JP2004359134A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To sufficiently dry condensed water deposited on an evaporator. <P>SOLUTION: The air conditioner for vehicle is constituted such that a blower fan 1 is arranged at an entrance of an air passage 22 and the evaporator 2 and a heater core 3 are arranged in the air passage 22. A by-pass passage 15 is formed from a downstream of the heater core 3 to an upstream of the blower fan 1 and a by-pass door 8 is provided at an entrance of the by-pass passage 15 of internal/external air selection part 13. In the air conditioner for the vehicle, when air conditioning operation is instructed, the by-pass door 8 is closed and air flow in the by-pass passage 15 is forbidden, and when stopping of the air conditioning operation is instructed, the by-pass door 8 is opened and air is led from the downstream of the heater core 3 to the upstream of the blower fan 1 through the by-pass passage 15 and is circulated in an air conditioning unit 16. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle air conditioner that removes condensed water attached to the surface of an evaporator.
[0002]
[Prior art]
If the air-conditioning operation is started in a state where the condensed water adheres to the surface of the evaporator, the odor generated by the condensed water is released into the passenger compartment, and the occupant feels uncomfortable. In order to eliminate such discomfort, a device that removes condensed water adhering to an evaporator is conventionally known (for example, see Patent Document 1). According to this, when the air conditioning operation is stopped, a passage is formed so that air from the blower fan passes from the downstream side to the upstream side of the evaporator and is discharged to the outside of the vehicle compartment, and condensed water generated in the evaporator is dried.
[0003]
[Patent Document 1]
JP-A-11-129729
[Problems to be solved by the invention]
In the above-described device, when the air conditioning operation is stopped, the air from the blower fan flows from the downstream side to the upstream side of the evaporator without passing through the heater unit. Therefore, the temperature of the air passing through the evaporator is not so high, and it is difficult to sufficiently dry the condensed water.
[0005]
The present invention provides an air conditioner for a vehicle that can sufficiently dry condensed water attached to an evaporator.
[0006]
[Means for Solving the Problems]
The vehicle air conditioner according to the present invention includes a blower that blows air into an air passage in the air conditioning unit, a cooling heat exchanger that cools the air blown into the air passage, and air that has passed through the cooling heat exchanger. A heating heat exchanger for heating the air conditioner, a bypass passage formed from downstream of the heating heat exchanger to upstream of the blower, command means for outputting an air conditioning command based on an air conditioning operation of a passenger, and air conditioning operation by the command means. When instructed, the flow of air in the bypass passage is prohibited, and when the air-conditioning operation is stopped by the command means, the air in the bypass passage is caused to flow from downstream of the heating heat exchanger to upstream of the blower. Flow control means for controlling the flow.
[0007]
【The invention's effect】
According to the present invention, a bypass passage is formed from downstream of the heating heat exchanger to upstream of the blower, and when an air conditioning operation is commanded, the flow of air in the bypass passage is prohibited, and a stop of the air conditioning operation is commanded. And the air flow in the bypass passage is controlled so that the air flows from the downstream of the heating heat exchanger to the upstream of the blower, so that the hot air can be blown to the evaporator after the air conditioning operation is stopped, The condensed water adhering to the can be sufficiently dried.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a vehicle air conditioner according to the present invention will be described with reference to FIGS.
1 to 5 are diagrams showing a schematic configuration of an air conditioning unit 16 of a vehicle air conditioner according to the present embodiment. 1 to 5 show one operation of the present embodiment.
[0009]
The blower fan 1 is disposed at the inlet of the air passage 22, and the air is sucked into the air passage 22 from the inside / outside air selection unit 13 by the rotation of the blower fan 1. In the air passage 22, an evaporator 2 for cooling the air sucked from the blower fan 1, a heater core 3 for heating the cooling air after passing the evaporator, and an air mixing door 4 for distributing the cooling air after passing the evaporator to the heater core 3. Are arranged. The air mix chamber 14 downstream of the heater core communicates with a defrost outlet 17, a vent outlet 18, and a foot outlet 19 via defrost doors 5, vent doors 6, and foot doors 7 (these are referred to as outlet doors 5 to 7), respectively. are doing.
[0010]
The evaporator 2 forms a refrigeration cycle together with a compressor, an expansion valve, and a condenser (not shown), and the evaporator 2 exchanges heat between refrigerant and air to cool the air. Cooling water from an engine (not shown) is guided to the heater core 3, and the heater core 3 exchanges heat between the engine cooling water and air to heat the air. The flow of the engine cooling water to the heater core 3 is controlled by the electric water pump 23 shown in FIG.
