Seat ventilation device

Abstract

The utility model discloses a seat ventilation device which comprises a fan and an air bag, the air bag is provided with an inner cavity and an air bag connector communicated with the inner cavity, and the fan comprises a shell, a first air inlet, a second air inlet, a first air outlet and a second air outlet. The centrifugal fan body is arranged in the first shell, the first shell is provided with an air inlet and an air outlet, and the centrifugal fan body rotates to enable airflow to enter the first shell from the air inlet and flow out from the air outlet; a first air channel and a second air channel are defined between the second shell and the first shell; a near port of the first air passage is flush with a near port of the second air passage to form a fan interface; a switching component with an air guide port and a driving mechanism used for driving the switching component to move so as to enable the air guide port of the switching component to be selectively opposite to the near port of the first air channel or the near port of the second air channel are arranged at the fan interface; and the switching part is hermetically connected with the air bag interface.

Description

Technical Field

[0001] The utility model relates to the technical field of seat ventilation, in particular to a seat ventilation device. Background Art

[0002] The seats of mobile vehicles are typically equipped with ventilation devices. For example, automobile seats are typically equipped with ventilation devices. Conventional ventilation devices typically include an air bag and a fan for blowing or sucking air into the air bag's inner cavity. The air bag is provided with air holes on the bag body facing the front surface of the seat. When the fan blows air into the air bag, the airflow in the air bag is blown toward the occupants through the air holes, thereby providing a ventilation effect for the occupants. When the fan sucks air into the air bag, under the action of negative pressure, the airflow near the seat passes through the occupants and returns through the air holes to the air bag, thereby providing another ventilation effect for the occupants. In some high-end mobile vehicles, the ventilation device has both of the above ventilation modes and effects. Ventilation devices with both of these ventilation modes and effects are typically equipped with two fans, one for blowing air into the air bag and the other for sucking air into the air bag. However, the configuration of two fans inevitably increases the cost of the ventilation device and increases the installation space occupied by the ventilation device. Utility Model Content

[0003] In view of the above technical problems existing in the prior art, the utility model provides a seat ventilation device.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A seat ventilation device includes a fan and an air bag, wherein the air bag has an inner cavity defined by a bag body, air holes are arranged on the bag body facing the seat, and the air bag has an air bag interface communicating with the inner cavity for connecting to the fan.

[0006] The fan comprises:

[0007] a housing comprising a first housing and a second housing;

[0008] A centrifugal fan body is disposed in the first housing, wherein:

[0009] An air inlet is provided at the center of the top wall of the first shell, and an air outlet is provided on the side wall of the first shell. The centrifugal fan body rotates so that air flows into the first shell from the air inlet and out from the air outlet.

[0010] A first air duct and a second air duct are defined between the second shell and the first shell; the distal end of the first air duct and the distal end of the second air duct are respectively connected to the air outlet and the air inlet; the proximal end of the first air duct is flush with the proximal end of the second air duct to form a fan interface; wherein:

[0011] The fan interface is provided with a switching component having an air guide port and a driving mechanism for driving the switching component to move so that the air guide port of the switching component is selectively opposite to the proximal end port of the first air duct or the proximal end port of the second air duct; the switching component is sealed and connected to the air bag interface.

[0012] Preferably, the proximal end portion of the first air channel and the proximal end portion of the second air channel are arranged in the axial direction of the housing.

[0013] Preferably, the proximal end of the first air channel and the proximal end of the second air channel are arranged in a transverse direction of the housing.

[0014] Preferably, the proximal end of the first air channel and the proximal end of the second air channel are rectangular openings, the switching component is a rectangular frame structure, and the air guide port is an air port with a rectangular cross-section.

[0015] Preferably, the driving mechanism includes a nut embedded in the switching component, a screw rod passing through the nut, and a driver driving the screw rod to rotate.

[0016] Preferably, the first air channel and the second air channel extend radially and are arranged in parallel.

[0017] Preferably, the air bag interface is located at the edge of the air bag.

[0018] Compared with the prior art, the seat ventilation device disclosed in the present invention has the following beneficial effects:

[0019] The ventilation device provided by the utility model can realize blowing ventilation and suction ventilation by using one fan.

[0020] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention.

[0021] The overview of various implementations or examples of the technology described in this utility model is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar components in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar components. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the description and claims, serve to illustrate the embodiments of the utility model. Where appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the fan in the seat ventilation device provided in an embodiment of the present utility model.

[0024] Figure 2 The present invention is a three-dimensional cross-sectional view of a fan in a seat ventilation device provided in an embodiment of the present invention.

[0025] Figure 3 This is a main sectional view of the seat ventilation device provided by an embodiment of the present utility model (the seat ventilation device is in a state of blowing air toward the air bag).

[0026] Figure 4 This is a main sectional view of the seat ventilation device provided by an embodiment of the present utility model (the seat ventilation device is in a state of sucking air into the air bag).

