WO2020129534A1

WO2020129534A1 - Vehicle air-conditioning device

Info

Publication number: WO2020129534A1
Application number: PCT/JP2019/045666
Authority: WO
Inventors: 俊輔石黒; 尚敬石山; 熊田　辰己; 俊哉長野
Original assignee: 株式会社デンソー
Priority date: 2018-12-20
Filing date: 2019-11-21
Publication date: 2020-06-25
Also published as: CN113242807B; JP7234619B2; CN113242807A; JP2020100209A

Abstract

This vehicle air-conditioning device comprises: an air-conditioning case (101, 140, 150) that forms an air passage through which air blown into the passenger compartment flows; a blower (130) that is disposed inside the air-conditioning case and draws the air into the air-conditioning case; and a particle detector (200) that detects the particle concentration of particulate matter contained in the air. The particle detector has: a light-emitting unit (210) that irradiates the air with light; a light-receiving unit (220) that receives scattered light caused by light emitted by the light-emitting unit hitting particulate matter and being scattered; and a sensor case that houses the light-emitting unit and the light-receiving unit. The sensor case is formed with a sensor inlet (231) that introduces some of the air drawn into the air-conditioning case by the operation of the blower into the sensor case.

Description

Vehicle air conditioner

Cross-reference to related application

This application is based on Japanese Patent Application No. 2018-238528 filed on Dec. 20, 2018, and the description content is incorporated herein by reference.

The present disclosure relates to a vehicle air conditioner including a particle detection unit that detects a particle concentration of a particulate matter.

Conventionally, there is a device described in Patent Document 1 as a device for detecting particles in the air. This device includes a housing that forms an air passage, and an air motor that sucks air inside the vehicle compartment or air outside the vehicle compartment into the housing. Then, the concentration of particles is detected by irradiating the air sucked into the housing with light and receiving the scattered light which is scattered by hitting the light.

Chinese Utility Model Application Publication No. 203287312

According to a study by the inventor, the device described in Patent Document 1 cannot accurately detect the concentration of particles contained in distant air because the air volume of the air motor that sucks air into the housing is small. For example, if the housing is arranged inside the instrument panel of the vehicle and the concentration of particles contained in the air near the body of the occupant seated on the seat is detected, it is possible to detect the concentration of particles in the air near the body of the occupant. Since air cannot be sufficiently sucked in, there is a problem that the concentration of particles cannot be detected accurately. Further, when the air volume of the air motor is small, it takes a long time for the air to reach the inside of the housing, which causes a problem that the responsiveness is not good. If the suction capacity of the air motor is increased, it is possible to suck the air near the body of the vehicle occupant into the housing.However, if the suction capacity of the air motor is increased, turbulent flow will occur, which will increase the flow velocity, and The concentration cannot be detected accurately.

The present disclosure aims to enable detection of the concentration of particulate matter contained in distant air with higher accuracy and responsiveness.

According to one aspect of the present disclosure, an air conditioner for a vehicle is arranged inside an air conditioning case that forms an air passage through which air blown into a vehicle compartment flows, and sucks air into the inside of the air conditioning case. An air blower and a particle detection unit that detects the particle concentration of the particulate matter contained in the air are provided.The particle detection unit includes a light emitting unit that irradiates the air with light, and the light emitted by the light emitting unit hits the particulate matter. It has a light receiving part that receives scattered scattered light, and a sensor case that houses the light emitting part and the light receiving part.In the sensor case, a part of the air sucked into the inside of the air conditioning case by the operation of the blower is inside the sensor case. A sensor introduction port for introducing into is formed.

According to such a configuration, the sensor case is formed with the sensor introduction port for introducing a part of the air sucked into the air conditioning case by the operation of the blower into the sensor case. The concentration of the particulate matter contained can be detected more accurately and with high responsiveness.

Note that the reference numerals in parentheses attached to the respective components and the like indicate an example of a correspondence relationship between the components and the like and specific components and the like described in the embodiments described later.

