CN108430814B - Air conditioner for vehicle - Google Patents
Air conditioner for vehicle Download PDFInfo
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- CN108430814B CN108430814B CN201680065880.8A CN201680065880A CN108430814B CN 108430814 B CN108430814 B CN 108430814B CN 201680065880 A CN201680065880 A CN 201680065880A CN 108430814 B CN108430814 B CN 108430814B
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- 238000004378 air conditioning Methods 0.000 claims abstract description 156
- 239000000428 dust Substances 0.000 claims abstract description 88
- 238000004891 communication Methods 0.000 claims abstract description 55
- 238000004140 cleaning Methods 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims description 54
- 230000008569 process Effects 0.000 claims description 37
- 238000010438 heat treatment Methods 0.000 claims description 12
- 230000001143 conditioned effect Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 abstract description 29
- 238000012545 processing Methods 0.000 description 26
- 238000012986 modification Methods 0.000 description 20
- 230000004048 modification Effects 0.000 description 20
- 239000000203 mixture Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 8
- 230000006870 function Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- 230000003750 conditioning effect Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
- B60H1/008—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being air quality
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air-Conditioning For Vehicles (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
An air conditioner for a vehicle, which can maintain the detection capability of a dust sensor while saving the time and effort for cleaning the dust sensor by a passenger. An air conditioning device (1) for a vehicle is provided with: an air-conditioning duct (10) in which an air passage (11) is formed inside the air-conditioning duct (10), the air passage (11) guiding air-conditioning air that conditions the interior of a vehicle interior to the vehicle interior via an air outlet; an air conditioning unit (20), the air conditioning unit (20) being disposed in the air passage, the air conditioning unit generating the air conditioning wind using air introduced into the air passage from outside the air conditioning duct; a control unit (80), wherein the control unit (80) controls the air conditioning unit; and a dust sensor (70), wherein the dust sensor (70) has a communication passage for communicating the inside of the air-conditioning duct with the outside, and detects the concentration of dust in the air flowing through the communication passage. The control unit has a control mode in which the air conditioning unit is controlled to remove dust deposited on the communication path.
Description
Cross reference to related applications
The present application is based on and claims priority from Japanese patent application No. 2015-222042, filed 11/12/2015 and Japanese patent application No. 2016-199989, filed 10/11/2016, the entire contents of which are incorporated herein by reference.
Technical Field
The present invention relates to an air conditioner for a vehicle.
Background
Conventionally, an air conditioning device for a vehicle described in patent document 1 is known. In the air conditioning device for a vehicle described in patent document 1, air inside or outside the vehicle interior is taken into the air conditioning duct. An evaporator and a heater core are disposed in the air conditioning duct. The air introduced into the air-conditioning duct is cooled by the evaporator and heated by the heater core. In this vehicle air conditioner, cooled or heated air is blown into the vehicle interior through the air outlet in the air conditioning duct, thereby adjusting the temperature in the vehicle interior to a set temperature. The set temperature is a temperature set by an occupant of the vehicle.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2008-24032
In recent years, since dust such as Particulate Matter (PM) in the air affects health, there is a demand for solving the concentration of the dust in the vehicle interior. In order to meet this demand, for example, a method is considered in which a dust sensor is provided in an air conditioning duct of a vehicle air conditioning system, and the dust concentration detected by the dust sensor is displayed on a display unit in a vehicle interior.
However, the dust sensor has such characteristics: when dust is accumulated on the detection portion, the output signal changes by detecting the dust. Therefore, the dust sensor needs to be cleaned periodically to remove dust at the detection portion. On the other hand, the air conditioning duct is generally disposed in the dashboard of the vehicle. Therefore, when the air conditioning duct is provided with the dust sensor, the dust sensor is also disposed inside the instrument panel. In this case, periodic cleaning of the dust sensor becomes difficult, and as a result, the detection capability of the dust sensor may not be maintained.
Disclosure of Invention
The invention aims to provide an air conditioner for a vehicle, which can save the cleaning time of a dust sensor by a passenger and maintain the detection capability of the dust sensor.
An air conditioning device for a vehicle according to an aspect of the present invention includes an air conditioning duct, an air conditioning unit, a control unit, and a dust sensor. An air passage is formed inside the air-conditioning duct, and the air passage guides air-conditioning air for conditioning the vehicle interior into the vehicle interior through the air outlet. The air conditioning unit is disposed in the air passage, and generates air-conditioned air using air introduced into the air passage from outside the air-conditioning duct. The control unit controls the air conditioning unit. The dust sensor has a communication passage for communicating the inside of the air conditioning duct with the outside, and detects the dust concentration in the air flowing through the communication passage. The control unit has a control mode in which the air conditioning unit is controlled to remove dust deposited on the communication path.
With this configuration, when the control unit executes the control mode, the amount of air flowing through the communication passage of the dust sensor is increased, and therefore dust accumulated in the communication passage can be removed. Thus, the cleaning of the dust sensor can be saved, and the detection capability of the dust sensor can be maintained.
Drawings
Fig. 1 is a block diagram showing a schematic configuration of a vehicular air conditioning device according to a first embodiment.
Fig. 2 is an enlarged view showing an enlarged structure of the dust sensor according to the first embodiment.
Fig. 3 is a graph showing an example of the output of the dust sensor according to the first embodiment.
Fig. 4 is a flowchart showing the procedure of processing executed by the ECU of the first embodiment.
Fig. 5 is a flowchart showing the procedure of processing executed by the ECU according to the second modification of the first embodiment.
Fig. 6 is a flowchart showing the procedure of processing executed by the ECU of the second embodiment.
Fig. 7 is a flowchart showing a procedure of processing executed by the ECU according to the modification of the second embodiment.
Fig. 8 is a flowchart showing the procedure of processing executed by the ECU of the third embodiment.