[0027] Reference numerals:

[0028] 100-fan; 10-housing; 11-first housing; 111-air outlet; 112-air inlet; 12-second housing; 20-centrifugal fan body; 31-first air duct; 311-first port; 32-second air duct; 321-second port; 40-switching component; 41-air guide port; 50-driving mechanism; 51-screw; 52-nut; 53-driver; 200-air bag; 201-air bag interface; 202-bag body; 203-air hole; 204-support component; 205-inner cavity. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the usual meanings understood by persons of ordinary skill in the field to which this utility model belongs. The words "first", "second" and similar terms used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0031] In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of known functions and known components.

[0032] An embodiment of the utility model discloses a seat ventilation device, which is preferably installed on the back of a vehicle seat to achieve a ventilation effect by blowing / sucking airflow so that the airflow passes through the seat occupant.

[0033] like Figures 1 to 4 As shown, the ventilation device includes a fan 100, an air bag 200, a switching component 40, and a drive mechanism 50. The air bag 200 is surrounded by a bag body 202, thereby forming an inner cavity 205. Air holes 203 are provided in the bag body 202 facing the seat, through which air can flow out of the air bag 200 or into the bag body 202. An air bag interface 201 is provided at the edge of the air bag 200, communicating with the inner cavity 205 of the air bag 200. The air bag interface 201 is connected to the fan 100 via the switching component 40, allowing the fan 100 to supply air into or draw air from the air bag 200. In some preferred structures, the air bag 200 is further provided with a support component 204 having numerous apertures to maintain the inner cavity 205 of the air bag 200. In some preferred structures, at least the area where the air bag interface 201 is connected to the main part of the air bag 200 is configured to be flexible, so that after the main part of the air bag 200 is positioned, the driving mechanism 50 can drive the air bag interface 201 to move relative to the main part.

[0034] The fan 100 includes a housing 10 and a centrifugal fan body 20. The housing 10 includes a first housing 11 and a second housing 12. The first housing 11 is configured as a volute structure to cooperate with the centrifugal fan body 20 to form the centrifugal fan 100. Specifically, an air inlet 112 is configured in the middle of the top wall of the first housing 11, and an air outlet 111 is configured on the side wall of the first housing 11. When the centrifugal fan body 20 rotates, the centrifugal fan body 20 cooperates with the first housing 11, allowing air to enter through the air inlet 112 and exit through the air outlet 111.

[0035] The second shell 12 and the first shell 11 define a first air duct 31 and a second air duct 32. The first air duct 31 and the second air duct 32 extend in a radial direction, and the distal end (or inner end) of the first air duct 31 is connected to the air outlet 111 of the first shell 11, and the distal end (or inner end) of the second air duct 32 is connected to the air inlet 112 of the first shell 11, so that the fan 100 can inhale air through the second air duct 32 and blow air through the first air duct 31.

[0036] The first air duct 31 and the second air duct 32 are parallel and arranged side by side in the axial direction of the shell 10, and the proximal end of the first air duct 31 (may be referred to as the first port 311) and the proximal end of the second air duct 32 (may be referred to as the second port 321) are flush to form a fan interface of the fan 100.

[0037] The proximal end of the switching component 40 is sealedly connected to the air bag interface 201, and the distal end of the switching component 40 is opposite to the fan interface. The switching component 40 has a through-going air guide port 41. The driving mechanism 50 is used to drive the switching component 40 to move in the axial direction of the housing 10, so that the air guide port 41 of the switching component 40 selectively faces the first port 311 of the first air channel 31 or the second port 321 of the second air channel 32. When the air guide port 41 of the switching component 40 faces the first port 311 of the first air channel 31, the first air channel 31 is in communication with the air bag interface 201, and the second air channel 32 is in communication with the outside air through the second port 321. When the air guide port 41 of the switching component 40 faces the second port 321 of the second air channel 32, the second air channel 32 is in communication with the air bag interface 201, and the first air channel 31 is in communication with the outside air through the first port 311. Preferably, the first port 311 of the first air channel 31 and the second port 321 of the second air channel 32 are both configured as rectangular ports, the switching component 40 is configured as a rectangular frame structure, and the air guide port 41 is configured as a rectangular air port matching the ports.

[0038] The driving mechanism 50 includes: a driver 53, a nut 52 and a screw rod 51. The nut 52 is installed on the switching component 40. The screw rod 51 is axially arranged and passes through the nut 52. A micro motor is selected as the driver 53 to drive the screw rod 51 to rotate and drive the switching component 40 to move axially by cooperating with the nut 52, so that the air bag interface 201 is selectively connected to the first air duct 31 and the second air duct 32.

[0039] The working process of the above-mentioned ventilation device is introduced below.

