Forward centrifugal wind wheel and application of forward centrifugal wind wheel to duct type air conditioner

Abstract

The forward centrifugal wind wheel comprises a wheel disc located in the middle, a first wind wheel assembly and a second wind wheel assembly are arranged on the two sides of the wheel disc respectively, a shaft core is arranged in the center of the wheel disc, a through hole is formed in the center of the wheel disc, and the shaft core is located in the through hole. A plurality of first guide pieces and a plurality of second guide pieces extend out of the inner wall of the through hole in the directions of the first wind wheel assembly and the second wind wheel assembly correspondingly, and the ends of the first guide pieces and the ends of the second guide pieces are connected with the outer side face of the shaft core correspondingly. And the first guide sheet and the second guide sheet are respectively provided with a first inclined guide surface and a second inclined guide surface which are inclined to the surface of the wheel disc. And the first inclined guide surface and the second inclined guide surface play a role in guiding internal airflow, so that the airflow enters the wind wheel more smoothly, the noise is reduced, and the working efficiency of the duct type air conditioner is improved.

Description

Technical Field

[0001] The utility model relates to a forward centrifugal wind wheel and application thereof in a duct machine. Background Art

[0002] Duct machine refers to the air duct and duct equipment used in air conditioning system. It is widely used in different types of buildings. It is mainly used to transport and distribute air to realize the circulation and regulation of indoor air. It is an important component of air conditioning system and plays a key role in regulating and maintaining indoor air quality. The existing duct machine includes a fan volute, a forward centrifugal wind wheel and a motor. A cavity for accommodating the forward centrifugal wind wheel is arranged in the middle of the fan volute. Air inlets connected to the cavity are arranged on both end surfaces of the fan volute. The forward centrifugal wind wheel is installed in the cavity. The rotating shaft of the motor extends into the cavity and is connected to the shaft core of the forward centrifugal wind wheel. The forward centrifugal wind wheel of the duct machine includes a wheel disc located in the middle. The first wind wheel assembly and the second wind wheel assembly are respectively arranged on both sides of the wheel disc. The first wind wheel assembly and the second wind wheel assembly face the two air inlets respectively. The center of the wheel disc is provided with a shaft core. The end of the motor shaft is inserted into the shaft core and fixed by screws, so that the shaft drives the forward centrifugal wind wheel to rotate. In the actual operation of the duct machine, the gas enters the cavity through the air inlet, and the forward centrifugal fan wheel works to blow the gas to the evaporator in the duct machine. After the temperature is reduced by the evaporator, it flows into the room. In the actual operation of the duct machine, since the surface of the wheel is flat, when the gas flows into the fan wheel, the fan wheel works to form a low-speed area in the middle of the inner side of the fan wheel around the shaft core, causing backflow, which can easily lead to reduced efficiency of the duct machine and increased noise. Utility Model Content

[0003] The utility model provides a forward centrifugal wind wheel and an application thereof to a duct fan, so as to solve the problems of low efficiency and high noise of the duct fan in the prior art.

[0004] The technical solution of the utility model is achieved in this way:

[0005] The first object of the utility model is to provide a forward centrifugal wind wheel, comprising a wheel disk located in the middle, a first wind wheel assembly and a second wind wheel assembly are respectively arranged on both sides of the wheel disk, the first wind wheel assembly comprises a plurality of first blades and a first impeller ring connecting the ends of each first blade, the second wind wheel assembly comprises a plurality of second blades and a second impeller ring connecting the ends of each second blade, an axis core is arranged at the center of the wheel disk, and it is characterized in that: a through hole is arranged at the center of the wheel disk, the axis core is arranged in the through hole, a plurality of first guide pieces and a plurality of second guide pieces are respectively extended from the inner wall of the through hole toward the first wind wheel assembly and the second wind wheel assembly, the ends of the first guide piece and the ends of the second guide piece are respectively connected to the outer side surface of the axis core, the first guide piece is provided with a first inclined guide surface inclined to the surface of the wheel disk, and the second guide piece is provided with a second inclined guide surface inclined to the surface of the wheel disk.

[0006] The first guide piece and the second guide piece are distributed at intervals on the outer circumference of the shaft core.

[0007] The first guide piece and the second guide piece are both provided with reinforcing ribs on the side facing the shaft core.

[0008] The first guide piece and the second guide piece are connected to two ends of the shaft core respectively.

[0009] The widths of the first guide piece and the second guide piece gradually increase from the shaft core to the wheel disc.

[0010] The number of the first guide plates and the number of the second guide plates are both five.

