Axial flow fan and air conditioner

Abstract

The utility model discloses an axial flow fan and an air conditioner, and relates to the technical field of air conditioners. The axial fan comprises a core shaft and fan blades. The fan blades are in a belt shape and extend in a convolution shape, the two ends of the fan blades are arranged at intervals and connected to the circumferential face of the core shaft, the fan blades and the core shaft jointly define an air guiding cavity, the maximum interval of the fan blades in the axial direction of the core shaft is a first interval, and the range of the first interval is 180-220 mm. Compared with the prior art, the axial flow fan has the advantages that due to the fact that the fan blades with the two ends connected to the peripheral face of the core shaft are adopted, and the maximum distance between the fan blades in the axial direction of the core shaft is limited within a certain range, the air outlet amount can be effectively increased, the heat dissipation effect is enhanced, air noise is reduced, and user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to an axial flow fan and an air conditioner. Background Art

[0002] At present, with the improvement of living standards, air conditioners have become an indispensable household appliance in thousands of households. The air conditioner includes an indoor unit and an outdoor unit, wherein the indoor unit is installed indoors and the outdoor unit is installed outdoors. The indoor unit and the outdoor unit work together to achieve the function of regulating the indoor temperature. The outdoor unit generally dissipates heat through an axial flow fan, but the current axial flow fan is limited by its shape and structure, has a small air volume, poor heat dissipation effect, and has a large wind noise, which affects the user experience. Utility Model Content

[0003] The problem solved by the utility model is how to effectively increase the air output, enhance the heat dissipation effect, reduce wind noise, and improve user experience.

[0004] To solve the above problems, the technical solution of the utility model is achieved as follows:

[0005] In the first aspect, the utility model provides an axial flow fan, including a core shaft and a fan blade, the fan blade is in a strip shape and is extended in a spiral shape, the two ends of the fan blade are arranged at intervals and are both connected to the circumferential surface of the core shaft, the fan blade and the core shaft together form an air guide cavity, and the maximum spacing of the fan blades in the axial direction of the core shaft is a first spacing, and the range of the first spacing is 180 mm to 220 mm. Compared with the prior art, the axial flow fan provided by the utility model uses fan blades connected to the circumferential surface of the core shaft at both ends and limits the maximum spacing of the fan blades in the axial direction of the core shaft to a certain range, so it can effectively increase the air output, enhance the heat dissipation effect, reduce wind noise, and improve user experience.

[0006] Furthermore, the first spacing is 196 mm. A reasonable first spacing can increase the projected area of ​​the air guiding cavity on the longitudinal section of the core shaft, thereby increasing the amount of air entering the air guiding cavity radially, and further increasing the amount of air directed to the axial direction, resulting in an increase in the air output, thereby enhancing the heat dissipation effect on the condenser.

[0007] Furthermore, the maximum distance between the fan blade and the axis of the core shaft in the radial direction of the core shaft is the second distance, and the range of the second distance is 180 mm to 220 mm. By limiting the second distance, the outer diameter size of the entire axial flow fan can be controlled to adapt it to different models of air conditioner outdoor units, ensuring that different models of air conditioner outdoor units have a large air output and low wind noise.

[0008] Furthermore, the second spacing is 203 mm. A reasonable second spacing can maximize the area of ​​the air guide cavity while ensuring the strength of the axial flow fan, thereby further increasing the air volume and reducing wind noise.

[0009] Furthermore, the maximum spacing of the fan blades on the cross section of the core shaft is the third spacing, the third spacing is perpendicular to the straight line where the second spacing is located, and the range of the third spacing is 180 mm to 220 mm. By limiting the third spacing, the width of a single fan blade can be controlled, thereby determining the projected area of ​​the air guide cavity on the cross section of the core shaft, increasing the air volume, and reducing wind noise.

[0010] Furthermore, the third spacing is equal to the first spacing, and the third spacing is 196 mm. A reasonable third spacing can maximize the projected area of ​​the air guide cavity on the cross section of the core shaft while ensuring low wind noise, further enhance the axial air outlet effect, and increase the air outlet volume. It can also facilitate production and processing, and improve the aesthetics of the axial flow fan.

[0011] Furthermore, the radius of the core shaft ranges from 20 mm to 40 mm. By limiting the radius of the core shaft, the ratio of the third spacing to the core shaft radius can be within a certain range, so that the third spacing is adapted to the radius of the core shaft, the connection strength between the core shaft and the fan blades is improved, and the core shaft can be ensured to drive the fan blades to rotate stably under the action of the drive motor, thereby improving the stability during the air outlet process.

[0012] Furthermore, the radius of the mandrel is 30 mm. A reasonable radius of the mandrel can ensure the connection strength between the mandrel and the drive motor, and further improve the stability of driving the fan blades to rotate, which is safe and reliable.

