JP2003127655A - Vehicular air-conditioner device and vehicular air- conditioning control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save power of a vehicular air-conditioning device. SOLUTION: This vehicular air-conditioning device for controlling a blowoff air temperature to a target blowoff temperature by varying a capacity control rate of a capacity control compressor 1 in a refrigerating cycle is provided with a blowoff temperature calculation means 21 for calculating the target blowoff temperature by input from an outside temperature sensor 10, a solar radiation sensor 11, a room temperature sensor 12, and a room temperature setting device 13; a capacity control rate calculation means 22 for calculating the capacity control rate of the capacity control compressor 1 in correspondence with the target blowoff temperature based on the calculated result by the blowoff temperature calculation means 21; an intermittent operation control means 25 for fixing the capacity control rate to a predetermined value and intermittently operating the capacity control compressor 1 when the capacity control rate calculated by the capacity control rate calculation means 22 is smaller than the predetermined value; and a capacity control operation means 24 for conducting capacity control at the capacity control rate in correspondence with the target blowoff temperature and continuously operating the capacity control compressor 1 when the capacity control rate calculated by the capacity control rate calculation means 22 is equal to or larger than the predetermined value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner and a vehicle air conditioning control method for controlling a cooling capacity by changing a capacity control rate of a capacity control compressor.

[0002]

2. Description of the Related Art Conventionally, in a vehicle air conditioner using a capacity control compressor, it is premised on continuous operation of the capacity control compressor, and the capacity control rate of the capacity control compressor ( Hereinafter, the cooling capacity will be changed) to control the cooling capacity, that is, the air conditioning control.

[0003]

However, as shown in FIG. 5, the system coefficient of performance of the refrigerating cycle in the vehicle air-conditioning system (hereinafter sometimes abbreviated as system COP) is, as shown in FIG. Since the air-conditioning control method described above cannot always operate the vehicle air-conditioning system with the highest system COP, there is a problem that sufficient power saving cannot be achieved. Therefore, the present invention provides a vehicle air conditioner and a vehicle air conditioning control method for improving power saving by combining the capacity control rate control and the ON-OFF control of the capacity control compressor.

[0004]

In order to solve the above-mentioned problems, the invention according to claim 1 changes the capacity control rate of the capacity-controlled compressor in the refrigeration cycle so that the air outlet temperature becomes the target outlet temperature. In a vehicle air conditioner to be controlled, a blowout temperature calculating means for calculating a target blowout temperature by input from a room temperature sensor, an outside temperature sensor, a solar radiation sensor, and a temperature setter, and a target blowout based on a calculation result of the blowout temperature calculating means. When the capacity control rate calculation means for calculating the capacity control rate of the capacity control compressor corresponding to the temperature and the capacity control rate calculated by the capacity control rate calculation means are smaller than a predetermined value, the capacity control rate is set to the predetermined value. When the capacity control rate calculated by the capacity control rate calculation means is fixed value or more and the intermittent operation control means for intermittently operating the capacity control compressor is a predetermined value or more, the target blowing A capacity control operation means for continuously operating said capacity control compressor with capacity control by capacity control rate corresponding to the temperature, characterized by comprising a. With this configuration, when the capacity control rate of the capacity control compressor corresponding to the target outlet temperature is smaller than the predetermined value, the capacity control rate is fixed to the predetermined value and the capacity control compressor is operated intermittently. It is possible to obtain the required cooling capacity while reducing the power consumption of the capacity control compressor.

According to a second aspect of the present invention, in the first aspect of the present invention, the acceleration calculating means for calculating the acceleration of the vehicle, and when the acceleration calculated by the acceleration calculating means is a predetermined value or more, the acceleration is calculated. Second displacement control operation means for continuously operating the displacement control compressor at a capacity control rate corresponding to, and the acceleration calculated by the acceleration calculation means is smaller than the predetermined value, and the target blowout temperature is When the capacity control rate of the corresponding capacity-controlled compressor is smaller than the predetermined value, the capacity-controlled compressor is intermittently operated by the intermittent operation control means. With this configuration, when the acceleration of the vehicle is equal to or higher than the predetermined value, the capacity control compressor is operated continuously by controlling the capacity at a capacity control rate corresponding to the acceleration. It becomes possible to limit the power.
Further, when the acceleration of the vehicle is equal to or higher than a predetermined value, the capacity control compressor is continuously operated.
It becomes possible to prevent deterioration in acceleration due to FF.

