Combined stirring blade integrated fan with bidirectional unequal impellers and automobile seat ventilation system

Abstract

The invention provides a two-way unequal impeller combined stirring blade integrated fan and an automobile seat ventilation system, and relates to the technical field of fans, and the fan is characterized in that a fan shell is installed on an automobile seat, and a first space, a second space, a second air flow exchange port and a first air flow exchange port which are communicated with one another are formed in the shell. The first blade stirring fan assembly is installed in the first space, the second blade stirring fan assembly is installed in the second space, and the first impeller and the second impeller are coaxially arranged and are opposite in arrangement direction. In the working process, the first blade stirring fan assembly and the second blade stirring fan assembly are controlled to work, the air suction function and the air blowing function can be completed, the structure is simple, and control is convenient. Due to the fact that only one air flowing path is arranged, the air leakage condition is not prone to occurring; therefore, enough gas flow is achieved, and a good ventilation effect is achieved.

Description

Technical Field

[0001] The present invention generally relates to the technical field of fans, and in particular to a combined blade-moving fan with bidirectional unequal impellers and a car seat ventilation system. Background Art

[0002] Existing automobile seats are all equipped with ventilation devices. In order to meet more usage requirements, the existing ventilation devices are equipped with fan structures with two functions of blowing and sucking.

[0003] In order to realize the functions of blowing and sucking air, the existing fan structure has multiple air outlets, which are used for air intake and air exhaust when sucking air, and air intake and air exhaust when blowing air; and an additional wind shield structure is also provided. By controlling the switching state of the wind shield structure, the air inlet or air outlet can be individually blocked, so that the fan structure is in the suction or blowing mode.

[0004] Among them, the design of the wind shield structure is relatively complicated, and it is easy to have air leakage due to poor shielding; and controlling the switching state of the wind shield structure requires the additional installation of a control motor, which will also reduce the gas flow due to the occupied space, resulting in unsatisfactory ventilation effect. Summary of the invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a combined fan with bidirectional unequal impellers and a car seat ventilation system.

[0006] In one aspect, the present invention provides a combined blade fan with bidirectional unequal impellers, which is used in a ventilation system of a car seat, comprising: A shell component, wherein the shell component has a first space and a second space that are interconnected; the shell component has a first airflow exchange port and a second airflow exchange port; the first space is connected to the first airflow exchange port, and the second space is connected to the second airflow exchange port; a first blade fan assembly and a second blade fan assembly, wherein the first blade fan assembly is installed in the first space; the second blade fan assembly is installed in the second space; the first blade fan assembly and the second blade fan assembly work independently; When the first blade fan assembly is actively working, the gas flows from the side of the car seat close to the occupant through the second airflow exchange port, the second space, the first space and the first airflow exchange port to the side of the car seat away from the occupant; When the second blade fan assembly is actively working, the gas flows from the side of the car seat away from the occupant through the first airflow exchange port, the first space, the second space and the second airflow exchange port to the side of the car seat close to the occupant; The first blade fan assembly includes a first impeller; the second blade fan assembly includes a second impeller; The first impeller and the second impeller have different thicknesses along a direction in which the rotation axes of the first impeller and the second impeller extend.

[0007] According to the technical solution provided by the present invention, the thickness of the first impeller along the extension direction of its rotation axis is greater than the thickness of the second impeller along the extension direction of its rotation axis.

[0008] According to the technical solution provided by the present invention, the length of the first impeller along the direction perpendicular to the rotation axis is smaller than the length of the second impeller along the direction perpendicular to the rotation axis.

[0009] According to the technical solution provided by the present invention, the second impeller and the first impeller are both centrifugal structures with blades, and the second impeller and the first impeller drive the gas to move in opposite directions when they rotate; the second airflow exchange port and the first airflow exchange port are both located on the side wall of the shell assembly.

[0010] According to the technical solution provided by the present invention, the housing assembly includes: An upper shell, a middle shell, and a lower shell are connected to each other; the first space is formed between the upper shell and the middle shell; and the second space is formed between the middle shell and the lower shell.

