WO2020175076A1

WO2020175076A1 - Particle concentration detection device

Info

Publication number: WO2020175076A1
Application number: PCT/JP2020/004609
Authority: WO
Inventors: 俊輔石黒; 熊田　辰己; 俊哉長野; 尚敬石山; 河合　孝昌
Original assignee: 株式会社デンソー
Priority date: 2019-02-27
Filing date: 2020-02-06
Publication date: 2020-09-03
Also published as: JP7259404B2; CN113498386B; CN113498386A; JP2020138615A

Abstract

Provided is a particle concentration detection device for detecting a concentration of a particulate matter contained in air outside a vehicle compartment, comprising: a case member (21) forming an air passage (24) through which the air outside the vehicle compartment flows; a concentration detection unit (51) for detecting the concentration of the particulate matter contained in the air outside the vehicle compartment and flowing through the air passage; and a sensor case (52) accommodating the concentration detection unit. The sensor case has a sensor inlet (521) for introducing the air outside the vehicle compartment from the air passage into the sensor case, and a sensor outlet (522) for allowing air inside the sensor case to flow out of the sensor case and into the air passage. Each of the sensor inlet and the sensor outlet opens toward the air passage formed by the case member.

Description

\¥0 2020/175076 1 卩 (: 17 2020 /004609 Clarification

Title of invention: Particle concentration detector

Cross-reference to related application

[0001] This application is based on Japanese Patent Application No. 2 0 1 9 -3 4 4 2 4 filed on February 27, 2010, the contents of which are incorporated herein by reference. To be

Technical field

[0002] The present disclosure relates to a particle concentration detection device that detects the concentration of particulate matter contained in air.

Background technology

[0003] Conventionally, there is an apparatus described in Patent Document 1. This device is equipped with a casing having an outside circulating air outlet and an inside circulating air outlet, and an air quality sensor for detecting the air quality, and an air quality sensor is arranged at the outside air circulating air outlet of the casing.

Prior art documents

Patent literature

[0004] Patent Document 1: China Utility Model Publication No. 2 0 7 3 2 8 0 4 8

Summary of the invention

[0005] The device shown in Patent Document 1 does not specify a specific air quality detection method, and according to the study by the inventor of the present application, pushing in of air outside the vehicle cabin caused by vehicle running wind If the pressure fluctuates, the detection accuracy of the sensor may fluctuate. An object of the present disclosure is to suppress fluctuations in detection accuracy of a sensor due to fluctuations in pushing pressure of air outside the vehicle.

[0006] According to one aspect of the present disclosure, a particle concentration detection device that detects the concentration of a particulate matter contained in air outside a vehicle is provided with a case member that forms an air passage through which the air outside the vehicle is A concentration detector that detects the concentration of particulate matter contained in the air outside the passenger compartment flowing through the passage; and a sensor case that houses the concentration detector, 〇 2020/175076 2 卩 (：171? 2020 /004609

The sensor case has a sensor inlet for introducing the air outside the vehicle compartment from the air passage into the sensor case, and a sensor outlet for discharging the air inside the sensor case from the inside of the sensor case. The inflow port and the sensor outflow port respectively open toward the air passage of the case member.

[0007] According to the above configuration, since the sensor inlet and the sensor outlet are respectively opened toward the air passage of the case member, the pressure of the air outside the vehicle cabin applied to the sensor inlet and the sensor. The pressure of the air outside the passenger compartment applied to the outlets cancels each other, and fluctuations in the detection accuracy due to fluctuations in the pushing pressure of the air outside the passenger compartment can be suppressed.

[0008] It should be noted that the reference numerals in parentheses attached to the respective components and the like indicate examples of the corresponding relationship between the components and the like and specific components and the like described in the embodiments described later. ..

Brief description of the drawings

[0009] [Fig. 1] Fig. 1 is an external view of a blower unit of a vehicle air conditioner including a particle concentration detection device according to a first embodiment.

[Fig. 2] Fig. 2 is a view schematically showing a schematic configuration of a vehicle air conditioner including the particle concentration detection device according to the first embodiment.

FIG. 3 is an external view of an inside/outside air switching door of a vehicle air conditioner including the particle concentration detecting device according to the first embodiment.

FIG. 4 is a schematic sectional view of the particle concentration detecting device according to the first embodiment.

[Fig. 5] Fig. 5 is a view taken in the direction of arrow V in Fig. 4, showing the state where the sensor case is tilted to the front side.

FIG. 6 is a diagram showing a comparative example of the particle concentration detecting device.

FIG. 7 is a schematic sectional view of a particle concentration detecting device according to a second embodiment.

FIG. 8 is a schematic sectional view of a particle concentration detecting device according to a third embodiment.

[FIG. 9] A schematic cross-sectional view of a particle concentration detecting device according to a fourth embodiment.

FIG. 10 is a schematic sectional view of a particle concentration detecting device according to a fifth embodiment.

FIG. 11 is a schematic sectional view of a particle concentration detecting device according to a sixth embodiment. 〇 2020/175076 3 卩 (：171? 2020 /004609

FIG. 12 is a schematic sectional view of a particle concentration detecting device according to a seventh embodiment.

MODE FOR CARRYING OUT THE INVENTION

[0010] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the following respective embodiments, the same or equivalent portions are denoted by the same reference numerals in the drawings.

[001 1] (first embodiment)

The particle concentration detecting device according to the first embodiment will be described with reference to FIGS. 1 to 6. As shown in Fig. 1, the particle concentration detecting device has a 1//1 sensor 50 and is arranged in the blower unit of the vehicle air conditioner 1 for air conditioning the vehicle. The particle concentration detection device according to the present embodiment is configured such that the concentration of the particulate matter contained in the air outside the passenger compartment introduced into the air conditioning case 21 of the vehicle air conditioner 1 by the operation of the blower 23, that is, the dust concentration. To detect. The air conditioning case 21 corresponds to a case member.

