JP2001063347A - Vehicular air-conditioning control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower the power consumption of air conditioners in vehicle travel without degrading the cooling and heating effects of pre-air-conditioning for an occupant riding action. SOLUTION: While a pre-air-conditioning request switch is on, power from an external power source 75 that is charging a secondary battery 73 is used to operate an inverter 46 of a pre-air conditioner 1 so that the vehicle interior is preliminarily cooled or heated during the charging operation. For a given time from the removal of the external power source 75 from the vehicle after the charging operation of the secondary battery 73 to the vehicle driveaway state when the occupant having got into the vehicle starts to drive it, power from the secondary battery 73 is used to continue operating the inverter 46 of the pre-air conditioner 1 so that the vehicle interior is cooled or heated preliminarily even after the disconnection of the external power source 75.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle, such as an electric vehicle, which receives electric power from a secondary battery and drives a traction motor. The present invention relates to a vehicle air-conditioning control system that operates a pre-air-conditioning device to perform pre-air-conditioning for cooling and heating.

[0002]

2. Description of the Related Art Conventionally, in an air conditioning control system for a vehicle that drives a traveling motor by receiving power from a secondary battery (battery) such as an electric vehicle, the air conditioner is also supplied with power from the battery. , It is necessary to reduce the power consumption of the air conditioner while the vehicle is traveling as much as possible in order to extend the traveling distance of the vehicle per charge.

From this viewpoint, recently, pre-air conditioning has been considered in which an air conditioner is operated to preliminarily cool and heat the vehicle interior while the battery is being charged while the operation of the electric vehicle is stopped. For example, Japanese Patent Application Laid-Open No. 7-212902 discloses an air conditioning control system for a vehicle that performs pre-air conditioning by operating a pre-air conditioning device using an excess charging current when charging a battery mounted on a vehicle from an external power supply. It has been disclosed.

[0004]

However, in the vehicle air-conditioning control system for performing the pre-air-conditioning as described above, since the range of use is limited during charging, the charging is completed and the power supply from the external power supply is performed. Is stopped, that is, when the external power supply is removed from the vehicle, the power supply to the pre-air-conditioning device is stopped, so that the pre-air-conditioning is stopped.

Therefore, the pre-air-conditioning system is in a stopped state until the occupant (user) disconnects the external power supply from the vehicle and the occupant gets into the vehicle and enters the vehicle driving state. The air-conditioning effect of the vehicle is lost, and there is a high possibility that the passenger will feel uncomfortable when riding.

[0006] Further, in one of the objects, that is, the reduction of power consumption during running of the vehicle, if the cooling and heating effect of the pre-air conditioning is reduced during riding, the heat load of the vehicle at the beginning of startup in the vehicle operating state is extremely high. Therefore, a large amount of power is consumed by the pre-air conditioning device, and it is difficult to say that the power consumption during traveling of the vehicle by the pre-air conditioning can be reduced.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to reduce the amount of electric power used in an air conditioner while a vehicle is running without impairing the air conditioning effect when the vehicle is riding. It is an object of the present invention to provide a vehicle air-conditioning control system that can perform the control.

[0008]

According to the first aspect of the present invention, when the secondary battery is charged from the external power supply, the pre-air conditioning device is operated by using the power supplied from the external power supply. Perform pre-air conditioning. Then, the pre-air conditioning is performed by continuously operating the pre-air conditioning device using the power supplied from the secondary battery until a predetermined time elapses after the external power is released. This allows
Even if the charging of the secondary battery is completed and the external power supply is removed from the vehicle, the pre-air-conditioning device continues to operate using the power supplied from the secondary battery until a predetermined time has elapsed.

Thus, even if the external power supply is removed from the vehicle and the occupant takes a long time to get into the vehicle, the air conditioning effect of the pre-air conditioning can be maintained for a long time.
It is possible to get on without compromising comfort. In addition, since the air conditioning effect of the pre-air conditioning can be maintained when the occupant gets on the vehicle, the heat load of the vehicle is small at the beginning of the air conditioning startup in the vehicle operating state. For this reason, the power consumption to the air conditioner at the beginning of the air conditioning startup may be small,
Power consumption during running of the vehicle can be reduced.

[0010] According to the second aspect of the present invention, the pre-air-conditioning device is operated by using the surplus charging current at the time of charging the secondary battery from the external power supply, thereby preventing the charging of the secondary battery. In addition, the pre-air-conditioning device can be operated, the charging time of the secondary battery can be reduced, and the pre-air-conditioning effect at the time of boarding can be ensured.

According to the third and fourth aspects of the present invention, when the pre-air-conditioning device is operated, the pre-air-conditioning capability of the pre-air-conditioning device is changed over time. For example, the capacity of the pre-air conditioning system
By gradually or continuously decreasing over time, the amount of power supplied from the secondary battery to the pre-air-conditioning device can be reduced, and the influence on the vehicle mileage can be reduced. .

