Cabinet type indoor unit of air conditioner

Abstract

The utility model provides a kind of cabinet type air conditioner indoor unit.The cabinet type air conditioner indoor unit includes shell, fan and air guide device.First inlet is equipped on shell;Fan is arranged in shell, and fan has second inlet communicated with first inlet.Air guide device includes air guide ring and air guide grille, and air guide ring is coaxially arranged at second inlet;Air guide ring has first edge away from second inlet and second edge close to second inlet.Air guide channel is formed in air guide ring, and air guide channel is tapered structure in the direction that first edge points to second edge.Air guide grille is arranged in air guide channel, and outer edge of air guide grille is connected at second edge;Air guide grille includes multiple air guide holes, and multiple air guide holes form honeycomb structure.The utility model solves the problem of large noise of existing cabinet type air conditioner.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning control technology, and in particular to a cabinet-type air conditioner indoor unit. Background Technology

[0002] As a typical temperature control device for large spaces (such as schools and offices), the core performance requirement for square cabinet air conditioners is to achieve efficient high-volume airflow output. However, the noise generated by high-volume operation has become a key factor restricting user experience. The main noise sources include flow-induced noise from the centrifugal fan and volute, as well as turbulence noise generated when airflow passes through the evaporator. To address these noise issues, related technologies employ passive noise reduction measures such as adding sound-absorbing pads to the air duct, optimizing the volute profile, and thinning the evaporator. However, the noise reduction effect of these passive methods is not very good. Utility Model Content

[0003] In view of the above problems, this utility model is proposed to provide a cabinet air conditioner indoor unit that overcomes or at least partially solves the above problems, and can solve the problem of high noise in existing cabinet air conditioners, thereby improving the user experience.

[0004] Specifically, this utility model provides a cabinet-type air conditioner indoor unit, comprising:

[0005] A housing, wherein a first inlet is provided;

[0006] A fan is disposed within the housing, and the fan has a second inlet communicating with the first inlet;

[0007] An air-guiding device includes an air-guiding ring and an air-guiding grid. The air-guiding ring is coaxially disposed at the second inlet. The air-guiding ring has a first edge away from the second inlet and a second edge close to the second inlet. An air-guiding channel is formed within the air-guiding ring, and the air-guiding channel has a tapering structure in the direction from the first edge to the second edge. The air-guiding grid is disposed within the air-guiding channel, and the outer edge of the air-guiding grid is connected to the second edge. The air-guiding grid includes a plurality of air-guiding holes, and the plurality of air-guiding holes form a honeycomb structure.

[0008] Optionally, the air intake grille has a curved structure, with the concave portion facing the second edge and the convex portion facing the first edge; or

[0009] The air intake grille has a planar structure.

[0010] Optionally, the air intake grille has a curved structure, and the protrusion of the curved structure passes through the air intake channel and extends to the outside of the first edge.

[0011] Optionally, the opening of each of the air inlet holes is a regular hexagonal structure;

[0012] The diameter of each of the aforementioned air inlets is 10 mm to 20 mm.

[0013] Optionally, the diameter of each of the air inlets is 14 mm to 16 mm.

[0014] Optionally, the induced draft device further includes:

[0015] A first connecting portion is disposed on the outer periphery of the first edge and extends radially along the air guide ring, the first connecting portion being configured to be fixedly connected to the end of the fan; and / or

[0016] A second connecting portion is disposed on one side of the air guide ring. The second connecting portion has an abutment portion configured to abut against the inner wall surface of the housing; and / or

[0017] The third connecting part is connected to the upper part of the first edge and extends along the axial direction of the air duct ring. The third connecting part is configured to be sleeved on the outer peripheral wall of the fan.

[0018] Optionally, the first inlet is located on the left and / or right side walls of the housing;

[0019] The air intake ring is spaced apart from the front side wall of the housing to form an air intake channel extending laterally along the housing at the front part inside the housing;

[0020] The air intake channel is connected to the first inlet through the air intake channel.

[0021] Optionally, the housing includes a front housing and a rear housing, wherein the front housing is detachably connected to the front opening of the rear housing;

[0022] The first inlet is located on the left side wall and / or right side wall of the front housing;

[0023] The fan is a centrifugal fan, which is installed inside the rear housing. The centrifugal fan includes a impeller, a volute, and a volute tongue. The impeller is installed inside the volute and extends axially in the front-rear direction. The second inlet is formed at the front end of the volute, and the front end of the volute is flush with the front opening of the rear housing. An air outlet cavity is formed inside the volute tongue and is located on the upper part of the volute. The rear end of the volute abuts against the rear sidewall of the rear housing.