As shown in FIG. 2, the vehicle air conditioner 1 includes an air conditioning unit 2 and an air conditioning control device 40. The air conditioning unit 2 is a vehicle air conditioning unit that is installed in the vehicle compartment to perform air conditioning inside the vehicle compartment. For example, the air conditioning unit 2 is installed in the instrument panel located in the front of the vehicle in the passenger compartment.

[0013] The air conditioning unit 2 includes an air conditioning case 21, an inside/outside air switching door 22, a blower 23, an evaporator 26, a heater core 27, an air mixing door 28, an air filter 30 and a blowout opening door 25. It has 4, 2, 5 5, 2 5, 6 and so on.

[0014] The air conditioning case 21 is made of a resin that has some elasticity and is also excellent in strength. An example of the resin forming the air conditioning case 21 is polypropylene. The air-conditioning case 21 forms the outer shell of the air-conditioning unit 2, and inside the air-conditioning case 21 there is formed an air passage 24 through which the air blown into the vehicle interior circulates. Further, the air conditioning case 21 has an inside air inlet 2 4 1 for introducing inside air into the air passage 24 from a predetermined location in the vehicle interior, and an outside air passage 2 from the outside of the vehicle on the upstream side in the air flow direction of the air passage 24. 4 has an outside air inlet 2 4 2 for introducing outside air. Here, the inside air is the air inside the vehicle interior, and the outside air is the air outside the vehicle interior. 〇 2020/175076 4 卩 (：171? 2020 /004609

[0015] Further, the air conditioning case 21 has a plurality of blowout openings 2 5 1 for blowing air from the air passage 2 4 to the front seat area in the vehicle compartment on the downstream side in the air flow direction of the air passage 24. , 2 5 2, and 2 5 3. Its multiple outlet openings 2 5 1, 2 5 2,

2 5 3 includes a face outlet opening 2 5 1, a foot outlet opening 2 5 2 and a defrost evening outlet opening 2 5 3.

[0016] The face blowing opening 2551 blows air-conditioning wind toward the upper half of the occupant sitting in the front seat. The foot blowout opening 252 blows out the conditioned air toward the feet of the occupant. The defroster blowout opening 253 is for blowing out the conditioned air toward the windshield of the vehicle.

[0017] Inside the air conditioning case 21, there are provided an inside/outside air switching door 22, a blower 23, an evaporator 26, a heater core 27, an air mixing door 28, and the like.

[0018] The inside/outside air switching door 22 continuously adjusts the opening area of the inside air inlet 2 4 1 and the opening area of the outside air inlet 2 4 2. As shown in Fig. 3, the inside/outside air switching door 2 2 has a door part 2 2 1 for opening/closing the inside air inlet 2 4 1 or the outside air inlet 2 4 2, a rotary shaft 2 2 2 and a door part 2 2 1 And a rotary shaft 2 2 2 and a supporting portion 2 2 3 for connecting the rotary shaft 2 2 2 and the rotary shaft 2 2 2. The inside/outside air switching door 22 corresponds to a door member.

The inside/outside air switching door 22 is driven by an actuator such as a servo motor (not shown). The inside/outside air switching door 22 operates so as to open one of the inside air inlet 2 4 1 and the outside air inlet 2 4 2 to close the other inlet. As a result, the inside/outside air switching door 22 can adjust the ratio of the air volume of the inside air introduced into the air passage 24 to the air volume of the outside air.

[0020] As the intake mode to the air passage 24, the inside air mode for introducing the inside air of the vehicle interior is used.

— There is an outside air mode that introduces the outside air of the vehicle and the outside of the vehicle. For example, in the inside air mode in which the inside air is exclusively introduced into the air passage 24, the inside/outside air switching door 22 is positioned at the operating position where the inside air inlet 2 4 1 is opened while the outside air inlet 2 4 2 is closed. On the contrary, in the outside air mode in which the outside air is exclusively introduced into the air passage 24, the inside and outside air 〇 2020/175076 5 卩 (：171? 2020 /004609

The switching door 2 2 is positioned at an operating position where the inside air inlet 2 4 1 is closed and the outside air inlet 2 4 2 is opened.

[0021] The blower 23 is a centrifugal blower that blows air, and has a centrifugal fan 2 3 1 arranged in the air passage 24, and a motor (not shown) that rotationally drives the centrifugal fan 2 3 1. ing. When the centrifugal fan 2 3 1 of the blower 23 is rotationally driven, an air flow is formed in the air passage 24. As a result, the air introduced into the air passage 24 from the inside air inlet 2 4 1 or the outside air inlet 2 4 2 flows through the air passage 24, and the face outlet opening 2 5 1 and foot outlet opening 2 5 1 2 52 and at least one of the defroster blowout openings 2 53 are blown out. In the air passage 24, downstream of the centrifugal fan 231 in the air flow direction, air roughly flows in the direction indicated by the arrow "8".

The face outlet opening door 2 54 is provided in the face outlet opening 2 5 1, and the opening area of the face outlet opening 2 5 1 is adjusted. The foot outlet opening door 2 5 5 is provided at the foot outlet opening 2 52, and the opening area of the foot outlet opening 2 5 2 is adjusted. The defroster blowout opening door 2 5 6 is provided in the defroster blowout opening 2 5 3, and the opening area of the defroster blowout opening 2 5 3 is adjusted.

[0023] The evaporator 26 is a heat exchanger for cooling the air flowing through the air passage 24. The evaporator 26 exchanges heat between the air passing through the evaporator 26 and the refrigerant, thereby cooling the air and evaporating the refrigerant.

