JP2002283841A - Air-conditioning system for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air-conditioning system for a vehicle, which does not hamper the traveling of the vehicle by the power consumption at a motor-driven compressor included in the air-conditioning system. SOLUTION: The air-conditioning system comprises the compressor motor of a compressor driven by power supply from a vehicle-installed battery 5, an air-conditioning controller 28 for controlling the operation of the compressor motor, and a current transformer CT1 for detecting a charging current value for the vehicle-installed battery. The air-conditioning controller gradually decreases the drive frequency of the compressor motor when the charging current value becomes lower than a prescribed preset value, according to the charging current value for the vehicle-installed battery, which is detected by the current transformer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioning system used for a vehicle equipped with a power storage means and an electric compressor driven by power supply from the power storage means.

[0002]

2. Description of the Related Art Conventionally, in a car air conditioner (air conditioning system) used for a general automobile, a compressor is driven by a fuel engine (internal combustion engine). The high-temperature gas refrigerant discharged from the compressor and flowing into the outdoor heat exchanger is heat-exchanged with air outside the vehicle compartment by an outdoor blower to radiate heat, is condensed and liquefied, and is provided in the vehicle compartment via an expansion valve. Into the heated indoor heat exchanger. The liquid refrigerant evaporates there and exerts a cooling function by absorbing heat from the surroundings. This indoor heat exchanger exchanges heat with the air in the passenger compartment circulated by the indoor blower, cools the passenger compartment, and performs air conditioning. And the refrigerant | coolant which came out of the indoor heat exchanger repeated the refrigeration cycle returned to a compressor.

[0003] Such a car air conditioner is provided with a control device, and when the interior of the vehicle is cooled to a lower limit temperature between a predetermined upper limit temperature and a lower limit temperature set above and below a set temperature, the control device becomes Turn off the compressor. Then, when the temperature in the vehicle compartment rises and reaches the upper limit temperature, the control device turns on the compressor and restarts the cooling in the vehicle compartment. In this manner, the vehicle interior is cooled and the heating effect from the heater is applied to air-condition the vehicle interior to the set temperature throughout the four seasons.

On the other hand, in recent years, the development of electric vehicles has been activated due to the problem of global environmental pollution due to the exhaust gas from fuel-engine vehicles. In such an electric vehicle, a battery (vehicle-mounted battery) is mounted on the vehicle, a pure electric vehicle (PEV) that runs by driving a travel motor with electric power supplied from the vehicle-mounted battery, and a fuel engine. The generated electric power is charged into the on-board battery, and a series hybrid vehicle that runs by driving the running motor with the electric power supplied from the battery, a parallel hybrid vehicle in which the running motor and the fuel engine run in cooperation, and these series. A series / parallel hybrid vehicle (HEV) having both functions of parallel, a fuel cell vehicle that charges the electric power generated by the fuel cell to the on-board battery and drives the traction motor with the electric power supplied from this battery to drive (FC
EV).

[0005]

In such an electric vehicle, when air-conditioning the vehicle compartment as described above, an electric compressor driven by power supply from a vehicle-mounted battery is used as a compressor of the car air conditioner. However, if the vehicle-mounted battery is discharged due to the power consumption of the electric compressor, there arises a problem that the traveling itself is hindered.

[0006] Also in a general fuel-engine vehicle, power is generated by an alternator driven by the engine, and this electric power is charged in a vehicle-mounted battery. Therefore, in this case, if the compressor of the car air conditioner is driven by an on-board battery as an electric compressor, the capacity control (operating frequency control) of the compressor can be easily performed, so that more comfortable vehicle air conditioning can be realized. If the on-board battery is discharged due to the power consumption in the above, the engine control device, the transmission control device, and the ignition device become malfunctioning, which hinders the traveling itself.

In order to solve such a problem, it is conceivable to increase the capacity of a vehicle-mounted battery, a fuel engine, and a fuel cell so as to sufficiently cover the power consumption of the electric compressor, but this causes an increase in cost. In addition, the weight of the vehicle itself increases, and conversely, the driving performance itself deteriorates and the exhaust gas increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art. In an automobile having a power storage means and an electric compressor driven by power supply from the power storage means, the power consumption of the electric compressor is high. It is intended to provide an air conditioning system for a vehicle which does not hinder running itself.

[0009]

That is, the automotive air conditioning system according to the first aspect of the present invention is used for an automobile having a power storage means and a power generation means for charging the power storage means,
An electric compressor driven by power supply from the power storage means, control means for controlling the operation of the electric compressor, and current detection means for detecting a charging current value to the power storage means, the control means comprising: An operation frequency of the electric compressor is gradually reduced when the charge current value falls below a predetermined set value based on a charge current value to the power storage unit detected by a current detection unit.

That is, according to the vehicle air conditioning system of the first aspect of the present invention, the vehicle air conditioner is used in a vehicle including a power storage means and a power generation means for charging the power storage means, and is driven by power supply from the power storage means. An electric compressor to be operated, control means for controlling the operation of the electric compressor, and current detecting means for detecting a charging current value to the electric storage means, wherein the control means Based on the charging current value to the means, when the charging current value falls below a predetermined set value, the operating frequency of the electric compressor is gradually reduced, so that the charging current value to the power storage means is set. When the value is lower than the value, it is possible to reduce the power consumption of the electric compressor and secure charging of the power storage means.

As a result, it is possible to prevent the charging of the power storage means from being stopped due to the power consumption of the electric compressor, and the amount of power stored in the power storage means is reduced, or the battery is completely discharged, resulting in a running failure and a running failure. The inconvenience can be effectively eliminated. In particular, in this case, the control means gradually lowers the operating frequency of the electric compressor, so that the inconvenience of a sudden decrease in the air conditioning capacity is also eliminated, and it is possible to maintain the most comfortable air conditioning in the passenger compartment as much as possible. It is what becomes.

According to a second aspect of the present invention, in the above-described vehicle air-conditioning system, the control means reduces the operating frequency of the electric compressor when the charging current value rises to a predetermined return value higher than the set value. The control is stopped.

According to the vehicle air conditioning system of the second aspect of the present invention, in addition to the above, when the charging current value rises to a predetermined return value higher than the set value, the control means may control the electric compressor. Since the lowering control of the operating frequency is stopped, the lowering control of the operating frequency of the electric compressor accompanying the lowering of the charging current value to the power storage means is stopped early,
Thus, it is possible to minimize a decrease in the cabin air conditioning capacity.

According to a third aspect of the present invention, there is provided an air conditioning system for a vehicle, which is used in a vehicle including a power storage means and a power generation means for charging the power storage means, and is driven by power supply from the power storage means. Control means for controlling the operation of the electric compressor, and current detection means for detecting a charging current value for the power storage means, wherein the control means controls charging of the power storage means detected by the current detection means. When the charging current value falls below a predetermined set value based on the current value, the operating frequency of the electric compressor is controlled such that the charging current value increases to a predetermined return value higher than the set value. And

According to the vehicle air conditioning system of the third aspect of the present invention, the air conditioning system is used for a vehicle having a power storage means and a power generation means for charging the power storage means, and is driven by power supply from the power storage means. An electric compressor, control means for controlling the operation of the electric compressor, and current detecting means for detecting a charging current value to the power storage means, wherein the control means controls the power storage means detected by the current detection means. Based on the charging current value, when the charging current value falls below a predetermined set value, the operating frequency of the electric compressor is controlled such that the charging current value rises to a predetermined return value higher than the set value. On the other hand, when the value of the charging current to the power storage means falls below the set value, the power consumption of the electric compressor can be reduced to secure the charging of the power storage means.

As a result, it is prevented that the power storage means is not charged due to the power consumption of the electric compressor, and the amount of power stored in the power storage means is reduced, or the battery is completely discharged, resulting in poor running and inability to run. The inconvenience can be effectively eliminated. In particular, in this case, the control means controls the operating frequency of the electric compressor so that the charging current value rises to a predetermined reset value higher than the set value. This makes it possible to shorten the period during which the performance is reduced as short as possible and to promptly return to more comfortable vehicle interior air conditioning.

