JP3309528B2 - Vehicle air conditioner - Google Patents

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 for dehumidifying blown air when a window glass of a vehicle becomes cloudy.

[0002]

2. Description of the Related Art Conventionally, as a vehicular air conditioner, when the window glass becomes cloudy by detecting or estimating the humidity in the vehicle cabin, the outlet temperature of the evaporator is reduced to a predetermined anti-fog setting temperature. A cooling configuration is provided. In other words, the fogging of the window glass depends on the environmental conditions of the outside air temperature and the vehicle interior humidity. This dehumidifies and cools the blown air. In this case, since it is necessary to maintain the temperature in the vehicle interior at the set temperature, the air blown into the vehicle interior is once cooled to a predetermined anti-fog setting temperature and then raised to the target blowing temperature by the heater core.

[0003]

By the way, when water drops adhere to the window glass due to rainy weather, the surface temperature of the window glass has dropped to substantially the outside air temperature, so that the window temperature is lower than when the weather is not rainy. The glass is easily fogged. However, in the above conventional example, since the fogging conditions for determining that the window glass is fogged regardless of the weather are the same, the window glass is easily fogged in rainy weather irrespective of the dehumidification airflow, and the fogging prevention There is a disadvantage that the effect is inferior. In this case, by setting the fogging conditions loosely, the anti-fogging effect can be reliably obtained even in rainy weather, but with such a setting, the compressor is unnecessary even in fine weather where the window glass does not fog. Since it is driven, the fuel saving effect is inferior.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a configuration in which, when a window glass of a vehicle is in a cloudy condition, the air blown into the vehicle compartment is once cooled to a predetermined temperature and dehumidified. It is an object of the present invention to provide an air conditioner for a vehicle that can achieve fuel saving while reliably preventing fogging.

[0005]

A vehicle air conditioner according to the present invention is provided with a duct for guiding air into a vehicle interior, and includes an evaporator for cooling and dehumidifying air passing through the duct in accordance with driving of a compressor. A dehumidifying means having a dehumidifying means, and an outlet temperature adjusting means for adjusting the temperature of the air blown into the passenger compartment through the dehumidifying means. The target outlet temperature is determined according to various conditions, and the outlet temperature into the passenger compartment is adjusted to the target outlet temperature. Providing first control means for controlling the blow-out temperature adjusting means to be at a temperature, and operating for controlling the temperature in the vehicle interior;
Driving for controlling the comfortable humidity in the cabin,
The anti-fog control when the lath is cloudy
To perform each operation for the compressor
A second control means for driving the providing, on which is provided a cloudy condition changing means changes the fogging conditions in the second control means in accordance with whether it rains, the second control means,
The temperature of the evaporator is controlled based on the target outlet temperature.
Set temperature calculation for calculating set temperature (TE1)
Means and settings for comfort humidity control of the evaporator
Second set temperature calculating means for calculating the temperature (TE2);
Using the fogging condition changed by the fogging condition changing means
To determine whether the window glass is cloudy or not.
The anti-fogging control of the evaporator based on the
Set temperature calculation for calculating the set temperature (TE3)
Means and temperature control obtained by the first set temperature calculating means
Temperature (TE1) for calculating the second set temperature
Set temperature for comfortable humidity control determined by means (TE2)
And the anti-fogging control obtained by the third set temperature calculating means.
Based on the minimum value of the set temperature (TE3)
A driving means for driving the compressor is provided.

[0006]

The first control means obtains a target blowout temperature in accordance with various conditions and drives the blowout temperature adjusting means so as to attain the target blowout temperature. At this time, the second control means is a vehicle
Driving for temperature control inside the vehicle
Driving, fogging conditions where the window glass in the vehicle interior was fogged
Each run for anti-fog control
To drive the compressor.