It is the figure which showed typically the vehicle carrying the vehicle air conditioner concerning 1st Embodiment. It is the figure which showed typically the structure of the vehicle air conditioner which concerns on 1st Embodiment. It is an external view of the particle detection part of the vehicle air conditioner which concerns on 1st Embodiment. FIG. 3 is a diagram showing a light emitting unit and a light receiving unit of a particle detecting unit. It is the figure which showed the flow of the air at the time of the operation|movement of the air blower of the vehicle air conditioner which concerns on 1st Embodiment. It is the figure which showed typically the structure of the vehicle air conditioner which concerns on 2nd Embodiment. It is the figure which showed the flow of the air at the time of the operation|movement of the air blower of the vehicle air conditioner which concerns on 2nd Embodiment. It is a flowchart of the vehicle air conditioner which concerns on 2nd Embodiment. It is the figure which showed typically the structure of the vehicle air conditioner which concerns on 3rd Embodiment.

Hereinafter, an embodiment of the present disclosure will be described based on the drawings. In the following respective embodiments, the same or equivalent portions are designated by the same reference numerals in the drawings.

(First embodiment)
The vehicle air conditioner according to the first embodiment will be described with reference to FIGS. 1 to 5. The vehicle air conditioner 10 according to the present embodiment is an air conditioner mounted on the vehicle 1 and is a device for performing air conditioning in the vehicle interior. As shown in FIGS. 1 and 2, the vehicle air conditioner 10 includes an air conditioning unit 100 and a particle detector 200. The vehicle air conditioner 10 is arranged inside the instrument panel 2 of the vehicle 1. The particle detection unit 200 detects the particle concentration of air in the vicinity of the body of an occupant seated on the seat 3 of the vehicle 1. The value of the particle concentration detected by the particle detecting unit 200 is displayed on, for example, a display unit arranged in the meter.

First, the configuration of the air conditioning unit 100 will be described. The air conditioning unit 100 performs air conditioning on the air taken in from the outside and supplies the conditioned air into the vehicle interior. The air conditioning unit 100 includes a blower storage section 101, a blower 130, a connecting section 140, and an air conditioning section 150.

The blower storage part 101 is a part of the vehicle air conditioner 10 that takes in air from the outside. A blower 130, which will be described later, is housed inside the blower housing portion 101. An inner air inlet 111 and an outer air inlet 112 are formed in the blower storage portion 101. The inside air inlet 111 is an opening formed as an inlet for air introduced from the passenger compartment. The outside air inlet 112 is an opening formed as an inlet for air introduced from outside the vehicle. The space outside the vehicle and the outside air inlet 112 are connected by a duct (not shown).

An inside/outside air switching door (not shown) is provided between the inside air inlet 111 and the outside air inlet 112 in the blower storage unit 101. The operation of the inside/outside air switching door adjusts the ratio of the air flowing in from the inside air inlet 111 to the air flowing in from the outside air inlet 112. Since a publicly known one can be adopted as the structure of such an inside/outside air switching door, a concrete illustration and description thereof will be omitted.

A particle filter 120 is arranged at a position on the upstream side (upper side in FIG. 1) of the blower 130 along the air flow direction in the blower housing 101. The particle filter 120 is a filter for removing particles from the air flowing in from the inside air inlet 111 or the outside air inlet 112. As the air passes through the particle filter 120, clean air with a reduced particle concentration is blown into the vehicle interior.

The blower 130 is a blower that blows out air so that it is blown into the vehicle interior. The blower 130 corresponds to a blower that sucks air into the air conditioning case.

When the blower 130 is driven, air is drawn into the blower housing 101 from the inside air inlet 111 and the outside air inlet 112. The air is blown into the vehicle compartment through the connection unit 140 and the air conditioning unit 150 described below.

The connection part 140 is a part provided as a flow path that connects the blower storage part 101 and the air conditioning part 150. In this embodiment, the blower storage portion 101 and the connection portion 140 are integrally formed.

The air conditioner 150 is a part that adjusts the temperature of the air. Inside the air conditioning unit 150, an evaporator for dehumidifying and cooling air, a heater core for heating air, an air mix door for adjusting the amount of air flowing through each of the evaporator and the heater core, and the like are arranged. The blower storage unit 101, the connection unit 140, and the air conditioning unit 150 correspond to an air conditioning case that forms an air passage through which air blown into the vehicle interior flows.

A defroster blowing unit 151, a face blowing unit 152, and a foot blowing unit 153 are provided in the downstream portion of the air conditioning unit 150 along the air flow direction. The defroster blowout part 151 is a part which blows out conditioned air toward the window of the vehicle. The face blowing section 152 is a section that blows out the conditioned air toward the face of the vehicle occupant. The foot blowout part 153 is a part that blows out the conditioned air toward the feet of an occupant of the vehicle.

