JP2002283829A - Air conditioner for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner for an automobile which can efficiently execute the air conditioning of the interior of an automobile cabin by the control of the rotation number of a compressor. SOLUTION: A refrigerating cycle is constituted of the compressor 10, an outside heat exchanger (a condenser) 13 and an inside heat exchanger (an evaporator) 19 or the like. An electric motor 11 to drive the compressor 10 is provided. The control device 28 executes a control mode of temperature priority for controlling the rotation number of the electric motor 11 so as to make the temperature of the interior of the automobile cabin as a setting temperature when the humidity of the interior of the automobile cabin is lower than the prescribed discomfort humidity decided by the temperature of the interior of the automobile cabin, and at the same time, executes the control mode of humidity priority for controlling the rotation number of the electric motor 11 so as to lower the humidity of the interior of the automobile cabin when the humidity of the interior of the automobile cabin is more than the discomfort humidity.

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 an automobile, which suitably air-conditions a passenger compartment.

[0002]

2. Description of the Related Art A conventional air conditioner (car air conditioner) used for a fuel engine vehicle, for example, performs air conditioning of a vehicle interior of a vehicle when an air conditioning switch provided on an operation panel is turned on. Is driven to rotate. 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 that is driven by an electric motor and rotates, and radiates heat to condense and liquefy. Through the heat exchanger provided in the vehicle interior. The liquid refrigerant flowing into the heat exchanger evaporates there, absorbs heat from the surroundings at that time, exhibits a cooling effect, and exchanges heat with the air in the passenger compartment by an indoor blower to cool the passenger compartment and perform air conditioning. Thereafter, a refrigerant circuit that repeats a refrigeration cycle in which the refrigerant returns to the compressor again is configured.

[0003] The vehicle is provided with a control device for controlling the air conditioner, and when the interior of the vehicle is cooled to a predetermined temperature set by a temperature setting volume, the control device controls the temperature installed in the vehicle interior. The rotation of the compressor is turned off based on the temperature detected by the sensor. When the compressor is turned off, the interior of the vehicle is no longer cooled, so that the temperature in the vehicle gradually increases. When the temperature in the cabin rises and rises to a predetermined temperature set by the temperature setting volume, a temperature sensor attached to the cabin detects the increased temperature, and the control device turns on the compressor to turn on the compressor. To cool. The control device repeats this to control the interior of the vehicle for comfortable air conditioning.

An air conditioner for air-conditioning the interior of a vehicle in an electric vehicle using an electric motor as a power source for traveling is similar to an air conditioner used for a fuel engine vehicle except that a compressor is driven by the electric motor. A refrigerant circuit that repeats a refrigeration cycle is configured. This electric vehicle is also provided with a control device for controlling the air conditioner, and when the cabin is cooled to a predetermined temperature set by a temperature setting volume, the control device is a temperature sensor mounted in the cabin. Based on the detected temperature, the number of revolutions of the compressor is controlled to perform comfortable air conditioning in the vehicle interior.

[0005]

However, current air conditioners are configured so that the interior of the vehicle can be cooled to a predetermined temperature even when the compressor is rotating at a low speed such as when the vehicle is running at a low speed or stopped. ing. The air blown into the cabin is once cooled to about 0 ° C. by a heat exchanger provided in the cabin, and then heated by reheating by a part of the cooling water or a condenser, so that the cabin is cooled to a predetermined temperature. Was controlled to the set temperature. When the temperature in the cabin is lower than the set temperature, the reheat amount is increased, and when the temperature is lower than the set temperature but close to the set temperature, the reheat amount is reduced to control the cabin to a predetermined set temperature. . For this reason, it was difficult to control the interior of the vehicle to a comfortable temperature and humidity.

[0006] The air conditioning in the passenger compartment is once performed at 0 ° C using a heat exchanger.
After cooling to the vicinity, since it was heated by reheating,
There was a problem with extremely poor energy efficiency.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art, and provides an air conditioner for a vehicle capable of efficiently performing air conditioning in a passenger compartment by controlling the number of revolutions of a compressor. The purpose is to:

[0008]

That is, an air conditioner for a vehicle according to the first aspect of the present invention, which air-conditions a vehicle interior of a vehicle, comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger, and the like. A refrigeration cycle, an electric motor for driving a compressor, a blower for supplying air cooled by the indoor heat exchanger into the vehicle interior, and a temperature sensor for substantially detecting the temperature in the vehicle interior, A humidity sensor for substantially detecting the humidity in the vehicle interior; and a control device for controlling the operation of the electric motor based on the output of each of the sensors. When the temperature is lower than the predetermined unpleasant humidity, the temperature-priority control mode for controlling the rotation speed of the electric motor to keep the temperature in the vehicle interior at the set temperature is executed, and the humidity in the vehicle interior becomes unpleasant humidity. If there above, and executes the control mode of the humidity priority for controlling the rotational speed of the electric motor so as to reduce the humidity of the vehicle interior.

Further, the vehicle air conditioner according to the second aspect of the present invention includes the heating means for heating the vehicle interior in the above, and the control device performs the control mode in the vehicle interior when executing the humidity priority control mode. The heating capacity of the heating means is controlled so that the temperature is set to the set temperature.

According to a third aspect of the present invention, there is provided the air conditioner for a vehicle according to the second aspect, wherein the control device executes the temperature priority control mode when the electric motor is operated. When the heating by the heating means is stopped and the electric motor is stopped, the heating capacity of the heating means is controlled so that the temperature in the vehicle compartment is set to the set temperature.

According to a fourth aspect of the present invention, there is provided an air conditioner for an automobile for air-conditioning the interior of an automobile, comprising a refrigeration cycle including a compressor, an outdoor heat exchanger, an indoor heat exchanger, and the like. An electric motor for driving the compressor, a blower for supplying air cooled by the indoor heat exchanger into the vehicle interior, a temperature sensor for detecting a temperature of the interior of the vehicle substantially, A humidity sensor for detecting humidity, and a control device for controlling the operation of the electric motor based on the output of each of these sensors, the control device is determined by the temperature and humidity in the vehicle interior, the predetermined In addition to having data on the minimum number of rotations of the electric compressor capable of maintaining comfortable humidity, the number of rotations of the electric compressor for setting the temperature in the vehicle interior to the set temperature is calculated, and the calculation is performed. If the calculated rotation speed is equal to or higher than the minimum rotation speed, a temperature-priority control mode for controlling the operation of the electric compressor is executed at the calculated rotation speed, and if the calculated rotation speed is lower than the minimum rotation speed, In addition, a humidity priority control mode for controlling the operation of the electric compressor at the minimum rotation speed is executed.

The vehicle air conditioner according to a fifth aspect of the present invention, in addition to the fourth aspect, further comprises a heating unit for heating the vehicle interior, and the control device executes a humidity-priority control mode. The heating capacity of the heating means is controlled so that the temperature in the passenger compartment is set to the set temperature.

