A blow-suction integrated fan

Abstract

The utility model discloses a kind of blowing and sucking integrated fan, including connecting shell, the upper end surface and lower end surface of the connecting shell are respectively fixedly connected with fan assembly, the fan assembly located in the lower end of the connecting shell is first fan assembly, the fan assembly located in the upper end of the connecting shell is second fan assembly, the middle part of connecting shell is equipped with airflow channel, airflow channel is located between first fan assembly and second fan assembly, first fan assembly is used to guide airflow to be inhaled from the circumference of second fan, and be discharged from the circumference of first fan through the airflow channel in the middle part of connecting shell;Second fan assembly is used to guide airflow to be inhaled from the circumference of first fan, and be discharged from the circumference of second fan through the airflow channel in the middle part of connecting shell.The utility model of a kind of blowing and sucking integrated fan, it can provide two kinds of ventilation mode of air suction and air blowing simultaneously, and driver can flexibly select comfortable ventilation mode according to personal preference, and the comfort of riding can be greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of fan technology, specifically relating to a blower-suction integrated fan. Background Technology

[0002] With the development of society and the economy and the improvement of living standards, automobiles have become an important means of transportation for people's daily travel. People's requirements for vehicle comfort are also constantly increasing, among which the comfort of car seats is considered one of the key factors affecting the driving and riding experience. In recent years, many car manufacturers have begun to adopt seats with ventilated functions to improve riding comfort.

[0003] Different drivers have different preferences for ventilation systems; some prefer suction systems, while others prefer blowing systems. However, current fan technology mainly focuses on a single blowing or suction mode and cannot provide both blowing and suction functions simultaneously. This makes it impossible for drivers or passengers to flexibly choose the most comfortable ventilation method according to their personal preferences.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to provide a blower-suction integrated fan that can solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution provided by a specific embodiment of this utility model is as follows: A blower-suction integrated fan includes a connecting housing. Fan assemblies are fixedly connected to the upper and lower ends of the connecting housing, respectively. The fan assembly located at the lower end of the connecting housing is a first fan assembly, and the fan assembly located at the upper end of the connecting housing is a second fan assembly. An airflow channel is formed in the middle of the connecting housing, and the airflow channel is located between the first fan assembly and the second fan assembly. The first fan assembly is used to guide airflow to be drawn in from the second fan circumferentially, and discharged from the first fan circumferentially through the airflow channel in the middle of the connecting housing. The second fan assembly is used to guide airflow to be drawn in from the first fan circumferentially, and discharged from the second fan circumferentially through the airflow channel in the middle of the connecting housing.

[0007] In one or more embodiments of this utility model, the two fan assemblies are detachably mounted on the upper and lower ends of the connecting housing by means of snap-fit.

[0008] In one or more embodiments of this utility model, a plurality of first connecting posts for fixing the fan assembly are fixedly connected to both the upper and lower end faces of the connecting housing. The first connecting post has a plug hole, and the side of the first connecting post has a side hole that matches the plug hole. The fan assembly includes a fan housing, and a second connecting post that matches the first connecting post is fixedly connected to the fan housing. A plug hole that matches the plug hole is fixedly connected to the second connecting post, and an arc-shaped protrusion that matches the side hole is fixedly connected to the plug hole.

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

[0010] In one or more embodiments of this utility model, the fan blade assembly includes a fan blade seat, an upper annular base is fixedly connected to the outer edge of the fan blade seat, 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, a lower annular base is fixedly connected to the end of the fan blade away from the upper annular base, each fan blade has a curved surface that is bent 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 this utility model, the integrated blower-suction fan controls blowing and suction via PWM frequency and controls fan speed via PWM signal duty cycle. When the PWM signal frequency is lower than a set frequency, the fan operates in suction mode; when the PWM signal frequency is higher than a set frequency, the fan operates in blowing mode, and the fan speed increases or decreases progressively with the PWM signal duty cycle. Alternatively, when the PWM signal frequency is lower than a set frequency, the fan operates in blowing mode; when the PWM signal frequency is higher than a set frequency, the fan operates in suction mode, and the fan speed increases or decreases progressively with the PWM signal duty cycle.

