Spiral case and hoist

Abstract

This utility model relates to the field of hoisting machine technology, and provides a volute and a hoisting machine. The volute includes a volute plate and a volute tongue plate, which are arranged opposite to each other, forming a volute space. A cross-flow fan is installed in the volute space. The air inlet end of the volute plate and the air inlet end of the volute tongue plate are spaced apart to form a volute air inlet, which is opposite to the main air inlet of the hoisting machine. The air outlet end of the volute plate and the air outlet end of the volute tongue plate are spaced apart to form a volute air outlet, which is connected to the main air outlet of the hoisting machine. The air inlet area of ​​the volute air inlet is adjustable. In this way, the air inlet area of ​​the volute can be adjusted according to the air outlet resistance of the main air outlet of the hoist. When the air outlet resistance of the main air outlet increases, the air inlet area of ​​the volute can be appropriately reduced so that the air inlet flow of the volute matches the air outlet flow of the main air outlet. This avoids fluctuations such as airflow backflow or oscillation caused by excessive air intake and inability to be discharged smoothly, thereby alleviating the surge problem.

Description

Technical Field

[0001] This utility model relates to the field of hoisting machine technology, and in particular to a volute and a hoisting machine. Background Technology

[0002] The air conditioner is a core component of an air conditioning system. It draws in outside air through the air inlet using a built-in fan, pressurizes and accelerates it after being guided by the volute, then exchanges heat through the heat exchanger, and finally delivers the regulated air to the target space through the air outlet to achieve the functions of cooling, heating or ventilation, and maintain the temperature, humidity and air quality of the target space.

[0003] Currently, centrifugal fans are commonly used in hoisting machines. However, centrifugal fans and their casings result in a larger vertical dimension of the hoisting machine (the vertical dimension of the hoisting machine is perpendicular to the axis of the centrifugal fan). Some related technologies use cross-flow fans instead of centrifugal fans, but cross-flow fans have weaker pressure resistance, and surge problems can occur when the resistance at the hoisting machine's outlet is high.

[0004] Therefore, how to solve the surge problem in the hoisting machine using a cross-flow fan has become an important technical problem for those skilled in the art to solve. Utility Model Content

[0005] This utility model provides a volute and a drop hoist to solve the surge defect in drop hoists using cross-flow fans in related technologies.

[0006] This utility model provides a volute, comprising:

[0007] A volute plate and a volute tongue plate are arranged opposite to each other, forming a volute space between the volute plate and the volute tongue plate. The volute space is suitable for accommodating a cross-flow fan. There is a gap between the air inlet end of the volute plate and the air inlet end of the volute tongue plate to form a volute air inlet. The volute air inlet is suitable to be opposite to the main air inlet of the hoist where the volute is located. There is a gap between the air outlet end of the volute plate and the air outlet end of the volute tongue plate to form a volute air outlet. The volute air outlet is suitable to be connected to the main air outlet of the hoist.

[0008] The air inlet area of ​​the volute air inlet is adjustable.

[0009] With this configuration, when the cross-flow fan is running, the air inlet area of ​​the volute can be adjusted according to the air outlet resistance of the main air outlet of the hoist. When the air outlet resistance of the main air outlet increases, the air inlet area of ​​the volute can be appropriately reduced to match the air inlet flow of the volute with the air outlet flow of the main air outlet. This avoids fluctuations such as airflow backflow or oscillation caused by excessive air intake that cannot be smoothly discharged, thereby alleviating the surge problem and solving the surge problem that exists in hoisting machines using cross-flow fans in related technologies.

[0010] According to the present invention, a volute shell is provided, the volute shell plate comprising:

[0011] The fixed plate is fixed relative to the volute tongue plate;

[0012] A movable plate is disposed at one end of the fixed plate near the main air inlet of the hoist. The movable plate is adapted to reciprocate relative to the fixed plate, and the axis of rotation of the movable plate relative to the fixed plate is parallel to the axis of the cross-flow fan.

[0013] A driving element adapted to drive the movable plate portion relative to the fixed plate portion.

[0014] This configuration allows for adjustment of the air intake area of ​​the volute casing by rotating the movable plate relative to the fixed plate. By controlling the rotation angle of the movable plate relative to the fixed plate, the air intake area of ​​the volute casing can be controlled as needed.

