JP3956684B2 - Air conditioner for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle air conditioner having a function of automatically switching an inside / outside air mode in accordance with a degree of contamination of outside air (air outside the passenger compartment).
[0002]
[Prior art]
Conventionally, in the vehicle air conditioner proposed in Japanese Patent Application Laid-Open No. 57-164807, the degree of contamination of outside air is detected by a gas sensor, and when the degree of contamination of outside air increases, the inside / outside air mode is automatically switched to the inside air mode, The inside air mode is displayed to notify the passenger that the inside air mode has been selected.
[0003]
[Problems to be solved by the invention]
However, in the above conventional apparatus, even if black smoke of exhaust gas rises in front of the eyes, there is a time difference until the exhaust gas is actually detected by the gas sensor and the mode is switched to the inside air mode, and during this time, the outside air mode is displayed. The crew had a sense of incongruity with vision.
[0004]
In view of the above points, the present invention automatically switches the inside / outside air mode according to the degree of outside air pollution, and reduces the dissatisfaction of passengers who dislike the sense of incongruity with vision in the vehicle air conditioner that reports the inside / outside air mode For the purpose.
[0005]
[Means for Solving the Problems]
  In order to achieve the above object, according to the first aspect of the present invention, an air passage (2) through which air is blown into the vehicle interior, and an inside / outside air switching means for switching and introducing the inside air and the outside air into the air passage (2). (6) and detect the degree of outside air pollutionGas sensor(55) and at leastGas sensorControl means (30) for driving the inside / outside air switching means (6) based on the signal of (55) to automatically select and switch between the inside air mode for introducing inside air and the outside air mode for introducing outside air, and control In a vehicle air conditioner comprising mode notification means (60, 61) for notifying the occupant of the inside / outside air mode selected by the means (30), the inside / outside air by the mode notification means (60, 61) operated by the occupant Canceling means for outputting a notification prohibiting signal for prohibiting mode notification (42)An inside air mode setting means (37a) for the passenger to set the inside air mode;The control means (30) prohibits the notification of the inside / outside air mode by the mode notification means (60, 61) when receiving the notification prohibition signal.Furthermore, when the inside air mode setting means (37a) is set by the inside air mode setting means (37a) when the notification of the inside / outside air mode by the mode notifying means (60, 61) is prohibited, the mode is changed to the inside air mode. Notifying means (60, 61) that it is the inside air modeIt is characterized by that.
[0006]
  According to this, if the occupant chooses to prohibit the notification of the inside / outside air mode,Gas sensorThe feeling of discomfort with the occupant's vision due to the detection delay is eliminated, and the flickering of the display in the situation where the inside air mode and the outside air mode are frequently switched is eliminated, which makes it unobtrusive.
  According to the second aspect of the present invention, the canceling means (42) which is operated by the occupant and outputs a notification prohibiting signal for prohibiting the notification of the inside / outside air mode by the mode notifying means (60, 61), and the inside / outside air mode is automatically set. Auto informing means (62) for notifying the occupant that the auto inside / outside air mode is selected and switched automatically, and the control means (30) is a mode informing means (60, 61) when receiving the notice prohibition signal. The internal / external air mode is prohibited from being notified, and the automatic informing means (62) is informed of the automatic internal / external air mode.
  According to this, when the passenger chooses to prohibit the notification of the inside / outside air mode, there is no sense of incongruity with the passenger's vision due to the detection delay of the gas sensor, and the display under the situation where the inside air mode and the outside air mode are frequently switched. No flickering, no more obstruction. Furthermore, if the inside / outside air mode is switched when the inside / outside air mode is prohibited, the operating noise of the inside / outside air switching means will be heard, and the passenger will feel uncomfortable, but will inform the user that the mode is the auto inside / outside air mode. Therefore, the passenger can feel uncomfortable.
[0007]
  Claim3The air passage (2) through which air is blown toward the vehicle interior, the inside / outside air switching means (6) for switching and introducing the inside air and the outside air into the air passage (2), and the degree of contamination of the outside air To detectGas sensor(55) and at leastGas sensorControl means (30) for driving the inside / outside air switching means (6) based on the signal of (55) to automatically select and switch between the inside air mode for introducing inside air and the outside air mode for introducing outside air, and control In the vehicle air conditioner comprising mode notification means (60, 61) for notifying the occupant of the inside / outside air mode selected by the means (30), the control means (30) includes:Gas sensorUntil it is determined that (55) is a state in which the degree of contamination of the outside air can be detected, the notification of the inside / outside air mode by the mode notifying means (60, 61) is prohibited.
[0008]
  by the way,Gas sensorNormally, the inside air mode is set until the detected value reaches a reliable accuracy, but in this case, the passenger feels uncomfortable when the inside air mode is set even though the outside air pollution level is low. . In contrast, the claims3According to the invention ofGas sensorSince the inside / outside air mode is not notified until it is determined that the degree of contamination of the outside air can be detected, it is possible to eliminate a sense of incongruity of the occupant.
