JP2006151185A - Air-conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air-conditioner for a vehicle having a smaller sized oxygen adding device 50. <P>SOLUTION: The air-conditioner for the vehicle is equipped with an intra-cabin unit 100 and the oxygen adding device 50 to supply oxygen enriched air into the cabin, whereby the oxygen enriched air is supplied into the cabin by the device 50 when outside air is introduced into the cabin by the intra-cabin unit 100 in addition to the inside air, i.e. at the time of conducting the "partial outside air mode", "half inside air mode". Accordingly from outside the cabin the oxygen is introduced into the cabin in association with introduction of the outside air, and the oxygen concentration in the cabin can be maintained even if the supply quantity of the oxygen enriched air to be supplied into the cabin is decreased from the case where the inside air mode for supplying only the inside air is conducted. That is, the supply quantity of the oxygen enriched air can be decreased while the oxygen concentration in the cabin is maintained. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle air conditioner configured to be switchable between an outside air mode and an inside air mode.

Conventionally, an oxygen addition device for a vehicle that supplies oxygen-enriched air containing more oxygen than the atmosphere into the passenger compartment in order to give a driver a fresh feeling or reduce the fatigue of the passenger. Has been proposed (see, for example, Patent Document 1).
JP-A-4-143118

  However, when the oxygen adding device is actually mounted on the vehicle, the inside air mode is performed and no outside air is introduced. For example, the oxygen amount consumed by the maximum number of passengers (assuming five passenger cars) can be obtained only by the oxygen adding device. In order to cover it, it is necessary to supply a large amount of oxygen-enriched air into the passenger compartment.

  Therefore, as the oxygen addition device, for example, a large device that occupies 1/4 of the trunk room is required. In addition, the power consumption at that time exceeds 100 W, which is not realistic.

  An object of the present invention is to provide a vehicle air conditioner that reduces the supply amount of oxygen-enriched air supplied to the vehicle interior while maintaining the oxygen concentration in the vehicle interior.

In order to achieve the above object, in the invention described in claim 1,
As shown in FIG. 1, air-conditioning means (100, 200) configured to selectively introduce outside air and inside air into the passenger compartment,
Oxygen adding means (50) for supplying oxygen-enriched air containing more oxygen than the atmosphere into the passenger compartment,
When the outside air is introduced into the passenger compartment in addition to the inside air by the air-conditioning means (that is, when the “partial outside air mode” and “semi-inside air mode” in FIGS. 7 and 10 are performed), the oxygen The oxygen enriched air is supplied into the passenger compartment by the additional means.

  According to the first aspect of the present invention, when outside air is introduced into the vehicle interior in addition to the inside air, oxygen is introduced into the vehicle interior from the outside of the vehicle compartment as the outside air is introduced. Therefore, the oxygen concentration in the vehicle interior can be maintained even if the supply amount of the oxygen-enriched air supplied into the vehicle interior is reduced as compared with the case where the internal air mode for supplying only the internal air is performed. That is, since the supply amount of oxygen-enriched air can be reduced while maintaining the oxygen concentration in the passenger compartment, the oxygen adding means can be downsized.

For example, as in the invention according to claim 2, in the vehicle air conditioner according to claim 1, an inside / outside air mode in which which of the inside air and the outside air is introduced into the vehicle interior by the air conditioning means is set. Determining means (S4, S10: see FIG. 3);
Control means (S15: refer to FIG. 4) for controlling the air conditioning means so as to automatically execute the determined inside / outside air mode,
In the case where the determining means determines the mode for introducing outside air into the vehicle interior in addition to the inside air as the inside / outside air mode, the oxygen adding means performs oxygen determination when the determined mode is executed by the air conditioning means. You may comprise so that enriched air may be supplied in a vehicle interior.

Specifically, in the invention according to claim 3, as shown in FIG. 1, an outside air gas sensor (44) that detects the concentration of a contaminating component contained in the outside air;
An inside air gas sensor (45) for detecting the concentration of a pollutant component contained in the inside air,
The determining means may determine the inside / outside air mode based on the concentration of the contaminating component detected by the outside air gas sensor and the concentration of the contaminating component detected by the inside air gas sensor.

  However, in the invention according to claim 4, when the concentration of the contaminating component detected by the outside air sensor is not less than a predetermined value and the concentration of the contaminating component detected by the inside air gas sensor is not more than a predetermined value, The introduction of outside air is stopped.

  Specifically, as shown in FIG. 7, when the outside air pollution level is level 5 or more and the inside air pollution level is level 1 or less, the inside air mode is set to stop the introduction of outside air. If this is the case, it is possible to prevent the passenger from feeling uncomfortable due to the contaminant contained in the outside air.

  Further, as in the invention according to claim 5, in the vehicle air conditioner according to claim 3 or 4, when the concentration of the contaminant component detected by the inside air gas sensor is equal to or higher than a predetermined value, the concentration is a predetermined value. The introduction amount of the outside air is increased as compared with the case of less than the above.

