Cross-flow fan and air conditioner

Abstract

The application discloses a cross-flow fan and an air conditioner, and relates to the technical field of air conditioners, in particular to a cross-flow fan and an air conditioner. The cross-flow fan comprises a rotating mechanism, a left fixed disc, a volute tongue plate, an air duct profile plate, a cross-flow impeller and a right fixed disc. The rotating mechanism comprises a fan motor, a first rotating disc and a second rotating disc. A motor shaft of the fan motor penetrates through the left fixed disc and the first rotating disc, and is connected with one end of a rotating shaft of the cross-flow impeller. The other end of the rotating shaft of the cross-flow impeller is connected through the second rotating disc and the right fixed disc. Two ends of the volute tongue plate are respectively connected with the first rotating disc and the second rotating disc, and are rotatably arranged outside the cross-flow impeller. Two ends of the air duct profile plate are respectively connected with the left fixed disc and the right fixed disc. The position of the volute tongue plate in the cross-flow fan is adjusted through rotation, the design of improving the air outlet speed at low rotating speed of the fan and the design of reducing the air outlet speed at high rotating speed of the fan are realized, and the heating effect is improved and the noise of the air conditioner is reduced.

Description

Technical Field

[0001] This utility model relates to the field of air conditioners, specifically to a cross-flow fan and an air conditioner. Background Technology

[0002] Most mainstream split-type wall-mounted air conditioner indoor units on the market currently use cross-flow fan systems. These typically employ a fixed duct profile and a volute to form the air outlet channel, while the air conditioning unit's heat exchanger and other structural components form the air inlet channel. The cross-flow impeller is positioned between the inlet and outlet channels. During operation, indoor air is drawn radially into the cross-flow impeller from outside the unit by the impeller's action, and then, under the rotation of the impeller, is blown radially towards the outlet channel from the other side, ultimately being discharged outside the unit, thus forming an air circulation system.

[0003] Because hot air rises, air conditioners are generally designed with their air outlets at the bottom to improve heating efficiency. This bottom-discharge design directs hot air towards the ground, enhancing heat exchange. However, with bottom-discharge, the airflow is directed downwards. At low speeds, the cross-flow fan has low static pressure, resulting in low airflow velocity and higher outlet temperature. This causes hot air to rise and accumulate near the unit, leading to localized high temperatures. The air conditioner's temperature sensing system may then misinterpret this as a high temperature and shut down. This malfunction causes the heating system to stop prematurely, failing to achieve the desired heating effect and resulting in poor comfort. Conversely, at high speeds, the cross-flow fan has high static pressure, resulting in high airflow velocity and noise, directly impacting comfort. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a cross-flow fan and an air conditioner.

[0005] The present invention adopts the following technical solution.

[0006] The first aspect of this utility model discloses a cross-flow fan, comprising: a rotating mechanism, a left fixed plate, a volute plate, a duct-shaped panel, a cross-flow impeller, and a right fixed plate;

[0007] The rotating mechanism includes: a fan motor, a first turntable, and a second turntable; the motor shaft of the fan motor passes through the left fixed plate and the first turntable, and is connected to one end of the rotating shaft of the cross-flow impeller; the other end of the rotating shaft of the cross-flow impeller passes through the second turntable and is connected to the right fixed plate; the two ends of the volute plate are respectively connected to the first turntable and the second turntable, and are rotatably disposed on the outside of the cross-flow impeller; the two ends of the duct-shaped panel are respectively connected to the left fixed plate and the right fixed plate.

[0008] Preferably, a fan blade through hole is provided between the first turntable and the second turntable, and both ends of the cross-flow impeller rotating shaft are installed in the fan blade through hole.

[0009] Preferably, a meshing gear is provided on the outer side of the fan blade through hole, and the meshing gear is connected to both ends of the volute plate.