[0009]
  Claim4In the invention described in (1), the vehicle is provided with an automatic notification means (62) for notifying the occupant that the automatic internal / external air mode is selected and switched, and the control means (30) includes the mode notification means (60 , 61), when the notification of the inside / outside air mode is prohibited, the automatic notifying means (62) is informed of the automatic inside / outside air mode.
[0010]
According to this, when the inside / outside air mode is switched when the notification of the inside / outside air mode is prohibited, the operation sound of the inside / outside air switching means makes the passenger feel uncomfortable. By notifying, it is possible to eliminate a sense of incongruity of the occupant.
[0011]
  Claim5In the invention described in the above, the inside air mode setting means (37a) for setting the inside air mode by the occupant is provided, and the control means (30) prohibits the notification of the inside / outside air mode by the mode notifying means (60, 61). When the inside air mode is set by the inside air mode setting means (37a), the inside air mode is set, and the mode notifying means (60, 61) is notified of the inside air mode.
[0012]
According to this, when the display of the inside / outside air mode is different from the actual state of the inside / outside air mode, it is possible to eliminate the discomfort of the occupant by performing the state transition based on the display.
[0013]
  Claim6In the invention described inThe outside air mode setting means (37b) for setting the outside air mode by the occupant is provided, and the control means (30) until the gas sensor (55) is determined to be able to detect the degree of contamination of the outside air, and the outside air mode. When the outside air mode is set by the setting means (37b), the outside air mode is set.
[0014]
  by the way,Gas sensorUntil the detected value reaches a reliable accuracy until the detected value is warm enough,6InventionAccording toIf the vehicle is unlikely to be in a garage surrounded by the engine when the engine starts, it ’s unlikely that the engine will suddenly inhale exhaust when the engine starts.The crewBy selecting the outside air mode, it is possible to quickly release the odor and moisture in the passenger compartment to the outside of the vehicle.
[0015]
  Claim7In the invention described in the above, a receiver for receiving a GPS signal is provided, and the control means (30) includes:Gas sensorUntil (55) is determined to be a state in which the degree of contamination of the outside air can be detected, and when a GPS signal can be received, the outside air mode is set.
[0016]
  by the way,Gas sensorUntil the detected value reaches a reliable accuracy until the detected value is warm enough,7In this invention, when the GPS signal can be received, it is assumed that the vehicle is outside the garage and the outside air mode is set. Therefore, immediately after the engine is started, the odor and moisture in the passenger compartment can be quickly released outside the vehicle.
[0019]
  In the invention according to claim 8, the air passage (2) through which air is blown toward the vehicle interior, the inside / outside air switching means (6) for switching and introducing the inside air and the outside air into the air passage (2), Detect pollution degreeGas sensor(55) and at leastGas sensorControl means (30) for driving the inside / outside air switching means (6) based on the signal of (55) to automatically select and switch between the inside air mode for introducing inside air and the outside air mode for introducing outside air, and control A program for controlling the operation of a vehicle air conditioner comprising mode notification means (60, 61) for notifying an occupant of the inside / outside air mode selected by the means (30), the computer (31) of the control means (30) )Gas sensorUntil (55) is determined to be a state in which the degree of contamination of the outside air can be detected, a procedure for prohibiting the notification of the inside / outside air mode by the notification means is executed.
[0020]
  Claim 8 claims3And claims.3It is possible to control the operation of the vehicle air conditioner that achieves the above effects.
[0021]
In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
FIG. 1 shows a schematic configuration of the entire vehicle air conditioner. The vehicle air conditioner 1 has a case 2 that constitutes an air passage through which air is blown toward the vehicle interior. The inside / outside air switching box 5 having the inside air introduction port 3 and the outside air introduction port 4 is arranged at the most upstream part. Inside / outside air switching box 5, an inside / outside air switching door 6 as inside / outside air switching means is rotatably arranged.
[0023]
The inside / outside air switching door 6 is driven by a servo motor 7, and an inside air mode for introducing inside air (vehicle compartment air) from the inside air introduction port 3 and an outside air mode for introducing outside air (vehicle compartment outside air) from the outside air introduction port 4. And switch.
[0024]
On the downstream side of the inside / outside air switching box 5, an electric blower 8 that generates an air flow toward the vehicle interior is disposed. The blower 8 drives the blower fan 8a by a motor 8b. An evaporator 9 that cools the air flowing in the case 2 is disposed on the downstream side of the blower 8. The evaporator 9 is a cooling heat exchanger that cools the air blown from the blower 8 and is one of the elements constituting the refrigeration cycle 10.
[0025]
The refrigeration cycle 10 is a well-known one formed so that the refrigerant circulates from the compressor 11 to the evaporator 9 via the condenser 12, the receiver 13, and the expansion valve 14. The compressor 11 is rotationally driven by the rotational power of a vehicle engine (not shown) being transmitted through an electromagnetic clutch 11a.