A vehicle air conditioning system according to a fourth aspect of the present invention is used in a vehicle having a power storage means, and includes an electric compressor driven by power supply from the power storage means, and a control means for controlling the operation of the electric compressor. Current detection means for detecting a discharge current value from the power storage means, wherein the control means sets the discharge current value to a predetermined value based on the discharge current value from the power storage means detected by the current detection means. When the value exceeds the value, the operation frequency of the electric compressor is gradually reduced.

According to the vehicle air conditioning system of the present invention, an electric compressor used for an automobile having a power storage means and driven by power supply from the power storage means, and a control for controlling the operation of the electric compressor. Means,
Current detection means for detecting a discharge current value from the power storage means, wherein the control means sets the discharge current value to a predetermined value based on the discharge current value from the power storage means detected by the current detection means. When the discharge current value exceeds the set value, it is possible to reduce the power consumption of the electric compressor. it can.

This makes it possible to solve the problem that the amount of power stored in the power storage means is reduced due to the power consumption of the electric compressor, or the inconvenience of insufficient running or inability to run due to complete discharge. In particular, in this case, the control means gradually lowers the operating frequency of the electric compressor, so that the inconvenience of a sudden decrease in the air conditioning capacity is also eliminated, and it is possible to maintain the most comfortable air conditioning in the passenger compartment as much as possible. Becomes Further, under a situation where the running load is light, it is possible to discharge the electric storage means to the set value of the discharge current value to maximize the air-conditioning capacity, thereby realizing even more comfortable air conditioning in the vehicle interior. It is.

According to a fifth aspect of the present invention, in the vehicle air conditioning system according to the fourth aspect, when the discharge current value decreases to a predetermined return value lower than the set value, the control means controls the operating frequency of the electric compressor. Is characterized in that the lowering control is stopped.

According to a fifth aspect of the present invention, in addition to the fourth aspect, the control means is configured to control the electric motor when the discharge current value decreases to a predetermined return value lower than the set value. Since the control for lowering the operating frequency of the compressor is stopped, the control for lowering the operating frequency of the electric compressor due to an increase in the discharge current value from the power storage means can be stopped early to minimize the reduction in the air conditioning capacity of the vehicle interior. That is what you can do.

An air conditioning system for a vehicle according to a sixth aspect of the present invention is used in a vehicle having a power storage means, and includes an electric compressor driven by power supply from the power storage means, and a control means for controlling the operation of the electric compressor. Current detection means for detecting a discharge current value from the power storage means, wherein the control means sets the discharge current value to a predetermined value based on the discharge current value from the power storage means detected by the current detection means. When the value exceeds the value, the operating frequency of the electric compressor is controlled such that the discharge current value decreases to a predetermined return value lower than the set value.

According to the vehicle air conditioning system of the present invention, the electric compressor is used in an automobile having a power storage means and is driven by power supply from the power storage means, and a control for controlling the operation of the electric compressor. Means,
Current detection means for detecting a discharge current value from the power storage means, wherein the control means sets the discharge current value to a predetermined value based on the discharge current value from the power storage means detected by the current detection means. If the discharge current value exceeds the set value, the operating frequency of the electric compressor is controlled so that the discharge current value decreases to a predetermined return value lower than the set value. Can reduce the discharge by controlling the operating frequency of the electric compressor.

Thus, it is possible to solve the problem that the amount of power stored in the power storage means is reduced due to the power consumption of the electric compressor, or the inconvenience of insufficient running or running failure due to complete discharge. In particular, in this case, the control means controls the operating frequency of the electric compressor so that the discharge current value decreases to a predetermined return value lower than the set value. This makes it possible to shorten the period during which the performance is reduced as short as possible and to promptly return to more comfortable vehicle interior air conditioning. Further, under a situation where the running load is light, it is possible to discharge the electric storage means to the set value of the discharge current value to maximize the air-conditioning capacity, thereby realizing even more comfortable air conditioning in the vehicle interior. It is.

A vehicle air conditioning system according to a seventh aspect of the present invention is used in a vehicle having a power storage means, and includes an electric compressor driven by power supply from the power storage means, and a control means for controlling the operation of the electric compressor. With
The control means, when performing an operation to increase the power consumption of the electric compressor, based on the allowable discharge increase amount allowed by the power storage means, the power consumption of the electric compressor within the range of the allowable discharge increase amount. It is characterized by increasing.

According to the seventh aspect of the present invention, there is provided an air conditioning system for a vehicle, which is used in a vehicle having a power storage means, and which is driven by power supply from the power storage means, and a control for controlling the operation of the electric compressor. Means for increasing the power consumption of the electric compressor, based on an allowable discharge increase amount permitted by the power storage means, and controlling the electric motor within a range of the allowable discharge increase amount. Since the power consumption of the compressor is increased, the increase in the power consumption of the electric compressor is limited to at least a range of an allowable increase in discharge of the power storage means.

Thus, it is possible to solve the problem that the amount of power stored in the power storage means is reduced due to the power consumption of the electric compressor, or the inconvenience that the battery is completely discharged and the running is poor or the running is impossible. Further, in a situation where the traveling load is light, the power storage means can be discharged within an allowable range to increase the air-conditioning capacity as much as possible, so that a more comfortable vehicle air-conditioning can be realized.

An air conditioning system for a vehicle according to an eighth aspect of the present invention is characterized in that, in each of the above-mentioned inventions, the vehicle is an electric vehicle running by a running motor supplied with power from the power storage means.

According to the air-conditioning system for an automobile of the invention of claim 8, in addition to the above-mentioned inventions, the automobile is an electric automobile which is driven by a traction motor supplied from the power storage means. It is possible to effectively eliminate the adverse effect of the operation of the electric compressor on the operation of the electric vehicle while smoothly performing the air conditioning in the vehicle interior.

[0030]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a configuration diagram of an automobile 1 as an embodiment to which the automobile air conditioning system of the present invention is applied, FIG. 2 is a configuration diagram of a drive system of the automobile 1 of FIG. 1, and FIG. Air conditioner (AC)
9, FIG. 4 is a refrigerant circuit diagram of the air conditioner 9, and FIG.
1 shows a block diagram of a control system of the vehicle 1 including the vehicle air conditioning system of the present invention.

In each figure, the vehicle 1 of the embodiment is the above-mentioned hybrid vehicle (HEV).
Is mounted with an air conditioner 9 having an engine (internal combustion engine) 2 and an air conditioning control device 28 constituting control means. The air conditioner 9 performs air conditioning such as cooling, heating, and dehumidification in the cabin of the automobile 1, and a pipe 10A on a discharge side of a compressor (electric compressor) 10 configured by a rotary compressor or the like serves as an outdoor heat exchanger. Is connected to the condenser 13, and the outlet side of the condenser 13 is connected to the receiver 1.
7 is connected.

The outlet pipe 17A of the liquid receiver 17 is connected to an expansion valve 18 as a pressure reducing device, and the expansion valve 18 is connected to an evaporator 19 as an indoor heat exchanger (cooler). The outlet side of the evaporator 19 is connected to the pipe 10B on the suction side of the compressor 10 to form an annular refrigeration cycle (refrigerant circuit) (FIG. 4). In FIG. 1, reference numeral 33 denotes a heater, which is used to heat the vehicle interior.

The compressor 10, the condenser 13, the engine 2 and the like are provided outside the passenger compartment where no one gets on the vehicle, and the evaporator 19 is installed inside the passenger compartment where one gets on. The compressor 10 is provided with a compressor motor (electric motor) 11, and the compressor 10 is driven by the compressor motor 11. The condenser 13 is provided with an outdoor blower 15.
Is driven to rotate by an outdoor blower motor 16. The evaporator 19 is provided with an indoor blower 21, and the indoor blower 21 is driven to rotate by an indoor blower motor 22.