According to the fifth and sixth aspects of the present invention, it is determined whether or not to activate the pre-air conditioning device based on the state of charge of the secondary battery detected by the state-of-charge detecting means. I have. For example, by operating the pre-air conditioner only when the state of charge of the secondary battery detected by the state-of-charge detection means is good, the pre-air conditioner is operated without hindering charging of the secondary battery. As a result, the charging time of the secondary battery can be shortened, and the pre-air conditioning effect at the time of boarding can be ensured.

According to the seventh and eighth aspects of the invention, the power supplied to the pre-air conditioner is varied based on the state of charge of the secondary battery detected by the state-of-charge detecting means. For example, the better the state of charge of the secondary battery detected by the state-of-charge detecting means, the more the power supplied to the pre-air-conditioning device is increased, so that the charging of the secondary battery is not hindered. The pre-air-conditioning capability of the pre-air-conditioning device can be increased according to the state of charge of the pre-air-conditioning device, and the pre-air-conditioning effect can be improved.

According to the ninth and tenth aspects of the present invention, the pre-air-conditioning capability of the pre-air conditioning device is varied based on the state of charge of the secondary battery detected by the state-of-charge detecting means. . For example, the better the state of charge of the secondary battery detected by the state-of-charge detection means, the more the pre-air-conditioning capability of the pre-air-conditioning device is increased, so that the secondary battery can be charged without obstructing the charging of the secondary battery. The pre-air conditioning capability of the pre-air conditioning device can be increased according to the state of charge of the battery, and the pre-air conditioning effect can be improved.

According to the eleventh aspect of the present invention, when the external power supply is cancelled, immediately after the operation of the pre-air-conditioning device is instantaneously stopped, the pre-air-conditioning device is immediately used by using the power supplied from the secondary battery. By restarting
Even if the external power supply is removed from the vehicle, the pre-air-conditioning device is continuously operated until the predetermined time elapses by receiving power supply from the secondary battery immediately, so that it is possible to get on without damaging comfort.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Configuration of First Embodiment] FIGS. 1 to 4 show a first embodiment of the present invention, and FIG. 1 shows a schematic configuration of an entire air conditioning control system for a vehicle. It is.

The air-conditioning control system for a vehicle according to the present embodiment comprises:
An air conditioner (also referred to as a pre-air conditioner) 1 capable of performing pre-air conditioning for preliminarily cooling and heating the cabin of an electric vehicle
And an air conditioning electronic control unit (hereinafter referred to as an air conditioning EC) for electronically controlling each air conditioning device (actuator) of the air conditioning apparatus 1.
U) 2).

An air conditioner 1 is an automatic air conditioner for an electric vehicle. The air conditioner 1 is an air conditioner duct 3 for sending conditioned air to the vehicle interior of the electric vehicle. Blower 4, air conditioning duct 3
The air conditioner includes an indoor evaporator 5 for cooling air flowing in the inside, and an indoor condenser 6 for heating air flowing in the air conditioning duct 3.

On the upstream side of the air-conditioning duct 3, there are provided an outside air inlet 7 for sucking air (outside air) outside the vehicle compartment and two inside air inlets 8, 9 for sucking air (inside air) inside the vehicle compartment. I have. An inside / outside air switching damper 10 is rotatably attached to an intermediate portion between the inside air suction port 8 and the outside air suction port 7. The inside / outside air switching damper 10 is driven by a servo motor 11 and adjusts a mixing ratio of air taken in from the outside air suction port 7 and the inside air suction ports 8 and 9.

The downstream side of the indoor evaporator 5 in the air conditioning duct 3 is partitioned by a partition plate 12 into two upper and lower ventilation paths 13 and 14. And the lower ventilation path 1
An indoor condenser 6 is arranged in 4, and the upper part of the indoor condenser 6 projects into the upper ventilation path 13. Above the indoor condenser 6, a strong cooling damper 15 is rotatably mounted.
, The amount of air that bypasses the indoor condenser 6 is adjusted.

A communication damper 19 is rotatably attached to a communication port 18 provided in a partition plate 17 on the downstream side of the indoor condenser 6, and the communication damper 19 is driven by a servo motor 20. Partition plate 17
By adjusting the amount of air passing through the communication port 18, the airflow resistance in the single mode (for example, face mode, differential mode) is reduced.

Downstream of the ventilation passage 13, a differential outlet 21 for blowing air toward the inner surface of the windshield and a face outlet 22 for blowing air toward the head and chest of the occupant.
Is provided. A differential damper 23 and a face damper 24 are rotatably attached to the differential outlet 21 and the face outlet 22, respectively. These differential dampers 23 and face dampers 24 are servo motors 25 and 26, respectively.
, Respectively.