[0015] According to the present invention, a volute is provided in which the movable plate is adapted to rotate between a first limit position and a second limit position;

[0016] At the first extreme position, the end of the movable plate near the main air inlet of the hoist is flush with the end of the fixed plate near the main air inlet of the hoist;

[0017] At the second extreme position, the end of the movable plate portion away from the main air inlet of the hoisting machine and the end of the fixed plate portion near the main air inlet of the hoisting machine form a continuous curved surface.

[0018] With this configuration, the air intake area of ​​the volute is maximized when the movable plate is rotated to its first extreme position, and minimized when the movable plate is rotated to its second extreme position. The volute air intake has a wide adjustment range.

[0019] According to the volute provided by this utility model, it also includes:

[0020] A pair of end plates are spaced apart at both ends of the volute plate and the volute tongue plate along the axial direction of the cross-flow fan. The end plates, the fixed plate and the volute tongue plate are fixedly connected, and the movable plate is rotatably connected to the end plates.

[0021] This configuration, where a pair of end plates, a volute plate, and a volute tongue plate enclose each other to form a volute space, prevents airflow leakage at both ends of the cross-flow fan, ensuring sufficient airflow at the volute outlet. The movable plate is rotatably connected to the end plates, and the end plates serve as supports for the movable plate.

[0022] According to the present invention, a volute is provided in which a pair of connecting rods are provided on the movable plate, and the pair of connecting rods are respectively located on the side of the pair of end plates that are far apart from each other;

[0023] One end of the connecting rod is fixedly connected to the movable plate, and the other end of the connecting rod is hinged to the end plate.

[0024] With this configuration, the movable plate and the end plate are rotatably connected by a pair of connecting rods. The structure is simple, and both ends of the movable plate are set on the end plate through connecting rods, so both ends of the movable plate are supported, which can improve the stability of the movable plate.

[0025] According to the volute provided by this utility model, it also includes:

[0026] An angle detection element is adapted to detect the rotation angle of the movable plate relative to the fixed plate. The angle detection element is electrically connected to a controller, which is adapted to control the rotation angle of the movable plate relative to the fixed plate based on the air outlet resistance of the main air outlet of the hoist.

[0027] This configuration links the rotation angle of the movable plate relative to the fixed plate to the air outlet resistance of the hoist's main air outlet. By controlling the rotation angle of the movable plate relative to the fixed plate based on the air outlet resistance of the hoist's main air outlet, the air inlet flow rate of the volute and the air outlet flow rate of the main air outlet are better matched, resulting in more precise control.

[0028] According to the present invention, a volute housing is provided, the driving component comprising:

[0029] An electric motor, the output shaft of which is connected to the movable plate portion in a transmission manner;

[0030] The angle detection element includes:

[0031] An encoder is disposed on the output shaft of the motor, the encoder being adapted to detect the rotation angle of the output shaft of the motor.

[0032] With this configuration, when the motor is running, the motor's output shaft can drive the movable plate to rotate relative to the end plate. The encoder can detect the rotation angle of the motor's output shaft, thereby determining the rotation angle of the movable plate relative to the fixed plate.

[0033] According to the present invention, a volute is provided in which the rotation axis of the movable plate relative to the fixed plate has a gap with the rotation axis of the cross-flow fan.

[0034] This arrangement facilitates the layout of the drive components and the power components of the cross-flow fan, and helps to avoid interference.

[0035] According to the present invention, a volute is provided at one end of the volute plate away from the main air inlet, and a volute tongue plate is provided at one end away from the main air inlet, and the volute diffuser and the volute tongue diffuser are arranged opposite to each other.

[0036] The distance between the volute diffuser and the volute tongue diffuser gradually increases in the direction away from the volute tongue plate, and the volute diffuser and the volute tongue diffuser extend to opposite ends of the heat exchanger of the hoist.

[0037] With this configuration, the volute diffuser and the volute tongue diffuser can guide the airflow so that the airflow flows orderly to the heat exchanger of the hoist.

[0038] This utility model also provides a hoisting machine, including the aforementioned volute.

