Vortex ring generating device, air conditioner indoor unit, and air conditioner

Abstract

The present invention discloses a vortex ring generating device, an air conditioner indoor unit, and an air conditioner. The vortex ring generating device includes a housing, a vortex ring generating part, and a fan assembly. The housing includes a wind cylinder and a flow collector. The wind cylinder has an air inlet and an air outlet. The flow collector is installed at the air outlet, and an air supply port communicating with the wind cylinder is provided on the flow collector. The air passing area of the air supply port is smaller than the air passing area of the air outlet. The vortex ring generating part is installed in the housing, and the vortex ring generating part periodically allows air flow to pass through and blow out through the flow collector. The fan assembly is installed in the wind cylinder, and the fan assembly is located on the side of the vortex ring generating part away from the flow collector. The fan assembly includes a first axial flow fan and a second axial flow fan. The air supply directions of the first axial flow fan and the second axial flow fan are the same, and the rotation directions are opposite. The vortex ring air flow blown out by the vortex ring generating device of the present invention can be effectively deswirled, and the air supply volume is larger. The vortex ring air flow has a better effect of blowing air farther, in a directional manner, and at a fixed point.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and particularly to a vortex ring generating device, an indoor air conditioner, and an air conditioner. Background Art

[0002] In the existing air conditioner, the air flow after heat exchange is blown out through a conventional air outlet of the air conditioner, and the air outlet mode is conventional air outlet. The air flow coming out of the conventional air outlet is fixed, and its radiation range is short and narrow, which cannot achieve large-range and long-distance air supply, thus reducing the user experience.

[0003] By providing a vortex ring generating device with an axial flow fan, long-distance air supply can be achieved. For a vortex ring generating device with an axial flow fan, the air source inside the vortex ring generating device is provided by the axial flow fan, which results in poor aggregation degree of the air velocity at the cross-section of the air outlet of the vortex ring generating device; and the air flow velocity direction at the air outlet does not completely follow the axial direction, and the air outlet velocity diverges around, causing the vortex ring formed at the outlet to be often unstable and easily dissipated during the propagation process, unable to achieve long-distance air supply; at the same time, due to the divergent air outlet, the accuracy of fixed-point air supply is reduced.

[0004] The above content is only used to assist in understanding the technical solution of the invention, and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The main object of the present invention is to propose a vortex ring generating device, aiming to solve one or more of the above-mentioned technical problems.

[0006] To achieve the above object, the vortex ring generating device proposed by the present invention includes:

[0007] A housing, including an air duct and a flow collector. The air duct has an air inlet and an air outlet. The flow collector is installed at the air outlet. A air supply port communicating with the air duct is provided on the flow collector, and the air passing area of the air supply port is smaller than the air passing area of the air outlet;

[0008] A vortex ring generating part, installed in the housing, and the vortex ring generating part periodically supplies air flow to be blown out through the flow collector; and

[0009] A fan assembly, installed in the air duct. The fan assembly is located on the side of the vortex ring generating part away from the flow collector. The fan assembly includes a first axial flow impeller and a second axial flow impeller. The air supply directions of the first axial flow impeller and the second axial flow impeller are the same, and the rotation directions are opposite.

[0010] In one embodiment, the axis of the first axial flow impeller and / or the second axial flow impeller extends towards the air outlet.

[0011] In one embodiment, the air inlet and the air outlet are arranged oppositely.

[0012] In one embodiment, the installation angle of the blades of the first axial-flow impeller is α, and the installation angle of the blades of the second axial-flow impeller is β. The absolute value of α - β is greater than or equal to 0 degree and less than or equal to 45 degrees.

[0013] In one embodiment, the second axial-flow impeller is arranged on one side of the first axial-flow impeller close to the air outlet, and the ratio of the number of blades of the first axial-flow impeller to the number of blades of the second axial-flow impeller is greater than or equal to 0.2 and less than or equal to 5.

[0014] In one embodiment, the second axial-flow impeller is arranged on one side of the first axial-flow impeller close to the air outlet, and the ratio of the outer diameter of the first axial-flow impeller to the outer diameter of the second axial-flow impeller is greater than or equal to 0.5 and less than or equal to 2.

[0015] In one embodiment, the distance between the first axial-flow impeller and the second axial-flow impeller is greater than or equal to 3 mm and less than or equal to the axial span value of the first axial-flow impeller.

[0016] In one embodiment, the vortex ring generating part includes a driving device and a switch door. The switch door is installed on the air duct to block the airflow in the air duct from flowing to the current collector, and the driving device is connected to the switch door to periodically drive the switch door to open or close.

