Blowing and sucking integrated fan

Abstract

The invention discloses a blowing and sucking integrated fan which comprises a connecting shell, fan assemblies are fixedly connected to the upper end face and the lower end face of the connecting shell correspondingly, the fan assembly located at the lower end of the connecting shell is the first fan assembly, and the fan assembly located at the upper end of the connecting shell is the second fan assembly. An airflow channel is formed in the middle of the connecting shell and located between the first fan assembly and the second fan assembly, and the first fan assembly is used for guiding airflow to be sucked in from the circumferential direction of the second fan and exhausted from the circumferential direction of the first fan through the airflow channel in the middle of the connecting shell; the second fan assembly is used for guiding airflow to be sucked in from the circumferential direction of the first fan and exhausted from the circumferential direction of the second fan through the airflow channel connected with the middle of the shell. According to the blowing and sucking integrated fan, the two ventilation modes of air suction and air blowing can be provided at the same time, a driver and passengers can flexibly select a comfortable ventilation mode according to personal preference, and the sitting comfort can be greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of fans, and in particular relates to a blowing and suction integrated fan. Background Art

[0002] With the development of society and the improvement of living standards, cars have become an important means of transportation for people's daily commutes. People's demand for vehicle comfort is also increasing. Car seat comfort is considered a key factor affecting the driving and riding experience. In recent years, many automakers have begun to adopt seats with ventilation functions to enhance passenger comfort.

[0003] Different drivers have different preferences for ventilation systems, with some preferring suction and others preferring blowing. However, existing fan technologies primarily focus on single blowing or suction modes, and cannot provide both simultaneously. This prevents drivers or passengers from flexibly selecting the most comfortable ventilation method based on their personal preferences.

[0004] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0005] The object of the present invention is to provide a blowing and suction integrated fan, which can solve the technical problems raised in the above background technology.

[0006] In order to achieve the above object, a specific embodiment of the present invention provides the following technical solutions: A blowing and suction integrated fan includes a connecting shell, wherein the upper end face and the lower end face of the connecting shell are respectively fixedly connected to fan assemblies, the fan assembly located at the lower end of the connecting shell is a first fan assembly, and the fan assembly located at the upper end of the connecting shell is a second fan assembly, and an air flow channel is opened in the middle of the connecting shell, and the air flow channel is located between the first fan assembly and the second fan assembly, the first fan assembly is used to guide the air flow to be sucked in from the circumference of the second fan, and discharged from the circumference of the first fan through the air flow channel in the middle of the connecting shell, and the second fan assembly is used to guide the air flow to be sucked in from the circumference of the first fan, and discharged from the circumference of the second fan through the air flow channel in the middle of the connecting shell.

[0007] In one or more embodiments of the present invention, the two fan assemblies are detachably mounted at the upper and lower ends of the connecting shell by snap fasteners.

[0008] In one or more embodiments of the present invention, the upper end surface and the lower end surface of the connection housing are fixedly connected to a plurality of first connection columns for fixing the fan assembly; A plug-in hole is provided on the first connecting column, and a side hole matching the plug-in hole is provided on the side of the first connecting column. The fan assembly includes a fan housing, and a second connecting column matching the first connecting column is fixedly connected to the fan housing, and a plug-in column matching the plug-in hole is fixedly connected to the second connecting column, and an arc-shaped convex edge matching the side hole is fixedly connected to the plug-in column.

[0009] In one or more embodiments of the present invention, the fan assembly includes a blade assembly, and a driving mechanism for driving the blade assembly to rotate is fixedly connected to the middle portion of the fan housing.

[0010] In one or more embodiments of the present invention, the fan blade assembly includes a fan blade seat, the outer edge of the fan blade seat is fixedly connected to an upper annular base, and a plurality of fan blades are installed at the lower end of the upper annular base. The plurality of fan blades are arranged in a circle, and one end of the fan blade away from the upper annular base is fixedly connected to a lower annular base. Each of the fan blades has a curved surface curved toward a preset rotation direction. The curved surface guides the airflow when the fan assembly is running, and the fan blade design conforms to the principles of aerodynamics.