Fig. 9 is a flowchart showing the procedure of processing executed by the ECU according to the first modification of the third embodiment.
Fig. 10 is a flowchart showing the procedure of processing executed by the ECU according to the second modification of the third embodiment.
Fig. 11 is a flowchart showing a procedure of processing executed by the ECU according to the second modification of the third embodiment.
Fig. 12 is a flowchart showing the procedure of processing executed by the ECU of the fourth embodiment.
Fig. 13 is a flowchart showing the procedure of processing executed by the ECU of the fifth embodiment.
Detailed Description
< first embodiment >
A first embodiment of an air conditioner for a vehicle will be described below.
As shown in fig. 1, the vehicle air conditioner 1 of the present embodiment includes an air conditioning duct 10 and an air conditioning unit 20. The vehicle air conditioner 1 is provided inside the dashboard of a vehicle.
An air passage 11 for introducing air conditioning air for conditioning the vehicle interior into the vehicle interior is formed inside the air conditioning duct 10. In the air passage 11, air flows in a direction indicated by an arrow a in the figure.
An outside air suction port 12 and an inside air suction port 13 are formed in a portion on the upstream side of the air-conditioning duct 10 in the air flow direction a as a portion into which air is introduced from the outside of the air-conditioning duct 10 into the air passage 11. Specifically, the outside air inlet 12 is a portion for introducing outside air, which is air outside the vehicle compartment, into the air passage 11. The interior air intake port 13 is a portion for introducing interior air, which is air in the vehicle interior, into the air passage 11.
A defroster air outlet 14, a face air outlet 15, and a foot air outlet 16 are formed in a portion on the downstream side in the air flow direction a of the air-conditioning duct 10. The defroster air outlet 14 blows out air flowing along the inside of the air conditioning duct 10 toward the inner surface of the front glass of the vehicle. The face air outlet 15 blows out the air flowing along the inside of the air-conditioning duct 10 toward the driver or the passenger in the front passenger seat. The foot outlet 16 blows out the air flowing along the inside of the air-conditioning duct 10 toward the feet of the driver or the passenger in the front passenger seat.
The air conditioning unit 20 generates conditioned air using air introduced into the air passage 11 from the outside air intake port 12 or the inside air intake port 13. The air-conditioned air is air for air-conditioning the vehicle interior. The air conditioning unit 20 has a blower fan 21, an evaporator 22, and a heater core 23.
The blower fan 21 is disposed on the downstream side in the air flow direction a of the outer air intake port 12 and the inner air intake port 13. The blower fan 21 is rotated by energization to generate an air flow in the air passage 11. By adjusting the amount of current supplied to blower fan 21, the air volume of the air flowing along air passage 11, in other words, the air volume of the conditioned air, is adjusted.
The evaporator 22 is disposed on the downstream side of the blower fan 21 in the air flow direction a. The evaporator 22 is a component of a refrigeration cycle not shown. The refrigeration cycle includes a compressor, a condenser, and an expansion valve, in addition to the evaporator 22. In the refrigeration cycle, refrigerant circulates in the order of a compressor, a condenser, an expansion valve, and an evaporator 22. In the evaporator 22, the refrigerant flowing inside exchanges heat with the air in the air passage 11, thereby evaporating and vaporizing the refrigerant. The evaporator 22 has a function of cooling air in the air passage 11 by heat of vaporization at the time of vaporizing the refrigerant, and a function of dehumidifying air in the air passage 11.
The heater core 23 is disposed on the downstream side of the evaporator 22 in the air flow direction a. The heater core 23 is connected to an engine, not shown, via a pipe. The engine cooling water is circulated between the engine and the heater core 23 through the pipe. The heater core 23 heats air in the air passage 11 using engine cooling water flowing therein as a heat source.
The air conditioning unit 20 includes an inside/outside air switching door 24, an air mixing door 25, and outlet switching doors 26, 27, and 28.
The inside/outside air switching door 24 opens and closes the outside air intake port 12 and the inside air intake port 13. When the inside/outside air switching door 24 is located at the inside air introducing position shown by the solid line in the figure, the outside air suction port 12 is closed and the inside air suction port 13 is opened. In this case, the vehicle air conditioner 1 is set to the indoor air circulation mode in which the indoor air is taken into the air passage 11 through the indoor air intake port 13. On the other hand, when the inside/outside air switching door 24 is located at the outside air introducing position indicated by the broken line in the figure, the inside air suction port 13 is closed and the outside air suction port 12 is opened. In this case, the vehicle air conditioner 1 is set to the outside air introducing mode in which the outside air is introduced into the air passage 11 from the outside air inlet 12.
The air mix door 25 adjusts the ratio of the air volume of the air flowing into the heater core 23 to the air volume of the air bypassing the heater core 23. Specifically, the position of the air mix door 25 can be adjusted between a maximum heating position shown by a solid line in the figure and a maximum cooling position shown by a broken line in the figure. In the case where the position of the air mix door 25 is the maximum heating position, since almost all of the air passing through the evaporator 22 passes through the heater core 23, the temperature of the air-conditioned air is increased most. In the case where the position of the air mix door 25 is the maximum cooling position, almost all of the air passing through the evaporator 22 bypasses the heater core 23. In this case, the air cooled by the evaporator 22 flows to the respective air outlets 14 to 16 as it is, and therefore the temperature of the air-conditioned air is reduced most. In the vehicle air conditioner 1, the temperature of the conditioned air is adjusted by adjusting the opening degree of the air mix door 25 between the maximum heating position and the maximum cooling position.
The air outlet switching doors 26 to 28 switch the open/close states of the defroster air outlet 14, the face air outlet 15, and the foot air outlet 16. When at least one of the outlet switching doors 26 to 28 is opened, the conditioned air is blown out from the opened outlet into the vehicle interior.
Next, an electrical configuration of the air conditioner 1 for a vehicle will be described.