  For example, as shown in FIG. 7, when the outside air pollution level is level 2, when the inside air pollution level is level 2 or higher, the amount of outside air introduced is increased compared to the case where the inside air pollution level is level 1 or lower. If it has become like this, since the density | concentration of the contaminant of inside air can be reduced, the discomfort given to a passenger | crew can be reduced.

  As in the sixth aspect of the present invention, when the amount of outside air introduced into the vehicle interior is greater than or equal to a predetermined amount, the oxygen concentration in the vehicle interior is maintained at a certain level or more by ventilation alone. It is not necessary to supply oxygen-enriched air into the vehicle interior by means. Therefore, by stopping the supply of the oxygen-enriched air by the oxygen addition means, it is possible to prevent the oxygen addition means from operating wastefully, and consequently, wasteful power consumption can be reduced.

  By the way, in the mode in which the outside air introduction port and the inside air introduction port are respectively opened, if the vehicle speed increases, the outside air introduced from the outside air introduction port is caused to enter the vehicle interior through the inside air introduction port due to the influence of the ram pressure. Leakage phenomenon that leaks may occur.

On the other hand, in the invention according to claim 7, the air conditioning means is provided with an outside air introduction port (11b) for introducing the outside air and an inside air introduction port (11a) for introducing the inside air,
The air-conditioning means is configured to be able to implement a semi-inside air mode that opens each of the inside air inlet and the outside air inlet,
Vehicle speed information acquisition means (S5) for acquiring vehicle speed information;
Vehicle speed information acquired by the vehicle speed information acquisition means as to whether or not a leakage phenomenon occurs in which the outside air flows backward through the inside air inlet and leaks into the vehicle interior when the semi-inside air mode is implemented by the air conditioning means. Leakage determination means (S8) for determination based on
The determining means determines, as the inside / outside air mode, a mode for introducing air into the vehicle interior so as to avoid the leakage phenomenon when the leakage determination means determines that the leakage phenomenon occurs.

  Therefore, if the inside / outside air mode is determined and implemented to avoid the leakage phenomenon, it is possible to prevent the passenger from feeling uncomfortable due to the leakage of outside air.

  However, when the fan (13) that sucks the outside air from the outside air inlet and the inside air from the inside air inlet is adopted in the vehicle air conditioner, the leakage phenomenon is also affected by the rotational speed (fan speed) of the fan. Therefore, when performing the leak determination, both the vehicle speed information and the rotation speed of the fan may be used.

  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.

  Below, 1st Embodiment of the vehicle air conditioner which concerns on this invention is described based on FIGS. FIG. 1 shows the overall system configuration of this embodiment.

  The air conditioning indoor unit 100 of the vehicle air conditioner is mounted inside a vehicle interior instrument panel (not shown), and a blower unit 200 is disposed on the most upstream side of the air flow in the air conditioning indoor unit 100.

  The blower unit 200 includes a blower casing 320 having a blower casing body 11 and an outside air introduction duct 300. The blower casing body 11 includes an outside air introduction port 11a and an inside air introduction port 11b. The outside air introduction port 11 a of the blower casing body 11 is connected to the outside air introduction duct 300.

  The outside air introduction duct 300 communicates between the outside air inlet 40 provided in the cowl panel of the vehicle and the outside air introduction port 11a of the blower casing body 11. And the outside air introduction duct 300 introduces the outside air taken in through the outside air inlet 40 of the vehicle into the blower casing body 11 through the outside air inlet 11a.

  On the other hand, an inside / outside air switching door 12 is rotatably installed in the blower casing body 11. The inside / outside air switching door 12 is driven by an actuator 12a to selectively open and close the outside air introduction port 11a and the inside air introduction port 11b. Thus, various inside / outside air suction modes (inside air mode, semi-inside air mode, and outside air mode) are set. The inside / outside air suction mode is a mode for setting which of the inside air and the outside air is introduced into the vehicle interior by the blower unit 200.

  The blower 13 draws air into the blower casing main body 11 from one of the outside air introduction port 11a and the inside air introduction port 11b and blows it to the downstream side of the air conditioning indoor unit 100. The blower 13 has a blower motor 14 and a centrifugal blower fan 15 connected to the rotating shaft thereof. An evaporator 16 and a heater core 17 are provided downstream of the blower fan 15.

  Here, a filter 70 is provided on the air upstream side of the blower fan 15 in the blower casing body 11, and the filter 70 purifies the air introduced from the outside air introduction port 11a and the inside air introduction port 11b.

  The evaporator 16 is a heat exchanger for cooling, and is combined with a compressor or the like driven by a vehicle engine (not shown) to constitute a refrigeration cycle. The low-pressure refrigerant in the interior absorbs heat from the air and evaporates to form air. Cool down. The heater core 17 is a heat exchanger for heating, and warm water (engine cooling water) from a vehicle engine (not shown) circulates inside, and heats the air using the warm water as a heat source.