According to the present invention, a refrigeration cycle including a compressor, an outdoor heat exchanger, an indoor heat exchanger, etc., an electric motor for driving the compressor, and air cooled by the indoor heat exchanger are supplied to the vehicle. A blower for supplying indoors, a temperature sensor for substantially detecting the temperature in the vehicle interior, and a humidity sensor for substantially detecting the humidity in the vehicle interior,
A control device for controlling the operation of the electric motor based on the output of each of the sensors, wherein the control device controls the operation of the electric motor when the humidity in the vehicle interior is lower than a predetermined unpleasant humidity determined by the temperature in the vehicle interior. A temperature-priority control mode that controls the rotation speed of the electric motor so that the temperature of the electric motor is set to the set temperature, and when the humidity in the cabin is higher than the unpleasant humidity, the electric motor is controlled to reduce the humidity in the cabin. Since the control mode of the humidity priority which controls the number of rotations is executed, regardless of whether the humidity in the cabin is lower than the unpleasant humidity or the humidity in the cabin is higher than the unpleasant humidity, the temperature in the cabin is always a comfortable temperature. And humidity can be controlled.
As a result, the vehicle air conditioner can perform efficient air conditioning by controlling the number of revolutions of the compressor, and can use energy efficiently and increase the energy saving effect. Therefore, the convenience of the vehicle air conditioner can be greatly improved by maintaining the interior of the vehicle at a comfortable temperature and humidity.

According to the invention of claim 2, in addition to the above,
A heating device for heating the vehicle interior is provided, and the control device includes:
When executing the humidity-priority control mode, the heating capacity of the heating means is controlled so that the temperature in the cabin is set to the set temperature. And can be kept in humidity. As a result, it is possible to perform air conditioning in the vehicle cabin without impairing comfort even in terms of temperature. Therefore, the interior of the vehicle can be maintained at a comfortable temperature, and the convenience of the automotive air conditioner can be greatly improved.

According to the third aspect of the present invention, in addition to the second aspect, the control device, when executing the temperature-priority control mode,
When the electric motor is operating, the heating by the heating means is stopped, and when the electric motor is stopped, the heating capacity of the heating means is controlled so that the temperature in the passenger compartment is set to the set temperature. Therefore, when executing the temperature-priority control mode, it is possible to perform efficient air conditioning while minimizing the heating of the vehicle interior. Therefore, it is possible to greatly save energy.

According to the invention of claim 4, the compressor,
A refrigeration cycle including an outdoor heat exchanger and an indoor heat exchanger, an electric motor for driving a compressor, a blower for supplying air cooled by the indoor heat exchanger to the vehicle interior, A temperature sensor for detecting the temperature in the vehicle compartment, a humidity sensor for substantially detecting the humidity in the vehicle compartment, and a control device for controlling the operation of the electric motor based on the output of each of the sensors. Is determined by the temperature and humidity in the vehicle interior, holds data on the minimum number of rotations of the electric compressor capable of maintaining a predetermined comfortable humidity in the vehicle interior, and an electric compressor for setting the temperature in the vehicle interior to a set temperature. Calculate the rotation speed of
If the calculated rotation speed is equal to or higher than the minimum rotation speed, a temperature priority control mode for controlling the operation of the electric compressor is executed at the calculated rotation speed, and the calculated rotation speed is lower than the minimum rotation speed. Is executed in a humidity-priority control mode for controlling the operation of the electric compressor at the minimum rotation speed. Therefore, when the humidity in the vehicle interior is lower than the unpleasant humidity or when the humidity in the vehicle interior is higher than the unpleasant humidity Regardless of the case, it is possible to always control the temperature and humidity in the vehicle compartment comfortably and efficiently. As a result, the air conditioner for a vehicle can efficiently air-condition the vehicle interior by controlling the rotation speed of the compressor, and can simplify the control. Therefore, the convenience of the air conditioner for a vehicle can be greatly improved.

According to a fifth aspect of the present invention, in addition to the fourth aspect, a heating means for heating the vehicle interior is provided, and the control device reduces the temperature of the vehicle interior when executing the humidity priority control mode. Since the heating capacity of the heating means is controlled to the set temperature, the interior of the vehicle can be maintained at a comfortable temperature and humidity while preventing the interior of the vehicle from being too cold. As a result, it is possible to perform air conditioning in the vehicle cabin without impairing comfort even in terms of temperature. Therefore, the interior of the vehicle can be maintained at a comfortable temperature, and the convenience of the automotive air conditioner can be greatly improved.

[0018]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory view of an automotive air conditioner 9 for explaining the present invention, and FIG. 2 is a control device 2 when the automotive air conditioner 9 is controlled by one controller.
8 are respectively shown. In FIG. 1, 9 is
This is an air conditioner for a vehicle equipped with a control device 28 and mounted on a vehicle (in the embodiment, a hybrid car (HEV)). The air conditioner 9 performs air conditioning such as cooling, heating, and dehumidification in a vehicle cabin. A discharge-side pipe 10A of an electric compressor 10 (hereinafter, referred to as an electric compressor) including a rotary compressor or the like is provided outside. The condenser 13 is connected to a condenser 13 as a heat exchanger, and the outlet side of the condenser 13 is connected to a liquid receiver 17.

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 (cooler) 19 as an indoor heat exchanger. The outlet side of the evaporator 19 is connected to a pipe 10B on the suction side of the electric compressor 10 to form an annular refrigeration cycle (refrigerant circuit). The electric compressor 10 and the condenser 13 are installed outside the passenger compartment where no one gets on the vehicle, and the evaporator 19 is installed inside the vehicle passenger compartment where one gets on. The condenser 1
3 is provided with an outdoor blower 14 for dissipating heat of the condenser 13 to the outside of the vehicle, and an evaporator 19 is provided with an indoor blower 20. The air cooled by the evaporator 19 is supplied to the vehicle by the indoor blower 20. The air is blown into the cabin and the cabin is cooled. The electric compressor 10 is provided with an electric motor 11 that is supplied with power and is driven from a vehicle-mounted battery.
The electric compressor 10 is driven by the electric motor 11.

An air passage 22 is provided on the indoor side of the evaporator 19, and a heater core (heating means) 23 used for warming the vehicle interior is provided in the air passage 22. The heater core 23 is formed in a mesh shape, a lattice shape, or a grid shape, and the air that has passed through the evaporator 19 is heated in the process of passing through the heater core 23 to heat the vehicle interior. The heater core 23 is provided so as to close the air ventilation passage 22 by about half. On the evaporator 19 side of the heater core 23, an air mix door 21 that can open and close is provided while closing the entire surface of the heater core 23.

