CN211808959U - Air quality detection device for vehicle - Google Patents

Abstract

An air quality detection device for a vehicle comprises a shell, a first air inlet channel and a second air outlet channel, wherein the shell is provided with a containing cavity, an air duct, an air inlet channel communicated with the air duct and an air outlet channel communicated with the air duct, the air duct further comprises a main air duct, a branch air duct and a detection air duct, the branch air duct is positioned outside the main air duct, and the main air duct and the branch air duct are respectively communicated with the detection air duct; the air detection assembly is arranged in the accommodating cavity and used for detecting the air quality of the air in the detection air channel; the air driving assembly is arranged in the accommodating cavity and is used for driving air to flow in the air channel; and the air driving assembly and the air detection assembly are electrically connected to the circuit board assembly respectively.

Description

Air quality detection device for vehicle

Technical Field

The utility model relates to an air quality detection field further relates to an automobile-used air quality detection device.

Background

With the development of science and technology, the living standard of people is greatly developed, vehicles become indispensable travel tools in people's lives, are closely related to the lives of people, and bring great convenience to people's travel. On the other hand, with the increase of vehicles, the air quality is directly or indirectly reduced due to the large amount of exhaust gas discharged by the vehicles, and the respiratory health of people is greatly influenced. At present, various measures and devices for dealing with air pollution are produced in order to deal with increasingly poor air quality and reduce the influence of air pollution on the respiratory health of people. However, as will be understood by those skilled in the art, the air quality detection is the basis and the crucial step in dealing with the air pollution problem, and only after people know the air quality, can a targeted precaution be taken according to the current air quality, so as to better deal with the air pollution and ensure the respiratory health of people.

The air quality detection devices on the market are various, and people can clearly acquire the air quality in an indoor environment or an atmospheric environment and take targeted countermeasures. It will be appreciated by those skilled in the art that when a person is inside a vehicle, the person is in a relatively closed environment isolated from the outside environment, and the person cannot obtain the air quality inside the vehicle from information such as an atmospheric air quality forecast. On the other hand, when the vehicle is in a high-speed driving state, even if the vehicle interior is communicated with the outside atmosphere, there is a certain difference in the air quality in the environment of the vehicle interior space and the outside atmosphere.

At present, a handheld air quality detection device is also available in the market, and the handheld air quality detection device needs to be carried by a user and needs to be operated by the user in a handheld mode when air quality detection is carried out. When using the handheld air quality detection device, the user can not obtain the air quality in the vehicle in real time, and especially when the vehicle driver uses the handheld air quality detection device to detect the air quality in the vehicle during the vehicle driving process, the user may cause great danger to the driving.

Disclosure of Invention

An object of the utility model is to provide an air quality detection device for the whole car, wherein the two wind channels of air quality detection device for the car to prevent that the particulate matter in the gas from gathering in detecting the wind channel, improve the accuracy that air quality detected.

Another object of the utility model is to provide an air quality detection device for a car, wherein air quality detection device for a car has a main wind channel and a tributary wind channel, the tributary wind channel is located the outside in main wind channel to the particulate matter in the gas that supplies to prevent in the main wind channel is gathering in detecting the wind channel, improves air quality testing result's accuracy.

Another object of the utility model is to provide an air quality detection device for a car, wherein the tributary wind channel surround in the outside in main wind channel to the particulate matter in the gas that supplies to prevent in the main wind channel is gathered in detecting the wind channel, improves the accuracy of air quality testing result.

Another object of the present invention is to provide an air quality detecting device for a vehicle, wherein the air quality detecting device for a vehicle further includes an electromagnetic shielding component, the electromagnetic shielding component is used for reducing the size of the electromagnetic interference generated during the operation of the air quality detecting device for a vehicle.

Another object of the present invention is to provide an air quality detecting device for a vehicle, wherein the air quality detecting device for a vehicle further includes a dustproof assembly, the dustproof assembly is disposed outside the air driving assembly, and is used for making the air driving assembly drives the air to move along a predetermined track, so as to prevent the particles in the air from entering into other areas of the air quality detecting device for a vehicle.

Another object of the present invention is to provide an air quality detecting device for a vehicle, wherein the air quality detecting device for a vehicle further includes a filter assembly, the filter assembly is disposed in the air inlet channel for preventing the object with the preset size and above from entering the air inlet channel.

Another object of the present invention is to provide an air quality detecting device for a vehicle, wherein the air detecting component and the air driving component of the air quality detecting device for a vehicle are respectively disposed on two sides of the circuit board component for reducing the overall size of the air quality detecting device for a vehicle.

Another object of the utility model is to provide an air quality detection device for a car, wherein the inlet channel of air quality detection device for a car and the runner of giving vent to anger outwards extend from the same side of casing respectively, so that being connected of air quality detection device for a car and external pipeline reduces air quality detection device for a car and the shared space of external installation are convenient for air quality detection device for a car's installation.

Another object of the utility model is to provide an air quality detection device for the whole car, wherein the size of the income gas port in automobile-used air quality detection device's main wind channel is greater than the size of the income gas port in tributary wind channel to supply to reduce and detect the gaseous volume of wind channel inner wall contact, reduce the particulate matter in the gas and gather in detecting the wind channel.

Another object of the utility model is to provide an air quality detection device for a car, wherein air quality detection device for a car simple structure, convenient to use, detection precision are high.

Accordingly, in order to achieve at least one of the above objects, the present invention provides an air quality detecting device for a vehicle, comprising:

a housing having a receiving chamber, an air duct, an air inlet channel communicated with the air duct, and an air outlet channel communicated with the air duct, wherein the air duct further includes a main air duct, a branch air duct, and a detection air duct, the branch air duct is located outside the main air duct, and the main air duct and the branch air duct are respectively communicated with the detection air duct;

the air detection assembly is arranged in the accommodating cavity and used for detecting the air quality of the air in the detection air channel;

the air driving assembly is arranged in the accommodating cavity and is used for driving air to flow in the air channel; and

and the air driving assembly and the air detection assembly are electrically connected to the circuit board assembly respectively.

In some preferred embodiments of the present invention, the air duct further includes an air blowing duct, the air blowing duct communicates with the air inlet duct, and the air blowing duct communicates with the main air duct and the branch air duct, respectively, a part of the air in the air blowing duct is suitable for entering the main air duct, and another part of the air is suitable for entering the branch air duct.

In some preferred embodiments of the present invention, the branch air duct further includes two branch air outlet channels, two branch air outlet channels are respectively located at two sides of the main air duct, and two branch air outlet channels are respectively communicated with the detection air duct.

In some preferred embodiments of the present invention, the branch air duct further includes a branch air inlet duct, the branch air inlet duct communicates with two respectively the branch air outlet duct, and the branch air inlet duct communicates with the air blowing duct, the gas in the air blowing duct is suitable for passing through the branch air inlet duct enters into two the branch air outlet duct.

In some preferred embodiments of the present invention, the size of the branch air duct inlet of the branch air intake duct is smaller than the size of the main air duct inlet of the main air duct.