[0010] Preferably, the rotating mechanism further includes: a driving fan and a gear; the meshing gear and the gear are meshed and fixed, the gear is connected to the driving motor and rotates under the drive of the driving motor, thereby rotating the meshing gear and rotating the volute tongue plate.

[0011] Preferably, the two drive motors are fixed on the left and right fixed plates respectively, and the gears are connected to the motor shafts of the drive motors.

[0012] Preferably, the left fixing plate includes a first left fixing plate and a second left fixing plate, and the fan motor is fixed to the left fixing plate by fasteners, with the first left fixing plate and the second left fixing plate each covering half of the fan motor.

[0013] Preferably, the right fixed disk includes a first right fixed disk and a second right fixed disk, and the rotating shaft of the cross-flow impeller is wrapped and fixed by the first right fixed disk and the second right fixed disk.

[0014] The second aspect of this utility model discloses an air conditioner, including the cross-flow fan described in the first aspect;

[0015] The air conditioner also includes a housing, and the fan motor, left fixed plate, air duct type panel, cross-flow impeller and right fixed plate are fixed structures relative to the unit housing.

[0016] Preferably, the air conditioner has an upper air inlet, an air inlet channel, an air outlet channel, and a lower air inlet. Air is drawn in from outside the unit through the upper air inlet and the air inlet channel by the action of the cross-flow impeller. It is drawn into the interior of the cross-flow impeller along the side radial direction. Under the rotation of the cross-flow impeller, it is blown radially along the other side of the cross-flow impeller towards the air outlet channel and discharged outside the unit through the lower air inlet, thus forming an air circulation.

[0017] Preferably, the air outlet channel is composed of a duct-shaped panel and a volute plate. The volute plate changes position through the rotating mechanism, thereby changing the distance between the volute plate and the duct-shaped panel, adjusting the area of ​​the air outlet channel and the air inlet channel, and thus changing the air intake ratio of the cross-flow fan.

[0018] Compared with the prior art, the beneficial effects of this utility model include at least the following:

[0019] This invention adjusts the position of the volute tongue plate in the cross-flow fan by rotating it, thereby changing the position of the volute tongue plate and the air duct panel. This adjusts the air inlet and outlet areas of the fan, altering the air inlet ratio of the cross-flow fan. This design increases the outlet air velocity at low fan speeds and decreases the outlet air velocity at high fan speeds, improving the heating effect at low speeds, making the air conditioner more energy-efficient. It also achieves low-speed heating and air delivery with low noise and superior comfort. Precise control ensures continuous heating and reduces noise from high-speed air conditioners. Attached Figure Description

[0020] Figure 1 This is an overall structural diagram of the fan component of this utility model;

[0021] Figure 2 This is an exploded view of the fan component of this utility model;

[0022] Figure 3 This is a diagram of the turntable of this utility model;

[0023] Figure 4 This is a schematic diagram of the air conditioner structure of this utility model;

[0024] In the diagram: 1. Fan motor; 2. Drive fan; 3. Gear; 4. First turntable; 5. First left fixed plate; 6. Second left fixed plate; 7. Volute tongue plate; 8. Air duct type panel; 9. Cross-flow impeller; 10. Second turntable; 11. First right fixed plate; 12. Second right fixed plate; 13. Meshing gear; 14. Fan blade through hole; 15. Housing; 16. Heat exchanger; 17. Air inlet channel; 18. Cross-flow fan; 19. Air outlet channel; 20. Upper air outlet; 21. Lower air outlet; 22. Volute tongue plate position one; 23. Volute tongue plate position two. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The embodiments described in this application are merely some embodiments of this utility model, and not all embodiments. Based on the spirit of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] like Figure 1-2 As shown, Embodiment 1 of this utility model discloses a cross-flow fan, including: a rotating mechanism, a left fixed plate, a volute plate 7, a duct-shaped panel 8, a cross-flow impeller 9, and a right fixed plate.

[0027] The rotating mechanism includes: a fan motor 1, a first turntable 4, and a second turntable 10.

