CN211364200U

CN211364200U - Air quality adjusting system for vehicle

Info

Publication number: CN211364200U
Application number: CN201922113672.4U
Authority: CN
Inventors: 张志勇; 徐晨
Original assignee: Yangzhou Yaxing Motor Coach Co ltd
Current assignee: Yangzhou Yaxing Motor Coach Co ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-08-28
Anticipated expiration: 2029-11-29

Abstract

The utility model belongs to the technical field of the empty gas detection surveys, concretely relates to automobile-used air quality governing system. The system comprises an acquisition unit, a control unit and an execution unit, wherein the acquisition unit is arranged in the vehicle, is connected with the control unit and is used for converting acquired air quality signals into electric signals and transmitting the electric signals to the control unit; the control unit comprises an MCU and an instrument assembly, and the MCU is connected with the acquisition unit; the execution unit comprises a ventilation component, the ventilation component is connected with the MCU and the instrument assembly, the ventilation component is manually controlled through the instrument assembly, and the ventilation component is automatically controlled through the MCU. The air-conditioning system is used for solving the problem that driving experience is influenced due to unreasonable dirty air temperature and humidity caused by no air exchange inside and outside a carriage for a long time. Gather the air quality signal through the collection unit that sets up in the car, turn into the analog signal of gathering for MCU, MCU control subassembly work of taking a breath exchanges the inside and outside air of car, with the interior dirty air discharge carriage of car outside.

Description

Air quality adjusting system for vehicle

Technical Field

The utility model belongs to the technical field of the empty gas detection surveys, concretely relates to automobile-used air quality governing system.

Background

Fresh and fresh air is gradually separated from the travel life of people due to increasingly serious air pollution of the carriage, and harmful substances such as VOC (volatile organic compound) gas, haze, PM (particulate matter) 2.5 and the like threaten the riding environment of passengers; unreasonable humiture in the carriage also influences the driving comfort level of the whole vehicle, and the carriage is usually a relatively sealed space, and the problem that these air quality brought is difficult to discover usually, is in the carriage that the air quality is not high for a long time, influences passenger's health.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in overcoming the not enough of prior art, provides an automobile-used air quality control system for solve the interior outside long-time air not exchanged of carriage, lead to the unreasonable influence of the dirty humiture of air to drive the problem of experience.

The utility model provides an above-mentioned technical problem's technical scheme as follows: an air quality adjusting system for a vehicle comprises a collecting unit, a control unit and an execution unit,

the acquisition unit is arranged in the vehicle, is connected with the control unit and is used for converting the acquired air quality signal into an electric signal and transmitting the electric signal to the control unit;

the control unit comprises an MCU and an instrument assembly which are connected with each other, the MCU is connected with the acquisition unit and is used for controlling the execution unit according to the electric signal transmitted by the acquisition unit;

the execution unit comprises a ventilation assembly, the ventilation assembly is connected with the MCU, and the ventilation assembly is automatically controlled by the MCU.

Compared with the prior art, the scheme has the following beneficial effects:

gather the air quality signal through the collection unit that sets up in the car, turn into the analog signal who gathers for MCU, MCU provides automatic operating mode, and the signal data who gathers when the collection unit surpasss predetermined threshold value, the inside and outside air of MCU control subassembly work exchange car of taking a breath, with the interior foul air of car outside the carriage.

Furthermore, the MCU is in communication connection with the instrument assembly, and the ventilation assembly is manually controlled through the instrument assembly.

According to the above scheme, MCU and instrument assembly communication are connected, can carry out manual input control signal to MCU through the instrument assembly, because the instrument assembly can switch manual module or automatic mode, when switching into automatic mode, MCU automatic control subassembly work or the speed governing of taking a breath, when switching into manual mode, the instrument assembly can manual control close open the subassembly of taking a breath, and realize that many gears adjust the subassembly speed of taking a breath, the instrument assembly also can show air quality situation in real time, provide the basis for the work of manual control subassembly of taking a breath.

Further, the acquisition unit includes with VOC concentration sensor, PM2.5 detection module and temperature and humidity sensor that MCU links to each other.

According to the scheme, the collecting unit can collect VOC concentration data, PM2.5 particulate matter concentration data and temperature and humidity data of air in the carriage, and whether the ventilation assembly works or not and the working speed are controlled according to the collected data numerical value.

Furthermore, the control unit further comprises a power output module connected with the MCU, the power output module is connected with the execution unit, and the power output module comprises a high level output module and a low level output module.

According to the scheme, the MCU provides high and low level values to the subsequent execution units through the power output module, and the high and low level values are used for controlling the actions of the execution units.

Furthermore, the execution unit further comprises an audible and visual alarm, and the audible and visual alarm is connected with the MCU.

According to the scheme, when the air quality exceeds the preset maximum threshold value, the audible and visual alarm can give an alarm through the buzzer and give an alarm through the indicator lamp.