[0013] Furthermore, there are multiple blades, which are arranged on the circumference of the core shaft in a circular array with the axis of the core shaft as the center. The core shaft can drive multiple blades to rotate at the same time, so that air flows to form an outlet airflow, and multiple blades work together to increase the air volume and improve the efficiency of the blades.

[0014] In the second aspect, the utility model provides an air conditioner, comprising a driving motor and the above-mentioned axial flow fan, the axial flow fan comprising a core shaft and a fan blade, the driving motor is connected to the core shaft, the fan blade is in a strip shape, and is extended in a spiral shape, the two ends of the fan blade are arranged at intervals, and are both connected to the circumference of the core shaft, the fan blade and the core shaft together form an air guide cavity, the maximum spacing of the fan blade in the axial direction of the core shaft is a first spacing, and the range of the first spacing is 180 mm to 220 mm. The air conditioner can effectively increase the air volume, enhance the heat dissipation effect, reduce wind noise, and improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a structural schematic diagram of the axial flow fan according to the first embodiment of the utility model from one viewing angle;

[0016] Figure 2 is a structural schematic diagram of the axial flow fan described in the first embodiment of the utility model from another perspective;

[0017] Figure 3 It is a mathematical model diagram of the axial flow fan of the first embodiment of the utility model from one viewing angle;

[0018] Figure 4 It is a mathematical model diagram of the axial flow fan described in the first embodiment of the utility model from another perspective.

[0019] Description of reference numerals:

[0020] 100-axial flow fan; 110-core shaft; 120-fan blades; 130-air guide cavity. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0022] First embodiment

[0023] Please refer to Figures 1 to 4 The embodiment of the utility model provides an axial flow fan 100 for driving air flow, which can effectively increase the air volume, enhance the heat dissipation effect, reduce wind noise, and improve user experience.

[0024] It should be noted that the axial flow fan 100 is applied to the air conditioner outdoor unit (not shown in the figure), which is installed outdoors and connected to the air conditioner indoor unit (not shown in the figure). The air conditioner outdoor unit and the air conditioner indoor unit work together to achieve the function of regulating the indoor temperature. The air conditioner outdoor unit includes a condenser (not shown in the figure), a drive motor (not shown in the figure) and a shell (not shown in the figure), wherein the condenser, the drive motor and the axial flow fan 100 are all arranged in the shell, and the shell is used to shield and protect the condenser, the drive motor and the axial flow fan 100. The drive motor is connected to the axial flow fan 100 to drive the axial flow fan 100 to rotate. The position of the axial flow fan 100 corresponds to the position of the condenser, and the condenser is used to exchange heat with the refrigerant. The axial flow fan 100 can form a negative pressure during the rotation process to drive the air flow to form an outlet airflow, which is used to air-cool the condenser to take away the heat of the condenser and ensure the normal operation of the condenser.

[0025] The axial flow fan 100 includes a core shaft 110 and a fan blade 120. The core shaft 110 is cylindrical, and the fan blade 120 is fixedly connected to the circumference of the core shaft 110. The core shaft 110 is used to drive the fan blade 120 to rotate, and the fan blade 120 can generate negative pressure during the rotation process to drive air flow. Specifically, the core shaft 110 is used to be connected to a drive motor, and the drive motor can drive the fan blade 120 to rotate through the core shaft 110.

[0026] It is worth noting that the fan blade 120 is in the shape of a strip. If the fan blade 120 is straightened, the entire fan blade 120 is in the shape of a rectangular strip. In the present embodiment, the fan blade 120 is extended in a spiral shape, and both ends of the fan blade 120 are connected to the circumference of the core shaft 110. Specifically, the shape of the fan blade 120 is described in detail in a dynamic manner: one end of the fan blade 120 is connected to the circumference of the core shaft 110 and extends in a direction away from the core shaft 110. When the fan blade 120 extends to a certain length, the fan blade 120 twists back (the twisting angle is about 180 degrees) and extends in a direction close to the core shaft 110 until the other end of the fan blade 120 is connected to the circumference of the core shaft 110.

[0027] Furthermore, there are multiple blades 120, which are arranged on the circumference of the core shaft 110 in a circular array with the axis of the core shaft 110 as the center. The multiple blades 120 work together to increase the air output and improve the efficiency of the blades, that is, to improve the ability of the axial flow fan 100 to convert mechanical energy into wind energy when rotating. In this embodiment, the number of blades 120 is three, and the three blades 120 are arranged on the circumference of the core shaft 110 in a circular array. The core shaft 110 can drive the three blades 120 to rotate at the same time, so that the air flows to form an outlet airflow. However, it is not limited to this. In other embodiments, the number of blades 120 can be four or five, and the number of blades 120 is not specifically limited.