The heater core 27 is a heat exchanger for heating the air flowing through the air passage 24. The heater core 27 heat-exchanges the engine cooling water with the air passing through the heater core 27, for example, and heats the air with the heat of the engine cooling water. Further, the heater core 27 is arranged downstream of the evaporator 26 in the air flow direction.

An air-conditioning door 2 8 is provided between the evaporator 26 and the heater core 27 of the air conditioning unit 2. The air mixing door 2 8 passes through the evaporator 26 and bypasses the heater core 27, and the evaporator 2 6 〇 2020/175076 6 卩(：171? 2020/004609

Adjust the ratio with the air volume that passes through the heater core 27 after passing through.

[0026] The air filter 30 is arranged upstream of the blower 23 in the air flow of the air flowing through the air passage 24. The air filter 30 captures dust and the like contained in the air passing through the air filter 30 to some extent. Therefore, the air whose dust and the like have been removed by the air filter 30 is sucked into the blower 23. That is, the air from which dust and the like have been removed by the air filter 30 is blown from the blower 23.

An IV! sensor 50 is provided on the outer peripheral surface of the air conditioning case 21 on the upstream side of the air flow of the air flowing through the air passage 24 from the air filter 30. The IV! sensor 50 is arranged near the outside air inlet 2 4 2.

[0028] Next, the air conditioning controller 40 will be described. The air conditioning controller 40 shown in FIG. 2 is a controller for controlling the air conditioning unit 2. Specifically, the air-conditioning control device 40 is an electronic control device including a storage unit configured by a non-transitional physical storage medium such as a semiconductor memory and a processor. The air conditioning control device 40 executes the computer program stored in its storage unit. By executing this computer program, the method corresponding to the computer program is executed. That is, the air conditioning control device 40 executes various control processes according to the computer program.

Further, the air conditioning control device 40 controls the operation of each actuator by outputting a control signal to each actuator included in the air conditioning unit 2. In short, the air conditioning controller 40 controls various air conditioning in the air conditioning unit 2. For example, the blower 23, the inside/outside air switching door 2 2, the air mix door 28, the face outlet opening door 2 5 4, the foot outlet opening door 2 5 5 and the defroster outlet door 2 5 6 are The drive is controlled by the air conditioning controller 40.

Further, as shown in FIG. 2, the air-conditioning control device 40 includes, for example, an IV!

In addition to sensors such as 0 and actuators such as doors, operating device 4 4 and display device 4 6 are electrically connected. The air-conditioning control device 40 〇 2020/175076 7 卩(：171? 2020/004609

A process for displaying the concentration of the particulate matter contained in the air detected by the IV! sensor 50 on the display device 46 according to the operation on the device 4 4 is also executed.

An inside/outside air switching door 22 is arranged in the air conditioning case 21 on the upstream side of the air flow of the air filter 30 from the air filter 30. A case outlet 2 1 1 and a case inlet 2 1 2 connected to the IV! sensor 50 are formed on the surface of the air conditioning case 21 facing the supporting portion 2 2 3 of the inside/outside air switching door 22. It

[0032] When the door portion 2 21 of the inside/outside air switching door 2 2 opens the inside air inlet 2 4 1 and closes the outside air inlet 2 4 2, the inside/outside air switching door 2 2 shown in FIG. The support portion 2 2 3 is arranged at a position facing the case outlet 2 11 and the case inlet 2 1 2.

[0033] In addition, when the inside air/outside air switching door 2 2 2 2 1 closes the inside air inlet 2 4 1 and the outside air inlet 2 4 2 is open, the inside/outside air switching door 2 2 supports. 2 2 3 is arranged so as to avoid the position facing the case outlet 2 11 and the case inlet 2 1 2.

Next, the particle concentration detection device of this embodiment will be described with reference to FIG. The particle concentration detector is equipped with an air conditioning case 21 that forms an air passage 24 through which air flows and a 1\/1 sensor 50.

[0035] The 1\/1 sensor 50 of the present embodiment is provided with the air conditioning case 2 through the outside air introduction port 2 42.

Detects the concentration of particulate matter contained in the air outside the passenger compartment introduced in 1. The IV! sensor 50 is arranged upstream of the air filter 30 in the air passage 24 through which the air blown into the vehicle compartment flows. Therefore, the 1//1 sensor 50 detects the concentration of dust contained in the air before passing through the air filter 30. In other words, the IV! sensor 50 detects the concentration of dust contained in the air including dust outside the vehicle and raindrops.

The !\/1 sensor 50 is an optical dust sensor configured to detect the dust concentration by the light scattering method. The IV! sensor 50 is composed of a concentration detector 5 1 for detecting the concentration of particulate matter contained in the air outside the passenger compartment flowing through the air passage 24, and a concentration detector 〇 2020/175076 8 卩(：171? 2020/004609

It is equipped with a sensor case 5 2 for housing 5 1 and a blower fan 5 3.

The concentration detection unit 51 has a light emitting unit that emits light and a light receiving unit that receives the light emitted by the light emitting unit, and the light emitted from the light emitting unit hits the particulate matter and is scattered. The scattered light is received by the light receiving unit, and the concentration of dust contained in the air is detected.

[0038] The sensor case 52 is a case for accommodating the concentration detecting portion 51, and is made of resin or the like. Part of the air flowing through the air passage 24 formed in the air conditioning case 21 flows inside the sensor case 52 of the IV! sensor 50.

[0039] The sensor case 5 2 includes a sensor inlet 5 2 1 that introduces air outside the vehicle compartment from the air passage 24 into the sensor case 5 2 and a sensor case from the inside of the sensor case 5 2 to the air passage 2 4 The sensor outlet 52 2 for letting out the air in 52 is provided.