A foot outlet 27 for blowing air toward the feet of the occupant is provided downstream of the ventilation passage 14, and a foot damper 28 is rotatably attached to the foot outlet 27. Servo motor 2
9.

The two blowers 4 are rotatably arranged upstream of the air conditioning duct 3 and attached to the output shaft of a blower motor 30. The blower motor 30
1 is driven. The indoor evaporator 5 and the indoor condenser 6 are components of a heat pump. This heat pump has a compressor 32,
Four-way valve 33, outdoor heat exchanger 34, check valves 35, 36, capillary tube 37, pressure reducing valve 38, solenoid valves 39-4
1, the accumulator 42, the indoor evaporator 5, and the indoor condenser 6 are connected by a refrigerant pipe.

The indoor evaporator 5 functions as an evaporator for cooling the air by exchanging heat between the low-temperature refrigerant and the air flowing in the air conditioning duct 3 to evaporate the refrigerant. The indoor condenser 6 functions as a condenser for heating the air by exchanging heat between the high-temperature refrigerant and the air flowing in the air conditioning duct 3 to condense the refrigerant.

The compressor 32 is a refrigerant compressor that compresses a gas refrigerant sucked from a suction port and discharges a high-temperature and high-pressure gas refrigerant from a discharge port. The electric motor 45 for driving the compressor 32 is configured to be driven by the inverter 46. The inverter 46 converts DC power of, for example, 200 V to 300 V supplied from a secondary battery (battery) 73, which is a power supply for driving the vehicle's traveling motor, into AC power, and the rotational frequency of the electric motor 45 is determined by the AC frequency. Control.

The outdoor heat exchanger 34 is mounted outside the air-conditioning duct 3 (for example, in an engine room where the traveling wind is easily received), and exchanges heat between a high-temperature or low-temperature refrigerant and air outside the vehicle compartment to exchange the refrigerant. Is condensed or evaporated. The outdoor heat exchanger 34 has a cooling operation mode, a defrosting operation mode,
Acts as a condenser in the dehumidifying heating operation mode. The outdoor heat exchanger 34 functions as an evaporator in the heating operation mode and the dehumidification operation mode. An outdoor fan 47 for forced cooling is provided in the outdoor heat exchanger 34, and the outdoor fan 47 is attached to an output shaft of a fan motor 48.

The capillary tube 37 is a decompression means for decompressing the refrigerant flowing inside to convert the refrigerant into a gas-liquid two-phase refrigerant. Instead of the capillary tube 37, a pressure reducing means such as an orifice and an expansion valve may be used. Further, the pressure reducing valve 38 is a pressure reducing unit that reduces the pressure of the refrigerant flowing inside to convert the refrigerant into a gas-liquid two-phase refrigerant. Instead of the pressure reducing valve 38, a pressure reducing means such as an orifice and an expansion valve may be used.

The four-way valve 33 and each of the solenoid valves 39 to 41 are
As shown in the following Table 1, the air-conditioning operation mode is changed to the cooling operation mode, the heating operation mode, the defrosting operation mode, by being selectively energized (ON) or de-energized (OFF).
Switch to the dehumidification heating operation mode and the dehumidification operation mode.

[0030]

[Table 1]

As is clear from Table 1, in the cooling operation mode, the four-way valve 33 is switched to the position (on position) indicated by the dotted line in FIG. 1, and all the solenoid valves 39 to 41 are closed. As a result, the refrigerant discharged from the discharge port of the compressor 32 circulates through the check valve 35 → the outdoor heat exchanger 34 → the capillary tube 37 → the indoor evaporator 5 → the accumulator 42 → the suction port of the compressor 32.

Therefore, in the cooling operation mode, the high-temperature gas refrigerant discharged from the discharge port of the compressor 32 radiates heat in the outdoor heat exchanger 34 to be liquefied, and the liquid refrigerant is evaporated by the indoor evaporator 5 to be indoors. The air passing through the evaporator 5 is cooled, and the cabin is cooled.

On the other hand, in the heating operation mode, the four-way valve 33 is switched to the position (off position) indicated by the solid line in FIG. 1, the solenoid valve 39 is opened, and the solenoid valves 40 and 41 are closed. As a result, the refrigerant discharged from the discharge port of the compressor 32 circulates through the path of the indoor condenser 6 → the pressure reducing valve 38 → the check valve 36 → the outdoor heat exchanger 34 → the electromagnetic valve 39 → the accumulator 42 → the suction port of the compressor 32. I do.

Therefore, in the heating operation mode, the high-temperature gaseous refrigerant discharged from the discharge port of the compressor 32 radiates and liquefies in the indoor condenser 6, and the air passing through the indoor condenser 6 is heated by this radiation, and the vehicle interior is heated. Is heated.