[0017] In one embodiment, the second axial-flow impeller is arranged close to the air outlet, and the distance between the second axial-flow impeller and the switch door is greater than or equal to 5 mm and less than or equal to three times the outer diameter of the second axial-flow impeller.

[0018] In one embodiment, the fan assembly includes a third axial-flow impeller. The axis of the third axial-flow impeller extends towards the air outlet, and the air supply directions of the third axial-flow impeller and the second axial-flow impeller are the same.

[0019] In one embodiment, the current collector is a current collector cover, and the current collector cover is tapered from the air outlet towards the air supply port.

[0020] In one embodiment, the current collector is a current collector plate. The current collector plate is installed at the air outlet, and an air supply port is formed on the current collector plate.

[0021] The present invention also provides an air conditioner indoor unit, including a vortex ring generating device, wherein the vortex ring generating device includes:

[0022] A housing, comprising a wind tube and a current collector. The wind tube includes an air inlet and an air outlet. The current collector is installed at the air outlet. A air supply port communicating with the wind tube is provided on the current collector, and the air passing area of the air supply port is smaller than that of the air outlet;

[0023] A vortex ring generating part, installed on the housing, and the vortex ring generating part periodically allows air flow to pass through and blow out through the current collector; and

[0024] A fan assembly, installed on the wind tube, the fan assembly is located on a side of the vortex ring generating part away from the current collector, the fan assembly includes a first axial flow fan and a second axial flow fan, the air supply directions of the first axial flow fan and the second axial flow fan are the same, and the rotation directions are opposite.

[0025] The present invention also provides an air conditioner, including an outdoor unit of the air conditioner and an indoor unit of the air conditioner. The outdoor unit of the air conditioner is connected to the indoor unit of the air conditioner through a refrigerant pipe. The indoor unit of the air conditioner includes a vortex ring generating device. Among them, the vortex ring generating device includes:

[0026] A housing, comprising a wind tube and a current collector. The wind tube includes an air inlet and an air outlet. The current collector is installed at the air outlet. A air supply port communicating with the wind tube is provided on the current collector, and the air passing area of the air supply port is smaller than that of the air outlet;

[0027] A vortex ring generating part, installed on the housing, and the vortex ring generating part periodically allows air flow to pass through and blow out through the current collector; and

[0028] A fan assembly, installed on the wind tube, the fan assembly is located on a side of the vortex ring generating part away from the current collector, the fan assembly includes a first axial flow fan and a second axial flow fan, the air supply directions of the first axial flow fan and the second axial flow fan are the same, and the rotation directions are opposite.

[0029] By providing a current collector cover at the air outlet of the wind tube in the present invention, the air passing area of the air supply port is smaller than that of the air outlet. A fan assembly with two-stage axial flow fans is used to drive the air flow into the vortex ring generating part, so that the air supply directions of the first axial flow fan and the second axial flow fan are the same, and the rotation directions are opposite. The vortex ring generating part periodically allows the air flow to blow out through the air duct, so that the air flow blown out by the fan assembly can be effectively deswirled. Then, the air supply volume of the vortex ring air flow blown out by the vortex ring generating device is larger, and the vortex ring air flow has a better effect of sending air farther, directionally, and at a fixed point. Description of the Drawings

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0031] Figure 1 Schematic structural diagram of an embodiment of the vortex ring generating device of the present invention;

[0032] Figure 2 is Figure 1 Exploded structural diagram of the vortex ring generating device;

[0033] Figure 3 Schematic structural diagram of an embodiment of the fan assembly of the vortex ring generating device of the present invention;

[0034] Figure 4 is Figure 3 Schematic structural diagram of the fan assembly from another angle in ;

[0035] Figure 5 Schematic structural diagram of another embodiment of the vortex ring generating device of the present invention;

[0036] Figure 6 Schematic diagram of the blade installation angle of the fan assembly of the present invention;

[0037] Figure 7 Schematic structural diagram of an embodiment of the indoor unit of an air conditioner of the present invention.

[0038] Explanation of the reference numerals in the drawings:

[0039] Label Name Label Name 100 Vortex ring generating device 2 Vortex ring generating part 1 Shell 21 Driving device 11 Air duct 22 Switching door 111 Air inlet 3 Fan assembly 112 Air outlet 31 First axial flow fan 12 Flow collector 32 Second axial flow fan 121 Air supply port 4 Flow rectifier

[0040] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the drawings. Detailed implementation manners

[0041] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, if descriptions such as "first" and "second" are involved in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where both A and B are satisfied simultaneously.

[0043] The present invention provides a vortex ring generating device, which can be used alone or in air conditioners, air purifiers, humidifiers, fresh air fans, etc.