[0012] In one or more embodiments of this utility model, the integrated blower and suction fan controls the fan's blowing and suction functions, as well as its speed, through the duty cycle of a PWM signal. 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 gradually with the PWM signal duty cycle. Alternatively, 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 gradually with the PWM signal duty cycle.

[0013] To achieve the above objectives, the technical solution provided by a specific embodiment of this utility model is as follows: A ventilation system comprising a blower and a suction fan.

[0014] A car that includes a blower / suction fan.

[0015] Compared with the prior art, the present invention provides a blower-suction integrated fan that can simultaneously provide both suction and blowing ventilation modes. Passengers can flexibly choose a comfortable ventilation mode according to their personal preferences, which can greatly improve the comfort of riding. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0018] Explanation of key figure labels: 1. Connecting housing; 101. First mounting hole; 2. First connecting post; 201. Insertion hole; 202. Side hole; 3. Fan assembly; 4. Fan housing; 5. Second connecting post; 501. Insertion post; 502. Arc-shaped protrusion; 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 Implementation

[0019] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0020] like Figures 1-2 As shown, an embodiment of the present invention provides a blower-suction integrated fan, including a connecting housing 1. Fan assemblies 3 are fixedly connected to the upper and lower ends of the connecting housing 1, respectively. The fan assemblies 3 are detachably mounted at 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 a first fan assembly, and the fan assembly 3 located at the upper end of the connecting housing 1 is a second fan assembly. The first fan assembly guides airflow to be drawn in circumferentially from the second fan and discharged circumferentially from the first fan through an airflow channel in the middle of the connecting housing; the second fan assembly guides airflow to be drawn in circumferentially from the first fan and discharged circumferentially from the second fan through an 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, and air is blown from the upper end to the lower end of the connecting housing 1; this is the suction mode. When the second fan assembly is activated, the first fan assembly is deactivated, and air is blown from the lower end to the upper end of the connecting housing 1; this is the blowing mode. By activating either the first or second fan, the seat ventilation mode can be changed, allowing passengers and drivers to flexibly choose the most comfortable ventilation method according to their personal preferences while driving.

[0022] like Figures 1-3 As shown, a circular hole is opened in the middle of the connecting housing 1, which serves as a channel for airflow. Multiple first connecting posts 2 are fixedly connected to both the upper and lower ends of the connecting housing 1, forming a space for the fan assembly 3, within which the fan is installed. Each first connecting post 2 has a insertion hole 201, and a side hole 202 matching the insertion hole 201 is opened on its side, located on the outer side of the first connecting post 2. The fan assembly 3 includes a fan housing 4, on which a second connecting post 5 matching the first connecting post 2 is fixedly connected. One end face of the first connecting post 2 contacts one end face of the second connecting post 5. A insertion post 501 matching the insertion hole 201 is fixedly connected to the second connecting post 5. The insertion post 501 is a semi-circular column, or it can be a column with an outer diameter smaller than the diameter of the insertion hole 201. An arc-shaped protrusion 502 matching the side hole 202 is fixedly connected to the insertion post 501.

[0023] Specifically, such as Figures 1-2 As shown, when the end face of the first connecting post 2 away from the connecting housing 1 contacts the end face of the second connecting post 5 away from the fan housing 4, the insertion post 501 is inserted into the insertion hole 201, and the arc-shaped protrusion 502 serves as a limiting member between the insertion post 501 and the first connecting post 2. The arc-shaped protrusion 502 is engaged in the side hole 202. A fixing position 6 and a fan blade assembly 7 are also installed on the fan housing 4. The fixing position 6 is fixedly installed on the fan housing 4. The fixing position 6 and the fan blade assembly 7 are located between the connecting housing 1 and the fan housing 4, and the fixing position 6 and the fan blade assembly 7 are located within the space enclosed by the multiple first connecting posts 2.