In the defrosting operation mode and the dehumidifying operation mode, the four-way valve 33 is switched to the position shown by the solid line in FIG. 1, the solenoid valve 40 is opened, and the solenoid valves 39 and 41 are closed. As a result, the refrigerant discharged from the discharge port of the compressor 32 is supplied to the indoor condenser 6 → the solenoid valve 40 → the check valve 3
6 → the outdoor heat exchanger 34 → the capillary tube 37 → the indoor evaporator 5 → the accumulator 42 → the circulation through the suction port of the compressor 32.

Therefore, in the defrosting operation mode, the high-temperature gas refrigerant discharged from the discharge port of the compressor 32 is
The frost adhering to the surface of the outdoor heat exchanger 34 is removed by being supplied to the outdoor heat exchanger 34 via the indoor condenser 6 and the electromagnetic valve 40.
In addition, in the dehumidifying operation mode, since the indoor condenser 6 and the outdoor heat exchanger 34 both function as condensers, the liquid refrigerant liquefied by both the indoor condenser 6 and the outdoor heat exchanger 34 is supplied to the indoor evaporator 5. Indoor evaporator 5
The interior of the vehicle is dehumidified by the stronger cooling action.

In the dehumidifying and heating operation mode, the four-way valve 33 is switched to the position shown by the solid line in FIG. 1, the solenoid valve 41 is opened, and the solenoid valves 39 and 40 are closed. Accordingly, the refrigerant discharged from the discharge port of the compressor 32 is supplied to the indoor condenser 6 → the pressure reducing valve 38 → the check valve 36 → the outdoor heat exchanger 34 →
Solenoid valve 41 → indoor evaporator 5 → accumulator 4
2 → circulates in the path of the suction port of the compressor 32.

Therefore, in the dehumidifying and heating operation mode, both the indoor condenser 6 and the outdoor heat exchanger 34 work as a condenser, and a part of the liquid refrigerant liquefied in the outdoor heat exchanger 34 is also supplied to the indoor evaporator 5. The interior of the vehicle is dehumidified and heated by the weak cooling effect of the indoor evaporator 5.

Next, an air conditioning ECU for controlling the air conditioner 1
2 will be described in detail with reference to FIGS. Here, FIG. 2 is a diagram illustrating a charging circuit of the secondary battery, and FIG. 3 is a diagram illustrating an air conditioner control panel.

The air-conditioning ECU 2 of this embodiment corresponds to the air-conditioning control means of the present invention, and controls the servo motors 11, 16, 2 based on various input data and control programs.
0, 25, 26, 29, the blower drive circuit 31, the four-way valve 33, and the solenoid valves 39 to of the blower motor 30 of the two blowers 4.
41, a fan motor 48 of the outdoor fan 47 and an inverter 46 of the electric motor 45 of the compressor 32 are controlled. The air-conditioning ECU 2 is mainly configured by a microcomputer, and is supplied with an operating voltage from a battery 49 via an ignition switch 50.

The air-conditioning ECU 2 includes a CPU 51 for comparing input data and performing calculations and the like, a RAM 52 for temporarily storing various data and the like, a ROM 53 for previously storing control programs and the like, and converting analog values to digital values. A / D converter 54, I / O unit 5 serving as an input / output port
5, a crystal oscillator 56 for generating a reference signal of several MHz is provided.

The I / O section 55 of the air-conditioning ECU 2 includes an internal air temperature sensor 57, an external air temperature sensor 58, a solar radiation sensor 59, a post-evaporation temperature sensor 60, a blow-out temperature sensor 61, an intake air temperature sensor 62, a compressor intake pressure. Signal lines such as a sensor 63, a comp suction temperature sensor 64, a comp discharge pressure sensor 65, a comp discharge temperature sensor 66, and an air conditioner control panel 67 provided on an instrument panel of an automobile are connected.

The inside air temperature sensor 57 and the outside air temperature sensor 58
Detects the temperature inside the vehicle compartment (inside air temperature Tr) and the temperature outside the vehicle compartment (outside air temperature Tam), respectively. The solar radiation sensor 59 and the post-evaporation temperature sensor 60 detect the amount of solar radiation Ts in the vehicle compartment and the outlet temperature Te of the indoor evaporator 5, respectively. The outlet temperature sensor 61 and the intake air temperature sensor 62
The outlet temperature of the indoor condenser 6 (hereinafter, the outlet temperature T)
c) and the inlet temperature of the indoor evaporator 5 (hereinafter referred to as the suction temperature Tin).

The compressor suction pressure sensor 63 and the compressor suction temperature sensor 64 detect the suction pressure Pcin (low pressure side = evaporation pressure) of the compressor 32 and the temperature Tcin of the refrigerant sucked into the compressor 32, respectively. The comp suction pressure sensor 63 and the comp suction temperature sensor 64 are attached to a refrigerant pipe connecting the suction port of the compressor 32 and the accumulator 42.

