Double-air-outlet centrifugal fan

Abstract

The utility model relates to the field of centrifugal fans, and discloses a double-air-outlet centrifugal fan which comprises a machine shell, a first impeller, a second impeller and a motor, the motor is simultaneously connected with and drives the first impeller and the second impeller to rotate, the machine shell comprises a first air outlet, a second air outlet and a first air inlet, the first impeller is communicated with the first air outlet, and the second impeller is communicated with the second air inlet. The second impeller communicates with the second air outlet, and the first air inlet communicates with the first air outlet and the second air outlet at the same time. The two different impellers are driven by the motor at the same time and communicated with the different air outlets respectively, so that the first air outlet outputs large air volume and low air pressure, the second air outlet outputs small air volume and high air pressure, and two airflow working conditions with different air volumes and air pressures can be generated at the same time. The design has the characteristics of compact structure, energy conservation, high efficiency, strong multifunctionality and the like, and is particularly suitable for ship ventilation systems, air-conditioning cooling systems and other scenes.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal fan technical field, specifically, relate to a double air outlet centrifugal fan. BACKGROUND

[0002] Centrifugal fan is relied on the input mechanical energy, improves the gas pressure and sends the gas machine. Centrifugal fan is widely used in ventilation, cooling, combustion support scene. The traditional centrifugal fan usually adopts the design of single motor drive single impeller, can only provide single air volume and air pressure output. However, many space positions are nervous, but also need to meet multiple airflow condition requirements simultaneously, for example, cabin ventilation (large air volume, low air pressure) and equipment cooling (small air volume, high air pressure) in ship system. To meet these needs, usually need to install multiple fans, resulting in large equipment space occupation, high energy consumption, complex maintenance.

[0003] In the prior art, although there is a double-impeller centrifugal fan design, but multiple adopt the structure of sharing a casing, cannot realize independent airflow control, and is difficult to adapt to narrow space and diversified working condition requirements. Therefore, a new type of centrifugal fan design is urgently needed, which can realize double-impeller independent operation under single motor driving, while providing different air volume and air pressure output, to meet the diversified needs of narrow space heating and ventilation system. SUMMARY

[0004] To solve at least one of the above problems, the utility model provides a double air outlet centrifugal fan first, including casing, first impeller, second impeller and motor, the motor is connected and drives the first impeller and the second impeller rotation simultaneously, the casing includes first air outlet, second air outlet and first air inlet, the first impeller is communicated the first air outlet, the second impeller is communicated the second air outlet, the first air inlet is communicated the first air outlet and the second air outlet simultaneously.

[0005] Optionally, the casing includes first air cavity and second air cavity that are communicated with each other, the first air inlet and the first air outlet are communicated with the first air cavity, the second air outlet is communicated with the second air cavity, the first impeller is contained in the first air cavity, and the second impeller is contained in the second air cavity.

[0006] Optionally, the first air inlet and the first impeller are connected with an air inlet cover, the air inlet cover is contained in the first air cavity, and the air inlet cover is used to separate the inlet air flow and the outlet air flow in the first air cavity.

[0007] Optionally, a partition plate is arranged between the first air cavity and the second air cavity, and a second air inlet is arranged on the partition plate, the second air inlet being used for connecting the first air cavity and the second air cavity, the first impeller and the partition plate are arranged at intervals and form a channel for gas flow between the first impeller and the partition plate, so that the gas in the first air cavity flows through the channel and enters the second air inlet.

[0008] Optionally, a plurality of guide vanes are arranged on the partition plate, the guide vanes being arranged at intervals in a circumferential direction of the second air inlet, and the guide vanes are used for guiding part of the gas flow in the first air cavity to the second air inlet.

[0009] Optionally, a disc silencer is connected to the shell, the disc silencer and the first air inlet are coaxially arranged and leave a channel for gas flow between the disc silencer and the first air inlet, and the disc silencer is used for eliminating the noise of the first air inlet.

[0010] Optionally, a frequency converter is further included, the frequency converter is electrically connected to the motor, and the frequency converter is used for adjusting the rotating speed of the motor to realize overall control of the air volume.

[0011] Optionally, an adjusting valve is arranged on each of the first air outlet and the second air outlet, and the adjusting valve is used for controlling the air volume and the air pressure.