A door (not shown) is provided in each of the defroster blowing unit 151, the face blowing unit 152, and the foot blowing unit 153, and the flow rate of the air blown out from each blowing unit is adjusted by the opening of the door. Since a known structure can be adopted as the structure of the air conditioning unit 150 as described above, a concrete illustration and description thereof will be omitted.

As shown in FIG. 1, an air introducing chamber 160 is formed at a position in the blower housing 101 near the end of the particle filter 120. The air introducing chamber 160 is formed as a space in which air introduced from the outside of the air conditioning unit 100 into the inside of the air conditioning unit 100 (specifically, inside the blower housing 101) flows. The air flowing through the air introduction chamber 160 bypasses the particle filter 120 and flows.

An opening 161 serving as an air inlet of the air introduction chamber 160 is formed at a position above the particle filter 120 and a particle detection unit 200 described later. The opening 161 communicates the space around the air conditioning unit 100 with the air introduction chamber 160. The opening 162, which serves as an air outlet, in the air introduction chamber 160 is formed at a position slightly below the particle filter 120. The opening 162 connects the air introducing chamber 160 and a space in the blower housing portion 101 below the particle filter 120. The opening 162 corresponds to the air intake for the detection unit. The positions of the

openings

161 and 162 as described above are merely examples. The

openings

161 and 162 may be formed at positions different from the above.

The air conditioning control unit 40 will be described. The air conditioning control unit 40 illustrated in FIG. 1 is a control device that controls the air conditioning unit 100. Specifically, the air conditioning control unit 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 unit 40 executes the computer program stored in the storage unit. By executing this computer program, the method corresponding to the computer program is executed.

Further, the air conditioning control unit 40 controls the operation of each actuator by outputting a control signal to each actuator included in the air conditioning unit 150. In short, the air conditioning control unit 40 performs various air conditioning controls on the air conditioning unit 150. For example, the blower 130, the inside/outside air switching door, the air mix door, the face outlet opening door, the foot outlet opening door, and the defroster outlet opening door (none of which are shown) are drive-controlled by the air conditioning controller 40. It

Further, as shown in FIG. 1, the air conditioning control unit 40 is connected with, for example, sensors such as the particle detection unit 200 and actuators such as doors, as well as an operation unit 41 and a display unit 42.

The operation unit 41 is an operation unit operated by an occupant when adjusting the air volume, temperature, etc. of the conditioned air blown out from the air conditioning unit 150. The operation unit 41 is arranged, for example, on an instrument panel of a vehicle. In the operation unit 41, for example, the air volume of the conditioned air, the target room temperature in the passenger compartment, the outlet of the conditioned air, etc. can be set. Further, in the operation unit 41, it is possible to set an automatic air conditioning mode in which air volume adjustment of air conditioning air, temperature adjustment of air conditioning air, and selection of inside air circulation or introduction of outside air are automatically performed. The operation unit 41 outputs information indicating these settings, that is, operation information indicating an occupant operation performed on the operation device 44, to the air conditioning control unit 40. Further, the air conditioning control unit 40 calculates the concentration of particles in the air in the vehicle compartment based on the output signal of the particle detection unit 200, and the calculated concentration of particles is displayed on, for example, the display unit 42 arranged in the meter. It also performs the process of displaying.

When the blower 130 is driven, the suction force of the blower 130 causes the air in the air introduction chamber 160 to be discharged to the blower 130 side through the opening 162. To compensate for this, outside air flows into the air introduction chamber 160 through the opening 161. For this reason, inside the air introduction chamber 160 in the present embodiment, air flows downward from the position (opening 161) above the first opening 231.

The blower storage section 101 is arranged inside the instrument panel of the vehicle. The space inside the instrument panel, that is, the space outside the air introduction chamber 160, is connected to the vehicle interior. Therefore, the air flowing into the air introduction chamber 160 from the opening 161 is the air in the vehicle compartment.

As shown in FIG. 1, the portion of the air conditioning unit 100 where the air introduction chamber 160 is formed is the portion to which the particle detection unit 200 is attached. The particle detector 200 is attached to the blower housing 101 from the outside so as to form a side portion of the air introduction chamber 160. The position of the upper end of the particle detector 200 is lower than the opening 161.