The comp discharge pressure sensor 65 and the comp discharge temperature sensor 66 are attached to a refrigerant pipe connecting the discharge port of the compressor 32 and the four-way valve 33.
The comp discharge pressure sensor 65 and the comp discharge temperature sensor 66 are provided with the discharge pressure Pcd of the compressor 32, respectively.
(High pressure side pressure) and the temperature Tcd of the refrigerant discharged from the compressor 32 are detected.

As shown in FIG. 2, the air conditioner control panel 67 is provided with a warm feeling setting device 68.
The temperature setting device 68 includes a cooling key 68a and a warming key 68.
b, and the occupant's set temperature sensation Ss is manually operated by the occupant.
setting means for setting et. This set feeling Sset
Is an index indicating how much to cool or warm up based on an average temperature of 25 ° C. Above the warm feeling setting device 68, a warm feeling display section 68c in which a plurality of light emitting elements are arranged in a horizontal row is provided.

In addition, an air conditioner control panel 67
Are provided with an air conditioner ON / OFF switch 69, a rear defogger switch 70, a front defroster switch 71, a pre-air conditioning request switch 72, and the like. Among these, the air conditioner ON / OFF switch 69 is a switch for manually switching the start and stop of the heat pump, and switches the operation and stop of the compressor 32.
The pre-air-conditioning request switch 72 is a pre-air-conditioning operation requesting unit that issues a pre-air-conditioning operation request when turned on.

The air-conditioning ECU 2 calculates the required heat quantity QAO necessary for air conditioning in the vehicle compartment, obtains the target blow-off air quantities VAO of the two blowers 4 based on the calculated required heat quantity QAO, and obtains the obtained target blow-off air quantities VAO. Is calculated from the target air temperature TAO, and the air conditioning operation mode is selected based on the target air temperature TAO.

On the other hand, as shown in FIGS. 1 and 3, the secondary battery 73 for supplying electric power to the electric motor for driving the electric vehicle and driving the electric motor for driving the electric motor has a charging circuit 7 as shown in FIGS.
4 through an external power supply 75. The charging circuit 74 is controlled by a charging control circuit 76. During charging, the charging current flowing into the secondary battery 73 is detected by the current sensor 77, and the detection signal is supplied to the charging control circuit 7
6 and the air conditioning ECU 2.

The air conditioning ECU 2 is provided with a secondary battery 73.
When the pre-air-conditioning request switch 72 is turned on at the time of charging the battery, the air-conditioning apparatus 1 is operated by using the electric power (for example, surplus charging current) from the secondary battery 73 or the external power supply 75, so that the vehicle interior is Pre-air conditioning for cooling and heating can be performed.

[Control Method of First Embodiment] Next, the operation of the vehicle air-conditioning control system of the present embodiment will be described with reference to FIGS.
This will be briefly described based on the above. Here, FIG. 4 is a flowchart showing a method of controlling the pre-air conditioning device by the air conditioning ECU when charging the secondary battery.

First, the ignition switch 50 of the vehicle
Is turned off and the vehicle operation is terminated, the determination in step S1 becomes "NO", and the flow proceeds to step S2. Here, it is determined whether or not the pre-air-conditioning request switch 72 is turned on. If the pre-air-conditioning request switch 72 is not turned on, the judgment in step S2 becomes “NO”, and the step S3
Then, the operation of the air conditioner 1 is stopped. For example, by stopping the operation of the inverter 46 of the electric motor 45 of the compressor 32, pre-air conditioning for preliminary air conditioning (cooling, heating, defrosting, dehumidifying heating, dehumidifying, etc.) is not performed.

On the other hand, if the pre-air-conditioning request switch 72 is on, the determination in step S2 is “YE
S ", and proceeds to step S4. Here, it is determined whether or not the secondary battery 73 is being charged. If the secondary battery 73 is not being charged, the determination in step S4 is “NO”, and
Proceeding to step S5, it is determined whether or not the charging plug is attached, that is, whether or not the external power supply 75 for charging the secondary battery 73 is connected. If the charging plug is not attached, the determination in step S5 becomes "NO", and the process proceeds to step S3, in which the pre-air conditioning is not performed by stopping the operation of the air conditioner 1.

On the other hand, if the charging plug is attached, the determination in step S5 is "YES", and the flow advances to step S6. On the other hand, in step S4, the secondary battery 7
If the battery 3 has been charged, the determination in step S4 is "YES", and the process proceeds to step S6.

When the process proceeds to step S6, the pre-air conditioner 1
Is in a standby state, and it is determined whether or not certain conditions as described below are satisfied. Example 1) Whether a certain time has passed since the start of charging the secondary battery 73. Example 2) Whether or not the charging of the secondary battery 72 has been completed. Example 3) Whether the pre-air-conditioning operation request time has come.