[0024] Optionally, the fan is spaced apart from the bottom of the housing;

[0025] The housing also forms an air outlet channel and a first outlet, the air outlet channel being connected between the first outlet and the air outlet cavity;

[0026] The indoor unit of the cabinet air conditioner also includes an indoor heat exchanger, which is disposed in the air outlet duct and located above the volute tongue; the lower end of the indoor heat exchanger is connected to the front side of the volute tongue, and the upper end is connected to the rear side wall of the housing.

[0027] Optionally, the first outlet is located on the upper front side of the front housing;

[0028] The indoor unit of the cabinet-type air conditioner also includes:

[0029] A windbreak is provided around the front opening of the rear shell. The lower edge of the windbreak is connected to the upper part of the volute tongue, and the upper edge of the windbreak is not higher than the first outlet. The windbreak has a first windproof surface, and the distance between the first windproof surface and the rear sidewall of the rear shell decreases sequentially from bottom to top.

[0030] In the indoor unit of this cabinet-type air conditioner, an air-guiding device is provided at the inlet of the fan. This device includes an air-guiding ring and an air-guiding grille. The air-guiding ring has a tapered air-guiding channel, and the air-guiding grille is honeycomb-shaped. This invention significantly optimizes airflow organization through active fluid rectification technology using the tapered air-guiding channel and the honeycomb-shaped air-guiding grille, suppressing airflow noise at the source and improving energy efficiency. Specifically, the tapered air-guiding channel increases airflow velocity and reduces local resistance; the honeycomb-shaped air-guiding grille evenly divides the airflow to suppress vortex generation, thereby transforming turbulence into low-energy, low-noise laminar flow. Therefore, this invention not only improves fan efficiency and airflow uniformity but also reduces noise caused by airflow disturbance, enhancing user comfort. It achieves a 3-5 dB(A) sound pressure level reduction while maintaining the same airflow output; and it achieves low-noise operation while maintaining high airflow output, breaking through the limitations of traditional passive noise reduction on airflow and energy efficiency, and effectively solving the technical contradiction of the incompatibility between high airflow and low noise in cabinet-type air conditioners.

[0031] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0032] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0033] Figure 1This is a schematic structural diagram of a cabinet-type air conditioner indoor unit according to an embodiment of the present utility model;

[0034] Figure 2 This is a schematic partial structural diagram of a cabinet-type air conditioner indoor unit according to an embodiment of the present utility model (front casing not shown in the figure);

[0035] Figure 3 This is a schematic structural diagram of the air duct device in the indoor unit of a cabinet air conditioner according to an embodiment of the present invention;

[0036] Figure 4 This is a schematic structural diagram of the air duct device in the indoor unit of a cabinet air conditioner according to an embodiment of the present utility model;

[0037] Figure 5 This is a schematic structural diagram of the air duct ring of the air duct device in the indoor unit of a cabinet air conditioner according to an embodiment of the present invention. Detailed Implementation

[0038] The following reference Figures 1 to 5 This description pertains to a cabinet-type air conditioner indoor unit according to an embodiment of the present invention. In this description, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of the present invention, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0039] Unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," and "couple" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] Furthermore, in the description of this embodiment, "above" or "below" the second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. That is, in the description of this embodiment, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "below" of the second feature can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this embodiment, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] Figure 1 This is a schematic structural diagram of a cabinet-type air conditioner indoor unit according to an embodiment of the present invention, as shown below. Figure 1 As shown, and refer to Figures 2 to 5 This utility model provides a cabinet-type air conditioner indoor unit 10, which includes a housing 100, a fan 200, and an air-exhausting device 300. The housing 100 has a first inlet 110; the fan 200 is disposed within the housing 100 and has a second inlet communicating with the first inlet 110. The air-exhausting device 300 includes an air-exhausting ring 310 and an air-exhausting grille 320. The air-exhausting ring 310 is coaxially disposed at the second inlet; the air-exhausting ring 310 has a first edge 311 facing away from the second inlet and a second edge 312 close to the second inlet. An air-exhausting channel is formed within the air-exhausting ring 310, and the air-exhausting channel has a gradually narrowing structure in the direction from the first edge 311 to the second edge 312. That is, the inner wall of the air-exhausting ring 310 constitutes the channel wall of the air-exhausting channel; in the direction of airflow, the cross-section of the air-exhausting ring 310 gradually decreases. An air-guiding grille 320 is disposed within an air-guiding channel, and the outer edge of the air-guiding grille 320 is connected to a second edge 312. The air-guiding grille 320 includes a plurality of air-guiding holes 321, which form a honeycomb structure. Specifically, the plurality of air-guiding holes 321 are evenly distributed, and the air-guiding grille 320 is configured to cause the airflow passing through it to form laminar flow.