The fogging condition changing means changes fogging conditions in the second control means depending on whether it is rainy or not.
Here, the driving means is determined by the first set temperature calculating means.
Set temperature (TE1) for temperature control and second set temperature
Set temperature (TE
2) and the anti-fogging control obtained by the third set temperature calculating means.
Based on the minimum value of the set temperature (TE3)
Drive the presser. Therefore, even in an environment in which the window glass is easily fogged by rain, the fogging condition is changed, so that fuel saving can be achieved while reliably preventing fogging.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an air conditioner for an automobile will be described below with reference to the drawings.

FIG. 1 shows an overall functional block configuration. In an air duct 1 arranged at a front portion of a vehicle compartment (not shown), an inside / outside air switching damper 2 is rotatably provided at an upstream entrance thereof. The blower 3 is provided on the downstream side. The inside / outside air switching damper 2 is driven by a servomotor 2a, and switches the air intake port to either the inside air introduction port 4a or the outside air introduction port 4b. The blower 3 is driven to rotate by a blower motor 5, and sucks air from either the inside air inlet 4a or the outside air inlet 4b, and sends the air downstream.

The evaporator 6 as a dehumidifying means includes a blower 3
, Which cools the air sent by the blower 3 and sends it to the downstream side, and is one of the elements constituting the refrigeration cycle 7. The refrigeration cycle 7 is connected to the evaporator 6 via the compressor 8, the condenser 9, the receiver 10 and the expansion valve 11.
The cooling function of the evaporator 6 can be obtained by the operation of the compressor 8.

An air mix damper 12, which is a blowing temperature adjusting means, is rotatably provided downstream of the evaporator 6, and is driven by a servo motor 12a. On the downstream side of the air mix damper 12, a heater core 13 constituting a dehumidifying unit together with the evaporator 6 is provided so as to occupy a part of the air duct 1. The heater core 13 heats the air using cooling water of an engine (not shown) as a heat source, and heats the cool air sent from the evaporator 6.
The air mix damper 12 distributes the cool air sent from the evaporator 6 to the heater core 13 and the bypass passage 14 according to the opening set by the servo motor 12a.

On the outlet side of the air duct 1, there are provided three outlets, a defrost outlet 15, a face outlet 16 and a foot outlet 17, corresponding to the respective defrost outlet dampers 18, face blowers. Exit damper 19
And a foot outlet damper 20. Each of the outlet dampers 18 to 20 is a servo motor 18a to 20a.
Driven by

The defrost air outlet 15 is arranged toward the surface of the window glass 21 on the vehicle interior side, and the servo motor 1
When the defrost outlet damper 18 is opened by 8a, the window glass 21 can be blown.

The control device 22 as the first control means, the second control means and the fogging condition changing means includes a CPU 22a,
It is configured to include a ROM 22b, a RAM 22c, and the like, and stores an automatic air conditioning control program for air conditioning control in advance. The ROM 22b stores a target outlet temperature at which the compressor 8 can be stopped in accordance with the outside air temperature and the vehicle interior humidity described later.

The output terminals A to E of the control device 22 are connected to the respective servo motors 2a, 12a, 18a, 20
a, 19a, and the output terminal F is connected to the blower motor 5 via the drive circuit 5a. Servo motor 1
An air mix damper opening sensor 12b for detecting the opening θ of the air mix damper 12 is provided at 2a, and is connected to an input terminal G of the control device 22.

An output terminal H of the control device 22 is connected to an electromagnetic clutch (not shown) of the compressor 8 via a drive circuit 8a. To drive the compressor 8. The drive circuit 8a has a function of detecting the current flowing through the coil of the electromagnetic clutch, and its output terminal is connected to the input terminal I of the control device 22.

The input terminals J to L of the control device 22 are connected to an inside / outside air changeover switch 23, a temperature setting switch 24, and a defrost mode setting switch 25 respectively arranged on an operation panel (not shown). Inside air sensor 26, outside air sensor 27, water temperature sensor 2 respectively
8, the solar radiation sensor 29, the evaporator sensor 30, the inside air humidity sensor 31, and the wiper control circuit 32.

