Vehicle-mounted environment detection device

Abstract

The utility model provides a vehicle-mounted environment detection device, which relates to the field of environment detection, and comprises a shell with an accommodating space; the accommodating space is divided into a first space and a second space which are not communicated with each other by a separator, the wall surface of the first space is provided with a first through hole communicated with the outside of the shell, the wall surface of the second space is provided with a second through hole and a third through hole which are communicated with the outside of the shell, and the second space is provided with a gas flow channel communicated with the second through hole and the third through hole; the circuit board is positioned in the accommodating space and is fixed with the shell; the pollutant concentration detection sensor is fixed in the first space, is electrically connected with the circuit board and is arranged close to the first through hole; the temperature / humidity detection sensor is fixed in the second space, electrically connected with the circuit board and located in the gas flow channel. The pollutant concentration detection sensor and the temperature / humidity detection sensor are located in the same shell and do not interfere with each other in detection, and the pollutant gas concentration and temperature / humidity can be detected at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental detection, in particular to a vehicle-mounted environmental detection device. Background Art

[0002] The concentration of carbon monoxide, nitrogen dioxide and some other pollutants in the car cabin sometimes exceeds the limit set by the World Health Organization. These pollutants may cause dizziness, fatigue, impaired vision and coordination, headaches, etc. Therefore, in order to avoid the above-mentioned effects of pollutants on drivers, vehicles need to monitor the concentration of pollutant gases such as carbon monoxide and nitrogen dioxide to cooperate with the vehicle's air conditioning system to prevent the concentration of pollutants in the cabin from exceeding the limits set by the World Health Organization.

[0003] In addition, the vehicle also needs to detect the temperature and humidity in the cab. Specifically, the temperature inside and outside the cab is checked. The air conditioning system will determine the adjustment method based on the difference between the outside temperature and the temperature inside the cab, so that the cab is kept within a more comfortable or preset temperature range; by detecting the humidity level inside and outside the cab, condensation water is avoided, thereby providing a more comfortable driving experience. For example, Chinese patent documents CN215322394U, CN109895581A, CN111806197A, CN111319422A, etc. disclose adjusting the environment in the cab by setting various pollutant sensors and temperature and humidity sensors.

[0004] The above-mentioned method of setting the pollutant sensor and the temperature and humidity sensor is mostly to set them separately, that is, the pollutant sensor and the temperature and humidity sensor are distributed in different positions of the vehicle. However, this method will cause the vehicle to have to connect various sensors separately through more interfaces. Utility Model Content

[0005] In view of this, an embodiment of the present utility model provides a vehicle-mounted environment detection device, aiming to solve the above-mentioned problem.

[0006] An embodiment of the utility model provides a vehicle-mounted environment detection device, comprising: a shell having a accommodating space; the accommodating space is divided into a first space and a second space that are not connected to each other by a partition, wherein the wall of the first space has a first through hole connected to the outside of the shell, the wall of the second space has a second through hole and a third through hole connected to the outside of the shell, and the second space has a gas flow channel connecting the second through hole and the third through hole; a circuit board is located in the accommodating space and fixed to the shell; a pollutant concentration detection sensor is fixed in the first space and electrically connected to the circuit board, and is arranged close to the first through hole; a temperature / humidity detection sensor is fixed in the second space and electrically connected to the circuit board, and is located in the gas flow channel.

[0007] The beneficial effects brought about by the technical solution provided by the embodiment of the utility model are as follows: in the vehicle-mounted environment detection device of the utility model, the airflow enters the first space through the first through hole, and the pollutant concentration detection sensor measures the gas concentration of at least one of other pollutants such as carbon monoxide and nitrogen dioxide in the airflow; when the airflow enters the second space through the gas flow channel, the temperature / humidity detection sensor measures the temperature / humidity in the airflow; in this process, the first space and the second space do not interfere with each other, and the internal airflows do not circulate with each other, and the detections of the pollutant concentration detection sensor and the temperature / humidity detection sensor do not interfere with each other, so that the concentration and temperature / humidity of the pollutant gas in the air can be detected at the same time, and the two are located in the same detection device, and the vehicle only needs to provide one interface to connect the above two sensors. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of the vehicle-mounted environment detection device of the utility model;

[0009] Figure 2 yes Figure 1 A schematic diagram of the structure of the upper cover in FIG.

[0010] Figure 3 yes Figure 1 A schematic diagram of the structure of the lower cover;

[0011] Figure 4 yes Figure 1 Schematic diagram from top view;

[0012] Figure 5 yes Figure 4 Schematic diagram of the cross section of AA in FIG.