[0039] The volute provided by this utility model includes a volute plate and a volute tongue plate, which are arranged opposite to each other, forming a volute space for housing a cross-flow fan. A gap exists between the air inlet end of the volute plate and the air inlet end of the volute tongue plate to form a volute air inlet, which is positioned opposite the main air inlet of the hoist. A gap exists between the air outlet end of the volute plate and the air outlet end of the volute tongue plate to form a volute air outlet, which connects to the main air outlet of the hoist. When the cross-flow fan is running, airflow enters the volute space through the main air inlet of the hoist and the volute air inlet, and is discharged through the volute air outlet and the main air outlet of the hoist. The air inlet area of ​​the volute air inlet is adjustable. With this configuration, when the cross-flow fan is running, the air inlet area of ​​the volute can be adjusted according to the air outlet resistance of the main air outlet of the hoist. When the air outlet resistance of the main air outlet increases, the air inlet area of ​​the volute can be appropriately reduced to match the air inlet flow of the volute with the air outlet flow of the main air outlet. This avoids fluctuations such as airflow backflow or oscillation caused by excessive air intake and inability to be discharged smoothly, thereby alleviating the surge problem and ensuring the stable operation of the hoist's air supply system. This solves the surge problem that exists in hoist systems using cross-flow fans in related technologies.

[0040] Furthermore, the hoist provided by this utility model has the same advantages as described above because it has the volute as described above. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the structure of the volute provided by this utility model when it is installed in the hoisting machine and the movable plate is in the second extreme position (the dotted line in the figure is the closed position of the air guide plate, not the solid structure).

[0043] Figure 2 This is a schematic diagram of the structure of the volute provided by this utility model when it is installed in the hoisting machine and the movable plate is in the first extreme position (the dotted line in the figure is the closed position of the air guide plate, not the solid structure).

[0044] Figure 3 This is a schematic diagram of the structure of the hoist provided by this utility model when the movable plate of the volute is in the second extreme position (part of the structure of the hoist's outer shell is hidden).

[0045] Figure 4 This is a schematic diagram of the structure of the hoist provided by this utility model when the movable plate of the volute is in the first extreme position (part of the structure of the hoist's outer shell is hidden).

[0046] Figure label:

[0047] 1. Volute tongue plate; 2. Cross-flow fan; 3. Main air inlet; 4. Fixed plate; 5. Movable plate; 6. Connecting rod; 7. Volute diffuser; 8. Volute tongue diffuser; 9. Heat exchanger; 10. Hoist housing; 11. Air guide plate; 12. Main air outlet. Detailed Implementation

[0048] 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. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0049] The following is combined Figures 1 to 4 This invention describes the volute casing.

[0050] like Figures 1 to 4 As shown, the volute provided in this embodiment of the present invention includes a volute plate and a volute tongue plate 1.

[0051] Specifically, the volute plate and the volute tongue plate 1 are arranged opposite to each other, and a volute space is formed between the volute plate and the volute tongue plate 1. The volute space is used to install the cross-flow fan 2.

[0052] There is a gap between the air inlet end of the volute plate and the air inlet end of the volute tongue plate 1 to form a volute air inlet, which is positioned opposite the main air inlet 3 of the hoist where the volute is located. An air inlet grille is provided at the main air inlet 3 of the hoist.

[0053] There is a gap between the air outlet end of the volute plate and the air outlet end of the volute tongue plate 1 to form a volute air outlet, which is used to connect to the main air outlet 12 of the hoist.

[0054] When the cross-flow fan 2 is running, the airflow enters the volute space through the main air inlet 3 of the hoist and the volute air inlet, and is discharged through the volute air outlet and the main air outlet 12 of the hoist.

[0055] The air intake area of ​​the volute air inlet is adjustable.

[0056] With this configuration, when the cross-flow fan 2 is running, the air inlet area of ​​the volute can be adjusted according to the air outlet resistance of the total air outlet 12 of the hoist. When the air outlet resistance of the total air outlet 12 increases, the air inlet area of ​​the volute can be appropriately reduced to match the air inlet flow of the volute with the air outlet flow of the total air outlet 12. This avoids fluctuations such as airflow backflow or oscillation caused by excessive air intake and inability to be discharged smoothly, thereby alleviating the surge problem and ensuring the stable operation of the hoist's air supply system. This solves the surge problem that exists in hoists using cross-flow fan 2 in related technologies.

[0057] It should be noted that the volute provided in this embodiment is suitable for use with the cross-flow fan 2, enabling the installation of the cross-flow fan 2 in the hoist and avoiding the problem of surge. The installation of the cross-flow fan 2 in the hoist helps to reduce the height of the hoist, achieving a thinner and lighter design.