[0011]
As a characteristic configuration of the present embodiment, as shown in FIGS. 1 to 5, the air conditioning unit 16 is provided with a bypass passage 15 that connects the air mix chamber 14 and the inside / outside air selection unit 13. A bypass door 8 is provided at the entrance of the bypass passage 15. The bypass door 8 rotates to an open position (FIG. 1) for opening the bypass passage 15, a closed position (FIGS. 3 to 5) for closing the bypass passage, and an intermediate position (FIG. 2) between the open position and the closed position. It is possible.
[0012]
The inside / outside air selection unit 13 has an inside / outside rotatable position between an inside air introduction position (FIGS. 4 and 5) for introducing inside air to the inside / outside air selection unit 13 and an outside air introduction position (FIGS. 1 to 3) for introducing outside air. An air switching door 9 is provided. The introduction port 100 for introducing outside air is divided into an outside air introduction port 11 and an outside air introduction and exhaust port 10 via a dividing wall 10a. The outside air introduction / exhaust port 10 functions as an outside air introduction port when the bypass door 8 is at the open position or the closed position, and functions as an exhaust port when the bypass door 8 is at the intermediate position. The tip of the dividing wall 10a protrudes toward the inside / outside air selection section 13, and the inside / outside air switching door 9 has a substantially rectangular shape corresponding to this.
[0013]
FIG. 7 is a block diagram of a control device according to the present embodiment. The controller 30 is connected to an input unit 31 including various switch groups such as an air conditioner switch and an intake mode changeover switch and various sensor groups for detecting an air-conditioning state. A command and an outside air introduction command are input. The controller 30 executes processing as described later, and controls the operations of the fan motor 1a for driving the blower fan, the electric water pump 23, and the actuators 4a to 9a (motors and the like) for driving the doors 4 to 9, respectively. . The compressor rotates when the air-conditioning operation is commanded, and stops rotating when the air-conditioning operation stops. The blower fan 1, the water pump 23, and the actuators 4a to 9a can be driven by electric power from the battery regardless of the operation / stop of the engine.
[0014]
8 to 10 are flowcharts illustrating an example of the processing executed by the controller 30. This flowchart is started, for example, by turning on an engine key switch, and initially performs an initial control shown in FIG. First, in step S1, a control signal is output to each of the actuators 4a to 9a, and each of the doors 4 to 9 is turned to the position shown in FIG. That is, the air mixing door 4 is turned to the full hot position, the outlet doors 5 to 7 are respectively turned to the closed position, the bypass door 8 is turned to the closed position, and the inside / outside air switching door 9 is turned to the inside air introducing position. Next, in step S2, it is determined whether or not an air conditioning start command has been input from the input unit 31 by turning on the air conditioner switch or the like. When step S2 is affirmed, the process proceeds to step S3, and when denied, the process returns to step S1.
[0015]
In step S3, a drive signal is output to the electric water pump 23 to drive the electric water pump 23. As a result, the engine cooling water is supplied to the heater core 3. Next, in step S4, a control signal is output to each of the actuators 8a and 9a, and as shown in FIG. 2, the bypass door 8 is turned to the intermediate position and the outside air introduction door 9 is turned to the outside air introduction position. Thereby, the outside air introduction / exhaust port 10 and the bypass passage 15, and the outside air introduction port 11 and the upstream of the blower fan 1 communicate with each other. In this case, after the inside / outside air switching door 9 turns so that the inside / outside air switching door 9 and the bypass door 8 do not interfere, the bypass door 8 turns.
[0016]
Next, in step S5, a drive signal is output to the fan motor 1a, and the blower fan 1 is driven at a predetermined rotation speed (for example, high speed). In step S6, the timer is counted, and in the next step S7, it is determined whether the timer has counted a predetermined time t1 (for example, 10 seconds). If step S7 is denied, the process returns to step S6, and if step S7 is affirmed, the process proceeds to step S11 in FIG.