[0040] Fig. 5 is a view taken in the direction of the arrow in Fig. 4, and shows a state in which the sensor case 52 is tilted to the front side. As shown in FIG. 5, the sensor inlet port 5 21 and the sensor outlet port 52 2 are arranged at vertically displaced positions and at horizontally displaced positions.

The blower fan 53 is for generating an air flow inside the sensor case 52. The blower fan 5 3 introduces the air outside the cabin flowing through the air passage 2 4 from the sensor inlet 5 21 to the inside of the sensor case 5 2 and at the same time the sensor case 5 2 from the sensor outlet 5 2 2 to the air passage 2 4. Exhaust the air inside 2.

[0042] The air-conditioning case 21 allows the air outside the passenger compartment flowing through the air passage 24 to flow into the sensor inlet 5

It has a case outlet 2 11 that leads to 2 1 and a case inlet 2 1 2 that leads the air flowing out from the sensor outlet 5 2 2 to the air passage 2 4.

[0043] The case outlet 2 1 1 and the case inlet 2 1 2 are respectively the air conditioning case 2

It opens toward the air passage of 1. Further, the case outlet 2 11 is arranged on the downstream side of the case inlet 2 1 2 in the main flow direction, which is the air flow direction of the air outside the passenger compartment flowing through the air passage 24. 〇 2020/175076 9 卩(：171? 2020/004609

[0044] Further, the air conditioning case 21 connects the space including the case outlet 2 11 and the case inlet 2 1 2 and the space including the sensor inlet 5 21 and the sensor outlet 5 2 2. The sensor flow path 2 1 3 is provided.

[0045] In addition, the sensor flow passage 2 13 has an internal space of the sensor flow passage 2 13 as a space from the case outlet 2 11 to the sensor inlet 5 2 1 A partition plate 2 1 4 is provided to partition the space from the outlet 5 2 2 to the case inlet 2 1 2.

[0046] Further, the sensor case 5 2 projects toward the sensor flow path 2 13 3 side and guides the air outside the vehicle compartment from the sensor outlet 5 2 2 to the inside of the sensor case 5 2 by the first projecting portion 5 2. 3 1 and Further, it has a second protruding portion 5 3 2 which protrudes to the sensor flow path 2 13 3 side and guides the air inside the sensor case 5 2 to the sensor outlet 5 2 2. The sensor outlet 52 2 is formed on the lower surface of the first protruding portion 5 3 1 in the vertical direction, and the sensor inlet 5 2 1 is formed on the lower surface of the second protruding portion 5 3 2 in the vertical direction. Is formed in.

Here, as shown in FIG. 6, consider a configuration in which a rectangular parallelepiped sensor case 52 is arranged on the outer peripheral surface of an air conditioning case 21 forming an air passage 24. Then, the sensor inlet 5 2 1 is arranged at a portion of the sensor case 5 2 on the side of the air passage 24, and the sensor outlet 5 2 2 is arranged on a surface of the sensor case 5 2 facing the sensor inlet 5 2 1. To do.

With such a configuration, a large difference occurs between the pressure of the air applied to the sensor inlet 5 2 1 and the pressure of the air applied to the sensor outlet 5 22 2. For this reason, in particular, fluctuations in the air pushing pressure outside the vehicle will greatly affect the detection accuracy.

On the other hand, in the particle concentration detecting device of the present embodiment, the air conditioning case 21 has a case outlet 2 11 that guides the air outside the passenger compartment flowing through the air passage 24 to the sensor inlet 5 21. It has a case inlet port 2 1 2 that guides air from the sensor outlet port 5 2 2 to the air passage 2 4. The case outlet 2 11 and the case inlet 2 11 2 are opened toward the air passage 24 of the air conditioning case 21. 〇 2020/175076 10 卩(：171? 2020/004609

[0050] Therefore, the pressure of the air outside the passenger compartment applied to the sensor inlet port 5 2 1 and the pressure of the air outside the passenger compartment applied to the sensor outlet port 52 2 cancel each other out, and the pressure of pushing the air outside the passenger compartment Variations in detection accuracy due to variations are suppressed.

As described above, the particle concentration detecting device according to the present embodiment is a particle concentration detecting device that detects the concentration of particulate matter contained in the air outside the vehicle, and the air outside the vehicle is flowing. It is provided with an air conditioning case 21 that forms a passage 24.

[0052] Further, a concentration detecting section 5 1 for detecting the concentration of the particulate matter contained in the air outside the passenger compartment flowing through the air passage 24, and a sensor case 5 2 accommodating the concentration detecting section 5 1 are provided. There is. In addition, the sensor case 52 has a sensor inlet port 5 2 1 that introduces air outside the vehicle compartment into the sensor case 5 2 from the air passage, and an air inside the sensor case 5 2 that flows out from the inside of the sensor case 5 2. It has a sensor outlet 52 2 that enables it.

[0053] The case outlet 211 and the case inlet 212 are open toward the air passage 24 of the air conditioning case 21, respectively.

According to the above-mentioned configuration, the sensor inlet port 5 2 1 and the sensor outlet port 52 2 are opened toward the air passage 24 of the air conditioning case 21. Therefore, the pressure of the air outside the passenger compartment applied to the sensor inlet 5 2 1 and the pressure of the air outside the passenger compartment applied to the sensor outlet 5 2 2 cancel each other out, and detection is performed by fluctuations in the air pushing pressure outside the passenger compartment. The fluctuation of accuracy can be suppressed.

The sensor case 52 is fixed to the outer peripheral surface of the air conditioning case 21.

Therefore, the sensor case 52 and the air conditioning case 21 can be integrated and mounted on the vehicle.

In addition, the air conditioning case 21 has a case outlet 2 1 1 that guides the air outside the passenger compartment flowing through the air passage 2 4 to the sensor inlet 5 2 1, and the air from the sensor outlet 5 2 2 to the air passage. Case inlets 2 1 2 leading to 2 4 are provided.

