WO2019003987A1

WO2019003987A1 - Air conditioner

Info

Publication number: WO2019003987A1
Application number: PCT/JP2018/023157
Authority: WO
Inventors: 末松　伸康; 貴幸石川; 松井　賢司
Original assignee: カルソニックカンセイ株式会社
Priority date: 2017-06-30
Filing date: 2018-06-18
Publication date: 2019-01-03
Also published as: CN110650857B; JP6920901B2; JP2019010996A; CN110650857A

Abstract

An air conditioner (100) comprises: an outside air introduction port (11) for introducing air from the outside of a vehicle (1); an inside air introduction port (12) for introducing air from a cabin of the vehicle (1); an intake door (13) that opens and closes the outside air introduction port (11) and the inside air introduction port (12); an inflow passage (14) which is provided downstream of the intake door (13) and into which the air introduced from the outside air introduction port (11) and the inside air introduction port (12) flows; and a particulate concentration sensor (6) for detecting the concentration of particulates in the inflow passage (14). The particulate concentration sensor (6) has an intake flow passage (61) for drawing air into the particulate concentration sensor (6), and a discharge flow passage (62) for discharging air to the outside of the particulate concentration sensor (6). The intake flow passage (61) and the discharge flow passage (62) are open to the inflow passage (14).

Description

Air conditioner

The present invention relates to an air conditioner.

JP 2008-302790 A discloses an air conditioner provided with a dust sensor for detecting dust such as pollen and exhaust gas.

As a dust sensor used for such an apparatus, there is one that drives a fan provided inside, takes in air from the air inlet into the dust sensor, and discharges it from the air outlet to the outside. The dust sensor detects the dust when the air taken in from the air intake passes through the sensor unit, thereby obtaining the dust concentration.

In the air conditioner described in JP2008-302790A, for example, when the blower is driven, the wind speed in the outside air inlet increases and the pressure decreases. As a result, the differential pressure between the inlet side and the outlet side of the dust sensor changes, so the amount of air passing through the sensor unit changes, which may make it impossible to accurately detect the dust concentration.

An object of the present invention is to provide an air conditioner capable of accurately detecting dust.

According to an aspect of the present invention, the air conditioning system includes an outside air inlet for introducing air from the outside of the vehicle, an inside air inlet for introducing air from the vehicle interior, and an intake for opening and closing the outside air inlet and the inside air inlet. A door, an inflow passage provided downstream of the intake door and into which air introduced from the outside air introduction port and the inside air introduction port flows, and a particle concentration detector for detecting the concentration of particles in the inflow passage; The particulate matter concentration detector has an intake passage for sucking air into the particulate matter concentration detector, and an exhaust passage for discharging the air out of the particulate matter concentration detector. The intake passage and the exhaust passage are: Open to the inflow channel.

According to the above aspect, the intake flow path and the exhaust flow path of the particulate matter concentration detector are opened to the inflow path, and therefore, even if the pressure in the inflow path changes, between the intake flow path and the exhaust flow path The differential pressure does not change. Therefore, dust can be detected accurately by the particulate matter concentration detector.

FIG. 1 is a schematic configuration view showing an air conditioner according to an embodiment of the present invention. FIG. 2 is an enlarged view of the main part according to the embodiment of the present invention. FIG. 3 is a cross-sectional view taken along line III-III of FIG. FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 1 in a modification. FIG. 5 is a cross-sectional view corresponding to FIG. 3 in a modification.

Hereinafter, embodiments of the present invention will be described with reference to the attached drawings.

FIG. 1 is a view showing a schematic configuration of an air conditioner 100 mounted on a vehicle 1 according to the present embodiment.

As shown in FIG. 1, the air conditioner 100 includes a housing 10 (case) in which a flow passage 29 is formed, and a blower 17 (blower fan) accommodated in the housing 10. The blower 17 is driven by the motor 20 and sends air into the interior of the vehicle 1 through the inside of the housing 10. The air flow rate of the air blower 17 (discharged air flow rate per unit time) is switched in multiple stages by the control unit 5 (controller).