In some preferred embodiments of the present invention, the housing further includes a first air duct wall and a second air duct wall, the first air duct wall and the second air duct wall are respectively disposed with the circuit board assembly stacked layer, the first air duct wall is disposed between the circuit board assembly and the second air duct wall, the branch inlet air duct is formed between the first air duct wall and the circuit board assembly, the main air duct and the branch outlet air duct is formed between the first air duct wall and the second air duct wall.

In some preferred embodiments of the present invention, the first air duct wall further has a first communication hole and a second communication hole, the first communication hole communicates with the branch air outlet duct and the branch air inlet duct, and the second communication hole communicates with the branch air inlet duct and the other branch air outlet duct.

In some preferred embodiments of the present invention, the vehicle air quality detecting device further includes a first filtering component, the first filtering component is disposed in the branch inlet duct between the circuit board component and the first duct wall, the first filtering component is used for filtering and entering the gas in the branch inlet duct, the gas in the branch inlet duct is filtered by the first filtering component, and then enters the branch outlet duct through the first communicating hole and the second communicating hole.

The utility model discloses a in some preferred embodiments, two tributary air outlet channel has a tributary gas outlet respectively, tributary gas outlet intercommunication detects the wind channel, main wind channel further has a main wind channel export, main wind channel gas outlet communicate in detect the wind channel, two the positive direction of the central line of tributary gas outlet with the contained angle in the positive direction of the central line of main wind channel gas outlet is the acute angle, and two the tributary gas outlet for the central line symmetry of main wind channel gas outlet, wherein main wind channel gas outlet central line is directional the direction of the central line of detection wind channel is main wind channel gas outlet, tributary gas outlet central line is directional the direction of the central line of detection wind channel is the positive direction of the central line of tributary gas outlet.

In some preferred embodiments of the present invention, the second air duct wall further includes two branch air duct walls, the main air duct is formed between two branch air duct walls, two branch air outlet flow passages are formed at two respectively the outside of the branch air outlet wall, each branch air duct wall is close to one end of the branch air duct opening is provided with two inclined blocking bodies respectively, and the two inclined blocking bodies are formed between the two inclined blocking bodies.

In some preferred embodiments of the present invention, the second air duct wall further includes a mounting groove side wall, and has a mounting groove formed on one side of the mounting groove side wall, the first air duct wall is suitable for being placed in the mounting groove, the height of the mounting groove side wall is higher than that of the supporting side wall, the mounting groove is located above the supporting side wall, the mounting groove side wall and the supporting side wall form a branch air outlet duct therebetween.

In some preferred embodiments of the present invention, the second air duct wall further includes a convex folding body, and has a communicating cavity formed in the convex folding body, the communicating cavity communicates with the first communicating hole and is located at one side of the inner curve of the main air duct, the branch air outlet duct, the convex folding body is connected to the supporting side wall, and protrudes into the main air duct.

In some preferred embodiments of the present invention, the first air duct wall further has a detection opening, the detection opening communicates with the detection air duct, the position of the detection opening is adapted to the position of the air detection assembly, so that the air detection assembly can penetrate through the detection opening to detect the air quality of the air in the detection air duct.

In some preferred embodiments of the present invention, the branch air duct surrounds the outside of the main air duct.

In some preferred embodiments of the present invention, the vehicle air quality detecting device further includes a first filtering component, and the first filtering component is disposed in the branch air channel and is used for filtering particulate matters in the air in the branch air channel.

In some preferred embodiments of the present invention, the vehicle air quality detecting device further includes a main air duct and a branch air duct, the branch air duct surrounds the outside of the main air duct, the main air duct is formed in the main air duct, and the branch air duct is formed in the branch air duct.

In some preferred embodiments of the present invention, the air quality detecting device for vehicle further includes an electromagnetic shielding assembly, and the electromagnetic shielding assembly is disposed on the circuit board assembly for reducing the electromagnetic interference intensity generated by the circuit board assembly during operation.

In some preferred embodiments of the present invention, the air quality detecting device for vehicle further includes a dust-proof component, the dust-proof component is disposed outside the air driving component, and is used for making the air driving component drive the air to move along a predetermined track.

In some preferred embodiments of the present invention, the air quality detecting device for vehicle further includes a second filtering component, the second filtering component is disposed in the air inlet channel for filtering the object with the predetermined size, and preventing the object with the predetermined size and the object with the larger size from entering the air inlet channel.

In some preferred embodiments of the present invention, the vehicle air quality detection device further includes a set of heating components, the heating components are electrically connected to the circuit board assembly for heating the gas in the detection air duct increases the activity of the gas in the detection air duct, so that the distribution of the particles in the gas in the detection air duct is more uniform.

In some preferred embodiments of the present invention, the heating component is a heating resistor.

In some preferred embodiments of the present invention, the air driving assembly and the air detecting assembly are respectively disposed at both sides of the circuit board assembly.

In some preferred embodiments of the present invention, the housing further includes an inlet duct and an outlet duct, the inlet duct is formed in the inlet duct, the outlet duct is formed in the outlet duct, and the inlet duct and the outlet duct respectively extend outward from the same side of the housing.

In some preferred embodiments of the present invention, the main air duct has a bent portion.

Drawings

Fig. 1 is a schematic view of the overall structure of an air quality detection apparatus for a vehicle according to a preferred embodiment of the present invention.

Fig. 2A is an exploded schematic view of an air quality detecting apparatus for a vehicle according to a preferred embodiment of the present invention.

Fig. 2B is an exploded schematic view of an air quality detecting device for a vehicle according to a preferred embodiment of the present invention.

Fig. 2C is an exploded schematic view of an air quality detecting apparatus for a vehicle according to a preferred embodiment of the present invention.

Fig. 2D is an exploded view of an air quality detecting apparatus for a vehicle according to a preferred embodiment of the present invention.

Fig. 3A is a schematic cross-sectional structure diagram of an air quality detecting apparatus for a vehicle according to a preferred embodiment of the present invention.

Fig. 3B is a schematic cross-sectional structure diagram of an air quality detecting apparatus for a vehicle according to a preferred embodiment of the present invention.

Fig. 4A is a schematic cross-sectional structure diagram of an air quality detecting apparatus for a vehicle according to a preferred embodiment of the present invention.

Fig. 4B is a schematic cross-sectional structure diagram of an air quality detecting apparatus for a vehicle according to a preferred embodiment of the present invention.

Fig. 5A is a schematic cross-sectional structure diagram of an air quality detecting apparatus for a vehicle according to a preferred embodiment of the present invention.

Fig. 5B is a schematic partial enlarged structural view of an air quality detecting apparatus for a vehicle according to a preferred embodiment of the present invention.

Fig. 6 is a partial structural schematic diagram of an air quality detecting apparatus for a vehicle according to a preferred embodiment of the present invention.