[0044] In the embodiments of the present invention, as Figure 1 and Figure 2 shown, the vortex ring generating device 100 includes a housing 1, a vortex ring generating part 2, and a fan assembly 3;

[0045] The housing 1 includes a wind barrel 11 and a flow collector 12. The wind barrel 11 has an air inlet 111 and an air outlet 112. The flow collector 12 is installed at the air outlet 112. A air supply port 121 communicating with the wind barrel 11 is provided on the flow collector 12, and the air passing area of the air supply port 121 is smaller than the air passing area of the air outlet 112;

[0046] The vortex ring generating part 2 is installed in the housing 1, and the vortex ring generating part 2 periodically allows air flow to pass through and blow out through the flow collector 12;

[0047] The fan assembly 3 is installed in the wind barrel 11. The fan assembly 3 is located on the side of the vortex ring generating part 2 away from the flow collector 12. The fan assembly 3 includes a first axial flow fan 31 and a second axial flow fan 32. The air supply directions of the first axial flow fan 31 and the second axial flow fan 32 are the same, and the rotation directions are opposite.

[0048] In this embodiment, the inner cavity of the housing 1 forms an air duct. The shape of the wind barrel 11 can be a straight barrel shape or a bent barrel shape, and its cross-section can be a rectangle, a circle, an ellipse, a polygon, a special shape, etc., which is not specifically limited herein. When the air outlet 112 and the air inlet 111 are oppositely arranged, the wind barrel 11 is in a straight barrel shape, which has a small volume, occupies a small space, has a small frictional resistance along the air flow, and the air outlet is more uniform and smooth. When the air outlet 112 and the air inlet 111 are not opposite, the wind barrel 11 is in a bent shape. The overall shape and cross-sectional shape of the wind barrel 11 can be selected according to the use requirements, which is not specifically limited herein. The shapes of the air outlet 112, the air inlet 111, and the air supply port 121 can be a circle, a rectangle, an ellipse, etc., which is not specifically limited herein. The flow collector 12 and the wind barrel 11 can be integrally formed or separately formed. It can be understood that when the flow collector 12 and the wind barrel 11 are separately formed, the flow collector 12 and the wind barrel 11 are hermetically connected.

[0049] The vortex ring generating part 2 can be installed on the air duct 11 or on the current collector 12, and the specific installation position can be selected according to the usage requirements. The vortex ring generating part 2 can be installed inside or outside the housing 1 in a detachable manner, or the vortex ring generating part 2 can also be integrally formed with the housing 1. The vortex ring generating part 2 can periodically supply air flow to blow out through the current collector 12. Since the fan assembly 3 is continuously taking in air, the air accumulated on one side of the vortex ring generating part 2 close to the fan assembly 3 will be quickly blown towards the air outlet 121, thereby forming a vortex ring air flow with a certain speed. The air passing area of the air outlet 121 is smaller than that of the air outlet 112. Therefore, in the air flow flowing from the air outlet 112 to the air outlet 121, part of the air flow will flow along the inner wall surface of the current collector 12 and then flow out from the periphery of the air outlet 121, and the other part of the air flow will flow out from the middle of the air outlet 121. The part of the air flow flowing out from the edge of the air outlet 121 is defined as the edge air flow, and the air flow flowing out from the middle of the air outlet 121 is defined as the middle air flow. Then, due to the resistance of the inner wall surface of the current collector 12, the edge air flow has a lower flow rate compared to the middle air flow. This difference in flow rate will cause a vortex ring air flow when the air flow flows out from the air outlet 121. Thus, directional, fixed-point and long-distance air supply can be achieved. And during the transmission process, the vortex ring exchanges heat with the surrounding ambient air, and the temperature difference between the vortex ring temperature and the surrounding air temperature is not large, ensuring that there is no obvious feeling of overcooling or overheating when the vortex ring blows on people, and improving comfort.

[0050] Specifically, the vortex ring generating part 2 includes a driving device 21 and a switch door 22. The switch door 22 is installed on the air duct 11 to block the air flow in the air duct 11 from flowing towards the current collector 12, and the driving device 21 is connected to the switch door 22 to periodically drive the switch door 22 to open or close.

