Centrifugal fan and mobile air conditioner

Abstract

This utility model relates to the field of air conditioning technology, specifically providing a centrifugal fan and a portable air conditioner, aiming to address the problem of poor comfort caused by condensation in the outlet airflow. To this end, the centrifugal fan of this utility model includes: a volute, comprising an arc-shaped main body section and a first extension section, the arc-shaped main body section defining a cavity capable of accommodating a centrifugal impeller, and the first extension section connected to a first end of the arc-shaped main body section; a volute tongue, comprising an arc-shaped transition section and a second extension section, the arc-shaped transition section connected to a second end of the arc-shaped main body section and defining an airflow outlet between it and the first extension section, the second extension section connected to the arc-shaped transition section and extending away from the first extension section along a first direction; and a plurality of intersecting first and second partition ribs, protruding from the outer surface of the second extension section. This solution can avoid the problem of large-area condensation at the airflow outlet of the centrifugal fan, improving the comfort of the outlet airflow.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, specifically providing a centrifugal fan and a portable air conditioner. Background Technology

[0002] Currently, both wall-mounted and floor-standing air conditioners need to be fixed in a limited location and cannot be moved. Therefore, portable air conditioners have emerged. Portable air conditioners mainly consist of a casing, an indoor airflow assembly, and an outdoor airflow assembly. The indoor and outdoor airflow assemblies are both housed within the casing. The casing has indoor air inlets and outlets corresponding to the indoor airflow assembly, and it also has outdoor air inlets and outlets corresponding to the outdoor airflow assembly.

[0003] In portable air conditioners using related technologies, the front panel of the outer casing has an indoor air outlet corresponding to the indoor heat exchange chamber, and an indoor fan is installed inside the indoor chamber. The fan outlet of the indoor fan connects to the indoor air outlet. This allows temperature-regulated air to be delivered into the room through the indoor air outlet. However, when the portable air conditioner is in cooling mode, condensation easily forms on components around the fan outlet, especially the indoor fan, due to the temperature difference between the components and the air. This condensation is easily blown into the room with the air, and even onto the user, resulting in poor airflow comfort from the portable air conditioner. Utility Model Content

[0004] The present invention aims to solve the above-mentioned technical problem, namely, to solve the problem of poor comfort caused by the airflow of portable air conditioners carrying condensed water.

[0005] In a first aspect, this utility model provides a centrifugal fan, comprising: a volute, including an arc-shaped main body section and a first extension section, the arc-shaped main body section defining a receiving cavity capable of accommodating a centrifugal impeller, the first extension section being connected to a first end of the arc-shaped main body section; a volute tongue, including an arc-shaped transition section and a second extension section, the arc-shaped transition section being connected to a second end of the arc-shaped main body section and defining an airflow outlet between the transition section and the first extension section, the second extension section being connected to the transition section and extending away from the first extension section along a first direction; and a plurality of first partition ribs and a plurality of second partition ribs intersecting and arranged protruding from the outer surface of the second extension section; wherein, the first direction is the width direction of the airflow outlet.

[0006] When the above technical solution is adopted, the outer surface of the second extension section can be divided into multiple small planes by the first and second partition ribs provided on it. In this way, when the portable air conditioner is in cooling mode, the air after passing through the indoor heat exchanger is low-temperature air. When this low-temperature air passes through the centrifugal fan, the multiple small planes prevent the formation of large areas of condensation on the surface of the second extension section. Therefore, large droplets of condensate can be reduced or even avoided from being blown out with the airflow through the outlet, thereby improving the comfort of the airflow. Furthermore, due to the provision of the first and second partition ribs, when a small amount of condensate is generated, it can be guided to flow along the extension direction of the first or second partition rib, preventing condensate from accumulating locally and dripping.

[0007] In the optional embodiment of the centrifugal fan described above, it further includes: a third partition rib extending along a second direction and protruding at the connection between the second extension section and the arc-shaped transition section, wherein the third partition rib can be cross-connected with the first partition rib and / or the second partition rib; wherein the second direction is the length direction of the airflow outlet.

[0008] The addition of the third dividing rib not only enhances the structural strength at the connection between the second extension section and the arc-shaped transition section, preventing deformation due to uneven stress, but also prevents condensate from flowing towards the airflow outlet. Furthermore, the third dividing rib intersects with the first and / or second dividing ribs, forming a more stable grid structure that better guides the flow direction of condensate.

[0009] In the optional embodiment of the centrifugal fan described above, it further includes: a peripheral portion extending in a direction away from the volute, comprising a first peripheral portion and a second peripheral portion joined end to end, the first peripheral portion being arranged circumferentially around the second extended portion, and the second peripheral portion being arranged around the airflow outlet and fixedly connected to the arc-shaped main body segment; the first peripheral portion having a first segment and a second segment arranged opposite to each other in the second direction, the first segment and the second segment both extending along the first direction and distributed vertically; and a water passage hole formed at the bend connection between the second segment and the second extended portion.