Fig. 7 is a partial structural schematic view of an air quality detecting apparatus for a vehicle according to a preferred embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a circuit board assembly of an air quality detecting apparatus for a vehicle according to a preferred embodiment of the present invention.

Fig. 9 is a schematic partial sectional view of an air quality detecting apparatus for a vehicle according to a preferred embodiment of the present invention.

Fig. 10 is a schematic view of the overall structure of an air quality detecting apparatus for a vehicle according to a second preferred embodiment of the present invention.

Fig. 11 is an exploded view schematically illustrating an air quality detecting apparatus for a vehicle according to a second preferred embodiment of the present invention.

Fig. 12 is an exploded view schematically illustrating an air quality detecting apparatus for a vehicle according to a second preferred embodiment of the present invention.

Fig. 13 is a schematic cross-sectional view of an air quality detecting apparatus for a vehicle according to a second preferred embodiment of the present invention.

Fig. 14 is a schematic view of an air duct structure of an air quality detecting device for a vehicle according to a second preferred embodiment of the present invention.

Fig. 15 is a schematic structural diagram of an application of the air quality detection device for a vehicle according to a preferred embodiment of the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purpose of limitation.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Referring to the drawings 1 to 15, the present invention provides an air quality detecting device 100 for a vehicle, wherein the air quality detecting device 100 is suitable for being applied to detect the air quality in an internal space 201 of a vehicle 200, so that a user of the vehicle 200 can know the air quality of the internal space 201 of the vehicle 200, and the user of the vehicle 200 can take corresponding measures based on the air quality of the internal space 201.

Referring to fig. 1 to 9 of the specification, in particular, the air quality detecting apparatus 100 for a vehicle further includes a housing 10, the housing 10 has a receiving cavity 110, an air duct 120 located in the receiving cavity 110, an air inlet channel 130 communicated with the air duct 120, and an air outlet channel 140 communicated with the air duct 120, and air is suitable for entering the air duct 120 through the air inlet channel 130 and leaving the air duct 120 through the air outlet channel 140.

The air quality detecting apparatus 100 for vehicle further includes an air detecting unit 20, an air driving unit 30, and a circuit board unit 40. The air detection assembly 20 is disposed in the accommodating cavity 110, and the air detection assembly 20 is used for detecting the air quality of the air in the air duct 120. The air driving assembly 30 is disposed in the accommodating cavity 110, and the air driving assembly 30 is used for driving air to enter the air channel from the air inlet channel 130 and to exit the air channel 120 from the air outlet channel 140. The circuit board assembly 40 is disposed in the accommodating cavity 110, the air quality detecting assembly 20 and the air driving assembly 30 are electrically connected to the circuit board assembly 40, respectively, and the circuit board assembly 40 is adapted to be electrically connected to an external circuit and/or a power source for supplying power to the air detecting assembly 20 and the air driving assembly 30, so that the air detecting assembly 20 and the air driving assembly 30 are in communication with the external circuit and/or the power source.

Specifically, the air duct 120 further includes a detection air duct 1201, a branch flow air duct 1202, a main air duct 1203, an air blowing air duct 1204, and an air outlet air duct 1205, the air blowing air duct 1204 is connected to the air inlet duct 130, the external air is suitable to enter the air blowing air duct 1204 through the air inlet duct 130, the detection air duct 1201 is connected to the air outlet air duct 1205, the air outlet air duct 1205 is connected to the air outlet flow duct 140, the air in the detection air duct 1201 can enter the air outlet flow duct 140 through the air outlet air duct 1205 and exit through the air outlet flow duct 140, the main air duct 1203 is respectively connected to the detection air duct 1201 and the air blowing air duct 1204, and the air in the air blowing air duct 1204 is suitable to enter the detection air duct 1201 through the main air duct 1203. The branch air duct 1202 is located outside the main air duct 1203, the branch air duct 1202 is respectively communicated with the detection air duct 1201 and the blowing air duct 1204, and the gas in the blowing air duct 1204 is suitable for entering the detection air duct 1201 through the branch air duct 1202. That is, in the preferred embodiment, a portion of the air in the blowing duct 1204 is adapted to enter the detection duct 1201 through the main duct 1203, and another portion of the air is adapted to enter the detection duct 1201 through the branch duct 1202. And the air detection assembly 20 is adapted to detect the air quality of the air in the detection air channel 1201, and the gas detected by the air detection assembly 20 in the detection air channel 1201 is adapted to exit through the air outlet flow channel 140. In the preferred embodiment, the external air is adapted to enter the air blowing duct 1204 through the air inlet duct 130, a portion of the air in the air blowing duct 1204 is adapted to enter the main duct 1203, and enter the detection duct 1201 through the main duct 1203, another portion of the air in the air blowing duct 1204 is adapted to enter the branch duct 1202, and enter the detection duct 1201 through the branch duct 1202, the air detection assembly 20 is adapted to detect the air quality of the air entering the detection duct 1201, and the air detected by the air detection assembly 20 in the detection duct 1201 is adapted to enter the air outlet duct 130 through the air outlet duct 1205, and exit through the air outlet duct 130.

The branch air duct 1202 is configured to adjust a path of air in the main air duct 1203 entering the detection air duct 1201, so as to reduce a probability that dust in the air is accumulated on the air detection assembly 20 due to contact with the air detection assembly 20, and improve accuracy of an air quality detection result.

Preferably, in the preferred embodiment, the branch air duct 1202 further includes a branch air inlet duct 12021 and two branch air outlet ducts 12022, the two branch air outlet ducts 12022 are respectively communicated with the branch air inlet duct 12021, and the two branch air outlet ducts 12022 are located at two sides of the main air duct 1203. The two branch air outlet channels 12022 are respectively communicated with the detection air channel 1201, and the gas in the branch air inlet channel 12021 is suitable to enter the detection air channel 1201 through the two branch air outlet channels 12022. It should be further noted that the air in the two branch outlet air ducts 12022 can enter the detection air duct 1201 together with the air in the main air duct 1203, and when entering the detection air flue 1201, the air in the two branch air outlet air flues 12022 is positioned at two sides of the air in the main air flue 1203, the air in the main air duct 1203 is located at two sides of the air in the two branch air outlet air ducts 12022, so that when entering the detection air flue 1201, the air in the two branch air outlet air flues 12022 is located at two sides of the air in the main air flue 1203, so that the contact area of the gas in the main air duct 1203 and the inner wall of the detection air duct 1202 can be reduced to some extent, therefore, particulate matters in the air in the main air duct 1203 can be prevented from accumulating on the inner wall of the detection air duct 1201, especially in the detection area of the air detection assembly 20, and the accuracy of the air quality detection result can be improved to a certain extent.