According to a third aspect of the present invention, there is provided a vehicle air conditioning control method for controlling a blowout temperature of air to a target blowout temperature by changing a capacity control rate of a capacity control compressor in a refrigeration cycle. When the capacity control rate of the corresponding capacity control compressor is smaller than a predetermined value, the capacity control rate is fixed to the predetermined value to intermittently operate the capacity control compressor, and the capacity control corresponding to the target outlet temperature is performed. When the capacity control rate of the compressor is equal to or higher than the predetermined value, the capacity control is performed at a capacity control rate corresponding to the target outlet temperature to continuously operate the capacity control compressor. With this configuration, when the capacity control rate of the capacity control compressor corresponding to the target outlet temperature is smaller than the predetermined value, the capacity control rate is fixed to the predetermined value and the capacity control compressor is operated intermittently. It is possible to obtain the required cooling capacity while reducing the power consumption of the capacity control compressor.

According to a fourth aspect of the present invention, in the third aspect of the invention, the predetermined value of the capacity control rate is a capacity control rate when the system performance coefficient of the refrigeration cycle is near the maximum. Is characterized by. With this configuration, it is possible to increase the cooling efficiency when the capacity control compressor is operating intermittently.

According to a fifth aspect of the present invention, in the third or fourth aspect of the invention, when the acceleration of the vehicle is equal to or greater than a predetermined value, the capacity is controlled at a capacity control rate corresponding to the acceleration to perform the capacity control. When the control compressor is continuously operated, the acceleration of the vehicle is smaller than the predetermined value, and the capacity control rate of the capacity control compressor corresponding to the target outlet temperature is smaller than the predetermined value, the capacity control rate is It is characterized in that the capacity control compressor is intermittently operated with a fixed value. With this configuration, when the acceleration of the vehicle is equal to or higher than the predetermined value, the capacity control compressor is operated continuously by controlling the capacity at a capacity control rate corresponding to the acceleration. It becomes possible to limit the power. Further, when the acceleration of the vehicle is equal to or higher than the predetermined value, the displacement control compressor is continuously operated, so that it is possible to prevent deterioration of acceleration due to ON-OFF of the displacement control compressor.

According to a sixth aspect of the invention, in the fifth aspect of the invention, the value of the capacity control rate corresponding to the acceleration decreases as the acceleration increases. With this configuration, it is possible to reduce the power consumption of the displacement control compressor as the acceleration increases.

According to a seventh aspect of the invention, in the sixth aspect of the invention, the maximum value of the capacity control rate corresponding to the acceleration is the capacity control rate when the system coefficient of performance of the refrigeration cycle is near the maximum. Is characterized in that. With this configuration, it is possible to minimize the decrease in cooling efficiency during acceleration operation.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a vehicle air conditioner and a vehicle air conditioning control method according to the present invention will be described below with reference to the drawings of FIGS. 1 to 9.

[First Embodiment] First, a first embodiment of a vehicle air conditioner and a vehicle air conditioning control method according to the present invention will be described with reference to the drawings of FIGS. 1 to 5.
FIG. 1 is a schematic configuration diagram of a vehicle air conditioner. This vehicle air conditioner includes a refrigeration cycle including a capacity-controlled compressor 1, a condenser 2, an expansion valve 3, and an evaporator 4.
The capacity control compressor 1 is connected to a drive unit (for example, engine output) (not shown) via the electromagnetic clutch 5 by turning the connection ON-O.
FF control is possible.