The air conditioner 1 for a vehicle includes an operation Unit 60, a display Unit 61, a dust sensor 70, and an ECU (Electronic Control Unit) 80. In the present embodiment, the ECU80 corresponds to a control unit.
The operation unit 60 is a part that is operated by the driver to adjust the air volume, temperature, and the like of the air-conditioned air. The operation unit 60 is disposed on, for example, an instrument panel of the vehicle. The operation unit 60 can select, for example, any one of an outside air introduction mode and an inside air circulation mode. In addition, the operation unit 60 can set the air volume of the air-conditioned air, the temperature of the air-conditioned air, the air outlet of the air-conditioned air, and the like. The operation unit 60 outputs these pieces of operation information to the ECU 80.
The display unit 61 is a portion that displays various information of the vehicle air conditioner 1. In the present embodiment, the display unit of the car navigation device of the vehicle is replaced with the display unit 61 of the air conditioner 1 for the vehicle. The display unit 61 may be configured exclusively for the vehicle air conditioner 1.
The dust sensor 70 is provided at a position between the blower fan 21 and the evaporator 22 on the outer wall of the air-conditioning duct 10. The dust sensor 70 detects the concentration of dust in the air flowing along the air passage 11.
Specifically, as shown in fig. 2, the dust sensor 70 is provided with a communication passage 700 for communicating the inside of the air-conditioning duct 10 with the outside. The dust sensor 70 includes, for example, a light emitting element that irradiates the communication path 700 with light, and a light receiving element that receives light irradiated from the light emitting element. The light receiving element outputs a voltage signal corresponding to the received light. The dust sensor 70 outputs a voltage signal corresponding to the output voltage of the light receiving element as a detection signal Vd. The amount of light received by the light receiving element changes according to the dust concentration in the air passing through the communication path 700. That is, the detection signal Vd of the dust sensor 70 changes according to the concentration of dust in the air passing through the communication passage 700, in other words, the concentration of dust in the air passage 11. Specifically, as shown in FIG. 3, the detection signal Vd of the dust sensor 70 is 0[ μ g/m ] in the dust concentration3]Time, represents the reference voltage Voc. The detection signal Vd of the dust sensor 70 becomes a constant value when the dust concentration increases with an increase in the dust concentration and reaches a predetermined concentration or higher.
Detection signals of various sensors and switches for detecting the state of the vehicle are input to the ECU 80. For example, as shown in fig. 1, detection signals of the seating sensor 71 and the ignition switch 72 are input to the ECU 80. The seating sensor 71 detects whether or not an occupant is seated in a seat of the vehicle, and outputs a detection signal corresponding to the detection result. The ignition switch 72 is operated by the driver when the engine of the vehicle is started. The ignition switch 72 outputs a detection signal corresponding to the on operation and the off operation by the driver.
The ECU80 is configured to be centered on a microcomputer having a CPU, a memory, and the like. The ECU80 acquires operation information from the operation unit 60, and drives the air conditioning unit 20 based on the acquired operation information. Thereby, the air conditioning unit 20 generates air conditioning air corresponding to the operation information of the operation unit 60. That is, the ECU80 controls the air conditioning unit 20 to generate the air-conditioned air corresponding to the operation information of the operation portion 60. Hereinafter, the control mode of the ECU80 will be referred to as "air-conditioning mode".
The ECU80 receives the detection signal Vd from the dust sensor 70. The ECU80 calculates the dust concentration based on the detection signal Vd from the dust sensor 70, and displays the calculated dust concentration on the display unit 61.
However, in the dust sensor 70, dust accumulates in the communication path 700 over time. When the dust is detected by the dust sensor 70, the reference voltage Voc of the dust sensor 70 rises by a predetermined voltage Δ V corresponding to the accumulated dust, as shown by the two-dot chain line in fig. 3. In such a situation, the dust concentration in the air may not be detected with good accuracy.
Here, ECU80 of the present embodiment temporarily stops the air conditioning function of vehicle air conditioner 1 and executes the sensor cleaning mode for removing dust in communication path 700. Specifically, the sensor cleaning mode is a control mode in which: air conditioning unit 20 is controlled so that the amount of air flowing through communication passage 700 is larger than that in the air conditioning mode, thereby removing dust from communication passage 700. In the present embodiment, the sensor cleaning mode corresponds to a control mode for removing dust accumulated on the dust sensor 70.
On the other hand, while the ECU80 executes the sensor cleaning mode, the air conditioning function of the vehicle air conditioner 1 is temporarily stopped. That is, since air conditioning of the vehicle interior is not performed, a temperature in the vehicle interior deviates from a set temperature, or a window glass generates a fog, or the like. Such a phenomenon may cause a sense of discomfort to the driver. Here, the ECU80 detects whether or not an occupant is present in the vehicle interior based on the detection signal of the seating sensor 71, and executes the sensor cleaning mode on condition that no occupant is present in the vehicle interior.
Next, a specific procedure of the sensor cleaning mode executed by the ECU80 will be described with reference to fig. 4. The processing shown in fig. 4 is executed when the ignition switch 72 is turned on.
As shown in fig. 4, first, as the process of step S10, the ECU80 determines whether or not an occupant is present in the vehicle interior. Specifically, the ECU80 determines that the occupant of the vehicle is not present in the vehicle interior when it is detected that the occupant is not seated in the seat of the vehicle based on the detection signal of the seating sensor 71. In this case, the ECU80 makes a negative determination according to the process of step S10. When a negative determination is made in the process of step S10, ECU80 changes the air conditioning mode and switches to the sensor cleaning mode. The ECU80 switched to the sensor cleaning mode executes the processing shown in steps S11 to S14.