[0011] According to the technical solution provided by the present invention, a protrusion is provided on the outer side wall of the middle shell, and the protrusion is used to connect with the supporting layer to fix the relative position of the shell assembly and the supporting layer.

[0012] According to the technical solution provided by the present invention, the diameter of the lower shell is greater than the diameter of the upper shell, and the diameter of the raised portion is greater than or equal to the diameter of the lower shell; a connecting space is formed between the raised portion and the lower shell, which is used to connect with the air guide layer to fix the relative position between the shell assembly and the air guide layer.

[0013] On the other hand, the present invention also provides a vehicle seat ventilation system, comprising: A combined blade fan with bidirectional unequal impellers as described in any one of the above items; The supporting layer is used to connect the space close to the passenger side and the space away from the passenger side; the supporting layer is provided with an air guide portion on the side away from the passenger; the shell assembly is connected to the air guide portion, and the second airflow exchange port is connected to the internal space of the air guide portion.

[0014] According to the technical solution provided by the present invention, the air guide part includes an air guide layer and a wind sleeve film, and the wind sleeve film covers the air guide layer; an installation groove is opened on the air guide layer, and the shell assembly is arranged in the installation groove, and the second airflow exchange port is connected with the internal space of the air guide layer; the wind sleeve film is provided with ventilation holes on the side close to the supporting layer, and the ventilation holes are correspondingly connected with the ventilation duct, and the wind sleeve film is provided with a first installation hole corresponding to the installation groove on the side away from the supporting layer for accommodating the shell assembly.

[0015] According to the technical solution provided by the present invention, the air guide part includes an air guide groove, which is connected to the ventilation duct, and a sealing layer is provided on the side of the air guide groove away from the supporting layer, and a second mounting hole is provided on the sealing layer. The shell assembly is arranged in the air guide groove through the second mounting hole, and the second airflow exchange port and the air guide groove are connected to the internal space formed by the sealing layer.

[0016] The beneficial effects of the present invention are: The fan housing is installed on the car seat, and the interior of the housing has a first space, a second space, a second airflow exchange port and a first airflow exchange port that are interconnected. The first blade fan assembly is installed in the first space, and the second blade fan assembly is installed in the second space, wherein the first impeller and the second impeller are coaxially arranged and arranged in opposite directions. Furthermore, when working, the first blade fan assembly and the second blade fan assembly are controlled to work respectively to complete the two functions of suction and blowing, and the structure is simple and convenient to control. Since there is only one path for gas flow, air leakage is not easy to occur; therefore, there is sufficient gas flow, thereby producing a good ventilation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 An exploded view of a combined blade fan with bidirectional unequal impellers; Figure 2 is a schematic diagram of a fan in a first embodiment; Figure 3 A front view of the fan in the first embodiment; Figure 4 is a cross-sectional view of a fan in a first embodiment; Figure 5 is a schematic diagram of a fan in a second embodiment; Figure 6 is a front view of the fan in the second embodiment; Figure 7 is a cross-sectional view of a fan in a second embodiment; Figure 8 is a schematic diagram of a fan when the first impeller is wider than the second impeller; Fig. 9 is a front view of a fan in a third embodiment; Fig.10 is a cross-sectional view of a fan in a third embodiment; Fig.11 A schematic diagram of a first embodiment in which a protrusion is installed on a supporting layer; Fig.12 is a schematic diagram of a second embodiment in which a protrusion is installed on a supporting layer; Fig.13 is a schematic diagram of a third embodiment in which a protrusion is installed on a supporting layer; Fig.14 This is the front view of the fan when the diameter of the raised portion is equal to that of the lower housing; Fig.15 is a cross-sectional view of the fan when the diameter of the raised portion is equal to that of the lower housing; Fig.16 It is a schematic diagram of the fan being installed on the supporting layer when the diameter of the protrusion is equal to that of the lower shell; Among them: 1. Shell assembly; 2. Second airflow exchange port; 3. First airflow exchange port; 4. Second impeller assembly; 5. First impeller assembly; 6. Second impeller; 7. First impeller; 8. Raised portion; 9. Support layer; 10. Mounting groove; 11. Wind guide layer; 12. Wind bag membrane; 13. Upper shell; 14. Middle shell; 15. Lower shell; 16. Ventilation duct. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It should also be noted that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0020] Example 1 Please refer to Figure 1-2 The present invention provides a combined blade fan with bidirectional unequal impellers, which is used in a ventilation system of a car seat, comprising: A shell component 1, wherein the shell component 1 has a first space and a second space that are interconnected; the shell component 1 has a first airflow exchange port 3 and a second airflow exchange port 2; the first space is connected to the first airflow exchange port 3, and the second space is connected to the second airflow exchange port 2; The first airflow exchange opening 3 is larger than the second airflow exchange opening 2, so as to increase the flow rate of the gas.