The air sucked from the outside air intake port 6 of the vehicle C is blown to the evaporator 4 by the blower 7, cooled by the evaporator 4, and then blown into the vehicle interior 9 from the air outlets 8a and 8b. Further, the vehicle C has an outside temperature sensor 10 for detecting the outside temperature and an insolation sensor 1 for detecting the intensity of insolation.
1. A room temperature sensor 12 for detecting the temperature inside the vehicle and a room temperature setting device (temperature setting device) 13 for setting the temperature inside the vehicle are installed. The detection values of these sensors 10, 11, 12 and the setting value of the room temperature setting device 13 are It is input to the controller 20. The controller 20 controls the capacity control ratio (capacity control ratio) of the capacity control compressor 1 and the capacity control compression by the electromagnetic clutch 5 based on the detection values of the sensors 10, 11 and 12 and the setting value of the room temperature setting device 13. The ON-OFF control of the machine 1 is executed.

Next, with reference to FIGS. 4 and 5, a method of controlling the vehicle air conditioner according to the first embodiment will be described. As described above, the system coefficient of performance (system COP) of the refrigeration cycle in the vehicle air conditioner including the capacity-controlled compressor 1 changes depending on the capacity ratio of the capacity-controlled compressor 1 (see FIG. 5). In detail, the system CO
P increases with a decrease in the capacity ratio (or cooling capacity), reaches a maximum value when the capacity ratio is around 50%, and then decreases with a decrease in the capacity ratio.

Therefore, the capacity control rate (hereinafter, referred to as the maximum COP capacity control rate) θmax when the system COP becomes almost the maximum value is obtained in advance as a threshold value, and the required capacity control corresponding to the required outlet temperature (target outlet temperature) of air conditioning is obtained. By changing the control method of the capacity control compressor 1 depending on whether or not the rate θ is equal to or greater than the maximum COP capacity control rate θmax, both improvement of cooling efficiency and power saving are achieved.

That is, when the required capacity ratio θ of the capacity control compressor 1 according to the required outlet temperature is equal to or higher than the maximum COP capacity control ratio θmax (for example, A in FIG. 4).
Point, cooling load A), the capacity control compressor 1 is continuously operated in the same manner as in the conventional case, and capacity control is performed at the required capacity control rate θ to obtain the required cooling capacity.

On the other hand, when the required capacity control rate θ of the capacity-controlled compressor 1 according to the required outlet temperature is smaller than the maximum COP capacity control rate θmax (for example, point B in FIG. 4, cooling load B), the capacity control rate is maximized. The required cooling capacity is obtained by fixing the COP capacity ratio θmax and performing the intermittent operation control (ON-OFF control) of the capacity control compressor 1. That is, the required capacity ratio θ of the capacity-controlled compressor 1 according to the required outlet temperature is the threshold value θ.
When it is equal to or less than max, efficient cooling is performed by operating the capacity control compressor 1 at the capacity control rate θmax at which the system COP is almost maximum. In that case, the capacity control compressor 1 is continuously operated at the capacity control rate θmax. Since this will result in overcooling, the capacity-controlled compressor 1 is turned on and off so that the required cooling capacity is achieved. As a result, power saving of the vehicle air conditioner can be achieved.

In the examples shown in FIGS. 4 and 5, the maximum COP capacity ratio is about 50%, but this value is determined by the entire vehicle air conditioning system and is always about 5.
Although not always 0%, it is generally about 40 to 60%.

FIG. 2 shows a control block diagram of the vehicle air conditioner according to the first embodiment. The schematic control procedure will be described with reference to this block diagram. When the output signals of the outside temperature sensor 10, the solar radiation sensor 11, the room temperature sensor 12, and the room temperature setting device 13 are input to the controller 20, the outlet temperature calculation is performed based on these signals. The means 21 calculates the required blowout temperature Tms, and the capacity control rate calculation means 22 calculates the required capacity control rate θ corresponding to the required blowout temperature Tms. Then, the determining means 23 determines whether or not the required capacity control rate θ corresponding to the required outlet temperature Tms is smaller than the maximum COP capacity control rate θmax, and when it is smaller than the maximum COP capacity control rate θmax, the intermittent operation control means 25 determines. The capacity control rate is fixed to the maximum COP capacity control rate θmax, the electromagnetic clutch 5 is turned on / off, and the capacity control compressor 1 is intermittently operated. On the other hand, when the required capacity control rate θ corresponding to the required outlet temperature Tms is greater than or equal to the maximum COP capacity control rate θmax, the capacity control rate control means (capacity control operation means) 24 becomes the required capacity control rate θ corresponding to the required outlet temperature Tms. Thus, the capacity control compressor 1 is controlled to continuously operate the capacity control compressor 1.