  On the upstream side of the heater core 17, an air mix door 18 as a blown air temperature adjusting means is rotatably provided, and the opening degree of the air mix door 18 is adjusted by being driven by an actuator 18a. As a result, the air volume ratio between the air passing through the heater core 17 (hot air) and the air bypassing the heater core 17 (cold air) is adjusted, and the temperature of the air blown into the vehicle interior is adjusted.

  A defroster door 20 that opens and closes the defroster air outlet 19, a face door 22 that opens and closes the face air outlet 21, and a foot door 24 that opens and closes the foot air outlet 23 are provided on the most downstream side of the air conditioning indoor unit 100.

  Each of these doors 20, 22 and 24 constitutes a blow mode switching means, and is driven by an actuator 25 to open and close the blow outlets 19, 21 and 23. Thereby, various blowing modes (face mode, bi-level mode, foot mode, foot differential mode, defroster mode, etc.) are set. Then, the temperature-adjusted air is blown out into the passenger compartment from the blowout opening that opens in accordance with each blowout mode.

  Here, the actuator 12a is composed of an electric motor (DC motor) and a potentiometer that detects the rotation angle of its rotating shaft, and the actuators 18a and 25 are also composed of an electric motor and a potentiometer, like the actuator 12a. .

  Further, as shown in FIG. 1, the air conditioner ECU (electronic control unit) 30 includes a microcomputer 31, and the microcomputer 31 adjusts an applied voltage (blower voltage) of the blower motor 14 via a drive circuit 32. Thus, the motor rotation speed (that is, the air flow rate) is controlled. Furthermore, the microcomputer 31 controls the actuators 12 a, 18 a, and 25 independently via the drive circuit 32.

  An operation signal is input to the microcomputer 31 from an air conditioning operation panel 47 installed in the vehicle interior instrument panel. The air conditioning operation panel 47 includes an AUTO switch 47a for setting an automatic control state of the air conditioner, an inside air introduction switch 47b for manually setting the inside air suction mode, and an outside air introduction switch 47c for manually setting the outside air suction mode. In addition to the oxygen addition switch 47d for starting the operation of the oxygen addition apparatus 300 that generates oxygen-enriched air, a blow mode switching switch (not shown) for manually setting the blow mode and the fan speed of the blower fan 15 are set manually. There are provided an air flow rate changeover switch to perform, a temperature setting switch (not shown) for manually setting a desired room temperature (set temperature), and the like.

  Here, the AUTO switch 47a, the inside air introduction switch 47b, the outside air introduction switch 47c, and the oxygen addition switch 47d are provided with indicators 48a to 48d made of light emitting diodes, respectively. The indicators 48a to 48d display the corresponding operating states by turning on and off.

  The microcomputer 31 receives signals from various sensors that detect environmental conditions that affect the air conditioning state of the passenger compartment. Specifically, an inside air sensor 39 that detects an inside air temperature (vehicle interior air temperature) TR, an outside air sensor 40 that detects an outside air temperature (air temperature outside the vehicle interior) TAM, and a solar radiation sensor that detects the amount of solar radiation TS that enters the vehicle interior. 41, each detection signal from the evaporator temperature sensor 42 for detecting the air temperature TE blown from the evaporator 16 and the water temperature sensor 43 for detecting the hot water temperature (engine water temperature) TW circulating through the heater core 17 is sent to the microcomputer 31. Entered.

  Respective detection signals from the exhaust gas sensor 44, the inside air dirt sensor 45, and the like are input to the microcomputer 31 to the microcomputer 31. Specifically, the exhaust gas sensor 44 is a sensor for detecting the degree of pollution of air outside the vehicle, and is a gas sensor that reacts with nitrogen oxides NOx and sulfur oxides SOx. Monitor the degree of contamination (ie, the concentration of contaminants). The inside air dirt sensor 45 is a sensor for detecting the degree of contamination (that is, the concentration of the pollutant) of the inside air (air in the passenger compartment), and for example, an optical sensor that detects cigarette smoke is used.

  The sensors 44 and 45 are generally known sensors, and various detection methods are known. As the exhaust gas sensor 44, a sensor other than a gas sensor that reacts with nitrogen oxides NOx and sulfur oxides SOx may be used as long as it is a sensor that detects the degree of contamination of outside air. Further, as the inside air dirt sensor 45, for example, a sensor of a detection method other than an optical sensor for detecting cigarette smoke may be used as long as it is a sensor for detecting the degree of contamination of inside air.

  Further, the microcomputer 31 and the meter ECU 47 are connected by an in-vehicle LANN, and vehicle speed information is input to the microcomputer 31 from the vehicle speed sensor 46 through the in-vehicle LAN and the meter ECU 47. As the vehicle speed sensor 46, a sensor that detects the rotation speed of the driving wheel of the vehicle as vehicle speed information is used.