[0051] In this embodiment, it should be noted that when the switch door 22 is closed, that is, when the air flow in the air duct 11 is blocked from flowing to the current collector 12, the switch door 22 can be completely closed or partially closed. For example, only 2 / 3, 4 / 5, 5 / 6, 9 / 10, etc. of the channel cross-section of the air duct 11 is closed. The driving device 21 can include a control board and a driving member. The control board controls the driving member to drive the switch door 22 to reciprocate or repeatedly open and close the air duct. The driving device 21 can be arranged inside the housing 1, or on the housing 1 or outside the housing 1. In order to prevent the driving device 21 from obstructing the air flow in the air duct, preferably, the control member is arranged on the housing 1 or outside the housing 1. The switch door 22 can be arranged in the inner cavity of the air duct 11, dividing the inner cavity of the air duct 11 into two parts. Then, the switch door 22 can be used to block the air flow from flowing to the air outlet 112. The switch door 22 can also be arranged at the air outlet 112 of the air duct 11. At this time, the switch door 22 can block the air flow from flowing from the air outlet 112 to the current collector 12. When the switch door 22 is closed, that is, when the air flow in the air duct 11 is blocked from flowing to the current collector 12, air continuously enters the air duct 11. At this time, a certain amount of air flow can be accumulated in the air duct 11 to form a certain pressure. Therefore, when the switch door 22 is opened, the air flow in the air duct 11 can form a driving force and blow out from the air supply port 121 to form a vortex ring. In this way, the periodic opening and closing of the switch door 22 enables the air flow to flow out in a pulsed manner, and thus long-distance and directional air supply can be achieved. The switch door 22 can be in the form of a blade structure, a fan structure, etc., as long as it can periodically block the air flow in the air duct 11 from flowing to the current collector 12 to form a vortex ring and blow out. In other embodiments, the switch door 22 can also be installed on the air collecting cover to periodically block the air flow from flowing from the air outlet 112 to the air supply port 121.

[0052] The fan assembly 3 can drive sufficient air flow to flow into the vortex ring generating part 2 from the air inlet 111, so that the air flow forms a vortex ring air flow and blows out from the air outlet 112 after passing through the vortex ring generating part 2, and ensures that the output range of the vortex ring air flow is large and the output distance is far, thereby ensuring a good air outlet effect and improving the user experience. The fan assembly 3 can include a two-stage wind wheel, a three-stage wind wheel, a four-stage wind wheel, etc. It can be understood that when the fan assembly 3 includes multiple-stage wind wheels, the air supply directions of the multiple-stage wind wheels are the same, all from the air inlet 111 to the air outlet 112. By using multiple-stage wind wheels, the air intake volume can be increased, so that the vortex ring air flow blown out from the air outlet 112 is larger and the air supply distance is farther.

[0053] The fan assembly 3 includes a first axial-flow impeller 31 and a second axial-flow impeller 32. The air supply directions of the first axial-flow impeller 31 and the second axial-flow impeller 32 are the same, and the rotation directions are opposite. Then, this fan can be a contra-rotating fan. That is, the rotation directions of the first axial-flow impeller 31 and the second axial-flow impeller 32 are opposite, and the helix directions of the blades of the first axial-flow impeller 31 and the second axial-flow impeller 32 on the hub are also opposite, so that the air supply directions are the same. Further, the first axial-flow impeller 31 and the second axial-flow impeller 32 are coaxially arranged. In this way, the frictional resistance along the path of the air flow is small, and the effect of eliminating rotation is better. The vortex ring generating device 100 further includes a motor. There can be two motors, and the two motors are mounted on opposite axes, and respectively provide power for the first axial-flow impeller 31 and the second axial-flow impeller 32. By making the rotation direction of the first axial-flow impeller 31 opposite to that of the second axial-flow impeller 32, and the air supply directions of the first axial-flow impeller 31 and the second axial-flow impeller 32 are consistent, the circumferential rotation of the air flow can be offset, so that the air flow can flow out along the axial direction as much as possible, so that the air flow blown out from the air outlet 112 is more concentrated and will not diverge to the surroundings. Then, the cohesion and stability of the vortex ring are improved, the dissipation during the propagation of the vortex ring is slowed down, and the air supply distance of the vortex ring is increased.