Further, the control unit further comprises a power input module connected with the MCU.

According to the scheme, the power input module converts the external unstable power supply into a 5V stabilized power supply for internal use.

Furthermore, the MCU is also connected with a CAN control transceiver.

According to the scheme, the CAN control transceiver CAN be connected with a CAN bus of external equipment to realize data interaction.

Further, the audible and visual alarm comprises an indicator light and a buzzer.

According to the scheme, the audible and visual alarm sends out alarm signals aiming at the visual sense and the auditory sense to remind a driver.

The utility model has the advantages that:

the detection of VOC and PM2.5 numerical values in a carriage is realized, and when the detected numerical values reach various threshold values preset in an MCU, the automatic opening work of an air fan and the automatic adjustment and discharge of air in the carriage through multiple gears are realized through the MCU, so that the air purification is realized; the ventilation assembly can also be automatically controlled to work according to the numerical value of the temperature and humidity sensor, so that the normal temperature and humidity in the carriage can be ensured, and a good riding environment can be provided; the air exchange component can be manually controlled to work and close through the instrument assembly, and meanwhile, the multi-gear speed control can be realized through the instrument assembly; the CAN bus CAN be connected with external equipment to realize data interaction.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a block diagram of an overall system according to an embodiment of the present invention;

fig. 2 is an interface block diagram of an MCU according to an embodiment of the present invention;

fig. 3 is a schematic circuit diagram of an MCU according to an embodiment of the present invention;

fig. 4 is a schematic circuit diagram of a power input module according to an embodiment of the present invention;

fig. 5 is a schematic circuit diagram of a power output module according to an embodiment of the present invention;

fig. 6 is a circuit diagram of the temperature and humidity module according to an embodiment of the present invention.

Reference numerals:

1. a collection unit; 11. a VOC concentration sensor; 12. a PM2.5 detection module; 13. a temperature and humidity sensor; 2. a control unit; 21. MCU; 22. an instrument assembly; 3. an execution unit; 31 a ventilation assembly; 32. an audible and visual alarm; 321. a buzzer; 322. an indicator light; 4. a power input module; 5. a CAN control transceiver; 6. and a power output module.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience of description and simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Examples

As shown in fig. 1, the utility model provides a vehicle air quality governing system, including acquisition unit 1, the control unit 2 and the execution unit 3, acquisition unit 1 sets up in the car and is connected with the control unit 2, be used for turning into the signal of telecommunication with the air quality signal of gathering and give the control unit 2, the control unit 2 includes interconnect's MCU21 and instrument assembly 22, MCU21 is connected with acquisition unit 1, be used for realizing the control to execution unit 3 according to the signal of telecommunication that acquisition unit 1 transmitted, execution unit 3 includes ventilation assembly 31, ventilation assembly 31 and MCU21 connect, realize automatic control through MCU 21.

The MCU21 and the instrument assembly 22 are also in communication connection through a 485 bus, the instrument assembly 22 can be switched between a manual module and an automatic mode, when the automatic mode is switched, the MCU21 compares signal data acquired by the acquisition unit 1 with a preset threshold value to realize the automatic control of the operation and the closing of the ventilation component 31, and compares the acquired signal data with a multi-gear threshold value set inside to realize the automatic adjustment of the multi-gear speed of the ventilation component 31, automatically control the operation of the ventilation component 31 or speed regulation to exchange air inside and outside a carriage, and discharge dirty air in the carriage; when the manual mode is switched, the instrument assembly 22 can be manually controlled to close and open the ventilation component 31, the speed of the ventilation component 31 can be adjusted in multiple gears, the instrument assembly 22 can also display the air quality condition in real time, and a basis is provided for manually controlling the ventilation component 31 to work; the ventilation assembly 31 is an emergency skylight with the model of DS920B, the instrument assembly 22 is a ZB-299TFT with the specific model of ZB-299TFT, the MCU21 is an ST8 ARM chip, and the ventilation assembly is an STM8S103F3P with the specific model of the MCU 21.

The control unit 2 further comprises a power output module 6 and a power input module 4 which are connected with the MCU21, the power output module 6 is connected with the execution unit 3, the power output module 6 comprises a high-level output module and a low-level output module, the MCU21 controls the subsequent execution unit 3 to act through the power output module 6, the manual control of the instrument assembly 22 is also transmitted to the MCU21 through outputting communication signals, and the MCU21 controls the execution unit 3 to act through the power output module 6; as shown in fig. 4, the power input module 4 is a chip with model number LM2576S-5, the maximum current is 2A, the maximum working voltage is 24V, the input circuit inside the power input module 4 is connected in series with a diode to play a role of protection against reverse connection of power, the power input module 4 is used for converting an external unstable 12V-24V power into a 5V temperature power for use by the whole system, and simultaneously, the 5V power output end is also connected in parallel with a low-power TVS with model number SMAJ5.0A for clamping abnormal output.