The inside air sensor 26 and the outside air sensor 27
Detects the temperatures Tr and Tam inside and outside the vehicle, the water temperature sensor 28 detects the temperature Tw of the cooling water of the engine, the solar radiation sensor 29 detects the amount of solar radiation Ts entering the vehicle interior, and the inside air humidity sensor 31. Detects the relative humidity RHr in the vehicle compartment, and the wiper control circuit 32 outputs a wiper operation signal Sr indicating that the wiper is operating.

Next, the operation of the present embodiment will be described with reference to FIGS. When the power is turned on and the air conditioning control program is started, the control device 22 performs control according to the flowchart of FIG. That is, the control device 2
First, in step S1, an initialization process is performed to initialize various counters, flags, and the like.
Move to

The control device 22 determines in step S2
The set temperature Tset is read from the temperature setting switch 24, and R
Store it in the AM 22c. Subsequently, in step S3, the control device 22 reads detection signals from various sensors in order to detect a vehicle environmental condition. That is, the control device 22
The inside air temperature (room temperature) Tr from the inside air sensor 26, the outside air temperature Tam from the outside air sensor 27, the engine cooling water temperature Tw from the water temperature sensor 28, the solar radiation amount Ts from the solar radiation sensor 29, the outlet temperature Te of the evaporator 6 from the evaporator sensor 30.
, Relative humidity RHr in the passenger compartment from the inside air humidity sensor 31,
The input state of the wiper operation signal Sr is read from the wiper control circuit 32 and stored in the RAM 22c.

Next, in step S4, the control device 22 reads out the ROM 22b based on the read various data.
The target outlet temperature Tao is calculated by an arithmetic expression stored in advance in
Is calculated. In this case, the data is set temperature Tset
, The inside air temperature Tr, the outside air temperature Tam, and the amount of solar radiation Ts, and by substituting it into an arithmetic expression represented by the following equation (1), the above-described target outlet temperature Tao is obtained.

Tao = A × Tset + B × Tr + C × Tam + D × Ts + E (1) (where A to E are arbitrary constants for setting the gain.) Subsequently, the control device 22 proceeds to step S5. , Set temperature Tset read and stored in steps S2 and S3
And the blower voltage Ve is set based on detection signals from various sensors for detecting the environmental state. This blower voltage V
e is a voltage applied to the blower motor 5 via the drive circuit 5a in order to set the amount of air blown by the blower 3.

At step S6, the control device 22
ROM 2 based on various data stored in RAM 22c
The target opening degree θo of the air mix damper 12 is calculated by an arithmetic expression stored in advance in 2b. In this case, the target opening temperature Tao, the cooling water temperature Tw, and the outlet temperature Te of the evaporator 6 are substituted for the target opening degree of the air mix damper 12 by using the target blowing temperature Tao, the cooling water temperature Tw, and the outlet temperature Te. Find θo.

Θo = [(Tao−Te) / (Tw−Te)] × 100 (%) (2) Next, in step S7, the compressor 8 is driven / stopped. Then, based on the result obtained in each of the above steps, a control signal is output in step S8, and the air conditioning in the vehicle compartment is performed.

In this case, the control device 22 supplies a blower drive signal to the drive circuit 5a to drive the blower motor 5 at the blower voltage Ve, thereby operating the blower 3 at a predetermined air flow rate. Further, the control device 22 supplies an air mix damper opening control signal to the servomotor 12a, and controls the opening θ of the air mix damper 12 to be the target opening θo calculated in step S6. Further, the control device 22
Outputs an inside / outside air introduction mode control signal to the servo motor 2a to drive the inside / outside air switching damper 2 to a predetermined position.