[0054] Specifically, please refer to Figure 3 , Figure 4 and Figure 6 , in the air inlet direction of the air flow flowing through the fan assembly 3, the blade installation directions of the first axial-flow impeller 31 and the second axial-flow impeller 32 are opposite. In this way, when the helix directions of the first axial-flow impeller 31 and the second axial-flow impeller 32 are opposite, the air supply directions of the first axial-flow impeller 31 and the second axial-flow impeller 32 are the same, so that the air supply volume of the fan assembly 3 is larger and the effect of eliminating rotation is better. Through the outlet 112 velocity streamline simulation of the vortex ring generating device 100 using a single impeller and a contra-rotating impeller, it can be seen that the outlet 112 streamline of the vortex ring generating device 100 using a single impeller has the characteristic of diverging to the surroundings, while the outlet 112 streamline of the vortex ring generating device 100 using a contra-rotating impeller is straight and the air outlet speed is more uniform. When a single impeller blows air, the outlet 112 speed has rotation, and there is a velocity air volume in the plane perpendicular to the axial direction, resulting in the characteristic of the air outlet diverging to the surroundings. When the contra-rotating impeller blows air, the air flow from the first axial-flow impeller 31 has rotation. When passing through the second axial-flow impeller 32, the rotation direction of the second axial-flow impeller 32 is opposite to that of the first impeller, which makes the helix direction applied by the second axial-flow impeller 32 to the air cancel the helix direction applied by the first axial-flow impeller 31 to the air, so that the air flow from the second axial-flow impeller 32 is straight and the cross-sectional velocity distribution is more uniform.

[0055] In the present invention, by providing a flow collector at the air outlet 112 of the air duct 11, the air passing area of the air supply port 121 is made smaller than that of the air outlet 112. The fan assembly 3 with two-stage axial flow wheels is used to drive the air flow into the vortex ring generating part 2, such that the air supply directions of the first axial flow wheel 31 and the second axial flow wheel 32 are the same, while the rotation directions are opposite. The vortex ring generating part 2 periodically drives the air flow to blow out through the air duct. Then, the air flow blown out by the fan assembly 3 can be effectively deswirled. Thus, the air supply volume of the vortex ring air flow blown out by the vortex ring generating device 100 is larger, and the vortex ring air flow has a better effect of longer-distance air supply, directional air supply, and fixed-point air supply.

[0056] Further, as Figure 2 and Figure 5 shown, the axes of the first axial flow wheel 31 and / or the second axial flow wheel 32 extend towards the air outlet 112. In this way, the first axial flow wheel 31 and / or the second axial flow wheel 32 are arranged facing the air outlet 112. Then, when the air flow blown out from the axial flow wheel flows towards the air outlet 112, the air flow resistance along the way is small, the air outlet is more uniform, and the noise is smaller at the same time. In other embodiments, the first axial flow wheel 31 and the second axial flow wheel are coaxially arranged, and the axes of both form an included angle with the air supply direction at the air outlet 112. It is also possible that the axis of one axial flow wheel extends towards the air outlet 112, and the axis of the other axial flow wheel forms an included angle with the air supply direction at the air outlet 112.

[0057] Further, please refer to Figure 6 together. The installation angle of the blades of the first axial flow wheel 31 is α, and the installation angle of the blades of the second axial flow wheel 32 is β. The absolute value of α - β is greater than or equal to 0 degree and less than or equal to 45 degrees.

[0058] In this embodiment, it should be noted that after the hub is unfolded, a blade profile projection is formed at the junction of the blade and the hub. This blade profile projection has a leading edge point and a trailing edge point, and the line connecting the leading edge point and the trailing edge point is the chord length. The installation angle of the blade refers to the included angle between this chord length and the direction of the hub axis. The first axial flow wheel 31 pre-swirls the air flow flowing in from the air inlet 111, and then the second axial flow wheel 32 deswirls the air flow blown out by the first axial flow wheel 31. If the installation angles of the first axial flow wheel 31 and the second axial flow wheel 32 differ too much, it is easy to cause the phenomenon of air flow separation on the blades of the second axial flow wheel 32 for the air output from the first axial flow wheel 31, which affects the work done by the second axial flow wheel 32 and further reduces the effect of the fan assembly 3. Specifically, the value of |α - β| can be 0 degree, 5 degrees, 10 degrees, 15 degrees, 20 degrees, 25 degrees, 30 degrees, 35 degrees, 40 degrees, 45 degrees, etc. By making the absolute value of α - β greater than or equal to 0 degree and less than or equal to 45 degrees, the deswirling effect of the fan assembly 3 can be better while ensuring the air supply volume, so that the vortex ring sent out from the air outlet 112 can achieve long-distance air supply.

[0059] In one embodiment, please refer to Figure 2 and Figure 3 , the second axial flow wind wheel 32 is arranged on the side of the first axial flow wind wheel 31 close to the air outlet 112, and the ratio of the number of blades of the first axial flow wind wheel 31 to the number of blades of the second axial flow wind wheel 32 is greater than or equal to 0.2, and less than or equal to 5. The more blades a wind wheel has, the more parts of the wind passing through the wind wheel are cut, and the better the turbulence effect of the airflow. When the ratio of the number of blades of the first axial flow wind wheel 31 to the number of blades of the second axial flow wind wheel 32 is greater than or equal to 0.2, and less than or equal to 5, the wind coming out of the first axial flow wind wheel 31 and the second axial flow wind wheel 32 have a better matching effect, that is, the second axial flow wind wheel 32 has a better de-cyclonic effect on the wind blown out of the first axial flow wind wheel 31.