[0026]
A heater core 15 for heating the air flowing in the case 2 is disposed on the downstream side of the evaporator 9. The heater core 15 is a heating heat exchanger that heats air (cold air) after passing through the evaporator 9 by using cooling water (hereinafter referred to as hot water) of a vehicle engine as a heat source. A bypass passage 16 through which the gas flows is formed.
[0027]
An air mix door 17 is rotatably disposed between the evaporator 9 and the heater core 15. The air mix door 17 is driven by a servo motor 18 so that its rotational position (opening) can be continuously adjusted. The amount of air passing through the heater core 15 (warm air amount) and the amount of air passing through the bypass passage 16 and bypassing the heater core 15 (cold air amount) are adjusted by the opening degree of the air mix door 17 and thereby blown out into the vehicle interior. The temperature of the air is adjusted. Therefore, in this example, the air mix door 17 constitutes temperature adjusting means for the air blown into the vehicle interior.
[0028]
In the most downstream part of the air passage of the case 2, a defroster outlet 19 for blowing conditioned air toward the window glass W of the vehicle, a face outlet 20 for blowing conditioned air toward the upper occupant upper body, and the lower occupant's lower body There are provided three types of air outlets 21, which are foot outlets 21 for blowing conditioned air toward the air.
[0029]
A defroster door 22, a face door 23, and a foot door 24 are rotatably disposed upstream of the air outlets 19 to 21. These defrost door 22, face door 23 and foot door 24 are driven by a common servo motor 25 via a link mechanism (not shown).
[0030]
The control device 30 as a control means includes a CPU 31, a ROM 32, a RAM 33, and the like, and stores a control program for air conditioning control in the passenger compartment in advance in the ROM 32, and based on the control program. Perform various calculations and processing.
[0031]
The servo motors 7, 18, 25, the blower drive circuit 34, the clutch drive circuit 35, and the inside air indicator 60 are connected to the output side of the control device 30, respectively. By controlling the applied voltage of the blower motor 8b by the blower drive circuit 34, the rotational speed (air volume) of the blower motor 8b is controlled. Further, the energization of the electromagnetic clutch 11 a of the compressor 11 is interrupted by the clutch drive circuit 35 to interrupt the operation of the compressor 11.
[0032]
The inside air indicator 60 serves as mode notifying means for notifying the passenger of the inside air mode, and is installed on the instrument panel. The inside air indicator 60 is formed of, for example, a light emitting diode, and is turned on when the inside / outside air switching door 6 is in the inside air mode to notify the occupant that the inside air mode is set.
[0033]
Operation switches 37 to 42 of an air conditioning operation panel 36 provided on an instrument panel (not shown) in front of the driver's seat in the passenger compartment are connected to the input side of the control device 30. Among these operation switches 37 to 42, an inside / outside air switching switch 37 as inside / outside air mode setting means includes an inside air switch 37a as inside air mode setting means for manually setting the inside air mode, and outside air mode setting means for manually setting the outside air mode. And an auto inside / outside air switch 37c as auto inside / outside air mode setting means for automatically setting the inside / outside air mode as will be described later.
[0034]
The temperature setting switch 38 outputs a signal of the set temperature in the passenger compartment, and the blowing mode switch 39 is a signal for manually setting the face mode, the bi-level mode, the foot mode, the foot defroster mode, and the defroster mode as the blowing mode. The air volume changeover switch 40 outputs a signal for manually setting on / off of the blower 8 and airflow change of the blower 8, and the air conditioner switch 41 outputs an on / off signal of energization of the electromagnetic clutch 11a to compress the air. The operation of the machine 11 is interrupted.
[0035]
The cancel switch 42 serving as a canceling unit is operated by an occupant and outputs a notification prohibiting signal for prohibiting notification of the inside air mode by the inside air indicator 60.
[0036]
An internal air sensor 50, an external air sensor 51, a solar radiation sensor 52, a water temperature sensor 53, an evaporator temperature sensor 54, and a gas sensor 55 are connected to the input side of the control device 30 as sensors for detecting an air conditioning environment condition.
[0037]
The inside air sensor 50 detects the inside air temperature, and generates an inside air temperature signal Tr corresponding to the detected temperature. The outside air sensor 51 detects the outside air temperature and generates an outside air temperature signal Tam corresponding to the detected temperature. The solar radiation sensor 52 detects the amount of solar radiation that has entered the vehicle interior, and generates a solar radiation amount signal Ts corresponding to the detected amount of solar radiation. The water temperature sensor 53 detects the temperature of the hot water circulating in the heater core 15 and generates a water temperature signal Tw corresponding to the detected water temperature. The evaporator temperature sensor 54 detects the temperature of air blown from the evaporator 9 and generates an evaporator temperature signal Te corresponding to the detected temperature.