  Further, the microcomputer 31 controls the oxygen addition device 50 via the drive circuit 32. Here, the oxygen addition device 50 is a known device that generates oxygen-enriched air that contains more oxygen than the atmosphere, and the schematic configuration of the device will be described with reference to FIG.

  That is, in the oxygen addition device 50, an oxygen-enriched film 51 made so as to transmit oxygen more easily than nitrogen among components in the air is mounted. Via a vacuum pump 53 (specifically, an electric pump). When the vacuum pump 53 starts operating, oxygen-enriched air having a larger oxygen component than the normal atmosphere can be obtained through the oxygen-enriched film 51. Then, the oxygen-enriched air is discharged into the vehicle interior from the 56 outlet port downstream of the vacuum pump 53 through the tube 55. The electric fan 54 is a fan that stirs the atmosphere in the vicinity of the oxygen-enriched film 51, and prevents a large amount of nitrogen from being accumulated in the vicinity of the oxygen-enriched film 51.

  Next, a specific operation of the present embodiment will be described with reference to FIGS. 3 and 4 are flowcharts showing the air conditioning control process of the microcomputer 31 of the air conditioner ECU 30, and the air conditioning control process will be specifically described below with reference to the flowcharts of FIGS.

  First, when the ignition switch IG is turned on, air conditioning control is started. In step S1, initialization processing such as RAM reset is performed. Thereafter, in step S2, the detection value of the exhaust gas sensor 44 is read to detect the degree of contamination of the outside air. Here, as shown in FIG. 5, the outside air pollution level indicating the output of the exhaust gas sensor 44 (that is, the outside air pollution concentration) is divided into five levels. Is decided.

  Here, the outside air pollution level changes in the order of level 1 → level 2 → level 3 → level 4 → level 5 as the detected pollution concentration of the exhaust gas sensor 44 increases.

  Next, in step S3, the detection value of the inside air dirt sensor 45 is read to detect the degree of inside air contamination. Here, as shown in FIG. 6, the inside air contamination level indicating the output (inside air contamination concentration) of the inside air dirt sensor is divided into five levels. It is decided.

  Here, the internal air contamination level changes in the order of level 1 → level 2 → level 3 → level 4 → level 5 as the detected contamination concentration of the internal air contamination sensor 45 increases.

  Next, in step S4, in consideration of the inside air pollution level and the outside air pollution level determined in steps S2 and S3, a temporary basic inside / outside air mode is determined according to the map data in FIG.

  Here, “outside air” refers to an outside air mode in which the inside / outside air switching door 12 completely closes the inside air introduction port 11b and sucks only outside air from the outside air introduction port 11a, and “partial outside air” refers to inside / outside air switching. The outside air introduction port 11a is slightly opened by the door 12 to indicate a partial outside air mode in which a small amount of outside air is sucked in addition to the inside air. The semi-inside air mode is shown in which the outside air inlet 11a and the inside air inlet 11b are equally opened. “Inside air” indicates a mode in which the outside air introduction port 11a is completely closed and only the inside air from the inside air introduction port 11b is sucked.

  According to FIG. 7, for example, when the inside air pollution level is level 1 to level 4, the mode is switched so that the ratio of sucking in the inside air increases as the outside air dirt increases, while the outside air pollution level is level 2. In the case of level 5, the mode is switched so that the ratio of sucking in the outside air increases as the dirt of the inside air increases.

  Next, the reason for using the partial outside air mode and the semi-inside air mode will be described.

  In other words, the partial outside air mode is a mode mainly for the purpose of ventilation in the vehicle interior, and in the state of complete interior air, only a small amount (for example, 30 m 2 / h) of outside air is introduced into the vehicle interior causing a decrease in oxygen and an increase in carbon dioxide. To ventilate. Here, for this amount, for example, a minimum necessary ventilation amount is selected at a level at which sufficient deodorization is possible with the performance of the filter 70 even if odor enters from outside air. Therefore, since the ventilation cannot be completely performed, the decrease in the oxygen concentration cannot be completely suppressed. Therefore, the oxygen-enriched air is supplied into the vehicle interior by the oxygen addition device 50 as in the present embodiment, so that the oxygen in the vehicle interior is increased. Concentration will be improved.

  In the semi-inside air mode, the inside / outside air switching door 12 is positioned at a neutral position between the inside air mode and the outside air mode. However, in reality, when the vehicle speed increases and the ram pressure increases, most of the air that enters the blower casing body 11 is occupied by the outside air, and is almost in the outside air mode. In this state, when the outside air pollution level deteriorates, the inside / outside air switching door 12 is closed in a short period of time so that it can be changed to a partly outside air mode or the like.