A temperature sensor 12 for detecting the refrigerant discharge temperature is provided on the refrigerant discharge side of the compressor 10, and a temperature sensor 14 for detecting the refrigerant outlet temperature is provided on the refrigerant outlet side of the condenser 13. And evaporator 1
A temperature sensor 20 for detecting the temperature of the refrigerant outlet is provided on the refrigerant outlet side of 9, and these are connected to an air conditioning controller 28. Further, a temperature sensor 23 for detecting the temperature of air blown into the vehicle interior from the indoor blower 21.
Is also connected to the air conditioning controller 28. Further, the outdoor air blower motor 16, the indoor air blower motor 22, the temperature setting volume 24 provided on the air conditioning operation panel in the vehicle cabin, the air conditioning switch 25, and the like are also connected to the air conditioning control device 28.

Here, the air-conditioning control device 28 steps up or down the voltage (for example, 240 V DC) of the on-board battery (or capacitor, both of which constitutes a power storage means) to a desired voltage by a predetermined step-up / step-down circuit. And the compressor motor 11 by the inverter
And the compressor 10 is rotationally driven.

The air-conditioning controller 28 changes the number of revolutions of the indoor blower 21 in three steps of 1.2.3 and AUTO, which rotates in proportion to the number of revolutions of the compressor 10, in the vehicle interior. Is connected to a blower fan switch 26 for manually determining the amount of air to be blown to the blower. 2
Reference numeral 7 denotes a power supply (auxiliary power supply) for converting the voltage of the battery 5 to DC 12 V and operating a headlight (not shown), a direction indicator, a radio (shown by other loads in FIG. 5), an air conditioning controller 28, and the like. ).

The automobile 1 has an engine (internal combustion engine) 2
And a traveling motor (electric motor as traveling driving means. M) 3 and a generator (power generating means. G) 4 (these constitute a motor control system of the HEV). Motor 3 is connected to a vehicle-mounted battery (DC 240 V) 5 via a motor control inverter 3A, and a generator 4 is connected to a power generation inverter (IN).
V) It is connected to the vehicle-mounted battery 5 via 4A.
A torque dividing mechanism (not shown) is connected to the engine 2, the traveling motor 3, and the generator 4. The torque dividing mechanism connects the traveling motor 3 and the generator 4, and the rotation of the engine 2 and the traveling motor 3 to one. , The continuously variable transmission 6 described later is driven. The technology for driving the continuously variable transmission 6 by combining the rotations of the traveling motor 3 and the generator 4 and the rotation of the engine 2 and the traveling motor 3 with one by the torque dividing mechanism is a known technology. Detailed description is omitted.

The traveling motor 3 is mainly used at the time of starting and low speed of the engine 2 with poor thermal efficiency, and is also used as an assist driving source when a driving force more than the driving force of the engine 2 alone is required. . Then, as the engine 2 moves to a high speed with high thermal efficiency, the engine 2 operates under the initiative of the engine 2.
In addition, when the engine 2 is driven, the electric power generated by the generator 4 according to the state of charge of the vehicle-mounted battery 5 is used.
Is charged. Further, the generator 4 is used as a starter when the engine 2 is started, in addition to the power generation function during the rotation of the engine 2.

The continuously variable transmission (CVT mechanism (Conti)
nuously VariableTransmississ
ion)) 6 is connected to wheels 7. Then, the engine 2 or the traveling motor 3 rotates the wheels 7 via the continuously variable transmission 6 to drive the automobile 1.

The technique of running the automobile 1 by rotating the wheels 7 by the continuously variable transmission 6 driven by the engine 2 or the driving motor 3 is a well-known technique in the related art, and will be described in detail. Omitted.

Reference numeral 8 in FIG. 5 denotes a main control unit (VCU) of the automobile 1 which constitutes the control means. The main control unit (VCU) raises or lowers the voltage (240 V DC) of the vehicle-mounted battery 5 to a predetermined voltage by the same step-up / step-down circuit as described above. , Inverter
(Motor control inverter 3A) converts the drive voltage into a drive voltage for the travel motor 3, and rotates the travel motor 3.

The air-conditioning control device 28 generates a drive signal for the compressor 10. And the air conditioning control device 2
Numeral 8 detects the position of the rotor of the compressor motor 11 from the induced voltage of the compressor motor 11, and controls the operating frequency (the number of revolutions) of the compressor motor 11 by an inverter which creates the next excitation pattern by a microcomputer. In addition, in FIG.
Control device (BATT) for controlling the electric power of
An ECU (ECU) 34 is an engine control device (ENGECU) for transmitting a torque command, an accelerator opening, and the like to the engine 2 to control the operation thereof. Reference numeral 36 denotes a driving operation unit such as an accelerator, a brake pedal, a shift lever, and the like of the automobile 1, and a sensor for detecting an operation amount and an operation state of the operation unit is connected to the main control device 8.

Here, the basic air conditioning operation of the vehicle interior by the air conditioner 9 will be described. The compressor motor 11 and the outdoor blower motor 16 are connected to the on-board battery 5.
More power. When the air conditioner 9 is operated, the air conditioning controller 28 controls the operating frequency of the compressor motor 11 to control the capacity of the compressor 10. The high-temperature and high-pressure gas refrigerant compressed and discharged by the compressor 10 flows into the condenser 13 from the pipe 10A. At this time, the condenser 13 is cooled outside the vehicle compartment by the air blown by the outdoor blower 15 (arrows shown in FIG. 1). The gas refrigerant flowing into the condenser 13 radiates heat there to be condensed and liquefied, and then flows into the liquid receiver 17. The liquid refrigerant once stored in the liquid receiver 17 reaches the expansion valve 18 via the pipe 17A, is throttled there, and flows into the evaporator 19.

The refrigerant flowing into the evaporator 19 evaporates there and absorbs heat from the surroundings at that time to exert a cooling function, and the cooled air in the cabin is circulated into the cabin by the indoor blower 21. Cooling and air conditioning are performed (arrows in FIG. 1). The refrigerant that has exited the evaporator 19 enters an accumulator (not shown), where the unevaporated liquid refrigerant is separated into gas and liquid, and then only the gas refrigerant is sucked into the compressor 10, compressed again by the compressor 10, and discharged. Repeat the refrigeration cycle.

Next, the temperature of the air blown into the cabin (the temperature detected by the temperature sensor 23 for detecting the temperature of the air blown into the cabin from the indoor blower 21) and the operating frequency of the compressor motor 11 The relationship between the rotation speed of the indoor blower motor 22 and the rotation speed of the indoor blower motor 22 is shown in the following formula. In the calculation formula, PI is calculated from the difference (Δe) between the difference (e) between the outlet temperature of the evaporator 19 and the set temperature and the previous difference (em).
Performs (proportional / integral) calculations and sets the target operating frequency (F)
To determine. Δe = e-em (1) In the equation (1), e = (set temperature = temperature set by the temperature setting volume 24) − (air outlet temperature = temperature detected by the temperature sensor 23), The initial value of em: 0 is shown. ΔF = Kp × Δe + Ki × e (2) In the equation (2), ΔF: a calculated value of a target operating frequency variation, Kp: a proportional constant, and Ki: an integral constant. F = ΔF + Fm (3) In equation (3), Fm represents the previous target operating frequency.

The target operating frequency obtained from the above equation is applied to the following equation, and the voltage applied to the indoor blower motor 22 is expressed as P
WM control (adjustment of applied voltage) is performed to adjust the air volume of the indoor blower 21. PWMduty = (MAXduty−MINduty) / (MAX frequency−MIN frequency) × (Target frequency−MIN frequency) + MINduty (4) In the equation (4), MAXduty: indoor blower PWM
Control maximum duty, MIN duty: indoor blower PWM
Control minimum duty, MAX frequency: maximum target operation frequency, MIN frequency: minimum target operation frequency.