[0024] The fixing position 6 is fixedly connected to the middle of the fan housing 4. A drive mechanism is provided on the outside of the fixing position 6. The drive mechanism, as disclosed in Chinese Patent CN222936972U, has copper wire wound on the stator, and the stator winding coil is connected to the circuit board.

[0025] The fixed position 6 is used to rotate with the fan blade assembly 7. During the rotation of the fan blade assembly 7, the airflow around the fan blade assembly 7 can be guided to blow out towards the end away from the fixed position 6.

[0026] like Figures 4-6 As shown, the fan blade assembly 7 includes a fan blade seat 8. An upper annular base 10 is fixedly connected to the outer edge of the fan blade seat 8. A plurality of fan blades 12 are installed at the lower end of the upper annular base 10. The plurality of fan blades 12 are arranged in a circle. A lower annular base 11 is fixedly connected to the end of the fan blade 12 away from the upper annular base 10. The upper annular base 10, the lower annular base 11, and the fan blades 12 constitute the fan blade.

[0027] like Figures 4-6 As shown, a connecting shaft 9 is fixedly connected to the middle of the fan blade holder 8. The connecting shaft 9 serves as the concentric shaft of the fan blade holder 8 and is used for rotatable connection with the fixed position 6, that is, the connecting shaft 9 is rotatably connected to the fixed position 6 through a bearing. A magnetic ring is pressed into the inner wall of the fan blade. The magnetic field is changed by periodically energizing and de-energizing different winding coils of the circuit board to drive the fan blade to rotate.

[0028] like Figures 4-6 As shown, each fan blade 12 has a curved surface that bends toward a preset rotation direction. The curved surface guides the airflow when the fan assembly 3 is running. The design of the fan blade 12 conforms to the principles of aerodynamics.

[0029] like Figures 1-2 As shown, the connecting housing 1 has a plurality of first mounting holes 101, which match the mounting holes on the seat, and the two are fixedly connected by bolts.

[0030] like Figure 7As shown, in this embodiment, the seat surface is used as the installation location for the integrated blower and suction fan. That is, the integrated blower and suction fan is installed below the seat surface, and ventilation holes are provided on the seat surface.

[0031] like Figure 8 As shown, in suction mode, the first fan assembly is activated while the second fan assembly is deactivated. When the first fan assembly is activated, the fan blade assembly 7 of the first fan assembly rotates, and airflow is drawn in from the outer periphery of the second fan by the fan blade assembly 7. After passing through the airflow channel, the airflow is blown out towards 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 while the first fan assembly is deactivated. When the second fan assembly is activated, the fan blade assembly 7 of the second fan assembly rotates, and airflow is drawn in from the outer periphery of the first fan by the fan blade assembly 7. After passing through the airflow channel, the airflow is finally blown out from the ventilation holes on the seat surface, thereby achieving seat blowing.

[0033] In this embodiment, after the integrated blower-suction fan is installed, switching between suction and blowing modes can be achieved simply by activating either the first or second fan assembly. This allows passengers or drivers to adjust the blowing or suction mode according to their personal preferences, creating a personalized seating environment. The integrated blower-suction fan also helps promote air circulation, reduces moisture on the seat surface, keeps the seat dry, and improves seating comfort.

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

[0035] Combination blower and suction fan can be used in ventilation systems, including but not limited to ventilation systems in automobiles.

[0036] The blowing and suction control of the integrated blower and suction fan is achieved through PWM frequency control or PWM duty cycle control.

