JP2002067670A - Air conditioning device for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioning device for an automobile which is capable of realizing a comfortable air conditioning in a car cabin by largely reducing rotary noise caused by a compressor motor and an indoor blower motor. SOLUTION: This air conditioning device comprises the compressor motor 11 to drive a compressor 10, an indoor blower 21 to blow air heat-exchanged by an evaporator 19, the indoor blower motor 22 to drive the indoor blower 21, and a control device 28 to control the operation of the compressor motor 11 and the indoor blower motor 22. The control device 28 determines the operation frequency of the compressor motor 11 in accordance with the temperature of the air blown into the car cabin by the indoor blower 21, while it controls the number of revolutions of the indoor blower motor 22 on the basis of the determined operation frequency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle for suitably performing air conditioning in a passenger compartment.

[0002]

2. Description of the Related Art An air conditioner used in a conventional fuel-engine vehicle, for example, controls air conditioning in a vehicle compartment when an air-conditioning switch provided on an operation panel is turned on.
The compressor is driven by the 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 cabin by an outdoor blower driven by an electric motor and rotated at a high speed to radiate heat and condense and liquefy. Then, it flows into an indoor heat exchanger provided in the vehicle interior. The liquid refrigerant evaporates there and at that time absorbs heat from the surroundings to exert a cooling function, and the indoor blower exchanges heat with the air in the passenger compartment to cool the passenger compartment and perform air conditioning. A refrigeration circuit that repeats the refrigeration cycle returning to the above is configured.

The air conditioner is provided with a control device. When the vehicle interior is cooled to a predetermined temperature set by a temperature setting volume, the control device is detected by a temperature sensor mounted in the vehicle interior. The rotation of the compressor is turned off based on the temperature. And the compressor is OF
When F, the interior of the vehicle is no longer cooled, so the temperature in the interior of the vehicle gradually increases. When the temperature in the vehicle interior rises and reaches a predetermined temperature set by the temperature setting volume, a temperature sensor mounted in the vehicle interior detects this and the control device turns on the compressor to cool the vehicle interior. The control device repeats this to maintain the vehicle interior at a predetermined set temperature.

Since the compressor is rotationally driven by the engine, the compressor rotates at a high speed when the vehicle is running at a high speed, and the compressor also rotates at a low speed when the engine is running at a low speed such as when the vehicle is running at a low speed or at a stop. ing. That is, the compressor rotates in proportion to the engine speed. Therefore, the air conditioner has been configured to have the ability to cool the vehicle interior to a predetermined set temperature even when the compressor is rotating at a low speed such as when the vehicle is running at a low speed or stopped.

[0005]

However, when the automobile is driven, the compressor is driven by the engine, and the rotation frequency of the compressor is proportional to the rotation speed of the engine. Therefore, the rotation of the compressor cannot be controlled, and the compressor rotates at a high speed when the engine rotates at a high speed. Therefore, the noise of the compressor increases, and the performance of the compressor can be controlled only by ON-OFF.

[0006] Further, the rotation speed of the indoor blower motor remains fixed and does not change. For this reason, when the temperature in the vehicle interior is higher than the set temperature, the indoor blower motor rotates at a high speed, so that there is a problem that the noise is large and comfortable vehicle interior air conditioning cannot be realized.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and it is possible to realize a comfortable vehicle interior air conditioning by greatly reducing the rotational noise between a compressor motor and an indoor blower motor. It is an object of the present invention to provide a vehicle air conditioner that can be used.

[0008]

The vehicle air conditioner according to the first aspect of the present invention is for air-conditioning the interior of a vehicle, and includes a compressor and an outdoor heat exchanger provided outside the vehicle. A refrigeration cycle including an indoor heat exchanger and the like provided in the cabin of the automobile, a compressor motor for driving a compressor, and an indoor blower that blows air that has exchanged heat with the indoor heat exchanger into the cabin. An indoor blower motor for driving the indoor blower, and a control device for controlling operation of the compressor motor and the indoor blower motor, the control device based on a temperature of air blown into the vehicle interior by the indoor blower. And determines the operating frequency of the compressor motor, and controls the rotational speed of the indoor blower motor based on the determined operating frequency. .