  Next, in step S5, vehicle speed information is acquired from the vehicle speed sensor 46 via the meter ECU 47. In step S6, the fan speed (the number of rotations of the fan) of the blower fan 15 is acquired. Specifically, when the automatic air-conditioning control mode is set, data as a fan speed calculated based on a target blowing temperature TAO described later is acquired from the memory, while the manual mode is set. In this case, data as the fan speed is acquired from the air flow rate switch.

  In step S8, the outside air leakage determination is performed from the vehicle speed and the fan speed obtained in steps S5 and S6. Here, the outside air leakage determination will be described. As shown in FIG. 8, normally, in the semi-inside air mode, both the outside air inlet 11a and the inside air inlet 11b are opened equally, but the ram pressure increases as the vehicle speed increases. Thus, the air is pushed from the outside air introduction port 11a side to the inside air introduction port 11b side.

  At this time, if the speed of the blower fan 15 is sufficiently high, the outside air sucked from the outside air introduction port 11a is sucked by the blower fan 15 and is all sent to the air conditioning indoor unit 100. However, if the fan speed is slow, the outside air is sent to the air conditioning indoor unit 100. The air flows back into the vehicle compartment from the inside air inlet 11b. For example, when the outside air temperature is −30 ° C., if such a state (that is, a leakage phenomenon) occurs, the outside air is blown out into the vehicle compartment as cold air from the inside air suction port under the occupant's feet where the blower fan 15 is installed. Will cause discomfort to the passengers. Therefore, it is determined whether or not cold air leakage occurs using the map data shown in FIG.

  In FIG. 9, the vertical axis represents the fan speed (air flow rate) of the blower fan 15, the horizontal axis represents the vehicle speed, and in the semi-inside air mode, cold air (outside air) leaks due to the relationship between the fan speed and the vehicle speed. It is data for determining whether or not.

  Here, when it is determined that cold air leakage has occurred using the map data shown in FIG. 9, the inside / outside air mode is determined again. At this time, the map data of FIG. 10 is used instead of the map data of FIG.

  Here, in the map data of FIG. 10, modes other than the “half-inside air mode” are determined regardless of the level of the outside air pollution level (“outside air” in the figure) and the inside air pollution level (“inside air” in the figure). The For example, in the map data in FIG. 7, the “semi-inside air mode” is determined when the outside air pollution level is level 3 and the inside air pollution level is level 2. However, in the map data in FIG. 3. When the inside air pollution level is level 2, the “outside air mode” is determined.

Next, in step S9, the respective switch input states of the AUTO switch 47a, the inside air introduction switch 47b, and the outside air introduction switch 47c are read, and each of these read switch input states, the above-described provisional basic inside / outside air determination, and Using the cold air leakage determination, the final inside / outside air mode is determined as follows.
(1) If the inside / outside air mode is manually set by the inside air introduction switch 47b, it is assumed that the inside air mode is set in the manual mode, and the final inside / outside air mode is set regardless of the result of the provisional basic inside / outside air determination described above. Determine the shy mode. On the other hand, if the outside air mode is manually set by the outside air introduction switch 47c, it is determined that the outside air mode is set in the manual mode. Determine the mode.
(2) When there is no input to either the inside air introduction switch 47b or the outside air introduction switch 47c and the automatic air conditioning control mode is set by the AUTO switch 47a, when it is determined in step S8 that the cold air leakage phenomenon occurs, The final inside / outside air mode is determined using the map data of FIG.
(3) When there is no input to either the inside air introduction switch 47b or the outside air introduction switch 47c and the automatic air conditioning control mode is set by the AUTO switch 47a, when it is determined in step S8 that the cold air leakage phenomenon does not occur The final inside / outside air mode is determined using the map data shown in FIG.

  When the inside / outside air mode is determined as described above, a control signal indicating the determined inside / outside air mode is output to the actuator 12a. Therefore, the actuator 12a is controlled based on the control signal, and the finally determined inside / outside air mode is determined. Qi mode will be executed automatically.

  Next, the switch input state of the oxygen addition switch 47d is read, and if the oxygen addition switch 47d is in the ON state, YES is determined in step S12, and the process proceeds to step S12.

  If a mode other than “outside air mode” (ie, a mode in which only outside air is completely introduced) (“inside air mode”, “semi-outside air mode”, “partial outside air mode”) is finally determined. NO is determined, the process proceeds to step S13, and the oxygen addition device 50 is operated. For this reason, oxygen-enriched air is blown out from the oxygen addition device 50 into the vehicle interior. Then, it transfers to step S15 and the automatic control of air-conditioning control is started.

  Here, based on the desired blown air temperature, the inside air temperature TR, the outside air temperature TAM, the solar radiation amount TS, etc. set in the temperature setting switch, a known target blowout temperature TAO is calculated, and the calculated target blowout temperature TAO, The air temperature TE is determined based on the hot water temperature (engine water temperature) TW, the voltage applied to the blower motor 14 (the number of rotations of the fan), the blowing mode, and the opening degree of the air mix door 18. Then, the actuators 18a and 25 are automatically and independently controlled based on the determined applied voltage, blowing mode, and opening degree.