[0043] When the indoor unit 10 of the cabinet air conditioner in this embodiment is running, outside air first enters through the first inlet 110 on the casing 100. The negative pressure generated by the fan 200 draws the airflow into the air intake ring 310 of the air intake device 300. Since the air intake channel has a gradually narrowing structure along the direction from the first edge 311 to the second edge 312, the airflow is gradually compressed and accelerated during the flow. When the airflow passes through the air intake grille 320, its honeycomb-shaped distribution of multiple air intake holes 321 divides the airflow into multiple fine streams, and guides the airflow direction through the uniformly distributed channel structure, transforming the originally turbulent airflow into laminar flow. Finally, the laminarized airflow is uniformly and stably delivered into the fan 200 through the second inlet of the fan 200.

[0044] In this embodiment, the active fluid rectification technology of the tapered air intake channel and the honeycomb air intake grille 320 significantly optimizes the airflow organization, suppressing airflow noise at the source and improving energy efficiency. Specifically, the tapered air intake channel increases airflow velocity and reduces local resistance; the honeycomb air intake grille 320 uniformly divides the airflow to suppress vortex generation, thereby transforming turbulence into low-energy, low-noise laminar flow. This embodiment not only improves the efficiency and airflow uniformity of the fan 200, but also reduces noise caused by airflow disturbance, enhancing user comfort; it can achieve a sound pressure level reduction of 3-5 dB(A) while maintaining the same airflow output. Therefore, this embodiment achieves low-noise operation while maintaining a large airflow output, breaking through the limitations of traditional passive noise reduction on airflow and energy efficiency, and effectively solving the technical contradiction of the incompatibility between high airflow and low noise in cabinet air conditioners.

[0045] Furthermore, the active noise reduction technology of this embodiment can replace existing passive noise reduction technology, or it can be used together with existing passive noise reduction technology.

[0046] like Figure 4 As shown, in some embodiments of this utility model, the air intake grille 320 has a planar structure.

[0047] like Figure 3 As shown, in some embodiments of this utility model, the air intake grille 320 has a curved structure, with the concave part of the curved structure facing the second edge 312 and the convex part facing the first edge 311.

[0048] Compared with the planar structure of the air intake grille 320, the curved structure of the air intake grille 320 in this embodiment can guide the airflow more smoothly, further reduce flow resistance and eddies; reduce the noise generated by the collision between the airflow and the air intake hole 321; enhance the laminar flow effect and synergistically reduce noise.

[0049] like Figure 3As shown, in some embodiments of this utility model, the air intake grille 320 has a curved surface structure, with the protrusions of the curved surface structure passing through the air intake channel and extending to the outside of the first edge 311. This embodiment, by extending the curved protrusions of the air intake grille 320 to the outside of the first edge 311, expands the range of the air intake grille 320's intervention on the upstream flow field, pre-rectifies the airflow before it enters the air intake channel, which is beneficial for improving laminar flow conversion efficiency and thus further reducing noise.

[0050] In some embodiments of this utility model, the opening of each air vent 321 is a circular structure.

[0051] In some embodiments of this utility model, the opening of each air vent 321 is a square structure.

[0052] like Figure 4 As shown, in some embodiments of this utility model, the opening of each air vent 321 is a regular hexagonal structure.

[0053] Specifically, compared to circular and square orifices, hexagonal orifices offer the following advantages: the streamlined edges (120° interior angles) of a hexagon fall between those of a circle (no sharp corners) and a square (right angles), reducing the right-angle vortices of a square orifice while retaining the airflow guidance properties of a polygon. Furthermore, the hexagon's honeycomb-like, tightly packed arrangement significantly increases ventilation per unit area.