Further, in addition to the above, the air conditioner for a vehicle according to the present invention further comprises an operating frequency of the compressor motor based on a deviation between a temperature of air blown into the vehicle interior by the indoor blower and a set temperature in the vehicle interior. And controlling the voltage applied to the indoor blower motor based on the determined operating frequency.

According to a third aspect of the present invention, there is provided an air conditioner for a vehicle according to the first or second aspect, wherein the vehicle is an electric vehicle driven by a driving motor supplied from a vehicle-mounted battery. The indoor blower motor is powered by the on-board battery.

According to the present invention, the compressor and the outdoor heat exchanger provided outside the vehicle compartment of the automobile, the refrigeration cycle including the indoor heat exchanger provided inside the vehicle interior of the automobile, and the compressor are driven. Motor, an indoor blower for blowing air exchanged with the indoor heat exchanger into the vehicle interior, an indoor blower motor for driving the indoor blower, and a control device for controlling the operation of the compressor motor and the indoor blower motor The control device determines the operating frequency of the compressor motor based on the temperature of the air blown into the vehicle interior by the indoor blower, and determines the rotation speed of the indoor blower motor based on the determined operating frequency. Because it is controlled, the compressor and the room are always needed as needed based on the temperature of the air blown into the cabin. It is possible to rotate the blower fan. This makes it possible to greatly improve the efficiency of electric energy. Therefore, the capacity control of the compressor and the air volume control of the indoor blower can be efficiently performed, so that noise can be reduced and comfort can be greatly improved.

According to a second aspect of the present invention, in addition to the above, the operating frequency of the compressor motor is determined based on a deviation between the temperature of the air blown into the vehicle interior by the indoor blower and the set temperature in the vehicle interior. Since the applied voltage to the indoor blower motor is controlled based on the determined operation frequency, for example, when the deviation between the temperature of the air blown into the vehicle interior and the set temperature in the vehicle interior is small, the compressor motor The increase in the operating frequency and the rotation speed of the indoor blower motor can be small. This makes it possible to significantly reduce the rotational noise between the compressor motor and the indoor blower motor. Therefore, comfortable vehicle air conditioning can be realized by controlling the capacity of the compressor motor by controlling the operation wave number and controlling the air flow of the indoor blower determined based on the control.

[0013] The invention of claim 3 is claim 1 or claim 2.
In addition, the vehicle is an electric vehicle running with a running motor powered by a vehicle-mounted battery, and the compressor motor and the indoor blower motor are configured to be powered by the vehicle-mounted battery. Since the compressor was driven by the engine, the rotation of the compressor was ON-OFF only and the rotation speed could not be controlled.However, when applied to an electric vehicle equipped with a battery for driving a traction motor,
Since the compressor motor can be driven using the vehicle-mounted battery, it is possible to smoothly control the compressor motor and the indoor blower motor. This makes it possible to calculate the operating frequency of the compressor motor and the rotation speed of the indoor blower motor from the deviation between the temperature of the air blown into the vehicle interior and the set temperature in the vehicle interior. Therefore, comfortable vehicle air conditioning can be realized by controlling the capacity of the compressor motor by controlling the operation wave number and controlling the air flow of the indoor blower determined based on the control.

[0014]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of the air conditioner 9 of the present invention attached to the automobile 1, FIG. 2 is a configuration diagram of a drive system of the automobile 1, FIG. 3 is a configuration diagram of the air conditioner 9 of the present invention, and FIG. Are respectively shown circuit diagrams of the air conditioner 9 of FIG.