An outdoor air inlet 11, an internal air inlet 12, and an inflow channel 14 are provided upstream of the blower 17 in the air passage in the housing 10. The outside air introduction port 11 is a flow path for introducing air from the outside of the vehicle 1 as indicated by an arrow A1. The inside air introduction port 12 is a flow path for introducing air from the room 2 as indicated by an arrow A2. The inside air introduction port 12 is formed so that the flow path length is shorter and the flow path resistance is smaller than the outside air introduction port 11.

An intake door 13 is provided at the junction of the outside air introduction port 11 and the inside air introduction port 12 for opening and closing these. The intake door 13 can change its angle (opening degree) by the control unit 5. The intake door 13 is switched between the outside air introduction position and the inside air introduction position shown in FIG. 1, and adjusts the mixing ratio of inside air and outside air according to the angle. The intake door 13 swings about the swing shaft 13a. The swinging shaft 13 a extends on a plane substantially orthogonal to the rotation center axis O with respect to the rotation center axis O of the blower 17.

As shown in FIGS. 1 and 2, the inflow passage 14 is provided with a particulate concentration sensor 6 (dust concentration sensor) as a particulate concentration detector and a filter 16 (electrostatic filter).

As shown in FIG. 2, the particulate matter concentration sensor 6 includes an intake passage 61 for taking in air flowing through the inflow passage 14 into the particulate matter concentration sensor 6 and an exhaust passage 62 for discharging the air out of the particulate matter concentration sensor 6. And a sensor unit 63 provided in the main body to detect passing particles. The particulate matter concentration sensor 6 drives a built-in fan (not shown) to suck air flowing through the inflow passage 14 and detect the concentration of the particulates in the air. The detection signal of the particulate matter concentration sensor 6 is sent to the control unit 5.

The filter 16 is provided on the upstream side of the blower 17 in the inflow passage 14 and removes foreign matter of air sucked into the blower 17 from the inflow passage 14. The filter 16 is placed on a pair of rails (not shown) formed in the housing 10 and is removably accommodated in the housing 10. The filter 16 can be attached and detached through the outlet 10 a formed in the housing 10. The takeout port 10 a is closed by a lid member 40 attached to the housing 10.

As shown in FIG. 1, an outlet channel 15, a defrost outlet 25, a vent outlet 26, and a foot outlet 27 are provided downstream of the blower 17 in the channel 29 in the housing 10. Air is blown toward the window 3 of the room 2 from the defrost outlet 25. Air is blown out from the vent outlet 26 toward a seat (not shown) in the room 2. Air is blown out from the foot outlet 27 toward the floor (not shown) of the room 2.

In the outflow flow path 15, an evaporator 18 (heat exchanger for air cooling), a heater core 19 (heat exchanger for air heating), and an air mix door 21 are provided. The air discharged from the blower 17 as indicated by an arrow A 4 passes through the evaporator 18 and then is temperature-controlled through the heater core 19 via the air mix door 21.

The air mix door 21 has its angle (opening degree) changed by the control unit 5 to adjust the air flow rate passing through the heater core 19.

Doors 22 to 24 are provided at the defrost outlet 25, the vent outlet 26, and the foot outlet 27, respectively. By changing the angles (openings) of the doors 22 to 24 by the control unit 5, the distribution of the flow rate of the air blown into the room 2 is changed.

The intake door 13, the air mix door 21 and the doors 22 to 24 constitute a flow path switching mechanism 30 for switching the flow path 29 (path) through which the air flows. In the air conditioner 100, when the length and curvature of the flow path or the flow rate passing through the heater core 19 changes due to the operation of the flow path switching mechanism 30, the flow path resistance given to the air flow increases or decreases. The flow path resistance is smaller in the inside air circulation state in which the inside air introduction port 12 opens than in the outside air introduction state in which the outside air introduction port 11 opens. The flow path resistance is the most in the internal air circulation state in which the air in the room 2 circulates through the inside air introduction port 12, the inflow path 14, the outflow path 15, and the defrost outlet 25 as shown by arrows A2 to A6. It becomes smaller.