[0038]
The gas sensor 55 constitutes outside air pollution degree detection means and is installed in the engine room of the vehicle. Specifically, the gas sensor 55 is composed of a semiconductor element whose electrical characteristics change in response to harmful gases such as NOx, CO, and HC of exhaust gas contained in the outside air, and the degree of outside air pollution output from the gas sensor 55. The output value (output voltage value) of the signal Tg increases as the degree of contamination of the outside air increases.
[0039]
Next, the operation of the first embodiment in the above configuration will be described. First, control of the entire air conditioning will be described with reference to the flowchart of FIG.
[0040]
When the ignition switch (not shown) is set to the ignition ON position and the power is turned on, the control device 30 starts the control program, and executes calculation and processing according to the flowchart of FIG.
[0041]
First, in step S1, various timers and control flags are initialized. Next, the set temperature signal Tset is read from the temperature setting switch 38 in step S2. Subsequently, in step S3, input signals (inner temperature signal Tr, outer temperature signal Tam, water temperature signal Tw, solar radiation amount signal) from various sensors 50 to 55 are detected in order to detect the vehicle environmental condition that affects the air conditioning condition in the passenger compartment. Ts, evaporator temperature signal Te, outside air pollution level signal Tg) are read.
[0042]
Next, the target blowing temperature TAO of the air blown into the vehicle interior is calculated based on the following formula 1 in step S4. This target blowout temperature TAO is a target temperature necessary for maintaining the vehicle interior temperature at the set temperature Tset regardless of changes in the vehicle environmental conditions (air conditioning heat load conditions).
[0043]
[Expression 1]
TAO = Kset, Tset-Kr, Tr-Kam, Tam-Ks, Ts + C
However, Kset is a temperature setting gain, Tset is a set temperature signal, Kr is an inside air temperature gain, Tr is an inside air temperature signal, Kam is an outside air temperature gain, Tam is an outside air temperature signal, Ks is a solar radiation gain, Ts is a solar radiation amount signal, C Is a correction constant.
[0044]
Next, the blower voltage BLW applied to the blower motor 8b in step S5 is determined based on the target blowing temperature TAO. Specifically, the blower 8 is in a low temperature range (maximum cooling range) where TAO is lower than the first predetermined temperature, and in a high temperature range (maximum heating range) where TAO is a temperature sufficiently higher than the first predetermined temperature. When the TAO is in an intermediate temperature range between the first predetermined temperature and the second predetermined temperature, the blower voltage BLW is determined so as to decrease the blown amount of the blower 8.
[0045]
Here, since the rotation speed (air flow rate) of the blower 8 is proportional to the motor applied voltage, the air flow rate of the blower 8 can be determined by determining the blower voltage BLW. When the air volume of the blower 8 is manually set by the air volume changeover switch 40 of the air conditioning operation panel 36, the blower voltage BLW corresponding to the manually set air volume is determined.
[0046]
Next, in step S6, the target opening degree SW of the air mix door 17 is calculated by the following formula 2.
[0047]
[Expression 2]
SW = {(TAO-TE) / (TW-TE)} × 100 (%)
SW = 0% is the maximum cooling position (position a in FIG. 1) where the air mix door 17 fully closes the ventilation path of the heater core 15 and fully opens the bypass passage 16, and SW = 100% is air mix. The door 17 is the maximum heating position (the position b in FIG. 1) where the bypass passage 16 is fully closed and the ventilation path of the heater core 15 is fully opened.
[0048]
Next, in step S7, the inside / outside air mode is determined, and the display content of the inside / outside air mode information by the inside air indicator 60 is determined. Details of the determination of the inside / outside air mode and display contents in step S7 will be described later.
[0049]
Next, in step S8, intermittent control of the operation of the compressor 11 of the refrigeration cycle 10 is determined. Specifically, the target temperature TEO of the evaporator temperature is compared with the actual evaporator temperature Te, and when Te is higher than TEO, energization of the electromagnetic clutch 11a of the compressor 11 is turned on to operate the compressor 11. On the other hand, when Te becomes lower than TEO, the electromagnetic clutch 11a is turned off and the operation of the compressor 11 is stopped. By such intermittent control of compressor operation, the actual evaporator temperature Te is maintained at the target temperature TEO.
[0050]
Subsequently, in step S9, the blowing mode of the blowing air into the vehicle compartment is determined based on the target blowing temperature TAO. Specifically, as the target blowing temperature TAO rises from the low temperature side, the blowing mode is automatically and sequentially switched from the face (FACE) mode → the bi-level (B / L) mode → the foot (FOOT) mode.
[0051]
When the blow mode is manually set by the blow mode switch 39 on the air conditioning operation panel 36, the blow mode set manually is determined.