The control device 22 then proceeds to step S9 and waits until a predetermined control cycle τ has elapsed.
The above steps are repeated again. Accordingly, the control device 22 repeatedly executes the above-described program at regular intervals, thereby performing air-conditioning control in accordance with the set temperature Tset and the vehicle environmental condition to maintain the interior of the vehicle in a comfortable state.

Now, with the air-conditioning control being performed as described above, the compressor 8 which is being performed in step S7
Will be described.

FIG. 3 shows the drive / stop processing of the compressor 8. In FIG. 3, the control device 22 calculates an outlet set temperature of the evaporator 6 (hereinafter, referred to as a post-evaporation set temperature) required when executing each control such as temperature adjustment control, comfortable humidity control, and anti-fog control. I do.

Here, the temperature adjustment control is a control for driving the compressor 8 so as to reach the post-evaporation set temperature TE1 in accordance with the target outlet temperature TAO as shown in FIG. In addition, the comfortable humidity control is to drive and stop the compressor 8 so as to reach the set temperature TE2 after the evaporation according to the vehicle interior humidity as shown in FIG. 5, and when the vehicle interior humidity exceeds the upper limit set value. Is a control for driving the compressor 8 to perform a dehumidifying operation, and stopping the compressor 8 when the vehicle interior humidity is equal to or lower than the lower limit set value. And anti-fog control is
As shown in FIG. 6, when the vehicle interior humidity reaches the cloudy limit indoor humidity relative to the outside air temperature, the compressor 8 is controlled so as to reach the post-evaporation set temperature TE3.

The fogging of the window glass 21 will now be described. The fogging phenomenon (occurrence of fogging) of the window glass 21 is caused by the glass surface temperature Tw and the dew point temperature Td of the air in contact with the glass surface temperature Tw. That is, when Tw <Td, dew forms on the window glass 21 and fogging occurs. Here, the glass surface temperature Tw and the dew point temperature Td can be calculated by the following arithmetic expressions.

Tw = f (Tam, Tr, αam, αr, v, δ, λ) (3) Td = f (xr) (4) (where αam is the thermal conductivity outside the vehicle and αr is 6 is the thermal conductivity of the room, v is the vehicle speed, δ is the thickness of the windshield, λ is the thermal conductivity of the glass, and xr is the absolute humidity of the room (see FIG. 7). The correlation between the outside air temperature obtained on the basis of (4) and the fogging limit indoor humidity of the window glass 21 is shown at the time of rainy weather and at times other than rainy weather, respectively.

By the way, in rainy weather, water droplets adhere to the surface of the window glass 21 and the glass surface temperature can be regarded as the outside air temperature. For this reason, in the rainy weather and the environment other than the rainy weather, various thermal conductivities change as is apparent from the above equation (3), so that the cloudy limit indoor humidity characteristic with respect to the outside air temperature changes as shown in FIG. That is, in the case of the same outside air temperature, it can be seen that the cloudy limit indoor humidity is lower in rainy weather than in non-rainy weather, and it is easy to cloudy. Therefore, for example, when the fogging characteristic other than rainy weather shown by a solid line in FIG. 6 is used regardless of the weather, the window glass 21 may fog up in rainy weather and the anti-fog effect may be reduced. On the other hand, when the fogging characteristic at the time of rain shown by a broken line in FIG. 6 is used regardless of the weather, the window glass 21 does not fog at the time of rain, but the fogging does not occur on the window glass 21. At times, the driving time of the compressor 8 is prolonged, and the power saving effect is reduced.

However, in this embodiment, both the anti-fogging effect and the power saving effect are achieved in the following manner. That is, the control device 22 first calculates the post-evaporation set temperature TE1 necessary for the temperature control based on the characteristics shown in FIG. 4 (step S701). Subsequently, the post-evaporation set temperature TE2 required for maintaining the comfortable humidity is calculated based on the characteristics shown in FIG. 5 (step S702).