Further, the case outlet 2 11 is arranged on the downstream side of the case inlet 2 1 2 in the air flow direction of the air outside the vehicle that flows through the air passage 24. Like this, the case 〇 2020/175076 1 1 卩(：171? 2020/004609

The inflow port 2 1 1 2 can be arranged on the downstream side of the case outflow port 2 1 1 in the air flow direction of the air outside the passenger compartment that flows through the air passage 2 4.

[0057] Further, the air-conditioning case 21 connects the space including the case outlet 2 11 and the case inlet 2 1 2 and the space including the sensor inlet 5 21 and the sensor outlet 5 22. The sensor flow path 2 1 3 is provided. Therefore, it is possible to further reduce the influence of fluctuations in the air flow outside the vehicle cabin that flows through the air conditioning case 21.

[0058] In addition, in the sensor flow path 2 13, the internal space of the sensor flow path 2 13 is defined as a space from the case outlet 2 11 to the sensor inlet 5 21 A partition plate 2 1 4 is formed to partition the space from the outlet 5 2 2 to the case inlet 2 1 2. Therefore, it is possible to prevent air from circulating between the case outlet 2 11 and the case inlet 2 12.

Further, the case outlet 2 11 is such that the lower end of the case outlet 2 11 is continuously connected to the bottom surface of the sensor channel 2 1 3. Therefore, it is possible to prevent water from accumulating between the lower end of the case outlet 2 11 and the bottom surface of the sensor flow path 2 13 3 and improve drainage performance.

[0060] Further, the sensor case 5 2 projects toward the sensor flow path 2 13 3 and guides the air outside the vehicle compartment from the sensor inlet 5 21 to the inside of the sensor case 5 2 through the first projecting portion 5 2. Has 3 1. Further, it has a second protruding portion 5 3 2 which protrudes to the sensor flow path 2 13 3 side and guides the air from the inside of the sensor case 5 2 to the sensor outlet 5 2 2. Further, the sensor inlet 5 21 is formed on the lower surface of the first protruding portion 5 3 1 in the vertical direction, and the sensor outlet 5 2 2 is formed on the lower surface of the second protruding portion 5 3 2 in the vertical direction. Is formed on.

[0061] Therefore, it is possible to prevent foreign matter from entering the inside of the sensor case 52 from the sensor inlet 5211 and the sensor outlet 5222.

[0062] Further, the sensor inlet port 5 2 1 is arranged vertically above the case outlet port 2 11 1, and the sensor outlet port 5 2 2 is arranged vertically above the case inlet port 2 1 2. ing. Therefore, it is possible to prevent water or the like from entering the sensor case 52. 〇 2020/175076 12 卩(：171? 2020/004609

Further, the particle concentration detecting device of the present embodiment introduces air outside the vehicle compartment from the sensor inlet port 5 2 1 to the inside of the sensor case 5 2 and at the same time from the sensor outlet port 5 2 2 to the sensor case 5 2. It is equipped with a blower fan 5 3 that blows the internal air.

[0064] Therefore, it is possible to introduce a predetermined amount of air outside the vehicle interior into the sensor case while suppressing the influence of fluctuations in the pushing pressure of the air outside the vehicle interior.

(Second Embodiment)

The configuration of the particle concentration detecting device according to the second embodiment will be described with reference to FIG. The particle concentration detecting device of this embodiment has sensor flow channels 2 13. The bottom surface of the sensor channel 2 13 is inclined downward and upward as it approaches the air conditioning case 21.

Therefore, it is possible to discharge the water, which is about to flow into the sensor case from the sensor channel, to the case member side.

[0067] (Third Embodiment)

The configuration of the particle concentration detecting device according to the third embodiment will be described with reference to FIG. The particle concentration detecting device of the present embodiment has a sensor channel 2 13 and an internal space of the sensor channel 2 13 as a space extending from the case outlet 2 11 to the sensor inlet 5 2 1. A partition plate 2 14 is provided to partition the space from the sensor outlet 5 22 to the case inlet 2 1 2.

[0068] The partition plate 2 14 has a space between the case outlet 2 11 1 and the sensor inlet 5 2 1 and the space extending from the sensor outlet 5 2 2 to the case inlet 2 1 2. A communication part 2 1 4 ₃ is formed to communicate with each other. The communication portion 2 1 4 3 of this embodiment is formed of a communication hole.

[0069] The communication part 2 1 4 3 is composed of the air conditioning case 2 1 and the sensor case of the partition plate 2 1 4.

It is formed at a portion closer to the sensor case 52 than the center of 52.

[0070] Therefore, when the sensor case 5 2 is displaced downward in the vertical direction with respect to the air conditioning case 21, the water in the sensor flow path 2 1 3 is drained through the communication part 2 1 4 3. be able to.

[0071] In the present embodiment, among the partition plates 2 1 4, the air conditioning case 2 1 and the sensor case 〇 2020/175076 13 卩(：171? 2020/004609

— The communication part 2 1 4 3 was formed in the part closer to the sensor case 5 2 than the center of the spacer 5 2. On the other hand, the communication part 2 1 4 3 may be formed in a part of the partition plate 2 1 4 that is closer to the air conditioning case 2 1 than the center of the air conditioning case 2 1 and the sensor case 5 2.

As a result, the water that is about to flow into the sensor case 5 2 from the sensor flow path 2 13 can be discharged to the air conditioning case 21 side. Even when different pressures are applied to the case outlet 2 11 and the case inlet 2 1 2 due to uneven flow, air flows through the communication part 2 1 4 ₃ from the higher pressure side to the lower pressure side. Since the pressure is averaged, the influence on the detection accuracy can be reduced.

The communication part 2 1 4 ₃ of this embodiment is composed of a communication hole, but the communication part 2 1 4 3 may be composed of a gap.

