Centrifugal fan blade, centrifugal module, indoor unit and air conditioner

Abstract

The utility model discloses a centrifugal fan blade, a centrifugal module, an indoor unit and an air conditioner, the centrifugal fan blade comprises a fan blade and a middle partition plate, the middle partition plate is arranged in the fan blade and divides the fan blade into a first cavity and a second cavity, and a through hole is formed in the middle partition plate to communicate the first cavity with the second cavity; according to the centrifugal fan blade, the through hole is formed in the middle partition plate, the first cavity and the second cavity which are separated are communicated, airflow on the high-pressure side of the centrifugal fan blade enters the low-pressure side through the through hole, then the air pressure on the two sides of the middle partition plate is close, surge caused by the large pressure difference between the two sides of the middle partition plate is avoided, and the working stability of the centrifugal fan blade is improved.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning equipment technology, and in particular to a centrifugal fan blade, a centrifugal module, an indoor unit, and an air conditioner. Background Technology

[0002] Currently, ducted indoor units account for a large proportion of the air conditioning market. Ducted indoor units are installed in the ceiling, and their concealed installation is favored by consumers. Compared with units of the same capacity, the smaller the unit size, the more installation occasions it can adapt to, and the better its market competitiveness.

[0003] Most duct-type indoor units use centrifugal fan blades to convert axial airflow into circumferential airflow. However, in the overall layout design of duct-type indoor units, the motor is usually installed between two centrifugal fan blades or between the centrifugal fan blades and the side plate. This results in different air intake areas on both sides of the centrifugal fan blades, leading to a large difference in air pressure on both sides of the centrifugal fan blades. This causes the centrifugal fan blades to surge, making it impossible for the centrifugal fan blades to operate stably. Utility Model Content

[0004] The main objective of this utility model embodiment is to provide a centrifugal fan blade, a centrifugal module, an indoor unit, and an air conditioner, aiming to improve the technical problem in the prior art where the air pressure difference on both sides of the centrifugal fan blade is too large due to the duct-type indoor unit layout.

[0005] An embodiment of this utility model provides a centrifugal fan blade, which includes:

[0006] Wind blades;

[0007] A partition plate is disposed inside the fan blade to divide the fan blade into a first cavity and a second cavity. The partition plate is provided with through holes to connect the first cavity and the second cavity.

[0008] In some embodiments of this utility model, the partition plate is provided with reinforcing ribs, which are arranged around the edge of the through hole.

[0009] In some embodiments of this utility model, the reinforcing rib is inclined on the side of the partition plate away from the reinforcing rib, and the inclined surface extends from the surface of the partition plate to the top of the reinforcing rib.

[0010] In some embodiments of this utility model, the reinforcing rib is integrally formed with the middle partition plate;

[0011] Alternatively, the reinforcing rib is glued to the middle partition.

[0012] In some embodiments of this utility model, the partition plate is provided with a rotating shaft connection hole, the center of the rotating shaft connection hole coincides with the center of the partition plate, and the partition plate is provided with a plurality of through holes, which are arranged in a ring array around the center of the partition plate.

[0013] In some embodiments of this utility model, the through hole is a circular through hole, and the diameter of the circular through hole is 0.15-0.35 times the diameter of the middle partition plate.

[0014] In some embodiments of this utility model, a centrifugation module is also provided, which includes:

[0015] The volute has two air inlets arranged opposite to each other and an air outlet disposed between the two air inlets;

[0016] The aforementioned centrifugal fan blades are disposed in the volute, with the first cavity and the second cavity respectively facing the two air inlets.

[0017] In some embodiments of this utility model, an indoor unit is also provided, which includes the centrifugal module described above.

[0018] In some embodiments of this utility model, the indoor unit includes a fixed plate, a motor, and a plurality of centrifugal modules. The plurality of centrifugal modules include a first centrifugal module, a second centrifugal module, and a third centrifugal module. The first centrifugal module, the second centrifugal module, and the third centrifugal module are spaced apart from each other along the length direction of the fixed plate. The motor is disposed between the first centrifugal module and the second centrifugal module, and the rotating shaft of the motor is connected to the centrifugal fan blades in the first centrifugal module, the second centrifugal module, and the third centrifugal module, respectively.

[0019] In some embodiments of this utility model, an air conditioner is also provided, which includes the indoor unit described above.

[0020] The present invention provides a centrifugal fan blade, a centrifugal module, an indoor unit, and an air conditioner. The centrifugal fan blade connects a first chamber and a second chamber separated by a through hole in the middle partition. The airflow on the high-pressure side of the centrifugal fan blade enters the low-pressure side through the through hole, thereby making the air pressure on both sides of the middle partition similar, avoiding surge caused by a large pressure difference on both sides of the middle partition, and thus improving the stability of the centrifugal fan blade operation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a side view schematic diagram of a centrifugal fan blade according to an embodiment of the present invention;

[0023] Figure 2 This is a half-sectional schematic diagram of a centrifugal fan blade according to an embodiment of the present invention;

[0024] Figure 3 This is a three-dimensional schematic diagram of a centrifugal fan blade according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of a centrifuge module according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of an indoor unit air duct assembly according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of an indoor unit according to an embodiment of the present invention.