Next, the vehicle air conditioning control method according to the first embodiment will be described more specifically with reference to the flowchart of FIG. First, in step ST1, the controller 20 sets the set value of the room temperature setter 13 and the detected values of the outside temperature sensor 10, the solar radiation sensor 11, and the room temperature sensor 12 respectively.
To enter. Next, in step ST2, the set value of the room temperature setting device 13, the external temperature sensor 10, and the solar radiation sensor 1 are set.
1. Based on the respective detected values of the room temperature sensor 12, the required outlet temperature Tms for air conditioning is calculated. In FIG. 3, “air conditioning” is displayed as “air conditioning”. Next, in step ST3, the required capacity ratio θ of the displacement control compressor 1 is calculated from a map or a calculation formula (not shown) based on the required outlet temperature Tms.

Next, the process proceeds to step ST4 and step S
It is determined whether or not the required capacity control rate θ obtained at T3 is greater than or equal to the maximum COP capacity control rate θmax. When the determination result in step ST4 is “YES” (θ ≧ θmax), the process proceeds to step ST5, in which the capacity is controlled by the required capacity ratio θ calculated in step ST3 to continuously operate the capacity control compressor 1. The blowout temperature of the air blown out from the blowout ports 8a and 8b is controlled to be the required blowout temperature Tms obtained in step ST2.

On the other hand, if the determination result in step ST4 is "NO" (θ <θmax), step ST
Go to 6 and change the capacity ratio θ to the maximum COP capacity ratio θ.
In addition to performing the capacity control operation of the capacity control compressor 1 as max, the ON / OFF control operation of the capacity control compressor 1 is performed by performing the ON-OFF control of the electromagnetic clutch 5, and the air blown out from the air outlets 8a and 8b. The blowout temperature is controlled to be the required blowout temperature Tms obtained in step ST2. Then, step ST5 or step ST6
After performing the processing of (1), the process returns to step ST1 again.

[Second Embodiment] Next, a second embodiment of a vehicle air conditioner and a vehicle air conditioning control method according to the present invention will be described with reference to the drawings of FIGS. 6 to 9. FIG. 6 is a schematic configuration diagram of a vehicle air conditioner according to the second embodiment. In the second embodiment, the detected value of the engine speed sensor 14 of the vehicle C is the controller 20.
It is designed to be input to. This is a structural difference from the first embodiment, and since the other structures are the same as those of the first embodiment, the same mode parts are designated by the same reference numerals and the description thereof will be omitted. .

Then, in the second embodiment, the acceleration α of the vehicle C is calculated based on the detected value of the engine speed sensor 14.
When the acceleration α is lower than a predetermined threshold value αs, the displacement control compressor 1 is operated by the same control method as in the first embodiment described above, and when the acceleration α is equal to or higher than the threshold value αs, The capacity is controlled at the required capacity ratio θ according to α, and the capacity control compressor 1 is continuously operated.

FIG. 7 shows a control block diagram of the vehicle air conditioner according to the second embodiment. The schematic control procedure will be described with reference to this block diagram. When an output signal of the engine speed sensor 14 is input to the controller 20, the acceleration calculating means 26 calculates the acceleration α of the vehicle C based on the output signal and makes a determination. The means 27 determines whether or not the acceleration α is smaller than the threshold value αs, and when it is equal to or larger than the threshold value αs, the second capacity control rate calculation means 28 calculates the required capacity control rate θ corresponding to the acceleration α, and the required capacity control The second capacity control rate control means (second capacity control operation means) 29 controls the capacity ratio so that the rate becomes θ, and the capacity control compressor 1 is continuously operated.