Next, the controller 22 calculates the post-evaporation set temperature TE3 required for the anti-fogging control in the following procedure. First, it is determined whether or not it is rainy based on the input state of the wiper operation signal Sr from the wiper control circuit 32 (step S70).
3). At this time, when the wiper operation signal Sr is not input, it can be determined that the weather is not rainy, so that the fogging determination is performed using the fogging characteristics other than rainy weather indicated by a solid line in FIG. 6 (step S704). On the other hand, the wiper operation signal Sr
Is entered, it can be determined that it is raining,
Using the fogging characteristic in rainy weather indicated by the broken line in FIG. 6, it is determined whether or not the window glass 21 is fogged (step S7).
05).

Then, the post-evaporation set temperature TE3 is finally set based on the fogging judgment result (step S70).
6). That is, when it is determined that the window glass 21 is fogged,
TE3 is set so that the dehumidifying capacity of the compressor 8 is maximized (in this embodiment, the lowest temperature that can be set is 3).
° C). If it is determined that the window glass 21 is not clouded, TE3 is set so as to stop the compressor 8 because the dehumidifying ability of the compressor 8 is not necessary (in this embodiment, the settable maximum temperature is 99 ° C.). .

The post-evaporation set temperature obtained as described above,
That is, the control content for the compressor 8 is determined according to the minimum value among TE1 for temperature adjustment control, TE2 for maintaining comfortable humidity, and TE3 for anti-fog (step S707). In other words, in order to properly execute all controls of temperature adjustment, comfortable humidity maintenance and anti-fog, the post-evaporation set temperature is the minimum value of TE1 to TE3 obtained in steps S701, S702, and S706 (evaporation dehumidification capacity is This is because it is necessary to drive the compressor 8 so that the maximum value is obtained.

Therefore, the control device 22 first determines in steps S708 to S710 TE1, TE2, TE3.
Is compared with the current post-evaporation set temperature TE0. At this time, if the current post-evaporation set temperature TE0 is higher than the minimum value, it is necessary to change the setting of the post-evaporation set temperature TE0, so steps S708 to S71.
At 0, the minimum value is selected from TE1, TE2 and TE3. Here, when TE1 for temperature adjustment is the minimum value, it is determined in step S711 whether or not the target outlet temperature TAO is higher than the predetermined temperature α from the outside air temperature TAM which is the suction temperature of the air duct 1. , TAO> T
If AM + α, a stop process of the compressor 8 is executed in step S712.

That is, when the outside air passes through the air duct 1, the ambient temperature increases by a predetermined temperature α (for example, 5 ° C.), so that the target blowing temperature TAO is higher than the outside air temperature by a predetermined temperature. When TAO> TAM + α, the compressor 8 can be stopped.

In step S711, TAO> T
If AM + α does not hold, TE1 is set to TE0 in step S713.

On the other hand, when TE2 for maintaining the comfortable humidity is minimum, TE0 is set to TE0 in step S714, and when TE3 for antifogging is minimum, TE0 is set to TE0 in step S715 (this embodiment). Then 3
° C). After setting the post-evaporation set temperature TE0, the control device 22 executes the driving process of the compressor 8 in step S716.

After setting the post-evaporation set temperature TE0 as described above, the control device 22 returns to the main routine to control the compressor 8 so that the set post-evaporation set temperature TE0 is obtained. When the control period τ has elapsed, the drive / stop processing of the compressor 8 is executed again.
At this time, the post-evaporation set temperature TE0 calculated in the previous driving / stopping process of the compressor 8 is compared with the currently calculated minimum post-evaporation set temperature. If it is determined in step S707 that TE0 is small, the process proceeds to step S8 and proceeds to the previous operation. To continue.

According to the above configuration, the window glass 21 changes depending on the presence or absence of raindrops on the surface of the window glass 21.
The fogging judgment condition is changed according to whether or not it is rainy based on the operation state of the wiper, so that anti-fogging control is performed based on the fogging judgment condition for simply preventing fogging of the window glass regardless of the weather. Unlike the configuration in which it is performed, the fogging of the window glass 21 can be reliably removed regardless of rainy weather. Also, since such anti-fog operation is performed only in rainy weather,
The fuel-saving operation can be performed without driving the compressor 8 unnecessarily in fine weather.