[0021] The first airflow exchange port 3 is connected to the rear cavity inside the car seat, and the second airflow exchange port 2 is connected to a ventilation component inside the car seat for connecting the side of the car seat close to the occupant and the side away from the occupant.

[0022] A first blade fan assembly 5 and a second blade fan assembly 4, wherein the first blade fan assembly 5 is installed in the first space; the second blade fan assembly 4 is installed in the second space; the first blade fan assembly 5 and the second blade fan assembly 4 work independently; When the first blade fan assembly 5 is actively working, the air flows from the side of the car seat close to the occupant through the second airflow exchange port 2, the second space, the first space and the first airflow exchange port 3 to the side of the car seat away from the occupant, thereby achieving an air suction effect; When the second blade fan assembly 4 is actively working, the air flows from the side of the car seat away from the occupant through the first airflow exchange port 3, the first space, the second space and the second airflow exchange port 2 to the side of the car seat close to the occupant, thereby achieving a blowing effect; The first blade fan assembly 5 includes a first impeller 7; the second blade fan assembly 4 includes a second impeller 6; The first impeller 7 and the second impeller 6 have different thicknesses along the directions in which the rotation axes of the first impeller 7 and the second impeller 6 extend.

[0023] Furthermore, the thickness of the first impeller 7 along the direction in which the rotation axis thereof extends is greater than the thickness of the second impeller 6 along the direction in which the rotation axis thereof extends.

[0024] In this embodiment, the blade fan assembly includes: an external shell assembly 1, a stator fixedly installed in the internal space of the shell assembly 1, an impeller (as a rotor) installed in the internal space of the shell assembly 1, and a circuit board electrically connected to the stator through a PIN pin.

[0025] When the first impeller 7 and the second impeller 6 have the same width, since the first impeller 7 is thicker, a larger amount of wind is generated during rotation, and the passengers feel more comfortable.

[0026] Specifically, during operation, two fan components are controlled separately to complete the two functions of air suction and air blowing, and the structure is simple and convenient to control.

[0027] The design of the impellers for both fan assemblies includes: The length of the first impeller 7 along the direction perpendicular to the rotation axis is smaller than the length of the second impeller 6 along the direction perpendicular to the rotation axis.

[0028] refer to Figure 5-7 , which is the case where the first impeller 7 is thick but the second impeller 6 is wide. The purpose of this structure is to increase the circumference of the second airflow exchange port 2. Under the same thickness of the second impeller 6, the longer the length, the larger the port for exchanging air with the outside world, and the higher the ventilation efficiency.

[0029] The thicker first impeller 7 of the first impeller fan assembly 5 can drive more air to move during the rotation process, thereby increasing air circulation and improving the ventilation effect.

[0030] Existing suction fans are all set up on the side facing away from the passengers. The air needs to pass through the air holes on the car seat support layer and the air guide layer before entering the fan and finally being discharged to the outside. The overall air path is long, resulting in a small flow rate during suction, and thus a poor suction effect.