Then, after the above-mentioned certain conditions are satisfied, the pre-air-conditioning apparatus 1 is operated by the power supply from the external power supply 75 to preliminarily cool and heat the cabin of the electric vehicle. For example, by operating the inverter 46 of the electric motor 45 of the compressor 32, the interior of the vehicle of the electric vehicle is preliminarily cooled, heated, defrosted, dehumidified, heated or dehumidified. Thereafter, during the operation of the pre-air-conditioning apparatus 1 or after the operation of the pre-air-conditioning apparatus 1 is completed, when the power supply from the external power supply 75 is stopped, that is, when the charging plug is removed from the vehicle (step S7). The process proceeds to step S8.

Then, the power supply source for the pre-air-conditioning apparatus 1 is instantaneously switched from the external power supply 75 to the secondary battery 73, and the pre-air-conditioning apparatus 1 is switched until a predetermined time (for example, 5 minutes) elapses.
To preliminarily cool and heat the cabin of the electric vehicle. For example, by operating the inverter 46 of the electric motor 45 of the compressor 32, the interior of the vehicle of the electric vehicle is preliminarily cooled, heated, defrosted, dehumidified, heated or dehumidified. Note that, when the charging plug is released in step S7, step S6
Even if the pre-air-conditioning apparatus 1 is in a standby state, the pre-air-conditioning apparatus 1 may be operated until a predetermined time (for example, 5 minutes) elapses in step S8.

[Effects of the First Embodiment] As described above, the air-conditioning control system for a vehicle according to the present embodiment can stop pre-air-conditioning even if the charging plug is released after the charging of the secondary battery 73 is completed. In addition, since the pre-air conditioning using the secondary battery 73 as a power supply source is continuously operated until a certain time has elapsed, when the occupant gets on the vehicle, the preliminary cooling and heating effect by the pre-air conditioning is not impaired, Comfort during riding can be ensured.

That is, in the pre-air conditioning control using the external power supply according to the conventional technology as the power supply source, when the external power supply as the power supply source is removed from the vehicle, the operation of the pre-air conditioning stops at that point. Normally, in a vehicle driven by a secondary battery such as an electric vehicle, after stopping the operation, the secondary battery is charged in preparation for the next traveling of the vehicle, an external power supply is removed from the vehicle before traveling, and then the vehicle is driven. Get on.

Further, the request for pre-air-conditioning while the vehicle is stopped, for example, while the secondary battery 73 is being charged, is made in order to ensure comfort at the time of the next boarding. It is clear that the longer the time between removing the power supply from the vehicle and getting on the vehicle is, the less the effect of pre-air conditioning and preliminary cooling and heating is diminished. From this, it can be said that the time from when the pre-air conditioning is stopped to when the cooling / heating effect is lost is short because the heat load of the electric vehicle is very high, such as midsummer or midwinter.

On the other hand, in this embodiment, regardless of whether the pre-air conditioning is in operation or has ended, if the pre-air conditioning is requested, the external power supply 75 can be removed from the vehicle. Since the pre-air-conditioning apparatus 1 is immediately supplied with power from the secondary battery 73 and continues to operate for a predetermined time (for example, 5 minutes), it is possible to get on without losing comfort.

[Second Embodiment] FIG. 5 shows a second embodiment of the present invention, in which an air conditioning ECU for charging a secondary battery is used.
Is a flowchart showing a control method of the pre-air-conditioning apparatus according to the first embodiment.

In the present embodiment, when the supply of power from the external power supply 75 is stopped during the operation of the pre-air-conditioning apparatus 1 or after the operation of the pre-air-conditioning apparatus 1, the charging plug is disconnected from the vehicle. (Step S
7), proceed to step S9. Here, the state of charge of the secondary battery 73, that is, how much the secondary battery 73 can be charged with respect to the full charge, is detected using the current sensor 77 or the battery voltage sensor (corresponding to the charge state detection means of the present invention). If the state of charge of the secondary battery 73 is not equal to or more than a certain value (for example, 90% or more), the determination in step S9 is “N”.
"O", the process proceeds to step S3, the pre-air-conditioning apparatus 1 is not operated, and preliminary cooling and heating of the vehicle interior are not performed.

On the other hand, when the state of charge of the secondary battery 73 is equal to or more than a certain value (for example, 90% or more), the process proceeds to step S8, and the power supply source to the pre-air conditioner 1 is By switching to the battery 73, the pre-air-conditioning apparatus 1 is operated until a certain time (for example, 5 minutes) elapses,
Preliminary cooling and heating of the cabin. When the charging plug is released in step S7, the pre-air-conditioning
May be in a standby state, the pre-air-conditioning apparatus 1 may be operated until a predetermined time (for example, 5 minutes) elapses in step S8.

Therefore, in this embodiment, the secondary battery 7
The operation of the pre-air-conditioning apparatus 1 is performed by supplying power from the secondary battery 73 only when the state of charge of the battery 3 is equal to or more than a certain value (for example, 90% or more). Pre-air conditioning can be performed in consideration of shortening of the distance).