[0054] In some embodiments of this utility model, the diameter of each air vent 321 is 10mm to 20mm.

[0055] In some embodiments of this utility model, the diameter of each air vent 321 is 14mm to 16mm.

[0056] Specifically, the diameter of a regular hexagon refers to the longest line segment that passes through the center of the regular hexagon and connects two opposite vertices. The "diameter" of a regular hexagon is equal to twice the side length.

[0057] To better illustrate the influence of the structure of the air intake hole 321 and the shape of the air intake grille 320 on the noise reduction effect of the air intake device 300, simulation experiments were conducted on the air volume-noise characteristics of four different air intake device 300 schemes (as shown in Table 1) and the comparative air intake ring 310.

[0058] Table 1. Exhaust fan devices for the four schemes

[0059] plan Diameter of the hexagonal air intake Structure of the air intake grille Option 1 20mm curved structure Option 2 15mm curved structure Option 3 10mm curved structure Option 4 15mm planar structure

[0060] By constructing a standardized testing environment, airflow parameters and sound pressure level data of two sets of samples under equivalent operating conditions were obtained. The experimental data were fitted to obtain characteristic curves (airflow-noise fitting graph). Comparing the noise test results of the air intake devices in schemes one, two, and three, it can be seen that scheme two has the best noise reduction effect; comparing the noise test results of schemes two and four, it can be seen that scheme two has a better noise reduction effect. Furthermore, the experimental data shows that the air intake device 300 in scheme two reduces noise by approximately 0.9 decibels compared to the comparative air intake ring 310 (the comparative does not include the air intake grille 320) under the same airflow.

[0061] like Figure 3 and Figure 4 As shown, in some embodiments of the present invention, the air-guiding device 300 further includes at least one of a first connecting portion 330, a second connecting portion 340, and a third connecting portion 350. Preferably, the air-guiding device 300 further includes a first connecting portion 330, a second connecting portion 340, and a third connecting portion 350.

[0062] The first connecting portion 330 is disposed on the outer periphery of the first edge 311 and extends radially along the air intake ring 310. The first connecting portion 330 is configured to be fixedly connected to the end of the fan 200. Specifically, the first connecting portion 330 and the end of the fan 200 can be fixedly connected by screws or snap-fit. The second connecting portion 340 is disposed on one side of the air intake ring 310 and has an abutment portion configured to abut against the inner wall surface of the housing 100. The third connecting portion 350 is connected to the upper part of the first edge 311 and extends axially along the air intake ring 310. The third connecting portion 350 is configured to be sleeved on the outer peripheral wall of the fan 200.

[0063] In this embodiment, the coordinated design of the first connecting part 330, the second connecting part 340, and the third connecting part 350 achieves multi-dimensional stable connection and flow field optimization between the induced draft device 300, the fan 200, and the housing 100. Specifically, the first connecting part 330, by extending radially along the induced draft ring 310 and rigidly locking with the end of the fan 200, eliminates radial vibration offset of the induced draft device 300 when the fan 200 rotates at high speed, avoiding low-frequency abnormal noise caused by resonance, while ensuring the coaxiality between the induced draft channel and the fan 200 impeller, maintaining airflow compression efficiency. The abutment portion of the second connecting part 340 forms a surface contact support with the inner wall of the housing 100, suppressing airflow leakage at the gap between the fan 200 volute 210 and the housing 100. The third connecting part 350 forms a sleeve structure with the outer peripheral wall of the fan 200, further ensuring the installation stability of the induced draft device 300.

[0064] In some embodiments of this utility model, the first inlet 110 is located on the front or rear side of the housing 100.

[0065] like Figure 1As shown, in some embodiments of this utility model, the first inlet 110 is located on the left or right side wall of the housing 100. The air intake ring 310 is spaced apart from the front side wall of the housing 100 to form an air intake channel extending laterally along the front of the housing 100. The lateral direction of the housing is left to right. The air intake channel communicates with the first inlet 110 through the air intake channel. On the one hand, compared to a configuration where the air intake channel and the air intake channel are perpendicular to each other, in this embodiment, the laterally extending air intake channel and the air intake channel form an "L-shaped" flow channel, which can reduce the noise generated by the airflow colliding with the inlet of the air intake ring 310. On the other hand, the first inlet 110 is located on the side of the housing 100, which facilitates the installation of the air conditioner.