[0017]
In steps S11 to S16, the controller 30 commands a normal air-conditioning operation. In this case, in step S11, a control signal corresponding to an air conditioning command from an input unit (temperature setting switch, outlet switch, etc.) 31 is output to each of the actuators 4a to 7a, and the outlet air temperature and the outlet mode are controlled accordingly. . Further, a control signal is output to the actuator 8a, and the bypass door 8 is turned to the closed position as shown in FIG. 3 or FIG. Next, in step S12, it is determined whether any of the outside air introduction command and the inside air introduction command is output from the input unit 31. When it is determined that the command is the outside air introduction command by turning on the FRE switch or the like, the process proceeds to step S13, in which a control signal is output to the actuator 9a to rotate the inside / outside air switching door 9 to the outside air introduction position. On the other hand, when it is determined that the command is the inside air introduction command by turning on the REC switch or the like, the process proceeds to step S14, in which a control signal is output to the actuator 9a to rotate the inside / outside air switching door 9 to the inside air introduction position.
[0018]
Next, in step S15, a control signal corresponding to an air conditioning command from an input unit (such as a fan switch) 31 is output to the fan motor 1a to control the fan airflow. Next, in step S16, it is determined whether or not an air conditioning stop command has been input from the input unit 31 by turning off the air conditioner switch or the like. If step S16 is denied, the process returns to step S11. If step S16 is affirmed, the process proceeds to step S21 in FIG.
[0019]
In step S21, the output of the drive signal to the electric water pump 23 is stopped, and the drive of the water pump 23 is stopped. Next, in step S22, the output of the drive signal to the fan motor 1a is stopped, and the rotation of the blower fan 1 is stopped. Thereby, the normal air-conditioning operation is temporarily terminated.
[0020]
Next, in step S23, a control signal is output to each of the actuators 4a to 9a, and the doors 4 to 9 are rotated as shown in FIG. That is, the air mix door 4 is turned to the full hot position, the defrost door 5, the vent door 6, and the foot door 7 are respectively turned to the closed position, the bypass door 8 is turned to the open position, and the inside / outside air switching door 9 is turned to the outside air introduction position. Thereby, the bypass passage 15 and the upstream of the blower fan 1 communicate with each other. Next, in step S24, the process waits for a predetermined time (about several seconds) until the state is stabilized, and proceeds to step S25 after the predetermined time. Note that the actual positions of the doors 4 to 9 may be detected, and the process may proceed to step S25 when the door positions are completely switched.
[0021]
In step S25, a drive signal is output to the electric water pump 23 to drive the electric water pump 23. Next, in step S26, a drive signal is output to the fan motor 1a, and the blower fan is driven at a predetermined rotation speed (for example, low speed). In step S27, the timer is counted, and in the next step S28, it is determined whether the timer has counted a predetermined time t2 (for example, 30 seconds). If step S28 is denied, the process returns to step S27, and if affirmative, the process proceeds to step S29.
[0022]
In step S29, a control signal is output to the actuator 8a to rotate the bypass door 8 to the intermediate position as shown in FIG. Next, the timer is counted in step S30, and it is determined in step S31 whether the timer has counted a predetermined time t3 (for example, 10 seconds). If step S31 is denied, the process returns to step S30, and if affirmed, the process proceeds to step S32.
[0023]
In step S32, the output of the driving signal to the electric water pump 23 is stopped, and the driving of the electric water pump 23 is stopped. Next, in step S33, the output of the drive signal to the fan motor 1a is stopped, and the rotation of the blower fan 1 is stopped. Next, in step S34, a control signal is output to each of the actuators 8a and 9a, and as shown in FIG. 5, the bypass door 8 is turned to the closed position, and the inside / outside air switching door 9 is turned to the inside air introduction position, and the process ends. . When an air conditioning start command is input from the input unit 31 in this state, the processing from step S11 is restarted.
[0024]
Next, the operation of the vehicle air conditioner according to the present embodiment will be described more specifically. (1) Before the start of the normal air-conditioning operation After the engine key is turned on and before the air-conditioning start command is input, the doors 4 to 9 rotate as shown in FIG. 5 (step S1). In this state, since the inside / outside air switching door 9 closes the outside air introduction port 10 and the outside air introduction / exhaust port 11 and the doors 5 to 7 close the air outlets 17 to 19, there is no air flow in the air conditioning unit 16. .
[0025]
When an air conditioning start command is input by turning on an air conditioner switch or the like, ventilation operation is started according to a command from the controller 30. In this case, as shown in FIG. 2, the bypass door 8 rotates to the intermediate position, and the inside / outside air switching door 9 rotates to the outside air introduction position (step S4), and the blower fan 1 rotates at a high speed for a predetermined time t1 (step S4). S5). As a result, as shown by the arrow in the drawing, outside air is sucked into the inside / outside air selection unit 13 from the outside air introduction port 11, and after passing through the evaporator 2 and the heater core 3, the outside air enters the bypass passage 15, and the outside air introduction and exhaust port 10 From the passenger compartment. The inside of the air conditioning unit 16 is ventilated by such a flow of air, so that mold, bacteria, odor, and the like remaining in the air passage 22 can be discharged to the outside of the vehicle compartment. Since the blower fan 1 is rotated at a high speed during the ventilation operation, the ventilation operation can be completed in a short time, and the deterioration of the air conditioning of the occupant due to the delay of the blowing of the conditioned air into the passenger compartment does not cause much problem.