It should be understood by those skilled in the art that when only the gas in the main duct 1203 is introduced into the detection duct 1201, the particulate matters in the gas in the main duct 1203 may be accumulated on the inner wall of the detection duct 1201, and the accuracy of the air quality detection result is affected, for example, when the particulate matters in the gas in the main duct 1203 are accumulated on the inner wall of the detection duct 1201 in a large amount, the particulate matters in the air entering the detection duct 1201 are reduced, so that the detection result of the air detection assembly 20 is lower than the actual particulate matter content in the air. When the gas in the main duct 1203 enters the detection duct 1201, and the particulate matters accumulated in the detection duct 1201 enter the gas in the detection duct 1201, the content of the particulate matters in the air is increased, so that the detection result of the air detection assembly 20 is greater than the actual content of the particulate matters in the air. Therefore, when only the air in the main duct 1203 enters the detection duct 1201, the accuracy of the air quality detection result is greatly affected. In the preferred embodiment, two branch air outlet channels 12022 are disposed on two sides of the main air duct 1203, so that two layers of buffer air are formed on two sides of the air in the main air duct 1203, the contact between a large amount of air in the main air duct 1203 and the inner wall of the detection air duct 1201 is avoided, the probability that particulate matters in the air are accumulated on the inner wall of the detection air duct 1201 is reduced, and the accuracy of the air quality detection result is improved.

Further, the size of the branch air duct 1202 is smaller than the size of the main air duct 1203, that is, the air flow in the main air duct 1203 is larger than the air flow in the branch air duct 1202, so that when the main air duct 1203 and the air in the branch air duct 1202 enter the detection air duct 1201 together, only a small amount of air in the branch air duct 1202 contacts with the inner wall of the detection air duct 1201 and/or the detection area of the air detection assembly 20, and therefore a large amount of particulate matters in the air are not accumulated on the inner wall of the detection air duct 1201, and the accuracy of the air quality detection result is improved.

Specifically, the air blowing duct 1204 is respectively communicated with the branch air inlet duct 12021 and the main air duct 1203, a part of air in the air blowing duct 1204 is suitable for entering the branch air inlet duct 12021, another part of air is suitable for entering the main air duct 1203, and the volume of air entering the main air duct 1203 is larger than that of air entering the branch air inlet duct 12021.

Referring to fig. 3A and 4A of the specification, preferably, in the preferred embodiment, the circuit board assembly 40 is disposed in the accommodating cavity 110, and divides the accommodating cavity 110 into a first accommodating cavity 1101 and a second accommodating cavity 1102, where the first accommodating cavity 1101 and the second accommodating cavity 1102 are respectively located at upper and lower sides of the circuit board assembly 40. The air driving assembly 30 is disposed in the first accommodating cavity 1101, and the air detecting assembly 20 is disposed in the second accommodating cavity 1102, that is, the air driving assembly 30 and the air detecting assembly 20 are respectively disposed at the upper and lower sides of the circuit board assembly 30.

The air blowing duct 1204 is located in the first accommodating chamber 1101, and the detection duct 1201, the branch duct 1202, and the main duct 1203 are located in the second accommodating chamber 1102. The air driving assembly 30 is disposed in the blowing air duct 1204, and the air driving assembly 30 is configured to drive the external air to enter the blowing air duct 1204 through the inlet air duct 130, enter the detection air duct 1201 through the branch air duct 1202 and the main air duct 1203, and exit through the outlet air duct 130 after the air quality is detected by the air detection assembly 20.

Preferably, in the preferred embodiment, the air driving assembly 30 is a blowing fan, the air driving assembly 30 is capable of blowing the air in the blowing air duct 1204 to the main air duct 1203 and the branch air duct 1202, and forming a negative pressure around the air driving assembly 30, and the outside air is capable of entering the blowing air duct 1204 from the inlet air duct 130 under the action of the air pressure and is continuously blown to the main air duct 1203 and the branch air duct 1202 by the air driving assembly 30, so as to continuously drive the outside air to the air duct 120 and drive the air to leave the air duct 120 through the outlet air flow channel 140. In other preferred embodiments of the present invention, the air driving assembly 30 can be an induced draft fan, the air driving assembly 30 can draw the external air into the air blowing duct 1204 through the air inlet duct 130, and the air continuously enters the main duct 1203 and the branch duct 1202 from the air blowing duct 1204 under the interaction of the air.

Referring to fig. 4B of the specification, the circuit board assembly 40 further has a first vent 410, and the first vent 410 is communicated with the blowing air duct 1204, the main air duct 1203 and the branch air duct 1202, that is, the air in the blowing air duct 1204 can enter the main air duct 1203 and the branch air duct 1202 through the first vent 410.

Specifically, referring to fig. 4B in the specification, after the air in the air blowing duct 1204 passes through the first vent holes 410 of the circuit board assembly 40, a part of the air enters the branch air inlet duct 12021, and another part of the air enters the main duct 1203 and is respectively collected into the detection duct 1201 for detection by the air detection assembly 20. Preferably, the volume of the air in the blowing air duct 1204 entering the main air duct 1203 after passing through the first vent holes 410 of the circuit board assembly 40 is larger than the volume of the branch air inlet duct 1203.

Further, in order to reduce the overall size of the air quality detecting device 100 for a vehicle, the main air duct 1203 has a bending portion, that is, the main air duct 1203 is substantially in an "L" shape, so as to reduce the extension length of the main air duct 1203 in the linear direction, and reduce the overall size of the air quality detecting device 100 for a vehicle. Correspondingly, tributary wind channel 1202 have with the corresponding kink of main wind channel 1203 and corresponding shape, so that reduce the utility model provides a vehicle air quality detection device 100's overall dimension. It should also be noted that the utility model provides a main air duct 1203 with particulate matter that tributary air duct 1203 can also place in the gas accumulates main air duct 1203's the bending of not, prevents the particulate matter accumulation, improves the accurate degree of air quality testing result.

Specifically, the housing 10 further includes a first air duct wall 51 and a second air duct wall 52, and the first air duct wall 51 and the second air duct wall 52 are respectively disposed in the second accommodating cavity 110 in an overlapped manner, that is, the first air duct wall 51 and the second air duct wall 52 are respectively disposed below the circuit board assembly 40 in an overlapped manner. Specifically, the first air duct wall 51 is located between the circuit board assembly 40 and the second air duct wall 52, the main air duct 1203 is located between the first air duct wall 51 and the second air duct wall 52, the branch inlet air duct 12021 of the branch air duct 1202 is formed between the circuit board assembly 40 and the first air duct wall 51, and the two branch outlet air ducts 12022 of the branch air duct 1202 are formed between the first air duct wall 51 and the second air duct wall 52.