[0013] Figure 6 yes Figure 4 Schematic cross-sectional view of BB in FIG.

[0014] Figure 7 This is a top view of the circuit board.

[0015] In the figure: 1. shell; 110. first space 1; 120. second space; 130. first end face; 140. second end face; 150. third end face; 160. fourth end face; 170. upper shell; 171. receiving groove; 180. lower shell; 181. first channel; 182. second channel; 2. first through hole; 3. second through hole; 4. third through hole; 5. second gas inlet; 51. air inlet; 52. air outlet; 6. circuit board; 61. arc hole; 7. pollutant concentration detection sensor; 8. temperature / humidity detection sensor; 9. first waterproof breathable membrane; 10. second waterproof breathable membrane; 11. baffle; 12. sponge; 121. annular groove; 13. soft glue. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the utility model clearer, the implementation mode of the utility model will be further described below in conjunction with the accompanying drawings.

[0017] Please refer to Figure 1-Figure 7 As shown, an embodiment of the utility model provides a vehicle-mounted environment detection device, including a shell 1, a circuit board 6, a pollutant concentration detection sensor 7 and a temperature / humidity detection sensor 8. The shell 1 has a storage space; the storage space is divided into a first space 110 and a second space 120 that are not connected to each other by a partition, wherein the wall surface of the first space 110 has a first through hole 2 connected to the outside of the shell 1, the wall surface of the second space 120 has a second through hole 3 and a third through hole 4 connected to the outside of the shell 1, and the second space 120 has a gas flow channel connected to the second through hole 3 and the third through hole 4; the circuit board 6 is located in the storage space and fixed to the shell 1; the pollutant concentration detection sensor 7 is fixed in the first space 110 and electrically connected to the circuit board 6, and is arranged close to the first through hole 2; the temperature / humidity detection sensor 8 is fixed in the second space 120 and electrically connected to the circuit board 6, and is located in the gas flow channel.

[0018] The airflow enters the first space 110 through the first through hole 2, and the pollutant concentration detection sensor 7 measures the gas concentration of at least one of other pollutants such as carbon monoxide and nitrogen dioxide in the airflow; when the airflow enters the second space 120 through the gas flow channel, the temperature / humidity detection sensor 8 measures the temperature / humidity in the airflow. During this process, the first space 110 and the second space 120 do not interfere with each other, and the internal airflows do not circulate with each other. The detections of the pollutant concentration detection sensor 7 and the temperature / humidity detection sensor 8 do not interfere with each other, so that the concentration and temperature and humidity of the pollutant gas in the air can be detected at the same time, and the two are located in the same detection device, and the vehicle only needs to provide one interface to connect the above two sensors.

[0019] The above-mentioned partition can be a circuit board 6, or it can be formed by a part of the shell 1. When the partition is formed by a part of the shell 1, the circuit board 6 can be located in one space, and the components in the other space can be connected by wires. Further, when the circuit board 6 is provided with a hole, the partition also includes a receiving groove 171 of the upper shell 170 described below. The present application does not limit the specific form of the above-mentioned partition.

[0020] The temperature / humidity detection sensor 8 may be a temperature detection sensor, a humidity detection sensor, or a temperature and humidity detection sensor (ie, a sensor that can detect both temperature and humidity).

[0021] Preferably, the pollutant concentration detection sensor 7 is a MOX sensor.

[0022] The MOX sensor includes a substrate, a heating electrode and a gas-sensitive unit. Specifically, the heating electrode and the gas-sensitive unit are spaced apart on the substrate, and the substrate is made of a material that is insulating, has good thermal conductivity and a suitable thermal expansion coefficient; the heating electrode is electrically connected to an external power supply, and when the gas sensor is working, the heating electrode can heat the gas sensor so that the gas sensor is maintained at a predetermined operating temperature. In some examples, the material of the heating electrode is platinum metal, and a layer of platinum metal of a certain thickness is sputtered by magnetron sputtering as a heating resistor. The MOX sensor is a prior art, and no further elaboration is given here.

[0023] Based on the above MOX sensor, the concentration of various pollutants can be measured well. At the same time, even if the MOX sensor has a heating electrode, since the first space 110 and the second space 120 are divided by the partition and are not connected to each other, even if the temperature / humidity detection sensor 8 is a temperature detection sensor or a temperature and humidity detection sensor, there is no need to worry too much about the heating electrode of the MOX sensor affecting the temperature / humidity detection sensor 8 when detecting temperature.