In this embodiment, the acquisition unit 1 includes a VOC concentration sensor 11, a PM2.5 detection module 12, and a temperature and humidity sensor 13 connected to the MCU21, wherein the VOC sensor is a semiconductor-type sensor, a waterproof and breathable film is provided outside the breathable opening to reduce the influence of external dust and particulate matter, convert the received VOC gas concentration signal into a current signal, and according to the adsorption-desorption mechanism of the gas sensing mechanism, the conductance under different VOC concentrations becomes a nonlinear function relationship, and the corresponding VOC concentration is obtained by detecting the load voltage of an external load resistor; the built-in laser module of PM2.5 particulate matter sensor realizes the detection to PM2.5 granule according to the scattering principle of light. Detect interior VOC gas concentration of carriage and particulate matter concentration through VOC concentration sensor 11 and PM2.5 detection module 12, realize controlling to take a breath subassembly 31 to the data numerical value of gathering whether work and operating speed size.

The temperature and humidity detection module is installed at the upper passenger door, the lower passenger door, the seat and the carriage, a digital temperature and humidity sensor 13 with the type of DHT11 is adopted, a special digital module acquisition technology and a temperature and humidity sensing technology are applied, the sensor comprises a resistance-type humidity sensing element and an NTC temperature measuring element, the product is ensured to have extremely high reliability and excellent long-term stability, a specific circuit is shown in figure 6, the working temperature range of the detector is ensured, and the working stability of the whole system is realized.

Further, the execution unit 3 further comprises an audible and visual alarm 32, the audible and visual alarm 32 is connected with the MCU21, the audible and visual alarm 32 comprises a buzzer 321 arranged inside the instrument desk and an indicator lamp 322 arranged on an instrument panel at the cab, and when the concentration of the VOC gas or the concentration of the PM2.5 exceeds the standard, the MCU21 controls the indicator lamp 322 to flash and the buzzer 321 to give an alarm.

Further, the MCU21 is further connected with a CAN control transceiver 5, the specific model of the CAN control transceiver 5 is MCP2515, the CAN control transceiver 5 completely supports CAN V2.0B technical specifications, CAN send and receive standard and extended data frames and remote frames, realizes data exchange with the CAN bus connection of the external device, and is more real-time, reliable and efficient in information transmission and sharing, and meanwhile, the MCU21 reserves an interface, supports wireless terminal expansion and data return.

The specific working process comprises the steps that the acquisition unit 1 is installed at the upper door, the lower seat and the inner position of a carriage, the concentration of harmful gas in the air is detected through the semiconductor type VOC concentration sensor 11 and the PM2.5 particulate matter sensor, the temperature and humidity conditions in the carriage are detected through the temperature and humidity sensor 13, the signal is processed through the MCU21, if the acquired data exceed a preset threshold value, the MCU21 outputs high-low voltage level signals to the ventilation assembly 31 in the execution unit 3 through the power output module 6, the ventilation assembly 31 is controlled to open and purify the air environment in the vehicle, and meanwhile the MCU21 controls the indicator lamp 322 and the buzzer 321 in the execution unit 3 to give an alarm; in addition, the instrument assembly 22 can be switched to a manual mode, the instrument assembly 22 sends out a multi-gear control signal to the MCU21, and the MCU21 is used for realizing manual multi-gear control of the instrument assembly 22. The whole system has clear structure and lower cost, can effectively monitor the quality condition of air in the vehicle in real time, and automatically purify the air environment in the vehicle when the concentration of harmful gas in the vehicle exceeds the standard.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a vehicle air quality governing system which characterized in that: comprises an acquisition unit, a control unit and an execution unit,

2. The vehicular air quality conditioning system according to claim 1, characterized in that: the MCU is in communication connection with the instrument assembly, and the ventilation assembly is further manually controlled through the instrument assembly.

3. The vehicular air quality conditioning system according to claim 2, characterized in that: the acquisition unit comprises a VOC concentration sensor, a PM2.5 detection module and a temperature and humidity sensor which are connected with the MCU.

4. The vehicular air quality conditioning system according to claim 3, characterized in that: the control unit further comprises a power output module connected with the MCU, the power output module is connected with the execution unit, and the power output module comprises a high-level output module and a low-level output module.

5. The vehicular air quality conditioning system according to claim 4, characterized in that: the execution unit further comprises an audible and visual alarm, and the audible and visual alarm is connected with the MCU.

6. The vehicular air quality conditioning system according to claim 5, characterized in that: the control unit also comprises a power input module connected with the MCU.

7. The vehicular air quality conditioning system according to claim 6, characterized in that: the MCU is also connected with a CAN control transceiver.

8. The vehicular air quality conditioning system according to claim 7, characterized in that: the audible and visual alarm comprises an indicator light and a buzzer.