In FIG. 1, reference numeral 1 denotes an automobile (a hybrid car (HEV) in the embodiment). The automobile 1 has an internal combustion engine (engine) 2 and an air conditioner 9 having a control device 28 mounted thereon. The air conditioner 9 performs air conditioning such as cooling, heating, and dehumidification in the cabin of the automobile 1, and includes a compressor 1 including a rotary compressor or the like.
The pipe 10A on the discharge side of 0 is connected to a condenser 13 as an outdoor heat exchanger, and the outlet side of the condenser 13 is connected to a liquid receiver 17. The pipe 17A on the outlet side 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). Reference numeral 33 denotes a heater which is used when the number of rotations is the minimum (including when the motor is stopped) or when it is desired to further warm the vehicle interior.

The compressor 10, the condenser 13, the engine 2 and the like are provided outside the vehicle compartment where no one gets on the vehicle, and the evaporator 19 is installed inside the vehicle room where a person gets on the vehicle. The compressor 10 is provided with a compressor motor 11, and the compressor 10 is driven by the compressor motor 11. The condenser 13 has an outdoor blower 15
The 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 a refrigerant discharge temperature is provided on a refrigerant discharge side of the compressor 10, and a temperature sensor 14 for detecting a refrigerant outlet temperature is provided on a refrigerant outlet side of the condenser 13. And evaporator 1
9 is provided with a temperature sensor 20 for detecting a refrigerant outlet temperature on the refrigerant outlet side, and these are connected to a control device 28. Reference numeral 23 denotes a temperature sensor for detecting the temperature of air blown into the vehicle compartment from the indoor blower 21, and the temperature sensor 23 is also connected to the control device 28. Also,
An outdoor blower motor 16, an indoor blower motor 22, and a temperature setting volume 24 provided on an air conditioning operation panel in the passenger compartment.
Alternatively, the air conditioning switch 25 and the like are also connected to the control device 28. 28A is a control circuit board 28A provided with a control circuit of the control device 28.

Here, the control device 28 controls the PAM (Puls
e Amplitude Modulation: Pulse Amplitude Modulation)
V) is increased to a desired voltage, and is converted into a compressor motor 11 drive voltage by an inverter to rotate the compressor 10.
However, a hybrid IC (HIC) (not shown), which is stored as one module, becomes extremely hot. Therefore, the HIC is attached to a cooling box 29 described later.

The control device 28 includes a compressor 10
AUTO which rotates in proportion to the rotation speed of the air blower, and a blower fan switch 26 which manually changes the rotation speed of the indoor blower 21 in three stages of 1.2.3 at a fixed rate and determines the amount of air blown into the vehicle interior. It is connected. In addition, 25A
Reference numeral 27 denotes an operation LED which is turned on when the compressor 10 is operating, and reference numeral 27 denotes a battery (DC 12 V) which is a power source for operating a headlight (not shown), a direction indicator, a radio, a control device 28 and the like.

As shown in FIG. 2, the automobile 1 is provided with an engine 2, a traveling motor 3 and a generator 4.
The traveling motor 3 is connected to a vehicle-mounted battery (DC 230 V) 5 via a motor control inverter 3A, and the generator 4 is connected to the vehicle-mounted battery 5 via a power generation inverter 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 combines the rotation of the traveling motor 3 and the generator 4, and the rotation of the engine 2 and the traveling motor 3 by one. , The continuously variable transmission 6 described later is driven. Note that the traveling motor 3 and the generator 4 and the engine 2
And the rotation of the traveling motor 3 are combined into one, and the continuously variable transmission 6
Is a well-known technique, and a detailed description thereof will be omitted.

The running motor 3 is mainly used when the engine 2 starts with low gasoline efficiency or at low speed, and is used more than the driving force of the engine 2. As the vehicle shifts to high speed with high gasoline efficiency, the engine 2 mainly operates. Engine 2
At the time of initiative, the electric power generated by the generator 4
And the battery 27 is charged. The power generator 4 is used as a starter when the engine 2 is started, in addition to the power generating action 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 continuously variable transmission 6 driven by the engine 2 or the traveling motor 3
The technique of rotating the wheels 7 to run the automobile 1 is a well-known technique in the related art, and a detailed description thereof will be omitted.