[0028] Reference numerals: 100, centrifugal fan blade; 101, first cavity; 102, second cavity; 110, fan blade; 120, middle partition; 121, through hole; 122, reinforcing rib; 130, shaft connection hole; 200, fixing plate; 300, centrifugal module; 310, volute; 311, upper volute; 312, lower volute; 400, motor. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] like Figures 1-6 As shown, the present invention provides a centrifugal fan blade 100, which includes a fan blade 110 and a partition plate 120. The partition plate 120 is disposed inside the fan blade 110, dividing the fan blade 110 into a first cavity 101 and a second cavity 102. The partition plate 120 is provided with a through hole 121 to connect the first cavity 101 and the second cavity 102.

[0034] The fan blade 110 is generally an annular fan blade 110, and the partition plate 120 is disposed inside the fan blade 110 and perpendicular to the axis of the annular fan blade 110, so as to divide the fan blade 110 into a first cavity 101 and a second cavity 102. Generally, the partition plate 120 is disposed at the midpoint of the length of the fan blade 110, so that the first cavity 101 and the second cavity 102 are of the same length.

[0035] It is understandable that the centrifugal fan 100 connects the separated first cavity 101 and second cavity 102 by providing a through hole 121 on the partition plate 120. The airflow on the high-pressure side of the centrifugal fan 100 enters the low-pressure side through the through hole 121, thereby making the air pressure on both sides of the partition plate 120 similar, avoiding surge caused by a large pressure difference on both sides of the partition plate 120, and thus improving the stability of the centrifugal fan 100.

[0036] In some embodiments, the through hole 121 can be any one or more of the following: circular through hole 121, rectangular through hole 121, and elongated through hole 121.

[0037] Normally, the partition 120 is a circular plate structure with the same diameter as the inner diameter of the fan blade 110, meaning there is no gap between the partition 120 and the fan blade 110. However, in some embodiments, a gap can be formed in the area where the partition 120 and the fan blade 110 meet, so that the first cavity 101 and the second cavity 102 can be connected.

[0038] In some embodiments, a reinforcing rib 122 is provided on the partition plate 120, and the reinforcing rib 122 is arranged around the edge of the through hole 121.

[0039] It is understandable that opening a through hole 121 in the partition plate 120 will weaken the structural strength of the partition plate 120 to some extent. During the high-speed operation of the centrifugal fan blade 100, the partition plate 120 may not be able to withstand the centrifugal force, causing the partition plate 120 to crack or break. Therefore, adding a reinforcing rib 122 to the edge of the through hole 121 can improve the structural strength of the partition plate 120.

[0040] Generally, each through hole 121 is surrounded by a reinforcing rib 122, that is, multiple through holes 121 have multiple reinforcing ribs 122.

[0041] One of the through holes 121 has reinforcing ribs 122 on both sides of the partition plate 120.

[0042] In some embodiments, the reinforcing rib 122 is provided with an inclined surface on the side of the partition plate 120 away from the inclined surface, and the inclined surface extends from the surface of the partition plate 120 to the top of the reinforcing rib 122.

[0043] Understandably, the outer side of the reinforcing rib 122 is made into a slope, which can reduce the disturbance to the airflow during the rotation of the fan blade 110, thereby avoiding the eddies caused by the increased through hole 121 and the reinforcing rib 122, and also avoiding noise caused by airflow turbulence.

[0044] In some embodiments, the reinforcing rib 122 is integrally formed with the partition plate 120. For example, the partition plate 120 having through holes 121 and reinforcing ribs 122 is directly die-cast using a mold through die-casting technology.

[0045] In some embodiments, the reinforcing rib 122 is glued to the partition plate 120. For example, the reinforcing rib 122 is directly glued to the edge of the through hole 121.

[0046] In some embodiments, the partition plate 120 is provided with a rotating shaft connection hole 130, the center of the rotating shaft connection hole 130 coincides with the center of the partition plate 120, and the partition plate 120 is provided with a plurality of through holes 121, which are arranged in a ring array around the center of the partition plate 120.

[0047] That is, multiple through holes 121 are arranged in a ring array around the center of the partition plate 120, which can make the airflow on the high-pressure side of the partition plate 120 enter the high-pressure side evenly, and avoid airflow turbulence caused by uneven air intake.

[0048] In some embodiments, the partition plate 120 is provided with five circular through holes 121, which are arranged in a ring array around the center of the partition plate 120.