[0028] Specifically, the left fixed plate includes a first left fixed plate 5 and a second left fixed plate 6, and the right fixed plate includes a first right fixed plate 11 and a second right fixed plate 12. The fan motor 1 is fixed to the left fixed plate by fasteners. The first left fixed plate 5 and the second left fixed plate 6 each enclose half of the fan motor 1. The motor shaft of the fan motor 1 passes through the left fixed plate and the first turntable 4, connecting one end to the rotating shaft of the cross-flow impeller 9. The other end of the rotating shaft of the cross-flow impeller 9 passes through the second turntable 10 and connects to the right fixed plate. Preferably, the rotating shaft of the cross-flow impeller 9 is enclosed and fixed by the first right fixed plate 11 and the second right fixed plate 12. The fan motor 1 is used to drive the cross-flow impeller 9 to rotate.

[0029] like Figure 3 As shown, the middle of the first turntable 4 and the second turntable 10 is the fan blade through hole 14, which is used to install the cross-flow impeller 9. Both the first turntable 4 and the second turntable 10 are provided with meshing gears 13, which are connected to both ends of the volute 7 and are the transmission mechanism for rotating the volute 7.

[0030] The rotating mechanism further includes: a drive motor 2 and a gear 3; the meshing gear 13 and the gear 3 are meshed and fixed, the gear 3 is connected to the drive motor shaft and rotates under the drive of the drive motor 2, thereby rotating the meshing gear 13 to realize the rotation of the volute tongue plate 7.

[0031] Specifically, the cross-flow impeller 9 can rotate around the fan motor shaft under the drive of the fan motor 1, the gear 3 can rotate around the drive motor shaft under the drive of the drive motor 2, and the turntable and the volute plate 7 fixed on the turntable at both ends are assembled by the meshing gear 13 of the turntable itself and the external gear 3. The turntable can rotate around the shaft of the turntable fan blade through hole 14 under the drive of the external gear 3.

[0032] The duct-shaped panel 8 is disposed on the outside of the cross-flow impeller 9, and the two ends of the duct-shaped panel 8 are connected to the left fixed plate and the right fixed plate, respectively.

[0033] In a preferred but non-limiting embodiment of this utility model, the volute tongue plate 7, the first turntable 4, and the second turntable 5 are connected by fasteners. After connection, they can be considered as a single structure, and there is no tooth meshing relationship. That is, the drive motor 2 can directly drive the turntable to rotate the volute tongue plate 7.

[0034] More preferably, the drive motor may be a stepper motor.

[0035] like Figure 4 As shown, Embodiment 2 of this utility model discloses an air conditioner, including the cross-flow fan 18 described in Embodiment 1, and the air conditioner also includes a housing 15 and a heat exchanger 16;

[0036] The fan motor 1, left fixed plate, drive motor 2, gear 3, air duct type panel 8, cross flow impeller 9 and right fixed plate are fixed material structures relative to the unit casing 15;

[0037] The air conditioner has an internal air duct, including an upper air inlet 20, an air inlet channel 17, an air outlet channel 19, and a lower air inlet 21. Specifically, the air outlet channel 19 is composed of an air duct panel 8 with an air duct profile and a volute plate 7 with a volute profile. When heating, the upper air inlet 20 serves as a return air inlet and the lower air inlet 21 serves as an air outlet.

[0038] Air is drawn in from outside the unit by the action of the cross-flow impeller 9 through the upper air inlet 20 and the air inlet channel 17, and is drawn into the interior of the cross-flow impeller 9 along the lateral radial direction. Then, under the action of the rotation of the cross-flow impeller 9, it is blown radially along the other side of the cross-flow impeller 9 towards the air outlet channel 19, and is discharged outside the unit through the lower air inlet 21, forming an air circulation.