The particle detection unit 200 is a sensor unit for measuring the concentration of particles in the air. As shown in FIG. 4, the particle detection unit 200 has a light emitting unit 210 having a light emitting element 211 and a light receiving unit 220 having a light receiving element 221.

A part of the light emitted from the light emitting section 210 is scattered by particles in the air introduced into the particle detecting section 200, and a part of the light is detected by the light receiving section 220. The particle detecting unit 200 is configured to detect the presence or absence and the concentration of particles in the air based on the amount of light detected by the light receiving unit 220.

The particle detection unit 200 has a sensor case 230 as shown in FIG. The sensor case 230 is a container that houses the light emitting unit 210, the light receiving unit 220, the sensor blower 240, and the like therein, and is formed in a substantially rectangular parallelepiped shape. A first opening 231 and a second opening 232 are formed on the surface of the sensor case 230 that forms the air introduction chamber 160.

The first opening 231 is an opening formed so that the air from the air introducing chamber 160 flows in. The second opening 232 is an opening formed to discharge the air to the air introduction chamber 160, as described above. The second opening 232 in the present embodiment is formed at a position above the first opening 231.

Further, as shown in FIG. 5, the particle detection unit 200 has a sensor blower 240 that adjusts the flow rate of the air introduced into the sensor case 230. The light emitting unit 210, the light receiving unit 220, and the sensor blower 240 are arranged inside the sensor case 230.

The sensor blower 240 operates according to an instruction from the air conditioning control unit 40 described later. The sensor blower 240 sucks the air flowing through the air introduction chamber 160 into the sensor case 230 through the first opening 231. The maximum suction capacity of the sensor blower 240 is smaller than the maximum suction capacity of the blower 130.

The particle detection unit 200 measures the concentration of particles in the air that has flowed into the sensor case 230 through the first opening 231. The air is the air in the vehicle compartment as described above. The air sucked into the sensor case 230 is discharged into the air introduction chamber 160 through the second opening 232.

By the way, if the suction capacity of the sensor blower 240 is increased, the air around the body of the vehicle occupant can be quickly sucked into the sensor case 230. However, if the suction capacity of the sensor blower 240 is increased, turbulent flow is generated with an increase in flow velocity, and the particle concentration cannot be detected accurately.

Therefore, the vehicle air conditioner 10 of the present embodiment has a sensor introduction port for introducing a part of the air sucked into the blower housing portion 101 into the sensor case 230 by the operation of the blower 130 having a large suction capacity. There is. This sensor inlet corresponds to the first opening 231.

Here, it is assumed that the inside air in the vehicle compartment is introduced from the inside air inlet 111 to the blower storage unit 101 by the operation of the inside/outside air switching door. When the blower 130 starts operating, the inside air is sucked into the blower 130 from the inside air inlet 111 through the particle filter 120 and the blower housing portion 101, as shown in FIG.

At this time, part of the air sucked into the blower storage unit 101 flows into the air introduction chamber 160. Then, a part of the air flowing into the air introducing chamber 160 is introduced into the sensor case 230 through the first opening 231. The particle detection unit 200 measures the concentration of particles in the air that has flowed into the sensor case 230 through the first opening 231.

Therefore, without increasing the suction capacity of the sensor blower 240, it is possible to detect the concentration of particles contained in the air in the distance near the body of the occupant seated on the seat with high accuracy and responsiveness.

The air sucked into the sensor case 230 is discharged from the second opening 232 into the air introduction chamber 160 and sucked into the blower 130.

In the vehicle air conditioner 10 of this embodiment, air is further introduced from the air introduction chamber 160 into the sensor case 230 by the operation of the sensor blower 240. That is, in the vehicle air conditioner 10 of the present embodiment, air is introduced into the sensor case 230 from the air introduction chamber 160 not only by the operation of the blower 130 but also by the operation of the sensor blower 240. Therefore, it is possible to detect the particle concentration with high accuracy and responsiveness without generating turbulence.

By the way, even if the inside air in the vehicle compartment is introduced from the inside air inlet 111 into the inside of the blower storage unit 101 by the operation of the inside/outside air switching door, if the traveling speed of the vehicle is high, the speed of the firewall installed in the vehicle is increased. A large amount of outside air enters the passenger compartment through gaps.