[0049] In some embodiments, the through hole 121 is a circular through hole 121, and the diameter of the circular through hole 121 is 0.15-0.35 times the diameter of the partition plate 120.

[0050] It is understandable that if the diameter of the through hole 121 is too large, it will affect the structural strength of the partition plate 120. If the diameter of the through hole 121 is too small, it will affect the air flow rate from the high-pressure side to the low-pressure side. Therefore, limiting the diameter of the circular through hole 121 to between 0.15 and 0.35 of the diameter of the partition plate 120 can both take into account the flow rate on both sides of the partition plate 120 and ensure that the partition plate 120 has sufficient structural strength.

[0051] In some embodiments, a centrifugal module 300 is also provided, including a volute 310 and the aforementioned centrifugal fan blade 100. The volute 310 has two air inlets disposed opposite to each other and an air outlet disposed between the two air inlets. The centrifugal fan blade 100 is disposed in the volute 310, and the first cavity 101 and the second cavity 102 are respectively positioned opposite the two air inlets.

[0052] The volute 310 generally includes an upper volute 311 and a lower volute 312, which are interlocked to form the volute 310.

[0053] Since the centrifugal module 300 includes the centrifugal fan blade 100 described above, the centrifugal module 300 has at least some or all of the beneficial effects of the above embodiments, which will not be described in detail here.

[0054] In some embodiments, an indoor unit is also provided, which includes the centrifugal module described above. Since the centrifugal module includes at least some or all of the embodiments of the centrifugal fan 100 described above, the indoor unit has at least the beneficial effects of some or all of the embodiments described above, which will not be elaborated here.

[0055] In some embodiments, the indoor unit includes a fixed plate 200, a motor 400, and a plurality of centrifugal modules 300. The plurality of centrifugal modules 300 includes a first centrifugal module 300, a second centrifugal module 300, and a third centrifugal module 300. The first centrifugal module 300, the second centrifugal module 300, and the third centrifugal module 300 are spaced apart from each other along the length direction of the fixed plate 200. The motor 400 is disposed between the first centrifugal module 300 and the second centrifugal module 300. The rotation shaft of the motor 400 is connected to the centrifugal fan blades 100 in the first centrifugal module 300, the second centrifugal module 300, and the third centrifugal module 300, respectively.

[0056] In some embodiments, an air conditioner is also provided, the refrigeration device including the above-described indoor unit. Since the indoor unit includes at least some or all of the embodiments of the centrifugal fan blade 100 described above, the air conditioner has at least the beneficial effects of some or all of the above-described embodiments, which will not be described in detail here.

[0057] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made based on the contents of the present utility model specification and drawings under the application concept of the present utility model, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A centrifugal fan blade, characterized in that, include: Wind blades; A partition plate is disposed inside the fan blade to divide the fan blade into a first cavity and a second cavity. The partition plate is provided with through holes to connect the first cavity and the second cavity.

2. The centrifugal fan blade according to claim 1, characterized in that, The partition plate is provided with reinforcing ribs, which are arranged around the edge of the through hole.

3. The centrifugal fan blade according to claim 2, characterized in that, The reinforcing rib is inclined on the side of the diaphragm that is away from the diaphragm, and the inclined surface extends from the surface of the diaphragm to the top of the reinforcing rib.

4. The centrifugal fan blade according to claim 2, characterized in that, The reinforcing rib is integrally formed with the central partition plate; Alternatively, the reinforcing rib is glued to the partition plate.

5. The centrifugal fan blade according to claim 1, characterized in that, The partition plate is provided with a rotating shaft connection hole, the center of which coincides with the center of the partition plate. The partition plate is provided with a plurality of through holes, which are arranged in a ring array around the center of the partition plate.

6. The centrifugal fan blade according to claim 5, characterized in that, The through hole is a circular through hole, and the diameter of the circular through hole is 0.15-0.35 times the diameter of the middle partition plate.

7. A centrifuge module, characterized in that, include: The volute has two air inlets arranged opposite to each other and an air outlet disposed between the two air inlets; The centrifugal fan blade according to any one of claims 1-6 is disposed in the volute, with the first cavity and the second cavity respectively facing the two air inlets.

8. An indoor unit, characterized in that, Includes the centrifuge module as described in claim 7.

9. The indoor unit according to claim 8, characterized in that, The indoor unit includes a fixed plate, a motor, and multiple centrifugal modules. The multiple centrifugal modules include a first centrifugal module, a second centrifugal module, and a third centrifugal module. The first centrifugal module, the second centrifugal module, and the third centrifugal module are spaced apart from each other along the length of the fixed plate. The motor is disposed between the first centrifugal module and the second centrifugal module, and the rotation shaft of the motor is connected to the centrifugal fan blades in the first centrifugal module, the second centrifugal module, and the third centrifugal module, respectively.

10. An air conditioner, characterized in that, Including the indoor unit as described in any one of claims 8-9.

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