[0040] like Figure 3 As shown, if the ventilation device is required to ventilate the occupants in a blowing manner, the drive mechanism 50 is used to align the air guide port 41 of the switching component 40 with the first port 311 of the first air channel 31. This causes the first air channel 31 to communicate with the air bag interface 201, and the second air channel 32 to communicate with the outside air, and the centrifugal blades are activated. In this manner, the outside airflow enters the second air channel 32 through the second port 321 of the second air channel 32 and enters the first housing 11 through the air inlet 112. The airflow then flows out through the air outlet 111 and enters the inner cavity 205 of the air bag 200 through the first air channel 31. The airflow then passes through the air holes 203 of the bag body 202 and the internal passage of the seat, blowing from the front side of the seat toward the occupant, thereby achieving a blowing ventilation effect.

[0041] like Figure 4 As shown, if the ventilation device is required to ventilate the occupants using a suction-type ventilation mechanism, the drive mechanism 50 is used to align the air guide port 41 of the switching component 40 with the second port 321 of the second air duct 32. This connects the second air duct 32 to the air bag interface 201, and the first air duct 31 to the outside air, and the centrifugal blades are activated. In this manner, air in the air bag 200 flows along the second air duct 32 and through the air inlet 112 to the first housing 11. The air then flows out of the air outlet 111, through the first air duct 31, and out of the first port 311 into the outside air. This process creates a negative pressure within the air bag 200, forcing the air around the front of the seat to form a flow that flows through the seat's internal passages and the air holes 203 of the air bag 200 into the inner cavity 205 of the air bag 200, achieving a suction-type ventilation effect.

[0042] In addition, although exemplary embodiments have been described in the present invention, the scope includes any and all embodiments based on the present invention with equivalent elements, modifications, omissions, combinations (e.g., solutions that cross various embodiments), adaptations, or changes. The elements in the claims are to be interpreted broadly based on the language used in the claims and are not limited to the examples described in this specification or during the prosecution of this application, which examples are to be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered as examples only, and the true scope and spirit are indicated by the following claims and the full scope of their equivalents.

[0043] The above description is intended to be illustrative rather than restrictive. For example, the above examples (or one or more of their solutions) can be used in combination with each other. For example, a person of ordinary skill in the art may use other embodiments when reading the above description. In addition, in the above-mentioned specific embodiments, various features can be grouped together to simplify the utility model. This should not be interpreted as an intention that a disclosed feature that is not required to be protected is necessary for any claim. On the contrary, the subject matter of the utility model may be less than all the features of a specific disclosed embodiment. Thus, the following claims are incorporated into the specific embodiments as examples or embodiments, wherein each claim is independently a separate embodiment, and it is considered that these embodiments can be combined with each other in various combinations or arrangements. The scope of the utility model should be determined with reference to the appended claims and the full scope of equivalents to which these claims are entitled.

[0044] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the spirit and scope of protection of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present invention.

Claims

1. A seat ventilation device, comprising a fan and an air bag, wherein the air bag has an inner cavity defined by a bag body, air holes are arranged on the bag body facing the seat, and the air bag has an air bag interface communicating with the inner cavity for connecting to the fan, characterized in that: The fan comprises: a housing comprising a first housing and a second housing; A centrifugal fan body is disposed in the first housing, wherein: An air inlet is provided at the center of the top wall of the first shell, and an air outlet is provided on the side wall of the first shell. The centrifugal fan body rotates so that air flows into the first shell from the air inlet and out from the air outlet. A first air duct and a second air duct are defined between the second shell and the first shell; the distal end of the first air duct and the distal end of the second air duct are respectively connected to the air outlet and the air inlet; the proximal end of the first air duct is flush with the proximal end of the second air duct to form a fan interface; wherein: The fan interface is provided with a switching component having an air guide port and a driving mechanism for driving the switching component to move so that the air guide port of the switching component is selectively opposite to the proximal end port of the first air duct or the proximal end port of the second air duct; the switching component is sealed and connected to the air bag interface.

2. The seat ventilation device according to claim 1, characterized in that: The proximal end of the first air channel and the proximal end of the second air channel are arranged in the axial direction of the housing.

3. The seat ventilation device according to claim 1, characterized in that: The proximal end of the first air channel and the proximal end of the second air channel are arranged in a transverse direction of the housing.

4. The seat ventilation device according to claim 1, characterized in that: The proximal end of the first air channel and the proximal end of the second air channel are rectangular openings, the switching component is a rectangular frame structure, and the air guide port is an air port with a rectangular cross-section.

5. The seat ventilation device according to claim 1, characterized in that: The driving mechanism includes a nut embedded in the switching component, a screw rod passing through the nut, and a driver driving the screw rod to rotate.

6. The seat ventilation device according to claim 1, characterized in that: The first air channel and the second air channel extend radially and are arranged in parallel.

7. The seat ventilation device according to claim 1, characterized in that: The air bag interface is located at the edge of the air bag.

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