  On the other hand, if the oxygen addition switch 47d is in an OFF state, NO is determined in step S11, and the process proceeds to step S14. Even if the oxygen addition switch 47d is in the on state, if the outside air mode is finally determined, the process proceeds to step S14. And in step S14, the oxygen addition apparatus 50 is made into a stop state (off state), it transfers to step S15, and air-conditioning control is started.

  Here, the reason why the oxygen addition device 50 is brought into a stopped state will be described.

  That is, in the outside air mode, only the outside air is completely introduced, so that the vehicle interior is ventilated by the outside air. For this reason, even if the oxygen addition device 50 is operated and oxygen is supplied into the vehicle interior, the oxygen concentration in the vehicle interior cannot be increased by the vehicle interior ventilation, and power for operating the oxygen addition device 50 is wasted. Will be consumed. Therefore, when the outside air mode is determined, the oxygen addition device 50 is stopped.

  Next, the effect of this embodiment is demonstrated.

  That is, the vehicle air conditioner of the present embodiment supplies an air-conditioned indoor unit 100 configured to selectively introduce outside air and inside air into the vehicle interior, and oxygen-enriched air containing more oxygen than the atmosphere into the vehicle interior. An oxygen addition device 50 that performs the “partial outside air mode” and “semi-inside air mode” by the air-conditioning indoor unit 100 and introduces outside air into the vehicle interior in addition to the inside air. The apparatus 50 is characterized in that oxygen-enriched air is supplied into the passenger compartment.

  According to this embodiment, since the air-conditioning indoor unit 100 introduces a predetermined amount of outside air into the vehicle interior in addition to the inside air, oxygen is introduced into the vehicle interior from the outside of the vehicle compartment as the outside air is introduced. Therefore, the oxygen concentration in the vehicle interior can be maintained even if the supply amount of the oxygen-enriched air supplied into the vehicle interior is reduced as compared with the case where the internal air mode for supplying only the internal air is performed. That is, since the supply amount of oxygen-enriched air can be reduced while maintaining the oxygen concentration in the passenger compartment, the oxygen adding device 50 can be downsized.

  However, if the concentration of outside air pollutants (outside air pollution level) is very high, the “partial outside air mode” and “semi-inside air mode” may cause the passenger to feel uncomfortable due to contaminants contained in the outside air. is there. Therefore, if the concentration of the outside air contamination component is very high, the inside air mode is exceptionally set if the concentration of the inside air contamination component (inside air contamination level) is low to some extent.

  Specifically, when the outside air contamination level is level 5 (predetermined value) or more and the inside air pollution level is level 2 (predetermined value) or less, the inside air mode is determined and the introduction of outside air is stopped. If this is the case, there is a possibility that the effect of giving the occupant a fresh feeling or reducing the occupant's fatigue may be obtained, but it is possible to prevent the occupant from feeling uncomfortable due to pollutants contained in the outside air. it can.

  Further, in the present embodiment, for example, when the outside air pollution level is level 3, when the inside air pollution level is 2, the semi-inside air mode is set, whereas when the outside air pollution level is 1, the partially outside air mode is set. The That is, when the inside air pollution concentration is equal to or higher than the predetermined value and “inside air pollution level 2”, the inside air pollution concentration is equal to or lower than the predetermined value and “inside air pollution level 1”, compared with the case where the inside air pollution level is “inside air pollution level 1”. The amount of outside air introduced is increased.

  Therefore, even if the concentration of pollutants in the inside air temporarily increases, by increasing the amount of outside air introduced, the concentration of pollutants in the inside air can be reduced, thereby reducing the uncomfortable feeling given to the passengers. it can.

  Further, when the outside air mode is set, the amount of outside air introduced into the passenger compartment becomes a predetermined amount or more, and the oxygen concentration in the passenger compartment is maintained at a certain level or more only by ventilation. For this reason, it is not necessary to generate oxygen-enriched air by the oxygen addition device 50. Therefore, by stopping the supply of the oxygen-enriched air by the oxygen addition device 50, it is possible to prevent the oxygen addition device 50 from operating wastefully, and consequently, wasteful power consumption can be reduced.

  By the way, when the “half-inside air mode” is performed and the outside air introduction port 11a and the inside air introduction port 11b are opened, when the vehicle speed increases, the outside air introduced from the outside air introduction port due to the influence of the ram pressure. However, a leakage phenomenon may occur in which the air flows backward through the inside air introduction port 11b and leaks into the vehicle interior.