[0024] In some embodiments, the housing 1 has a first end face 130 and a second end face 140 that are arranged opposite to each other, the first through hole 2 is located on the first end face 130, and the gas flow channel is arranged adjacent to the second end face 140; the housing 1 has a third end face 150 and a fourth end face 160 that are arranged opposite to each other, and the third end face 150 and the fourth end face 160 are both connected to the second end face 140; the second through hole 3 and the third through hole 4 are respectively arranged on the third end face 150 and the fourth end face 160; the first end face 130, the second end face 140, the third end face 150 and the fourth end face 160 are all parallel to the height direction of the housing 1. Such a layout can make the first through hole 2 and the gas flow channel, and even the pollutant concentration detection sensor 7 and the temperature / humidity detection sensor 8 separated by a long distance in the limited space of the housing 1, and further avoid the above-mentioned two sensor pairs from interfering with each other.

[0025] In some embodiments, the shell 1 includes an upper shell 170 and a lower shell 180; a first through hole 2 is provided on the left side wall of the lower shell 180 (in this case, the left side wall of the lower shell 180 may be the aforementioned first end face 130); a first channel 181 penetrating in the front-to-back direction and a second channel 182 extending in the up-to-down direction are provided on the lower side of the lower shell 180, the lower end of the second channel 182 penetrates the top wall of the first channel 181 and forms a second gas inlet 5, wherein the first channel 181 and the second channel 182 form a gas flow channel, and the two ends of the first channel 181 are respectively connected to the second through hole 3 and the third through hole 4; the circuit board 6 is horizontally fixed in the middle position of the lower shell 180, part of the circuit board 6 is located at the first through hole 2 and is fixed with a pollutant concentration detection sensor 7, and another part of the circuit board 6 is sealed and fixed at the upper end of the second channel 182 and is fixed with a temperature / humidity detection sensor 8; the temperature / humidity detection sensor 8 is also located in the second channel 182.

[0026] After the airflow enters through the first through hole 2 on the left side wall of the shell 1, it reaches the pollutant concentration detection sensor 7 to measure the gas concentration of at least one of the other pollutants such as carbon monoxide and nitrogen dioxide in the air; when the airflow enters the second channel 182 through the first channel 181, it reaches the temperature / humidity detection sensor 8 to measure the temperature / humidity in the air. During this process, the pollutant concentration detection sensor 7 and the temperature / humidity detection sensor 8 do not interfere with each other and are located in the same shell 1. The temperature / humidity detection sensor 8 is installed below the circuit board 6 and is isolated from other components by the second channel 182, so as not to be affected by other components, thereby ensuring the accuracy of the measurement structure.

[0027] Furthermore, the pollutant concentration detection sensor 7 is fixed above the circuit board 6 ; the circuit board 6 divides the first space 110 and the second space 120 ; a resistor and a processor are also fixed above the circuit board 6 .

[0028] At this time, the first space 110 and the second space 120 can be divided by the circuit board 6. Further, at least one of the pollutant concentration detection sensor 7, the resistor, and the processor is arranged above the circuit board 6, the resistor and the processor are heating elements, and the temperature / humidity detection sensor 8 is arranged below the circuit board 6, which can further reduce the influence of the heating element on the temperature / humidity detection sensor 8 to a certain extent.

[0029] Furthermore, it also includes a first waterproof breathable membrane 9 and a second waterproof breathable membrane 10 . The first waterproof breathable membrane 9 is fixed at the first through hole 2 , and the second waterproof breathable membrane 10 is fixed at the lower end of the second channel 182 .

[0030] The first waterproof breathable membrane 9 and the second waterproof breathable membrane 10 are respectively provided at the first through hole 2 and the lower end of the second channel 182 , which helps to protect the circuit board 6 and other electronic components in the housing 1 .

[0031] Furthermore, a baffle 11 is further provided in the first channel 181 , the upper end of the baffle 11 is fixed to the lower side of the second waterproof breathable membrane 10 , and the lower end of the baffle 11 is fixed to the lower side wall of the first channel 181 .

[0032] By setting the baffle 11, after the airflow enters the first channel 181 through the second through hole 3, it cannot pass directly when reaching the baffle 11, and must first enter the second channel 182 to reach the temperature / humidity detection sensor 8 for temperature and humidity detection, and then the second channel 182 is sealed with the circuit board 6 above, so that the airflow can only stay in the second channel 182 and go out through the third through hole 4 on the other side of the baffle 11, allowing the airflow to circulate more efficiently, and physically making the identification of the temperature / humidity detection sensor 8 more direct.