[0010] The peripheral design protects the second extension section and the air outlet from damage caused by external objects. Furthermore, the connection between the peripheral section and the volute and arc-shaped main body section ensures the stability and sealing of the overall centrifugal fan structure, reducing leakage and improving its efficiency. The first and second sections are arranged vertically, and the water passage holes at the bend between the second section and the second extension section allow condensate flowing down the surface of the second extension section to drain smoothly, preventing condensate buildup at the peripheral section.

[0011] In an optional embodiment of the centrifugal fan described above, the second section extends inclinedly from the outside inward and away from the first section.

[0012] By extending the second section at such an angle, condensate can flow more easily into the drain hole under the influence of gravity, accelerating drainage and further preventing condensate from accumulating on the second section. Furthermore, by guiding condensate more accurately into the drain hole, the risk of condensate flowing everywhere and potentially causing moisture or damage to other parts is reduced, thus improving safety.

[0013] In the optional embodiment of the centrifugal fan described above, it further includes: an air outlet guard net disposed at the airflow outlet, the air outlet guard net comprising a frame, fixed mesh wires and air outlet mesh wires, the fixed mesh wires being connected to the outer periphery of the frame and extending along the second direction, and the air outlet mesh wires being fixed inside the frame; wherein, the second periphery has a third segment and a fourth segment arranged opposite to each other in the second direction, the third segment and the fourth segment both extending along the first direction and having fixed holes, the fixed mesh wires being able to be inserted into the fixed holes.

[0014] The outlet mesh effectively prevents foreign objects from entering the centrifugal fan, avoiding damage to internal components and ensuring its normal operation. By inserting the fixing mesh into the fixing holes in the third and fourth sections, the outlet mesh can be stably installed, ensuring it will not loosen or shift during centrifugal fan operation.

[0015] In an optional embodiment of the centrifugal fan described above, a portion of the plate of the third section is recessed away from the second section to form a recessed portion, and the fixing hole is formed at the bottom of the recessed portion.

[0016] By setting the recessed part and arranging the fixing hole at the bottom of the recessed part, not only can the air outlet guard be fixed, but also when condensate flows along the third section, the condensate can be collected in the recessed part and discharged through the fixing hole, thus preventing condensate from accumulating on the third section.

[0017] In an optional embodiment of the centrifugal fan described above, the fan further includes: a connecting section extending along the first direction and connecting between the arc-shaped main body section and the fourth section; and a support rib extending along the second direction and spaced apart from the connecting section, wherein the support rib is used to support the frame; wherein the gap between adjacent support ribs allows the fixing wire to pass through.

[0018] The connecting section securely links the arc-shaped main body section and the fourth section, ensuring the integrity and stability of the overall centrifugal fan structure. The support ribs provide reliable support for the frame, preventing deformation or displacement during centrifugal fan operation. The gaps between adjacent support ribs allow the fixing mesh wires to pass through, facilitating easy installation and integration with the frame, further enhancing the robustness of the outlet guard installation.

[0019] In an optional embodiment of the centrifugal fan described above, a retaining element is further included, disposed on the connecting section, and configured to clamp the frame together with the supporting rib.

[0020] The clamping mechanism, along with the support ribs, securely fixes the frame, preventing loosening or displacement during long-term use or fan vibration. This enhances the overall stability of the outlet guard, ensuring it maintains optimal working condition during centrifugal fan operation. Furthermore, the clamping mechanism provides initial positioning for the outlet guard installation, improving installation efficiency.

[0021] In the optional embodiment of the centrifugal fan described above, the outlet guard net further includes outlet mesh wires fixed within the frame. The outlet mesh wires include: a first mesh wire extending axially along the first dividing rib, and the distance between adjacent first mesh wires is equal to the distance between adjacent first dividing ribs; and a second mesh wire extending axially along the second dividing rib, intersecting and connecting with the first mesh wire, and the distance between adjacent second mesh wires is equal to the distance between adjacent second dividing ribs.

[0022] By setting up an air outlet mesh formed by the intersection and connection of the first and second mesh wires, the passing air can be turbulently and regulated, resulting in more uniform and stable airflow. Simultaneously, the first mesh wire extends along the axial direction of the first dividing rib, and the distance between adjacent first mesh wires is equal to the distance between adjacent first dividing ribs; similarly, the second mesh wire extends along the axial direction of the second dividing rib, and the distance between adjacent second mesh wires is equal to the distance between adjacent second dividing ribs. This ensures that the structure formed by the intersection of the air outlet mesh and the first and second dividing ribs remains consistent, guaranteeing overall uniformity.