[0011] In one or more embodiments of the present invention, the integrated blowing and suction fan controls blowing and suction through PWM frequency, and controls the fan speed through the duty cycle of the PWM signal. When the PWM signal frequency is lower than a set frequency, the fan is in suction mode; when the PWM signal frequency is higher than the set frequency, the fan is in blowing mode, and the fan speed increases or decreases step by step with the duty cycle of the PWM signal; alternatively, when the PWM signal frequency is lower than the set frequency, the fan is in blowing mode; when the PWM signal frequency is higher than the set frequency, the fan is in suction mode, and the fan speed increases or decreases step by step with the duty cycle of the PWM signal.

[0012] In one or more embodiments of the present invention, the integrated blowing and suction fan controls the blowing and suction of the fan, as well as the fan speed, through the duty cycle of the PWM signal; when the duty cycle of the PWM signal is 0-50%, the fan is in the suction mode, and when the duty cycle of the PWM signal is 50%-100%, the fan is in the blowing mode, and the fan speed increases or decreases step by step with the duty cycle of the PWM signal; or when the duty cycle of the PWM signal is 0-50%, the fan is in the blowing mode, and when the duty cycle of the PWM signal is 50%-100%, the fan is in the suction mode, and the fan speed increases or decreases step by step with the duty cycle of the PWM signal.

[0013] In order to achieve the above object, a specific embodiment of the present invention provides the following technical solutions: A ventilation system comprises a blowing and suction integrated fan.

[0014] A car comprises a blowing and suction integrated fan.

[0015] Compared with the prior art, the integrated blowing and suction fan of the present invention can provide both suction and blowing ventilation modes. Drivers and passengers can flexibly choose a comfortable ventilation mode according to their personal preferences, which can greatly improve the riding comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a structural schematic diagram of a blowing and suction integrated fan in one embodiment of the present invention; Figure 2 An exploded view of a blowing and suction integrated fan according to an embodiment of the present invention; Figure 3 This is a structural diagram of a connection housing in one embodiment of the present invention; Figure 4 A schematic diagram of the structure of the fan blade assembly in one embodiment of the present invention Figure 1 ; Figure 5 A schematic diagram of the structure of the fan blade assembly in one embodiment of the present invention Figure 2 ; Figure 6 is a cross-sectional view of a fan blade assembly according to one embodiment of the present invention; Figure 7 This is a schematic diagram of the installation of a blowing and suction integrated fan in one embodiment of the present invention; Figure 8 This is a schematic diagram of a suction mode of a blower-suction integrated fan in one embodiment of the present invention; Figure 9 The figure is a schematic diagram of a blowing mode of a blowing and suction integrated fan in one embodiment of the present invention.

[0018] Description of main reference numerals: 1. Connecting shell; 101. First mounting hole; 2. First connecting column; 201. Plug-in hole; 202. Side hole; 3. Fan assembly; 4. Fan shell; 5. Second connecting column; 501. Plug-in column; 502. Arc-shaped convex edge; 6. Fixing position; 7. Fan blade assembly; 8. Fan blade seat; 9. Connecting shaft; 10. Upper annular base; 11. Lower annular base; 12. Fan blade. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0020] like Figures 1-2 As shown, a blower-suction integrated fan according to one embodiment of the present invention includes a connecting housing 1, with fan assemblies 3 fixedly connected to the upper and lower end surfaces of the connecting housing 1, respectively. The fan assemblies 3 are detachably mounted on both ends of the connecting housing 1. In this embodiment, the fan assembly 3 located at the lower end of the connecting housing 1 is the first fan assembly, and the fan assembly 3 located at the upper end of the connecting housing 1 is the second fan assembly. The first fan assembly is used to guide airflow to be drawn in circumferentially from the second fan and discharged circumferentially from the first fan through the airflow channel in the middle of the connecting housing; the second fan assembly is used to guide airflow to be drawn in circumferentially from the first fan and discharged circumferentially from the second fan through the airflow channel in the middle of the connecting housing.

[0021] In other words, when the first fan assembly is activated, the second fan assembly is deactivated, blowing air from the upper end of the connection housing 1 to the lower end. This mode is called suction mode. When the second fan assembly is activated, the first fan assembly is deactivated, blowing air from the lower end of the connection housing 1 to the upper end. This mode is called blow mode. By activating either the first or second fan, the seat ventilation mode can be changed, allowing passengers and drivers to flexibly select the most comfortable ventilation method based on their personal preferences while driving the vehicle.