Therefore, the air conditioning control unit 40 of the present embodiment controls the blower 130 so that the flow rate of the air sucked into the blower storage unit 101 increases as the traveling speed of the vehicle increases. As a result, the air near the body of the occupant is easily introduced into the sensor case 230, so that the concentration of particles in the air near the body of the occupant can be accurately detected.

Also, the suction capacity of the blower 130 differs depending on the vehicle class. Therefore, the air conditioning control unit 40 of the present embodiment increases the flow rate of air introduced into the sensor case 230 in a vehicle with a small suction capacity of the blower 130, compared with a vehicle with a large suction capacity of the blower 130. The sensor blower 240 is controlled so that

Further, when the position of the seat 3 of the vehicle 1 is in front of the vehicle, the air flow flowing toward the vehicle air conditioning system 10 is easily blocked by the body of the occupant. For this reason, when the air conditioning control unit 40 of the present embodiment determines that the position of the seat 3 of the vehicle 1 is ahead of the predetermined position of the vehicle based on the signal indicating the position of the seat 3, the air conditioning control unit 40 of the blower storage unit 101 is further operated. The blower 130 is controlled to increase the flow rate of the air sucked into the inside.

Also, the flow of air in the vehicle compartment varies depending on modes such as a face mode in which air is blown from the face blowing section 152 and a foot mode in which air is blown mainly from the foot blowing section 153. Therefore, the air conditioning control unit 40 of the present embodiment controls the sensor blower 240 so that the flow rate of the air introduced into the sensor case 230 becomes an appropriate amount according to the mode.

Also, the flow of air in the vehicle compartment varies depending on whether or not the door that closes the face blowing section 152 closes the face blowing section 152. Therefore, the air conditioning control unit 40 of the present embodiment determines that the flow rate of the air introduced into the sensor case 230 is an appropriate amount according to the signal indicating whether the door closing the face blowing unit 152 closes the face blowing unit 152. The sensor blower 240 is controlled so that

In addition, the air flow path of the air conditioning case is divided into left and right, and the right and left independent temperature control type vehicle air conditioners that independently control the temperature of the air blown from the right air flow path and the left air flow path The air flow rates of the air blown from the air flow path and the left air flow path are different. Therefore, the air conditioning controller 40 of the present embodiment uses the sensor blower so that the flow rate of the air introduced into the sensor case 230 becomes an appropriate amount according to the air volume of the blown air blown out from the right air passage and the left air passage. Control 240.

Also, in a vehicle that performs air conditioning by blowing out conditioned air from the seat air conditioner embedded in the seat toward the body of an occupant seated on the seat, convection is likely to occur in the air in the passenger compartment. Therefore, the air conditioning control unit 40 of the present embodiment compares the case where the seat air conditioning system is not operating with the case where the seat air conditioning system is operating. The sensor blower 240 is controlled so that the flow rate of air introduced into the sensor case 230 is increased.

Also, in a vehicle that performs air conditioning by blowing cool air toward the body of a passenger in the rear seat from the rear air conditioner arranged for the rear seats of the vehicle, convection is likely to occur in the air in the passenger compartment. Therefore, the air conditioning control unit 40 of the present embodiment compares the case where the rear air conditioner is not operating with the case where the seat air conditioner is operating. The sensor blower 240 is controlled so that the flow rate of air introduced into the sensor case 230 is increased.

As described above, the vehicle air conditioner includes the

air conditioning cases

101, 140, and 150 that form the air passages through which the air blown into the vehicle interior flows. The vehicle air conditioner includes a blower 130 that is arranged inside the

air conditioning cases

101, 140, 150 and sucks air into the

air conditioning cases

101, 140, 150.

Further, a particle detector 200 for detecting the particle concentration of the particulate matter contained in the air is provided. Further, the particle detecting unit 200 includes a light emitting unit 210 that irradiates air with light, a light receiving unit 220 that receives scattered light that is scattered by the light emitted by the light emitting unit 210 hitting a particulate matter, and the light emitting unit 210 and the light receiving unit 220. It has a sensor case 230 for housing the.

Then, the sensor case 230 is formed with a first opening 231 as a sensor introduction port for introducing a part of the air sucked into the

air conditioning cases

101, 140 and 150 into the sensor case 230 by the operation of the blower 130. ing.

According to such a configuration, the sensor case 230 has a first sensor introduction port as a sensor introduction port for introducing a part of the air sucked into the

air conditioning cases

101, 140 and 150 by the operation of the blower 130 into the sensor case 230. One opening 231 is formed. Therefore, the concentration of the particulate matter contained in the distant air can be detected more accurately and with good responsiveness.