That is, the air-conditioning control device 28 determines the operating frequency of the compressor motor 11 based on the temperature of the air blown into the passenger compartment by the indoor blower 21.
Then, the rotation speed of the indoor blower motor 22 is controlled based on the determined operating frequency of the compressor motor 11. That is, when the temperature of the air in the vehicle compartment is slightly higher than the temperature set by the temperature setting volume 24, the operating frequency of the compressor motor 11 and the rotation speed of the indoor blower motor 22 are slightly increased (compressor motor 11 Power consumption increases slightly). As a result, the rotational noise between the compressor motor 11 and the indoor blower motor 22 does not become extremely high, but only slightly increases.

When the temperature of the air in the vehicle compartment is much higher than the temperature set by the temperature setting volume 24, the operating frequency of the compressor motor 11 and the rotation speed of the indoor blower motor 22 are increased to increase the vehicle interior. Air-conditioning can be performed rapidly, and comfortable air-conditioning can be performed (power consumption of the compressor motor 11 greatly increases). In particular, when the temperature of the air in the passenger compartment does not significantly change from the set temperature set by the temperature setting volume 24,
Comfortable vehicle air-conditioning can be performed by controlling the capacity of the compressor motor 11 by controlling the operating wave number and controlling the small air volume of the indoor blower 21 determined based on the control.

As described above, since the air-conditioning controller 28 controls the operating frequency of the compressor motor 11 based on the deviation between the outlet temperature of the evaporator 19 and the set temperature, the greater the temperature deviation, the greater the compressor motor. The rotation speed of the compressor motor 11 is increased (power consumption is large), and if the temperature deviation is eliminated, the rotation speed of the compressor motor 11 is reduced to a value close to 0 (power consumption is reduced). in this case,
Since the indoor blower motor 22 is also controlled in the same manner as the compressor motor 11, it is possible to blow an air volume corresponding to the temperature difference felt by the occupants in the vehicle compartment, and to perform comfortable vehicle interior air conditioning.

Further, since the power is supplied from the vehicle-mounted battery 5 to the compressor motor 11, the rotation speed of the compressor motor 11 can be easily controlled. As a result, it is possible to suitably control the rotation speed of the compressor motor 11. Accordingly, the compressor 10 can be suitably driven, and comfortable air conditioning in the vehicle cabin can be performed.

Next, electric power control related to the air conditioner 9 of the automobile 1 according to the present invention will be described with reference to FIG. In FIG. 5, CT1 is a current transformer (current transformer) as current detecting means for detecting a charging current value to the vehicle-mounted battery 5 and a discharging current value from the vehicle-mounted battery 5.
The charging current value or discharging current value detected by the current transformer CT1 is input to the battery control device 32. CT2 is a current transformer for detecting a generated current value of the generator 4, and the generated current value detected by the current transformer CT2 is input to the motor control system 37.

CT3 is a current transformer for detecting a generated current value passed through the power generation inverter 4A. The generated current value detected by the current transformer CT3 is also input to the motor control system 37. CT5 is a current transformer for detecting a current value (consumption current value) of the air conditioner 9 including the compressor motor 11, and the current value detected by the current transformer CT5 is input to the air conditioning controller 28. In addition, the main control device 8, the motor control system 37, the engine control device 34, the battery control device 32, and the air conditioning control device 28
Connected to a network (hereinafter referred to as CAN)
Data transmission and reception are performed mutually via this CAN.
In addition, the detection current value (discharge current,
The data of the charging current and the generated current are also transmitted from the motor control system 37 and the control devices 32 and 28 to the CAN, and can be mutually used by devices connected to the CAN.

The motor control system 37 uses the surplus power generation ΔG1 (power generation) that allows the power generator 4 to further generate power based on the current power generation current value of the power generator 4 detected by the current transformers CT2 and CT3 and the rotation speed of the engine 2. The maximum allowable power that can be supplied by the machine 4-the generated power currently being output) is calculated. Then, the data of the surplus power generation amount ΔG1 is transmitted to the CAN. The engine control device 34 further calculates a margin horsepower ΔH that the engine 2 can output by subtracting the currently output torque from the maximum torque curve of the engine 2. Then, the data of the surplus horsepower ΔH is transmitted to the CAN.

The battery control unit 32 estimates the charged amount of the vehicle-mounted battery 5 from the integrated value of the discharge current detected by the current transformer CT1 and the voltage of the vehicle-mounted battery 5, and calculates the discharge current value detected by the current transformer CT1 and the vehicle-mounted battery. 5, the amount of increase in the discharge current allowed in the vehicle-mounted battery 5 (the limit discharge amount of the battery 5-
The allowable discharge increase amount ΔE, which is the current discharge amount, is calculated.
Then, the data of the allowable discharge increase amount ΔE is transmitted to the CAN.

The main controller 8 compares the surplus power generation amount ΔG1 transmitted on the CAN with the surplus horsepower ΔH as described above, and determines the smaller value as the permissible increase amount of the power generation amount permitted by the generator 4. It is assumed that the power generation increase amount ΔG. Then, the data of the allowable power generation increase ΔG is transmitted to the CAN. The main controller 8 also adds the allowable discharge increase ΔE to the allowable power increase ΔG.
Is calculated (ΔG + ΔE), and the data is also transmitted to the CAN. Further, main controller 8 adds the allowable discharge increase amount ΔE to the allowable power increase amount ΔG, and subtracts 0 from the added value by subtracting the surplus horsepower ΔH.
The surplus power utilization rate α that fluctuates in the range of 1 or less is calculated. The surplus power utilization rate α decreases (approaches 0) when the ratio of the surplus horsepower ΔH to the value obtained by adding the permissible power generation increase ΔG and the permissible discharge increase ΔE is large (approaches 0). If it is small, it will be large (approach 1). And the data of the marginal power utilization rate α is also CA
N.

Further, main controller 8 multiplies a value obtained by adding the allowable power generation increase ΔG and the allowable discharge increase ΔE by a marginal power utilization rate α, thereby further increasing power consumption in air conditioner 9. Is the allowable power consumption increase Δ
Calculate U. In this case, the ratio of the surplus horsepower ΔH to the value obtained by adding the permissible power generation increase ΔG and the permissible discharge increase ΔE is large, and when the surplus power utilization rate α is small, the permissible power consumption increase ΔU becomes small. When the ratio of the horsepower ΔH is small and the surplus power utilization rate α is large, the allowable power consumption increase ΔU becomes large. For example, when the surplus horsepower ΔH is 0 and the surplus power utilization rate α is 1, the value obtained by adding the allowable power generation increase ΔG and the allowable discharge increase ΔE is the allowable power consumption increase Δ
It becomes U. Then, main controller 8 also transmits the data of the allowable power consumption increase amount ΔU to the CAN.

The air-conditioning control device 28 transmits the surplus power generation amount ΔG1, the surplus horsepower ΔH, the permissible power generation increase amount ΔG, the permissible discharge increase amount ΔE, the surplus power utilization rate α, and the permissible power consumption increase ΔU transmitted to the CAN. Are received and utilized for control as described later. Note that the allowable power consumption increase amount ΔU is allowed when the power consumption of the air conditioner 9 increases when the air conditioning control device 28 of the air conditioner 9 performs the basic cabin air conditioning operation as described above. The power consumption of the air conditioner 9 increases.

With the above configuration, an actual control operation will be described with reference to FIG. The air-conditioning control device 28 of the air-conditioning apparatus 9 constantly feeds back and monitors the charging current value Ic to the vehicle-mounted battery 5 detected by the current transformer CT1 transmitted to the CAN as described above. As shown in the upper part of FIG. 6, when the air conditioning control device 28 falls below a predetermined set value Is1, which is a minimum allowable lower limit, the air conditioner control device 28 operates regardless of the above-described basic air conditioning operation in the vehicle interior. The operating frequency is gradually decreased stepwise by a predetermined frequency (Δf) every predetermined period (Δt time) as shown in the lower part of FIG.

Since the power consumption of the compressor motor 11 gradually decreases due to such a decrease in the operating frequency of the compressor motor 11, the charging current value Ic to the vehicle-mounted battery 5 also gradually decreases as shown in the upper part of FIG. Going up. When the air-conditioning control device 28 rises to a predetermined return value Is2 higher than the set value Is1, the air-conditioning control device 28 stops the stepwise reduction of the operating frequency of the compressor motor 11 as described above, and The operation returns to the indoor air-conditioning operation.