[Third Embodiment] FIG. 6 shows a third embodiment of the present invention, in which an air conditioning ECU for charging a secondary battery is used.
Is a flowchart showing a control method of the pre-air-conditioning apparatus according to the first embodiment.

In this embodiment, in the pre-air conditioning (step S8) in which the pre-air conditioning device 1 is operated using the electric power of the secondary battery 73, the pre-air conditioning capability of the pre-air conditioning device 1 is stepwise controlled. That is, in the operation of the pre-air-conditioning apparatus 1 until a predetermined time (for example, 5 minutes) elapses after the power supply from the external power supply 75 is stopped, after a certain time elapses, the pre-air-conditioning apparatus 1 The supply power amount (input power) is gradually reduced with the passage of time, and finally, the capacity stage control is performed in which the power is stopped after a certain period of time (for example, 5 minutes) elapses.

The method of reducing the input power from the secondary battery 73 to the pre-air conditioner 1 may be either a linear control as shown in FIG. 6 or a control in which the power is gradually reduced. By this capacity stage control, the amount of power supplied from the secondary battery 73 to the pre-air conditioner 1 can be reduced,
The influence in the vehicle running state (for example, shortening of the vehicle running distance) can be reduced.

[Fourth Embodiment] FIGS. 7 and 8 show a fourth embodiment of the present invention. FIG. 7 shows a method of controlling a pre-air-conditioning system by an air-conditioning ECU when charging a secondary battery. FIG.

Here, when charging the secondary battery 73, as shown in FIG. 8, in the initial stage of charging, the secondary battery 73 is charged with the maximum charging capacity (maximum charging current = Imax) of the charging circuit 74, and thereafter, the secondary battery 73 is charged. When the charging voltage of the battery 73 (hereinafter referred to as battery voltage) reaches the rated voltage (Vmax), constant voltage charging is performed in which the charging current is saved and charged so that the battery voltage does not exceed the rated voltage (Vmax).

Thereafter, when the charging current gradually decreases and reaches a minimum current value (Imin), thereafter, the constant current charging is performed at the minimum current value (Imin) until the charging is completed. In this case, the battery voltage becomes the rated voltage (Vm
ax), to save and charge the charging current, even if the current in the hatched portion (excess charging current) in FIG.
Does not hinder the charging of the secondary battery 73 from the battery.

Therefore, in this embodiment, the external power supply 7
In the pre-air conditioning (step S6) performed during charging of the secondary battery 73 from No. 5, the operating condition of the pre-air conditioning is added. That is, as described above, when the charging current when charging the secondary battery 73 from the external power supply 75 becomes equal to or less than a predetermined value (Ion as shown in FIG. 8 in this example), the determination in step S10 is “ "YES", the process proceeds to step S6, and the pre-air-conditioning apparatus 1 is operated using the surplus charging current shown in FIG.

If the charging current when charging the secondary battery 73 from the external power supply 75 is not less than the predetermined value (Ion in this example as shown in FIG. 8), the charging current is reduced to the predetermined value (Ion). In the example, as shown in FIG. 8, the pre-air-conditioning apparatus 1 is not operated until it becomes equal to or less than Ion), and a standby state is set.

According to the present embodiment, the pre-air-conditioning device 1 is operated by using the current (excessive charging current) in the hatched portion in FIG. The device 1 can be operated.
Thus, the charging time when charging the secondary battery 73 from the external power supply 75 can be reduced, and the pre-air conditioning effect at the time of riding can be ensured.

The current consumption of the pre-conditioning device 1 may be controlled so that the current consumption of the pre-conditioning device 1 falls within the range of the surplus charging current that does not lower the battery voltage. In this case, the pre-air conditioner 1 can be operated using the surplus charging current. The operation of the pre-air-conditioning device 1 may be stopped when the current consumption of the pre-air-conditioning device 1 exceeds the range of the surplus charging current. In this case, the charging of the secondary battery 73 is not prevented.

[Other Embodiments] In the present embodiment, an example has been described in which the pre-air-conditioning apparatus 1 capable of performing pre-air-conditioning for preliminarily cooling and heating the cabin of an electric vehicle is used.
It is also possible to use a pre-air-conditioning device capable of preliminarily performing only cooling, only heating, only dehumidification, or only air purification in the vehicle cabin.

During pre-air conditioning, the electric motor 45 of the compressor 32 is supplied from the secondary battery 73 or the external power supply 75.
Is not configured to supply power to only the inverter 46 of the other servo motors 11, 1, and 2.
6, 20, 25, 26, 29, and electric devices (actuators) such as the blower drive circuit 31, the four-way valve 33, the solenoid valves 39 to 41, and the fan motor 48 of the outdoor fan 47 of the blower motor 30 of the two blowers 4. , And the power is supplied from the secondary battery 73 or the external power supply 75.