The control unit 5 includes a CPU that controls the operation of each unit, a ROM that stores a map of a control program and the like, and a RAM that temporarily stores detection signals of the particle concentration sensor 6 and various information.

The control unit 5 displays the concentration of the particles detected by the particle concentration sensor 6 on a display device (not shown) provided in the room. In addition, the control unit 5 controls the motor 20 (the amount of air blown by the blower 17), various doors (intake door 13, air mix door 21, and door 22) based on detection signals from the particle concentration sensor 6 and a temperature sensor (not shown). Control the operation of (24).

Next, the lid member 40 will be described.

As shown in FIGS. 2 and 3, the lid member 40 is attached at a position facing the side surface of the filter 16 so as to close the outlet 10 a.

The lid member 40 penetrates the main body 41 and a main body 41 covering the outlet 10 a of the housing 10, a pair of

holding parts

42 and 43 formed on both ends of the main body 41, and intake of the particulate matter concentration sensor 6. The first through hole 44 communicating with the flow path 61, the second through hole 45 penetrating the main body 41 and communicating with the exhaust flow path 62 of the particulate matter concentration sensor 6, and projecting in the direction from the main body 41 toward the filter 16 The rib 46 is formed as described above, and the partition wall 47 provided over the holding portion 42 and the holding portion 43.

The main body portion 41 is formed in a flat plate shape. The particle concentration sensor 6 is attached to the outer surface of the main body 41.

When the lid member 40 is attached to the housing 10, the filter 16 is fitted between the pair of holding

portions

42 and 43. Thereby, the movement of the filter 16 in the direction of the rocking axis 13a is restricted.

The rib 46 is formed to abut the filter 16 when the lid member 40 is attached to the housing 10. Thereby, the movement of the filter 16 in the mounting and demounting direction is restricted. The rib 46 has a function of securing a space (gap G) between the side surface of the filter 16 and the main body 41 of the lid member 40. By securing the gap G, the first through hole 44 and the second through hole 45 can be covered by the side surface of the filter 16, and the flow of air to the particulate matter concentration sensor 6 can be prevented from being impeded.

The first through hole 44 is formed on the upstream side of the second through hole 45. Furthermore, the first through holes 44 and the second through holes 45 are formed so as to sandwich the rib 46. Thus, the intake flow passage 61 and the exhaust flow passage 62 pass through the first through holes 44 and the second through holes 45 formed in the lid member 40 so as to sandwich the rib 46 to the inflow passage 14 (the gap G). Open. Thus, the air discharged from the exhaust flow passage 62 is again taken in from the intake flow passage 61 by opening the intake flow passage 61 and the exhaust flow passage 62 into the inflow flow passage 14 (the gap G) so as to sandwich the rib 46. Can be prevented. Thereby, the measurement accuracy of the particulate matter concentration sensor 6 can be enhanced.

The partition wall portion 47 is provided to connect the holding portion 42 and the holding portion 43, and abuts on the downstream surface (the lower surface in FIG. 2) of the filter 16. As described above, a gap G is present between the main body 41 and the filter 16. The air flowing into the gap G tends to flow downstream of the filter 16 through the gap G (without passing through the filter 16). However, in the present embodiment, since the partition wall portion 47 is provided, the air flowing into the gap G flows from the side surface of the filter 16 to the downstream side through the inside of the filter 16. Thus, foreign matter of air passing through the gap G can also be removed, so foreign matter of air sucked into the blower 17 can be reliably removed. If the gap G is small or air can flow without passing through the filter 16, the partition 47 may not be provided.

In the air conditioner 100, the intake door 13 releases the outside air introduction port 11, and when the blower 17 is driven in a state where the inside air introduction port 12 is closed, the particulate matter concentration sensor 6 When the concentration is detected, the control unit 5 switches to the inside air circulation mode in which the intake door 13 closes the outside air inlet 11 and releases the inside air inlet 12. Instead of such control, for example, the particle concentration detected by the particle concentration sensor 6 may be simply displayed on a display device (not shown) provided in the room. In this case, the passenger confirms the concentration of particulates displayed on the display device, and operates, for example, a switch (not shown) inside to switch to the inside air circulation mode.