The air mix door 21 is rotatably supported at the center of the air passage 22 so that the air mix door 21 has a larger opening degree, the air passing through the heater core 23 increases, and the air mix door 21 has a smaller opening degree. Air passing through the heater core 23 is reduced. When the air mix door 21 is closed to close the heater core 23, the air passing through the air passage 22 is not heated, and when the air mix door 21 is opened and separated from the heater core 23, the air passing through the heater core 23 is heated. Can be That is, the air passing through the air ventilation passage 22 depends on the degree of opening of the air mixing door 21 and the heater core 2
3 and the air that is blown into the vehicle compartment without passing through the heater core 23 without passing through the heater core 23. As a result, the air that is blown into the vehicle compartment from the air passage 22 is heated with the heated air. The air with no air is mixed and air at a predetermined temperature is blown into the vehicle interior.

The control device 28 of the vehicle air conditioner 9
Is the vehicle interior temperature (in this case, the temperature of the air blown into the vehicle interior from the air passage 22 is converted into the vehicle interior temperature), and the outlet air of the evaporator 19 detected by an evaporator temperature sensor 44 described later. The operation of the electric motor 11 that drives the electric compressor 10 based on the temperature, the amount of insolation detected by the insolation amount detection sensor 34, the vehicle interior humidity detected by the in-vehicle humidity sensor 36, the outside air temperature detected by the outside air temperature detection sensor 35, etc. Speed).

Next, FIG. 2 shows a control device 28 for controlling the air conditioner 9 for a vehicle with one controller. In the control device 28, the air conditioner 9 is turned ON / O.
ACSW (air conditioner switch) 29 for FF
A fan SW (fan switch) 30 and a temperature setting volume 31 (temperature setting in the figure) for setting the temperature in the vehicle compartment are connected. Further, the control device 28 includes an in-vehicle temperature sensor 33 that is provided in the cabin and substantially detects the temperature in the cabin,
The in-vehicle humidity sensor 36, the electric compressor 10, and the like are connected (FIGS. 1 and 2). Note that the outlet temperature sensor 32
Is mounted, for example, in the vicinity of an air intake port of air blown into the vehicle interior from the air ventilation path 22.

Further, the controller 28 has an indoor blower 2 for supplying the air cooled by the evaporator 19 into the vehicle interior.
0, an insolation amount detection sensor 34 for detecting the amount of insolation, an outside air temperature detection sensor 35 for detecting the outside air temperature outside the cabin, an in-vehicle humidity sensor 36 for detecting the humidity in the cabin (the humidity of the air blown out from the air passage 22). (Including a sensor and a sensor for detecting the humidity in the vehicle compartment), an expansion valve 18 and the like. The in-vehicle humidity sensor 36 is mounted, for example, near the in-vehicle temperature sensor 33.

The control device 28 includes an engine speed sensor 37 for detecting the engine speed, a coolant temperature, an engine speed, and a thermostat (radiator valve).
Sensor 38 for detecting information from the vehicle such as ON / OFF of the vehicle, a cooling water temperature sensor 39 for detecting a cooling water temperature of the engine, an input current sensor 40 for detecting an input current, and an electric compressor 10 Refrigerant temperature sensor 41 (SUC in the figure) that detects the refrigerant temperature at the inlet
Temperature), an outlet air temperature sensor 42 (DIS in the figure) for detecting the outlet air temperature of the electric compressor 10, a power element temperature sensor 43 for detecting the power element temperature, and the condenser 1
3 is connected to an evaporator temperature sensor 44 (COND output temperature in the figure) which detects the outlet air temperature.

When the data detected by the above-described sensors is input, the control device 28 controls the rotation speed of the electric compressor 10, the rotation speed of the indoor blower 20 (indoor fan in the figure), and the outdoor blower. 14 (outdoor fan in the figure)
Control of the rotation speed of the expansion valve 18, control of the opening of the outlet, control of the opening of the air mix door 21, control of the rotation speed of the power element cooling water pump and the fan, etc. The room temperature and the like are displayed on the instrument panel of the automobile.

On the other hand, FIG. 3 shows the relationship between the humidity and the temperature at which discomfort is felt. In the figure, the vertical axis represents the humidity, and the lower part of the vertical axis shows the lower humidity, and the higher the upper part, the higher the humidity. The temperature is shown on the horizontal axis, and the temperature is lower on the left side of the horizontal axis and higher on the right side. In this figure, a humidity h (T) curve at which the user feels uncomfortable is drawn with h (T) as the humidity at which the user feels uncomfortable when the humidity is higher than this. In the figure, when the temperature is low (left side in the figure), the user does not feel uncomfortable unless the humidity h (T) is high, and when the temperature is high (right side in the figure), he / she feels uncomfortable even when the humidity is low. I have. The upper side from the humidity h (T) line in FIG. Further, the relationship between the temperature and the humidity at which discomfort is felt is an average value of a plurality of persons.

The control device 28 of the air conditioner 9 for vehicles
Is based on the relationship between the temperature at which discomfort is felt and the humidity h (T), when the humidity in the cabin is lower than a predetermined uncomfortable humidity, the temperature priority for controlling the rotation speed of the electric compressor 10 so that the temperature in the cabin is set to the set temperature. And a humidity-priority control mode for controlling the number of revolutions of the electric compressor 10 so that the humidity in the vehicle compartment is set to the set humidity when the humidity is higher than the unpleasant humidity. That is, when the humidity in the vehicle compartment is lower than the predetermined unpleasant humidity, the control device 28 of the vehicle air conditioner 9 sets the compressor 1 to set the temperature in the vehicle compartment to the set temperature.
The cooling capacity is controlled by controlling the number of rotations of 0 (including heating by reheating in this case), and a control mode in which the temperature in the vehicle compartment is prioritized is executed.

When the control device 28 of the vehicle air conditioner 9 executes the control mode giving priority to temperature, when the electric compressor 10 is operating, the heater core 2
When the heating by the heater core 23 is stopped and the electric compressor 10 is stopped, the heating capacity by the heater core 23 is controlled with the temperature in the vehicle interior as a set temperature.
Further, when the control device 28 of the vehicle air conditioner 9 executes the humidity-priority control mode, the heating capacity of the heater core 23 is controlled using the temperature in the vehicle interior as a set temperature.

In the temperature-priority control mode (when control is not performed with priority given to humidity), the vehicle air conditioner 9 is controlled.
The controller 28 controls the number of rotations of the electric compressor 10 so that the outlet air temperature of the evaporator 19 becomes the set temperature. In this case, the case where the reheat in the heater core 23 is forcibly set to 0, the temperature of the air blown out from the air passage 22 into the vehicle interior (the temperature detected by the blowout temperature sensor 32), or the temperature in the vehicle interior are set. In some cases, reheating (the amount of heat is limited by adjusting the opening of the air mix door 21) is performed to adjust the temperature. In any case, the control device 28 sets the outlet air temperature of the evaporator 19 to a predetermined value. The control of the number of rotations of the electric compressor 10 is performed so that the temperature becomes equal to the temperature.