[0028] It should be noted that the two ends of the fan blades 120 are spaced apart and are both connected to the circumferential surface of the core shaft 110. The fan blades 120 and the core shaft 110 together form an air guide cavity 130, and the air guide cavity 130 is used for air to pass through. Specifically, in the process of the driving motor driving the axial flow fan 100 to rotate, the fan blades 120 stir the air to form a negative pressure. In this process, the first part of the air passes through the gap between two adjacent fan blades 120, and the second part of the air passes through the air guide cavity 130. Both parts of the air flow in the air outlet direction under the pressure of the fan blades 120. Compared with the solution in the prior art that the air conditioner outdoor fan can only drive the air to pass through the gap between two adjacent fan blades, the second part of the air passing through the air guide cavity 130 in the utility model can increase the air output of the entire axial flow fan 100 on the one hand, and can play a silencing role after merging with the first part of the air on the other hand, greatly reducing the wind noise.

[0029] Preferably, the maximum spacing of the fan blades 120 in the axial direction of the core shaft 110 is the first spacing, and the range of the first spacing is 180 mm to 220 mm. By limiting the first spacing, the thickness of the entire axial flow fan 100 can be controlled, and the swirling shape of the fan blades 120 can be determined to guide the radial airflow to the axial direction, thereby enhancing the axial air outlet effect, increasing the air outlet volume, enhancing the heat dissipation effect, and reducing wind noise, thereby improving the user experience. For ease of understanding, the first spacing is represented as A.

[0030] In this embodiment, the first spacing is 196 mm, that is, the maximum spacing of the fan blades 120 in the axial direction of the core shaft 110 is 196 mm. A reasonable first spacing can increase the projected area of ​​the air guide cavity 130 on the longitudinal section of the core shaft 110 (the cross section perpendicular to the core shaft 110), thereby increasing the amount of air entering the air guide cavity 130 radially, and then increasing the amount of air directed to the axial direction, resulting in an increase in the air output, and enhancing the heat dissipation effect on the condenser. However, it is not limited to this. In other embodiments, the first spacing can be 180 mm or 220 mm, and the size of the first spacing is not specifically limited.

[0031] Furthermore, the maximum distance between the fan blade 120 and the axis of the core shaft 110 in the radial direction of the core shaft 110 is the second distance, and the range of the second distance is 180 mm to 220 mm. By limiting the second distance, the outer diameter size of the entire axial flow fan 100 can be controlled to adapt it to different models of air conditioner outdoor units, ensuring that different models of air conditioner outdoor units have a large air volume and low wind noise. For ease of understanding, the second distance is represented as B.

[0032] In this embodiment, the second spacing is 203 mm, that is, the maximum spacing between the blade 120 and the axis of the core shaft 110 in the radial direction of the core shaft 110 is 203 mm. A reasonable second spacing can maximize the area of ​​the air guide cavity 130 while ensuring the strength of the axial flow fan 100, thereby further increasing the air volume and reducing wind noise. However, this is not limited to this. In other embodiments, the second spacing can be 180 mm or 220 mm, and the size of the second spacing is not specifically limited.

[0033] Furthermore, the maximum spacing of the fan blades 120 on the cross section of the core shaft 110 is the third spacing, the third spacing is perpendicular to the straight line where the second spacing is located, and the range of the third spacing is 180 mm to 220 mm. By limiting the third spacing, the width of a single fan blade 120 can be controlled, thereby determining the projected area of ​​the air guide cavity 130 on the cross section of the core shaft 110, increasing the air volume and reducing wind noise. For ease of understanding, the third spacing is represented as C.

[0034] In this embodiment, the third spacing is equal to the first spacing, and the third spacing is 196 mm. A reasonable third spacing can maximize the projected area of ​​the air guide cavity 130 on the cross section of the core shaft 110 while ensuring low wind noise, further enhancing the axial wind outlet effect and increasing the air volume. In addition, the third spacing is equal to the first spacing, which can facilitate production and processing and improve the aesthetics of the axial flow fan 100. However, it is not limited to this. In other embodiments, the third spacing can be 180 mm or 220 mm, and the size of the third spacing is not specifically limited.

[0035] It is worth noting that the radius of the mandrel 110 ranges from 20 mm to 40 mm. By limiting the radius of the mandrel 110, the ratio of the third spacing to the radius of the mandrel 110 can be within a certain range, so that the third spacing is adapted to the radius of the mandrel 110, the connection strength between the mandrel 110 and the fan blades 120 is improved, and the mandrel 110 can drive the fan blades 120 to rotate stably under the action of the drive motor, thereby improving the stability during the air outlet process. For ease of understanding, the radius of the mandrel 110 is represented as D.