That is, the charging current value I to the vehicle-mounted battery 5
When c is smaller than the set value Is1, it is possible to reduce the power consumption of the compressor motor 11 and secure charging of the vehicle-mounted battery 5. This prevents the in-vehicle battery 5 from being no longer charged due to the power consumption of the compressor motor 11, and reduces the charged amount of the in-vehicle battery 5, or causes the in-vehicle battery 5 to be completely discharged, causing the traveling motor 3 to run poorly. -The inconvenience of being unable to travel can be effectively eliminated. In particular, in this case, the air-conditioning control device 28 gradually lowers the operating frequency of the compressor motor 11, so that the inconvenience of the air-conditioning device 9 being rapidly reduced in air-conditioning performance is also eliminated, and the air-conditioning is as comfortable as possible. It is also possible to maintain vehicle interior air conditioning.

When the charging current value Ic rises to the reset value Is2 higher than the set value Is1, the air-conditioning control device 28 stops the lowering control of the operating frequency of the compressor motor 11, so Charge current value I
The control for lowering the operating frequency of the compressor motor 11 due to the decrease in c is stopped early, and the decrease in the air conditioning capacity of the vehicle interior can be minimized.

Next, another power control related to the air conditioner 9 according to the present invention will be described with reference to FIG. Also in this case, the air-conditioning control device 28 of the air-conditioning apparatus 9 constantly feeds back and monitors the charging current value Ic to the vehicle-mounted battery 5 detected by the current transformer CT1 and transmitted to the CAN. The predetermined threshold value I which decreases and is higher than the set value Is1 as shown in the upper part of FIG.
If it is less than s3, the air-conditioning control device 28 prohibits an increase in the operating frequency of the compressor motor 11 as shown in the lower part of FIG. As a result, the increase in power consumption of the compressor motor 11 is eliminated or slowed.

The charging current value Ic is maintained at the threshold value Is3
When the air conditioner control device 28 returns to the above-described higher return value Is2, the air conditioner controller 28 returns to the above-described basic air conditioning operation in the vehicle interior, but as shown in the upper part of FIG. When the value falls below the set value Is1, the air-conditioning control device 28 performs a predetermined period (Δt time) as shown in the lower part of FIG.
Each time, the frequency is gradually decreased by a predetermined frequency (Δf).

Then, such a compressor motor 1
1, the compressor motor 11
And the charging current value Ic to the vehicle-mounted battery 5 also gradually increases to the return value Is2 as shown in the upper part of FIG. 7, and the air-conditioning control device 28 controls the compressor motor as described above. The step-by-step operation frequency lowering control of step 11 is stopped, and the operation returns to the above-described basic air conditioning operation.

According to this control, the increase in the operating frequency of the compressor motor 11 can be prohibited in advance when the threshold value Is3 has been reached before reaching the set value Is1, so that the charging current value is smaller than in the case of FIG. After Ic reaches the set value Is1, the so-called undershoot that further falls can be reduced.

Next, still another power control related to the air conditioner 9 in the present invention will be described with reference to FIG. Also in this case, the air-conditioning control device 28 of the air conditioner 9
The charging current value Ic to the vehicle-mounted battery 5 detected by the current transformer CT1 transmitted above is constantly monitored by feedback, and as shown in the upper part of FIG.
When c decreases and falls below the set value Is1, the air-conditioning control device 28 determines the PI by the formula of F (Is2-Ic).
, The operating frequency of the compressor motor 11 is calculated so that the charging current value Ic to the vehicle-mounted battery 5 becomes the above-mentioned return value Is2.
Is controlled to a value calculated by the calculation.

As a result, the operating frequency of the compressor motor 11 is rapidly reduced as shown in the lower part of FIG. 8, whereby the charging current value Ic also recovers rapidly as shown in the upper part of FIG. Then, when the air conditioning control device 28 rises to the return value Is2, the air conditioning control device 28 stops the above-described control for lowering the operating frequency of the compressor motor 11 and returns to the above-described basic vehicle interior air conditioning operation.

That is, also in this case, when the charging current value Ic to the vehicle-mounted battery 5 falls below the set value Is1, the power consumption of the compressor motor 11 is reduced to secure the charging to the vehicle-mounted battery 5. It becomes possible. This prevents the in-vehicle battery 5 from being charged by the power consumption of the compressor motor 11, and
It is possible to effectively eliminate the inconvenience that the amount of charge stored in the on-vehicle battery 5 is reduced, or the vehicle is completely discharged, resulting in poor running or inability to run. In particular, in this case, the air-conditioning control device 28 controls the operating frequency of the compressor motor 11 so that the charging current value Ic rises to the reset value Is2 higher than the set value Is1, so that the charging current value Ic to the vehicle-mounted battery 5 is quickly reduced. , And the period during which the vehicle interior air-conditioning capacity is reduced can be shortened as much as possible so that the vehicle interior can be returned to a more comfortable vehicle interior air conditioner at an early stage.

The power consumption of other electric loads of the automobile 1 may be reduced by the main controller 8 or the like in addition to the operation frequency control of the compressor motor 11. In this case, priorities are given in advance to the loads of the vehicle 1 electrically, and power supply is stopped from a load with a low priority (for example, a load such as an audio or a room light that does not hinder the traveling of the vehicle 1 itself). -Reduction may be performed.

Next, still another power control related to the air conditioner 9 in the present invention will be described with reference to FIG. In this case, the air conditioning controller 2 of the air conditioner 9
In FIG. 9, a discharge current value Ie from the vehicle-mounted battery 5 detected by the current transformer CT1 transmitted to the CAN is always fed back and monitored.
When the air-conditioning control device 28 rises and exceeds the allowable discharge current value Is (set value) as shown in the upper part, the compressor motor 1
As shown in the lower part of FIG.
Every time), the frequency is gradually decreased stepwise by a predetermined frequency (Δf).

Since the power consumption of the compressor motor 11 gradually decreases due to such a decrease in the operating frequency of the compressor motor 11, the discharge current value Ie from the vehicle-mounted battery 5 also gradually decreases as shown in the upper part of FIG. It is going down. When the air-conditioning control device 28 has decreased to a predetermined return value (Is-ΔIe) lower than the allowable discharge current value Is, the air-conditioning control device 28 stops the stepwise reduction of the operating frequency of the compressor motor 11 as described above, The operation returns to the above-described basic air conditioning operation.

That is, when the discharge current value Ie from the vehicle-mounted battery 5 exceeds the allowable discharge current value Is, the power consumption of the compressor motor 11 can be reduced. It is possible to solve the problem that the storage amount of the battery 5 decreases or the discharge of the battery is completely stopped, and the traveling motor 3 becomes inconvenient to travel or cannot travel. In particular, in this case, the air-conditioning control device 28 gradually reduces the operating frequency of the compressor motor 11, so that the inconvenience of the air-conditioning capability dropping sharply is also eliminated, and the air conditioning in the vehicle interior is maintained as comfortable as possible. It is also possible to do.
Further, in a situation where the running load is light, the vehicle-mounted battery 5 can be discharged to the allowable discharge current value Is to increase the air-conditioning capacity to the maximum, so that a more comfortable vehicle air-conditioning can be realized.

Further, the air-conditioning control device 28 determines that the discharge current value Ie is lower than the predetermined discharge value (I
s-ΔIe), the compressor motor 1
Since the control for lowering the operating frequency of No. 1 is stopped, the control for lowering the operating frequency of the compressor motor 11 due to the increase in the discharge current value Ie from the on-vehicle battery 5 is stopped early to minimize the reduction in the air conditioning capacity of the vehicle interior. It can be suppressed.