[0058] In this embodiment of the utility model, the volute plate includes a fixed plate part 4, a movable plate part 5, and a driving component.

[0059] The fixed plate 4 is fixed relative to the volute plate 1, and the movable plate 5 is located at one end of the fixed plate 4 near the main air inlet 3 of the hoist. The movable plate 5 can reciprocate relative to the fixed plate 4, and the axis of rotation of the movable plate 5 relative to the fixed plate 4 is parallel to the axis of the cross-flow fan 2.

[0060] The driving component is used to drive the movable plate 5 relative to the fixed plate 4.

[0061] When the cross-flow fan 2 is operating, the airflow enters radially along the peripheral side of the cross-flow fan 2. The air inlet area of ​​the volute is related to the exposed area of ​​the cross-flow fan 2 relative to the volute plate and the volute tongue plate 1.

[0062] When the movable plate 5 rotates relative to the fixed plate 4, the movable plate 5 and the fixed plate 4 will at least partially overlap. The amount of overlap between the movable plate 5 and the fixed plate 4 varies depending on the position to which the movable plate 5 rotates relative to the fixed plate 4, and the area of ​​the volute plate covering the cross-flow fan 2 also changes accordingly. However, the position of the volute tongue plate 1 remains unchanged, and the area of ​​the volute tongue plate 1 covering the cross-flow fan 2 remains unchanged. Therefore, when the movable plate 5 rotates relative to the fixed plate 4, the areas of the volute plate and the volute tongue plate 1 covering the cross-flow fan 2 are different, meaning the exposed area of ​​the cross-flow fan 2 relative to the volute plate and the volute tongue plate 1 is different, and the air intake area of ​​the volute inlet is different.

[0063] In other words, the air intake area of ​​the volute air inlet can be adjusted by rotating the movable plate 5 relative to the fixed plate 4. By controlling the rotation angle of the movable plate 5 relative to the fixed plate 4, the air intake area of ​​the volute air inlet can be controlled as needed.

[0064] In this embodiment, the movable plate 5 is able to rotate between the first limit position and the second limit position.

[0065] When the movable plate 5 rotates to its first limit position, the end of the movable plate 5 near the main air inlet 3 of the hoisting machine is flush with the end of the fixed plate 4 near the main air inlet 3 of the hoisting machine. (Refer to...) Figure 2 At this time, the area covered by the volute plate for the cross-flow fan 2 is the same as the area covered by the fixed plate 4 for the cross-flow fan 2, and the air intake area of ​​the volute inlet is the largest.

[0066] When the movable plate 5 rotates to its second limit position, the end of the movable plate 5 away from the main air inlet 3 of the hoisting machine aligns with the end of the fixed plate 4 near the main air inlet 3 of the hoisting machine to form a continuous curved surface. (Refer to...) Figure 1 The area covered by the volute plate for the cross-flow fan 2 includes the area covered by the fixed plate 4 and the area covered by the movable plate 5. At this time, the movable plate 5 and the fixed plate 4 do not overlap, the area covered by the volute plate for the cross-flow fan 2 is the largest, and the air intake area of ​​the volute inlet is the smallest.

[0067] In this embodiment, the volute also includes a pair of end plates, which are distributed at intervals along the axial direction of the cross-flow fan 2 at both ends of the volute plate and the volute tongue plate 1. The end plates, the fixing plate part 4 and the volute tongue plate 1 are fixedly connected.

[0068] A pair of end plates, a volute plate, and a volute tongue plate 1 enclose a volute space, which can prevent airflow leakage at both ends of the cross-flow fan 2 and ensure the airflow at the volute outlet.

[0069] The movable plate 5 is rotatably connected to the end plate, and the end plate can serve as a support for the movable plate 5.

[0070] In a specific embodiment, the movable plate portion 5 is provided with a pair of connecting rods 6, which are located on opposite sides of a pair of end plates. One end of the connecting rod 6 is fixedly connected to the movable plate portion 5, and the other end of the connecting rod 6 is hinged to the end plate.

[0071] The movable plate 5 and the end plate are rotatably connected by a pair of connecting rods 6. The structure is simple, and both ends of the movable plate 5 are set on the end plate through the connecting rods 6. Both ends of the movable plate 5 are supported, which can improve the stability of the movable plate 5.

[0072] In a further embodiment, the volute also includes an angle detection element for detecting the rotation angle of the movable plate portion 5 relative to the fixed plate portion 4.