The temperature in the passenger compartment is set in the temperature priority control mode by controlling the temperature in the passenger compartment by converting the temperature in the passenger compartment from the air temperature at the outlet of the evaporator 19.
The temperature inside the vehicle compartment is calculated by calculating the difference between the outlet air temperature of the evaporator 19 and the set value (by PI control or the like).
The number of revolutions is controlled to control the outlet air temperature of the evaporator 19.
That is, the set value of the outlet air temperature of the evaporator 19 is calculated from the temperature in the passenger compartment, the amount of solar radiation, the outside air temperature, and the set temperature, and then the PI of the electric compressor 10 is calculated from the current deviation of the outlet air temperature of the evaporator 19. Control is performed (FIG. 4). Then, the controller 28 controls the outlet air temperature of the evaporator 19, and this is repeated. The set value of the outlet air temperature of the evaporator 19 is set, for example, by manually operating a setting volume or the like to set the outlet air temperature of the evaporator 19, the temperature in the vehicle compartment, or from the air passage 22 to the vehicle compartment. It may be calculated from the set value of the blowing temperature of the blowing air.

The outlet air temperature of the evaporator 19 may be determined, for example, as shown in FIG. The figure shows a correlation between the temperature in the vehicle interior and the temperature of the outlet air of the evaporator 19. The left column of the figure shows a value obtained by subtracting the set temperature from the temperature in the passenger compartment, and the right column shows the outlet air temperature of the evaporator 19. The value obtained by subtracting the set temperature from the temperature in the vehicle compartment is ≧ 5.
The outlet air temperature of the evaporator 19 at the time of deg is 0 ° C. The value obtained by subtracting the set temperature from the temperature in the vehicle compartment is ≦ −2 deg. Also,
The value obtained by subtracting the set temperature from the temperature in the vehicle compartment 4.5 to -1.
The temperature of the outlet air of the evaporator 19 at the time of 5 is 1 ° C. for 4.5 minus the set temperature from the temperature in the cabin, 2 ° C. for 4 and 4 ° C.
3 at 3 ° C, 3 at 4 ° C, 2.5 at 5 ° C, 2 at 6 ° C, 1.5 at 7 ° C, 1 at 8 ° C, 0.5 at 9 ° C,
0 at 10 ° C, -0.5 at 11 ° C, -1 at 12 ° C,
At −1.5, the temperature is 13 ° C.

The control device 28 controls the number of revolutions of the electric compressor 10 so that the temperature of the air blown from the air passage 22 into the vehicle compartment or the temperature in the vehicle compartment becomes a set value. Have been. In this control, there are a case where the reheat amount from the heater core 23 is forcibly set to 0 and a case where reheat is performed by the heater core 23.
In any case, the control device 28 controls the rotation speed of the electric compressor 10 so that the temperature of the air blown out from the air passage 22 into the vehicle compartment or the temperature in the vehicle compartment becomes a set value.

Next, the temperature of the air blown out from the air passage 22 into the vehicle interior or the temperature of the vehicle interior is set by calculating the difference between the air outlet temperature, the vehicle interior temperature, and the set value (PI control). Etc.) to control the number of revolutions of the electric compressor 10 and to control the temperature in the vehicle compartment by the temperature of the air blown out from the air passage 22 into the vehicle compartment. That is, as shown in FIG. 6, the number of revolutions of the compressor 10 is calculated from the temperature of the air blown into the vehicle interior from the air passage 22 and the difference between the temperature in the vehicle interior and the set temperature, thereby controlling the blowout temperature and the vehicle interior temperature. The set value of the outlet air temperature of the evaporator 19 is set by manual operation as described above, by setting the outlet air temperature of the evaporator 19, or by adjusting the temperature inside the vehicle cabin or the air blown into the vehicle cabin from the air passage 22. It may be calculated from the set value of the blowing temperature.

When the temperature control is performed in the heating operation, the control device 28 determines whether the temperature of the air blown from the air passage 22 into the vehicle compartment or the temperature in the vehicle compartment is lower than the set temperature, and Even if the compressor 10 is stopped, if the temperature is lower than the set temperature, the control for forcibly setting the reheat amount to 0 is canceled, and the heating operation by the reheat is performed. Further, the control device 28 is a temperature-priority control, and the reheat amount is 0.
If this is not the case and a limit is imposed on the reheat amount, the restriction may be removed and the heating operation by reheating may be performed. In this case, the control device 28 controls the heating capacity of the heater core 23 so that the temperature in the passenger compartment is set to the set temperature.

The control device 28 has data relating to the minimum number of revolutions of the electric compressor 10 capable of maintaining a predetermined comfortable humidity in the cabin determined by the temperature and humidity in the cabin. The control device 28 calculates the number of revolutions of the electric compressor 10 for setting the temperature in the passenger compartment to the set temperature, and when the calculated number of revolutions is equal to or higher than the minimum number of revolutions of the electric compressor 10, the electric compressor 1 is calculated at the calculated number of revolutions.
A temperature-priority control mode for controlling the zero operation is executed.
Further, the control device 28 calculates the rotation speed of the electric compressor 10 for setting the temperature in the vehicle compartment to the set temperature, and when the calculated rotation speed is lower than the minimum rotation speed, the control device 28 controls the electric compressor 10 at the minimum rotation speed. The humidity priority control mode for controlling the operation is executed.

In the humidity priority control mode, the controller 28
Is the humidity h (T) that makes you feel uncomfortable when the humidity is higher than this,
The control of the number of rotations of the electric compressor 10 with priority on humidity is performed. The humidity control in this case is determined by the temperature as described in FIG. Then, the humidity in the vehicle compartment or the humidity of the air blown into the vehicle compartment from the air passage 22 is h (T) -Δh.
If it is not 1 (humidity lower by Δh1 than unpleasantness), the humidity h (T) − is adjusted so that the humidity in the vehicle compartment or the humidity of the air blown into the vehicle compartment from the air passage 22 becomes h (T) −Δh1.
Calculate Δh1 (such as PI control) to calculate the electric compressor 10
And the humidity in the vehicle cabin is controlled (FIG. 7). This is repeated, and the humidity in the cabin becomes h (T) -Δh
The frequency of the electric compressor 10 is controlled to be 1. Note that the rotation speed control of the electric compressor 10 in which the humidity is prioritized is such that when the humidity is Δh2 ≧ Δh1, the humidity is h (T) −
Until Δh2 or less, or continue for a fixed time. Further, it may be continued until the reheat amount becomes equal to or less than X (%). In this case, X = the temperature of the evaporator 19 approaches the original target temperature.

The control of the blow-out temperature is performed by the air passage 2
The opening degree of the air mix door 21 is controlled by performing a calculation (such as PI control) based on the difference between the set temperature and the temperature of the air blown into the vehicle compartment from the air outlet 2, thereby controlling the amount of reheating, and Controls the temperature of the air blown into the cabin. That is, the control device 28 as shown in FIG. 8 calculates the difference between the temperature of the air blown from the air passage 22 into the vehicle interior and the set value set by the temperature setting volume 31 (such as PI control) to control the reheat amount. The temperature of the air blown from the air passage 22 into the vehicle compartment is controlled. Note that the control device 28 controls the temperature in the vehicle compartment or the blowout temperature to the temperature setting volume 3.
The reheat amount (the opening degree of the air mix door 21) is controlled so as to reach the set temperature set in step 1. In this case, it is also possible to determine the reheat amount in consideration of the engine cooling water temperature, ON / OFF of the thermostat, and the like.