[0023] Secondly, this utility model provides a portable air conditioner, comprising a housing with an internal cavity defined therein, and an indoor air outlet on the front panel of the housing; an indoor heat exchanger disposed in the indoor cavity; and a centrifugal fan as described above, wherein the indoor air outlet is correspondingly disposed to the airflow outlet, and the centrifugal impeller drives air to flow sequentially through the indoor heat exchanger and the housing cavity, and then to the airflow outlet and the indoor air outlet; and a water receiving component disposed in the indoor cavity for receiving condensate from the indoor heat exchanger and the centrifugal fan.

[0024] When the above technical solution is adopted, the portable air conditioner has the aforementioned centrifugal fan. In the centrifugal fan, the outer surface of the second extension section is divided into multiple small planes by first and second partition ribs disposed on the outer surface of the second extension section. Thus, when the portable air conditioner is in cooling mode, the air after passing through the indoor heat exchanger is low-temperature air. When this low-temperature air passes through the centrifugal fan, the multiple small planes prevent the formation of large areas of condensation on the surface of the second extension section. Therefore, large droplets of condensate can be reduced or even avoided from being blown out with the airflow through the outlet, thereby improving the comfort of the airflow. Furthermore, due to the placement of the first and second partition ribs, when a small amount of condensate is generated, it can be guided to flow along the extension direction of the first or second partition rib, preventing condensate from accumulating locally and dripping, and then being blown into the room or to the user with the airflow. Condensate on the surfaces of the indoor heat exchanger and the centrifugal fan can be collected by a water collection device to prevent corrosion of the indoor heat exchanger, centrifugal fan, and other components. Attached Figure Description

[0025] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0026] Figure 1 This is a structural schematic diagram of a centrifugal fan provided by this utility model;

[0027] Figure 2 yes Figure 1 Enlarged schematic diagram of part A;

[0028] Figure 3 yes Figure 1 Enlarged schematic diagram of part B;

[0029] Figure 4 yes Figure 1 Enlarged schematic diagram of part C;

[0030] Figure 5 This is a schematic diagram of another centrifugal fan provided by this utility model;

[0031] Figure 6 This is a schematic diagram of another centrifugal fan provided by this utility model;

[0032] Figure 7 This is a structural schematic diagram of a portable air conditioner provided by this utility model;

[0033] Figure 8 This is a schematic diagram of the structure of a portable air conditioner with part of the outer casing removed, provided by this utility model.

[0034] Explanation of reference numerals in the attached figures:

[0035] 10. Outer shell; 11. Inner cavity; 12. Outer cavity; 01. Indoor air outlet; 20. Indoor heat exchanger; 30. Water receiving fitting;

[0036] 100. Volute; 101. Air outlet; 102. Air inlet; 103. Receiving cavity; 110. Arc-shaped main body section; 120. First extension section; 200. Volute tongue; 210. Arc-shaped transition section; 220. Second extension section; 310. First partition rib; 320. Second partition rib; 330. Third partition rib; 400. Peripheral part; 410. First periphery; 411. First section; 412. Second section; 413. Water passage hole; 420. Second periphery; 421. Third section; 422. Fourth section; 423. Fixing hole; 430. Connecting section; 431. Support rib; 432. Clamping component; 500. Air outlet guard; 510. Frame; 520. Fixing wire; 530. Air outlet wire; 531. First wire; 532. Second wire. Detailed Implementation

[0037] Preferred embodiments of this application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application. In the following description, for ease of explanation, numerous details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other instances, well-known structures and apparatuses may be simplified for the sake of simplicity.

[0038] It should be noted that in the description of this application, the terms "center," "upper," "lower," "vertical," "inner," and "outer," which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] Firstly, combining Figures 1 to 6As shown, this utility model provides a centrifugal fan, including a volute 100, a volute tongue 200, a first partition rib 310, and a second partition rib 320.

[0041] The volute 100 includes an arc-shaped main body section 110 and a first extension section 120. The arc-shaped main body section 110 encloses a receiving cavity 103 capable of accommodating a centrifugal impeller. The first extension section is connected to the first end of the arc-shaped main body section 110. The volute tongue 200 includes an arc-shaped transition section 210 and a second extension section 220. The arc-shaped transition section 210 is connected to the second end of the arc-shaped main body section 110 and defines an airflow outlet 101 between it and the first extension section 120. The second extension section 220 is connected to the arc-shaped transition section 210 and extends away from the first extension section 120 along a first direction. A plurality of first partition ribs 310 and a plurality of second partition ribs 320 are arranged in a cross-connected manner, protruding from the outer surface of the second extension section 220. The first direction is the width direction of the airflow outlet 101.