Further, the particle detection unit 200 has a sensor blower 240 that sucks a part of the air sucked into the

air conditioning cases

101, 140, and 150 into the sensor case 230 through the first opening 231 serving as a sensor inlet. There is.

Therefore, by sucking the sensor blower 240, it is possible to further introduce a part of the air sucked into the

air conditioning cases

101, 140, 150 into the sensor case 230.

Further, the sensor blower 240 is arranged inside the sensor case 230. In this way, the sensor blower 240 disposed inside the sensor case 230 can introduce a part of the air sucked into the

air conditioning cases

101, 140, and 150 into the sensor case 230.

A portion of the

air conditioning case

101, 140, 150 to which the sensor case 230 is attached is a space in which air introduced from the outside of the

air conditioning case

101, 140, 150 into the

air conditioning case

101, 140, 150 flows. An air introducing chamber 160 is formed. Then, the sensor blower 240 sucks a part of the air flowing through the air introducing chamber 160 into the sensor case 230.

In this way, the sensor blower 240 can be provided so as to suck a part of the air flowing through the air introduction chamber 160 into the sensor case 230.

(Second embodiment)
A vehicle air conditioner according to the second embodiment will be described with reference to FIGS. 6 to 8. In the vehicle air conditioner 10 of the first embodiment, the air introduction chamber 160 is formed in the blower storage portion 101 at a position near the end of the particle filter 120, and a part of the air flowing in the air introduction chamber 160 is formed. It is adapted to be introduced into the sensor case 230 of the particle detector 200.

On the other hand, in the vehicle air conditioner 10 of the present embodiment, the air introduction chamber 160 is not formed in the blower storage part 101, and the particle detection part 200 is configured such that a part of the air introduced into the inside air inlet 111 is a particle. It is adapted to be introduced into the sensor case 230 of the detection unit 200.

As shown in FIG. 7, the particle detection unit 200 has a sensor blower 240 that adjusts the flow rate of air introduced into the sensor case 230. The sensor blower 240 is arranged inside the sensor case 230. Although not shown in FIG. 7, the light emitting unit 210 and the light receiving unit 220 are also arranged inside the sensor case 230.

The sensor blower 240 operates according to an instruction from the air conditioning control unit 40 described later. The sensor blower 240 sucks a part of the inside air introduced into the inside air inlet 111 into the sensor case 230 through the first opening 231. The maximum suction capacity of the sensor blower 240 is smaller than the maximum suction capacity of the blower 130.

The particle detection unit 200 measures the concentration of particles in the air that has flowed into the sensor case 230 through the first opening 231. The air is the air in the vehicle compartment as described above. The air sucked into the sensor case 230 is discharged to the outside of the sensor case 230 through the second opening 232.

The air conditioning control unit 40 of the present embodiment performs a process of adjusting the air volume of the sensor blower 240 according to the air volume of the blower 130. A flowchart of this process is shown in FIG. The air conditioning control unit 40 periodically executes the processing shown in FIG.

First, the air conditioning controller 40 determines in S100 whether or not the blown air volume of the blower 130 is equal to or greater than a threshold value. Specifically, the blown air volume of the blower 130 is estimated based on the voltage supplied to the blower 130, and it is determined whether this blown air volume is equal to or more than a threshold value.

Here, when it is determined that the blown air volume of the blower 130 is equal to or greater than the threshold value, the air conditioning control unit 40 reduces the air volume of the sensor blower 240 in S102. As a result, it is possible to prevent excessive air from being introduced into the sensor case 230.

When it is determined that the blown air volume of the blower 130 is less than the threshold value, the air conditioning control unit 40 increases the air volume of the sensor blower 240 in S104. This makes it possible to introduce an appropriate amount of air into the sensor case 230.

In the present embodiment, the same effect as that obtained from the configuration common to the first embodiment can be obtained similarly to the first embodiment.

Also, the air volume determination unit corresponding to step S100 determines whether or not the air volume of the blower is greater than or equal to a threshold value. In addition, the air volume adjusting unit corresponding to steps S102 and S104 reduces the intake air volume of the sensor blower when the air volume determining unit determines that the air volume of the blower is greater than or equal to the threshold value. In addition, when the air volume determination unit determines that the air volume of the blower is less than the threshold value, the air volume adjustment unit increases the intake air volume of the sensor blower.