[0052]
Next, in step S10, the control signals determined in the above steps S5 to S9 are output to the actuator motors 7, 18, 25, the blower drive circuit 34, and the clutch drive circuit 35 in FIG. Control the operation of Further, lighting / extinguishing of the inside air indicator 60 is controlled so that the display content determined in step S7 is obtained.
[0053]
Subsequently, after waiting for a predetermined control period τ in step S11, the process returns to step S2.
[0054]
Next, the determination of the inside / outside air mode in step S7 will be described in detail. When the inside air switch 37a of the inside / outside air changeover switch 37 provided in the air conditioning operation panel 36 is operated, the inside air mode is manually set. When the outside air switch 37b of the inside / outside air changeover switch 37 is operated, the outside air mode is manually set.
[0055]
On the other hand, when the auto inside / outside air switch 37c of the inside / outside air changeover switch 37 is operated and the auto inside / outside air mode is set, the above-described target blowout temperature TAO and the outside air pollution degree signal Tg of the gas sensor 55 are used. The selection of the inside air mode and the outside air mode is automatically performed.
[0056]
The determination of the inside / outside air mode based on the target blowing temperature TAO will be described. When the target blowing temperature TAO is equal to or lower than a first predetermined temperature T1 (for example, −20 ° C.), the inside air mode is selected and the target blowing is performed. When the temperature TAOf becomes higher than the second predetermined temperature T2 (T2> T1, T2 = for example, −15 ° C.), the outside air mode is selected. Thus, by selecting the inside air mode in the maximum cooling region where the target blowing temperature TAO is equal to or lower than the predetermined temperature, the cooling heat load is reduced and the vehicle interior temperature is quickly lowered.
[0057]
On the other hand, the determination of the inside / outside air mode based on the outside air pollution degree signal Tg of the gas sensor 55 will be described. When the outside air pollution degree signal Tg is higher than the determination reference value, that is, when the outside air pollution degree is high, the inside air mode is selected and the outside air pollution is performed. When the degree signal Tg is less than the determination reference value, that is, when the outside air pollution degree is low, the outside air mode is selected. Incidentally, the determination reference value is set to a value of a predetermined level at which an occupant senses a bad odor caused by vehicle exhaust gas in the outside air.
[0058]
Here, in the auto inside / outside air mode, when at least one of the inside / outside air mode based on the target blowing temperature TAO and the inside / outside air mode based on the outside air pollution degree signal Tg is the inside air mode, the inside air mode is finally selected. Further, when both the inside / outside air mode based on the target blowing temperature TAO and the inside / outside air mode based on the outside air pollution degree signal Tg are the outside air mode, the outside air mode is selected.
[0059]
Next, determination of the display contents of the inside / outside air mode information in step S7 will be described with reference to the flowcharts of FIGS.
[0060]
3, in step S701, when the cancel switch 42 is operated, a notification prohibiting signal for prohibiting notification of the inside air mode by the inside air indicator 60 is input. In step S702, if the notification prohibition signal is input in step S701, the setting for prohibiting the notification of the inside air mode, that is, the non-display setting of the inside air mode is performed. If the notification prohibition signal is not input, the non-display setting of the inside air mode is canceled to enable notification of the inside air mode.
[0061]
In FIG. 4, in step S711, it is determined whether or not the inside air mode is selected during the auto inside / outside air mode. If the inside air mode is selected, step S711 becomes YES and the process proceeds to step S712.
[0062]
In step S712, it is determined whether or not the non-display setting is set in step S702 in FIG. 3. If the non-display setting is set, step S712 becomes YES, and the process proceeds to step S713. In step S713, the inside air indicator 60 is turned off so that the inside air mode is not displayed.
[0063]
On the other hand, if the non-display setting is not set, step S712 is NO, and the process proceeds to step S714. In step S714, the inside air display 60 is turned on to display the inside air mode.
[0064]
By the way, even if the black smoke of the exhaust gas rises in front of the eyes, there is a time delay until the exhaust gas is actually detected by the gas sensor 55 and the inside air mode is displayed, and the occupant feels uncomfortable with vision. It was. However, according to the present embodiment, when the passenger selects the prohibition of notification of the inside air mode, there is no sense of incongruity with the passenger's vision due to the detection delay of the gas sensor 55, and the inside air mode and the outside air mode are frequently switched. The flickering of the display at the bottom disappears and it is not obstructive.
[0065]
(Second Embodiment)
FIG. 5 shows the second embodiment, in which step S713 in the flowchart of FIG. 4 of the first embodiment is changed to step S721.
[0066]
In FIG. 5, if the inside air mode is selected during the auto inside / outside air mode, step S711 becomes YES, and the process proceeds to step S712. Next, if the non-display setting is not set in step S702 of FIG. 3, step S712 becomes NO, and the process proceeds to step S721.
[0067]
In step S721, until the predetermined time t1 elapses after the ignition is turned on, the inside air indicator 60 (see FIG. 1) is turned off so that the inside air mode is not displayed, and after the ignition is turned on. When the predetermined time t1 has elapsed, the inside air display 60 is turned on to display the inside air mode.