[0026]
(2) Normal Air-Conditioning Operation When a predetermined time t1 elapses from the start of the ventilation operation, the normal air-conditioning operation is started by a command from the controller 30. In this case, while the bypass door 8 is closed, the inside / outside air switching door 9, the air mix door 4, and the outlet ports 5 to 7 are respectively turned in response to an air conditioning command from the controller 10, and the blower fan 1 is turned ( Step S11, step S15). At this time, the compressor also rotates. Here, for example, when the outside air introduction mode is commanded, the inside / outside air switching door 9 rotates to the outside air introduction position as shown in FIG. 3 (step S13). Thereby, the outside air introduction / exhaust port 10 functions as an outside air introduction port, and outside air is sucked into the inside / outside air selection unit 13 from the outside air introduction port 10 and the outside air introduction / exhaust port 11 as shown by arrows in the figure. When the inside air introduction mode is commanded, the inside / outside air switching door 9 rotates to the inside air introduction position as shown in FIG. 4 (step S14). Thereby, the inside air is sucked into the inside / outside air selection unit 13 from the inside air introduction port 12 as shown by the arrow in the figure.
[0027]
The outside air or inside air sucked by the blower fan 1 is cooled by exchanging heat with the refrigerant by the evaporator 2. At this time, condensed water adheres to the surface of the evaporator 2. The air cooled by the evaporator 2 passes through or bypasses the heater core 3 at a rate corresponding to the opening of the air mix door 4. The air heated by exchanging heat with the engine cooling water in the heater core 3 and the air bypassing the heater core 3 are mixed in the air mix chamber 14 to generate conditioned air. It is blown into the room. In this case, since the ventilation in the air conditioning unit 16 is performed before the air conditioning operation, the odor in the air conditioning unit 16 is not blown into the vehicle interior, and the occupant's comfort is improved.
[0028]
(3) When the normal air-conditioning operation is stopped When the air-conditioning stop command is input by turning off the air-conditioning switch or the like, the rotation of the electric water pump 23 and the rotation of the blower fan 1 are stopped, respectively, and the normal air-conditioning operation ends (step). S21, step S22). At this time, the operation of the compressor also stops. As shown in FIG. 1, the inside / outside air switching door 9 is turned to the outside air introduction position, the bypass door 8 is turned to the open position, the air mix door 4 is turned to the full hot position, and the outlet doors 5 to 7 are turned to the closed position. (Step S23).
[0029]
Thereafter, when the door position is completely switched, the electric water pump 23 rotates again and sends the engine cooling water to the heater core 3 (step S25). Further, the blower fan 1 rotates at a low speed for a predetermined time t2 (step S26). Thereby, as shown by the arrow in FIG. 1, air is sucked into the air passage 22 from the inside / outside air selection unit 13, and the sucked air passes through the evaporator 2, the heater core 3, and the bypass passage 15, and is sent to the inside / outside air selection unit 13. Return. By the circulation of the air, the air heated by the heater core 3 passes through the evaporator 2, and the condensed water attached to the evaporator 2 can be evaporated and removed. In this case, since there is no request to blow air into the passenger compartment, the occupant does not feel uncomfortable even when the drying operation time t2 is long. If the blower fan 1 is rotated at a high speed, the time t2 can be shortened. Since the electric water pump 23, the blower fan 1, and the doors 4 to 9 can be driven by the electric power from the battery regardless of whether the engine is operating or not, the air-conditioning stop command is similarly input when the engine is stopped. The drying operation in the unit 16 is performed.