[0022] like Figures 1-3 As shown, a circular hole is provided in the middle of the connecting housing 1, which serves as a passage for airflow. Multiple first connecting columns 2 are fixedly connected to both the upper and lower end surfaces of the connecting housing 1. These columns 2 enclose a space for mounting the fan assembly 3, within which the fan is mounted. A plug-in hole 201 is provided on the first connecting column 2, and a side hole 202 is provided on the side of the first connecting column 2 that matches the plug-in hole 201. The side hole 202 is located on the outside of the first connecting column 2. The fan assembly 3 includes a fan housing 4, to which a second connecting column 5 that matches the first connecting column 2 is fixedly connected. One end face of the first connecting column 2 is in contact with one end face of the second connecting column 5. A plug-in column 501 that matches the plug-in hole 201 is fixedly connected to the second connecting column 5. The plug-in column 501 is a semi-arc-shaped column, or it can be a column with an outer diameter smaller than the diameter of the plug-in hole 201. A curved ridge 502 that matches the side hole 202 is fixedly connected to the plug-in column 501.

[0023] Specifically, such asFigures 1-2 As shown, when the first connecting column 2 away from the end face of the connecting shell 1 and the second connecting column 5 away from the end face of the fan shell 4 are in contact with each other, the plug-in column 501 is inserted into the plug-in hole 201, and the arc-shaped convex edge 502 is used as a limiting piece of the plug-in column 501 and the first connecting column 2. The arc-shaped convex edge 502 is clamped in the side hole 202. The fan shell 4 is also provided with a fixed position 6 and a fan blade assembly 7, and the fixed position 6 is fixedly installed on the fan shell 4. The fixed position 6 and the fan blade assembly 7 are located between the connecting shell 1 and the fan shell 4, and the fixed position 6 and the fan blade assembly 7 are located in the space enclosed by the plurality of first connecting columns 2.

[0024] The fixed position 6 is fixedly connected to the middle part of the fan shell 4, and the outer side of the fixed position 6 is provided with a driving mechanism. The driving mechanism is that a copper wire is wound on a stator as disclosed in Chinese Patent CN222936972U, and the winding coil of the stator is connected to a circuit board.

[0025] The fixed position 6 is used for rotation with the fan blade assembly 7. In the process of rotation, the fan blade assembly 7 can guide the airflow around the fan blade assembly 7 to blow away from the end of the fixed position 6.

[0026] As shown, Figures 4-6 The fan blade assembly 7 includes a fan blade seat 8, and the outer edge of the fan blade seat 8 is fixedly connected with an upper annular base body 10. The lower end of the upper annular base body 10 is provided with a plurality of fan blades 12, and the plurality of fan blades 12 are circumferentially arranged. The end of the fan blade 12 away from the upper annular base body 10 is fixedly connected with a lower annular base body 11. The upper annular base body 10, the lower annular base body 11 and the fan blade 12 constitute a fan blade.

[0027] As shown, Figures 4-6 The middle part of the fan blade seat 8 is fixedly connected with a connecting shaft 9, and the connecting shaft 9 is used as a concentric shaft of the fan blade seat 8. The connecting shaft 9 is used for rotationally connected with the fixed position 6, that is, the connecting shaft 9 is rotationally connected with the fixed position 6 through a bearing. The inner wall of the fan blade is press-connected with a magnetic ring, and the periodic power-on and power-off of different winding coils of the stator through the circuit board changes the magnetic field to drive the fan blade to rotate.

[0028] As shown, Figures 4-6 Each fan blade 12 has a curved surface curved towards a preset rotation direction, and the curved surface guides the airflow to flow when the fan assembly 3 operates. The fan blade 12 is designed in accordance with the principle of aerodynamics.

[0029] As shown, Figures 1-2 A plurality of first mounting holes 101 are formed in the connecting shell 1, and the first mounting holes 101 are matched with the mounting hole positions on the seat. The two are fixedly connected through bolts.

[0030] As shown, Figure 7As shown, in this embodiment, the seat surface of the chair is used as the installation position of the blower-suction integrated fan. That is, the blower-suction integrated fan is installed below the seat surface, and the seat surface is provided with ventilation holes.