Thus, if the air flow rate of the blower is determined to be equal to or higher than the threshold value by the air flow rate determination unit, the intake air volume of the sensor blower is reduced, and if the air flow rate of the blower is determined to be less than the threshold value by the air flow rate determination unit, It is possible to increase the intake air volume of the sensor blower.

(Third Embodiment)
A vehicle air conditioner according to the third embodiment will be described with reference to FIG. The vehicle air conditioner 10 according to the present embodiment is configured such that the air intake device for the detection unit takes in air from the outside of the blower storage unit 101 to the inside of the blower storage unit 101 at a position near the end of the particle filter 120 in the blower storage unit 101. An inlet 170 is formed. A part of the air flowing through the air intake 170 for the detection unit is introduced into the sensor case 230 of the particle detection unit 200.

Further, the vehicle air conditioner 10 of the present embodiment includes an opening/closing door 250 that adjusts the opening degree of the detection unit air intake 170. The opening/closing door 250 corresponds to a door member.

The air conditioning control unit 40 adjusts the flow rate of air introduced into the sensor case 230 by the sensor blower 240 and adjusts the flow rate of air introduced from the outside of the blower storage unit 101 into the inside of the blower storage unit 101 by the opening/closing door 25. It is possible to do.

When the door member 250 opens the air intake 170 for the detection unit, the air that does not pass through the particle filter 120 is introduced into the air conditioning unit 150 through the air intake 170 for the detection unit. However, by closing the first opening 231 with the door member 250, it is possible to prevent the air that does not pass through the particle filter 120 from entering the air conditioning unit 150 through the detection unit air intake 170.

Further, in the portion of the

air conditioning case

101, 140, 150 to which the sensor case 230 is attached, an air inlet for a detection unit that takes in air from outside the

air conditioning case

101, 140, 150 into the

air conditioning case

101, 140, 150. 170 is formed. The vehicle air conditioner 10 includes a door member 250 that adjusts the opening degree of the detection unit air intake 170.

As described above, by providing the door member 250 that adjusts the opening degree of the detection unit air intake 170, it is possible to prevent air from being introduced into the blower storage unit 101 through the detection unit air intake 170. You can

(Other embodiments)
(1) In each of the above embodiments, the sensor blower 240 is arranged inside the sensor case 230, but the sensor blower 240 may be arranged outside the sensor case 230. For example, the sensor blower 240 may be arranged in the air introducing chamber 160 so that air is sucked into the air introducing chamber 160 from the outside of the air conditioning case.

(2) The vehicle air conditioner of the third embodiment includes the opening/closing door 250 that adjusts the opening degree of the detection unit air intake 170. However, for example, the vehicle air conditioner of the first embodiment described above is also included. An opening/closing door for adjusting the opening of the opening 162 may be provided.

It should be noted that the present disclosure is not limited to the above-described embodiment, 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. Further, in each of the above-mentioned embodiments, it goes without saying that the elements constituting the embodiment are not necessarily essential unless explicitly stated as being essential and in principle considered to be essential. Yes. Further, in each of the above-described embodiments, when numerical values such as the number of components of the embodiment, numerical values, amounts, ranges, etc. are referred to, it is clearly limited to a particular number and in principle limited to a specific number. The number is not limited to the specific number, except in the case of being performed. Further, in each of the above-described embodiments, when referring to the material, shape, positional relationship, etc. of the constituent elements, etc., unless specifically stated or in principle limited to a specific material, shape, positional relationship, etc. However, the material, shape, positional relationship, etc. are not limited.

(Summary)
According to the first aspect shown in part or all of each of the above-described embodiments, the vehicle air conditioner includes an air conditioning case that forms an air passage through which air blown into the vehicle interior flows, and an interior of the air conditioning case. And a blower that draws air into the inside of the air conditioning case. Further, a particle detection unit for detecting the particle concentration of the particulate matter contained in the air is provided. In addition, the particle detection unit includes a light emitting unit that irradiates air with light, a light receiving unit that receives scattered light when the light emitted by the light emitting unit hits the particulate matter and is scattered, and a sensor case that houses the light emitting unit and the light receiving unit. Have The sensor case is formed with a sensor introduction port for introducing a part of the air sucked into the air conditioning case into the sensor case by the operation of the blower.