  On the other hand, in the present embodiment, the air conditioner ECU 30 determines whether or not a leakage phenomenon occurs in which outside air flows back through the inside air introduction port 11b and leaks into the vehicle interior when the semi-inside air mode is implemented by the air conditioning indoor unit 100. Is determined based on the vehicle speed and the fan speed, and when it is determined that the leakage phenomenon occurs, the outside air mode is determined as the inside / outside air mode while avoiding the semi-inside air mode. Therefore, it is possible to prevent the passenger from feeling uncomfortable due to the leakage phenomenon.

(Second Embodiment)
In the first embodiment described above, sensors for detecting dirt inside and outside the vehicle interior such as the exhaust gas sensor 44 and the inside air dirt sensor 45 are mounted, and outside air is introduced into the vehicle interior in addition to the inside air according to the detection values of these sensors. Although the partial outside air mode to be introduced is determined, the present invention is not limited to this. For example, as shown in FIG. 11, the following may be applied to a vehicle air conditioner that does not employ these sensors.

  In this case, even when the user selects the inside air mode by the inside air introduction switch 47b, after the inside air mode has been executed for a certain period of time, it is automatically changed to the semi-inside air mode (or partially outside air mode) and partially The outside air is taken in and the oxygenator 50 is operated.

  In this way, after the user switches to the inside air mode, the predetermined time reflects the user's will, and thereafter, the oxygen-enriched air from the oxygenator 50 and the oxygen taken from outside the vehicle compartment by ventilation. Therefore, priority can be given to the increase in the oxygen concentration.

  Also in this embodiment, since a predetermined amount of outside air is introduced into the vehicle interior in addition to the inside air, the supply of oxygen-enriched air supplied to the vehicle interior is greater than when the inside air mode is continuously performed. Even if the amount is reduced, the oxygen concentration in the passenger compartment can be maintained. That is, similarly to the first embodiment described above, the supply amount of oxygen-enriched air can be reduced while maintaining the oxygen concentration in the passenger compartment, and thus the oxygen addition device 50 can be downsized.

(Other embodiments)
In the above-described first and second embodiments, the example in which the opening degree of the inside / outside air switching door 12 is adjusted and the outside air mode in which the outside air is introduced in addition to the inside air has been implemented has been described. You may make it provide external air introduction means, such as opening a part of window glass and introducing external air.

  In the first and second embodiments described above, the example in which the outside air introduction amount for introducing outside air into the vehicle interior does not change regardless of the number of passengers has been described, but the present invention is not limited to this and may be as follows.

  For example, even in the partially outside air mode, the outside air introduction amount for introducing outside air into the passenger compartment may be increased as the number of passengers increases. Therefore, even if the number of passengers increases, an appropriate amount of oxygen concentration corresponding to the number of passengers can be obtained in the passenger compartment, so that it is possible to provide a fresh feeling to the passengers such as the driver and to reduce fatigue. However, it is necessary to employ an occupant detection sensor for detecting the number of occupants in the passenger compartment. As this occupant detection sensor, an infrared sensor that detects the temperature distribution in the passenger compartment for each seat, or a normally open switch that detects the seating of the occupant may be employed.

  Further, when the number of passengers exceeds a predetermined number, the amount of oxygen consumed by the passengers exceeds a certain level, and even if oxygen-enriched air is generated from the oxygen addition device 50, the oxygen concentration can correspond to the number of passengers. In some cases, the effect of giving the occupant a fresh feeling or reducing fatigue may not be obtained. In this case, the generation of oxygen-enriched air from the oxygen addition device 50 is useless and consumes unnecessary power. Therefore, when the number of passengers exceeds a certain number, the oxygen-enriched air from the oxygen addition device 50 is consumed. It is preferable to stop generating.

  In the first embodiment described above, an example is described in which “semi-inside air mode” is adopted as a mode in which the outside air introduction port 11a and the inside air introduction port 11b are equally opened, and outside air leakage determination is performed in this “half-inside air mode”. However, the present invention is not limited to this, and in a mode in which both the outside air introduction port 11a and the inside air introduction port 11b are open, for example, in some outside air modes, there is a possibility that “cold air leakage” may occur depending on the vehicle speed and the fan speed. If there is, the outside air leakage determination may be performed in the partial outside air mode to avoid the “cold air leakage” by avoiding the partial outside air mode.

  Hereinafter, the correspondence relationship between the above embodiment and the structure of the scope of the claims will be described. The air conditioning indoor unit 100 and the blower unit 200 are “air conditioning means configured to selectively introduce outside air and inside air into the vehicle interior”. "When the" partial outside air mode "and" semi-inside air mode "are implemented" corresponds to "when outside air is introduced into the vehicle interior in addition to the inside air by the air-conditioning means", and the oxygenator 50 corresponds to “oxygen adding means for supplying oxygen-enriched air containing more oxygen than the atmosphere into the passenger compartment”, and the control processing of steps S4 and S10 is performed by either “inside air or outside air by the air conditioning means. The exhaust gas sensor 44 corresponds to “an outside air gas sensor for detecting the concentration of contaminating components contained in the outside air”, and corresponds to “a determining means for determining an inside / outside air mode for setting whether to introduce into the vehicle interior”. Sa 45 "to detect the concentration of the contaminant components included in the inside air inside air gas sensor" corresponds to the control processing in step S5 corresponds to "vehicle speed information obtaining means for obtaining vehicle speed information."