On the other hand, the air conditioning in the cabin of the vehicle air conditioner 9 is determined by the temperature and humidity in the cabin. That is, the air conditioning in the vehicle compartment is performed by controlling the temperature in the vehicle compartment or the temperature of the air blown out from the air ventilation passage 22 into the vehicle interior, the humidity in the vehicle, or the blowout of the air blowing out from the air ventilation passage 22 into the vehicle interior. Determined by air humidity. When controlling the temperature and humidity in the vehicle interior, first, the minimum rotational speed of the electric compressor 10 is determined in advance by a test or the like in order to keep the interior of the vehicle at a humidity that does not cause discomfort. The minimum rotation speed of the electric compressor 10 tends to increase as the humidity increases and as the temperature increases.

Next, FIG. 9 shows the minimum number of revolutions of the electric compressor 10 obtained by a test in advance in order to keep the interior of the vehicle at a humidity that does not cause discomfort. That is, the relationship between the vehicle interior temperature, the vehicle interior humidity, and the minimum rotation speed (Fmi) of the electric compressor 10 is as follows from FIG. An example of the relationship between the vehicle interior temperature, the vehicle interior humidity and the minimum rotational speed (Fmi) of the electric compressor 10 as a function of the minimum rotation speed Fmi of the electric compressor 10 and the temperature and humidity is as follows. When the vehicle interior humidity is 50%, the minimum rotation speed of the electric compressor 10 is 600 rpm, the vehicle interior temperature is 5 ° C.,
When the vehicle interior humidity is 60%, the minimum rotation speed of the electric compressor 10 is 600 rpm, when the vehicle interior temperature is 5 ° C, and when the vehicle interior humidity is 70%, the minimum rotation speed of the electric compressor 10 is 6 rpm.
When the motor room temperature is 5 ° C. and the vehicle interior humidity is 80%, the minimum rotation speed of the electric compressor 10 is 1200 rpm.
m.

When the vehicle interior temperature is 15 ° C. and the vehicle interior humidity is 80%, the minimum rotation speed of the electric compressor 10 is 15
00 rpm, vehicle interior temperature 25 ° C, vehicle interior humidity 80%
, The minimum rotation speed of the electric compressor 10 is 2400r
pm, the temperature inside the vehicle is 35 ° C, and the humidity inside the vehicle is 80%,
The minimum rotation speed of the electric compressor 10 is 3300 rpm. When the temperature of the air blown from the air passage 22 to the vehicle interior is not the set value, the opening degree of the air mix door 21 is calculated in the same manner as described above (PI control or the like). The reheat amount is controlled by the control to control the temperature of the air blown into the vehicle interior.

In this case, as in FIG. 8, if the temperature blown out of the air ventilation passage 22 into the vehicle interior is not the set temperature set by the temperature setting volume 31, the reheat amount is calculated (PI control or the like), and The temperature of the air blown into the vehicle compartment is controlled. When the controller 28 controls the temperature inside the vehicle compartment or the temperature of the air blown out from the air ventilation passage 22 into the vehicle interior, the reheating is performed so that the vehicle interior temperature or the air outlet temperature becomes a set value. The amount (opening degree of the air mix door 21) is controlled. In this case, the minimum number of revolutions of the electric compressor 10 that can control the interior of the vehicle to a comfortable humidity is determined in advance, and the controller 28 controls the reheat amount when the interior of the vehicle cools below the set temperature. In this case, the reheat amount can be determined in consideration of the engine cooling water temperature, ON / OFF of the thermostat, and the like.

Next, control of the temperature and humidity of the air blown by the air conditioner 9 for a vehicle will be described with reference to the flowchart of FIG. It is assumed that the temperature and humidity of the air blown out from the air passage 22 into the vehicle interior are set to predetermined set values in the control device 28 in advance. First, in step S1, when the humidity detected by the in-vehicle humidity sensor 36 is higher than a predetermined unpleasant humidity, the control device 28 proceeds to step S2, where the controller 28 adjusts the rotation speed of the electric compressor 10 (indicated as frequency in the figure) (in this case, electric motor). The number of revolutions of the compressor 10 is increased to increase the number of revolutions of the electric compressor 10), the humidity is reduced by dehumidifying by increasing the cooling capacity, and the process proceeds to step S3.

In step S3, when the rotation speed of the electric compressor 10 increases and the temperature detected by the blow-out temperature sensor 32 becomes lower than a predetermined set value, the controller 28 moves the opening of the air mix door 21 away from the heater core 23. The temperature of the air blown into the cabin is increased by reheating so that the temperature in the cabin is not excessively reduced, and the process returns to step S1 to execute steps S1, S2, and S3 again. That is, when the humidity in the cabin is higher than the unpleasant humidity, the control device 28 executes a humidity-priority control mode for controlling the rotation speed of the electric compressor 10 so as to reduce the humidity in the cabin.

If the humidity detected by the in-vehicle humidity sensor 36 is lower than the predetermined unpleasant humidity in step S1, the control device 28 proceeds to step S4, and adjusts the rotation speed of the electric compressor 10 (indicated as frequency in the figure). In this case, the rotation speed of the electric motor 11 is reduced), and the cooling capacity is reduced to control the temperature in the vehicle interior. Next, in step S5, the control device 28
When the temperature detected by the blow-out temperature sensor 32 is higher than a predetermined set value even when the rotation speed of the electric compressor 10 is controlled, the air mixing door 21 is brought into close contact with the heater core 23 to control the temperature in the vehicle compartment due to reheating. Instead, the process returns to step S1, and executes steps S1, S2, S3 or steps S1, S4, S5 again. That is, the control device 28
When the humidity in the passenger compartment is lower than a predetermined unpleasant humidity determined by the temperature in the passenger compartment, the compressor 10 controls the temperature inside the passenger compartment to the set temperature set by the temperature setting volume 31 without reheating by the heater core 23. A temperature-priority control mode for controlling the number of rotations is executed.

Next, the temperature priority control mode will be described in detail with reference to the flowchart of FIG. It is assumed that the minimum number of revolutions of the electric compressor 10 with respect to the temperature and humidity in the vehicle compartment is determined in advance. First, step S10
Then, the controller 28 calculates the set temperature of the outlet air temperature of the evaporator 19 and proceeds to step S11, where the controller 28 calculates the rotation speed of the electric compressor 10 so that the outlet air temperature of the evaporator 19 becomes the set value. To step S12. In step S12, the control device 28 obtains the minimum rotation speed of the electric compressor 10 from the temperature and humidity in the vehicle compartment, and proceeds to step S13.