[0030]
After the air-conditioning operation is completed, when the air in the air-conditioning unit 16 is circulated for a predetermined time t2, the bypass door 8 is turned to the intermediate position as shown in FIG. 2, and the ventilation operation is performed according to a command from the controller 30 ( Step S29). Thereby, the air introduction / exhaust port 10 functions as an exhaust port, and odors generated when the condensed water is evaporated, bacteria in the air conditioning unit 16 and the like can be discharged to the outside of the vehicle compartment. Note that the blower fan 1 may be rotated at a high speed during the ventilation operation. The ventilation operation is continued for a predetermined time t3, and after the lapse of the predetermined time t3, the electric water pump 23 stops, and the flow of the engine cooling water to the heater core 3 stops (step S32). Further, the rotation of the blower fan 1 is stopped, and as shown in FIG. 5, the bypass door 8 is turned to the closed position, and the inside / outside air switching door 9 is turned to the inside air introduction position (steps S33, S34). This state is maintained until the air conditioning start command is output again.
[0031]
According to the above embodiment, the following operation and effect can be obtained.
(1) When the air-conditioning operation is stopped, the bypass door 8 is opened to connect the inside / outside air selection unit 13 upstream of the blower fan and the air mix chamber 14 downstream of the heater core, and to drive the electric water pump 23 and the blower fan 1. did. Thereby, the warm air that has passed through the heater core 3 is guided to the evaporator 2, and condensed water attached to the evaporator 2 can be sufficiently dried. As a result, it is possible to prevent the growth of mold and bacteria and the generation of odor in the air conditioning unit 16, and when the air from the air conditioning unit 16 is blown into the passenger compartment at the time of starting the air conditioning operation, the mold, bacteria and odor are removed. It can be prevented from being sent into the vehicle interior.
[0032]
(2) After a predetermined time t2 has elapsed from the end of the air-conditioning operation, the bypass door 8 is switched to switch the outside air introduction / exhaust port 10 and the bypass passage 15, and the outside air introduction port 11 and the inside / outside air selection unit 13 upstream of the blower fan, respectively. I tried to communicate. Thereby, the inside of the air conditioning unit 16 can be ventilated, and mold, bacteria, and odor generated in the air conditioning unit 16 can be discharged outside the vehicle compartment.
(3) In the ventilation operation, the bypass door 8 for opening and closing the bypass passage forms a passage from the bypass passage 15 to the outside air introduction / exhaust port 10, so that it is not necessary to separately provide a passage forming member, and the number of parts is reduced. The increase can be suppressed.
(4) Until a predetermined time t1 has elapsed since the output of the air-conditioning start command, that is, at the time of starting the air-conditioning operation, the ventilation into the vehicle interior is prohibited, and the ventilation operation in the air-conditioning unit 16 is performed by switching the bypass door 8. As a result, normal air-conditioning operation is performed after the ventilation in the air-conditioning unit 16, and it is possible to further reduce the invasion of mold and bacteria into the vehicle interior.
(5) Since the blower fan 1 rotates at a high speed during the initial ventilation operation, the ventilation operation can be completed in a short time, and the occupant is less likely to feel uncomfortable due to a delay in the air conditioning operation.
(6) When normal air-conditioning operation is performed in the outside air introduction mode, the outside air is introduced from the outside air inlet 11 and the outside air introduction / exhaust port 10, so that a sufficient air volume can be sucked from outside the vehicle compartment.
(7) Since the introduction port 100 communicating with the outside of the vehicle compartment is divided into the outside air introduction port 11 and the outside air introduction / exhaust port 10 through the dividing wall 10a, the formation of the outside air introduction / exhaust port is easy.
(8) Since the electric water pump 23 is driven during the circulation of the air after the stop of the air conditioning operation, the heating of the air in the heater core 3 is promoted and the condensed water can be sufficiently removed.
[0033]
In the above embodiment, the air-conditioning operation and the ventilation operation are performed by the air-conditioning command from the controller 31 based on the air-conditioning start command and the air-conditioning stop command from the input unit 31, but the configuration of the command means is not limited to this. Absent. For example, the ventilation operation is commanded when the air-conditioning operation is started and after a predetermined time t2 has elapsed after the air-conditioning operation is stopped, but the ventilation operation is commanded either at the start or after the air-conditioning operation is stopped. Is also good.
[0034]
The flow in the bypass passage 15 is controlled by controlling the rotation of the bypass door 8 and the blower fan 1 by a control signal from the controller 30, but the configuration of the flow control means is not limited to this. Although the passage from the bypass passage 15 to the outside air introduction / exhaust port 10 is formed through the bypass door 8, the ventilation means may be formed using a member other than the bypass door 8, that is, a member other than the door member. The inside / outside air switching door 9 switches between the inside air introduction and the outside air introduction, but the configuration as the intake switching means is not limited to this.