Specifically, as the process of step S11, the ECU80 moves the inside/outside air switching door 24 to the inside air introducing position regardless of the operation information of the operation unit 60. When the inside/outside air switching door 24 is at the inside air introducing position, the ECU80 maintains the position of the inside/outside air switching door 24 as it is. Accordingly, compared to the case where outside air is introduced into the air passage 11 from the outside air inlet 12, the amount of air flowing through the communication passage 700 can be increased because air is more easily introduced into the air passage 11.
As the process of step S12 following step S11, the ECU80 moves the air mix door 25 to the maximum heating position regardless of the operation information of the operation unit 60. In the case where the air mix door 25 has been located at the maximum heating position, the ECU80 holds the position of the air mix door 25 as it is. Accordingly, since the air volume of the air flowing into the heater core 23 is the maximum air volume, the heater core 23 acts as ventilation resistance to the air flowing through the air passage 11, thereby increasing the air pressure in the air passage 11. Therefore, the air volume of the air flowing through the communication path 700 can be increased.
As the processing of step S13 following step S12, the ECU80 moves the air outlet switching doors 26 to 28 to the closed positions at which the defroster air outlet 14, the face air outlet 15, and the foot air outlet 16 are fully closed, regardless of the operation information of the operation unit 60. This closes the air outlet on the downstream side of the air passage 11 in the air flow direction a, and therefore the air in the air passage 11 easily flows through the communication path 700. That is, the air volume of the air flowing through communication path 700 can be increased.
As the processing of step S14 following step S13, the ECU80 sets the air volume of the blower fan 21 to the maximum air volume regardless of the operation information of the operation unit 60. Here, the maximum air volume is larger than the upper limit set value of the air volume of blower fan 21 that can be set in the air-conditioning mode. Accordingly, the air volume of the air in air passage 11 increases, and therefore the air volume of the air flowing through communication passage 700 can be increased.
According to the vehicle air conditioner 1 of the present embodiment described above, the following operations and effects (1) to (6) can be obtained.
(1) The ECU80 has a sensor cleaning mode as a control mode of the air conditioning unit 20, in addition to the air conditioning mode of the air conditioning unit 20 that generates the conditioned air. The sensor cleaning mode is the following control mode: air-conditioning unit 20 is controlled so that the air volume of the air flowing through communication passage 700 of dust sensor 70 is increased as compared to the air-conditioning mode. By increasing the air volume of the air flowing through the communication path 700, dust accumulated in the communication path 700 can be removed. This makes it possible to maintain the detection capability of the dust sensor 70 while saving the time and effort for cleaning the dust sensor 70 by the passenger.
(2) ECU80 adjusts the air volume of blower fan 21 so that the air volume flowing through communication passage 700 is larger when the sensor cleaning mode is executed than when the air conditioning mode is executed. Specifically, the ECU80 sets the air volume of the blower fan 21 to the maximum air volume regardless of the operation information of the operation unit 60. This facilitates the inflow of air into the communication path 700, and therefore, dust deposited on the communication path 700 can be removed more reliably.
(3) When the sensor cleaning mode is executed, ECU80 switches the open/close state of outlet switching doors 26-28 so that the volume of air flowing through communication path 700 is increased as compared to when the air conditioning mode is executed. Specifically, regardless of the operation information of the operation unit 60, the ECU80 moves the air outlet switching doors 26 to 28 to the closed positions at which the defroster air outlet 14, the face air outlet 15, and the foot air outlet 16 are all in the fully closed state. This facilitates the inflow of air into the communication path 700, and therefore, dust deposited on the communication path 700 can be removed more reliably.
(4) ECU80 adjusts the opening degree of air mix door 25 so that the volume of air flowing through communication passage 700 is larger when the sensor cleaning mode is executed than when the air conditioning mode is executed. Specifically, the ECU80 moves the air mix door 25 to the maximum heating position regardless of the operation information of the operation unit 60. In other words, the ECU80 adjusts the position of the air mix door 25 so that the air volume of the air flowing into the heater core 23 becomes the maximum air volume. This facilitates the inflow of air into the communication path 700, and therefore, dust deposited on the communication path 700 can be removed more reliably.
(5) The ECU80 executes the sensor cleaning mode on condition that no occupant is present in the vehicle interior. This makes it possible to remove dust accumulated in the communication path 700 without giving an uncomfortable feeling to the occupant.
(6) The ECU80 detects the seating state of an occupant in a seat of the vehicle using the seating sensor 71, and determines whether or not the occupant is present in the vehicle compartment based on the seating state of the occupant. This makes it possible to easily detect whether or not an occupant is present in the vehicle interior.
(first modification)
Next, a first modification of the vehicle air conditioner 1 according to the first embodiment will be described.
As shown by the broken line in fig. 1, the ECU80 of the present modification receives an input of a detection signal from the door opening/closing sensor 73. The door opening/closing sensor 73 detects the open/closed state of the vehicle door, and outputs a detection signal corresponding to the detected open/closed state of the vehicle door. In the process of step S10 shown in fig. 4, the ECU80 determines whether or not an occupant is present in the vehicle interior based on the detection signal of the door opening/closing sensor 73. Specifically, the ECU80 monitors the open/close state of the vehicle door based on the detection signal of the door opening/closing sensor 73 after detecting the closing operation of the ignition switch 72. When it is detected that the vehicle door is in the closed state after being in the open state, the ECU80 determines that no occupant is present in the vehicle interior, and makes a negative determination in the process of step S10. In the above-described configuration, the presence or absence of an occupant in the vehicle compartment can be easily detected.
(second modification)
Next, a second modification of the vehicle air conditioner 1 according to the first embodiment will be described.