[0042] Optionally, the arc-shaped main body section 110 encloses a receiving cavity 103, which is configured to accommodate a centrifugal impeller. The arc-shaped main body section also forms an airflow inlet 102, which, under the action of the centrifugal impeller, can drive air through the airflow inlet 102 into the receiving cavity 103.

[0043] The arc-shaped main body segment 110 has a first extension segment 120 connected to its first end, and a volute tongue 200 connected to its second end. The volute tongue 200 has an arc-shaped transition segment 210 fixedly connected to the second end of the arc-shaped main body segment 110, and defines an airflow outlet 101 between itself and the first extension segment 120. That is, an airflow outlet 101 is formed between the volute tongue 200 and the first extension segment 120. The volute tongue 200 can guide the air within the receiving cavity 103 to flow smoothly towards the airflow outlet 101.

[0044] Optionally, the volute 100 and the volute tongue 200 are integrally formed.

[0045] Optionally, the arc-shaped transition section 210 is connected to a second extension section 220, and the second extension section 220 extends away from the first extension section 120 along a first direction. In this way, the airflow of the air exiting the air outlet 101 can be optimized and energy loss can be reduced.

[0046] In this design, multiple first partition ribs 310 and multiple second partition ribs 320 are arranged on the outer surface of the second extension section 220. The first partition ribs 310 and the second partition ribs 320 are cross-connected, thus dividing the outer surface of the second extension section 220 into multiple small planes. This prevents the formation of large areas of condensation on the outer surface of the second extension section 220 when the airflow passing through the centrifugal fan is low-temperature air. This avoids the airflow from the air outlet 101 carrying a large amount of condensation, thereby preventing water blowing from the centrifugal fan's outlet airflow and improving the comfort of the outlet airflow.

[0047] Furthermore, the first partition rib 310 and the second partition rib 320 can also enhance the structural strength of the second extension section 220 and reduce deformation.

[0048] In addition, the grid structure formed by the intersection of multiple first separating ribs 310 and multiple second separating ribs 320 can play a certain role in turbulence of airflow, which can break up large-scale vortices in the airflow into small-scale vortices, thereby making the airflow more uniform and stable when passing through the airflow outlet 101 and reducing the generation of airflow noise.

[0049] Optionally, the first partition rib 310, the second partition rib 320, and the second extension section 220 are integrally formed. This not only ensures the integrity and stability of the structure but also improves production efficiency and reduces production costs. Moreover, the height of the first partition rib 310 and the second partition rib 320, the included angle between them, the distance between adjacent first partition ribs 310, and the distance between adjacent second partition ribs 320 can be reasonably adjusted according to actual usage needs and design requirements to achieve the best effects in preventing condensation, strengthening the structure, and optimizing airflow.

[0050] Optionally, the connection between the first partition rib 310, the second partition rib 320 and the second extension section 220 is arc-shaped to avoid the accumulation of condensate at the connection corner, which could cause problems such as bacterial growth.

[0051] Optionally, the intersection of the first partition rib 310 and the second partition rib 320 is connected in an arc shape.

[0052] Optionally, the first partition rib 310 extends along the first direction, and the second partition rib 320 extends along the length direction of the airflow outlet.

[0053] Alternatively, the first partition rib 310 extends obliquely relative to the first direction, and the second partition rib 320 extends obliquely relative to the length direction of the airflow outlet.

[0054] Optionally, the volute 100 includes an upper volute and a lower volute that abut against each other, and the upper and lower volutes are connected by one or more of the following methods: snap-fit, screws, etc. Both the upper and lower volutes include an arc-shaped main body segment 110 and a first extension segment 120. Correspondingly, the volute tongue 200 includes an upper volute tongue and a lower volute that abut against each other.

[0055] When the above technical solution is adopted, the outer surface of the second extension section 220 can be divided into multiple small planes by the first partition 310 and the second partition 320 disposed on the outer surface of the second extension section 220. This prevents large-area condensation from forming on the surface of the second extension section 220 when the air passing through the centrifugal fan is low-temperature air. This reduces or even eliminates condensate from being blown out with the airflow through the outlet. Due to the placement of the first partition 310 and the second partition 320, when a small amount of condensate is generated, it can be guided to flow along the extension direction of the first partition 310 or the second partition 320, preventing condensate from accumulating locally and dripping. Simultaneously, the grid structure formed by the intersection of multiple first partition 310s and multiple second partition 320s can provide some turbulence to the airflow, making the airflow more uniform and stable when passing through the air outlet 101, reducing airflow noise. Furthermore, the first partition 310 and the second partition 320 can also enhance the structural strength of the second extension section 220 and reduce deformation.