[0068]
The predetermined time t1 corresponds to the time until the gas sensor 55 (see FIG. 1) can accurately detect the degree of contamination of the outside air, and is set to 35 seconds, for example.
[0069]
By the way, the gas sensor 55 is energized when the ignition is turned on to detect the outside air pollution level. However, it takes a certain amount of time for the detected value to reach a reliable accuracy, and the gas sensor 55 is contaminated with the outside air. Until the degree can be accurately detected, the inside air mode is usually selected. In that case, if the inside air mode is displayed even though the degree of outside air pollution is low, the occupant feels uncomfortable.
[0070]
On the other hand, in this embodiment, even if the non-display setting is not set, until the predetermined time t1 elapses after the ignition is turned on, that is, until the gas sensor 55 can accurately detect the degree of contamination of the outside air. During this period, the display of the shy mode is not performed, so that the above-mentioned occupant discomfort can be eliminated.
[0071]
(Third embodiment)
6 and 7 show a third embodiment. An outside air indicator 61 and an auto indicator 62 are added to the vehicle air conditioner 1 (see FIG. 1) of the first embodiment, and FIG. 4 shows the first embodiment. Step S713 in the flowchart is changed to Step S731.
[0072]
In FIG. 6, the outside air indicator 61 constitutes a mode notification means for notifying the occupant of the outside air mode, and is installed on the instrument panel. The outside air indicator 61 is composed of, for example, a light emitting diode, and lights up when the outside air mode is set by the inside / outside air switching door 6 to notify the occupant that the outside air mode is set.
[0073]
Further, the auto indicator 62 constitutes an auto notifying means for notifying an occupant of the auto inside / outside air mode that automatically selects and switches the inside / outside air mode, and is installed on the instrument panel. The auto indicator 62 lights up when the auto inside / outside air mode is set by the auto inside / outside air switch 37c, and informs the occupant that the auto inside / outside air mode is set.
[0074]
In FIG. 7, if the inside air mode is selected during the auto inside / outside air mode, step S711 becomes YES, and the process proceeds to step S712. Next, if the non-display setting is set in step S702 of FIG. 3, step S712 becomes YES, and the process proceeds to step S731.
[0075]
In step S731, the inside air indicator 60 is turned off so that the inside air mode is not displayed, and the auto indicator 62 is turned on to display the auto inside / outside air mode.
[0076]
By the way, if the inside / outside air mode is switched when the inside air mode notification is prohibited, the operating noise of the inside / outside air switching door 6 is heard, so that the passenger feels uncomfortable, but informs that it is the auto inside / outside air mode. Thus, the passenger can feel uncomfortable.
[0077]
In addition, while the non-display setting is set, the outside air mode 61 is not displayed on the outside air indicator 61.
[0078]
(Fourth embodiment)
FIG. 8 shows a fourth embodiment, in which steps S741 to S745 are added to the processing shown in the flowchart of FIG. 4 of the first embodiment.
[0079]
In FIG. 8, if the inside air mode is selected during the auto inside / outside air mode, step S711 becomes YES, and the process proceeds to step S712. Next, if the non-display setting is set in step S702 of FIG. 3, step S712 becomes YES, and the process proceeds to step S713. In step S713, the inside air indicator 60 (see FIG. 1) is turned off so that the inside air mode is not displayed, and the process proceeds to step S741.
[0080]
In step S741, it is determined whether or not the inside air mode is set manually by operating the inside air switch 37a (see FIG. 1). If the inside air mode is set manually, step S741 becomes YES, and the process proceeds to step S742. In step S742, the inside air indicator 60 is turned on to display the inside air mode. Next, the process proceeds to step S743, and in step S743, the inside / outside air switching door 6 is driven to switch to the inside air mode.
[0081]
On the other hand, if step S711 or step S741 is NO, in step S744, the inside / outside air switching door 6 is driven to switch to the outside air mode. If step S712 is NO, the inside air indicator 60 is turned on to display the inside air mode in step S714, and then the inside / outside air switching door 6 is driven to switch to the inside air mode in step S745. Do.
[0082]
According to the present embodiment, when the display of the inside / outside air mode is different from the actual state of the inside / outside air mode, it is possible to eliminate the discomfort of the occupant by performing the state transition based on the display.
[0083]
(Fifth embodiment)
9 and 10 show a fifth embodiment, which is obtained by adding the processing shown in FIGS. 9 and 10 to the first embodiment.
[0084]
In FIG. 9, in step S751, the occupant inputs an internal / external air mode immediately after the ignition is turned on, that is, an initial operation mode immediately after the engine is started. In step S752, the mode input in step S751 is set as the initial operation mode.
[0085]
In FIG. 10, when an ignition ON input is received in step S761, the process proceeds to step S762. In step S762, it is determined whether or not the initial operation mode set in step S751 of FIG.