As shown in fig. 5, when the process of step S10 is a negative determination, the ECU80 of the present modification determines whether or not a predetermined time T1 has elapsed since the time at which the absence of the occupant in the vehicle interior is detected as the process of step S15. If a negative determination is made in the process of step S15, the ECU80 returns to the process of step S10. When the ECU80 makes an affirmative determination in the processing of step S15, that is, after a predetermined time T1 has elapsed from the time when it is detected that no occupant is present in the vehicle interior, the processing of steps S11 to S14 is executed as the sensor cleaning mode. According to the above configuration, since the sensor cleaning mode is easily executed at a point in time when no occupant is present in the vehicle interior, it is possible to more reliably avoid a feeling of discomfort of the occupant.
< second embodiment >
Next, a second embodiment of the air conditioner 1 for a vehicle will be described. Hereinafter, differences from the first embodiment will be mainly described.
As shown by a broken line in fig. 1, the ECU80 of the present embodiment receives an input of a detection signal of the shift sensor 74. The shift sensor 74 detects a shift position that is an operation position of a shift lever of the vehicle, and outputs a detection signal corresponding to the detected shift position. The shift range can be switched to any one of a parking range, a neutral range, a driving range, and a reverse range.
Next, a specific procedure of the sensor cleaning mode executed by the ECU80 will be described with reference to fig. 6.
As shown in fig. 6, the ECU80 first determines whether the vehicle is traveling as the process of step S20. Specifically, the ECU80 determines that the vehicle is not running when it detects that the current shift position is the parking position based on the detection signal of the shift sensor 74. If it is determined that the vehicle is not running, the ECU80 makes a negative determination in the process of step S20 and executes the processes of steps S11 to S14 as the sensor cleaning mode.
According to the vehicle air conditioner 1 of the present embodiment described above, in addition to the operations and effects shown in (1) to (5) of the first embodiment, the operation and effect shown in (7) below can be obtained.
(7) The ECU80 executes the sensor cleaning mode on condition that the vehicle is not running. Thus, the sensor cleaning mode can be prevented from being executed while the vehicle is traveling, and therefore, dust deposited on communication path 700 can be removed without causing discomfort to the occupant.
(modification example)
Next, a modified example of the vehicle air conditioner 1 according to the second embodiment will be described.
As shown in fig. 7, when the process of step S20 is a negative determination, the ECU80 of the present modification determines whether or not a predetermined time T2 has elapsed since the time at which the vehicle was detected not to travel as the process of step S21. If a negative determination is made in the process of step S21, the ECU80 returns to the process of step S20. If the ECU80 makes an affirmative determination in the processing of step S21, that is, after a predetermined time T2 has elapsed from the time when it is detected that the vehicle is not running, the processing of steps S11 to S14 is executed as the sensor cleaning mode. With the above configuration, since the sensor cleaning mode is easily executed in a situation where the vehicle is not running, it is possible to more reliably avoid the uncomfortable feeling of the occupant.
< third embodiment >
Next, a third embodiment of the air conditioner 1 for a vehicle will be described. Hereinafter, differences from the first embodiment will be mainly described.
As shown in fig. 8, the ECU80 of the present embodiment first determines whether or not the ignition switch 72 has been turned off as a process of step S30. When determining that the ignition switch 72 has been turned off, the ECU80 makes an affirmative determination in the process of step S30, and executes the processes of steps S11 to S14 as the sensor cleaning mode.
According to the vehicle air conditioner 1 of the present embodiment described above, in addition to the operations and effects shown in (1) to (5) of the first embodiment, the operations and effects shown in (8) below can be obtained.
(8) The ECU80 executes the sensor purge mode on condition that the ignition switch 72 is turned off. Thus, since the sensor cleaning mode can be prevented from being executed during driving, dust accumulated in communication path 700 can be removed without causing discomfort to the occupant.
(first modification)
Next, a first modification of the vehicle air conditioner 1 according to the third embodiment will be described.
As shown in fig. 9, when the process of step S30 is a negative determination, the ECU80 of the present modification determines whether or not a predetermined time T3 has elapsed from the time point at which the off operation of the ignition switch 72 is detected as the process of step S31. If a negative determination is made in the process of step S31, the ECU80 returns to the process of step S30. When the process of step S31 is an affirmative determination, that is, after a predetermined time T3 has elapsed from the time when the ignition switch 72 was detected to be turned off, the ECU80 executes the processes of steps S11 to S14 as the sensor cleaning mode. According to the above configuration, since the sensor cleaning mode is easily executed in a situation where the vehicle is not driven, it is possible to more reliably avoid discomfort to the occupant.
(second modification)
Next, a second modification of the vehicle air conditioner 1 according to the third embodiment will be described.
As shown by the broken line in fig. 1, a detection signal of the start switch 75 of the vehicle is input to the ECU80 of the present embodiment. The start switch 75 is operated when starting and stopping the vehicle in a hybrid vehicle, an electric vehicle, or the like. The start switch 75 is usually provided in the vehicle instead of the ignition switch 72.
As shown in fig. 10, the ECU80 of the present modification determines whether or not the vehicle stop operation has been performed on the start switch 75 as the process of step S30. With the above-described configuration, the same operation and effects as those of the vehicular air conditioning device 1 according to the third embodiment can be obtained even in a hybrid vehicle or an electric vehicle provided with the start switch 75.
Further, as shown in fig. 11, the ECU80 of the first modification of the third embodiment may determine whether or not the predetermined time T3 has elapsed from the time when the off operation of the vehicle start switch is detected as the processing of step S31.
< fourth embodiment >
Next, a fourth embodiment of the air conditioner 1 for a vehicle will be described. Hereinafter, differences from the first embodiment will be mainly described.
As shown by the broken line in fig. 1, the ECU80 of the present embodiment has a timer 81. The ECU80 executes the processing shown in fig. 12 in a predetermined calculation cycle based on the time measured by the timer 81, regardless of whether the air conditioning mode is executed.