It is a mimetic diagram showing the whole system configuration of a 1st embodiment of the air-conditioner for vehicles of the present invention. It is a schematic diagram which shows schematic structure of the oxygen addition apparatus of FIG. It is a flowchart which shows a part of control process of the air-conditioner ECU of FIG. It is a flowchart which shows the remainder of the control processing of the air-conditioner ECU of FIG. It is a figure for demonstrating the level of the detection contamination density | concentration by the exhaust-gas sensor of FIG. It is a figure for demonstrating the level of the contamination density | concentration detected by the inside air dirt sensor of FIG. It is a chart for demonstrating the determination process of the inside / outside air mode by the air-conditioner ECU of FIG. It is a figure for demonstrating the leak phenomenon of cold air in the air-conditioning indoor unit of FIG. It is a figure for demonstrating the relationship between the cold air leakage phenomenon of the air-conditioning indoor unit of FIG. 1, and a vehicle speed. It is a chart for demonstrating the determination process of the inside / outside air mode by the air-conditioner ECU of FIG. It is a schematic diagram which shows the structure of 2nd Embodiment of the vehicle air conditioner of this invention.

Explanation of symbols

13 ... Blower, 50 ... Oxygenator, 100 ... Air-conditioning indoor unit,
11a ... Outside air inlet, 11b ... Inside air inlet, 11 ... Blower casing body,
DESCRIPTION OF SYMBOLS 30 ... Air-conditioner ECU, 44 ... Exhaust gas sensor, 45 ... Inside air pollution sensor 200 ... Blower unit.

Claims (7)

Air-conditioning means (100, 200) configured to selectively introduce outside air and inside air into the vehicle interior;
Oxygen adding means (50) for supplying oxygen-enriched air containing more oxygen than the atmosphere into the passenger compartment,
The vehicle air conditioner is characterized in that oxygen-enriched air is supplied into the vehicle interior by the oxygen addition device when outside air is introduced into the vehicle interior by the air conditioning device. A determination means (S4, S10) for determining an inside / outside air mode for setting which air to be introduced into the vehicle interior, the inside air or the outside air, by the air conditioning means;
Control means (S15) for controlling the air conditioning means so as to automatically carry out the determined inside / outside air mode,
In the case where the determining means determines the mode for introducing outside air into the vehicle interior in addition to the inside air as the inside / outside air mode, the oxygen adding means performs oxygen determination when the determined mode is executed by the air conditioning means. 2. The vehicle air conditioner according to claim 1, wherein the enriched air is supplied into the passenger compartment. An outside air gas sensor (44) for detecting the concentration of contaminants contained in the outside air;
An inside air gas sensor (45) for detecting the concentration of a pollutant component contained in the inside air,
The said determination means determines the said inside / outside air mode based on the density | concentration of the contaminant component detected with the said outside air gas sensor, and the density | concentration of the contamination component detected with the said inside air gas sensor. The vehicle air conditioner described. The introduction of the outside air is stopped when the concentration of the contaminating component detected by the outside air sensor is not less than a predetermined value and the concentration of the contaminating component detected by the inside air gas sensor is not more than a predetermined value. The vehicle air conditioner according to claim 3. The amount of introduction of the outside air is increased when the concentration of the contaminating component detected by the inside air gas sensor is equal to or higher than a predetermined value, compared to the case where the concentration is lower than the predetermined value. The vehicle air conditioner according to 3 or 4. The oxygen-enriched air supply to the vehicle interior by the oxygen adding means is stopped when the amount of outside air introduced into the vehicle interior is a predetermined amount or more. The vehicle air conditioner according to any one of 5. The air conditioning means includes an outside air introduction port (11b) for introducing the outside air and an inside air introduction port (11a) for introducing the inside air,
The air-conditioning means is configured to be able to implement a semi-inside air mode in which each of the inside air introduction port and the outside air introduction port is opened,
Vehicle speed information acquisition means (S5) for acquiring vehicle speed information;
Vehicle speed information acquired by the vehicle speed information acquisition means as to whether or not a leakage phenomenon occurs in which the outside air flows backward through the inside air inlet and leaks into the vehicle interior when the semi-inside air mode is implemented by the air conditioning means. Leakage determination means (S8) for determination based on
The determining means determines, as the inside / outside air mode, a mode for introducing air into the vehicle interior so as to avoid the leakage phenomenon when the leakage determination means determines that the leakage phenomenon occurs. Item 7. The vehicle air conditioner according to any one of Items 1 to 6.

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