[0036] In this embodiment, the radius of the mandrel 110 is 30 mm. A reasonable radius of the mandrel 110 can ensure the connection strength between the mandrel 110 and the drive motor, and further improve the stability of driving the fan blades 120 to rotate, which is safe and reliable. However, it is not limited to this. In other embodiments, the radius of the mandrel 110 can be 20 mm or 40 mm, and the radius of the mandrel 110 is not specifically limited.

[0037] The axial flow fan 100 described in the embodiment of the utility model has a blade 120 that is strip-shaped and extends in a spiral shape. The two ends of the blade 120 are spaced apart and are both connected to the circumference of the core shaft 110. The blade 120 and the core shaft 110 together form a wind guide cavity 130. The maximum spacing of the blade 120 in the axial direction of the core shaft 110 is a first spacing, and the range of the first spacing is 180 mm to 220 mm. Compared with the prior art, the axial flow fan 100 provided by the utility model uses a blade 120 that is connected to the circumference of the core shaft 110 at both ends and limits the maximum spacing of the blade 120 in the axial direction of the core shaft 110 to a certain range, so it can effectively increase the air output, enhance the heat dissipation effect, reduce wind noise, and improve user experience.

[0038] Second embodiment

[0039] The utility model provides an air conditioner (not shown) for controlling indoor temperature. The air conditioner includes an air conditioner outdoor unit and an air conditioner indoor unit, and the air conditioner outdoor unit includes a housing, a condenser, a drive motor and an axial flow fan 100. The basic structure and principle of the axial flow fan 100 and the technical effects produced are the same as those of the first embodiment. For the sake of brief description, for the parts not mentioned in this embodiment, reference may be made to the corresponding contents in the first embodiment.

[0040] In this embodiment, the air conditioner outdoor unit is installed outdoors and connected to the air conditioner indoor unit. The air conditioner outdoor unit and the air conditioner indoor unit work together to achieve the function of regulating the indoor temperature. The condenser, the drive motor and the axial flow fan 100 are all arranged in the housing. The drive motor is connected to the axial flow fan 100, and the position of the axial flow fan 100 corresponds to the position of the condenser. The axial flow fan 100 can form a negative pressure during the rotation process to drive the air flow to form an outlet air flow. The outlet air flow can cool the condenser to take away the heat of the condenser and ensure the normal operation of the condenser, thereby realizing the function of the air conditioner indoor unit to heat or cool the room.

[0041] The beneficial effects of the air conditioner described in the embodiment of the utility model are the same as those of the first embodiment, and will not be repeated here.

[0042] Although the utility model is disclosed as above, the utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the scope defined by the claims.

Claims

1. An axial flow fan, characterized in that: The invention comprises a core shaft (110) and a fan blade (120), wherein the fan blade (120) is in the shape of a strip and is extended in a spiral shape, and the two ends of the fan blade (120) are arranged at intervals and are both connected to the circumferential surface of the core shaft (110), and the fan blade (120) and the core shaft (110) together form an air guide cavity (130), and the maximum spacing between the fan blades (120) in the axial direction of the core shaft (110) is a first spacing, and the range of the first spacing is 180 mm to 220 mm.

2. The axial flow fan according to claim 1, characterized in that: The first spacing is 196 mm.

3. The axial flow fan according to claim 1, characterized in that: The maximum distance between the fan blade (120) and the axis of the core shaft (110) in the radial direction of the core shaft (110) is a second distance, and the range of the second distance is 180 mm to 220 mm.

4. The axial flow fan according to claim 3, characterized in that: The second spacing is 203 mm.

5. The axial flow fan according to claim 3, characterized in that: The maximum spacing of the fan blades (120) on the cross section of the core shaft (110) is a third spacing, the third spacing is perpendicular to the straight line where the second spacing is located, and the range of the third spacing is 180 mm to 220 mm.

6. The axial flow fan according to claim 5, characterized in that: The third spacing is equal to the first spacing, and the third spacing is 196 mm.

7. The axial flow fan according to claim 1, characterized in that: The radius of the core shaft (110) ranges from 20 mm to 40 mm.

8. The axial flow fan according to claim 7, characterized in that: The radius of the mandrel (110) is 30 mm.

9. The axial flow fan according to claim 1, characterized in that: The number of the fan blades (120) is plural, and the fan blades (120) are arranged on the circumferential surface of the core shaft (110) in a circular array with the axis of the core shaft (110) as the center of the circle.

10. An air conditioner, characterized in that: It comprises a driving motor and an axial flow fan as claimed in any one of claims 1 to 9, wherein the driving motor is connected to the core shaft (110).

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