[0056] In an optional embodiment of the centrifugal fan described above, a third partition rib 330 is further included. The third partition rib 330 extends along a second direction and protrudes from the connection between the second extension section 220 and the arc-shaped transition section 210. The third partition rib 330 can cross-connect with the first partition rib 310 and / or the second partition rib 320. The second direction is the length direction of the airflow outlet 101.

[0057] The third partition rib 330 not only enhances the structural strength of the connection between the second extension section 220 and the arc-shaped transition section 210, preventing deformation due to uneven stress, but also prevents condensate from flowing towards the airflow outlet 101. Furthermore, the third partition rib 330 intersects with the first partition rib 310 and / or the second partition rib 320, forming a more stable grid structure that better guides the flow direction of condensate.

[0058] In an optional embodiment of the centrifugal fan described above, a peripheral portion 400 and a water passage hole 413 are also included. The peripheral portion 400 extends in a direction away from the volute and includes a first peripheral portion 410 and a second peripheral portion 420 connected end to end. The first peripheral portion 410 is arranged circumferentially around the second extension section 220, and the second peripheral portion 420 is arranged around the airflow outlet 101 and fixedly connected to the arc-shaped main body section. The first peripheral portion 410 has a first segment 411 and a second segment 412 arranged opposite to each other in a second direction. Both the first segment 411 and the second segment 412 extend along the first direction and are distributed vertically. The water passage hole 413 is opened at the bend connection between the second segment 412 and the second extension section 220.

[0059] The peripheral portion 400 protects the second extension section 220 and the air outlet 101 from damage caused by external objects. Furthermore, the connection between the peripheral portion 400 and the volute and arc-shaped main body section ensures the stability and sealing of the overall centrifugal fan structure, reduces leakage, and improves the working efficiency of the centrifugal fan. The first section 411 and the second section 412 are arranged vertically. The water passage hole 413 at the bend where the second section 412 connects to the second extension section 220 allows condensate flowing down the surface of the second extension section 220 to drain smoothly, preventing condensate from accumulating in the peripheral portion 400.

[0060] Specifically, the first periphery 410 is arranged circumferentially around the second extension section 220, and the second periphery 420 is arranged around the airflow outlet 101 and fixedly connected to the arc-shaped main body section. This structural arrangement further enhances the overall stability of the centrifugal fan. The periphery 400 not only protects the second extension section 220 and the airflow outlet 101, but also guides the airflow direction to a certain extent, allowing the airflow to flow more smoothly from the airflow outlet 101.

[0061] The water passage hole 413 allows condensate to drain smoothly, preventing it from accumulating in the peripheral part 400. When condensate flows along the first partition rib 310, the second partition rib 320, or the third partition rib 330 to the second section 412 of the peripheral part 400, it can flow out through the water passage hole 413, preventing condensate from accumulating and affecting the normal operation of the equipment.

[0062] Meanwhile, the first segment 411 and the second segment 412 of the first perimeter 410 are distributed vertically and extend along the first direction. This layout can better adapt to the structural characteristics and airflow patterns of the centrifugal fan. The cooperation between the first segment 411 and the second segment 412, the second extension segment 220, and the airflow outlet 101 makes the centrifugal fan more stable and efficient during operation.

[0063] In the optional embodiment of the centrifugal fan described above, the second segment 412 extends inclinedly from the outside inward and away from the first segment 411.

[0064] It should be noted that the second segment 412 from the outside to the inside refers to the end of the second segment 412 that is away from the second extension segment 220 and the end that is connected to the second extension segment 220.

[0065] By extending the second section 412 at such an angle, condensate can flow more easily into the drain hole 413 under the influence of gravity, accelerating drainage and further preventing condensate from accumulating on the second section 412. Simultaneously, the angled second section 412 also acts as a guide, directing condensate more accurately into the drain hole 413, reducing the risk of condensate flowing everywhere and potentially causing moisture or damage to other parts.

[0066] Alternatively, the second segment 412 extends horizontally from the outside inwards and away from the first segment 411.

[0067] In the optional embodiment of the centrifugal fan described above, an outlet guard 500 is also included. The outlet guard 500 is disposed at the airflow outlet 101. The outlet guard 500 includes a frame 510, a fixing mesh 520, and an outlet mesh 530. The fixing mesh 520 is connected to the outer periphery of the frame 510 and extends along a second direction, while the outlet mesh 530 is fixed inside the frame 510. The second periphery 420 has a third segment 421 and a fourth segment 422 arranged opposite to each other in the second direction. Both the third segment 421 and the fourth segment 422 extend along a first direction and have fixing holes 423, into which the fixing mesh 520 can be inserted.

[0068] Among them, the third segment 421 is connected to the second segment 412, and the fourth segment 422 is connected to the first segment 411.