Next, still another power control related to the air conditioner 9 of the present invention will be described with reference to FIG. Also in this case, the air-conditioning control device 28 of the air conditioner 9 constantly monitors the discharge current value Ie from the vehicle-mounted battery 5 detected by the current transformer CT1 transmitted to the CAN by feeding back the current value. The allowable discharge current value Is rises as shown in the upper part of FIG.
When the air conditioner exceeds a predetermined threshold (Is-ΔIe1) lower than the predetermined threshold (Is-ΔIe1), the air conditioning control device 28 operates as shown in the lower part of FIG. Prohibit the rise of As a result, the increase in power consumption of the compressor motor 11 is eliminated or slowed.

The discharge current value Ie is maintained at the threshold value (Is
When the return value (Is-ΔIe) is lower than the return value (Is-ΔIe), the air-conditioning control device 28 returns to the above-described basic air-conditioning operation in the vehicle interior. However, as shown in the upper part of FIG. When Ie further rises and exceeds the allowable discharge current value Is, the air-conditioning control device 28 sets the predetermined frequency (Δt) every predetermined period (Δt time) as shown in the lower part of FIG.
f) Gradually lower it step by step.

Then, such a compressor motor 1
1, the compressor motor 11
, The discharge current value Ie from the vehicle-mounted battery 5 also gradually decreases to the return value (Is-ΔIe) as shown in the upper part of FIG. As described above, the stepwise lowering of the operation frequency of the compressor motor 11 is stopped, and the operation returns to the above-described basic air conditioning operation.

According to this control, the increase in the operating frequency of the compressor motor 11 can be prohibited in advance when the threshold value (Is-ΔIe1) is exceeded before reaching the allowable discharge current value Is. When the discharge current value Ie reaches the allowable discharge current value Is, the so-called overshoot, which further increases, can be reduced.

Next, still another power control related to the air conditioner 9 according to the present invention will be described with reference to FIG. Also in this case, the air-conditioning control device 28 of the air conditioner 9 constantly monitors the discharge current value Ie from the vehicle-mounted battery 5 which is detected by the current transformer CT1 and transmitted to the CAN, by feedback, as shown in the upper part of FIG. As described above, the discharge current value Ie increases and the allowable discharge current value Is
Is exceeded, the air-conditioning control device 28 sets F (Ie− (Is
−ΔIe)), the operation frequency of the compressor motor 11 is calculated such that the discharge current value Ie from the vehicle-mounted battery 5 becomes the above-mentioned return value (Is−ΔIe) by the feedback operation of the PI by the calculation formula of the PI. The operating frequency of the compressor motor 11 is controlled to a value calculated by the calculation, regardless of a typical vehicle interior air-conditioning operation.

As a result, the operating frequency of the compressor motor 11 is rapidly reduced as shown in the lower part of FIG.
Thereby, the discharge current value Ie also recovers rapidly as shown in the upper part of FIG. Then, the return value (Is-Δ
When the air conditioning control device 28 has decreased to Ie), the air conditioning control device 28 stops the above-described operation frequency reduction control of the compressor motor 11 and returns to the above-described basic vehicle interior air conditioning operation.

That is, also in this case, when the discharge current value Ie from the vehicle-mounted battery 5 exceeds the allowable discharge current value Is, the discharge frequency can be reduced by controlling the operating frequency of the compressor motor 11. As a result, it is possible to solve the problem that the amount of power stored in the vehicle-mounted battery 5 is reduced due to the power consumption of the compressor motor 11 or the inconvenience that the traveling motor 3 is completely discharged and the traveling motor 3 becomes poor in traveling or incapable of traveling. become. In particular, in this case, the air-conditioning control device 28 controls the operating frequency of the compressor motor 11 so that the discharge current value Ie decreases to a predetermined return value (Is-ΔIe) lower than the allowable discharge current value Is. From the discharge current value Ie from
The period during which the vehicle interior air-conditioning capacity is reduced can be made as short as possible, and the vehicle can be returned to more comfortable vehicle interior air-conditioning at an early stage. Further, in a situation where the running load is light, the vehicle-mounted battery 5 can be discharged to the allowable discharge current value Is to increase the air-conditioning capacity to the maximum, so that a more comfortable vehicle air-conditioning can be realized.

In this case, in addition to the operation frequency control of the compressor motor 11, the power consumption of other electric loads of the automobile 1 may be reduced by the main controller 8 as described above. Good.

Next, still another power control related to the air conditioner 9 according to the present invention will be described with reference to the flowchart of FIG. In this case, the air conditioning controller 28 of the air conditioner 9 receives the allowable discharge increase ΔE of the battery 5 transmitted on the CAN as described above in step S1 of FIG. Next, in step S2, the air-conditioning control device 28 calculates a power consumption increase ΔI of the air-conditioning device 9 that will be required in the future when performing the basic vehicle interior air-conditioning operation as described above.

Next, the air-conditioning control device 28 proceeds to step S3.
It is determined whether or not the power consumption increase amount ΔI is smaller than the allowable discharge increase amount ΔE. If the power consumption increase amount ΔI is smaller than the allowable discharge increase amount ΔE, control of the compressor motor 11 or the like that increases the power consumption up to ΔI is executed in step S4. On the other hand, in step S3, the power consumption increase amount Δ
If I is equal to or greater than the allowable discharge increase amount ΔE, step S5
Regardless of the basic cabin air conditioning operation described above,
The control of the compressor motor 11 and the like similar to that described above for increasing the power consumption up to the allowable discharge increase ΔE is executed.

As a result, the increase in the power consumption of the compressor motor 11 is limited to at least the range of the allowable discharge increase ΔE of the vehicle-mounted battery 5. Therefore, it is possible to solve the problem that the amount of power stored in the vehicle-mounted battery 5 is reduced due to the power consumption of the compressor motor 11 or the traveling motor 3 is incompletely discharged and the traveling motor 3 falls into a traveling failure or cannot travel. . Further, under a situation in which the running load is light, the vehicle-mounted battery 5 can be discharged within an allowable range to increase the air-conditioning capacity to the maximum, and more comfortable vehicle air-conditioning can be realized.

In the above embodiment, the air conditioning controller 28 of the air conditioner 9 is also connected to the CAN. However, the present invention is not limited to this. The air conditioning controller 28 of the air conditioner 9 is connected to the CAN as shown in FIG. Instead of being connected, the main controller 8 may be connected by a signal line. In this case, the allowable power consumption increase ΔU is not calculated by the air-conditioning control device 28, but receives the value calculated by the main control device 8.

Further, in the above-described embodiment, the present invention has been described with reference to a hybrid vehicle (HEV) as the vehicle 1. However, the present invention is not limited to this, and is also applicable to a fuel cell vehicle (FCEV) as shown in FIG. . In this figure, the same reference numerals in FIGS. 1 to 5 indicate the same or similar functions, but in this case, the traveling motor 3
Are connected to the on-vehicle battery 5 via the motor control inverter 3A to form a motor control system 37, and power generation is performed in a fuel cell (FC) 41. Then, the fuel cell 41 is connected to the vehicle-mounted battery 5, and charging is performed.

Further, the current generated by the fuel cell 41 is detected by the current transformer CT4 and input to the fuel cell 41. The detected current value is also transmitted to the CAN, and the amount of power generated by the fuel cell 41 is transmitted via the CAN. And is controlled by a command signal from main controller 8. Then, the data of the allowable power generation increase ΔG in the fuel cell 41 is transmitted from the fuel cell 41 to the CAN in the same manner as described above, and the travel motor 3
Is also transmitted from the motor control system 37 to the CAN from the maximum torque curve obtained by subtracting the current torque from the maximum torque curve. Further, the allowable discharge increase amount ΔE is also transmitted from the battery control device 32 to the CAN, whereby power control related to the air conditioner 9 can be realized in the same manner as in the case of the hybrid vehicle described above. FIG. 15 shows an example in which the air-conditioning control device 28 of the air-conditioning apparatus 9 is not connected to the CAN in FIG. 14 similarly to FIG. 13 described above.