As shown in fig. 12, the ECU80 first determines whether or not the measurement time of the timer 81 has reached a predetermined time T4 in step S41 after the measurement of the timer 81 is started as a process in step S40. The predetermined time T4 is set to be sufficiently longer than the calculation cycle of the ECU 80. The predetermined time T4 is set to a time corresponding to one month, for example.
If an affirmative determination is made in step S41, that is, if the time measured by the timer 81 reaches a predetermined time T4 set in advance, the ECU80 executes the processing of steps S11 to S14. After the process of step S14 is executed, the ECU80 temporarily terminates a series of processes after the measurement time of the timer 81 is reset to zero as the process of step S42. When the ECU80 performs the processing shown in fig. 12 after the predetermined calculation cycle has elapsed, the ECU80 restarts measuring the time of the timer 81 as the processing of step S40. Thus, ECU80 executes the control mode corresponding to steps S11 to S14, that is, the control mode for controlling air conditioning unit 20 to remove dust accumulated in communication path 700, at a cycle of predetermined time T4.
According to the air conditioning device 1 for a vehicle of the present embodiment described above, the following operation and effect (9) can be obtained.
(9) ECU80 executes a control mode for controlling air conditioning unit 20 at a predetermined cycle to remove dust accumulated in communication path 700 regardless of whether or not the air conditioning mode is executed. This enables the dust accumulated in the communication path 700 to be removed regardless of the execution of the air conditioning mode.
< fifth embodiment >
Next, a fifth embodiment of the air conditioner 1 for a vehicle will be described. Hereinafter, differences from the first embodiment will be mainly described.
As shown in fig. 13, ECU80 of the present embodiment first determines whether or not the air volume of blower fan 21 is set to the upper limit set value as step S50. The upper limit set value is an upper limit value of the air volume of the blower fan 21 that can be set in the air-conditioning mode. If an affirmative determination is made in the processing of step S50, that is, if the air volume of the blower fan 21 is set to the upper limit set value, the ECU80 executes the processing of steps S11 to S13.
According to the air conditioning device 1 for a vehicle of the present embodiment described above, the following operation and effect (10) can be obtained.
(10) The ECU80 moves the air outlet switching doors 26 to 28 to the closed positions at which the defroster air outlet 14, the face air outlet 15, and the foot air outlet 16 are all fully closed, and moves the air mix door 25 to the maximum heating position, on the condition that the air volume of the blower fan 21 is set to the upper limit set value that can be set in the air-conditioning mode. Accordingly, when the driver operates the operation unit 60 to set the air volume of the blower fan 21 to the upper limit set value, the process of removing the dust accumulated in the communication passage 700 is automatically performed, and therefore the dust accumulated in the communication passage 700 can be more reliably removed.
< other embodiment >
The embodiments can be implemented by the following embodiments.
The ECU80 of the first embodiment may determine whether or not an occupant is present in the vehicle interior by a method different from the method using the seating sensor 71 and the door opening/closing sensor 73. For example, the ECU80 determines that there is no occupant in the vehicle interior when all the doors of the vehicle are locked after the closing operation of the ignition switch 72 is detected.
The ECU80 of the second embodiment may determine whether the vehicle is running by a method different from the method using the shift sensor 74. For example, the ECU80 may determine that the vehicle is not running when the running speed of the vehicle is 0 km/h for a predetermined time.
When the process of step S14 in fig. 4 to 9 is executed, the ECU80 may set the air volume of the blower fan 21 to an air volume different from the maximum air volume. In short, ECU80 may adjust the air volume of blower fan 21 so that the air volume flowing through communication passage 700 is larger when the sensor cleaning mode is executed than when the air conditioning mode is executed.
The ECU80 may execute at least one of the processes in steps S11 to S14 as the sensor cleaning mode or the control mode.
The ECU80 may execute the sensor cleaning mode at predetermined cycles. That is, the ECU80 may execute the processing of steps S11 to S14 shown in fig. 4 at a predetermined cycle. The predetermined period is set in advance by an experiment or the like so that the detection capability of the dust sensor 70 can be maintained.
The mechanisms and/or functions provided by the ECU80 can be provided by software stored in a physical storage device and a computer executing the software, software only, hardware only, or a combination thereof. For example, in the case where the ECU80 is provided by an electronic circuit as hardware, the ECU80 can be provided by a digital circuit or an analog circuit including a plurality of logic circuits.
The present invention is not limited to the above specific examples. That is, the appropriate design changes of the specific examples described above by those skilled in the art are included in the scope of the present invention as long as the characteristics of the present invention are included. For example, the elements, arrangement, conditions, and the like having the specific examples described above are not limited to the exemplary configurations, and can be appropriately modified. The elements of the above-described embodiments can be combined as long as they are technically possible, and a structure obtained by combining these elements is included in the scope of the present invention as long as it includes the features of the present invention.
Claims (27)
1. An air conditioning device for a vehicle, comprising:
an air-conditioning duct (10) in which an air passage (11) is formed inside the air-conditioning duct (10), the air passage (11) guiding air-conditioning air that conditions the interior of a vehicle interior to the vehicle interior via an air outlet;
an air conditioning unit (20), the air conditioning unit (20) being disposed in the air passage, the air conditioning unit generating the air conditioning wind using air introduced into the air passage from outside the air conditioning duct;
a control unit (80), wherein the control unit (80) controls the air conditioning unit; and
a dust sensor (70) that has a communication passage (700) that communicates the inside of the air conditioning duct with the outside, and that detects the concentration of dust in the air flowing through the communication passage,
the control unit has a control mode in which the air conditioning unit is controlled to remove dust accumulated in the communication path,
the control mode is a sensor cleaning mode provided independently of an air conditioning mode in which the air conditioning unit is controlled to generate the conditioned air, in which the air conditioning unit is controlled so that an air volume of air flowing through the communication passage is increased as compared to when the air conditioning mode is executed,
the air conditioning unit has air outlet switching doors (26, 27, 28) for switching the open/closed state of the air outlet,
the control unit switches the open/close state of the outlet switching door so that the volume of air flowing through the communication path is increased as compared to when the air conditioning mode is executed, when the sensor cleaning mode is executed.