Referring to fig. 6 and 7 of the specification, in particular, the second air duct wall 52 further has a mounting groove 520, the shape and size of the first air duct wall 51 are adapted to the shape and size of the mounting groove 520, the first air duct wall 52 is mounted in the mounting groove 520, and two branch outlet air ducts 12022 of the main air duct 1203 and the branch air ducts 1202 are formed between the first air duct wall 51 and the second air duct wall 52. The circuit board assembly 40 is mounted on a side of the first air duct wall 51 away from the second air duct wall 52, and the branch inlet air ducts 12021 of the branch air ducts 1202 are formed between the first air duct wall 51 and the circuit board assembly 40, and the branch inlet air ducts 12021 of the branch air ducts 1202 formed on one side of the first air duct wall 51 are respectively communicated with the two branch outlet air ducts 12022 of the branch air ducts 1202 formed on the other side of the first air duct wall 51. Specifically, referring to the drawings of the specification, the second air duct wall 52 further includes two supporting side walls 521, on one hand, the mounting groove 520 is formed on one side of the two supporting side walls 521 away from the bottom wall of the second air duct wall 52, that is, the first air duct wall 51 is disposed on one side of the two supporting side walls 521 away from the bottom wall of the second air duct wall 52, and the two supporting side walls 521 are located between the bottom walls of the first air duct wall 51 and the second air duct wall 52 and are used for supporting the first air duct wall 51, so that a certain space can be kept between the bottom walls of the first air duct wall 51 and the second air duct wall 52 to form the two branch air outlet air ducts 12022 of the main air duct 1203 and the branch air duct 1202. On the other hand, the two supporting sidewalls 521 are disposed at a certain distance from each other, and the main air duct 1203 passes through a space between the two supporting sidewalls 521. And the two branch outlet air ducts 12022 are respectively formed between the outer sides of the two support side walls 521 and the inner wall of the main air duct 1203. And the height of the two supporting side walls 521 is less than that of the inner wall of the main air duct 1203, so that the mounting groove 520 is formed on one side of the supporting side walls 521 away from the bottom wall of the second air duct wall 52.

Referring to fig. 5A and 5B of the specification, the first air duct wall 51 further has a first communication hole 510 and a second communication hole 511, the first communication hole 510 communicates the branch inlet air duct 12021 and the branch outlet air duct 12022 of the branch air duct 1202, the second communication hole 511 communicates the branch inlet air duct 12021 and the other branch outlet air duct 12022 of the branch air duct 1202, and the gas in the branch inlet air duct 12021 of the branch air duct 1202 is adapted to enter the branch outlet air ducts 12022 through the first communication hole 510 and the second communication hole 511, respectively. Specifically, the first communication hole 510 penetrates the first air passage wall 51, and the second communication hole 511 is formed between the first air passage wall 51 and a side wall of the second air passage wall 51.

Referring to fig. 5B of the specification, the branch air inlet channel 12021 of the branch air channel 1202 further has a branch air channel inlet 611, the branch air channel inlet 611 communicates with the air blowing channel 1204 and the branch air channel 1202, and the air in the air blowing channel 1204 is adapted to enter the branch air inlet channel 12021 through the branch air channel inlet 611. The main air duct 1203 further has a main air inlet 612, the main air inlet 612 communicates the air blowing duct 1204 and the main air duct 1203, and the air in the air blowing duct 1204 is suitable for entering the main air duct 1203 through the main air inlet 611. Specifically, in the preferred embodiment, after the air in the blowing air duct 1204 passes through the first vent 410 of the circuit board assembly 40, a part of the air enters the branch air inlet duct 12021 through the branch air inlet 611, and another part of the air enters the main air duct 1203 through the main air inlet 612. And the size of the main air inlet 612 is larger than that of the branch air inlet 611, that is, the volume of the air in the blowing air duct 1204 entering the main air duct 1203 through the main air inlet 612 is larger than that entering the branch air duct 1202 through the branch air inlet 611.

Further, referring to fig. 5B of the specification, one end of the first air duct wall 51 close to the first vent 410 of the circuit board assembly 40 is bent toward one side of the circuit board assembly 40, so as to reduce the size of the first air duct wall 51 and the branch air duct inlet 611 of the circuit board assembly 40, and increase the volume of the branch air inlet 12021 of the branch air duct 1202.

Further, the two branch air outlet channels 12022 respectively have a branch air outlet 613, the two branch air outlets 613 are respectively communicated with the two branch air outlet channels 12022 and the detection air channel 1201, and the air in the two branch air outlet channels 12022 is respectively suitable for entering the detection air channel 1201 through the two corresponding branch air outlets 613.

The main air duct 1203 further has a main air duct outlet 614, the main air duct outlet 614 connects the main air duct 1203 and the detection air duct 1201, and the air in the main air duct 1203 is suitable for entering the detection air duct 1201 through the main air duct outlet 614. And the two branch air duct outlets 613 are respectively located at two sides of the main air duct outlet 614, so that when air enters the detection air duct 1201, air in the two branch air outlet air ducts 12022 is located at two sides of the air in the main air duct 1203, so as to reduce contact between the air in the main air duct 1203 and an inner wall of the detection air duct 1201 and/or a detection area of the air detection assembly 20, prevent particulate matters in the air in the main air duct 1203 from accumulating on the inner wall of the detection air duct 1201 and/or the detection area of the air detection assembly 20, and improve accuracy of an air quality detection result.

Referring to fig. 5A and 5B in the specification, the vehicle air quality detecting apparatus 100 further includes a first filter assembly 54, the first filter assembly 54 is disposed between the first air duct wall 51 and the circuit board assembly 40, that is, the first filter assembly 54 is disposed between the branch intake air duct 12021 between the first air duct wall 51 and the circuit board assembly 40, and the first filter assembly 54 is configured to filter the air entering the branch intake air duct 12021. Specifically, after entering the branch inlet air duct 12021 through the branch inlet air channel 611, the air in the air blowing duct 1204 is filtered by the first filter assembly 54, and then enters the two branch outlet air ducts 12022 through the first communicating hole 510 and the second communicating hole 511. That is, the air entering the two branch outlet air channels 12022 is clean air, so that when the air entering the two branch outlet air channels 12022 enters the detection air channel 1201 and contacts with the inner wall of the detection air channel 1201, a large amount of particulate matters are prevented from accumulating on the inner wall of the detection air channel 1201 and/or the detection area of the air detection assembly 20, so as to improve the accuracy of the air quality detection result. It should be understood by those skilled in the art that when the gas in the main duct 1203 and the gas in the two branch outlet ducts 12022 enter the detection duct 1201 together, the gas in the two branch outlet ducts 12022 is located outside the gas in the main duct 1203, so that the gas flowing out of the main duct 1203 can be prevented from directly contacting the inner wall of the detection duct 1201, and therefore the particulate matters in the gas flowing out of the main duct 1203 can be prevented from accumulating on the inner wall of the detection duct 1201 and/or the detection area of the air detection assembly 20.