Here, the main control unit 8 operates the PAM as described above.
, The voltage of the in-vehicle battery 5 (DC 230 V) is boosted to a predetermined voltage, converted into a drive voltage for the drive motor 3 by an inverter (motor control inverter 3A), and the drive motor 3 is rotated.
The HIC (not shown) in which the HIC and the inverter are stored as one module becomes extremely hot.
Therefore, the HIC is attached to a cooling box 29 described later.

The control device 28 is connected to a main control circuit board 8A as shown in FIG. 3, and the main control circuit board 8A generates a compressor 10 drive signal. Then, the controller 28 controls the compressor motor 11 obtained from the main controller 8.
, The rotor position of the compressor motor 11 is detected from the induced voltage, and the microcomputer controls the rotation of the compressor motor 11 with an inverter that creates the next excitation pattern. Note that a temperature sensor 32A is attached to the main control circuit board 8A, and the temperature sensor 32A is connected to the control device 28. The vehicle-mounted battery 5, the compressor motor 11, and the like are connected to the main control circuit board 8A.

FIG. 5 shows a cooling box 29. The cooling box 29 is attached to the outside of the passenger compartment, and has the control circuit board 2 of the air-conditioning control device 28 therein.
8A and a main control circuit board 8A of the main control device 8 for controlling the drive system of the automobile 1 are built in. Cooling box 2
Reference numeral 9 denotes a housing 29B having an opening on one side, and a fixing plate 29A which closes the opening of the housing 29B and is slightly larger than the opening. The fixing plate 29A is made of a metal having good thermal conductivity, and the fixing plate 29A is provided with a plurality of heat exchange fins 30 having a predetermined thickness, a predetermined width, and a predetermined length. The heat exchange fins 30 are provided on the opposite surface of the housing 29B, and extend to the side away from the housing 29B.

The fixed plate 29A has a predetermined thickness, and the fixed plate 29A is provided with a cooling water circuit 31 through which cooling water (such as antifreeze) flows as cooling means. The cooling water circuit 31 is provided in the fixed plate 29A, and the cooling water circuit 31 is provided with a circulation motor 32. Then, the control circuit board 28 is fixed to the fixing plate 29A.
A and the back surfaces of both HICs provided on the main control circuit board 8A are tightly fixed. The cooling water circuit 31 is connected to a water-cooled radiator (not shown) provided outside the vehicle compartment and provided with a cooling fan, and the radiator radiates the cooling water in the cooling water circuit 31. The circulation motor 32 is connected to the control device 28.

When the vehicle 1 travels, the HIC provided on the main control circuit board 8A self-heats and the temperature rises. However, the heat exchange fins 30 are cooled by the wind generated by the traveling of the vehicle 1, thereby reducing the HIC. Heat is released and cooled. If the temperature of the HIC provided on the main control circuit board 8A rises due to self-heating even if the temperature is radiated by the wind of the automobile 1 and the temperature rises above the predetermined temperature, the controller 28 detects Is detected and the circulation motor 32 is driven to circulate the cooling water in the cooling water circuit 31.

As a result, the cooling water draws heat from the fixed plate 29A to cool the HIC of the main control device 8 which is tightly fixed to the fixed plate 29A. Further, since the HIC of the air-conditioning control device 28 is also tightly fixed to the fixing plate 29A, the HIC of the air-conditioning control device 28 is also cooled, thereby preventing both HICs from becoming hot and being damaged. be able to. That is, the cooling water circuit 31 is provided in the fixed plate 29A of the cooling box 29, and the cooling water is circulated by the circulation motor 32 provided in the cooling water circuit 31. As a result, the HIC provided on the control circuit board 28A and the HIC provided on the main control circuit board 8A are cooled to prevent them from becoming hot and damaged.