According to the second aspect, the particle detection unit has a sensor blower that sucks a part of the air sucked into the air conditioning case into the sensor case through the sensor inlet.

Therefore, by sucking the sensor blower, it is possible to further introduce a part of the air sucked into the air conditioning case into the sensor case.

According to the third aspect, the sensor blower is also arranged inside the sensor case. Thus, the sensor blower arranged inside the sensor case can introduce a part of the air sucked into the air conditioning case into the sensor case.

Further, according to the fourth aspect, an air introduction chamber that is a space in which air introduced from the outside of the air conditioning case into the inside of the air conditioning case flows is formed in a portion of the air conditioning case to which the sensor case is attached. .. Then, the sensor blower sucks a part of the air flowing through the air introduction chamber into the sensor case.

In this way, a sensor blower can be installed so that part of the air flowing through the air introduction chamber is sucked into the sensor case.

Further, according to a fifth aspect, the vehicle air conditioner includes an air volume determination unit that determines whether or not the air volume of the blower is equal to or greater than a threshold value. Further, if the air flow rate of the blower is determined to be equal to or higher than the threshold value by the air flow rate determination unit, the intake air volume of the sensor blower is reduced, and if the air flow rate of the blower is determined to be less than the threshold value by the air flow rate determination unit, the sensor blower It is equipped with an air volume adjustment unit that increases the intake air volume.

Further, according to the sixth aspect, in the portion of the air conditioning case to which the sensor case is attached, an air inlet for the detection unit that takes in air from the outside of the air conditioning case to the inside of the air conditioning case is formed. The vehicle air conditioner includes a door member that adjusts the opening degree of the detection unit air intake.

In this way, by providing the door member that adjusts the opening degree of the air intake for the detection unit, it is possible to prevent air from being introduced into the blower storage unit through the air intake for the detection unit.

The first opening 231 corresponds to the sensor inlet, the detection unit air intake 170 and the opening 162 correspond to the detection unit air intake, the process of S100 corresponds to the air volume determination unit, and S102 and S104. The processing corresponds to the air volume adjusting unit.

Claims

A vehicle air conditioner,
An air-conditioning case (101, 140, 150) forming an air passage through which the air blown into the vehicle interior flows;
A blower (130) disposed inside the air-conditioning case and sucking the air into the air-conditioning case;
A particle detector (200) for detecting the particle concentration of the particulate matter contained in the air,
The particle detector is
A light emitting unit (210) for irradiating the air with light,
A light receiving unit (220) for receiving scattered light that is emitted by the light emitting unit and is scattered by hitting the particulate matter;
A sensor case (230) accommodating the light emitting unit and the light receiving unit,
A vehicle air conditioner in which a sensor introduction port (231) for introducing a part of the air sucked into the inside of the air conditioning case by the operation of the blower into the inside of the sensor case is formed in the sensor case.
The vehicle according to claim 1, wherein the particle detection unit includes a sensor blower (240) that sucks a part of the air sucked into the air conditioning case into the sensor case through the sensor inlet. Air conditioner.
The vehicle air conditioner according to claim 2, wherein the sensor blower is arranged inside the sensor case.
An air introduction chamber (160), which is a space in which the air introduced from the outside of the air conditioning case into the inside of the air conditioning case flows, is formed in a portion of the air conditioning case to which the sensor case is attached.
The vehicle air conditioner according to claim 2 or 3, wherein the sensor blower sucks a part of the air flowing through the air introducing chamber into the sensor case.
An air volume determination unit (S100) that determines whether or not the air volume of the blower is equal to or greater than a threshold value;
When the air flow rate of the blower is determined to be equal to or higher than the threshold value by the air flow rate determination unit, the suction air volume of the sensor blower is reduced, and the air flow rate of the blower is determined to be less than the threshold value by the air flow rate determination unit. The air conditioner for a vehicle according to any one of claims 2 to 4, further comprising: an air volume adjusting unit (S102, S104) that increases an air volume sucked in by the sensor blower.
An air inlet (170, 162) for a detection unit that takes in the air from the outside of the air conditioning case to the inside of the air conditioning case is formed in a portion of the air conditioning case to which the sensor case is attached.
The vehicle air conditioner according to any one of claims 1 to 5, further comprising a door member (250) that adjusts an opening degree of the air intake port for the detection unit.