Referring to fig. 6 of the specification, the two branch air outlets 613 of the two branch air outlet channels 12022 have a certain inclination angle, so that when the air in the two branch air outlet channels 12022 exits through the two branch air outlets 613, the air in the two branch air outlet channels 12022 and the air in the main air channel 1203 can smoothly enter the detection air channel 1201 together. Specifically, an included angle between a positive direction of a center line of the branch air outlet 612 and a positive direction of a center line of the main air outlet 614 of the main air duct 1203 is an acute angle, a direction in which the center line of the branch air outlet 612 points to the detection air duct 1201 is the positive direction of the center line of the branch air outlet 612, a direction in which the center line of the main air outlet 614 points to the detection air duct 1201 is the positive direction of the center line of the main air outlet 614, and the two branch air outlets 612 are symmetrical with respect to the center line of the main air outlet 614. Preferably, the range of the included angle between the positive direction of the center line of the branch air outlet 612 and the positive direction of the center line of the main air duct air outlet 614 is 15 to 60 degrees, so that the air in the two branch air outlet air ducts 12022 and the air in the main air duct 1203 can smoothly enter the detection air duct 1202 together. It should be understood by those skilled in the art that in other preferred embodiments of the present invention, the gas in the two branch outlet air ducts 12022 can also enter the detection air duct 1201 in parallel with the gas in the main air duct 1203.

Referring to fig. 6 of the specification, each of the supporting sidewalls 521 further includes two inclined baffles 5211, the inclined baffles 5211 are positioned at one end of the supporting sidewall 521 near the branch outlet 613, the inclined baffles 5211 extend toward the inner side of the supporting sidewall 521, and the inclined branch outlet 613 is formed at the outer side of the inclined baffles 5211. Further, one end of each of the supporting sidewalls 521 near the branch air outlet 613 is provided with two inclined baffles 5211, and the two inclined baffles 5211 are symmetrical to each other with respect to the main air duct 1203.

Specifically, the second air duct wall 52 further includes a convex folding body 522, the convex folding body 522 is disposed at an end of one of the supporting side walls 521 located inside the main air duct 1203, the end is away from the branch air outlet 613, the convex folding body 522 is convexly folded towards the inside of the main air duct 1203, the convex folding body 522 and the two supporting side walls 521 have the same height, the mounting groove 520 is formed above the convex folding body 522, the convex folding body 522 can also support the first air duct wall 51 disposed in the mounting groove 520, wherein the left side defining the air flowing direction in the main air duct 1203 is the inside of the main air duct 1203, and the right side defining the air flowing direction in the main air duct 1203 is the outside of the main air duct 1203.

The second air duct wall 52 further has a communication cavity 5220 formed in the convex folding body 522, the communication cavity 5220 is communicated with a branch air outlet duct 12022 located inside the main air duct 1203, the communication cavity 5220 is located below the first communication hole 510, and the communication cavity 5220 is communicated with the first communication hole 510. The gas in the branch inlet air duct 12021 can enter the communication chamber 5220 through the first communication hole 510, and then enter the branch outlet air duct 12022 communicated with the communication chamber 5220. It should be understood by those skilled in the art that the convex folding body 522 not only can improve the stability of supporting the first air duct wall 51, but also can facilitate the design of the first side wall 51, and facilitate the communication between the branch inlet air duct 12021 and the branch outlet air duct 12022.

The second air duct wall 52 further has a mounting groove sidewall 523, and a branch outlet air duct 12022 is formed between the mounting groove sidewall 523 and a supporting sidewall 521 located outside the main air duct 1203. And the height of the second air path wall 52 is higher than that of the support sidewall 521, and the mounting groove 520 is formed at the inner side of the mounting groove sidewall 523. Preferably, in this preferred embodiment, the air detection assembly 20 further includes a light generating assembly and a light receiving assembly, the light generating assembly and the light receiving assembly are respectively disposed at two sides of the detection air duct 1202, the light generating assembly is configured to emit light into the detection air duct 1202, and the light receiving assembly is configured to receive light of the gas passing through the detection air duct 1201, so as to detect the content of particulate matters in the gas in the detection air duct 1201. It should be understood by those skilled in the art that in other preferred embodiments of the present invention, the air detection assembly 20 can also be implemented as other types of detection devices, and the specific type of the air detection assembly 20 should not be construed as limiting the present invention as long as the inventive objects of the present invention can be achieved.

Referring to fig. 7, the first air duct wall 51 further has a detection opening 512, and the position of the detection opening 512 is adapted to the position of the air detection assembly 20, so that the light reflected and/or refracted by the particles in the gas can pass through the detection opening 512 and be received by the light receiving assembly, so as to detect the content of the particles in the gas. Preferably, in the preferred embodiment, the size of the detection opening 512 is larger than the area of the light receiving assembly, so that the light receiving assembly can better capture the light reflected and/or refracted by the particles in the gas.

The air quality detection device 100 for the vehicle further includes a set of heating elements 53, where the heating elements 53 are disposed in the detection air channel 1201 and used for heating the temperature of the gas in the detection air channel 1201, so that the particulate matters in the gas in the detection air channel 1201 can be more uniformly distributed in the detection air channel 1201, and the accuracy of the air quality detection result is improved. And the heat generating component 53 is electrically connected to the circuit board assembly 40. Preferably, in the present preferred embodiment, the heat generating component 53 is two heating resistors, two of the heating resistors are electrically connected to the circuit board assembly 40, and the heating resistors are used for heating the temperature of the gas in the detection air duct 1201.

Referring to fig. 3B and 4B of the specification, the circuit board assembly 40 further has a second vent hole 420, and the outlet flow channel 140 is communicated with the outside through the second vent hole 420 and the first receiving cavity 1101. In the preferred embodiment, the inlet flow channel 130 and the outlet flow channel 140 are respectively located on the same side of the housing 10, so that the occupied space when the inlet flow channel 130 and the outlet flow channel 140 are communicated with an external pipeline is reduced, and the installation is convenient.

Specifically, the casing 10 further includes an air inlet pipe 11 and an air outlet pipe 12, the air inlet flow channel 130 is formed in the air inlet pipe 11, the air outlet flow channel 140 is formed in the air outlet pipe 12, the air inlet pipe 11 and the air outlet pipe 12 respectively from the casing 10 extends outward with the same side, and one reduces the installation occupied volume when the vehicle air quality detection device 100 is used, and is convenient for the installation of the vehicle air quality detection device 100.

The housing 10 further includes a second filter assembly 13, the second filter assembly 130 is disposed in the gas flow path of the inlet flow channel 130, and the second filter assembly 13 is used for filtering large-sized objects, such as hairs, in the gas entering the inlet flow channel 130, and preventing the large-sized objects from entering the detection air channel 1201 to affect the accuracy of the detection result. In the preferred embodiment, the second filter assembly 13 is a filter plate having a plurality of through holes, the filter plate being disposed at an outwardly extending end of the inlet duct 11. It should be understood by those skilled in the art that in other preferred embodiments of the present invention, the second filter assembly 130 can also be disposed at an intermediate position of the air inlet duct 11, and those skilled in the art should understand that the specific position of the air inlet duct 11 where the second filter assembly 13 is disposed should not be construed as a limitation of the present invention as long as the object of the present invention can be achieved.