Next, the operation of the air conditioner 9 for the vehicle 1 will be described. Hereinafter, an automobile 1 is an electric automobile not equipped with the engine 2 (an automobile in which the engine 2 is removed from FIG. 1).
Will be described. The compressor motor 11 and the outdoor blower motor 16 are supplied with power from the vehicle-mounted battery 5, and the vehicle-mounted battery 5 and the battery 27 are fully charged. When the air conditioner 9 is operated, the control device 28 controls the rotation speed of the compressor motor 11 to operate the compressor 10. As a result, the high-temperature and high-pressure gas refrigerant compressed and discharged by the compressor 10 flows into the condenser 13 from the pipe 10A, and the outdoor blower 15
The cooling of the condenser 13 outside the vehicle cabin by the air blowing (FIG. 1)
Hollow arrow). The gas refrigerant that has flowed into the condenser 13 radiates heat there, is condensed and liquefied, and then flows into the liquid receiver 17. The liquid refrigerant once stored in the 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, absorbs heat from the surroundings at that time, exhibits a cooling effect, and also cools the vehicle interior by blowing air from the indoor blower 21 to perform air conditioning (FIG. 1). Arrow). Evaporator 1
After leaving the refrigerant 9, the refrigerant enters an accumulator (not shown), where the unevaporated refrigerant is separated into gas and liquid.
The refrigeration cycle which is compressed and discharged at is repeated. The technique for air-conditioning the vehicle interior by the compressor 10 is a well-known technique in the related art, and thus a detailed description is omitted.

Here, 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).
Calculation is performed to determine a target frequency (F). Δe = e-em (1) In the equation (1), e = (set temperature = temperature set by the temperature setting volume 24) − (outlet port 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: target frequency variation calculation value, K
p: proportional constant, Ki: integral constant. F = ΔF + Fm (3) In equation (3), Fm indicates the previous target frequency.

The target frequency obtained from the above equation is applied to the following equation to obtain a blower fan motor (the indoor blower motor 2).
The application voltage of 2) is subjected to PWM control (adjustment of the applied voltage), and the air volume of the blower fan fan (the indoor blower 21) is adjusted. PWM duty = (MAX duty−MIN duty) / (MAX frequency−MIN frequency) × (target frequency−MIN frequency) + N IND duty (4) In the equation (4), MAX duty: blower fan PW
M control maximum duty, MIN duty: blower fan P
WM control minimum duty, MAX frequency: maximum target frequency, MIN frequency: minimum target frequency.

That is, the control device 28 determines the operating frequency of the compressor motor 11 based on the temperature of the air blown into the vehicle interior by the indoor blower 21. Since the rotation speed of the indoor blower motor 22 is controlled based on the determined operating frequency of the compressor motor 11, the temperature of the air in the passenger compartment is slightly lower than the temperature set by the temperature setting volume 24. If high,
The operating frequency of the compressor motor 11 and the rotation speed of the indoor blower motor 22 are slightly increased. As a result, the rotational noise between the compressor motor 11 and the indoor blower motor 22 does not become extremely large but only slightly increases.

When the temperature of the air in the vehicle compartment is 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. The air-conditioning of the vehicle can be rapidly performed, and the air-conditioning can be comfortably performed. 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 air conditioning in the vehicle interior can be performed by controlling the capacity of the compressor motor 11 by controlling the operation wave number and by controlling the slight air volume of the indoor blower 21 determined based on the control.

As described above, the control device 28 controls the operating frequency of the compressor motor 11 by the inverter based on the difference between the outlet temperature of the evaporator 19 and the set temperature.
Can be controlled so that the rotation speed of the compressor motor 11 becomes small and approaches zero if the temperature deviation is eliminated. 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, another embodiment of the air conditioner 9 for the automobile 1 will be described with reference to FIG. In this case, the automobile 1 is large, and evaporators 19 and 59 are provided before and after the cabin, respectively, and these evaporators 19 and 59 are configured so that the entire cabin can be suitably air-conditioned. That is, the automobile 1 is provided with an annular refrigerant circuit similar to that described above, and branches off from a pipe 17A on the outlet side of the liquid receiver 17 of the refrigerant circuit and is connected to an expansion valve 58 as a pressure reducing device.
Is connected to an evaporator 59 as an indoor heat exchanger (cooler).