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

[0038] 2. Duty Cycle Control: The fan speed is controlled by the duty cycle of the PWM signal, which controls whether the fan is blowing or drawing air. ① When the PWM signal duty cycle is low, the fan operates in suction mode; when the PWM signal duty cycle is high, the fan operates in blowing mode. For example: when the PWM signal duty cycle is below 50%, the fan operates in suction mode, and the fan speed increases from 0 to the maximum speed in suction mode as the PWM signal duty cycle increases from 0% to 50%, or the fan speed decreases from the maximum speed to 0 in suction mode. When the PWM signal duty cycle is above 50%, the fan operates in blowing mode, and the fan speed increases from 0 to the maximum speed in blowing mode as the PWM signal duty cycle increases from 50% to 100%, or the fan speed decreases from the maximum speed to 0 in blowing mode. Or ② When the PWM signal duty cycle is low, the fan operates in blowing mode; when the PWM signal duty cycle is high, the fan operates in suction mode. For example: when the PWM signal duty cycle is below 50%, the fan operates in blowing mode, and the fan speed increases from 0 to the maximum speed in blowing mode when the PWM signal duty cycle is from 0% to 50%, or the fan speed decreases from the maximum speed to 0 in blowing mode when the PWM signal duty cycle is from 0% to 50%; when the PWM signal duty cycle is above 50%, the fan operates in suction mode, and the fan speed increases from 0 to the maximum speed in suction mode when the PWM signal duty cycle is from 50% to 100%, or the fan speed decreases from the maximum speed to 0 in suction mode when the PWM signal duty cycle is from 50% to 100%.

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

[0040] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A blower / suction fan, characterized in that, include: A connecting housing is provided, wherein a fan assembly is fixedly connected to the upper and lower ends of the connecting housing, the fan assembly located at the lower end of the connecting housing is a first fan assembly, and the fan assembly located at the upper end of the connecting housing is a second fan assembly. An airflow channel is provided in the middle of the connecting housing, and the airflow channel is located between the first fan assembly and 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.

2. The blower / suction fan according to claim 1, characterized in that, The two fan assemblies are detachably mounted on the upper and lower ends of the connecting housing via snap-fit ​​fasteners.

3. A blower / suction fan according to claim 2, characterized in that, The upper and lower ends of the connecting housing are each fixedly connected with a plurality of first connecting posts for fixing the fan assembly; The first connecting post is provided with a plug hole, and the side of the first connecting post is provided with a side hole that matches the plug hole; The fan assembly includes a fan housing, on which a second connecting post matching a first connecting post is fixedly connected. On the second connecting post, a plug-in post matching a plug hole is fixedly connected. On the plug-in post, an arc-shaped protrusion matching a side hole is fixedly connected.

4. A blower / suction fan according to claim 3, characterized in that, The fan assembly includes a fan blade assembly, and a drive mechanism for driving the fan blade assembly to rotate is fixedly connected to the middle of the fan housing.

5. A blower / suction fan according to claim 4, characterized in that, The fan blade assembly includes a fan blade seat, an upper annular base is fixedly connected to the outer edge of the fan blade seat, 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 a lower annular base is fixedly connected to the end of the fan blades away from the upper annular base.

6. A blower / suction fan according to claim 5, characterized in that, Each of the fan blades has a curved surface that bends toward a predetermined direction of rotation, which guides airflow when the fan assembly is in operation, and the fan blade design conforms to aerodynamic principles.

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

8. A blower / suction fan according to claim 7, characterized in that, The blower-suction fan controls the fan's blowing and suction functions, as well as its speed, through a PWM signal duty cycle. When the PWM signal duty cycle is 0-50%, the fan operates in suction mode; when the PWM signal duty cycle is 50%-100%, the fan operates in blowing mode. The fan speed increases or decreases step by step with the PWM signal duty cycle. Alternatively, when the PWM signal duty cycle is 0-50%, the fan operates in blowing mode; when the PWM signal duty cycle is 50%-100%, the fan operates in suction mode. The fan speed increases or decreases step by step with the PWM signal duty cycle.

9. A ventilation system, characterized in that, Including the blower / suction fan as described in any one of claims 1 to 8.

10. A car, characterized in that, Including the blower / suction fan as described in any one of claims 1 to 8.

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