[0060] Please also refer to Figure 4 The second axial flow wind wheel 32 is disposed on a side of the first axial flow wind wheel 31 close to the air outlet 112. The outer diameter of the first axial flow wind wheel 31 (eg Figure 4 D1 in FIG. 1 and the outer diameter of the second axial flow wind wheel 32 (eg Figure 4 The ratio of D2) in is greater than or equal to 0.5 and less than or equal to 2.

[0061] It should be noted that the outer diameter of the axial flow wind wheel here refers to the diameter of the largest circle formed by the trajectory of the wind blades when the axial flow wind wheel rotates. Specifically, the ratio of the outer diameter of the first axial flow wind wheel 31 to the outer diameter of the second axial flow wind wheel 32 can be 0.5, 0.8, 1, 1.2, 1.5, 1.8, 2, etc. The first axial flow wind wheel 31 and the second axial flow wind wheel 32 are both located in the wind tube 11. If the outer diameters of the two wind wheels differ too much, the wind from the first axial flow wind wheel 31 will experience a rapid speed change before entering the second axial flow wind wheel 32, which will deteriorate the pre-rotation effect of the first axial flow wind wheel 31, thereby deteriorating the derotation effect of the second axial flow wind wheel 32 on the first axial flow wind wheel 31, thereby affecting the straightness of the wind from the second axial flow wind wheel 32. Therefore, the ratio of the outer diameter of the first axial flow wind wheel 31 to the outer diameter of the second axial flow wind wheel 32 is greater than or equal to 0.5 and less than or equal to 2, so that the wind flowing out of the wind wheel assembly can have a better de-rotation effect, so that the vortex ring blown out of the air outlet 112 can deliver air farther.

[0062] Furthermore, the distance between the first axial flow wind wheel 31 and the second axial flow wind wheel 32 (eg Figure 4 L1 in the figure is greater than or equal to 3 mm and less than or equal to the axial span value of the first axial flow wind wheel 31 (such as Figure 4 d1 in the figure).

[0063] In this embodiment, the axial span value of the axial flow impeller refers to defining a reference plane that passes through and is parallel to the axis of the axial flow impeller. After the blades of the axial flow impeller are projected onto this reference plane, a projection plane is formed, and the length of this projection plane in the axial direction is the axial span value of the axial flow impeller. If the distance between the first axial flow impeller 31 and the second axial flow impeller 32 is too small, it may cause possible interference between the first axial flow impeller 31 and the second axial flow impeller 32 during rotation due to blade deformation, resulting in damage to the blades by mutual impact. On the one hand, if the distance between the first axial flow impeller 31 and the second axial flow impeller 32 is too large, it will increase the volume of the entire vortex ring generating device 100. On the other hand, if the distance is too large, the pre-rotated air flow from the first axial flow impeller 31 will have its pre-rotation effect reduced after a long-distance transmission, and the resistance between the air flow and the channel during the journey will increase, greatly reducing the pre-rotation effect of the air flow coming out of the first axial flow impeller 31. As a result, the swirl elimination effect of the second axial flow impeller 32 on the first axial flow impeller 31 becomes worse, thereby affecting the straightness of the air flow from the second axial flow impeller 32. By making the distance between the first axial flow impeller 31 and the second axial flow impeller 32 greater than or equal to 3 mm and less than or equal to the axial span value of the first axial flow impeller 31, there will be no interference between the first axial flow impeller 31 and the second axial flow impeller 32. And under the condition of a reasonable volume of the vortex ring generating device 100, the swirl elimination effect of the fan assembly 3 is ensured, so that the air supply at the air outlet 112 is more concentrated, improving the cohesion and stability of the vortex ring, slowing down the dissipation during the propagation of the vortex ring, and increasing the air supply distance of the vortex ring.

[0064] Further, please refer to Figure 2 and Figure 5 simultaneously. In the above embodiment where the vortex ring generating part 2 includes the driving device 21 and the switch door 22, the second axial flow impeller 32 is arranged close to the air outlet 112, and the distance between the second axial flow impeller 32 and the switch door 22 (such as Figure 5 L2 therein) is greater than or equal to 5 mm and less than or equal to three times the outer diameter of the second axial flow impeller 32 (such as Figure 4 D2 therein).