[0031] like Figure 8 As shown, in suction mode, the first fan assembly is activated and the second fan assembly is deactivated. When the first fan assembly is activated, the blade assembly 7 of the first fan assembly rotates, and air is drawn in from the outer periphery of the second fan by the blade assembly 7. After passing through the airflow channel, the airflow is blown out toward the end away from the seat surface, thereby achieving seat suction.

[0032] like Figure 9 As shown, in the blowing mode, the second fan assembly is activated and the first fan assembly is deactivated. When the second fan assembly is activated, the blade assembly 7 of the second fan assembly rotates, and air is drawn in from the outer periphery of the first fan by the blade assembly 7. After passing through the airflow channel, the airflow is ultimately blown out through the vents on the seat surface, thereby achieving seat blowing.

[0033] In this embodiment, after installing the integrated blower and suction fan, simply activating the first or second fan assembly switches between suction and blowing modes. This allows passengers or drivers to adjust blowing or suction according to their personal preferences, creating a personalized seating environment. The integrated blower and suction fan also promotes air circulation, reduces moisture on the seat surface, keeps the seat dry, and enhances passenger comfort.

[0034] The integrated blower and suction fan uses a butterfly-shaped fan with an optimized air duct design, increasing the ventilation cross-sectional area of ​​the suction and blowing ports. This provides excellent ventilation while reducing noise and energy consumption. It also features a simple structure, reliable operation, and a small footprint.

[0035] The blower-suction integrated fan can be used in ventilation systems, including but not limited to ventilation systems in cars.

[0036] The blowing and suction of the integrated blowing and suction fan is controlled by PWM frequency control or PWM duty cycle control.

[0037] 1. Frequency control: The blowing or suction is controlled by the PWM signal frequency, and the fan speed is controlled by the PWM signal duty cycle. When the PWM signal duty cycle is from 0% to 100%, the fan speed increases from 0 to the maximum speed; or when the PWM signal duty cycle is from 0% to 100%, the fan speed decreases from the maximum speed to 0. ① When the PWM signal frequency is lower than the set frequency, the fan is in suction mode, and when the PWM signal frequency is higher than the set frequency, the fan is in blowing mode. For example: when the PWM signal frequency is lower than 200Hz, the fan is in suction mode, and when the PWM signal frequency is higher than 200Hz, the fan is in blowing mode. Or ② When the PWM signal frequency is lower than the set frequency, the fan is in blowing mode, and when the PWM signal frequency is higher than the set frequency, the fan is in suction mode. For example: when the PWM signal frequency is lower than 200Hz, the fan is in blowing mode, and when the PWM signal frequency is higher than 200Hz, the fan is in suction mode.

[0038] 2. Duty cycle control: The fan controls blowing or suction through the PWM signal duty cycle, and controls the fan speed through the specific value of the PWM signal duty cycle. ① When the PWM signal duty cycle is low, the fan is in suction mode; when the PWM signal duty cycle is high, the fan is in blowing mode. For example, when the PWM signal duty cycle is lower than 50%, the fan is in suction mode, and the PWM signal duty cycle ranges from 0% to 50%, and the fan speed in suction mode increases from 0 to the maximum speed, or the PWM signal duty cycle ranges from 0% to 50%, and the fan speed in suction mode decreases from the maximum speed to 0; when the PWM signal duty cycle is higher than 50%, the fan is in blowing mode, and the PWM signal duty cycle ranges from 50% to 100%, and the fan speed in blowing mode decreases from 0 to the maximum speed, or the PWM signal duty cycle ranges from 50% to 100%, and the fan speed in blowing mode decreases from the maximum speed to 0. Or ② When the PWM signal duty cycle is low, the fan is in blowing mode, and when the PWM signal duty cycle is high, the fan is in suction mode. For example: when the PWM signal duty cycle is lower than 50%, the fan is in blowing mode, and the fan speed increases from 0 to the maximum speed when the PWM signal duty cycle is from 0% to 50% in blowing mode, or the fan speed decreases from the maximum speed to 0 when the PWM signal duty cycle is from 0% to 50% in blowing mode; when the PWM signal duty cycle is higher than 50%, the fan is in suction mode, and the fan speed increases from 0 to the maximum speed when the PWM signal duty cycle is from 50% to 100% in suction mode, or the fan speed decreases from the maximum speed to 0 when the PWM signal duty cycle is from 50% to 100% in suction mode.