[0039] The volute tongue plate 7 with the volute tongue profile is configured to be rotatable and change its assembly position. Through a rotation mechanism, the volute tongue plate 7, including the volute tongue profile, can be positioned at any position between volute tongue plate position one 22 and volute tongue plate position two 23. By changing the position of the volute tongue plate 7, the size of the air outlet and air inlet channels can be changed, thereby changing the air intake ratio of the cross-flow fan and adjusting it to meet the requirements of air conditioner wind speed and noise.

[0040] Specifically, when the air conditioner requires low-volume heating, the fan speed is low, the air outlet velocity is low, and the air delivery distance is short. By rotating and adjusting the volute 7 to position 23, the distance to the duct-type panel 8 is reduced, thus decreasing the air outlet area and increasing the air intake ratio. Simultaneously, the rotation of the volute 7 towards the air outlet also increases the suction area of ​​the cross-flow impeller 9 in the air intake channel, further increasing the air intake area and improving the air intake ratio. This increased air intake ratio raises the dynamic pressure at the air outlet, further increasing the air outlet velocity. This achieves the goal of increasing the air delivery distance and prevents hot air from easily rising and accumulating near the air conditioner during heating, which could lead to localized high temperatures and misjudgment by the air conditioner's temperature sensing system, causing it to shut down. This ensures continuous heating, improving heating efficiency and comfort.

[0041] Conversely, when the air conditioner requires high airflow for heating, the fan speed is high and the airflow velocity is high, resulting in high unit noise. By rotating and adjusting the volute 7 to position 22, the distance between it and the duct-type panel 8 is increased, thereby increasing the air outlet area and reducing the air intake ratio. Simultaneously, rotating the volute 7 away from the air outlet also reduces the suction area of ​​the cross-flow impeller 9 in the air intake channel, further reducing the air intake area and thus lowering the air intake ratio. This reduced air intake ratio lowers the dynamic pressure at the air outlet, further reducing the airflow velocity. Lower airflow velocity helps reduce airflow noise and improves the comfort of the air conditioner.

[0042] The air conditioner also includes a control system. When the unit control needs to change the size of the air outlet channel, the control system sends a command to drive the drive motor 2 to rotate. The drive motor 2 drives the gear 3 to rotate. The rotating gear 3 drives the turntable to rotate through the meshing gear 13. The rotating turntable drives the volute plate 7 installed on the turntable to rotate, thereby changing the size of the air outlet channel formed by the combination of the volute plate 7 and the air duct type panel 8, and simultaneously changing the size of the air inlet channel.

[0043] As shown above, a split-type rotary volute cross-flow fan and its heating comfort-oriented energy-saving air conditioner are proposed. By rotating and adjusting the position of the volute plate 7, the positions of the volute plate 7 and the duct-type panel 8 are changed, adjusting the air inlet and outlet areas of the fan, and altering the air intake ratio of the cross-flow fan 18. This achieves a design that increases the outlet air velocity at low fan speeds and decreases the outlet air velocity at high fan speeds. At low speeds, reducing the distance between the volute plate 7 and the duct-type panel 8 increases the dynamic pressure at the outlet, thereby increasing the outlet air velocity and increasing the air delivery distance, improving heating efficiency, and enhancing the comfort and energy-saving performance of the air conditioner. At high speeds, increasing the distance between the volute plate 7 and the duct-type panel 8 reduces the dynamic pressure at the outlet, decreasing the outlet air velocity and reducing noise, thus improving the overall comfort of the air conditioner.

[0044] Compared with the prior art, the beneficial effects of this utility model include at least the following:

[0045] This invention adjusts the position of the volute tongue plate in the cross-flow fan by rotating it, thereby changing the position of the volute tongue plate and the air duct panel. This adjusts the air inlet and outlet areas of the fan, altering the air inlet ratio of the cross-flow fan. This design increases the outlet air velocity at low fan speeds and decreases the outlet air velocity at high fan speeds, improving the heating effect at low speeds, making the air conditioner more energy-efficient. It also achieves low-speed heating and air delivery with low noise and superior comfort. Precise control ensures continuous heating and reduces noise from high-speed air conditioners.