2. The air conditioning device for a vehicle according to claim 1,
the air conditioning unit has a blower fan (21) that adjusts the air volume of the air-conditioned air,
the control unit adjusts the air volume of the blower fan so that the air volume of the air flowing through the communication passage is increased when the sensor cleaning mode is executed, as compared with when the air conditioning mode is executed.
3. The air conditioning device for a vehicle according to claim 1,
the air conditioning unit includes:
a heater core (23), the heater core (23) heating air flowing in the air passage; and
an air mix door (25), the air mix door (25) adjusting an air volume of air flowing into the heater core and an air volume of air bypassing the heater core,
the control unit adjusts the position of the air mix door so that the volume of air flowing through the communication passage is increased when the sensor cleaning mode is executed, as compared with when the air conditioning mode is executed.
4. The air conditioning device for a vehicle according to claim 1,
the control unit executes the control mode on condition that it is detected that the occupant is not present in the vehicle interior.
5. The air conditioning device for a vehicle according to claim 4,
the control unit determines whether or not an occupant is present in the vehicle compartment based on a seating state of the occupant on a seat of the vehicle.
6. The air conditioning device for a vehicle according to claim 4,
the control portion determines whether an occupant is present in the vehicle compartment based on an open-closed state of a vehicle door.
7. An air conditioning device for a vehicle according to any one of claims 4 to 6,
the control unit executes the control mode after a predetermined time has elapsed from a time point at which it is detected that no occupant is present in the vehicle interior.
8. An air conditioning device for a vehicle according to any one of claims 1 to 3,
the control unit executes the control mode on condition that it is detected that the vehicle is not running.
9. An air conditioning device for a vehicle according to claim 8,
the control unit executes the control mode after a predetermined time has elapsed from a time point at which it is detected that the vehicle is not traveling.
10. An air conditioning device for a vehicle according to any one of claims 1 to 3,
the control portion executes the control mode on condition that an ignition switch of a vehicle is turned off.
11. An air conditioning device for a vehicle according to claim 10,
the control unit executes the control mode after a predetermined time has elapsed from a time point at which the turning-off operation of the ignition switch is detected.
12. An air conditioning device for a vehicle according to any one of claims 1 to 3,
the control unit executes the control pattern at a predetermined cycle.
13. An air conditioning device for a vehicle according to any one of claims 1 to 3,
the control unit executes the control mode on the condition that a vehicle stop operation is performed on a start switch (75) that is operated when the vehicle is started and stopped.
14. An air conditioning device for a vehicle, comprising:
an air-conditioning duct (10) in which an air passage (11) is formed inside the air-conditioning duct (10), the air passage (11) guiding air-conditioning air that conditions the interior of a vehicle interior to the vehicle interior via an air outlet;
an air conditioning unit (20), the air conditioning unit (20) being disposed in the air passage, the air conditioning unit generating the air conditioning wind using air introduced into the air passage from outside the air conditioning duct;
a control unit (80), wherein the control unit (80) controls the air conditioning unit; and
a dust sensor (70) that has a communication passage (700) that communicates the inside of the air conditioning duct with the outside, and that detects the concentration of dust in the air flowing through the communication passage,
the control unit has a control mode in which the air conditioning unit is controlled to remove dust accumulated in the communication path,
the air conditioning unit has air outlet switching doors (26, 27, 28) for switching the open/closed state of the air outlet,
the control unit moves the air outlet switching door to a closed position at which the air outlet is fully closed when the control mode is executed.
15. An air conditioning device for a vehicle according to claim 14,
the air conditioning unit has a blower fan (21) that adjusts the air volume of the air-conditioned air,
the control unit sets the air volume of the blower fan to a maximum air volume when executing the control mode.
16. An air conditioning device for a vehicle according to claim 14,
the air conditioning unit includes:
a heater core (23), the heater core (23) heating air flowing in the air passage; and
an air mix door (25), the air mix door (25) adjusting an air volume of air flowing into the heater core and an air volume of air bypassing the heater core,
the control unit adjusts the position of the air mix door to a maximum heating position at which the air volume of the air flowing into the heater core is maximum when the control mode is executed.
17. An air conditioning device for a vehicle according to claim 14,
the control unit executes the control mode on condition that it is detected that the occupant is not present in the vehicle interior.
18. An air conditioning device for a vehicle according to claim 17,
the control unit determines whether or not an occupant is present in the vehicle compartment based on a seating state of the occupant on a seat of the vehicle.
19. An air conditioning device for a vehicle according to claim 17,
the control portion determines whether an occupant is present in the vehicle compartment based on an open-closed state of a vehicle door.
20. An air conditioning device for a vehicle according to any one of claims 17 to 19,
the control unit executes the control mode after a predetermined time has elapsed from a time point at which it is detected that no occupant is present in the vehicle interior.
21. An air conditioning device for a vehicle according to any one of claims 14 to 16,
the control unit executes the control mode on condition that it is detected that the vehicle is not running.
22. An air conditioning device for a vehicle according to claim 21,
the control unit executes the control mode after a predetermined time has elapsed from a time point at which it is detected that the vehicle is not traveling.
23. An air conditioning device for a vehicle according to any one of claims 14 to 16,
the control portion executes the control mode on condition that an ignition switch of a vehicle is turned off.
24. An air conditioning device for a vehicle according to claim 23,
the control unit executes the control mode after a predetermined time has elapsed from a time point at which the turning-off operation of the ignition switch is detected.
25. An air conditioning device for a vehicle according to any one of claims 14 to 16,
the control unit executes the control pattern at a predetermined cycle.