[0035]
In the above embodiment, the electric water pump 23 is driven after the air conditioning operation is stopped (step S25). However, the air can be heated by the residual heat of the heater core 3 without driving the electric water pump 23. However, it is not always necessary to drive the electric water pump 23. After the air-conditioning operation is stopped, the air is circulated for the predetermined time t2 (steps S25 to S28). However, the air may be circulated until the detected value of the suction temperature downstream of the evaporator reaches the predetermined value. Although the inlet 100 is divided into the outside air inlet 11 and the outside air introduction / exhaust port 10 through the dividing wall 10a, an outlet is provided separately from the inlet 100, and the inlet 100 is merely used as the outside air inlet. You may make it function. That is, the present invention is not limited to the vehicle air conditioner of the embodiment as long as the features and functions of the present invention can be realized.
[Brief description of the drawings]
FIG. 1 is a diagram showing an example of operation of an air conditioner for a vehicle according to an embodiment of the present invention (when air conditioning operation is stopped).
FIG. 2 is a diagram showing an example of the operation (at the time of ventilation operation) of the vehicle air conditioner according to the embodiment of the present invention.
FIG. 3 is a diagram showing an example of the operation of the vehicle air conditioner according to the embodiment of the present invention (during an outside air introduction operation).
FIG. 4 is a diagram showing an example of the operation of the vehicle air conditioner according to the embodiment of the present invention (at the time of inside air introduction operation).
FIG. 5 is a diagram showing an example of the operation of the vehicle air conditioner according to the embodiment of the present invention (when air conditioning is not being performed).
FIG. 6 is a diagram showing a flow of engine cooling water to a heater core.
FIG. 7 is a block diagram of the vehicle air conditioner according to the embodiment of the present invention.
FIG. 8 is a flowchart (part 1) illustrating an example of processing executed by the controller of FIG. 7;
FIG. 9 is a flowchart (part 2) illustrating an example of processing executed by the controller of FIG. 7;
FIG. 10 is a flowchart (part 3) illustrating an example of processing executed by the controller in FIG. 7;
[Explanation of symbols]
REFERENCE SIGNS LIST 1 blower fan 2 evaporator 3 heater core 8 bypass door 9 inside / outside air switching door 10 outside air introduction and exhaust port 11 outside air introduction port 13 inside / outside air selection unit 15 bypass passage 16 air conditioning unit 22 air passage 30 controller 31 input unit

Claims (5)

A blower that blows air into an air passage in the air conditioning unit;
A cooling heat exchanger for cooling the air blown into the air passage,
A heating heat exchanger that heats the air that has passed through the cooling heat exchanger,
A bypass passage formed from downstream of the heating heat exchanger to upstream of the blower,
Command means for outputting an air-conditioning command based on the air-conditioning operation of the occupant;
When the air-conditioning operation is commanded by the command means, the flow of air in the bypass passage is inhibited, and when the air-conditioning operation is commanded to stop by the command means, from the downstream of the heating heat exchanger to the upstream of the blower. And a flow control means for controlling a flow of air in the bypass passage so that the air flows. The vehicle air conditioner according to claim 1,
Ventilation means for guiding outside air into the air passage from an upstream of the blower through an outside air introduction port and discharging air in the air passage from an exhaust port to the outside of the vehicle through the bypass passage is further provided. Vehicle air conditioner. The vehicle air conditioner according to claim 2,
The flow control means and the ventilation means have a door member rotatable in a passage from the bypass passage to the upstream of the blower and the exhaust port,
When the air-conditioning operation is commanded by the command means, the door member is closed to prohibit the flow of air in the bypass passage, and when the stop of the air-conditioning operation is commanded by the command means, the blower is blown from the bypass passage. A vehicle wherein the door member is opened so that air flows upstream, and the door member is opened so that air flows from the bypass passage to the exhaust port when a ventilation operation is commanded by the command means. Air conditioner. The vehicle air conditioner according to claim 3,
The instructing means instructs the ventilation operation at least at the start of the air conditioning operation or after flowing air from downstream of the heating heat exchanger to upstream of the blower by a stop instruction of the air conditioning operation. Vehicle air conditioner. The vehicle air conditioner according to any one of claims 2 to 4,
When an air conditioning operation for introducing outside air is commanded by the command means, the outside air inlet and the exhaust port communicate with the upstream of the blower, and when an air conditioning operation for introducing inside air is commanded by the command means, the inside air introduction is performed. An air conditioner for a vehicle, comprising: an air intake switching unit that communicates a mouth with an upstream of the blower.

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