In the above-described embodiment, the wiper control means 32 is used as the rainy weather detection means. However, the detection may be performed by using, for example, a capacitance sensor or an optical sensor. Means for changing each parameter shown in the equation when it rains may be used.

Further, since the glass surface temperature changes in accordance with the vehicle speed, the fogging judgment condition may be changed in accordance with the vehicle speed change.

Furthermore, control hysteresis generally used for the purpose of preventing control hunting can be employed.

[0046]

As is apparent from the above description, according to the vehicle air conditioner of the present invention, the compressor is controlled so that the cooling temperature of the dehumidifying means becomes the predetermined anti-fog setting temperature at which the window glass of the vehicle does not fog. When executing the anti-fog standby operation to be driven, the fogging condition changing means changes the fogging condition according to whether it is rainy or not, so when the window glass of the vehicle becomes cloudy, the vehicle enters the cabin. In the configuration in which the blast air is once cooled and dehumidified to a predetermined temperature, there is an excellent effect that fuel saving can be achieved while reliably preventing fogging.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an overall configuration according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a main routine operation of the control device.

FIG. 3 is a flowchart showing a subroutine operation of the control device;

FIG. 4 is a control characteristic diagram showing a relationship between a target blowout temperature and a set temperature after evaporation in temperature control.

FIG. 5 is a control characteristic diagram showing a relationship between a vehicle interior humidity and a set temperature after air evaporation in a comfortable humidity control.

FIG. 6 is a characteristic diagram showing a relationship between an outside air temperature and a fogging limit indoor humidity in anti-fogging control.

FIG. 7 is a diagram showing a temperature gradient between outside air and a room through a window glass.

[Explanation of symbols]

1 is an air duct, 6 is an evaporator (dehumidifying means), 8 is a compressor, 12 is an air mix damper (blowing temperature adjusting means), 13 is a heater core (dehumidifying means), 21 is a window glass, and 22 is a control device (first control). Means, second control means, fogging condition changing means), 31 is an inside air humidity sensor, 32
Is a wiper control circuit.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masafumi Kawashima 1-1-1, Showa-cho, Kariya-shi, Aichi Japan Inside Denso Co., Ltd. (72) Inventor Takashi Tanaka 1-1-1, Showa-cho, Kariya-shi, Aichi Japan Japan Denso Stock In-company (72) Inventor Yuichi Shirota 1-1-1, Showa-cho, Kariya-shi, Aichi Japan Inside Denso Co., Ltd. (56) References JP-A-2-45219 (JP, A) JP-A-59-14564 (JP, A JP-A-62-160943 (JP, A) JP-A-4-95523 (JP, A) JP-A-1-240317 (JP, A) Fully open 63-43811 (JP, U) Really open 42308 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60H 3/00 B60H 1/32

Claims (7)