According to the air conditioner 100 configured as described above, the following effects can be obtained.

In the air conditioner 100, the intake flow passage 61 and the exhaust flow passage 62 of the particulate matter concentration sensor 6 open to the inflow passage 14. Thereby, for example, even if the air blower 17 operates and the pressure in the inflow passage 14 decreases, the differential pressure between the intake passage 61 and the exhaust passage 62 does not change. Can detect particulates (dust). That is, the measurement accuracy of the particulate matter concentration sensor 6 can be enhanced.

Further, in the air conditioner 100, the particulate matter concentration sensor 6 detects the particulate matter concentration in the inflow passage. As a result, compared with the case where the particulate concentration sensor 6 is provided in each of the outside air inlet 11 and the inside air inlet 12, the number of the particulate concentration sensors 6 can be reduced. Therefore, the cost can be reduced.

Furthermore, in the air conditioner 100, the intake flow passage 61 and the exhaust flow passage 62 are opened to the inflow passage 14 through the lid member 40. In the space (gap G) between the lid member 40 (housing 10) and the side surface of the filter 16, the change in wind speed and pressure is small. Therefore, the pressure in the intake flow passage 61 and the exhaust flow passage 62 is stabilized by opening the intake flow passage 61 and the exhaust flow passage 62 in the space (the gap G). Dust) can be detected, and the measurement accuracy of the particulate matter concentration sensor 6 can be enhanced.

Further, in the above embodiment, the particulate matter concentration sensor 6 is attached to the lid member 40. Since the lid member 40 can be removed from the housing 10, maintenance can be performed with the particulate matter concentration sensor 6 removed from the housing 10. Therefore, the maintainability of the particulate matter concentration sensor 6 is improved.

In the above embodiment, the pair of holding

portions

42 and 43 and the rib 46 provided on the lid member 40 restrict the movement of the filter 16. This can prevent the filter 16 from moving carelessly.

In the above embodiment, the configuration in which the holding portion 42, the holding portion 43, and the rib 46 are provided has been described as an example. However, if the holding portion 42, the holding portion 43, and the rib 46 are unnecessary, they need not necessarily be provided.

In the above embodiment, the particulate matter concentration sensor 6 is attached to the lid member 40, and the intake passage 61 and the exhaust passage 62 of the particulate matter concentration sensor 6 are communicated with the first through holes 44 and the second through holes 45 of the lid member 40. However, instead of this, the intake passage 61 and the exhaust passage 62 may be configured to communicate with the first through hole 44 and the second through hole 45 through a tube, a pipe or the like. In this case, the particulate matter concentration sensor 6 can also be attached to a place other than the lid member 40 and the housing 10.

Next, a modification of the present embodiment will be described with reference to FIG.

In the present modification, the intake flow passage 61 and the exhaust flow passage 62 of the particulate matter concentration sensor 6 are opened in the side surface portion 10 b of the housing 10. Specifically, the housing 10 has a side surface portion 10 b formed in parallel with the swing direction of the intake door 13 (in the direction orthogonal to the swing axis 13 a). The side surface portion 10 b is provided with a support portion 10 c which rotatably supports the swinging shaft 13 a of the intake door 13.

When the air conditioner 100 is operating in the intake mode in which the intake door 13 closes the outside air inlet 11 and the inside air inlet 12 and the inflow passage 14 communicate with each other, the particulate matter concentration sensor 6 is attached to the lid member 40 When attached, the particulate matter concentration sensor 6 is positioned on the flow line of the air from the inside air introduction port 12 and thus is susceptible to pressure fluctuations and wind speed fluctuations. Therefore, as in the present modification, the particulate matter concentration sensor 6 is attached to the side surface portion 10b, and the intake flow passage 61 and the exhaust flow passage 62 are opened in the side surface portion 10b. Can be difficult to receive, and the particle concentration can be detected accurately.

Note that, instead of attaching the particle concentration sensor 6 to the side surface portion 10b, for example, the particle concentration sensor 6 is attached to the lid member 40, and the intake flow passage 61 and the exhaust flow passage 62 are opened in the side surface portion 10b through a tube or pipe. It may be configured to In this case, it is possible to reduce the influence of pressure fluctuation and wind speed fluctuation while improving the maintainability.