In step S13, when the rotation speed of the electric compressor 10 is lower than the minimum rotation speed, the control device 28 proceeds to step S14, and controls the rotation speed of the electric compressor 10 at the minimum rotation speed. That is, the control device 28 rotates the rotation speed of the electric compressor 10 at the minimum rotation speed in step S14. Next, in step S15, the control device 2
Reference numeral 8 denotes the amount of reheating by adjusting the opening of the air mix door 21 so that the temperature of the air blown into the passenger compartment from the air ventilation passage 22 detected by the blowout temperature sensor 32 becomes the set temperature set by the temperature setting volume 31. Control. That is,
The controller 28 controls the amount of reheating so that the temperature in the passenger compartment becomes the set temperature in step S15, and returns to step S10 to return to step S10 so that the temperature in the passenger compartment becomes the predetermined set temperature.
Repeat up to 15.

In step S13, if the rotation speed of the electric compressor 10 is higher than the minimum rotation speed, the control device 28 proceeds to step S16.
The electric compressor 10 is controlled at the calculated number of revolutions so that the outlet temperature of the compressor becomes a predetermined set value, and step S15 is performed.
Proceed to. Thereafter, as described above, the control device 28 operates from step S10 to step S15 so that the temperature in the vehicle interior becomes a predetermined set temperature.
Repeat until

Next, the control mode of the humidity priority (including the temperature priority) will be described in detail with reference to the flowchart of FIG. First, in step S20, the control device 28 determines that the humidity is h
If it is higher than (T), the process proceeds to step S21, where the rotation speed of the electric compressor 10 is controlled so that the humidity becomes h (T) -Δh1, and then in step S22, the control device 28 blows the air from the air passage 22 into the vehicle interior. The reheating amount is controlled by adjusting the opening of the air mix door 21 so that the temperature of the blown air reaches the set value, and the process proceeds to step S23. In step S23, the control device 28 determines that the humidity is h (T).
If it is higher than -Δh2, the process returns to step S21 and repeats until step S23.
When it is lower than (T) -Δh2, the process returns to step S20, and when the humidity is higher than h (T), steps S21 to S23 are repeated.

If the humidity is lower than h (T) in step S20, the control device 28 proceeds to step S24 to determine the set temperature of the air temperature at the outlet of the evaporator 19, and proceeds to step S25.
Proceed to. In step S25, the rotation speed of the electric compressor 10 is controlled so that the outlet air temperature of the evaporator 19 becomes a set value, and the process proceeds to step S26.

If it is determined in step S26 that the temperature in the vehicle compartment has been cooled from the set temperature by controlling the rotation speed of the electric compressor 10, and the electric compressor 10 has stopped, the process proceeds to step S27. In step S27, the control device 28 controls the reheating amount by adjusting the opening of the air mix door 21 so that the temperature of the air blown out from the air passage 22 into the vehicle compartment becomes a set value, and returns to step S20. Is h
If lower than (T), step S20, step S24
Steps S27 to S27 are repeated.

If the temperature inside the vehicle compartment is not cooled to the set temperature even if the vehicle interior is cooled by controlling the rotation speed of the electric compressor 10 in step S26, and the electric compressor 10 does not stop, the process proceeds to step S28, and the reheat amount To 0
(Stop reheat) and return to step S20.
Each of the above steps is repeated so that the temperature and humidity in the passenger compartment become comfortable. This allows the control device 28 to cool the vehicle interior at a predetermined set temperature while maintaining the vehicle interior at a comfortable humidity. In this case, in FIG. 12, steps S21 to S23 are performed with priority given to humidity, and step S2 is performed.
Steps 4 to S27 are temperature-priority controls.

When the above control is used in combination with a current control device (current car air conditioner control device in the figure) 47 and an electric car air conditioner control device 48, the result is as shown in FIG.
The current car air conditioner control device 47 includes an air outlet temperature sensor 32, an evaporator outlet air temperature sensor 45, an outside air temperature sensor 46, a solar radiation amount detection sensor 34, and an in-vehicle temperature sensor. In this case, the air temperature sensor 32 also serves as an in-vehicle temperature sensor), an ACSW (air conditioner switch) 29 for turning on / off the air conditioner 9, and a fan SW.
A (fan switch) 30, a temperature setting volume 31 for setting the temperature in the passenger compartment to a predetermined set temperature, and an information sensor 38 from the vehicle side such as a cooling water temperature, an engine speed, and a thermostat ON / OFF are connected.

Based on the information detected by these sensors, the current car air conditioner controller 47
2, control of the amount of air blown into the vehicle interior, control of the opening degree of the air mix door 21, control of the rotation speed of the indoor blower 20 (indoor fan), control of the rotation speed of the outdoor blower 14 (outdoor fan), and cooling water The temperature of the vehicle or the temperature inside the vehicle is displayed. In addition, although the inside temperature sensor is the blowout temperature sensor 32, the inside air temperature may be converted by converting the air temperature at the outlet of the evaporator 19.

The sensors connected to the current car air conditioner controller 47 are input in parallel to the electric car air conditioner controller 48, the in-vehicle humidity sensor 36 for detecting the temperature in the cabin, and the outlet of the condenser 13. An evaporator temperature sensor 44 for detecting the air temperature (COND output temperature in the figure), a power element temperature sensor 43 for detecting the temperature of the power element, and an outlet air temperature sensor 42 for detecting the outlet air temperature of the electric compressor 10 (DIS in the figure) ), An inlet refrigerant temperature sensor 41 for detecting the inlet refrigerant temperature of the electric compressor 10
(SUC temperature in the figure), an input current sensor 40 for detecting an input current, and the like are connected. Further, a set temperature sensor 25 for detecting a set temperature in the vehicle compartment (in this case, an outlet air temperature at the evaporator 19) is connected.

The electric car air conditioner controller 48 controls the number of revolutions of the electric compressor 10, the number of revolutions of the indoor blower 20, and the like based on the information detected by these sensors.
Rotation speed control of the outdoor blower 14, opening degree control of the expansion valve 18,
In addition to controlling the rotation speed of the power element cooling water pump and the fan, the temperature of the cooling water, the temperature in the vehicle compartment, and the like are displayed. As described above, in the control device in which the current car air conditioner control device 47 and the electric car air conditioner control device 48 are combined, the current car air conditioner control device 47 controls the amount of air blown from the outlet of the air ventilation passage 22 into the vehicle compartment, Opening control of air mix door 21, indoor blower 20 (indoor fan)
Control of the number of rotations of the outdoor blower 14 (outdoor fan), display of the temperature of the cooling water or the temperature of the vehicle interior, etc., and control of the rotation speed of the electric compressor 10 by the electric car air conditioner control device 48, In addition to controlling the number of rotations of 20, the number of rotations of the outdoor blower 14, the degree of opening of the expansion valve 18, the number of rotations of the power element cooling water pump and the fan, the temperature of the cooling water and the temperature in the passenger compartment are displayed. I have. Thereby, the control device controls the interior of the vehicle to a comfortable humidity and temperature.