In this embodiment, the operating voltage is supplied from the battery 49 to the air-conditioning ECU 2 via the ignition switch 50. However, the operating voltage is always supplied from the battery 49 and the secondary battery 73 to the air-conditioning ECU 2. You may do it. Further, a secondary battery 73 may be used instead of the battery 49.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a schematic configuration of an entire vehicle air conditioning control system (first embodiment).

FIG. 2 is a circuit diagram showing a charging circuit for a secondary battery (first embodiment).

FIG. 3 is a front view showing an air conditioner control panel (first embodiment).

FIG. 4 is a flowchart showing a method of controlling a pre-air-conditioning device by an air-conditioning ECU when charging a secondary battery (first example).
Embodiment).

FIG. 5 is a flowchart showing a method of controlling the pre-air-conditioning device by the air-conditioning ECU when charging the secondary battery (second example).
Embodiment).

FIG. 6 is a flowchart showing a control method of the pre-air-conditioning device by the air-conditioning ECU when charging the secondary battery (third embodiment).
Embodiment).

FIG. 7 is a flowchart showing a method of controlling the pre-air-conditioning device by the air-conditioning ECU when charging the secondary battery (fourth embodiment);
Embodiment).

FIG. 8 is a charging characteristic diagram showing a change over time in a battery voltage and a charging current when charging a secondary battery (fourth embodiment).

[Explanation of symbols]

 Reference Signs List 1 air conditioner (pre-air conditioner) 2 air conditioning ECU (air conditioning control means) 73 secondary battery 74 charging circuit 75 external power supply 76 charging control circuit 77 current sensor

Claims (11)

[Claims] (A) Pre-air-conditioning for preliminary air-conditioning of a vehicle cabin by receiving power supply from a secondary battery mounted on a vehicle or an external power supply for charging the secondary battery. (B) when charging the secondary battery from the external power supply, operating the pre-air conditioning apparatus using power supplied from the external power supply, and releasing the external power supply. An air-conditioning control system for operating the pre-air-conditioning device using electric power supplied from the secondary battery until a predetermined time elapses. 2. The air conditioning control system for a vehicle according to claim 1, wherein said air conditioning control means operates said pre-air conditioning device by using an excess charging current when charging said secondary battery from said external power supply. An air conditioning control system for a vehicle, wherein 3. The vehicle air-conditioning control system according to claim 1, wherein when the pre-air conditioning device is operated, the capacity of the pre-air conditioning device is changed with time. Characteristic vehicle air conditioning control system. 4. The air conditioning control system for a vehicle according to claim 3, wherein the capacity of the pre-air conditioning device is reduced stepwise or continuously as time passes. 5. The air conditioning control system for a vehicle according to claim 1, wherein said air conditioning control means detects a state of charge of said secondary battery when said external power supply is released. An air-conditioning control system for a vehicle, comprising: a charging state detecting unit, and determining whether to operate the pre-air conditioning device based on a charging state of the secondary battery detected by the charging state detecting unit. . 6. An air conditioning control system for a vehicle according to claim 5, wherein said air conditioning control means controls said pre-air-conditioning device only when the charge state of said secondary battery detected by said charge state detection means is good. An air-conditioning control system for a vehicle, which is operated. 7. The air conditioning control system for a vehicle according to claim 1, wherein said air conditioning control means detects a state of charge of said secondary battery when said external power supply is released. An air-conditioning control system for a vehicle, comprising: a charge state detecting means; and varying power supplied to the pre-air conditioning device based on a charge state of the secondary battery detected by the charge state detecting means. 8. The air conditioning control system for a vehicle according to claim 7, wherein said air conditioning control means sends said pre-air-conditioning device to said pre-air-conditioning device as the charge state of said secondary battery detected by said charge state detection means becomes better. An air conditioning control system for a vehicle, characterized in that the supply power of the vehicle is increased. 9. The vehicle air-conditioning control system according to claim 1, wherein said air-conditioning control means detects a state of charge of said secondary battery when said external power supply is released. An air-conditioning control system for a vehicle, comprising a charge state detecting means, wherein the capacity of the pre-air conditioning device is varied based on a charge state of the secondary battery detected by the charge state detecting means. 10. The air-conditioning control system for a vehicle according to claim 9, wherein the air-conditioning control means is configured such that the better the state of charge of the secondary battery detected by the state-of-charge detection means, the better the pre-air-conditioning device. An air conditioning control system for a vehicle, characterized in that the capacity is increased. 11. The vehicle air conditioning control system according to claim 1, wherein said air conditioning control means stops operation of said pre-air conditioning device instantly when said external power supply is released. An air conditioning control system for a vehicle, characterized in that the pre-air-conditioning device is restarted immediately after using the electric power supplied from the secondary battery.