[0012] Optionally, the first impeller includes a plurality of first vanes, the second impeller includes a plurality of second vanes, the width of the first vanes is greater than the width of the second vanes, and the number of the first vanes is less than the number of the second vanes, so that the air volume generated by the first impeller is greater than the air volume generated by the second impeller.

[0013] Optionally, the first vanes are backward vanes, and the second vanes are radial vanes or forward vanes, so that the air pressure generated by the first impeller is less than the air pressure generated by the second impeller.

[0014] Compared with the prior art, the double-outlet centrifugal fan in the utility model simultaneously drives two different impellers by one motor, the two impellers are connected to different air outlets, the first air outlet outputs large air volume and low air pressure, the second air outlet outputs small air volume and high air pressure, and two airflow working conditions with different air volume and air pressure can be simultaneously generated. The design has the characteristics of compact structure, energy saving and high efficiency, strong multifunction, and is particularly suitable for scenes such as ship ventilation systems and air conditioning cooling systems. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a structural diagram of a double-outlet centrifugal fan according to an embodiment of the utility model;

[0016] Figure 2A sectional view of a double-outlet centrifugal fan according to an embodiment of the present application;

[0017] Figure 3 A Figure 2 An enlarged view of the middle A part;

[0018] Figure 4 A structure diagram of the first blade and the guide blade according to an embodiment of the present application;

[0019] Figure 5 A structure diagram of the second blade according to an embodiment of the present application;

[0020] Figure 6 A structure diagram of the partition plate according to an embodiment of the present application.

[0021] Explanation of reference signs:

[0022] 1, a casing; 11, a first air outlet; 12, a second air outlet; 13, a first air inlet; 14, a first air cavity; 15, a second air cavity; 16, an air inlet cover; 17, a partition plate; 171, a second air inlet; 172, a guide blade; 2, a motor; 3, a first impeller; 31, a first blade; 4, a second impeller; 41, a second blade; 5, a disc silencer. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0024] An embodiment of the present application provides a double-outlet centrifugal fan, which combines Figures 1-6 as shown, comprising a casing 1, a first impeller 3, a second impeller 4 and a motor 2, the motor 2 is connected and drives the first impeller 3 and the second impeller 4 to rotate at the same time, the casing 1 comprises a first air outlet 11, a second air outlet 12 and a first air inlet 13, the first air outlet 11 is communicated with the first impeller 3, the second air outlet 12 is communicated with the second impeller 4, and the first air inlet 13 is communicated with the first air outlet 11 and the second air outlet 12 at the same time.

[0025] As Figure 1 shown in the present embodiment, the shape of the casing 1 is similar to a snail shell, and the airflow is guided by using a spiral shape, the first air outlet 11 is arranged at the outlet position of the snail shell, and the first air inlet 13 is arranged at the side wall position of the snail shell. The first impeller 3, the second impeller 4 and the motor 2 are coaxially arranged.

[0026] The double-outlet centrifugal fan in the utility model, through one motor 2 simultaneously driving two different impellers, two impellers respectively intercommunicate different air outlets, make first air outlet 11 output large air volume, low air pressure, second air outlet 12 output small air volume, high air pressure, can simultaneously produce two airflow working conditions of different air volume and air pressure, the design has the characteristics such as compact structure, energy saving and high efficiency, multi-functionality, especially suitable for ship ventilation system, air conditioning cooling system and the like scene.

[0027] Optionally, the shell 1 includes the first air cavity 14 and the second air cavity 15 which are interconnected, the first air inlet 13 and the first air outlet 11 are both communicated with the first air cavity 14, the second air outlet 12 is communicated with the second air cavity 15, the first impeller 3 is contained in the first air cavity 14, and the second impeller 4 is contained in the second air cavity 15.

[0028] As shown in the drawings, Figure 2 In the embodiment, the first air cavity 14 is close to the first air outlet 11, the second air cavity 15 is close to the motor 2, the first air cavity 14 and the second air cavity 15 are distributed along the axial direction of the shell 1, and both utilize the spiral shape of the shell 1 to guide airflow.

[0029] Optionally, the first air inlet 13 and the first impeller 3 are connected with the air inlet cover 16, the air inlet cover 16 is contained in the first air cavity 14, and the air inlet cover 16 is used for separating the inlet air flow and the outlet air flow in the first air cavity 14.