[0011] The first object of the utility model is to provide a duct fan, comprising a fan volute, a forward centrifugal fan wheel and a motor, a cavity is arranged in the middle of the fan volute, air inlets are arranged on both end surfaces of the fan volute, the air inlets are connected with the cavity, the forward centrifugal fan wheel is installed in the cavity, the rotating shaft of the motor extends into the cavity and is connected with the shaft core of the forward centrifugal fan wheel, and is characterized in that: the forward centrifugal fan wheel is the forward centrifugal fan wheel described above.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] 1. The forward centrifugal wind wheel comprises a wheel disc located in the middle, and a first wind wheel assembly and a second wind wheel assembly are respectively arranged on both sides of the wheel disc, the first wind wheel assembly comprises a plurality of first blades and a first impeller enclosure connecting the ends of each first blade, the second wind wheel assembly comprises a plurality of second blades and a second impeller enclosure connecting the ends of each second blade, and an axis core is arranged at the center of the wheel disc, characterized in that: a through hole is arranged at the center of the wheel disc, the axis core is arranged in the through hole, the inner wall of the through hole extends a plurality of first guide blades and a plurality of second guide blades toward the first wind wheel assembly and the second wind wheel assembly, respectively, the ends of the first guide blades and the ends of the second guide blades are respectively connected to the outer side surface of the axis core, the first guide blade is provided with a first oblique guide surface inclined to the surface of the wheel disc, and the second guide blade is provided with a second oblique guide surface inclined to the surface of the wheel disc. The through hole connects the spaces on both sides of the wheel disc, and the first oblique guide surface and the second oblique guide surface play a guiding role on the airflow, so that the airflow enters the wind wheel more smoothly, so that the backflow phenomenon inside the forward centrifugal wind wheel is reduced, the noise is reduced, and the working efficiency of the air duct machine is increased.

[0014] 2. Other advantages of the present invention are described in detail in the embodiment section. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a forward centrifugal wind wheel provided in Embodiment 1 of the present utility model;

[0016] Figure 2 for Figure 1 A magnified image of point A;

[0017] Figure 3 It is a schematic diagram of the structure of the forward centrifugal wind wheel from another angle;

[0018] Figure 4 is a side view of a forward centrifugal wind wheel;

[0019] Figure 5 for Figure 4 BB cross-section diagram;

[0020] Figure 6 Schematic diagram of the airflow direction inside the forward centrifugal impeller. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1:

[0023] like Figures 1 to 5 As shown, the present embodiment provides a forward centrifugal wind wheel, comprising a wheel disc 1 located in the middle, a first wind wheel assembly 2 and a second wind wheel assembly 3 are respectively arranged on both sides of the wheel disc 1, the first wind wheel assembly 2 comprises a plurality of first blades and a first impeller ring 22 connecting the ends of each first blade 21, the second wind wheel assembly 3 comprises a plurality of second blades 31 and a second impeller ring 32 connecting the ends of each second blade 31, an axis core 4 is arranged at the center of the wheel disc 1, characterized in that: a through hole 11 is arranged at the center of the wheel disc 1, the axis core 4 is arranged in the through hole 11, a plurality of first guide blades 12 and a plurality of second guide blades 13 are respectively extended from the inner wall of the through hole 11 toward the first wind wheel assembly 2 and the second wind wheel assembly 3, the ends of the first guide blades 12 and the ends of the second guide blades 13 are respectively connected to the outer side surface of the axis core 4, the first guide blade 12 is provided with a first inclined guide surface 121 inclined to the surface of the wheel disc 1, and the second guide blade 13 is provided with a second inclined guide surface 131 inclined to the surface of the wheel disc 1.

[0024] The through hole 11 of the forward centrifugal wind wheel connects the spaces on both sides of the wheel disc 1, and the first inclined guide surface 121 and the second inclined guide surface 131 guide the airflow, so that the airflow enters the interior of the forward centrifugal wind wheel more smoothly, thereby reducing the backflow phenomenon inside the forward centrifugal wind wheel, reducing noise, and thus increasing the working efficiency of the air duct machine.

[0025] The first guide blade 12 and the second guide blade 13 are spaced apart and distributed on the outer periphery of the shaft core 4. The first guide blade 12 and the second guide blade 13 fill the space of the low-speed area (around the shaft core 4) inside the forward centrifugal impeller, reducing the volume of the low-speed area, further weakening or eliminating the backflow in the low-speed area, and at the same time increasing the connection strength between the shaft core 4 and the wheel disc 1, so that the forward centrifugal impeller is less deformed during injection molding.