[0033] Here, the baffle 11 is fixed below the second waterproof breathable membrane 10, which is equivalent to dividing the second gas inlet 5 into an air inlet 51 and an air outlet 52. The air inlet 51 is connected to the second through hole 3 through the first channel 181 on one side of the baffle 11, and the air outlet 52 is connected to the third through hole 4 through the other side of the baffle 11. The airflow passes through the second through hole 3 through the first channel 181 on one side of the baffle 11, enters the air inlet 51, reaches the second channel 182, and then flows out from the air outlet 52 through the first channel 181 on the other side of the baffle 11 and out of the third through hole 4.

[0034] Furthermore, an arc-shaped hole 61 is provided on the circuit board 6 , and the arc-shaped hole 61 is located outside the temperature / humidity detection sensor 8 ; the arc-shaped hole 61 is a 1 / 2-3 / 4 circle.

[0035] By setting an arc hole 61 on the outer circuit board 6 of the temperature / humidity detection sensor 8, heat can be prevented from being conducted from other areas of the circuit board 6 to the position of the temperature / humidity detection sensor 8, so that the temperature / humidity detection sensor 8 can detect temperature with higher accuracy.

[0036] The arc hole 61 is 1 / 2 to 3 / 4 of the size of a circular hole. Further, the opening position of the arc hole 61 is arranged close to at least one of the resistor, the processor, and the pollutant concentration detection sensor 7. By setting the arc hole 61 of 1 / 2 of the circular hole or the arc hole 61 of 3 / 4 of the circular hole, on the one hand, it is convenient to connect the circuit board 6 in the arc hole 61 with other parts of the circuit board 6 for fixing the temperature / humidity detection sensor 8, and on the other hand, it can isolate the heat transfer from other areas to the circuit board 6 in the arc hole 61.

[0037] Furthermore, a receiving groove 171 is provided in the upper shell 170 . The receiving groove 171 is located directly above the second channel 182 / arc-shaped hole 61 , and the lower side wall of the receiving groove 171 is sealed to the circuit board 6 .

[0038] By sealing the lower side wall of the receiving groove 171 with the circuit board 6, the airflow in the second channel 182 can be further prevented from passing through the arc hole 61 of the circuit board 6 into the first space 110 and affecting other components, so that the airflow infiltrating from the second channel 182 is isolated in the receiving groove 171.

[0039] Furthermore, the receiving groove 171 is filled with sponge 12 .

[0040] By filling the sponge 12 in the upper space of the circuit board 6 , the airflow entering from the second gas inlet 5 cannot escape to the upper part, but can only stay in the second channel 182 and then go out from the first channel 181 .

[0041] Furthermore, an annular groove 121 is provided below the sponge 12 , and the position of the annular groove 121 corresponds to the arc-shaped hole 61 .

[0042] By setting an annular groove 121 at the position corresponding to the arc hole 61 at the lower end of the sponge 12, it is also to prevent heat from being transferred from other areas of the circuit board 6 to the position of the temperature / humidity detection sensor 8 through the sponge 12, thereby making the detection accuracy of the temperature / humidity detection sensor 8 higher.

[0043] Specifically, in this embodiment, the groove depth of the annular groove 121 is 0.8-1.2 mm, the groove width of the annular groove 121 is larger than the hole width of the arc-shaped hole 61, and the distance between the side walls of the annular groove 121 and the arc-shaped hole 61 on the same side is 0.2-0.3 mm. The groove width of the annular groove 121 is larger than the hole width of the arc-shaped hole 61, which can better block heat conduction.

[0044] Specifically, soft glue 13 is provided between the lower side wall of the receiving groove 171 and the upper side wall of the second channel 182 and the circuit board 6, and the soft glue 13 and the circuit board 6 are interference fit, so that the lower side wall of the receiving groove 171 and the circuit board 6, and the circuit board 6 and the upper end of the second channel 182 are sealed and connected, so that the airflow cannot escape to other areas. It should be supplemented that the sealing method can also be achieved by direct bonding with glue or other methods. This application does not specifically limit the sealing method.

[0045] In this article, the directional words such as front, back, top, and bottom involved are defined by the positions of the parts in the drawings and the positions of the parts relative to each other, just for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of directional words should not limit the scope of protection requested by this application.