[0069] The outlet mesh 530 effectively prevents foreign objects from entering the centrifugal fan, avoiding damage to internal components and ensuring the normal operation of the centrifugal fan. By inserting the fixing mesh 520 into the fixing holes 423 in the third section 421 and the fourth section 422, the outlet guard mesh 500 can be stably installed, ensuring it will not loosen or shift during centrifugal fan operation.

[0070] Specifically, the exhaust guard 500 prevents foreign objects from entering the centrifugal fan, avoiding damage to components such as the centrifugal impeller and ensuring the normal operation of the centrifugal fan. The frame 510 forms the basic framework of the exhaust guard 500, providing support for the fixed mesh 520 and ensuring its stable placement at the airflow outlet 101. The exhaust mesh 530, located inside the fixed mesh 520, can effectively block clothing.

[0071] The fixing wire 520 extends along the second direction and can be inserted into the fixing holes 423 opened in the third section 421 and the fourth section 422. This connection method makes the air outlet guard 500 firmly connected to the second periphery 420 of the peripheral part 400, and it is not easy to loosen or fall off.

[0072] In this solution, the air outlet guard 500 can also play a certain role in turbulence of the airflow at the outlet 101, reducing the turbulence of the airflow and preventing it from blowing directly on the user.

[0073] Furthermore, the exhaust guard 500 enhances the safety of the centrifugal fan. During operation, the high-speed airflow can potentially harm those nearby. The exhaust guard 500 effectively blocks the direct impact of the airflow, reducing safety risks. Moreover, the frame 510 and fixing wires 520 of the exhaust guard 500 can be made of different materials and specifications to meet various environmental and usage requirements.

[0074] Alternatively, the air outlet mesh can be made of stainless steel. Stainless steel has good corrosion resistance and is easy to clean.

[0075] In the optional embodiment of the centrifugal fan described above, a portion of the plate of the third section 421 is recessed in a direction away from the second section 412 to form a recessed portion, and a fixing hole 423 is formed at the bottom of the recessed portion.

[0076] By setting the recessed portion and placing the fixing hole 423 at the bottom of the recessed portion, not only can the air outlet guard 500 be fixed, but also when condensate flows along the third section 421, the condensate can be collected in the recessed portion and discharged through the fixing hole 423, thus preventing condensate from accumulating on the third section 421.

[0077] Optionally, a plurality of recesses are provided at intervals along the width direction of the airflow outlet 101, and the number of recesses matches the number of fixing wires 520 so that the number of fixing holes 423 matches the number of fixing wires 520.

[0078] Alternatively, a recess extends along the width of the airflow outlet 101.

[0079] In an optional embodiment of the centrifugal fan described above, a connecting section 430 and a support rib 431 are further included. The connecting section 430 extends along a first direction and connects the arc-shaped main body section 110 and the fourth section 422. The support rib 431 extends along a second direction and is spaced apart from the connecting section 430, serving to support the frame 510. The gaps between adjacent support ribs 431 allow the fixing wire 520 to pass through.

[0080] The connecting section 430 securely connects the arc-shaped main body section 110 and the fourth section 422, ensuring the integrity and stability of the overall centrifugal fan structure. The supporting ribs 431 provide reliable support for the frame 510, preventing deformation or displacement during centrifugal fan operation. The gaps between adjacent supporting ribs 431 allow the fixing wire 520 to pass through, enabling smooth installation and proper engagement with the frame 510, further enhancing the stability of the outlet guard 500 installation.

[0081] In this design, the support ribs 431 are used to support the frame 510. Simultaneously, the diameter of the fixing holes 423 can be larger than the diameter of the fixing wires 520 to allow the condensate in the third section to flow downwards and drain.

[0082] In an optional embodiment of the centrifugal fan described above, a retaining member 432 is also included. The retaining member 432 is disposed on the connecting section 430 and is configured to clamp the frame 510 together with the support rib 431.

[0083] The clamping element 432, together with the supporting rib 431, more firmly secures the frame 510, preventing it from loosening or shifting during long-term use or fan vibration. This further enhances the overall structural stability of the outlet guard 500, ensuring it maintains good working condition during centrifugal fan operation.

[0084] Furthermore, the cooperation between the retaining member 432 and the supporting rib 431 allows the frame 510 to better disperse stress when subjected to external impact, reducing the possibility of damage and improving the durability of the air outlet guard 500. In addition, the presence of the retaining member 432 also facilitates the installation process of the air outlet guard 500; simply placing the frame 510 accurately between the retaining member 432 and the supporting rib 431 completes the initial fixing, improving installation efficiency.

[0085] Alternatively, the retaining member 432 is constructed as a plate and arranged at an angle toward the support rib 431. In this way, the opening gap formed between the retaining member 432 and the support rib 431 is smaller than the clamping gap between them, so as to prevent the frame 510 from coming out.