Referring to fig. 3B and fig. 4B of the specification, the air quality detecting device 100 for a vehicle further includes a dust-proof component 31, the dust-proof component 31 is disposed around the air driving component 30, the dust-proof component 31 is used for enabling the air driving component 30 to drive the air to move along a preset path, so as to prevent the air driving component 30 from blowing the air to other positions of the first accommodating cavity 1101, on one hand, the dust-proof component is used for improving the accuracy of the air quality detecting result, on the other hand, the dust-proof component can prevent the particulate matters in the air from accumulating on the circuit board assembly 40, and prevent the influence on the work of the circuit board assembly 40, thereby improving the overall service life of the air quality detecting device 100 for a vehicle.

The air quality detection device 100 for the vehicle further includes an electromagnetic shielding assembly 14, the electromagnetic shielding assembly 14 is disposed on the circuit board assembly 40, the electromagnetic shielding assembly 14 is used for reducing the electromagnetic interference generated when the circuit board assembly 40 operates, and the electromagnetic interference generated by the vehicle 200 when the air quality detection device 100 for the vehicle is mounted on the vehicle 200 is reduced. Preferably, in the present preferred embodiment, the electromagnetic shielding assembly 14 is disposed in the second accommodating cavity 1102. It should be understood by those skilled in the art that shielding materials with different sizes or different types can be selected according to different requirements of different vehicles on electromagnetic interference strength, so as to meet the requirements of different vehicles on different sizes of electromagnetic interference.

The air quality detecting device 100 for the vehicle further includes a connection port 15, the connection port 15 is electrically connected to the circuit board assembly 40, and the connection port 15 is adapted to be electrically connected to an external power source, so that the external power source provides electric energy for the air quality detecting device 100 for the vehicle to operate the air quality detecting device 100 for the vehicle.

Referring to fig. 10 to 14 of the specification, a second preferred embodiment of the air quality detecting device 100 for a vehicle according to the present invention is illustrated, in the preferred embodiment, the air quality detecting device 100 for vehicle further comprises a housing 10A, an air detecting assembly 20A, an air driving assembly 30A and a circuit board assembly 30A, the housing 10A further has a receiving cavity 110A, the air detection assembly 20A, the air driving assembly 30A and the circuit board assembly 30A are respectively disposed in the receiving cavity 110A, the circuit board assembly 40A divides the housing chamber 110A into a first housing chamber 1101A and a second housing chamber 1102A, the air driving unit 20A is disposed in the first accommodating chamber 1101A, and the air detecting unit 20A is disposed in the second accommodating chamber 1102A. The housing 10 further has an air duct 120A, an inlet flow channel 130A communicating with the air duct 120A, and an outlet flow channel 140A communicating with the air duct 120A, wherein the external air is suitable for entering the air duct 120A from the inlet flow channel 130A and leaving from the outlet flow channel 140A, and the air detecting assembly 20A is used for detecting the air quality of the air in the detecting air duct 120A.

The air duct 120A further includes a detection air duct 1201A, a branch air duct 1202A, a main air duct 1203A, a blowing air duct 1204A, and an air outlet duct 1205A, the branch air duct 1202A is respectively communicated with the detection air duct 1201A and the blowing air duct 1204A, the main air duct 1203A is respectively communicated with the detection air duct 1201A and the blowing air duct 1204A, and the branch air duct 1202A is located outside the main air duct 1203A. The blowing duct 1204A is connected to the inlet duct 130A, and the outlet duct 1205A is connected to the detection duct 1201A and the outlet duct 140A.

The vehicle air quality detection apparatus 100 further includes a first air duct wall 51A and a second air duct wall 52A, the circuit board assembly 40A, the first air duct wall 51A, and the second air duct wall 52A are stacked on each other, the first air duct wall 51A is disposed between the circuit board assembly 40A and the second air duct wall 52A, and the detection air duct 1201A, the branch air duct 1202A, and the main air duct 1203A are formed between the first air duct wall 51A and the second air duct wall 52A.

The difference between the present preferred embodiment and the above preferred embodiment is that in the present preferred embodiment, the branch air duct 1202A surrounds the outside of the main air duct 1203A, that is, in the present preferred embodiment, a part of the air in the blast air duct 1204A enters the main air duct 1203A, and another part enters the branch air duct 1202A surrounding the outside of the main air duct 1203A. When the air in the main air duct 1203A and the branch air duct 1202A enters the detection air duct 1201A, the air in the branch air duct 1202A surrounds the outside of the air in the main air duct 1203A, so as to prevent the air in the main air duct 1203A from contacting with the detection area of the detection air duct 1201A and/or the air detection assembly 20A, and particulate matter in the air in the main air duct 1203A is accumulated on the inner wall of the detection air duct 1201A and/or the detection area of the air detection assembly 20A, so as to improve the accuracy of the air quality detection result.

Specifically, in this preferred embodiment, the utility model provides a vehicle air quality detection device 100 further includes a main air duct pipeline 71A and a branch air duct pipeline 72A, branch air duct pipeline 72A surround in main air duct pipeline 71A's the outside, main wind channel 1203A is formed in main air duct pipeline 71A, branch wind channel 1202A is formed in main air duct pipeline 71A with between the branch air duct pipeline 72A. In other preferred embodiments of the present invention, a portion of the branch duct 72A is formed on the first duct wall 51A, and another portion is formed on the second duct wall 52A, and when the first duct wall 51A and the second duct wall 52A are overlapped with each other, the branch duct 1202A is formed between the branch duct 72A. Similarly, a portion of the main duct 1203A is formed on the first duct wall 51A, another portion is formed on the second duct wall 52A, and when the first duct wall 51A and the second duct wall 52A are overlapped with each other, the main duct 1203A is formed between the two portions of the main duct 71A. It should be understood by those skilled in the art that in other preferred embodiments of the present invention, the main air duct 71A and the branch air duct 72A can also be implemented as other embodiments, and the specific embodiments of the main air duct 71A and the branch air duct 72A should not be construed as limitations of the present invention as long as the objects of the present invention can be achieved.

In the preferred embodiment, the vehicle air quality detection apparatus 100 further includes a first filter assembly 54A, the first filter assembly 54A is disposed in the branch air duct 1202A, and the first filter assembly 54A is configured to filter particulate matters in the air in the branch air duct 1202A, so that the air in the branch air duct 1202A is clean air when entering the detection air duct 1201A, and the particulate matters carried in the air are prevented from accumulating on the inner wall of the detection air duct 1201A and/or the detection area of the air detection assembly 20A, thereby improving the accuracy of the air quality detection result.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims (24)

1. An air quality detecting device for a vehicle, characterized by comprising:

a housing having a receiving chamber, an air duct, an air inlet channel communicated with the air duct, and an air outlet channel communicated with the air duct, wherein the air duct further includes a main air duct, a branch air duct, and a detection air duct, the branch air duct is located outside the main air duct, and the main air duct and the branch air duct are respectively communicated with the detection air duct;

the air detection assembly is arranged in the accommodating cavity and used for detecting the air quality of the air in the detection air channel;

the air driving assembly is arranged in the accommodating cavity and is used for driving air to flow in the air channel; and

and the air driving assembly and the air detection assembly are electrically connected to the circuit board assembly respectively.