[0039] Finally, it should be noted that how to control the rotation of the fan assembly 3 is common knowledge to those skilled in the art and will not be described in detail in this embodiment.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0041] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A blower-suction integrated fan, characterized in that: include: A connecting shell, wherein the upper end surface and the lower end surface of the connecting shell are respectively fixedly connected to the fan assembly, the fan assembly located at the lower end of the connecting shell is a first fan assembly, and the fan assembly located at the upper end of the connecting shell is a second fan assembly; An air flow channel is opened in the middle of the connecting shell, and the air flow channel is located between the first fan assembly and the second fan assembly; The first fan assembly is used to guide airflow to be sucked in from the circumference of the second fan and discharged from the circumference of the first fan through the airflow channel in the middle of the connecting shell; The second fan assembly is used to guide airflow to be sucked in from the circumference of the first fan and discharged from the circumference of the second fan through the airflow channel in the middle of the connecting shell.

2. The blowing and suction integrated fan according to claim 1, characterized in that: The two fan assemblies are detachably mounted on the upper and lower ends of the connecting shell through buckles.

3. The blowing and suction integrated fan according to claim 2, characterized in that: The upper end surface and the lower end surface of the connecting shell are both fixedly connected with a plurality of first connecting columns for fixing the fan assembly; The first connecting column is provided with a plug-in hole, and the side surface of the first connecting column is provided with a side hole matching the plug-in hole; The fan assembly includes a fan housing, a second connecting column matching the first connecting column is fixedly connected to the fan housing, a plug-in column matching the plug-in hole is fixedly connected to the second connecting column, and an arc-shaped convex edge matching the side hole is fixedly connected to the plug-in column.

4. The blowing and suction integrated fan according to claim 3, characterized in that: The fan assembly includes a fan blade assembly, and a driving mechanism for driving the fan blade assembly to rotate is fixedly connected to the middle portion of the fan housing.

5. The blowing and suction integrated fan according to claim 4, characterized in that: The fan blade assembly includes a fan blade seat, the outer edge of the fan blade seat is fixedly connected to the upper annular base, the lower end of the upper annular base is installed with a plurality of fan blades, the plurality of fan blades are arranged in a circle, and the end of the fan blade away from the upper annular base is fixedly connected to the lower annular base.

6. The blowing and suction integrated fan according to claim 5, characterized in that: Each of the blades has a curved surface that bends toward a preset rotation direction. The curved surface guides the airflow when the fan assembly is running. The design of the blades complies with the principles of aerodynamics.

7. The blowing and suction integrated fan according to claim 1, characterized in that: The blower-suction integrated fan controls blowing and suction through PWM frequency, and controls fan speed through PWM signal duty cycle; When the PWM signal frequency is lower than the set frequency, the fan is in suction mode; when the PWM signal frequency is higher than the set frequency, the fan is in blowing mode, and the fan speed increases or decreases step by step with the PWM signal duty cycle; or when the PWM signal frequency is lower than the set frequency, the fan is in blowing mode; when the PWM signal frequency is higher than the set frequency, the fan is in suction mode, and the fan speed increases or decreases step by step with the PWM signal duty cycle.

8. The blowing and suction integrated fan according to claim 7, characterized in that: The blower-suction integrated fan controls the blowing and suction of the fan, as well as the fan speed, through the PWM signal duty cycle; When the PWM signal duty cycle is 0-50%, the fan is in suction mode; when the PWM signal duty cycle is 50%-100%, the fan is in blowing mode, and the fan speed increases or decreases step by step with the PWM signal duty cycle; or when the PWM signal duty cycle is 0-50%, the fan is in blowing mode; when the PWM signal duty cycle is 50%-100%, the fan is in suction mode, and the fan speed increases or decreases step by step with the PWM signal duty cycle.

9. A ventilation system, characterized in that: It comprises the blowing and suction integrated fan as described in any one of claims 1 to 8.

10. An automobile, characterized in that: It comprises the blowing and suction integrated fan as described in any one of claims 1 to 8.

Images