The inventions other than claim 8 can also be applied to a normal fuel-engine vehicle as shown in FIG. In this figure, the same reference numerals as those in FIGS. 1 to 5 have the same or similar functions. In this case, the electric power generated by the generator (GEN) 43 driven by the driving fuel engine (internal combustion engine) 42 is charged to the vehicle-mounted battery 5 (DC42V), and the vehicle-mounted battery 5
The electric power of the air conditioner 9 is driven by the electric power. Then, the fuel engine 42 is controlled by the engine control device 34 connected to the CAN, and the detected value of the current transformer CT3 is also input to the engine control device 34 to control the power generation amount of the generator 43. The surplus power generation amount ΔG1 of the generator 43 is calculated by the engine control device 34, and the data is transmitted to the CAN. Also, the extra horsepower ΔH
Is transmitted from the engine control unit 34 to the CAN. Further, the allowable discharge increase amount ΔE is also transmitted from the battery control device 32 to the CAN, whereby power control related to the air conditioner 9 can be realized in the same manner as in the case of the hybrid vehicle described above. FIG. 17 shows an example in which the air-conditioning control device 28 of the air conditioner 9 is not connected to the CAN in FIG. 16 as in FIGS. 13 and 15 described above. However, in this case, the main control device 8 is not provided, and the engine control device 34 fulfills its role.
Further, a sensor for detecting the operation amount of the accelerator 36A is directly connected to the engine control device 34, and a sensor for detecting the operation state of the brake 36B and a sensor for detecting the shift position of the shift lever 36C are directly connected to the transmission control device 46.

Here, reference numeral 46 denotes a transmission control device for controlling the continuously variable transmission 6, which is connected to the CAN. When increasing the number of revolutions of the fuel engine 42 to increase the power generation amount of the generator 43, the transmission control device 46 controls the speed ratio to control the vehicle speed to be constant.

Further, the inventions other than the first to third aspects are based on a pure electric vehicle (P) having no generator as shown in FIG.
It is also effective for EV). In this figure, the same reference numerals in FIGS. 1 to 5 perform the same or similar functions. In this case, the traveling motor 3 is connected to the vehicle-mounted battery 5 through the motor control inverter 3A, and the motor control system 37 Is building. There is no special power generation system (however, charging may be performed by the regenerative current of the traveling motor 3), so that power generation-related control is not performed. Is calculated and transmitted on the CAN. As a result, power control related to the air conditioner 9 can be realized in the same manner as in the case of the above-described hybrid vehicle. FIG. 19 shows an example in which the air-conditioning control device 28 of the air-conditioning apparatus 9 is not connected to the CAN in FIG. 18 similarly to FIGS. 13, 15, and 17 described above.

Further, various current values and control signals in the embodiments can be transmitted by various communication methods of serial communication, parallel communication, analog communication, digital communication, or switch signal. It is possible. It goes without saying that the present invention can be realized even in a communication system that does not use CAN.

Further, in addition to the power control as in the above-described embodiment, when the discharge current value from the vehicle-mounted battery 5 becomes larger than a predetermined allowable discharge current value, the main controller 8 controls the air circulation in the vehicle compartment. By forcibly switching from the outside air introduction mode to the inside air circulation mode, the cooling load in the vehicle compartment may be reduced. In that case, if the window is open, it may be forcibly closed, and in those cases, the passenger is notified of the operation by voice or indicator display, and these controls are disabled by manual switching. You may be able to.

[0093]

As described in detail above, according to the vehicle air conditioning system of the first aspect of the present invention, the vehicle is provided with a power storage means and a power generation means for charging the power storage means. An electric compressor driven by power supply from the control unit, control means for controlling the operation of the electric compressor, and current detection means for detecting a charging current value to the power storage means, wherein the control means comprises the current detection means Based on the detected charging current value to the power storage means, when the charging current value falls below a predetermined set value, the operating frequency of the electric compressor is gradually reduced, so that the power storage means When the charging current value falls below the set value, it becomes possible to reduce the power consumption of the electric compressor and secure charging of the power storage means.

As a result, it is prevented that the power storage means is not charged due to the power consumption of the electric compressor, and the amount of power stored in the power storage means is reduced, or the power is completely discharged, resulting in running failure and running impairment. The inconvenience can be effectively eliminated. In particular, in this case, the control means gradually lowers the operating frequency of the electric compressor, so that the inconvenience of a sudden decrease in the air conditioning capacity is also eliminated, and it is possible to maintain the most comfortable air conditioning in the passenger compartment as much as possible. It is what becomes.

According to the second aspect of the present invention, in addition to the above, when the charging current value rises to a predetermined return value higher than the set value, the control means further controls the electric compressor. Since the lowering control of the operating frequency is stopped, the lowering control of the operating frequency of the electric compressor accompanying the lowering of the charging current value to the power storage means is stopped early,
Thus, it is possible to minimize a decrease in the cabin air conditioning capacity.

[0096] According to the air conditioning system for a vehicle of the third aspect, the present invention is used in a vehicle equipped with a power storage means and a power generation means for charging the power storage means, and is driven by power supply from the power storage means. An electric compressor, control means for controlling the operation of the electric compressor, and current detecting means for detecting a charging current value to the power storage means, wherein the control means controls the power storage means detected by the current detection means. Based on the charging current value, when the charging current value falls below a predetermined set value, the operating frequency of the electric compressor is controlled such that the charging current value rises to a predetermined return value higher than the set value. On the other hand, when the value of the charging current to the power storage means falls below the set value, the power consumption of the electric compressor can be reduced to secure the charging of the power storage means.

As a result, it is prevented that the power storage means is not charged due to the power consumption of the electric compressor, and the amount of power stored in the power storage means is reduced, or the power is completely discharged, resulting in a running failure and a running failure. The inconvenience can be effectively eliminated. In particular, in this case, the control means controls the operating frequency of the electric compressor so that the charging current value rises to a predetermined reset value higher than the set value. This makes it possible to shorten the period during which the performance is reduced as short as possible and to promptly return to more comfortable vehicle interior air conditioning.

According to the vehicle air conditioning system of the fourth aspect, an electric compressor used for an automobile having a power storage means and driven by power supply from the power storage means, and a control for controlling the operation of the electric compressor. Means,
Current detection means for detecting a discharge current value from the power storage means, wherein the control means sets the discharge current value to a predetermined value based on the discharge current value from the power storage means detected by the current detection means. When the discharge current value exceeds the set value, it is possible to reduce the power consumption of the electric compressor. it can.

Thus, it is possible to solve the problem that the amount of power stored in the power storage means is reduced due to the power consumption of the electric compressor, or the running of the vehicle is incomplete and the running becomes inoperable and the running becomes impossible. In particular, in this case, the control means gradually lowers the operating frequency of the electric compressor, so that the inconvenience of a sudden decrease in the air conditioning capacity is also eliminated, and it is possible to maintain the most comfortable air conditioning in the passenger compartment as much as possible. Becomes Further, under a situation where the running load is light, it is possible to discharge the electric storage means to the set value of the discharge current value to maximize the air-conditioning capacity, thereby realizing even more comfortable air conditioning in the vehicle interior. It is.

According to a fifth aspect of the present invention, in addition to the fourth aspect, the control means is configured to control the electric motor when the discharge current value decreases to a predetermined return value lower than the set value. Since the control for lowering the operating frequency of the compressor is stopped, the control for lowering the operating frequency of the electric compressor due to an increase in the discharge current value from the power storage means can be stopped early to minimize the reduction in the air conditioning capacity of the vehicle interior. That is what you can do.

According to the air conditioning system for a vehicle of the present invention, the electric compressor is used for an automobile having a power storage means and is driven by power supply from the power storage means, and a control for controlling the operation of the electric compressor. Means,
Current detection means for detecting a discharge current value from the power storage means, wherein the control means sets the discharge current value to a predetermined value based on the discharge current value from the power storage means detected by the current detection means. If the discharge current value exceeds the set value, the operating frequency of the electric compressor is controlled so that the discharge current value decreases to a predetermined return value lower than the set value. Can reduce the discharge by controlling the operating frequency of the electric compressor.