When the acceleration α is smaller than the threshold value αs, the same as in the case of the first embodiment, the output signals of the outside temperature sensor 10, the solar radiation sensor 11, the room temperature sensor 12, and the room temperature setter 13 are changed. When it is input to the controller 20, the blow-out temperature calculation means 21 determines the required blow-out temperature T based on these.
Then, the capacity control rate calculation means 22 calculates the required capacity control rate θ corresponding to the required outlet temperature Tms.

Then, the determining means 23 determines that the required outlet temperature T
It is determined whether or not the required capacity control rate θ corresponding to ms is smaller than the maximum COP capacity control rate θmax, and the maximum COP
When it is smaller than the capacity control rate θmax, the intermittent operation control means 25 sets the capacity control rate to the maximum COP capacity control rate θ.
It is fixed to max, the electromagnetic clutch 5 is on / off controlled, and the capacity control compressor 1 is intermittently operated. On the other hand, the required capacity ratio θ corresponding to the required outlet temperature Tms is the maximum COP.
When the capacity control rate θmax or more, the capacity control rate control means 24 controls the capacity control rate so that the required capacity control rate θ corresponds to the required outlet temperature Tms, and the capacity control compressor 1 is continuously operated.

Next, the vehicle air conditioning control method according to the second embodiment will be described more specifically with reference to the flow chart of FIG. First, in step ST11, the set value of the room temperature setting device 13, the outside temperature sensor 10, the solar radiation sensor 11, the room temperature sensor 12, and the engine speed sensor 14 are set.
Each detected value of is input to the controller 20. Next, in step ST12, the acceleration α of the vehicle C is calculated based on the temporal change in the detected value detected by the engine speed sensor 14. Next, it progresses to step ST13 and step S
It is determined whether the acceleration α obtained in T12 is smaller than the threshold value αs.

The determination result in step ST13 is "Y
If “ES” (α <αs), the process proceeds to step ST14, the set value of the room temperature setter 13 and the outside temperature sensor 1
Based on the detection values of 0, the solar radiation sensor 11, the room temperature sensor 12, and the engine rotation speed sensor 14, the required outlet temperature Tms of the air conditioning is calculated. In FIG. 8, “air conditioning” is displayed as “air conditioning”. Then, go to step ST15,
Based on the required blow-out temperature Tms obtained in step ST14, the required capacity ratio θ of the capacity control compressor 1 is calculated from a map or a calculation formula (not shown).

Next, the process proceeds to step ST16, and it is determined whether or not the required capacity ratio .theta. Step ST1
If the determination result in 6 is “YES” (θ ≧ θmax), the process proceeds to step ST17 and step ST15.
By continuously controlling the capacity-controlled compressor 1 by controlling the capacity at the required capacity ratio θ obtained in step S1, the outlet temperature of the air blown out from the outlets 8a and 8b becomes the required outlet temperature Tms obtained in step ST14. To control.

On the other hand, if the result of determination in step ST16 is "NO" (θ <θmax), step S
Proceeding to T18, while the capacity control rate θ is set to the maximum COP capacity control rate θmax, the capacity control operation of the capacity control compressor 1 is performed, and the capacity control compressor 1 is controlled to turn on and off by controlling the electromagnetic clutch 5 to be turned on and off. Then, the blowout temperature of the air blown out from the blowout ports 8a and 8b is controlled to be the required blowout temperature Tms obtained in step ST14.

If the determination result in step ST13 is "NO" (α ≧ αs), step ST1
9, the necessary capacity control rate θ corresponding to the acceleration α is calculated with reference to, for example, the α / θ map. FIG. 9 shows α / for calculating the required capacity ratio θ according to the acceleration α.
6 is an example of a θ map, in which the required capacity ratio θ when the acceleration α is the threshold value αs is set to the maximum COP capacity ratio θ.
It is set so that the required capacity ratio θ becomes smaller as the acceleration α becomes larger than the threshold value αs.

Next, in step ST20, the capacity control compressor 1 is continuously operated by controlling the capacity at the required capacity ratio θ obtained in step ST19. And step ST
After executing the process of 17 or step ST18 or step ST20, the process returns to step ST11 again.