[0074] (Fourth Embodiment)

The configuration of the particle concentration detecting device according to the fourth embodiment will be described with reference to FIG. In the particle concentration detecting device of the present embodiment, armor window-shaped louvers _ 2 15 are arranged at the case inlet 2 1 2 and the case outlet 2 1 1. Therefore, it is possible to prevent foreign matter from entering the sensor case 52.

In the present embodiment, armor window-shaped louvers 2 15 are arranged at the case outlet 2 11 and the case inlet 2 11 2. On the other hand, at least one of the case outlet 2 11 1, the case inlet 2 1 2, the sensor inlet 5 21 and the sensor outlet 5 2 2 is provided with an armor window-shaped louver 2 1 5. You may do it.

[0076] (Fifth Embodiment)

The configuration of the particle concentration detecting device according to the fifth embodiment will be described with reference to FIG. In the particle concentration detecting device of the present embodiment, the inside of the sensor channel 2 13 has a labyrinth structure in which the internal space of the sensor channel 2 13 is formed in a labyrinth. Specifically, protrusions 5 2 1 3 and 5 2 2 3 that form the internal space of the sensor flow channel 2 13 3 in a labyrinth are provided inside the sensor flow channel 2 13 3.

As described above, the particle concentration detecting device has a labyrinth structure in which the inside of the sensor flow channel 2 13 forms a labyrinthine internal space of the sensor flow channel 2 13. Therefore, a large foreign object that is not symmetrical to the sensor case 52 〇 2020/175076 14 卩 (：171? 2020 /004609

Can be prevented.

[0078] Further, the air-conditioning case 21 is formed with ribs 2 16 that prevent the air flow of the air outside the vehicle that flows through the air passage 24, and the case outlet 2 11 and the case inlet 2 1 2 is arranged on the upstream side of the air flow of the air outside the vehicle that flows through the air passage 2 4 rather than the rib 2 16.

[0079] Therefore, it is possible to prevent the air outside the vehicle compartment hitting the ribs 2 16 from being pushed into the case outlet 2 11 and the case inlet 2 1 2.

In the present embodiment, the case outlet 2 11 and the case inlet 2 1 2 are arranged on the upstream side of the rib 2 16 in the air flow of the air outside the vehicle that flows through the air passage 24. On the other hand, the case outlet 2 11 and the case inlet 2 1 2 may be arranged on the downstream side of the rib 2 16 in the air flow of the air outside the vehicle that flows through the air passage 24. That is, a step is provided between the case outlet 2 11 and the rib 2 16 and between the case inlet 2 1 2 and the rib 2 16. Since a step difference is provided between the case outlet 2 11 and the rib 2 16 and between the case inlet 2 1 2 and the rib 2 16, the outside of the vehicle that hits the rib 2 16 is exposed. It is possible to prevent air from being pushed into the case outlet 2 11 and the case inlet 2 1 2.

The ribs 2 16 may be, for example, a gap between the door member 2 2 for opening and closing the outside air inlet 2 4 2 for introducing the air outside the vehicle into the air passage 2 4 and the outside air inlet 2 4 2. It may be arranged as a sealing member. It is possible to prevent air from leaking through the gap between the door member 2 2 and the outside air introduction port 2 4 2 by the rib 2 16.

[0081] (Sixth Embodiment)

The configuration of the particle concentration detecting device according to the sixth embodiment will be described with reference to FIG. In the particle concentration detecting device of the present embodiment, the filter 61 is arranged at the case outlet 2 11 and the filter 6 2 is arranged at the case inlet 21 2. Furthermore, a filter 6 3 is arranged at the sensor inlet 5 21 and a filter 6 4 is arranged at the sensor outlet 5 2 2. Therefore, foreign matter inside the sensor case 〇 2020/175076 15 卩(：171? 2020/004609

Can be prevented.

In the present embodiment, the fillers 61 and 62 are arranged in the case outlet 2 11 and the case inlet 2 12; however, at least one of the case outlet 2 11 and the case inlet 2 1 2 is arranged. You may make it arrange|position a filter in.

Further, in the present embodiment, the filters 6 3 and 6 4 are arranged on the sensor inflow port 5 2 1 and the sensor outflow port 5 22 2. However, at least the sensor inflow port 5 21 and the sensor outflow port 5 2 2 are arranged. A filter may be arranged on one side.

[0084] (Seventh Embodiment)

The configuration of the particle concentration detecting device according to the seventh embodiment will be described with reference to FIG. The case inlet 2 1 2 of the particle concentration detecting device of the present embodiment is arranged on the downstream side of the case outlet 2 1 1 in the air flow of the air outside the passenger compartment flowing through the air passage 24. By doing so, the air that has flown into the sensor case 5 2 from the case outlet 2 11 and returned from the case inlet 2 1 2 to the air passage 24 is again detected from the case outlet 2 11 to the sensor case. It is possible to prevent it from flowing into 52.

[0085] (Other Embodiments)

(1) In each of the above embodiments, an example in which the IV! sensor 50 is provided in the air conditioning unit for introducing at least one of the inside air and the outside air into the air conditioning case has been shown. On the other hand, the outside air is used to clear the windows of the windshield located above the vehicle, and the inside/outside air has a two-layer air-conditioning unit that heats the feet of passengers with a 1//1 sensor 50. You can also

(2) In each of the above embodiments, the air conditioning case 2 1 is provided with the sensor flow path 2 13

Although the air conditioning case 2 1 and the sensor case 5 2 were connected via the sensor flow path 2 1 3, the air conditioning case 2 1 and the sensor case 5 2 were directly connected without providing the sensor flow path 2 1 3. You may do so.