[0086] In the optional embodiment of the centrifugal fan described above, the outlet mesh 530 includes a first mesh 531 and a second mesh 532. The first mesh 531 extends axially along the first separating rib 310, and the distance between adjacent first mesh 531 is equal to the distance between adjacent first separating ribs 310. The second mesh 532 extends axially along the second separating rib 320, intersects and connects with the first mesh 531, and the distance between adjacent second mesh 532 is equal to the distance between adjacent second separating ribs 320.

[0087] By setting the outlet mesh 530, where the first mesh 531 and the second mesh 532 are intersected, the structural strength of the outlet guard 500 is further enhanced, making it more stable and durable. Simultaneously, the first mesh 531 extends axially along the first dividing rib 310, and the distance between adjacent first mesh 531 is equal to the distance between adjacent first dividing ribs 310; similarly, the second mesh 532 extends axially along the second dividing rib 320, and the distance between adjacent second mesh 532 is equal to the distance between adjacent second dividing ribs 320. This ensures that the outlet guard 500 maintains consistency with the structure formed by the intersection of the first dividing rib 310 and the second dividing rib 320, guaranteeing overall uniformity. This intersecting structure also makes the blown airflow more uniform and stable, effectively improving the airflow quality of the centrifugal fan.

[0088] In addition, the cross-connected first mesh wire 531 and second mesh wire 532 structure can also increase the contact area between the airflow and the air outlet guard 500 to a certain extent, reduce the airflow velocity, reduce the generation of airflow noise, and improve the comfort of the air outlet airflow.

[0089] Alternatively, the extension direction of the first mesh wire 531 is different from the axial direction of the first partition rib 310, and / or the extension direction of the second mesh wire 532 is different from the axial direction of the second partition rib 320.

[0090] Secondly, combining Figures 1 to 8 As shown, this utility model provides a portable air conditioner, including a housing 10, an indoor heat exchanger 20, a centrifugal fan as described above, and a water receiving component 30. The housing 10 defines an indoor cavity 11, and the front panel of the housing 11 has an indoor air outlet 01. The indoor heat exchanger 20 is disposed in the indoor cavity 11. The centrifugal fan, as described above, is disposed in the indoor cavity 11. The indoor air outlet 01 and the airflow outlet 101 are correspondingly arranged. The centrifugal impeller drives air to flow sequentially through the indoor heat exchanger 20 and the receiving cavity 103, and then flows to the airflow outlet 101 and the indoor air outlet 01. The water receiving component 30 is disposed in the indoor cavity 11 to collect condensate from the indoor heat exchanger 20 and the centrifugal fan 30.

[0091] Optionally, the portable air conditioner includes a housing 10, the interior of which defines an independent indoor cavity 11 and an outdoor cavity 12. A centrifugal fan, as described above, is arranged in the indoor cavity 11. The front panel of the housing 10 has an indoor air outlet 01 corresponding to the indoor cavity 11. The indoor air outlet 01 is connected to the airflow outlet 101, and the indoor air outlet 01, the second extension section 220, and the airflow outlet 101 together form the same shape and size.

[0092] Alternatively, the centrifugal fan, as described above, can also be arranged in the outdoor cavity 12.

[0093] When the above technical solution is adopted, the portable air conditioner has the aforementioned centrifugal fan. In the centrifugal fan, the outer surface of the second extension section 220 is divided into multiple small planes by the first partition 310 and the second partition 320 disposed on the outer surface. Thus, when the portable air conditioner is in cooling mode, the air after passing through the indoor heat exchanger 20 is low-temperature air. When this low-temperature air passes through the centrifugal fan, the multiple small planes prevent the formation of large areas of condensation on the surface of the second extension section 220. Therefore, large droplets of condensate can be reduced or even avoided from being blown out with the airflow through the outlet air, thereby improving the comfort of the outlet airflow. Furthermore, due to the placement of the first partition 310 and the second partition 320, when a small amount of condensate is generated, the condensate can be guided to flow along the extension direction of the first partition 310 or the second partition 320, preventing the condensate from accumulating locally and dripping, and then being blown into the room or to the user with the outlet airflow. The condensate on the surfaces of the indoor heat exchanger 20 and the centrifugal fan can be collected by the water receiving part 30 to avoid corrosion of the indoor heat exchanger 20, the centrifugal fan and other components.

[0094] The water passage 413 is provided corresponding to the water receiving part 30. In this way, the water discharged through the water passage 413 can be collected by the water receiving part 30, improving the comfort of the airflow.

[0095] It should be noted that the above preferred embodiments are merely illustrative of the principles of this application and are not intended to limit the scope of protection of this application. Without departing from the principles of this application, those skilled in the art can adjust the above settings to make this application applicable to more specific application scenarios.