[0030] As shown in the drawings, Figure 2 In the embodiment, the air inlet cover 16 guides the air in the first air inlet 13 into the first impeller 3, when the motor 2 drives the first impeller 3 to rotate, the first impeller 3 does work on the air, the gas enters the impeller center from the air inlet of the first impeller 3, and is radially thrown to the edge of the first impeller 3 under the action of centrifugal force.

[0031] Optionally, the first air cavity 14 and the second air cavity 15 are provided with the partition plate 17, the second air inlet 171 is arranged on the partition plate 17, the second air inlet 171 is used for intercommunicating the first air cavity 14 and the second air cavity 15, the first impeller 3 and the partition plate 17 are arranged at intervals and form a channel for gas flow between the partition plate 17, so that the gas in the first air cavity 14 flows through the channel and enters the second air inlet 171.

[0032] As shown in the drawings, Figure 3 , 4As shown in Figure 6, in this embodiment, the partition plate 17 is used to separate the first air chamber 14 and the second air chamber 15. The diameter of the second air inlet 171 is smaller than the diameter of the first impeller 3. This arrangement allows part of the airflow in the first air chamber 14 to be supplied to the second air chamber 15 without affecting the air outlet of the first air chamber 14.

[0033] Optionally, the partition plate 17 is provided with a plurality of guide vanes 172, which are distributed circumferentially along the second air inlet 171. The guide vanes 172 are used to guide part of the airflow in the first air cavity 14 to the second air inlet 171.

[0034] like Figure 6 As shown, in this embodiment, there are eight guide vanes 172, and the guide vanes 172 extend radially along the second air inlet 171.

[0035] like Figure 1 As shown, optionally, a disc silencer 5 is connected to the outside of the housing 1. The disc silencer 5 is coaxially arranged with the first air inlet 13 and has a channel for gas flow between it and the first air inlet 13. The disc silencer 5 is used to eliminate the noise of the first air inlet 13.

[0036] Optionally, it also includes a frequency converter (not shown), which is electrically connected to the motor 2 and is used to adjust the speed of the motor 2 to achieve overall control of the air volume.

[0037] Optionally, both the first air outlet 11 and the second air outlet 12 are equipped with regulating valves (not shown), which are used to control the air volume and air pressure.

[0038] Optionally, the first impeller 3 includes a plurality of first blades 31, and the second impeller 4 includes a plurality of second blades 41. The width of the first blades 31 is greater than the width of the second blades 41, and the number of the first blades 31 is less than the number of the second blades 41, so that the air volume generated by the first impeller 3 is greater than the air volume generated by the second impeller 4.

[0039] like Figure 4 and 5 As shown, in this embodiment, there are ten first blades 31 and sixteen second blades 41. The width of the first blades 31 is larger, which generates a large air volume and low air pressure. The width of the second blades 41 is smaller, which generates a small air volume and high air pressure.

[0040] Optionally, the first blade 31 is a backward-curved blade, and the second blade 41 is a radial blade or a forward-curved blade, so that the wind pressure generated by the first impeller 3 is less than the wind pressure generated by the second impeller 4.

[0041] As Figure 4 and 5 In the present embodiment, the shape of the blades is divided into forward type, backward type or radial type. The forward type blade has small air volume and high air pressure; the backward type blade has large air volume and low air pressure; the air volume and air pressure of the radial type blade are between those of the forward type blade and the backward type blade.

[0042] Such arrangement can make the first air outlet 11 output large air volume and low air pressure, and the second air outlet 12 output small air volume and high air pressure. In the ship ventilation system, the first air outlet 11 is suitable for cabin ventilation, and the second air outlet 12 is suitable for local exhaust. In the air conditioning and cooling system, the first air outlet 11 is suitable for cabin air supply, and the second air outlet 12 is suitable for cooling equipment.

[0043] The present application has the following technical advantages:

[0044] Space saving: single motor 2 drives double impellers, reducing the occupied space of the equipment, suitable for narrow space environment.

[0045] Energy saving and high efficiency: flexible adjustment of the working conditions of the two air outlets according to the demand, avoiding energy waste.

[0046] Multifunctionality: simultaneously meeting various air flow requirements, reducing the number of equipment.