[0087] Note that the present disclosure is not limited to the above-described embodiments, and can be modified as appropriate. Further, the above embodiments are not unrelated to each other, and can be appropriately combined unless a combination is obviously impossible. Also, 〇 2020/175076 16 卩 (：171? 2020 /004609

In each of the above-described embodiments, it is needless to say that the elements constituting the embodiment are not necessarily essential, except when it is clearly indicated that they are particularly essential and when they are clearly considered to be essential in principle. .. In addition, in each of the above-described embodiments, numerical values such as the number, numerical value, amount, range, etc. of the constituent elements of the embodiment are referred to, when explicitly stated to be essential, and in principle limited to a specific number. The number is not limited to the specific number, except in the case where Further, in each of the above-described embodiments, when referring to the material, shape, positional relationship, etc. of the constituent elements, etc., there are cases where it is specified explicitly and in principle, the material, shape, positional relationship, etc. are limited. However, it is not limited to its material, shape, positional relationship, etc.

[0088] (Summary)

According to the first aspect shown in part or all of each of the above embodiments, the particle concentration detecting device detects the concentration of the particulate matter contained in the air outside the vehicle, and the air outside the vehicle flows. A case member that forms an air passage is provided. Further, it is provided with a concentration detecting unit for detecting the concentration of the particulate matter contained in the air outside the passenger compartment flowing through the air passage, and a sensor case for accommodating the concentration detecting unit. Further, the sensor case has a sensor inlet for introducing air outside the passenger compartment into the sensor case from the air passage, and a sensor outlet for discharging the air inside the sensor case from the inside of the sensor case. .. The case inlet and the case outlet are each open toward the air passage of the case member.

According to the second aspect, the sensor case is fixed to the outer peripheral surface of the case member. Therefore, the sensor case and the case member can be integrally mounted on the vehicle.

[0090] Further, according to the third aspect, the case member guides air outside the vehicle compartment flowing through the air passage to the sensor inlet, and guides air from the sensor outlet to the air passage. And a case outlet.

The case inlet is located upstream of the case outlet for the air flowing outside the passenger compartment that flows through the air passage. In this way, the case inlet 〇 2020/175076 17 卩(：171? 2020/004609

It can be arranged on the upstream side of the air flow of the air outside the vehicle that flows through the air passage rather than the outlet.

[0091] Further, according to the fourth aspect, the case member has a flow path for a sensor that connects a space including the case outlet and the case inlet and a space including the sensor inlet and the sensor outlet. Equipped with. Therefore, it is possible to further reduce the influence of fluctuations in the air flow outside the vehicle that flows through the case member.

[0092] According to a fifth aspect, in the sensor channel, the bottom surface of the sensor channel is inclined downward in the vertical direction as it approaches the case member.

Therefore, the water that flows into the sensor case from the sensor channel can be discharged to the case member side.

[0094] According to the sixth aspect, in the case inlet, the lower end of the case inlet is continuously connected to the bottom surface of the sensor flow path. Therefore, it is possible to prevent water from accumulating between the lower end of the case inlet port and the bottom surface of the sensor channel, and it is possible to improve water drainage.

[0095] According to a seventh aspect, in the sensor flow path, the internal space of the sensor flow path is defined by the space from the case outlet to the sensor inlet, and the sensor outlet to the case flow. A partition plate is formed to partition the space leading to the outlet. Therefore, it is possible to prevent air from circulating between the case outlet and the case inlet.

[0096] Further, according to the eighth aspect, the partition plate has a communication portion that communicates between the space from the case outlet to the sensor inlet and the space from the sensor outlet to the case inlet. Has been formed.

Therefore, it is possible to discharge the water that flows into the sensor case from the sensor flow path to the case member side. Even when different pressures are applied to the case outlet and the case inlet due to uneven flow, air flows through the communication part from the higher pressure side to the lower pressure side, the pressure is averaged, and the detection accuracy is improved. The effect of can be reduced.

[0098] According to the ninth aspect, the communication portion is formed in a part of the partition plate closer to the sensor case than the center of the air conditioning case and the sensor case. 〇 2020/175076 18 卩(：171? 2020/004609

Therefore, when the sensor case is displaced downward in the vertical direction with respect to the air conditioning case, the water in the sensor flow path can be drained through the communication portion.

[0100] Further, according to the tenth aspect, the sensor case has a first protrusion that protrudes toward the sensor flow path and guides the air in the vehicle compartment from the sensor inlet to the inside of the sensor case. ing. In addition, it has a second protrusion that protrudes toward the sensor flow path and guides the air in the passenger compartment from the inside of the sensor case to the sensor outlet. The sensor inlet is formed on the lower surface of the first protrusion in the vertical direction, and the sensor outlet is formed on the lower surface of the second protrusion in the vertical direction.

[0101] Therefore, it is possible to prevent foreign matter from entering the inside of the sensor case through the sensor inlet and the sensor outlet.

[0102] According to the eleventh aspect, the air conditioning case is formed with ribs that obstruct the air flow of the air outside the vehicle that flows through the air passage of the air conditioning case. The case outlet and the case inlet are arranged on the upstream side or the downstream side of the air flow of the air outside the vehicle that flows through the air passage, rather than the rib.

[0103] Therefore, it is possible to prevent the air outside the vehicle compartment hitting the rib from being pushed into the case outlet and the case inlet.

[0104] Further, according to the 12th aspect, a window louver is arranged in the case outflow port and at least at the _ direction of the case inflow port. Therefore, it is possible to prevent foreign matter from entering the sensor case.

[0105] According to the thirteenth aspect, the inside of the sensor channel has a labyrinth structure that forms the internal space of the sensor channel in a labyrinth.

[0106] Therefore, it is possible to prevent a large foreign matter that is not symmetrical to the detection from entering the sensor case.