2. The air quality detecting device for vehicle according to claim 1, wherein the air duct further includes an air blowing duct, the air blowing duct is communicated with the air inlet duct, and the air blowing duct is respectively communicated with the main air duct and the branch air duct, and a part of air in the air blowing duct is adapted to enter the main air duct and another part of air in the air blowing duct is adapted to enter the branch air duct.

3. The air quality detecting apparatus for vehicle according to claim 2, wherein the branch air duct further includes two branch air outlet ducts, the two branch air outlet ducts are respectively located at two sides of the main air duct, and the two branch air outlet ducts are respectively communicated with the detecting air duct.

4. The vehicle air quality detection device according to claim 3, wherein the branch air inlet duct further includes a branch air inlet duct, the branch air inlet duct is respectively communicated with the two branch air outlet ducts, the branch air inlet duct is communicated with the air blowing duct, and the air in the air blowing duct is suitable for entering the two branch air outlet ducts through the branch air inlet duct.

5. The air quality detection device for the vehicle according to claim 4, wherein a size of a branch air duct air inlet of the branch air intake duct is smaller than a size of a main air duct air inlet of the main air duct.

6. The air quality detecting apparatus for vehicle according to claim 5, wherein the housing further includes a first air duct wall and a second air duct wall, the first air duct wall and the second air duct wall are respectively disposed in a stacked relation with the circuit board assembly, the first air duct wall is disposed between the circuit board assembly and the second air duct wall, the branch inlet air duct is formed between the first air duct wall and the circuit board assembly, and the main air duct and the two branch outlet air ducts are formed between the first air duct wall and the second air duct wall.

7. The air quality detecting apparatus for a vehicle according to claim 6, wherein the first air duct wall further has a first communicating hole and a second communicating hole, the first communicating hole communicates one of the branch air outlet duct and the branch air inlet duct, and the second communicating hole communicates the branch air inlet duct and the other of the branch air outlet ducts.

8. The air quality detecting device for the vehicle according to claim 7, wherein the air quality detecting device for the vehicle further comprises a first filter assembly, the first filter assembly is disposed in the branch inlet duct between the circuit board assembly and the first duct wall, the first filter assembly is configured to filter the gas entering the branch inlet duct, and the gas in the branch inlet duct enters the two branch outlet ducts through the first communicating hole and the second communicating hole after being filtered by the first filter assembly.

9. The air quality detecting device for vehicle according to claim 6, wherein the two branch air outlet channels each have a branch air outlet, the branch air outlet is connected to the detection air channel, the main air channel further has a main air outlet, the main air outlet is connected to the detection air channel, an included angle between a positive direction of a center line of the two branch air outlets and a positive direction of a center line of the main air outlet is an acute angle, and the two branch air outlets are symmetrical with respect to the center line of the main air outlet, wherein a direction of the center line of the main air outlet to the detection air channel is a positive direction of the center line of the main air outlet, and a direction of the center line of the branch air outlet to the detection air channel is a positive direction of the center line of the branch air outlet.

10. The air quality detecting device for vehicle according to claim 9, wherein the second air duct wall further includes two branch air duct walls, the main air duct is formed between the two branch air duct walls, the two branch air outlet channels are respectively formed outside the two branch air inlet walls, one end of each branch air duct wall near the opening of the branch air duct is respectively provided with two inclined baffles, and the branch air outlet is formed between the two inclined baffles.

11. The air quality detecting apparatus for vehicle according to claim 10, wherein the second air duct wall further includes a mounting groove side wall and a supporting side wall, and has a mounting groove formed on one side of the mounting groove side wall, the first air duct wall is adapted to be placed in the mounting groove, the mounting groove side wall is higher than the supporting side wall, the mounting groove is located above the supporting side wall, and a branch outlet duct is formed between the mounting groove side wall and the supporting side wall.

12. The air quality detecting device for vehicle according to claim 7, wherein the second air duct wall further includes a convex folding body and a supporting side wall, and has a communicating chamber formed in the convex folding body, the communicating chamber communicates the first communicating hole and the branch outlet air duct located at one side of the inner bend of the main air duct, and the convex folding body is connected to the supporting side wall and protrudes into the main air duct.

13. The air quality detecting device for vehicle according to claim 5, wherein the housing further comprises a first air duct wall, wherein the first air duct wall further has a detecting opening, the detecting opening communicates with the detecting air duct, and the position of the detecting opening is adapted to the position of the air detecting component, so that the air detecting component can detect the air quality of the air in the detecting air duct through the detecting opening.

14. The air quality detection device for the vehicle according to claim 1, wherein the branch air duct surrounds an outer side of the main air duct.

15. The vehicle air quality detection device of claim 14, wherein the vehicle air quality detection device further comprises a first filter assembly disposed in the branch air duct for filtering particulate matter in the air in the branch air duct.

16. The air quality detecting device for vehicle according to claim 15, wherein the air quality detecting device for vehicle further comprises a main air duct and a branch air duct, the branch air duct surrounds an outer side of the main air duct, the main air duct is formed on the main air duct, and the branch air duct is formed on the branch air duct.

17. The air quality detecting apparatus for vehicle according to any one of claims 1 to 16, wherein the air quality detecting apparatus for vehicle further comprises an electromagnetic shielding component, which is disposed on the circuit board component and is used for reducing the electromagnetic interference intensity generated when the circuit board component operates.

18. The air quality detecting apparatus for vehicle according to any one of claims 1 to 16, wherein the air quality detecting apparatus for vehicle further comprises a dust-proof assembly disposed outside the air driving assembly for allowing the air driving assembly to drive the air to move along a predetermined track.

19. The air quality detecting apparatus for vehicles according to any one of claims 1 to 16, wherein the air quality detecting apparatus for vehicles further comprises a second filter member provided in the intake flow passage for filtering objects having a predetermined size and preventing the objects having the predetermined size and objects having larger sizes from entering the intake flow passage.

20. The air quality detecting device for the vehicle according to any one of claims 1 to 16, wherein the air quality detecting device for the vehicle further comprises a set of heating components electrically connected to the circuit board component for heating the gas in the detection air duct to increase the activity of the gas in the detection air duct, so that the distribution of the particles in the gas in the detection air duct is more uniform.

21. The air quality detection apparatus for a vehicle of claim 20, wherein the heating component is a heating resistor.

22. The air quality detection apparatus for a vehicle according to any one of claims 1 to 16, wherein the air driving unit and the air detection unit are provided on both sides of the circuit board unit, respectively.

23. The air quality detection apparatus for a vehicle according to any one of claims 1 to 16, wherein the housing further includes an inlet duct and an outlet duct, the inlet duct being formed in the inlet duct, the outlet duct being formed in the outlet duct, the inlet duct and the outlet duct respectively extending outward from the same side of the housing.

24. The air quality detection apparatus for a vehicle according to any one of claims 1 to 16, wherein the main duct has a bent portion.

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