The current car air conditioner control device 4
7 and the electric car air conditioner control device 48 are used in combination, the functions of the current car air conditioner control device 47 and the electric car air conditioner control device 48 are duplicated, so that the cost of the control device itself increases. Therefore, a control device 28A in which a modification of the current car air conditioner control device 47 and the new controller 50 of the present invention are combined will be described below. Based on the current car air conditioner control device 47 (current controller), the rotation speed control unit of the electric compressor 10 is deleted, and the required blow-out temperature is calculated from the input outside air temperature, solar radiation, vehicle interior temperature, set temperature, and the like. A modification is made so that the opening of the air mix door 21 can be controlled based on the calculated required blowing temperature and the outlet air temperature of the evaporator 19 (FIG. 14). Then, the fan SW (fan switch) 30,
A connection line 26 for outputting data of an AC switch (air conditioner switch) 29 and data of a required blowing temperature and the like is connected.

Next, a new electric car air conditioner control device 48A of the present invention used in combination with the modified car air conditioner control device 47A will be described with reference to FIG. The new electric car air conditioner controller 48A includes an evaporator temperature sensor 44 for detecting the outlet air temperature of the condenser 13 and an outlet air temperature sensor 42 for detecting the outlet air temperature of the electric compressor 10 (DI in the figure).
S), an inlet refrigerant temperature sensor 41 (SUC temperature in the figure) for detecting an inlet refrigerant temperature of the electric compressor 10, a power element temperature sensor 43, an input current sensor 40 for detecting an input current, and an in-vehicle humidity sensor 36 are connected. Is done. In addition, connection lines 26A capable of inputting data such as an AC switch, a fan SW, an evaporator temperature, a required blowing temperature, and a vehicle interior temperature are connected.

Then, the modified car air conditioner controller 47A
And the new electric car air conditioner control device 48A are connected to complete the control device 28A (FIG. 16). In this case, the connection line 26 connected to the modified car air conditioner control device 47A and the corresponding connection line 26A connected to the new electric car air conditioner control device 48A are respectively connected. Thus, the control device 28A can control the air conditioning of the vehicle by controlling the air conditioner 9 for the vehicle similarly to the control device 28 described above. As described above, since the vehicle air conditioner 9 is controlled by the control device 28A that connects the modified car air conditioner control device 47A and the new electric car air conditioner control device 48A, the cost of the vehicle air conditioner 9 is reduced. It is possible to greatly reduce.

As described above, the control device 28 (28A)
When the humidity in the vehicle compartment is lower than a predetermined unpleasant humidity determined by the temperature in the vehicle compartment, a temperature-priority control mode for controlling the rotation speed of the electric compressor 10 (electric motor 11) so that the temperature in the vehicle compartment is set to the set temperature. Is executed, and when the humidity in the cabin is higher than the unpleasant humidity, a humidity-priority control mode for controlling the rotation speed of the electric compressor 10 so as to reduce the humidity in the cabin is executed. It is possible to always control the inside of the vehicle to a comfortable temperature and humidity regardless of whether the humidity in the room is lower than the unpleasant humidity or the humidity in the vehicle is higher than the unpleasant humidity. Thereby, the air conditioner for a vehicle can perform efficient air conditioning by controlling the rotation speed of the electric compressor 10.

In the embodiment, the rotation of the electric compressor 10 is controlled by detecting the temperature of the outlet air of the evaporator 19 and the temperature of the temperature sensor 32 for blowing air from the air passage 22 into the vehicle interior. However, the electric compressor 10 may be controlled only by the temperature of the outlet air from the evaporator 19 or only by the temperature detected by the temperature sensor 32 for blowing air from the air passage 22 into the vehicle interior. In this case, the electric compressor 10 is controlled by converting the detected temperature into the vehicle interior temperature.

In the embodiment, the vehicle is described as a hybrid car (HEV). However, the vehicle is not limited to the hybrid car (HEV), and is driven by an electric vehicle (EV), a fuel cell vehicle (FCEV), or an electric motor. The present invention is effective even when the automotive air conditioner 9 according to the present invention is applied to a normal automobile equipped with an electric compressor.

[0063]

As described above, according to the first aspect of the present invention, a refrigeration cycle including a compressor, an outdoor heat exchanger, an indoor heat exchanger, and the like, an electric motor for driving the compressor, and an indoor motor A blower for supplying air cooled by the heat exchanger into the vehicle interior, a temperature sensor for detecting a temperature of the interior of the vehicle substantially, a humidity sensor for detecting a humidity of the interior of the vehicle substantially, and each of these sensors A control device for controlling the operation of the electric motor based on the output of
When the humidity in the vehicle interior is lower than a predetermined unpleasant humidity determined by the temperature in the vehicle interior, the control device controls the rotation speed of the electric motor so that the temperature in the vehicle interior is set to the set temperature. And when the humidity in the cabin is higher than the unpleasant humidity, a humidity-priority control mode for controlling the rotation speed of the electric motor to reduce the humidity in the cabin is executed. Irrespective of the case where the humidity of the vehicle is lower than the unpleasant humidity or the case where the humidity of the vehicle interior is higher than the unpleasant humidity, it is possible to always control the interior of the vehicle to a comfortable temperature and humidity. As a result, the vehicle air conditioner can perform efficient air conditioning by controlling the number of revolutions of the compressor, and can use energy efficiently and increase the energy saving effect. Therefore, the convenience of the vehicle air conditioner can be greatly improved by maintaining the interior of the vehicle at a comfortable temperature and humidity.

According to the second aspect of the present invention, in addition to the above, a heating means for heating the interior of the vehicle is provided, and the control device reduces the temperature of the interior of the vehicle when executing the humidity priority control mode. Since the heating capacity of the heating means is controlled to the set temperature, the interior of the vehicle can be maintained at a comfortable temperature and humidity while preventing the interior of the vehicle from being too cold. As a result, it is possible to perform air conditioning in the vehicle cabin without impairing comfort even in terms of temperature. Therefore, the interior of the vehicle can be maintained at a comfortable temperature, and the convenience of the automotive air conditioner can be greatly improved.

According to the invention of claim 3, according to claim 2,
In addition, the control device, when executing the temperature-priority control mode, when the electric motor is operating, stops heating by the heating means, when the electric motor is stopped,
Since the heating capacity of the heating means is controlled so that the temperature in the passenger compartment is set to the set temperature, when executing the humidity-priority control mode, the heating in the passenger compartment is minimized to perform efficient air conditioning. It becomes possible. Therefore, it is possible to greatly save energy.