[0107] According to the fourteenth aspect, the sensor inlet is arranged on the upper and lower sides of the case outlet, and the sensor outlet is arranged vertically on the upper side of the case inlet. Therefore, it is possible to prevent water and the like from entering the sensor case.

[0108] Further, according to the fifteenth aspect, the case outlet and the case inlet are reduced. 〇 2020/175076 19 卩(：171? 2020/004609

On one side, a filter is placed. Therefore, it is possible to prevent foreign matter from entering the inside of the sensor case.

[0109] Further, according to the sixteenth aspect, a filter is arranged on at least one of the sensor inlet and the sensor outlet. Therefore, it is possible to prevent foreign matter from entering the inside of the sensor case.

[0110] Further, according to the seventeenth aspect, a blower fan for introducing air outside the vehicle compartment from the sensor inlet to the inside of the sensor case and blowing the air inside the sensor case from the sensor outlet is provided. There is.

[0111] Therefore, it is possible to introduce a predetermined amount of air outside the vehicle interior into the sensor case while suppressing the influence of fluctuations in the pushing pressure of air outside the vehicle interior.

Claims

\¥0 2020/175076 20 ((17 2020/004609 Claims

[Claim 1] A particle concentration detection device for detecting the concentration of particulate matter contained in air outside a passenger compartment, comprising:

A case member (2 1) forming an air passage (2 4) through which air outside the vehicle compartment flows,

A concentration detection unit (51) for detecting the concentration of the particulate matter contained in the air outside the vehicle that flows through the air passage,

A sensor case (52) for accommodating the concentration detecting unit; and the sensor case (5 21) for introducing air outside the vehicle compartment from the air passage into the sensor case (5 21). A sensor outlet (5 2 2) for letting out the air inside the sensor case from the inside of the sensor case to the air passage,

The particle concentration detecting device, wherein the sensor inlet and the sensor outlet are each open toward the air passage of the case member.

2. The particle concentration detection device according to claim 1, wherein the sensor case is fixed to an outer peripheral surface of the case member.

3. The particle concentration detecting device according to claim 1 or 2, further comprising: a sensor channel (2 13) that connects a space including the sensor inlet and the sensor outlet.

[Claim 4] The case member includes a case outlet (2 11) for guiding the air outside the vehicle compartment flowing through the air passage to the sensor inlet, and the air outside the vehicle compartment from the sensor outlet. 4. The particle concentration detecting device according to claim 3, further comprising: a case inlet port (2 1 2) leading to the air passage.

5. The particle concentration detecting device according to claim 4, wherein the case inlet is arranged downstream of the case outlet on the air flow downstream side of the air outside the vehicle that flows through the air passage.

6. The particle concentration detector according to claim 3, wherein the sensor channel has a bottom surface that is inclined downward in the vertical direction as the bottom surface of the sensor channel approaches the case member. 〇 2020/175076 21 卩(：171? 2020/004609

Output device.

7. The particle concentration detecting device according to claim 4, wherein the case inlet has a lower end of the case inlet continuously connected to a bottom surface of the sensor channel.

8. The sensor flow path includes an internal space of the sensor flow path, a space extending from the case outlet to the sensor inlet, and a space extending from the sensor outlet to the case inlet. The particle concentration detection device according to claim 4, wherein a partition plate (2 14) for partitioning is formed.

[Claim 9] The partition plate communicates with a space from the case outlet to the sensor inlet and a space from the sensor outlet to the case inlet (2 1 4 The particle concentration detection device according to claim 8, wherein 3) is formed.

[Claim 10] The communication part according to claim 9, wherein the communication part is formed in a part of the partition plate 2 14 closer to the sensor case 52 than the center of the air conditioning case 21 and the sensor case 52. Particle concentration detector.

[Claim 11] The sensor case is

A first protrusion (5 3 1) that protrudes toward the sensor flow path and guides the air in the vehicle compartment from the sensor inlet into the sensor case;

A second protrusion (5 3 2) that protrudes to the sensor flow path side and guides the air in the vehicle compartment from the inside of the sensor case to the sensor outlet,

The sensor inlet port is formed on a vertically lower surface of the first protruding portion, and the sensor outlet port is formed on a vertically lower surface of the second protruding portion. The particle concentration detection device described.

12. The case member is formed with ribs (2 16) that obstruct the air flow of air outside the vehicle that flows through the air passage, between the case outlet and the rib, and the ribs. Case inlet and 〇 2020/175076 22 卩(：171? 2020/004609

The particle concentration detecting device according to claim 4, wherein a step is provided between the protrusions.

[Claim 13] A door member (2 2) for opening and closing an outside air introduction port (2 4 2) for introducing air outside the passenger compartment into the air passage,

13. The particle concentration detecting device according to claim 12, wherein the rib is arranged as a seal member that seals a gap between the door member and the outside air inlet.

14. The armor window-shaped louver (2 15) is arranged in at least one of the case outlet, the case inlet, the sensor inlet, and the sensor outlet. The particle concentration detection device described.

15. The particle concentration detection device according to claim 4, wherein the inside of the sensor channel has a labyrinth structure that forms an internal space of the sensor channel in a labyrinth.

16. The particle according to claim 4, wherein the sensor inlet is arranged vertically above the case outlet, and the sensor outlet is vertically arranged above the case inlet. Concentration detector.

17. The particle concentration detecting device according to claim 4, wherein a filter (61, 62) is arranged on at least one of the case outlet and the case inlet.

[Claim 18] The particle according to any one of claims 1 to 17, wherein a filter (6 3, 6 4) is arranged in at least one of the sensor inlet and the sensor outlet. Concentration detector.

[Claim 19] A blower fan (53) for introducing air outside the vehicle compartment from the sensor inlet into the sensor case and blowing air outside the vehicle compartment from the sensor outlet to the air passage The particle concentration detecting device according to any one of claims 1 to 18,