The outlet side of the evaporator 59 is connected to a pipe 10B on the suction side of the compressor 10 to form an annular refrigeration cycle (refrigerant circuit). The evaporator 59 is provided with a temperature sensor 60, an indoor blower 61, an indoor blower motor 62, and a temperature sensor 63, and the temperature sensor 60, the indoor blower motor 62, and the temperature sensor 63 are connected to the control device 28, respectively. That is, the expansion valve 58 and the evaporator 59 are provided in parallel with the expansion valve 18 and the evaporator 19.

The pipe 17A on the outlet side of the liquid receiver 17
The evaporator 59 branched from the controller is also controlled by the control device 28 to air-condition the interior of the vehicle compartment of the large-sized vehicle as described above. Also in this case, when the temperature of the air in the cabin is slightly higher than the set temperature, the increase in the operating frequency of the compressor motor 11 and the number of revolutions of the indoor blower motors 22 and 62 may be small, and the temperature of the air blown into the cabin may be small. When the deviation between the vehicle temperature and the set temperature in the vehicle compartment is small, the increase in the operating frequency of the compressor motor 11 and the rotation speed of the indoor blower motors 22 and 26 can be small. Thereby, when the temperature is slightly higher than the set temperature in the vehicle interior, the compressor motor and the 11 indoor blower motor 2
It becomes possible to significantly reduce the rotational noise between the first and second motors 62 and 62. In addition, comfortable vehicle air conditioning can be realized by controlling the capacity of the compressor motor 11 by controlling the operating wave number and controlling the air flow of the indoor blowers 21 and 61 determined based on the control.

In the embodiment, the vehicle 1 is an electric vehicle (E
V), but the present invention is not limited to this.
The air conditioner 9 for a vehicle 1 of the present invention may be used for an electric vehicle (EV), a fuel cell vehicle (FCEV), and the like.

Further, the temperature sensor 20 detects the refrigerant outlet temperature of the evaporator 19, and the temperature sensor 23 detects the temperature of the air blown into the passenger compartment from the indoor blower 21. However, the present invention is not limited to this. The temperature of the refrigerant outlet side of the evaporator 19 and the temperature of the air blown by the indoor blower 21 are substantially the same. Sensor 23
However, the cost may be reduced.

[0042]

As described above in detail, according to the present invention, a refrigeration system comprising a compressor and an outdoor heat exchanger provided outside a vehicle compartment of an automobile, an indoor heat exchanger provided inside a vehicle interior of an automobile, and the like. A cycle, a compressor motor for driving a compressor, an indoor blower for blowing air heat-exchanged with the indoor heat exchanger into a vehicle interior, an indoor blower motor for driving the indoor blower, a compressor motor and an indoor blower motor A control device for controlling the operation of the compressor, the control device determines the operating frequency of the compressor motor based on the temperature of the air blown into the vehicle interior by the indoor blower, based on the determined operating frequency Because the number of rotations of the indoor blower motor is controlled, it is always necessary based on the temperature of the air blown into the cabin. Compressors and an indoor blower fan can be rotated. This makes it possible to greatly improve the efficiency of electric energy. Therefore, since the capacity control of the compressor and the air volume control of the indoor blower can be efficiently performed, noise can be reduced,
The comfort can be greatly improved.

According to a second aspect of the present invention, in addition to the above, the operating frequency of the compressor motor is determined based on the deviation between the temperature of the air blown into the vehicle interior by the indoor blower and the set temperature in the vehicle interior. Since the applied voltage to the indoor blower motor is controlled based on the determined operation frequency, for example, when the deviation between the temperature of the air blown into the vehicle interior and the set temperature in the vehicle interior is small, the compressor motor The increase in the operating frequency and the rotation speed of the indoor blower motor can be small. This makes it possible to significantly reduce the rotational noise between the compressor motor and the indoor blower motor. Therefore, comfortable vehicle air conditioning can be realized by controlling the capacity of the compressor motor by controlling the operation wave number and controlling the air flow of the indoor blower determined based on the control.