[0047] Simplified maintenance: sharing of motor 2 and casing 1, reducing the maintenance complexity.

[0048] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential” and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present disclosure.

[0049] In addition, the terms “first”, “second” and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with “first”, “second” and the like can explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of “plurality” is at least two, such as two, three, etc., unless otherwise specifically limited.

[0050] In the present disclosure, unless specifically defined otherwise and limited, the terms "mount", "connect", "connection", "fixed", and the like, should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0051] In the present disclosure, unless specifically defined otherwise and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0052] The technical features of the above embodiments can be combined in any way. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present disclosure.

[0053] The above embodiments only express several implementation manners of the present disclosure, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be pointed out that for those skilled in the art, without departing from the utility model concept of the present disclosure, some modifications and improvements can be made, which are all within the protection scope of the present disclosure.

Claims

1. A dual-outlet centrifugal fan, characterized in that, The device includes a housing (1), a first impeller (3), a second impeller (4), and a motor (2). The motor (2) is connected to and drives the first impeller (3) and the second impeller (4) to rotate. The housing (1) includes a first air outlet (11), a second air outlet (12), and a first air inlet (13). The first impeller (3) is connected to the first air outlet (11), the second impeller (4) is connected to the second air outlet (12), and the first air inlet (13) is connected to both the first air outlet (11) and the second air outlet (12).

2. The dual-outlet centrifugal fan according to claim 1, characterized in that, The housing (1) includes a first air chamber (14) and a second air chamber (15) that are interconnected. The first air inlet (13) and the first air outlet (11) are both connected to the first air chamber (14), and the second air outlet (12) is connected to the second air chamber (15). The first impeller (3) is housed in the first air chamber (14), and the second impeller (4) is housed in the second air chamber (15).

3. The dual-outlet centrifugal fan according to claim 2, characterized in that, An air inlet shroud (16) is connected between the first air inlet (13) and the first impeller (3). The air inlet shroud (16) is housed in the first air cavity (14). The air inlet shroud (16) is used to separate the intake airflow and the exhaust airflow in the first air cavity (14).

4. The dual-outlet centrifugal fan according to claim 2, characterized in that, A partition plate (17) is provided between the first air chamber (14) and the second air chamber (15). The partition plate (17) is provided with a second air inlet (171). The second air inlet (171) is used to connect the first air chamber (14) and the second air chamber (15). The first impeller (3) and the partition plate (17) are spaced apart and form a channel for gas flow between them, so that the gas in the first air chamber (14) flows through the channel and enters the second air inlet (171).

5. The dual-outlet centrifugal fan according to claim 4, characterized in that, The partition plate (17) is provided with a plurality of guide vanes (172), which are distributed circumferentially along the second air inlet (171). The guide vanes (172) are used to guide part of the airflow in the first air cavity (14) to the second air inlet (171).

6. The dual-outlet centrifugal fan according to claim 1, characterized in that, The casing (1) is connected to a disc silencer (5). The disc silencer (5) and the first air inlet (13) are coaxially arranged and a channel for gas flow is left between them. The disc silencer (5) is used to eliminate the noise of the first air inlet (13).

7. The dual-outlet centrifugal fan according to claim 1, characterized in that, It also includes a frequency converter, which is electrically connected to the motor (2). The frequency converter is used to adjust the speed of the motor (2) to achieve overall control of the air volume.

8. The dual-outlet centrifugal fan according to claim 1, characterized in that, Both the first air outlet (11) and the second air outlet (12) are equipped with regulating valves, which are used to control the air volume and air pressure.

9. The dual-outlet centrifugal fan according to any one of claims 1-8, characterized in that, The first impeller (3) includes a plurality of first blades (31), and the second impeller (4) includes a plurality of second blades (41). The width of the first blades (31) is greater than the width of the second blades (41), and the number of the first blades (31) is less than the number of the second blades (41), so that the air volume generated by the first impeller (3) is greater than the air volume generated by the second impeller (4).

10. The dual-outlet centrifugal fan according to claim 9, characterized in that, The first blade (31) is a backward-curved blade, and the second blade (41) is a radial blade or a forward-curved blade, so that the wind pressure generated by the first impeller (3) is less than the wind pressure generated by the second impeller (4).

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