26. An air conditioning device for a vehicle according to any one of claims 14 to 16,
the control unit executes the control mode on the condition that a vehicle stop operation is performed on a start switch (75) that is operated when the vehicle is started and stopped.
27. An air conditioning device for a vehicle, comprising:
an air-conditioning duct (10) in which an air passage (11) is formed inside the air-conditioning duct (10), the air passage (11) guiding air-conditioning air that conditions the interior of a vehicle interior to the vehicle interior via an air outlet;
an air conditioning unit (20), the air conditioning unit (20) being disposed in the air passage, the air conditioning unit generating the air conditioning wind using air introduced into the air passage from outside the air conditioning duct;
a control unit (80), wherein the control unit (80) controls the air conditioning unit; and
a dust sensor (70) that has a communication passage (700) that communicates the inside of the air conditioning duct with the outside, and that detects the concentration of dust in the air flowing through the communication passage,
the control unit has a control mode in which the air conditioning unit is controlled to remove dust accumulated in the communication path,
the air conditioning unit includes:
a blower fan (21), the blower fan (21) adjusting an air volume of the air-conditioned air;
outlet switching doors (26, 27, 28) that switch the open/closed state of the outlet;
a heater core (23), the heater core (23) heating air flowing in the air passage; and
an air mix door (25), the air mix door (25) adjusting an air volume of air flowing into the heater core and an air volume of air bypassing the heater core,
as the control mode, the control unit performs at least one of the following processes on the condition that the air volume of the blower fan is set to an upper limit set value that can be set in an air conditioning mode in which the air conditioning unit is controlled to generate the conditioned air:
a process of moving the air outlet switching door to a closed position at which the air outlet is fully closed; and
and adjusting the position of the air mix door to a maximum heating position at which the air volume of the air flowing into the heater core is maximized.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015222042 | 2015-11-12 | ||
| JP2015-222042 | 2015-11-12 | ||
| JP2016199989A JP6477652B2 (en) | 2015-11-12 | 2016-10-11 | Air conditioner for vehicles |
| JP2016-199989 | 2016-10-11 | ||
| PCT/JP2016/082005 WO2017082074A1 (en) | 2015-11-12 | 2016-10-28 | Air conditioning device for vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108430814A CN108430814A (en) | 2018-08-21 |
| CN108430814B true CN108430814B (en) | 2021-08-24 |
Family
ID=58816554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680065880.8A Expired - Fee Related CN108430814B (en) | 2015-11-12 | 2016-10-28 | Air conditioner for vehicle |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6477652B2 (en) |
| CN (1) | CN108430814B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019014380A (en) * | 2017-07-07 | 2019-01-31 | 株式会社デンソー | Vehicle air conditioner |
| JP6841187B2 (en) * | 2017-08-23 | 2021-03-10 | 株式会社デンソー | Air conditioning controller |
| JP2019038324A (en) * | 2017-08-23 | 2019-03-14 | 株式会社デンソー | Vehicular air conditioner |
| JP6911819B2 (en) * | 2017-08-25 | 2021-07-28 | 株式会社デンソー | Vehicle air conditioner |
| JP7017136B2 (en) * | 2018-10-24 | 2022-02-08 | 株式会社デンソー | Vehicle dust measuring device |
| JP7188066B2 (en) * | 2018-12-27 | 2022-12-13 | 株式会社デンソー | Dust detector |
| JP7120157B2 (en) * | 2019-05-29 | 2022-08-17 | トヨタ自動車株式会社 | Vehicle temperature controller |
| CN115836206A (en) * | 2021-02-16 | 2023-03-21 | 法雷奥日本株式会社 | Air conditioner for vehicle |
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| CN104648081A (en) * | 2015-02-09 | 2015-05-27 | 浙江吉利控股集团有限公司 | Vehicle air conditioning system and method for removing dust and mold from vehicle air conditioning system |
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| JP3012271B2 (en) * | 1990-03-15 | 2000-02-21 | 松下電工株式会社 | air purifier |
| JP3201636B2 (en) * | 1992-02-25 | 2001-08-27 | 松下電工株式会社 | air purifier |
| JPH06297935A (en) * | 1993-04-13 | 1994-10-25 | Mazda Motor Corp | Gas sensor for vehicle |
| JPH11321289A (en) * | 1998-05-08 | 1999-11-24 | Zexel:Kk | Air conditioning system for motor vehicle |
| US20080092742A1 (en) * | 2004-08-11 | 2008-04-24 | Koninklijke Philips Electronics, N.V. | Air Pollution Sensor System |
| JP4681278B2 (en) * | 2004-11-12 | 2011-05-11 | 株式会社Ｉｈｉシバウラ | Air cleaner |
| JP2007090983A (en) * | 2005-09-28 | 2007-04-12 | Nissan Motor Co Ltd | Inside air and outside air switching device |
| JP2008074365A (en) * | 2006-09-25 | 2008-04-03 | Denso Corp | Vehicular seat air-conditioner |
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- 2016-10-11 JP JP2016199989A patent/JP6477652B2/en not_active Expired - Fee Related
- 2016-10-28 CN CN201680065880.8A patent/CN108430814B/en not_active Expired - Fee Related
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| JPH0939562A (en) * | 1995-07-27 | 1997-02-10 | Kansei Corp | On-vehicle air conditioner |
| CN102305440A (en) * | 2011-09-28 | 2012-01-04 | 曙光信息产业(北京)有限公司 | Dehumidifying and dust-removing method |
| CN104648081A (en) * | 2015-02-09 | 2015-05-27 | 浙江吉利控股集团有限公司 | Vehicle air conditioning system and method for removing dust and mold from vehicle air conditioning system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2017095086A (en) | 2017-06-01 |
| JP6477652B2 (en) | 2019-03-06 |
| CN108430814A (en) | 2018-08-21 |
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