[0096] Those skilled in the art will understand that although some embodiments herein include certain features included in the embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, any of the claimed embodiments in the claims of this application can be used in any combination.

[0097] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A centrifugal fan characterized by comprising: include: The volute (100) includes an arc-shaped main body section (110) and a first extension section (120), wherein the arc-shaped main body section (110) encloses a receiving cavity (103) capable of accommodating a centrifugal impeller, and the first extension section (120) is connected to the first end of the arc-shaped main body section (110); The volute tongue (200) includes an arcuate transition section (210) and a second extension section (220). The arcuate transition section (210) is connected to the second end of the arcuate main body section (110) and defines an airflow outlet (101) between it and the first extension section (120). The second extension section (220) is connected to the arcuate transition section (210) and extends away from the first extension section (120) in a first direction. A plurality of first partition ribs (310) and a plurality of second partition ribs (320) are arranged in a cross-connected manner, protruding from the outer surface of the second extension (220); Wherein, the first direction is the width direction of the airflow outlet (101).

2. The centrifugal fan of claim 1, wherein Also includes: The third dividing rib (330) extends along the second direction and protrudes at the connection between the second extension section (220) and the arc transition section (210). The third dividing rib (330) is cross-connected with the first dividing rib (310) and / or the second dividing rib (320). The second direction is the length direction of the airflow outlet (101).

3. The centrifugal fan according to claim 2, characterized in that, Also includes: The peripheral portion (400) extends in a direction away from the volute (100) and includes a first peripheral portion (410) and a second peripheral portion (420) connected end to end. The first peripheral portion (410) is arranged circumferentially around the second extension segment (220), and the second peripheral portion (420) is arranged around the airflow outlet (101) and fixedly connected to the arc-shaped main body segment (110). The first peripheral portion (410) has a first segment (411) and a second segment (412) arranged opposite to each other in the second direction. Both the first segment (411) and the second segment (412) extend along the first direction and are distributed vertically. A water passage hole (413) is provided at the bend connection between the second section (412) and the second extension section (220).

4. The centrifugal fan according to claim 3, characterized in that, The second segment (412) of the first periphery (410) extends obliquely from the outside to the inside and in a direction away from the first segment (411).

5. The centrifugal fan according to claim 3, characterized in that, Also includes: An air outlet guard (500) is provided at the airflow outlet (101). The air outlet guard (500) includes a frame (510), a fixing wire (520), and an air outlet wire (530). The fixing wire (520) is connected to the outer periphery of the frame (510) and extends along the second direction. The air outlet wire (530) is fixed inside the frame (510). The second periphery (420) has a third segment (421) and a fourth segment (422) arranged opposite to each other in the second direction. The third segment (421) and the fourth segment (422) both extend along the first direction and have fixing holes (423). The fixing wire (520) can be inserted into the fixing holes (423).

6. The centrifugal fan according to claim 5, characterized in that, The third segment (421) is partially recessed in a direction away from the second segment (412) to form a recessed portion, and the fixing hole (423) is formed at the bottom of the recessed portion.

7. The centrifugal fan according to claim 5, characterized in that, Also includes: A connecting segment (430) extends along the first direction and connects the arc-shaped main body segment (110) and the fourth segment (422); Support ribs (431) extend along the second direction and are spaced apart at the connecting section (430). The support ribs (431) are used to support the frame (510). The gap between adjacent support ribs (431) allows the fixing wire (520) to pass through.

8. The centrifugal fan according to claim 7, characterized in that, Also includes: A retaining member (432) is disposed on the connecting section (430) and is configured to clamp the frame (510) together with the supporting rib (431).

9. The centrifugal fan according to claim 5, characterized in that, The air outlet mesh (530) includes: The first mesh wire (531) extends along the axial direction of the first partition rib (310), and the distance between adjacent first mesh wires (531) is equal to the distance between adjacent first partition ribs (310). The second mesh wire (532) extends along the axial direction of the second partition rib (320) and crosses with the first mesh wire (531), and the distance between adjacent second mesh wires (532) is equal to the distance between adjacent second partition ribs (320).

10. A portable air conditioner, characterized in that, include; The outer casing (10) has an inner cavity (11) defined inside, and the front panel of the outer casing (10) is provided with an indoor air outlet (01); An indoor heat exchanger (20) is disposed in the indoor cavity (11); and The centrifugal fan as described in any one of claims 1 to 9 is disposed in the indoor cavity (11), the indoor air outlet (01) is disposed corresponding to the airflow outlet (101), and the centrifugal impeller drives the air to flow sequentially through the indoor heat exchanger (20) and the receiving cavity (103) and then to the airflow outlet (101) and the indoor air outlet (01); A water receiving component (30) is provided in the indoor cavity (11) for receiving condensate from the indoor heat exchanger (20) and the centrifugal fan.

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