Next, another modified example will be described with reference to FIG.

FIG. 5 is a cross-sectional view corresponding to FIG. 3 in this modification. In the modification shown in FIG. 5, the lid member 40 has a bulging portion 48 that bulges outward, and the intake passage 61 and the exhaust passage 62 are configured to open in the space S in the bulging portion 48. Be done. The space S in the bulging portion 48 is formed to communicate with the inflow passage 14 (upstream side of the filter 16).

When a sufficient gap G can not be secured between the lid member 40 and the side surface of the filter 16, the intake flow path 61 and the exhaust flow path 62 can be provided by providing the bulging portion 48 (space S) as in this modification. Can be prevented, and the flow of air to the particulate matter concentration sensor 6 can be secured. Thereby, the particulates (dust) can be accurately detected by the particulates concentration sensor 6, and the measurement accuracy of the particulates concentration sensor 6 can be enhanced.

Also in this modification, a rib 10 d is provided between the intake passage 61 and the exhaust passage 62.

In the modification shown in FIG. 5, the particle concentration sensor 6 is provided in the space of the bulging portion 48, but the particle concentration sensor 6 is attached to the outer surface of the bulging portion 48 or another member, and the bulging portion 48 is The intake flow passage 61 and the exhaust flow passage 62 may be opened in the space in the bulging portion 48 through a penetrating through hole, a tube or the like.

As mentioned above, although the embodiment of the present invention was described, the above-mentioned embodiment showed only a part of application example of the present invention, and in the meaning of limiting the technical scope of the present invention to the concrete composition of the above-mentioned embodiment. Absent.

The present application claims priority based on Japanese Patent Application No. 2017-129444 filed on Jun. 30, 2017, and the entire contents of this application are incorporated herein by reference.

Claims

An air conditioner,
An outside air inlet for introducing air from the outside of the vehicle,
A fresh air inlet for introducing air from the interior of the vehicle;
An intake door for opening and closing the outside air inlet and the inside air inlet;
An inflow passage provided downstream of the intake door and into which the air introduced from the outside air inlet and the inside air inlet flows;
A particle concentration detector for detecting the concentration of particles in the inflow channel;
The particle concentration detector is
An intake flow passage for drawing air into the particulate matter concentration detector;
And an exhaust flow path for discharging air to the outside of the particulate matter concentration detector,
The intake passage and the exhaust passage open to the inflow passage,
Air conditioner.
An air conditioner according to claim 1, wherein
A filter provided in the inflow channel;
And a case for housing the filter.
The intake passage and the exhaust passage open in a gap between a side surface of the filter and the housing.
Air conditioner.
An air conditioner according to claim 2, wherein
An outlet formed in the housing for attaching and detaching the filter;
And a lid member closing the outlet.
The intake passage and the exhaust passage are opened in the gap through the lid member.
Air conditioner.
An air conditioner according to claim 3, wherein
The particulate matter concentration detector is attached to the lid member,
Air conditioner.
The air conditioner according to claim 3 or 4, wherein
The lid member includes a rib projecting in a direction toward the filter,
The intake passage and the exhaust passage open in the gap with the rib interposed therebetween.
Air conditioner.
The air conditioner according to any one of claims 3 to 5, wherein
The lid member includes a rib projecting in a direction toward the filter,
The rib abuts on the filter and regulates movement of the filter.
Air conditioner.
An air conditioner according to claim 3, wherein
The lid member includes a bulging portion that bulges outward.
The intake passage and the exhaust passage open into a space in the bulging portion,
Air conditioner.
An air conditioner according to claim 2, wherein
The housing has a side surface portion provided with a support portion for rotatably supporting a swing shaft of the intake door,
The intake flow passage and the exhaust flow passage open in the side surface portion provided with the support portion,
Air conditioner.
An air conditioner according to claim 8, wherein
The particulate matter concentration detector is attached to the side face portion,
Air conditioner.