[0066] In some alternative embodiments, the housing 100 has a first inlet 110 on both the left and right side walls, and the two first inlets 110 are symmetrically arranged. Compared with the above embodiment where only one side has a first inlet 110, this embodiment can increase the effective air intake area by providing first inlets 110 on both sides, thereby improving the air supply efficiency of the air conditioner.

[0067] like Figure 1 and Figure 2 As shown, in some embodiments of this utility model, the housing 100 includes a front housing 130 and a rear housing 140, with the front housing 130 detachably connected to the front opening of the rear housing 140. A first inlet 110 is disposed on the left side wall and / or right side wall of the front housing 130. The fan 200 is a centrifugal fan 200, installed inside the rear housing 140. The centrifugal fan 200 includes an impeller, a volute 210, and a volute tongue 220. The impeller is installed inside the volute 210, and its axial direction extends along the front-rear direction of the housing 100. A second inlet is formed at the front end of the volute 210, which is flush with the front opening of the rear housing 140. An air outlet cavity is formed within the volute tongue 220, located at the upper part of the volute 210. The rear end of the volute 210 abuts against the rear side wall of the rear housing 140. Specifically, the fan 200 and the first inlet 110 are both located at the lower part of the housing 100. In this embodiment, the removable front housing 130 facilitates the maintenance and cleaning of the indoor unit of the air conditioner. The front end of the volute 210 is flush with the front opening of the rear housing 140, and the rear end of the volute 210 abuts against the rear sidewall of the rear housing 140, which facilitates the positioning of the volute 210 and improves the assembly efficiency of the volute 210.

[0068] like Figure 2 As shown, in some embodiments of this utility model, the fan 200 and the bottom of the housing 100 are spaced apart. In this embodiment, the spaced-apart arrangement between the fan 200 and the bottom of the housing 100 can block the transmission of high-frequency vibration of the fan 200 to the housing 100, effectively suppressing structural noise radiation; it can also accelerate the airflow circulation for motor heat dissipation, extending the service life of the motor; and it also facilitates the quick assembly and disassembly of the fan 200 module.

[0069] like Figure 2 As shown, in some embodiments of this utility model, the housing 100 further forms an air outlet channel and a first outlet 120, with the air outlet channel connecting the first outlet 120 and the air outlet cavity. The cabinet-type air conditioner indoor unit 10 also includes an indoor heat exchanger 500, which is disposed in the air outlet channel and located above the volute 220; the lower end of the indoor heat exchanger 500 is connected to the front side of the volute 220, and the upper end is connected to the rear side wall of the housing 100, which can improve the installation stability of the indoor heat exchanger 500.

[0070] In this embodiment, air enters through the first inlet 110, passes through the induced draft device 300 and the centrifugal fan 200, and then enters the outlet duct. Next, the airflow flows through the outlet duct to the first outlet 120, undergoing heat exchange via the indoor heat exchanger 500. The indoor heat exchanger 500 is angled to facilitate even airflow and improve heat exchange efficiency.

[0071] like Figure 1 As shown, in some embodiments of this utility model, the first outlet 120 is located on the upper front side of the front shell 130.

[0072] like Figure 2 As shown, in some embodiments of this utility model, the indoor unit 10 of the cabinet air conditioner further includes a wind deflector 400, which surrounds the front opening of the rear shell 140. The lower edge of the wind deflector 400 is connected to the upper part of the volute tongue 220, and the upper edge of the wind deflector 400 is not higher than the first outlet 120. The wind deflector 400 has a first wind deflector surface 410, and the distance between the first wind deflector surface 410 and the rear side wall of the rear shell 140 decreases sequentially from bottom to top.

[0073] In this embodiment, the distance between the first windbreak surface 410 and the rear sidewall gradually decreases, forming a narrowing channel that helps accelerate airflow, reduce turbulence, and thus lower noise. Simultaneously, the windbreak portion 400 ensures smooth airflow from the air outlet cavity to the first outlet 120, preventing airflow diffusion or backflow and improving air delivery efficiency.

[0074] In some embodiments of this utility model, the windbreak part 400 further includes a second windbreak surface and a third windbreak surface, which are disposed on the left and right sides of the first windbreak surface 410.