According to the vehicle air conditioning control method of the second embodiment, the acceleration α of the vehicle C is smaller than the threshold value αs, and the required capacity control rate θ of the capacity control compressor 1 according to the required outlet temperature θ. Is smaller than the maximum COP capacity ratio θmax (for example, point B in FIG. 4, cooling load B), the capacity control ratio is set to the maximum COP capacity ratio θm.
Fix with ax and intermittently control the capacity control compressor 1 (ON
Since the necessary cooling capacity is obtained by performing (-OFF control), power saving of the vehicle air conditioner can be achieved as in the case of the first embodiment described above. When the threshold value αs is set to an extremely small value, when the acceleration α of the vehicle C is smaller than the threshold value αs,
This is when the vehicle C is operating at a substantially constant speed.

In addition, in the second embodiment, in addition to this, the following operation and effect can be obtained. When the vehicle C is operating at an acceleration greater than the threshold value αs, the required capacity control rate θ is set to be equal to or less than the maximum COP capacity control rate θmax, and the required capacity control rate θ is controlled to decrease as the acceleration increases. The larger the power consumption, the more the power consumption of the displacement control compressor 1 can be reduced, and as a result, the acceleration performance of the vehicle C can be improved.

When the vehicle C is operating at an acceleration greater than the threshold value .alpha.s, the electromagnetic clutch 5 does not perform the ON-OFF control of the capacity control compressor 1 and the electromagnetic clutch 5 is held in the ON state. , The electromagnetic clutch 5 is switched from OFF to ON during the acceleration operation of the vehicle C to prevent the deterioration of the acceleration performance due to the activation of the capacity control compressor 1, and as a result, the drivability resulting from the activation of the capacity control compressor 1 is eliminated. Can be prevented from worsening.

[0037]

As described above, according to the first aspect of the present invention, it is possible to obtain the required cooling capacity while reducing the power consumption of the capacity control compressor. The excellent effect of being able to save the power consumption of is achieved. According to the invention described in claim 2, it is possible to limit the power consumption of the displacement control compressor during the acceleration operation, so that an excellent effect that the acceleration performance of the vehicle is improved is exhibited. Further, when the acceleration of the vehicle is equal to or higher than a predetermined value, the capacity control compressor is continuously operated, so that it is possible to prevent deterioration of acceleration performance due to ON-OFF of the capacity control compressor, so that the drivability of the vehicle is improved. The excellent effect of improving is also exhibited.

According to the third aspect of the present invention, it is possible to obtain the required cooling capacity while reducing the power consumption of the capacity control compressor, so that it is possible to save the power of the vehicle air conditioner. It has an excellent effect. Claim 4
According to the invention described in (1), it is possible to increase the cooling efficiency during intermittent operation of the capacity control compressor,
There is an effect that the power saving of the vehicle air conditioner can be further enhanced.

According to the fifth aspect of the present invention, it is possible to limit the power consumption of the displacement control compressor during acceleration operation, so that the excellent effect of improving the acceleration performance of the vehicle is achieved. . When the vehicle acceleration is equal to or higher than a predetermined value, the capacity control compressor is continuously operated,
Since it becomes possible to prevent deterioration of acceleration performance due to ON-OFF of the capacity control compressor, an excellent effect of improving drivability of the vehicle is also obtained.

According to the sixth aspect of the invention, the power consumption of the displacement control compressor can be reduced as the acceleration increases, so that the acceleration performance of the vehicle can be further improved. According to the invention described in claim 7, it is possible to minimize the decrease in the cooling efficiency during the acceleration operation, so that it is possible to improve the drivability while preventing the decrease in the environment inside the vehicle. Is played.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a vehicle air conditioner according to a first embodiment of the present invention.

FIG. 2 is a control block diagram of the vehicle air conditioner according to the first embodiment.

FIG. 3 is a flowchart of vehicle air conditioning control in the first embodiment.

FIG. 4 is a diagram showing a relationship between a capacity control rate and a system COP of the capacity control compressor used in the first embodiment.