[0031] In this embodiment, the first airflow exchange opening 3 is larger than the second airflow exchange opening 2, and is used to increase the gas flow rate during air suction, thereby ultimately making the air suction efficiency higher.

[0032] Furthermore, the second impeller 6 and the first impeller 7 are both centrifugal structures, and the second impeller 6 and the first impeller 7 drive the gas to move in opposite directions when they rotate; the second airflow exchange port 2 and the first airflow exchange port 3 are both located on the side wall of the shell assembly 1.

[0033] Based on the above structural design, when the centrifugal impeller rotates, the gas is driven from one side of the rotating shaft to the outside of the impeller to complete the function of driving the air flow. In addition, the first impeller 7 is located near the first airflow exchange port 3; the second impeller 6 is located near the second airflow exchange port 2. When the air moves, it will move to the outside of the housing 1 through the first airflow exchange port 3 and the second airflow exchange port 2 respectively.

[0034] Since the first airflow exchange port 3 is located on the side of the car seat away from the occupant, and the second airflow exchange port 2 is located on the side of the car seat close to the occupant, and the rear side of the car seat away from the occupant is also provided with a rear cover, a cavity is formed between the car seat and the rear cover for air flow. The above structural design can realize the air suction and air blowing functions when the two fan components are controlled to work separately.

[0035] Furthermore, the housing assembly 1 comprises: The upper shell 13, the middle shell 14, and the lower shell 15 are connected to each other; the first space is formed between the upper shell 13 and the middle shell 14; the second space is formed between the middle shell 14 and the lower shell 15. The upper shell 13, the middle shell 14, and the lower shell 15 are buckled together, and a first airflow exchange port 3 is formed between the edges of the upper shell 13 and the middle shell 14; and a second airflow exchange port 2 is formed between the edges of the middle shell 14 and the lower shell 15.

[0036] Furthermore, a protrusion 8 is provided on the outer side wall of the middle shell 14 , and the protrusion 8 is used to connect with the support layer 9 to fix the relative position of the shell assembly 1 and the support layer 9 .

[0037] The ventilation system is arranged on the car seat; thus, the fan can be fixed on the car seat to conveniently realize the functions of air suction or air blowing.

[0038] In the first embodiment, reference Figure 2-4 The housing assembly 1 has a protrusion 8 in the form of an annular sheet.

[0039] In the second embodiment, reference Figure 5-7 As shown in the figure, the raised portion 8 can increase the connection area and improve the stability of the connection.

[0040] refer to Figure 8 and Fig.10 , wherein the first impeller 7 in the first impeller fan assembly 5 is wider than the second impeller 6 in the second impeller fan assembly 4; thus, the first airflow exchange port 3 is also larger than the second airflow exchange port 2.

[0041] refer to Figure 9-10 , respectively, the protrusion 8 is located on the side of the middle shell 14 close to the first airflow exchange port 3, and close to the side of the second airflow exchange port 2. When the protrusion 8 is close to the side of the second airflow exchange port 2, the protrusion 8 protrudes from the upper shell 13.

[0042] Based on the above structural design, the raised portion 8 can be easily connected to air guide portions of various structures.

[0043] The additional protrusion structure on the protrusion 8 has various shapes, for details, refer to Figure 8-10 When connecting to other parts, the shape of the protruding portion 8 that is convenient for connection can be freely selected according to the shape of other parts to complete the installation.

[0044] The position of the protrusion 8 on the middle shell 14 can be designed according to actual needs, as long as it is ensured to be between the second airflow exchange port 2 and the first airflow exchange port 3 .

[0045] refer to Fig.11, is a structural diagram of the protrusion 8 in another embodiment, and a schematic diagram of the protrusion 8 installed on the supporting layer 9.

[0046] refer to Figure 12-13 , is a structural diagram of another embodiment of the protrusion 8, and a schematic diagram of the protrusion 8 installed on the supporting layer 9.

[0047] The three embodiments respectively show various structural designs of the protrusion 8, which is used to connect with the side of the car seat support layer 9 away from the occupant. The relative position between the fan and the seat can be fixed by various different connection methods.