Further, according to the invention of claim 4, a refrigeration cycle comprising a compressor, an outdoor heat exchanger, an indoor heat exchanger, etc., an electric motor for driving the compressor, and cooling by the indoor heat exchanger A blower for supplying the air to the vehicle interior, a temperature sensor for substantially detecting the temperature in the vehicle interior, a humidity sensor for substantially detecting the humidity in the vehicle interior, and based on the outputs of these sensors. A control device for controlling the operation of the electric motor, wherein the control device is determined by the temperature and humidity in the cabin and holds data on the minimum rotational speed of the electric compressor capable of maintaining a predetermined comfortable humidity in the cabin. And calculating the number of revolutions of the electric compressor for setting the temperature in the passenger compartment to the set temperature, and when the calculated number of revolutions is equal to or more than the minimum number of revolutions,
A temperature-priority control mode for controlling the operation of the electric compressor at the calculated rotation speed is executed, and when the calculated rotation speed is lower than the minimum rotation speed, the operation of the electric compressor is stopped at the minimum rotation speed. Since the humidity priority control mode to be controlled is executed, the temperature and humidity in the vehicle compartment are always kept comfortable regardless of whether the vehicle interior humidity is lower than the unpleasant humidity or the vehicle interior humidity is higher than the unpleasant humidity. It becomes possible to control efficiently. As a result, the vehicle air conditioner can efficiently perform air conditioning in the vehicle cabin by controlling the rotation speed of the compressor, and can simplify the control. Therefore, the convenience of the air conditioner for a vehicle can be greatly improved.

According to a fifth aspect of the present invention, in addition to the fourth aspect, a heating means for heating the vehicle interior is provided, and the control device executes the humidity priority control mode.
Since the heating capacity of the heating means is controlled so that the temperature in the passenger compartment is set to the set temperature, the passenger compartment can be maintained at a comfortable temperature and humidity while preventing the passenger compartment from becoming too cold. As a result, it is possible to perform air conditioning in the vehicle cabin without impairing comfort even in terms of temperature. Therefore, the interior of the vehicle can be maintained at a comfortable temperature, and the convenience of the automotive air conditioner can be greatly improved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an air conditioner for a vehicle for explaining the present invention.

FIG. 2 is an explanatory diagram of a control device when the air conditioner for a vehicle is controlled by one controller.

FIG. 3 is a diagram showing a relationship between humidity and temperature at which discomfort is felt.

FIG. 4 is a diagram illustrating control of the evaporator outlet air temperature from the evaporator outlet air temperature and a set value.

FIG. 5 is a diagram showing a correlation between the temperature in the vehicle interior and the outlet air temperature of the evaporator.

FIG. 6 is a diagram illustrating control of the blowout temperature and the vehicle interior temperature from the blowout temperature, the vehicle interior temperature, and a set value.

FIG. 7 is a diagram illustrating control of the humidity in the vehicle compartment when the humidity is h (T) -Δh1.

FIG. 8 is a diagram illustrating control of the blow-out temperature from the blow-out temperature and a set value.

FIG. 9 is a diagram showing the relationship between the vehicle interior temperature, the vehicle interior humidity, and the minimum rotation speed (Fmi) of the electric compressor.

FIG. 10 is a flowchart illustrating control of air blowing temperature and humidity.

FIG. 11 is a flowchart of a temperature priority control mode.

FIG. 12 is a flowchart of a humidity priority control mode.

FIG. 13 is a block diagram of a control device (a combination of a current control device and an electric car air conditioner control device) of an air conditioner for a vehicle.

FIG. 14 is a block diagram of a current car air conditioner control device and a modified car air conditioner control device modified.

FIG. 15 is a block diagram of a new electric car air conditioner control device used in combination with the modified car air conditioner control device of FIG. 14;

FIG. 16 shows the modified car air conditioner control device of FIG. 14 and FIG.
FIG. 2 is a block diagram of a control device that combines the new electric car air conditioner control device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 9 air conditioner 10 electric compressor 11 electric motor 13 condenser 14 blower 19 evaporator 20 blower 21 air mix door 22 air ventilation path 23 heater core 28 control device 32 blowout temperature sensor 33 vehicle temperature sensor 36 vehicle humidity sensor

 ──────────────────────────────────────────────────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 2-5-2 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 1-7-2, Nishi-Shinjuku, Shinjuku-ku, Tokyo F-term in Fuji Heavy Industries Co., Ltd. 3L011 AC00 AN00

Claims (5)

[Claims] 1. An air conditioner for air-conditioning a vehicle interior of an automobile, comprising: a refrigeration cycle including a compressor, an outdoor heat exchanger, an indoor heat exchanger, and the like; an electric motor for driving the compressor; A blower for supplying air cooled by the heat exchanger into the vehicle interior; a temperature sensor for detecting a temperature of the interior of the vehicle substantially; a humidity sensor for detecting a humidity of the interior of the vehicle substantially; A control device for controlling the operation of the electric motor based on the output of each of the sensors, wherein the control device is configured to control when the humidity in the cabin is lower than a predetermined uncomfortable humidity determined by the temperature in the cabin. Executing a temperature-priority control mode for controlling the rotation speed of the electric motor so that the temperature in the vehicle compartment is set to a set temperature;
When the humidity in the cabin is equal to or higher than the unpleasant humidity, a humidity-priority control mode for controlling the rotation speed of the electric motor to reduce the humidity in the cabin is executed. apparatus. 2. A heating device for heating the interior of the vehicle, wherein the control device controls the temperature of the interior of the vehicle to the set temperature when executing the humidity-priority control mode. The vehicle air conditioner according to claim 1, wherein the heating capacity is controlled. 3. The control device, when executing the temperature-priority control mode, stops heating by the heating means when the electric motor is operating, and stops when the electric motor is stopped. The air conditioner for a vehicle according to claim 2, wherein the heating unit controls the heating capacity of the heating unit so that the temperature in the vehicle compartment is set to the set temperature. 4. An air conditioner for air-conditioning the cabin of an automobile, comprising: a refrigeration cycle including a compressor, an outdoor heat exchanger, an indoor heat exchanger, and the like; an electric motor for driving the compressor; A blower for supplying air cooled by a heat exchanger into the vehicle interior; a temperature sensor for detecting a temperature of the interior of the vehicle substantially; a humidity sensor for detecting a humidity of the interior of the vehicle substantially; A control device for controlling the operation of the electric motor based on the output of each of the sensors, wherein the control device is determined by the temperature and humidity in the cabin, and can maintain a predetermined comfortable humidity in the cabin. While retaining data on the minimum rotation speed of the electric compressor, the rotation speed of the electric compressor for calculating the temperature in the cabin to a set temperature is calculated. If the calculated rotation speed is equal to or higher than the minimum rotation speed, a temperature-priority control mode for controlling the operation of the electric compressor is executed at the calculated rotation speed, and the calculated rotation speed is reduced to the minimum rotation speed. If the number is lower than the number, a humidity-priority control mode for controlling the operation of the electric compressor at the minimum rotation speed is executed. 5. A heating unit for heating the interior of the vehicle, wherein the control unit controls the temperature of the interior of the vehicle to the set temperature when executing the humidity priority control mode. The vehicle air conditioner according to claim 4, wherein the heating capacity is controlled.