[0065] In this embodiment, the second axial-flow impeller 32 is disposed near the air outlet 112, that is, near the switch door 22. When the impeller blades do work on the air flow, there is a reaction force of the air flow on the blades, which can cause slight deformation of the blades. The distance between the second axial-flow impeller 32 and the switch door 22 cannot be too small, otherwise it is easy to cause interference between the second axial-flow impeller 32 and the switch door 22 when the second axial-flow impeller 32 rotates. The distance between the second axial-flow impeller 32 and the switch door 22 cannot be too large either, as it is easy to make the volume of the entire vortex generator too large. By making the distance between the second axial-flow impeller 32 and the vortex ring generating member greater than or equal to 5 mm and less than or equal to three times the outer diameter of the second axial-flow impeller 32, interference between the second axial-flow impeller 32 and the switch door 22 will not occur while ensuring that the volume of the entire vortex generator is relatively small.

[0066] In one embodiment, the fan assembly 3 includes a third axial-flow impeller, and the axis of the third axial-flow impeller extends toward the air outlet 112. The air supply directions of the third axial-flow impeller and the second axial-flow impeller 32 are the same.

[0067] In this embodiment, when the fan assembly 3 has three-stage impellers, the three-stage impellers are closely arranged together, and the air supply directions of the first axial-flow impeller 31, the second axial-flow impeller 32, and the third axial-flow impeller are all the same. The third axial-flow impeller can be disposed between the first axial-flow impeller 31 and the second axial-flow impeller 32, or at one end of the first axial-flow impeller 31 away from the second axial-flow impeller 32, or at one end of the second axial-flow impeller away from the first axial-flow impeller 31. The rotation direction of the third axial-flow impeller can be the same as the rotation direction of the first axial-flow impeller 31 or the same as the rotation direction of the second axial-flow impeller 32. It can be understood that effective anti-rotation can be achieved by changing the rotational speed of the impellers. For example, the rotational speeds of two impellers with the same rotation direction can be made relatively large, and the rotational speed of the other impeller can be made relatively small. Effective anti-rotation can also be achieved by designing the installation angle of the blades, etc., so that the air flow can be effectively anti-rotated after passing through the three-stage impellers. Specifically, if the rotation directions of the impellers at both ends are the same and the rotation direction of the middle impeller is opposite to that of the impellers at both ends, then after the air flow passes through the three-stage impellers, effective anti-rotation can be carried out, so that the air flow blown out from the air outlet 112 is more concentrated and will not diverge to the surroundings, thereby realizing long-distance air supply. When the fan assembly 3 has four-stage, five-stage, etc. impellers, its working principle and design concept are similar to those of the three-stage impellers, and reasonable design and installation can be carried out according to the three-stage impellers, which will not be elaborated one by one here.

[0068] In one embodiment, as Figure 2As shown in the figure, the current collector 12 is a current collector cover, and the current collector cover is tapered from the air outlet 112 to the air supply port 121. The cross-sectional shape of the current collector cover can be circular, elliptical, rectangular, etc. In order to reduce the wind resistance, the current collector cover is generally cylindrical. By making the current collector cover tapered from the air outlet 112 to the air supply port 121, the current collector cover can collect the air sent out from the air outlet 112, and make the generation and blowing of the vortex ring smoother.

[0069] In another embodiment, the current collector 12 is a current collector plate, the current collector plate is installed at the air outlet 112, and an air supply port 121 is opened on the current collector plate. The current collector plate can be a plate covering the air outlet 112, and by opening an air supply port 121 smaller than the air outlet 112 on the current collector plate, when the air flow blows from the air outlet 112 to the air supply port 121, due to the partial blocking effect of the current collector plate, the air flow blown out from the air supply port 121 can be in the shape of a vortex ring. And the structure of the current collector plate is simple, easy to manufacture and process. In other embodiments, the current collector 12 can also be formed by enclosing several plates. By setting the air supply port 121 on one of the plates, the formation of the vortex ring can also be realized.

[0070] In one embodiment, as Figure 2 shown, the vortex ring generating device 100 further includes a rectifying member 4. The rectifying member is arranged between the air outlet 112 and the air supply port 121, and the rectifying member 4 is used to rectify the air flow blown out by the vortex ring generating part 2 and then flow out from the air supply port 121. After the air flow is blown out by the vortex ring generating part 2, the air outlet speed around may be uneven. By rectifying the air blown out by the vortex ring generating part 2 and then flowing out from the air supply port 121, the air flow speed blown out from the air supply port 121 is made uniform, so that the cohesion and stability of the vortex ring blown out from the air supply port 121 are higher, the dissipation during the propagation of the vortex ring is slowed down, the vortex ring air supply distance is increased, and the accuracy of the vortex ring fixed-point air supply is improved.