[0048] In some embodiments, reference Figure 14-16 , the diameter of the lower shell 15 is greater than the diameter of the upper shell 13, and the diameter of the raised portion 8 is greater than or equal to the diameter of the lower shell 15; a connecting space is formed between the raised portion 8 and the lower shell 15, which is used to connect with the air guide layer 11 to fix the relative position between the shell assembly 1 and the air guide layer 11; the connection between the shell assembly 1 and the air guide layer 11 is made more stable to reduce the occurrence of falling off due to external force or long-term use.

[0049] In order to be fixedly connected with the air guide layer 11 , a connection space is formed between the protrusion 8 and the lower shell 15 . Therefore, the diameter of the protrusion 8 is set to be greater than or equal to the diameter of the lower shell 15 .

[0050] Single suction and blowing have advantages and disadvantages.

[0051] Advantages of air suction: mild wind feeling and fast cooling rate; Disadvantages: weak wind feeling.

[0052] Advantages of blowing air: strong wind feeling; Disadvantages: hot air is blown out when the seat back ventilation system starts working.

[0053] The fan of the present invention can be used to manually switch between blowing and suction modes, or to automatically switch between blowing and suction modes through system control.

[0054] You can first suck air, using the advantage of large air volume to quickly cool down; then blow air, using the characteristics of blowing air to improve the wind feeling.

[0055] Example 2 The present invention also provides a car seat, comprising: A combined blade fan with bidirectional unequal impellers as described in the above embodiment; The supporting layer 9 is used to connect the space close to the occupant side and the space away from the occupant side; the supporting layer 9 is provided with an air guide portion on the side away from the occupant; the shell assembly 1 is connected to the air guide portion, and the second airflow exchange port 2 is connected to the internal space of the air guide portion.

[0056] Furthermore, the wind guide part includes an wind guide layer 11 and a wind sleeve membrane 12, and the wind sleeve membrane 12 covers the wind guide layer 11; a mounting groove 10 is opened on the wind guide layer 11, and the shell assembly 1 is arranged in the mounting groove 10, and the second airflow exchange port 2 is connected with the internal space of the wind guide layer 11; the wind sleeve membrane 12 is provided with ventilation holes on a side close to the supporting layer 9, and the ventilation holes are correspondingly connected with the ventilation duct 16; the wind sleeve membrane 12 is provided with a first mounting hole corresponding to the mounting groove 10 on a side away from the supporting layer 9, which is used to accommodate the shell assembly 1.

[0057] Furthermore, the air guide portion includes an air guide groove, which is connected to the ventilation duct 16, and a sealing layer is provided on the side of the air guide groove away from the supporting layer 9, and a second mounting hole is provided on the sealing layer, and the shell assembly 1 is arranged in the air guide groove through the second mounting hole, and the second airflow exchange port 2 and the air guide groove are connected to the internal space formed by the sealing layer.

[0058] The above description is only a preferred embodiment of the present invention and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present invention is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present invention (but not limited to) to form a technical solution.

Claims

1. A combined fan with bidirectional unequal impellers, used in the ventilation system of car seats, characterized in that: include: A shell component (1), wherein the shell component (1) has a first space and a second space which are connected to each other; the shell component (1) has a first airflow exchange port (3) and a second airflow exchange port (2); the first space is connected to the first airflow exchange port (3), and the second space is connected to the second airflow exchange port (2); a first blade fan assembly (5) and a second blade fan assembly (4), wherein the first blade fan assembly (5) is installed in the first space; the second blade fan assembly (4) is installed in the second space; the first blade fan assembly (5) and the second blade fan assembly (4) work independently; When the first blade fan assembly (5) is actively working, gas flows from the side of the car seat close to the occupant through the second airflow exchange port (2), the second space, the first space and the first airflow exchange port (3) to the side of the car seat away from the occupant; When the second blade fan assembly (4) is actively working, the gas flows from the side of the car seat away from the occupant through the first airflow exchange port (3), the first space, the second space and the second airflow exchange port (2) to the side of the car seat close to the occupant; The first impeller fan assembly (5) comprises a first impeller (7); the second impeller fan assembly (4) comprises a second impeller (6); The first impeller (7) and the second impeller (6) have different thicknesses along the direction in which the rotation axes of the first impeller (7) and the second impeller (6) extend.