[0026] The first guide blade 12 and the second guide blade 13 are both provided with reinforcing ribs 14 on the side facing the shaft core 4, so as to further enhance the strength of the forward centrifugal impeller.

[0027] The first guide piece 12 and the second guide piece 13 are connected to two ends of the shaft core 4 respectively.

[0028] The widths of the first guide piece 12 and the second guide piece 13 gradually increase from the shaft core 4 to the wheel disc 1 .

[0029] The number of the first guide blades 12 and the second guide blades 13 is four, five or six, which increases the flow area of ​​the airflow in the middle of the forward centrifugal wind wheel and increases the working capacity of the first wind wheel assembly 2 and the second wind wheel assembly 3.

[0030] like Figure 6 As shown (the arrow in the figure indicates the direction of airflow), for the forward centrifugal wind wheel described in this embodiment, when the airflow approaches the axis core 4, the first inclined guide surface 121 and the second inclined guide surface 131 guide the airflow, thereby reducing the internal airflow backflow of the forward centrifugal wind wheel, making the forward centrifugal wind wheel less noisy and more efficient. In addition, compared with the existing forward centrifugal wind wheel, the forward centrifugal wind wheel described in this embodiment is lighter in weight and has a lower production cost.

[0031] Embodiment 2:

[0032] The present embodiment provides a duct fan, comprising a fan volute, a forward centrifugal fan wheel 100 and a motor. A cavity is arranged in the middle of the fan volute, and air inlets are arranged on both end surfaces of the fan volute. The air inlets are connected to the cavity. The forward centrifugal fan wheel 100 is installed in the cavity. The rotating shaft of the motor extends into the cavity and is connected to the shaft core 4 of the forward centrifugal fan wheel 100. It is characterized in that: the forward centrifugal fan wheel 100 is the forward centrifugal fan wheel described in Example 1.

[0033] By improving the structure of the forward centrifugal wind wheel 100, the noise of the medium-wind tube blower is reduced, the efficiency is increased, and the production cost is reduced.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A forward centrifugal wind wheel, comprising a wheel disc (1) located in the middle, a first wind wheel assembly (2) and a second wind wheel assembly (3) are respectively arranged on both sides of the wheel disc (1), the first wind wheel assembly (2) comprises a plurality of first blades (21) and a first impeller ring (22) connecting the ends of each first blade (21), the second wind wheel assembly (3) comprises a plurality of second blades (31) and a second impeller ring (32) connecting the ends of each second blade (31), an axis core (4) is arranged at the center of the wheel disc (1), and the characteristics are as follows: A through hole (11) is provided at the center of the wheel disc (1), and the shaft core (4) is located in the through hole (11). A plurality of first guide pieces (12) and a plurality of second guide pieces (13) are extended from the inner wall of the through hole (11) toward the first wind wheel assembly (2) and the second wind wheel assembly (3), respectively. The ends of the first guide pieces (12) and the ends of the second guide pieces (13) are respectively connected to the outer side surface of the shaft core (4). The first guide piece (12) is provided with a first inclined guide surface (121) inclined to the surface of the wheel disc (1), and the second guide piece (13) is provided with a second inclined guide surface (131) inclined to the surface of the wheel disc (1).

2. A forward centrifugal wind wheel according to claim 1, characterized in that: The first guide piece (12) and the second guide piece (13) are distributed at intervals on the outer circumference of the shaft core (4).

3. A forward centrifugal impeller according to claim 2, characterized in that: The first guide piece (12) and the second guide piece (13) are both provided with reinforcing ribs (14) on a side facing the shaft core (4).

4. A forward centrifugal wind wheel according to claim 3, characterized in that: The first guide piece (12) and the second guide piece (13) are respectively connected to two ends of the shaft core (4).

5. A forward centrifugal wind wheel according to any one of claims 2 to 4, characterized in that: The widths of the first guide piece (12) and the second guide piece (13) gradually increase from the shaft core (4) toward the wheel disc (1).

6. A forward centrifugal wind wheel according to claim 5, characterized in that: The number of the first guide plates (12) and the number of the second guide plates (13) are both five.

7. A duct fan, comprising a fan volute, a forward centrifugal fan wheel (100) and a motor, wherein a cavity is arranged in the middle of the fan volute, air inlets are arranged at both end surfaces of the fan volute, the air inlets are connected with the cavity, the forward centrifugal fan wheel (100) is installed in the cavity, the rotating shaft of the motor extends into the cavity and is connected with the shaft core (4) of the forward centrifugal fan wheel (100), characterized in that: The forward centrifugal wind wheel (100) is the forward centrifugal wind wheel according to any one of claims 1 to 6.

Images