[0073] An angle detection element is electrically connected to a controller, which controls the rotation angle of the movable plate 5 relative to the fixed plate 4 based on the air resistance of the main air outlet 12 of the hoist.

[0074] This configuration links the rotation angle of the movable plate 5 relative to the fixed plate 4 with the air outlet resistance of the main air outlet 12 of the hoist. By controlling the rotation angle of the movable plate 5 relative to the fixed plate 4 based on the air outlet resistance of the main air outlet 12 of the hoist, the air inlet flow rate of the volute and the air outlet flow rate of the main air outlet 12 are better matched, and the control is more precise.

[0075] It should be noted that the controller here can be the controller of the hoist or a controller separately equipped for the volute. As long as it can control the rotation angle of the movable plate 5 relative to the fixed plate 4 according to the air resistance of the hoist's main air outlet 12, there is no specific limitation.

[0076] An air guide plate 11 is provided at the main air outlet 12 of the hoist. By adjusting the rotation angle of the air guide plate 11, the air resistance at the main air outlet 12 can be adjusted. Specifically, the rotation angle of the movable plate part 5 relative to the fixed plate part 4 can be controlled according to the rotation angle of the air guide plate 11.

[0077] In a specific embodiment, when the air guide plate 11 closes the main air outlet 12, the position of the air guide plate 11 is the closed position. When the air guide plate 11 rotates to the point where it does not obstruct the airflow, the air guide plate 11 needs to rotate 120° relative to the closed position.

[0078] When the rotation angle of the air guide plate 11 relative to its closed position is 0°~60°, the air guide plate 11 has a relatively large obstruction effect on the airflow, such as... Figure 1 As shown. At this time, the movable plate 5 can be rotated relative to the fixed plate 4 to the second limit position to adjust the volute to a state where the volute inlet is smaller.

[0079] When the rotation angle of the air guide plate 11 relative to its closed position is 60°~120°, the obstruction effect of the air guide plate 11 on the airflow is relatively small, such as... Figure 2 As shown. At this time, the movable plate 5 can be rotated relative to the fixed plate 4 to the first limit position to adjust the volute to a state where the volute inlet is larger.

[0080] In this embodiment of the invention, the driving component includes a motor. The housing of the motor can be fixed to the end plate or the housing 10 of the hoist. The output shaft of the motor is connected to the movable plate portion 5 via a transmission connection. When the motor is running, the output shaft of the motor can drive the movable plate portion 5 to rotate relative to the end plate.

[0081] At this time, the angle detection element includes an encoder, which is installed on the output shaft of the motor. The encoder can detect the rotation angle of the output shaft of the motor, thereby determining the rotation angle of the movable plate 5 relative to the fixed plate 4.

[0082] In this embodiment of the invention, the rotation axis of the movable plate portion 5 relative to the fixed plate portion 4 is a first straight line, and the rotation axis of the cross-flow fan 2 is a second straight line, with a gap between the first and second straight lines. This arrangement facilitates the arrangement of the drive component and the power component of the cross-flow fan 2, and helps to avoid interference.

[0083] In this embodiment, a volute diffuser 7 is provided at the end of the volute plate away from the main air inlet 3, and a volute tongue diffuser 8 is provided at the end of the volute tongue plate 1 away from the main air inlet 3. The volute diffuser 7 and the volute tongue diffuser 8 are arranged opposite to each other.

[0084] The distance between the volute diffuser 7 and the volute tongue diffuser 8 gradually increases in the direction away from the volute tongue plate 1, and the volute diffuser 7 and the volute tongue diffuser 8 extend to opposite ends of the heat exchanger 9 of the hoist.

[0085] The volute diffuser 7 and the volute tongue diffuser 8 can guide the airflow so that the airflow flows orderly to the heat exchanger 9 of the hoist.

[0086] Specifically, both end plates extend in the direction close to the heat exchanger 9. While the pair of end plates correspond to the space between the fixed plate 4 and the volute tongue plate 1, the pair of end plates also correspond to the space between the volute diffuser 7 and the volute tongue diffuser 8. This can prevent airflow leakage at the positions of the volute diffuser 7 and the volute tongue diffuser 8, and ensure the airflow to the heat exchanger 9.