2. A combined fan with bidirectional unequal impellers according to claim 1, characterized in that: The thickness of the first impeller (7) along the direction in which its rotation axis extends is greater than the thickness of the second impeller (6) along the direction in which its rotation axis extends.

3. A combined fan with bidirectional unequal impellers according to claim 2, characterized in that: The length of the first impeller (7) along a direction perpendicular to the rotation axis is smaller than the length of the second impeller (6) along a direction perpendicular to the rotation axis.

4. A combined fan with bidirectional unequal impellers according to claim 1, characterized in that: The second impeller (6) and the first impeller (7) are both of a centrifugal structure with blades being moved, and the second impeller (6) and the first impeller (7) drive the gas to move in opposite directions when they rotate; the second airflow exchange port (2) and the first airflow exchange port (3) are both located on the side wall of the shell assembly (1).

5. The combined blade fan with bidirectional unequal impellers according to claim 1, characterized in that: The housing assembly (1) comprises: An upper shell (13), a middle shell (14), and a lower shell (15) are connected to each other; the first space is formed between the upper shell (13) and the middle shell (14); and the second space is formed between the middle shell (14) and the lower shell (15).

6. A combined fan with bidirectional unequal impellers according to claim 5, characterized in that: The outer side wall of the middle shell (14) is provided with a protrusion (8), and the protrusion (8) is used to connect with the support layer (9) to fix the relative position of the shell component (1) and the support layer (9).

7. A combined fan with bidirectional unequal impellers according to claim 6, characterized in that: The diameter of the lower shell (15) is greater than the diameter of the upper shell (13), and the diameter of the raised portion (8) is greater than or equal to the diameter of the lower shell (15); a connection space is formed between the raised portion (8) and the lower shell (15), and is used to connect to the air guide layer (11) and fix the relative position between the shell assembly (1) and the air guide layer (11).

8. A vehicle seat ventilation system, characterized in that: include: A combined blade fan with bidirectional unequal impellers as described in any one of claims 1 to 7; A support layer (9), wherein a ventilation duct (16) is provided on the support layer (9), and the ventilation duct (16) is used to connect a space on a side of the support layer (9) close to an occupant and a space on a side away from the occupant; an air guide portion is provided on the side of the support layer (9) away from the occupant; the shell assembly (1) is connected to the air guide portion, and the second airflow exchange port (2) is connected to the internal space of the air guide portion.

9. The vehicle seat ventilation system according to claim 8, characterized in that: The wind guide portion comprises a wind guide layer (11) and a wind sleeve membrane (12), wherein the wind sleeve membrane (12) covers the wind guide layer (11); a mounting groove (10) is provided on the wind guide layer (11), the shell assembly (1) is arranged in the mounting groove (10), and the second airflow exchange port (2) is connected to the internal space of the wind guide layer (11); a ventilation hole is provided on a side of the wind sleeve membrane (12) close to the supporting layer (9), wherein the ventilation hole is connected to the ventilation duct (16) correspondingly, and a first mounting hole is provided on a side of the wind sleeve membrane (12) away from the supporting layer (9) corresponding to the mounting groove (10), for accommodating the shell assembly (1).

10. The vehicle seat ventilation system according to claim 8, characterized in that: The air guide portion comprises an air guide groove, the air guide groove is in communication with the ventilation duct (16), a sealing layer is provided on a side of the air guide groove away from the supporting layer (9), a second mounting hole is provided on the sealing layer, the housing assembly (1) is arranged in the air guide groove through the second mounting hole, and the second airflow exchange port (2) and the air guide groove are in communication with an internal space formed by the sealing layer.

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