[0086]
If the outside air mode is set as the initial operation mode, step S762 becomes YES, and the process proceeds to step S763. In step S763, the inside / outside air switching door 6 (see FIG. 1) is driven to switch to the outside air mode for a predetermined time t1 after the ignition is turned on.
[0087]
On the other hand, if the inside air mode is set as the initial operation mode, step S762 becomes NO and the process proceeds to step S764. In step S764, the inside / outside air switching door 6 is driven to switch to the inside air mode for a predetermined time t1 after the ignition is turned on.
[0088]
When the process of step S763 or step S764 is completed, that is, when a predetermined time t1 has elapsed since the ignition was turned on, the same process as in the first embodiment is performed thereafter. The predetermined time t1 corresponds to the time until the gas sensor 55 (see FIG. 1) can accurately detect the degree of contamination of the outside air, and is set to 35 seconds, for example.
[0089]
As described above, the inside air mode is normally selected until the gas sensor 55 can accurately detect the degree of contamination of the outside air. However, if the vehicle is not in the enclosed garage when the engine is started, the exhaust gas is not suddenly sucked when the engine is started.
[0090]
In this embodiment, since the occupant can select the inside / outside air mode immediately after the ignition is turned on, that is, immediately after the engine is started, for example, when the vehicle is parked outdoors, by selecting the outside air mode, Moisture can be quickly discharged outside the vehicle.
[0091]
(Sixth embodiment)
FIG. 11 shows a sixth embodiment in which the processing shown in FIG. 11 is added to the first embodiment.
[0092]
The air conditioner of this embodiment is applied to a vehicle equipped with a navigation device (not shown). The navigation device includes a receiver that receives a GPS signal, and the GPS signal is transmitted to the control device 30 (see FIG. 1). It is designed to be entered.
[0093]
In FIG. 11, if an ignition ON input is received in step S771, the process proceeds to step S772, and in step S772, it is determined whether a GPS signal has been received. Specifically, it is determined whether or not the reception level of the GPS signal is equal to or higher than a predetermined value. If it is equal to or higher than the predetermined value, step S772 becomes YES and the process proceeds to step S773.
[0094]
If the reception level of the GPS signal is greater than or equal to a predetermined value, it is estimated that the vehicle is outdoors. In step S773, the inside / outside air switching door 6 (see FIG. 1) is driven for a predetermined time t1 after the ignition is turned on. Switch to outside air mode.
[0095]
On the other hand, when the reception level of the GPS signal is less than the predetermined value, step S772 becomes NO and the process proceeds to step S774. In step S774, the inside / outside air switching door 6 is driven to switch to the inside air mode for a predetermined time t1 after the ignition is turned on.
[0096]
When the process of step S773 or step S774 ends, that is, when a predetermined time t1 has elapsed since the ignition was turned on, the same process as in the first embodiment is performed thereafter. The predetermined time t1 corresponds to the time until the gas sensor 55 (see FIG. 1) can accurately detect the degree of contamination of the outside air, and is set to 35 seconds, for example.
[0097]
In this embodiment, when the GPS signal can be received, it is assumed that the vehicle is outside and the outside air mode is set. Therefore, immediately after the engine is started, the odor and moisture in the vehicle compartment can be quickly released outside the vehicle.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a vehicle air conditioner according to a first embodiment of the present invention.
FIG. 2 is a flowchart showing an overview of air conditioning control of the first embodiment.
FIG. 3 is a flowchart showing details of a main part of FIG. 2;
4 is a flowchart showing details of a main part of FIG. 2;
FIG. 5 is a flowchart showing a main part of air conditioning control of the second embodiment.
FIG. 6 is an overall configuration diagram of a vehicle air conditioner according to a third embodiment.
FIG. 7 is a flowchart illustrating a main part of air conditioning control according to a third embodiment.
FIG. 8 is a flowchart illustrating a main part of air conditioning control according to a fourth embodiment.
FIG. 9 is a flowchart showing a main part of air-conditioning control according to a fifth embodiment.
FIG. 10 is a flowchart illustrating a main part of air conditioning control according to a fifth embodiment.
FIG. 11 is a flowchart illustrating a main part of air conditioning control according to a sixth embodiment.
[Explanation of symbols]
2 ... air passage, 6 ... inside / outside air switching door as inside / outside air switching means,
30 ... Control device as control means,
42 ... cancel switch as canceling means,
55. Gas sensor as a contamination degree detection means,
60 .. Inside air indicator as mode notification means.

