection door 320 is located downstream of the air wheel 210. At this time, the protection door 320 located on the second air flow path 10b, like the protection door 320 located on the first air flow path 10a, has a protection function.

[0070] In one embodiment, the first air guiding assembly 400 is located in the common area where the second air flow path 10b and the first air flow path 10a are located, so that the first air guiding assembly 400 can also facilitate the adjustment of the air outlet direction of the second air outlet 130. More specifically, in this embodiment, when the protection door 320 is located on the second air flow path 10b, it means that the protection door 320 is located at the second air outlet 130. When the protection door 320 is located on the second air flow path 10b, the first air guiding assembly 400 is located upstream of the protection door 320.

[0071] In one embodiment, the floor-standing air conditioner indoor unit 10 further includes a second air guiding assembly, and the second air guiding assembly is located on the second air flow path 10b. And when the protection door 320 is located on the second air flow path 10b, the second air guiding assembly is located upstream or downstream of the protection door 320. The second air guiding assembly is conducive to adjusting the air outlet direction of the second air outlet 130.

[0072] In this embodiment, the first air outlet 120 is the main air outlet, and the second air outlet 130 is the auxiliary air outlet. The air outlet area of the second air outlet 130 is smaller than that of the first air outlet 120. Under the same conditions (for example, when the power of the impeller 210 is the same), the air volume of the second air outlet 130 is smaller than that of the first air outlet 120. Specifically, in this embodiment, the air inlet 110 and the first air outlet 120 are located on opposite sides of the floor-standing air conditioner indoor unit 10, and the second air outlet 130 is located between the air inlet 110 and the first air outlet 120. That is, when the air inlet 110 is located at the rear of the floor-standing air conditioner indoor unit 10, the first air outlet 120 is located in front of the floor-standing air conditioner indoor unit 10, and the second air outlet 130 is located on the side of the floor-standing air conditioner indoor unit 10.

[0073] In this embodiment, as Figure 5 shown, the housing 100 is provided with a closing portion 140, and the closing portion 140 is located outside the second air outlet 130. The closing portion 140 includes a closing plate 142 located on the second air flow path 10b, and the closing plate 142 is provided with a plurality of micro through holes 1422. Among them, the aperture of the micro through holes 1422 is 2-8 mm. Preferably, the aperture of the micro through holes 1422 is 3-5 mm. Thus, when the air flow is discharged from the second air outlet 130 and then discharged through the micro through holes 1422 of the closing plate 142, the micro through holes 1422 can disperse the air flow, making the air flow flowing out of the closing plate 142 softer, giving the user a feeling of no wind, and having better comfort.

[0074] In this embodiment, the micro through holes 1422 are round holes, and the aperture of the micro through holes 1422 is the diameter of the round holes. In other embodiments, the micro through holes 1422 can also be polygonal holes such as triangular and quadrilateral. When the micro through holes 1422 are non-round holes, the equivalent aperture of the non-round holes is 2-8 mm.

[0075] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the description and drawings of the present invention under the inventive concept of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A floor-mounted air conditioner indoor unit, characterized in that, comprising: a housing formed with an air inlet and a first air outlet, and an air flow path from the air inlet to the first air outlet being a first air flow path; an air duct assembly disposed within the housing, the air duct assembly including a wind wheel located on the first air flow path; and a switch door assembly including a switch door and a protection door; wherein, the switch door is slidably disposed at the first air outlet to open or close the first air outlet; the protection door is linked with the switch door so that when the first air outlet is in an open state, the protection door is located on the first air flow path, the protection door is provided with a hollow area for air flow to pass through, and when the protection door is located on the first air flow path, the protection door is located downstream of the wind wheel; the housing has a receiving cavity, the air duct assembly further includes an air duct, the wind wheel is disposed within the air duct, one end of the air duct communicates with the receiving cavity, and the other end communicates with the air inlet; the first air outlet communicates with the receiving cavity, both the switch door and the protection door slide along the circumference of the receiving cavity, and when the first air outlet is in an open state, the protection door is located at one end of the air duct away from the air inlet; the outer side surface of the protection door and the outer side surface of the switch door are both partial outer side surfaces of the same cylinder, and the receiving cavity has an arc-shaped inner wall surface matching the outer side surface of the protection door and the outer side surface of the switch door; the switch door and the protection door are integrally formed.

2. The floor-mounted air conditioner indoor unit according to claim 1, characterized in that, when the first air outlet is in an open state and the protection door is located on the first air flow path, the side surface of the switch door close to the first air outlet is aligned with the inner wall surface of the first air outlet close to the switch door.

3. The floor-mounted air conditioner indoor unit according to claim 1, characterized in that, when the first air outlet is in a closed state, the protection door is located outside the first air flow path.

4. The floor-mounted air conditioner indoor unit according to claim 1, characterized in that, the switch door includes a connection side located on the sliding path of the switch door, and the protection door is connected to the connection side.

5. The floor-mounted air conditioner indoor unit according to claim 4, characterized in that, the protection door is directly connected to the switch door so that the protection door and the switch door slide synchronously.

6. The floor-mounted air conditioner indoor unit according to claim 1, characterized in that, the floor-mounted air conditioner indoor unit further includes a first air guiding assembly disposed within the receiving cavity, located on the first air flow path, and when the protection door is located on the first air flow path, the first air guiding assembly is located downstream of the protection door.

7. The floor-mounted air conditioner indoor unit according to claim 6, characterized in that, The casing further forms a second air outlet, the second air outlet communicates with the accommodating cavity, the air flow path from the air inlet to the second air outlet is a second air flow path, the second air flow path and the first air flow path have a common area, and the air impeller and the first air guiding component are both located in the common area; When the first air outlet is in a closed state, the protection door is located on the second air flow path, and the air impeller and the first air guiding component are both upstream of the protection door.

8. The floor-standing air conditioner indoor unit according to any one of claims 1-6, characterized in that, the casing further forms a second air outlet, the air flow path from the air inlet to the second air outlet is a second air flow path, and when the first air outlet is in a closed state, the protection door is located on the second air flow path.

9. The floor-standing air conditioner indoor unit according to claim 8, characterized in that, when the first air outlet is in a closed state, the protection door is located at the second air outlet.

10. The floor-standing air conditioner indoor unit according to claim 8, characterized in that, the floor-standing air conditioner indoor unit further includes a second air guiding component, the second air guiding component is located on the second air flow path, and when the protection door is located on the second air flow path, the second air guiding component is located upstream or downstream of the protection door.

11. The floor-standing air conditioner indoor unit according to claim 7, characterized in that, the casing is provided with a closing part, the closing part is located outside the second air outlet, the closing part includes a closing plate located on the second air flow path, and the closing plate is provided with a plurality of micro through holes, and the aperture of the micro through holes is 2-8 millimeters.

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