[0071] The present invention also proposes an air conditioner indoor unit. Please refer to Figure 7 ., the air conditioner indoor unit includes a vortex ring generating device 100. The specific structure of the vortex ring generating device 100 refers to the above embodiments. Since the air conditioner indoor unit adopts all the technical solutions of the above all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0072] The air conditioner indoor unit may have one or more vortex ring generating devices 100, and the vortex ring generating device 100 may have an independent air duct. At this time, the air inlet 111 of the vortex ring generating device 100 may be an indoor air inlet 111, an outdoor air inlet 111, etc. It is also possible to connect the air duct of the vortex ring generating device 100 to the air duct of the air conditioner indoor unit. In this way, after the air flow heat-exchanged by the air conditioner indoor unit passes through the vortex ring generating device 100, long-distance, fixed-point, and directional air supply of cold air or hot air can be achieved. The vortex ring generating device 100 can be installed inside or outside the housing of the air conditioner indoor unit in a detachable manner, or can be integrally formed with the housing of the air conditioner indoor unit.

[0073] The present invention also provides an air conditioner, which includes an air conditioner indoor unit and an air conditioner outdoor unit connected by a refrigerant pipe. Among them, the air conditioner indoor unit includes a vortex ring generating device 100. The specific structure of the vortex ring generating device 100 refers to the above-mentioned embodiments. Since the air conditioner indoor unit adopts all the technical solutions of the above-mentioned all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated one by one here.

[0074] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A vortex ring generating device, characterized in that, Comprising: A housing, including a wind tube and a flow collector. The flow collector is integrally formed with the wind tube. The wind tube has an air inlet and an air outlet. The flow collector is installed at the air outlet and is hermetically connected to the wind tube. A air supply port communicating with the wind tube is provided on the flow collector, and the air passing area of the air supply port is smaller than that of the air outlet. The flow collector is a flow collecting cover, and the flow collecting cover is tapered from the air outlet to the air supply port. A vortex ring generating part, including a driving device and a switch door. The switch door is installed in the wind tube, dividing the inner cavity of the wind tube into two parts to block the air flow in the wind tube from flowing towards the flow collector. The driving device is connected to the switch door to periodically drive the switch door to open or close, and the vortex ring generating part periodically allows air flow to pass through and blow out through the flow collector. And A fan assembly, installed in the wind tube. The fan assembly is located on the side of the vortex ring generating part away from the flow collector. The fan assembly includes a first axial flow fan and a second axial flow fan provided in the wind tube. The air supply directions of the first axial flow fan and the second axial flow fan are the same, and the rotation directions are opposite. The second axial flow fan is arranged close to the air outlet. The distance between the second axial flow fan and the switch door is greater than or equal to 5 mm and less than or equal to three times the outer diameter of the second axial flow fan.

2. The vortex ring generating device according to claim 1, wherein The axis of the first axial flow fan and / or the second axial flow fan extends towards the air outlet.

3. The vortex ring generating device according to claim 1, characterized in that, The installation angle of the blades of the first axial flow fan is α, and the installation angle of the blades of the second axial flow fan is β. The absolute value of α - β is greater than or equal to 0 degree and less than or equal to 45 degrees.

4. The vortex ring generating device according to claim 1, wherein The second axial flow fan is arranged on the side of the first axial flow fan close to the air outlet. The ratio of the number of blades of the first axial flow fan to the number of blades of the second axial flow fan is greater than or equal to 0.2 and less than or equal to 5.

5. The vortex ring generating device according to claim 1, wherein The second axial flow fan is arranged on the side of the first axial flow fan close to the air outlet. The ratio of the outer diameter of the first axial flow fan to the outer diameter of the second axial flow fan is greater than or equal to 0.5 and less than or equal to 2.

6. The vortex ring generating device according to claim 1, characterized in that, The distance between the first axial flow fan and the second axial flow fan is greater than or equal to 3 mm and less than or equal to the axial span value of the first axial flow fan.

7. The vortex ring generating device according to claim 1, wherein The fan assembly includes a third axial flow fan. The axis of the third axial flow fan extends towards the air outlet. The air supply directions of the third axial flow fan and the second axial flow fan are the same.

8. An indoor air conditioner, characterized in that, Including the vortex ring generating device according to any one of claims 1 to 7.

9. An air conditioner, characterized in that, Including an air conditioner outdoor unit and the air conditioner indoor unit according to claim 8. The air conditioner outdoor unit is connected to the air conditioner indoor unit through a refrigerant pipe.

Images