[0075] In some embodiments of this example, the indoor unit of the cabinet air conditioner is a square cabinet air conditioner indoor unit.

[0076] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A cabinet-type air conditioner indoor unit, characterized in that, include: A housing, wherein a first inlet is provided; A fan is disposed within the housing, and the fan has a second inlet communicating with the first inlet; An air-guiding device includes an air-guiding ring and an air-guiding grid. The air-guiding ring is coaxially disposed at the second inlet. The air-guiding ring has a first edge away from the second inlet and a second edge close to the second inlet. An air-guiding channel is formed within the air-guiding ring, and the air-guiding channel has a tapering structure in the direction from the first edge to the second edge. The air-guiding grid is disposed within the air-guiding channel, and the outer edge of the air-guiding grid is connected to the second edge. The air-guiding grid includes a plurality of air-guiding holes, and the plurality of air-guiding holes form a honeycomb structure.

2. The cabinet-type air conditioner indoor unit according to claim 1, characterized in that, The air intake grille has a curved structure, with the concave portion facing the second edge and the convex portion facing the first edge; or The air intake grille has a planar structure.

3. The cabinet-type air conditioner indoor unit according to claim 1, characterized in that, The air intake grille has a curved structure, and the protrusion of the curved structure passes through the air intake channel and extends to the outside of the first edge.

4. The cabinet-type air conditioner indoor unit according to claim 1, characterized in that, The opening of each of the air intake holes is a regular hexagonal structure; The diameter of each of the aforementioned air inlets is 10 mm to 20 mm.

5. The cabinet-type air conditioner indoor unit according to claim 4, characterized in that, The diameter of each of the air inlets is 14 mm to 16 mm.

6. The cabinet-type air conditioner indoor unit according to claim 1, characterized in that, The air extraction device also includes: A first connecting portion is disposed on the outer periphery of the first edge and extends radially along the air guide ring, the first connecting portion being configured to be fixedly connected to the end of the fan; and / or A second connecting portion is disposed on one side of the air guide ring. The second connecting portion has an abutment portion configured to abut against the inner wall surface of the housing; and / or The third connecting part is connected to the upper part of the first edge and extends along the axial direction of the air duct ring. The third connecting part is configured to be sleeved on the outer peripheral wall of the fan.

7. The cabinet-type air conditioner indoor unit according to claim 1, characterized in that, The first inlet is located on the left and / or right side walls of the housing; The air intake ring is spaced apart from the front side wall of the housing to form an air intake channel extending laterally along the housing at the front part inside the housing; The air intake channel is connected to the first inlet through the air intake channel.

8. The cabinet-type air conditioner indoor unit according to claim 7, characterized in that, The housing includes a front housing and a rear housing, wherein the front housing is detachably connected to the front opening of the rear housing; The first inlet is located on the left side wall and / or right side wall of the front housing; The fan is a centrifugal fan, which is installed inside the rear housing. The centrifugal fan includes a impeller, a volute, and a volute tongue. The impeller is installed inside the volute and extends axially in the front-rear direction. The second inlet is formed at the front end of the volute, and the front end of the volute is flush with the front opening of the rear housing. An air outlet cavity is formed inside the volute tongue and is located on the upper part of the volute. The rear end of the volute abuts against the rear sidewall of the rear housing.

9. The cabinet-type air conditioner indoor unit according to claim 8, characterized in that, The fan is spaced apart from the bottom of the casing; The housing also forms an air outlet channel and a first outlet, the air outlet channel being connected between the first outlet and the air outlet cavity; The indoor unit of the cabinet air conditioner also includes an indoor heat exchanger, which is disposed in the air outlet duct and located above the volute tongue; the lower end of the indoor heat exchanger is connected to the front side of the volute tongue, and the upper end is connected to the rear side wall of the housing.

10. The cabinet-type air conditioner indoor unit according to claim 9, characterized in that, The first outlet is located on the upper front side of the front housing; The indoor unit of the cabinet-type air conditioner also includes: A windbreak is provided around the front opening of the rear shell. The lower edge of the windbreak is connected to the upper part of the volute tongue, and the upper edge of the windbreak is not higher than the first outlet. The windbreak has a first windproof surface, and the distance between the first windproof surface and the rear sidewall of the rear shell decreases sequentially from bottom to top.

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