As a result, it is possible to solve the problem that the amount of power stored in the power storage means is reduced due to the power consumption of the electric compressor, or the inconvenience of insufficient running or inability to run due to complete discharge. In particular, in this case, the control means controls the operating frequency of the electric compressor so that the discharge current value decreases to a predetermined return value lower than the set value. This makes it possible to shorten the period during which the performance is reduced as short as possible and to promptly return to more comfortable vehicle interior air conditioning. Further, under a situation where the running load is light, it is possible to discharge the electric storage means to the set value of the discharge current value to maximize the air-conditioning capacity, thereby realizing even more comfortable air conditioning in the vehicle interior. It is.

According to the seventh aspect of the present invention, there is provided an electric air-conditioning system for use in an automobile having an electric storage means, the electric compressor being driven by power supply from the electric storage means, and a control for controlling the operation of the electric compressor. Means for increasing the power consumption of the electric compressor, based on an allowable discharge increase amount permitted by the power storage means, and controlling the electric motor within a range of the allowable discharge increase amount. Since the power consumption of the compressor is increased, the increase in the power consumption of the electric compressor is limited to at least a range of an allowable increase in discharge of the power storage means.

As a result, it is possible to solve the problem that the amount of power stored in the power storage means is reduced due to the power consumption of the electric compressor, or the running of the vehicle is incomplete and the running becomes inoperable or impossible. Further, in a situation where the traveling load is light, the power storage means can be discharged within an allowable range to increase the air-conditioning capacity as much as possible, so that a more comfortable vehicle air-conditioning can be realized.

According to the air-conditioning system for an automobile of the invention of claim 8, in addition to the above-mentioned inventions, the automobile is an electric automobile which is driven by a traveling motor supplied from the power storage means. It is possible to effectively eliminate the adverse effect of the operation of the electric compressor on the operation of the electric vehicle while smoothly performing the air conditioning in the vehicle interior.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a hybrid vehicle as an embodiment to which a vehicle air conditioning system of the present invention is applied.

FIG. 2 is a configuration diagram of a drive system of the automobile shown in FIG.

FIG. 3 is a configuration diagram of an air conditioner included in the automotive air conditioning system of the present invention.

FIG. 4 is a refrigerant circuit diagram of the air conditioner of FIG. 3;

FIG. 5 is a block diagram of a vehicle control system in which the vehicle air conditioning system of the present invention is applied to a hybrid vehicle.

FIG. 6 is a diagram illustrating a change in a charging current value of a vehicle-mounted battery and a change in an operating frequency of a compressor motor for explaining power control by the automotive air conditioning system of the present invention.

FIG. 7 is a diagram illustrating a change in a charging current value to a vehicle-mounted battery and a change in an operating frequency of a compressor motor for explaining another electric power control by the automotive air conditioning system of the present invention.

FIG. 8 is a diagram illustrating a change in a charging current value to a vehicle-mounted battery and a change in an operating frequency of a compressor motor for explaining yet another power control by the automotive air conditioning system of the present invention.

FIG. 9 is a diagram illustrating a change in a discharge current value from a vehicle-mounted battery and a change in an operating frequency of a compressor motor for explaining still another power control by the vehicle air conditioning system of the present invention.

FIG. 10 is a diagram illustrating a change in a discharge current value from a vehicle-mounted battery and a change in an operating frequency of a compressor motor for explaining still another power control by the vehicle air conditioning system of the present invention.

FIG. 11 is a diagram illustrating a change in a discharge current value from a vehicle-mounted battery and a change in an operating frequency of a compressor motor for explaining still another power control by the automotive air conditioning system of the present invention.

FIG. 12 is a flowchart relating to still another power control by the automotive air conditioning system of the present invention.

FIG. 13 is a block diagram of a control system of the vehicle corresponding to FIG. 5 when the control device for air conditioning is not connected to CAN.

FIG. 14 is a block diagram of a vehicle control system when the vehicle air conditioning system of the present invention is applied to a fuel cell vehicle.

FIG. 15 is a block diagram of a control system of the vehicle corresponding to FIG. 14 when the air-conditioning control device is not connected to the CAN.

FIG. 16 is a block diagram of a vehicle control system when the vehicle air conditioning system of the present invention is applied to a normal fuel engine vehicle.

17 is a block diagram of a control system of the vehicle corresponding to FIG. 16 when the air-conditioning control device is not connected to the CAN.

FIG. 18 is a block diagram of a vehicle control system when the vehicle air conditioning system of the present invention is applied to a pure electric vehicle.

19 is a block diagram of a control system of the vehicle corresponding to FIG. 18 when the air conditioning control device is not connected to CAN.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automobile 2 Engine 3 Running motor 4 Generator 5 In-vehicle battery 8 Main controller 9 Air conditioner 10 Compressor 11 Compressor motor 12 Temperature sensor 13 Condenser 15 Outdoor blower 17 Liquid receiver 18 Expansion valve 19 Evaporator 21 Indoor blower 28 Air conditioning controller 32 Battery controller 33 Heater 37 Motor control system 41 Fuel cell 43 Generator CT1 Current transformer

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Mamoru Kubo 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Shigeharu Sasaki 2-5-chome Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. (72) Inventor Kazuhisa Otagaki 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. No. Sanyo Electric Air Conditioning Co., Ltd. (72) Inventor Kenzo Watanabe Inside Fuji Heavy Industries, Ltd. 1-7-2 Nishi Shinjuku, Shinjuku-ku, Tokyo

Claims (8)

[Claims] 1. An electric compressor, which is used in an automobile including a power storage means and a power generation means for charging the power storage means, and is driven by power supply from the power storage means, and controls operation of the electric compressor. Control means, and current detection means for detecting a charging current value to the power storage means, wherein the control means determines the charging current value based on a charging current value to the power storage means detected by the current detection means. An air conditioning system for an automobile, wherein the operating frequency of the electric compressor is gradually reduced when the value falls below a predetermined set value. 2. The control unit according to claim 1, wherein when the charging current value rises to a predetermined return value higher than the set value, the control means stops the lowering control of the operating frequency of the electric compressor. Automotive air conditioning system. 3. An electric compressor, which is used in a vehicle including a power storage means and a power generation means for charging the power storage means, and is driven by power supply from the power storage means, and controls operation of the electric compressor. Control means, and current detection means for detecting a charging current value to the power storage means, wherein the control means determines the charging current value based on a charging current value to the power storage means detected by the current detection means. An air conditioning system for an automobile, wherein the operating frequency of the electric compressor is controlled such that when the charge current value falls below a predetermined set value, the charge current value increases to a predetermined return value higher than the set value. 4. An electric compressor which is used in an automobile having a power storage means and is driven by power supply from the power storage means, a control means for controlling the operation of the electric compressor, and a discharge current value from the power storage means. And a current detection unit for detecting, based on a discharge current value from the power storage unit detected by the current detection unit, when the discharge current value exceeds a predetermined set value, the control unit of the electric compressor An air conditioning system for automobiles, wherein the operating frequency is gradually reduced. 5. The control means according to claim 4, wherein said control means stops the control for lowering the operating frequency of said electric compressor when said discharge current value drops to a predetermined return value lower than said set value. Automotive air conditioning system. 6. An electric compressor which is used in an automobile having a power storage means and is driven by power supply from the power storage means, a control means for controlling the operation of the electric compressor, and a discharge current value from the power storage means. A current detection unit for detecting, based on a discharge current value from the power storage unit detected by the current detection unit, when the discharge current value exceeds a predetermined set value, the discharge current value The operating frequency of the electric compressor is controlled so that the air conditioner decreases to a predetermined return value lower than the set value. 7. An electric compressor used for an automobile having a power storage means, the electric compressor being driven by power supply from the power storage means, and a control means for controlling an operation of the electric compressor. When the operation for increasing the power consumption of the compressor is performed, the power consumption of the electric compressor is increased within a range of the allowable discharge increase based on the allowable discharge increase allowed by the power storage means. Automotive air conditioning system. 8. The vehicle according to claim 1, wherein the vehicle is an electric vehicle that runs by a running motor supplied with power from the power storage means.
The automotive air conditioning system according to claim 5, 6 or 7.