[0046] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle-mounted environment detection device, characterized in that: include: A housing (1) having a receiving space; The accommodating space is divided into a first space (110) and a second space (120) which are not connected to each other by a partition, wherein a wall surface of the first space (110) has a first through hole (2) connected to the outside of the shell (1), a wall surface of the second space (120) has a second through hole (3) and a third through hole (4) connected to the outside of the shell (1), and the second space (120) has a gas flow channel connected to the second through hole (3) and the third through hole (4); A circuit board (6) is located in the accommodating space and is fixed to the housing (1); A pollutant concentration detection sensor (7) is fixed in the first space (110) and electrically connected to the circuit board (6), and is disposed close to the first through hole (2); A temperature / humidity detection sensor (8) is fixed in the second space (120), electrically connected to the circuit board (6), and located in the gas flow channel.

2. The vehicle-mounted environment detection device according to claim 1, characterized in that: The pollutant concentration detection sensor (7) is a MOX sensor, which comprises a substrate, a heating electrode and a gas-sensitive unit; the temperature / humidity detection sensor is a temperature detection sensor or a temperature and humidity detection sensor.

3. The vehicle-mounted environment detection device according to claim 1, characterized in that: The shell (1) has a first end face (130) and a second end face (140) which are arranged opposite to each other, the first through hole (2) is located on the first end face (130), and the gas flow channel is arranged adjacent to the second end face (140); the shell (1) has a third end face (150) and a fourth end face (160) which are arranged opposite to each other, and the third end face (150) and the fourth end face (160) are both connected to the second end face (140); the second through hole (3) and the third through hole (4) are respectively arranged on the third end face (150) and the fourth end face (160); the first end face (130), the second end face (140), the third end face (150) and the fourth end face (160) are all parallel to the height direction of the shell (1).

4. The vehicle-mounted environment detection device according to any one of claims 1 to 3, characterized in that: The shell (1) comprises an upper shell (170) and a lower shell (180); a first through hole (2) is provided on the left side wall of the lower shell (180); a first channel (181) penetrating in the front-to-back direction and a second channel (182) extending in the up-to-down direction are provided on the lower side of the lower shell (180); the lower end of the second channel (182) penetrates the top wall of the first channel (181) and forms a second gas inlet (5), wherein the first channel (181) and the second channel (182) form the gas flow channel, and the two ends of the first channel (181) are respectively connected to the second through hole (3) and the third through hole (4); The circuit board (6) is horizontally fixed at the middle position of the lower shell (180), a portion of the circuit board (6) is located at the first through hole (2) and is fixed with a pollutant concentration detection sensor (7), and another portion of the circuit board (6) is sealed and fixed at the upper end of the second channel (182) and is fixed with a temperature / humidity detection sensor (8); The temperature / humidity detection sensor (8) is located in the second channel (182).

5. The vehicle-mounted environment detection device according to any one of claims 1 to 3, characterized in that: The pollutant concentration detection sensor (7) is fixed above the circuit board (6); the circuit board (6) divides the first space (110) and the second space (120); and at least one of a resistor and a processor is also fixed above the circuit board (6).

6. The vehicle-mounted environment detection device according to claim 4, characterized in that: It also comprises a first waterproof breathable membrane (9) and / or a second waterproof breathable membrane (10), wherein the first waterproof breathable membrane (9) is fixed at the first through hole (2), and the second waterproof breathable membrane (10) is fixed at the lower end of the second channel (182).

7. The vehicle-mounted environment detection device according to claim 6, characterized in that: A baffle (11) is also provided in the first channel (181), the upper end of the baffle (11) is fixed to the bottom of the second waterproof breathable membrane (10), and the lower end of the baffle (11) is fixed to the lower side wall of the first channel (181).

8. The vehicle-mounted environment detection device according to claim 4, characterized in that: The circuit board (6) is provided with an arc-shaped hole (61), the arc-shaped hole (61) is located outside the temperature / humidity detection sensor (8); the arc-shaped hole (61) is 1 / 2-3 / 4 of a circle; the opening position of the arc-shaped hole (61) is arranged close to the pollutant concentration detection sensor (7).

9. The vehicle-mounted environment detection device according to claim 8, characterized in that: A receiving groove (171) is provided in the upper shell (170), and the receiving groove (171) is located directly above the second channel (182) / the arc-shaped hole (61), and the lower side wall of the receiving groove (171) is sealed with the circuit board (6).

10. The vehicle-mounted environment detection device according to claim 9, characterized in that: The accommodating groove (171) is filled with a sponge (12); an annular groove (121) is provided below the sponge (12), and the position of the annular groove (121) corresponds to the position of the arc-shaped hole (61); the groove depth of the annular groove (121) is 0.8-1.2 mm, the groove width of the annular groove (121) is larger than the hole width of the arc-shaped hole (61), and the distance between the side walls of the annular groove (121) and the arc-shaped hole (61) on the same side is 0.2-0.3 mm.

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