According to a third aspect of the present invention, in addition to the first or second aspect, the vehicle is an electric vehicle that runs on a running motor powered by a vehicle-mounted battery, and includes a compressor motor and an indoor blower motor. For example, in a conventional engine vehicle, the compressor was driven by the engine, and the rotational speed of the compressor was ON / OFF only, and the rotational speed could not be controlled. When applied to an electric vehicle equipped with a battery for driving the motor, the compressor motor can be driven using the vehicle-mounted battery, so that the compressor motor and the indoor blower motor can be controlled smoothly. It becomes possible.
This makes it possible to calculate the operating frequency of the compressor motor and the rotation speed of the indoor blower motor from the deviation between the temperature of the air blown into the vehicle interior and the set temperature in the vehicle interior. Therefore, comfortable vehicle air conditioning can be realized by controlling the capacity of the compressor motor by controlling the operation wave number and controlling the air flow of the indoor blower determined based on the control.

[Brief description of the drawings]

FIG. 1 is a block diagram of an air conditioner of the present invention mounted on an automobile.

FIG. 2 is a configuration diagram of a drive system of an automobile.

FIG. 3 is a configuration diagram of an air conditioner of the present invention.

FIG. 4 is a circuit diagram of the air conditioner of the present invention.

FIG. 5 is a vertical sectional side view of the cooling box.

FIG. 6 is a block diagram of another air conditioner attached to an automobile.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automobile 2 Engine 3 Running motor 3A Motor control inverter 4 Generator 4A Power generation inverter 5 In-vehicle battery 8 Main control device 9 Air conditioner 10 Compressor 11 Compressor motor 12 Temperature sensor 13 Condenser 14 Temperature sensor 15 Outdoor blower 16 Outdoor Blower motor 19 Evaporator 20 Temperature sensor 21 Indoor blower 22 Indoor blower motor 23 Temperature sensor 26 Blower fan switch 27 Battery 28 Controller 29 Cooling box 32A Temperature sensor

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B60H 1/22 B60H 1/22 B60L 1/00 B60L 1/00 L (72) Inventor Shigeharu Sasaki Moriguchi, Osaka 2-5-5, Keihan-shi, Ichigo Sanyo Electric Co., Ltd. F-term (reference) 3L011 AC01 5H115 PA05 PG04 PU26 PV09 QA02 QN08 SE03 TO05

Claims (3)

[Claims] 1. An air conditioner for air-conditioning a vehicle interior of a vehicle, comprising: a compressor and an outdoor heat exchanger provided outside the vehicle interior of the vehicle; and an indoor heat exchanger provided inside the vehicle interior of the vehicle. A refrigeration cycle to be performed, a compressor motor for driving the compressor, an indoor blower that blows air that has exchanged heat with the indoor heat exchanger into the vehicle interior, and an indoor blower motor for driving the indoor blower, A control device for controlling the operation of the compressor motor and the indoor blower motor, the control device determines an operating frequency of the compressor motor based on a temperature of air blown into the vehicle interior by the indoor blower. Controlling the number of revolutions of the indoor blower motor based on the determined operating frequency. Use the air conditioner. 2. The control device determines an operating frequency of the compressor motor based on a difference between a temperature of air blown into the vehicle interior by the indoor blower and a set temperature in the vehicle interior, and determines the operating frequency. The vehicle air conditioner according to claim 1, wherein a voltage applied to the indoor blower motor is controlled based on the determined operating frequency. 3. The vehicle according to claim 1, wherein the vehicle is an electric vehicle driven by a driving motor powered by a vehicle-mounted battery, and wherein the compressor motor and the indoor blower motor are powered by the vehicle-mounted battery. An automotive air conditioner according to claim 2.