FIG. 5 is a diagram showing a relationship between a capacity control rate of a general capacity control compressor and a system COP.

FIG. 6 is a configuration diagram of a vehicle air conditioner according to a second embodiment of the present invention.

FIG. 7 is a control block diagram of a vehicle air conditioner in the second embodiment.

FIG. 8 is a flowchart of vehicle air conditioning control in the second embodiment.

FIG. 9 α / θ used in the second embodiment
It is a map.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Capacity control compressor 10 Outside temperature sensor 11 Solar radiation sensor 12 Room temperature sensor 13 Room temperature setting device (temperature setting device) 21 Outlet temperature calculation means 22 Capacity control rate calculation means 24 Capacity control rate control means (Capacity control operation means) 25 Intermittent operation Control means 26 Acceleration calculation means 29 Second capacity control rate control means (second capacity control driving means) C Vehicle

Claims (7)

[Claims] 1. A vehicle air conditioner for controlling a blowout temperature of air to a target blowout temperature by changing a capacity control rate of a capacity control compressor in a refrigeration cycle, including a room temperature sensor, an outside temperature sensor, a solar radiation sensor, and a temperature setter. And a capacity control rate calculating means for calculating a capacity control rate of the capacity control compressor corresponding to the target outlet temperature based on a calculation result of the outlet temperature calculating means. An intermittent operation control means for fixing the capacity control rate to the predetermined value and intermittently operating the capacity control compressor when the capacity control rate calculated by the capacity control rate calculation means is smaller than a predetermined value; When the capacity control rate calculated by the capacity control rate calculating means is equal to or greater than a predetermined value, the capacity control is performed at the capacity control rate corresponding to the target blowout temperature to connect the capacity control compressor. Air conditioning system is characterized in that and a capacity control operation means for operating. 2. An acceleration calculating means for calculating an acceleration of a vehicle, and when the acceleration calculated by the acceleration calculating means is a predetermined value or more, the capacity control compressor is continuously operated at a capacity control rate corresponding to the acceleration. A second capacity control operation means, wherein the acceleration calculated by the acceleration calculation means is smaller than the predetermined value, and the capacity control rate of the capacity control compressor corresponding to the target outlet temperature is lower than the predetermined value. The air conditioner for a vehicle according to claim 1, wherein the capacity control compressor is intermittently operated by the intermittent operation control means when the value is also small. 3. A vehicle air conditioning control method for controlling a blowout temperature of air to a target blowout temperature by changing a capacity control rate of a capacity control compressor in a refrigeration cycle, wherein the volume control compressor corresponding to the target blowout temperature. When the capacity control rate of is smaller than a predetermined value, the capacity control rate is fixed to the predetermined value to intermittently operate the capacity control compressor, and the capacity control rate of the capacity control compressor corresponding to the target outlet temperature is When the value is equal to or more than the predetermined value, the vehicle air conditioning control method is characterized in that the capacity is controlled at a capacity control rate corresponding to the target outlet temperature to continuously operate the capacity control compressor. 4. The air conditioning control method for a vehicle according to claim 3, wherein the predetermined value of the capacity control rate is a capacity control rate when the system performance coefficient of the refrigeration cycle is near the maximum. 5. When the acceleration of the vehicle exceeds a predetermined value,
The capacity control of the capacity control compressor is carried out continuously by controlling the capacity at a capacity control rate corresponding to the acceleration, and the acceleration of the vehicle is smaller than the predetermined value and corresponding to the target outlet temperature of the capacity control compressor. The air conditioning control of the vehicle according to claim 3 or 4, wherein when the rate is smaller than a predetermined value, the capacity control rate is fixed to the predetermined value and the capacity control compressor is intermittently operated. Method. 6. The air conditioning control method for a vehicle according to claim 5, wherein the value of the capacity control rate corresponding to the acceleration decreases as the acceleration increases. 7. The maximum value of the capacity control rate corresponding to the acceleration is the capacity control rate when the system coefficient of performance of the refrigeration cycle is near the maximum.
5. The vehicle air conditioning control method according to.