[0046] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0048] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "a solution," "some solutions," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that solution or example is included in at least one solution or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same solution or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more solutions or examples.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A cross-flow fan, characterized in that: include: Rotating mechanism, left fixed plate, volute tongue plate (7), air duct type panel (8), cross-flow impeller (9) and right fixed plate; The rotating mechanism includes: a fan motor (1), a first turntable (4), and a second turntable (10); the motor shaft of the fan motor (1) passes through the left fixed plate and the first turntable (4) and is connected to one end of the rotating shaft of the cross-flow impeller (9); the other end of the rotating shaft of the cross-flow impeller (9) passes through the second turntable (10) and is connected to the right fixed plate; the two ends of the volute plate (7) are respectively connected to the first turntable (4) and the second turntable (10) and are rotatably disposed on the outside of the cross-flow impeller (9); the two ends of the duct-type panel (8) are respectively connected to the left fixed plate and the right fixed plate.

2. The cross-flow fan according to claim 1, characterized in that: A fan blade through hole (14) is provided in the middle of the first turntable (4) and the second turntable (10), and the two ends of the rotating shaft of the cross-flow impeller (9) are installed in the fan blade through hole (14).

3. A cross-flow fan according to claim 2, characterized in that: A meshing gear (13) is provided on the outside of the fan blade through hole (14), and the meshing gear (13) is connected to both ends of the volute tongue plate (7).

4. A cross-flow fan according to claim 3, characterized in that: The rotating mechanism further includes a drive motor (2) and a gear (3); the meshing gear (13) and the gear (3) are meshed and fixed, the gear (3) is connected to the drive motor (2) and rotates under the drive of the drive motor (2), thereby rotating the meshing gear (13) to rotate the worm tongue plate (7).

5. A cross-flow fan according to claim 4, characterized in that: The two drive motors (2) are fixed on the left and right fixed plates respectively, and the gear (3) is connected to the motor shaft of the drive motor (2).

6. A cross-flow fan according to claim 1, characterized in that: The left fixing plate includes a first left fixing plate (5) and a second left fixing plate (6). The fan motor (1) is fixed on the left fixing plate by fasteners. The first left fixing plate (5) and the second left fixing plate (6) each cover half of the fan motor (1).

7. A cross-flow fan according to claim 1, characterized in that: The right fixed disk includes a first right fixed disk (11) and a second right fixed disk (12), and the rotating shaft of the cross-flow impeller (9) is wrapped and fixed by the first right fixed disk (11) and the second right fixed disk (12).

8. An air conditioner, characterized in that, Includes the cross-flow fan according to any one of claims 1-7; The air conditioner also includes a housing (15), and the fan motor (1), left fixed plate, air duct type panel (8), cross flow impeller (9) and right fixed plate are fixed relative to the unit housing (15).

9. An air conditioner according to claim 8, characterized in that, The air conditioner has an upper air inlet (20), an air inlet channel (17), an air outlet channel (19), and a lower air inlet (21). Air is drawn in from outside the unit by the action of the cross-flow impeller (9) through the upper air inlet (20) and the air inlet channel (17), and is drawn into the interior of the cross-flow impeller (9) along the side radial direction. Under the rotation of the cross-flow impeller (9), it is blown radially along the other side of the cross-flow impeller (9) towards the air outlet channel (19), and is discharged outside the unit through the lower air inlet (21), forming an air circulation.

10. An air conditioner according to claim 9, characterized in that, The air outlet channel (19) is composed of the air duct type panel (8) and the volute tongue plate (7). The volute tongue plate (7) changes its position through the rotating mechanism, thereby changing the distance between the volute tongue plate (7) and the air duct type panel (8), adjusting the area of ​​the air outlet channel (19) and the air inlet channel (17), and thus changing the air inlet ratio of the cross-flow fan.

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