[0087] On the other hand, this utility model embodiment also provides a drop-off machine, including the volute provided in any of the above embodiments. The air inlet area of ​​the volute provided in any of the above embodiments is adjustable; therefore, the drop-off machine provided in this utility model embodiment can alleviate surge problems when using a cross-flow fan 2, and has the advantages of low vibration, low noise, and stable operation. The derivation process of the beneficial effects of the drop-off machine in this utility model embodiment is largely similar to the derivation process of the beneficial effects of the volute provided above, and therefore will not be repeated here.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A volute, characterized in that, include: The volute plate and the volute tongue plate (1) are arranged opposite to each other, and a volute space is formed between the volute plate and the volute tongue plate (1). The volute space is suitable for arranging a cross-flow fan (2). There is a gap between the air inlet end of the volute plate and the air inlet end of the volute tongue plate (1) to form a volute air inlet. The volute air inlet is suitable to be opposite to the main air inlet (3) of the hoist where the volute is located. There is a gap between the air outlet end of the volute plate and the air outlet end of the volute tongue plate (1) to form a volute air outlet. The volute air outlet is suitable to be connected to the main air outlet (12) of the hoist. The air inlet area of ​​the volute air inlet is adjustable.

2. The volute according to claim 1, characterized in that, The volute plate includes: The fixed plate (4) is fixed relative to the volute tongue plate (1); The movable plate (5) is located at one end of the fixed plate (4) near the main air inlet (3) of the hoist. The movable plate (5) is adapted to reciprocate relative to the fixed plate (4). The axis of rotation of the movable plate (5) relative to the fixed plate (4) is parallel to the axis of the cross-flow fan (2). A driving element adapted to drive the movable plate portion (5) relative to the fixed plate portion (4).

3. The volute according to claim 2, characterized in that, The movable plate (5) is adapted to rotate between the first limit position and the second limit position; At the first extreme position, the end of the movable plate (5) near the main air inlet (3) of the hoisting machine is flush with the end of the fixed plate (4) near the main air inlet (3) of the hoisting machine; At the second extreme position, the end of the movable plate (5) away from the main air inlet (3) of the drop machine is connected to the end of the fixed plate (4) near the main air inlet (3) of the drop machine to form a continuous curved surface.

4. The volute according to claim 2, characterized in that, Also includes: A pair of end plates are spaced apart at both ends of the volute plate and the volute tongue plate (1) along the axial direction of the cross-flow fan (2). The end plates, the fixed plate part (4) and the volute tongue plate (1) are fixedly connected, and the movable plate part (5) is rotatably connected to the end plates.

5. The volute according to claim 4, characterized in that, The movable plate (5) is provided with a pair of connecting rods (6), and the pair of connecting rods (6) are respectively located on the side of the pair of end plates that are far apart; One end of the connecting rod (6) is fixedly connected to the movable plate (5), and the other end of the connecting rod (6) is hinged to the end plate.

6. The volute according to claim 2, characterized in that, Also includes: An angle detection element is adapted to detect the rotation angle of the movable plate part (5) relative to the fixed plate part (4). The angle detection element is electrically connected to a controller, which is adapted to control the rotation angle of the movable plate part (5) relative to the fixed plate part (4) according to the air outlet resistance of the main air outlet (12).

7. The volute according to claim 6, characterized in that, The driving component includes: An electric motor, the output shaft of which is connected to the movable plate (5) in a transmission manner; The angle detection element includes: An encoder is disposed on the output shaft of the motor, the encoder being adapted to detect the rotation angle of the output shaft of the motor.

8. The volute according to any one of claims 2-7, characterized in that, The movable plate (5) has a gap between its rotation axis relative to the fixed plate (4) and the rotation axis of the cross-flow fan (2).

9. The volute according to any one of claims 1-7, characterized in that, The volute plate is provided with a volute diffuser (7) at one end away from the main air inlet (3), and the volute tongue plate (1) is provided with a volute tongue diffuser (8) at one end away from the main air inlet (3). The volute diffuser (7) and the volute tongue diffuser (8) are arranged opposite to each other. The distance between the volute diffuser (7) and the volute tongue diffuser (8) gradually increases in the direction away from the volute tongue plate (1), and the volute diffuser (7) and the volute tongue diffuser (8) extend to opposite ends of the heat exchanger (9) of the hoist.

10. A hoisting machine, characterized in that, Including the volute as described in any one of claims 1 to 9.

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