Claims (8)

An air passage (2) through which air is blown toward the passenger compartment;
Inside / outside air switching means (6) for switching and introducing inside air and outside air into the air passage (2);
A gas sensor (55) for detecting the degree of contamination of the outside air by measuring the concentration of harmful gas in the outside air;
Control means (30) for driving the inside / outside air switching means (6) based on at least a signal from the gas sensor (55) to automatically select and switch between an inside air mode for introducing inside air and an outside air mode for introducing outside air. )When,
In a vehicle air conditioner comprising mode notification means (60, 61) for notifying an occupant of the inside / outside air mode selected by the control means (30),
A canceling means (42) that is operated by a passenger to output a notification prohibiting signal for prohibiting notification of the inside / outside air mode by the mode notification means (60, 61) ;
An inside air mode setting means (37a) for setting the inside air mode by the occupant ,
The control means (30) prohibits the notification of the inside / outside air mode by the mode notification means (60, 61) when receiving the notification prohibition signal ,
Furthermore, when the inside air mode is set by the inside air mode setting means (37a) when the notification of the inside / outside air mode by the mode notifying means (60, 61) is prohibited, the inside air mode is set. An air conditioner for a vehicle, characterized in that mode notification means (60, 61) informs that it is in the inside air mode . An air passage (2) through which air is blown toward the passenger compartment;
Inside / outside air switching means (6) for switching and introducing inside air and outside air into the air passage (2);
A gas sensor (55) for detecting the degree of contamination of the outside air by measuring the concentration of harmful gas in the outside air;
Control means (30) for driving the inside / outside air switching means (6) based on at least a signal from the gas sensor (55) to automatically select and switch between an inside air mode for introducing inside air and an outside air mode for introducing outside air. )When,
In a vehicle air conditioner comprising mode notification means (60, 61) for notifying an occupant of the inside / outside air mode selected by the control means (30),
A canceling means (42) that is operated by a passenger to output a notification prohibiting signal for prohibiting notification of the inside / outside air mode by the mode notification means (60, 61) ;
Automatic notification means (62) for notifying an occupant that the automatic internal / external air mode is selected and switched automatically .
The control means (30) prohibits notification of the inside / outside air mode by the mode notifying means (60, 61) when receiving the notification prohibiting signal, and also indicates that the auto notifying means (62) is in the auto inside / outside air mode. vehicle air conditioner, characterized in that to inform the). An air passage (2) through which air is blown toward the passenger compartment;
Inside / outside air switching means (6) for switching and introducing inside air and outside air into the air passage (2);
A gas sensor (55) for detecting the degree of contamination of the outside air by measuring the concentration of harmful gas in the outside air;
Control means (30) for driving the inside / outside air switching means (6) based on at least a signal from the gas sensor (55) to automatically select and switch between an inside air mode for introducing inside air and an outside air mode for introducing outside air. )When,
In a vehicle air conditioner comprising mode notification means (60, 61) for notifying an occupant of the inside / outside air mode selected by the control means (30),
The control means (30) prohibits the notification of the inside / outside air mode by the mode notification means (60, 61) until it is determined that the gas sensor (55) can detect the degree of contamination of the outside air. An air conditioner for a vehicle. Automatic notification means (62) for notifying the occupant that the internal / external air mode is automatically selected and switched,
When the control means (30) prohibits the notification of the inside / outside air mode by the mode notification means (60, 61), the control means (30) informs the auto notification means (62) that the mode is the auto inside / outside air mode. The vehicle air conditioner according to claim 3 , wherein The inside air mode setting means (37a) for the passenger to set the inside air mode is provided,
When the control unit (30) prohibits the notification of the inside / outside air mode by the mode notification unit (60, 61) and the inside air mode is set by the inside air mode setting unit (37a), The vehicle air conditioner according to claim 3 or 4 , wherein the mode notification means (60, 61) is notified that the mode is the inside air mode while the mode is set. An outside air mode setting means (37b) for setting the outside air mode by the occupant;
The control means (30) until the gas sensor (55) is determined to be capable of detecting the degree of contamination of the outside air , and when the outside air mode is set by the outside air mode setting means (37b). The vehicle air conditioner according to claim 3 , wherein the outside air mode is set . A receiver for receiving GPS signals;
The control means (30) is set to the outside air mode until the gas sensor (55) is judged to be in a state in which the degree of contamination of the outside air can be detected and when the GPS signal can be received. The vehicle air conditioner according to claim 3 . An air passage (2) through which air is blown toward the passenger compartment;
Inside / outside air switching means (6) for switching and introducing inside air and outside air into the air passage (2);
A gas sensor (55) for detecting the degree of contamination of the outside air by measuring the concentration of harmful gas in the outside air;
Control means (30) for driving the inside / outside air switching means (6) based on at least a signal from the gas sensor (55) to automatically select and switch between an inside air mode for introducing inside air and an outside air mode for introducing outside air. )When,
A program for controlling the operation of a vehicle air conditioner comprising mode notification means (60, 61) for notifying an occupant of the inside / outside air mode selected by the control means (30),
Procedure for prohibiting the notification of the inside / outside air mode by the notification means until the computer (31) of the control means (30) determines that the gas sensor (55) can detect the degree of contamination of the outside air. A program characterized by causing execution.

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