(57) [Claims] A dehumidifier having an evaporator for cooling and dehumidifying the air passing through the duct in response to driving of a compressor; and a dehumidifier passing through the dehumidifier to drive the passenger compartment. the controls and the air temperature adjusting means for adjusting the air temperature, the air temperature regulating means so outlet temperature to the vehicle interior with obtaining the target air temperature in response to various conditions becomes the target air temperature blown into 1 control means, driving for controlling the temperature in the cabin, comfort in the cabin
Driving for humidity control, fogging of the window glass in the cabin
Operation for anti-fog control when the
Comprising a second control means for driving the compressor to perform respectively, and a cloudy condition changing means changes the cloudy <br/> Ri condition in said second control means in accordance with whether rain, The second control means controls the temperature of the evaporator based on the target outlet temperature.
Set temperature calculation for calculating set temperature (TE1)
Means and a set temperature (T) for controlling the comfortable humidity of the evaporator.
E2) using the second set temperature calculating means for calculating the fogging condition and the fogging condition changed by the fogging condition changing means.
To determine whether the window glass is cloudy or not.
The anti-fogging control of the evaporator based on the
Set temperature calculation for calculating the set temperature (TE3)
Means for controlling the temperature determined by the first set temperature calculating means.
The set temperature (TE1) is calculated by the second set temperature calculating means.
Temperature (TE2) for comfortable humidity control
Set temperature for anti-fog control obtained by set temperature calculating means of No. 3
The degree of compression (TE3).
A vehicle air conditioner comprising: a driving unit that drives the air conditioner. 2. The fogging condition changing means determines whether it is rainy or not.
If it is determined that it is not rainy, it is not rainy
In fogging the window glass with properties cloudy determining whether to
When cloudy judgment is made and it can be judged that it is rainy,
Whether or not windowpanes are fogged using the fogging characteristics in rainy weather
2. The vehicle according to claim 1, wherein the cloudiness determination is performed.
Dual use air conditioner. 3. The window according to claim 1, wherein said third set temperature calculating means includes:
If it is determined that the glass is fogged,
Settings for the anti-fog control so that the dehumidifying capacity is maximized
Set the temperature (TE3) and judge that the window glass does not fog
If so, the protection is stopped so that the compressor is stopped.
Features setting temperature (TE3) for fogging control
The vehicle air conditioner according to claim 1, wherein 4. The driving means according to claim 1 , wherein
When the set temperature (TE1) is the minimum, the target
Outside air temperature (TAM) whose temperature is the outlet temperature of the duct
It is determined whether the temperature is higher than the predetermined temperature (α).
When it is running, execute the compressor stop processing
If not, the current set temperature (TE0)
A set temperature (TE1) for the temperature control,
Based on the current set temperature (TE0)
The compressor according to claim 1, wherein the compressor is controlled.
The vehicle air conditioner according to any one of the chairs 3. 5. A set temperature (TE) for the anti-fogging control.
When 3) is minimum, set temperature for anti-fog control
Set to current set temperature (TE0) based on (TE3)
Set the minimum temperature (TEmin) and set the current
The compressor based on the current set temperature (TE0)
5. The method according to claim 1, wherein the control is performed.
An air conditioner for a vehicle as described in the above. 6. The first set temperature calculator according to claim 1, wherein
The set temperature for the temperature control (TE
1) The comfortable humidity determined by the second set temperature calculating means.
Temperature (TE2) for temperature control, the third set temperature
Temperature (T) for the anti-fogging control obtained by the temperature calculating means.
E3), the current set temperature (TE
0), and the set current set temperature (T
E0) to control the compressor based on the control cycle
After that, the compressor drive stop processing is executed again.
In the previous drive stop processing of the compressor
The current set temperature (TE0) that was set and this time calculated
Compare with the minimum value, the previous drive of the compressor
The current set temperature (TE
If it is determined that (0) is smaller, continue the previous operation
The method according to any one of claims 1 to 5, wherein
Vehicle air conditioner. 7. The driving means according to claim 1 , wherein said driving means calculates said first set temperature.
The set temperature for the temperature control (TE
1) The comfortable humidity determined by the second set temperature calculating means.
Temperature (TE2) for temperature control, the third set temperature
Temperature (T) for the anti-fogging control obtained by the temperature calculating means.
E3) and compare the minimum value with the current set temperature (TE0).
In comparison, the current set temperature (TE0) is higher than the minimum value.
If it is larger, change the current set temperature (TE0)
Select the minimum value to change the temperature
When the set temperature (TE1) is minimum, the target
The outside air temperature (TA) whose outlet temperature is the suction temperature of the duct
Determines whether the temperature is higher than the predetermined temperature (α) than M)
If it exceeds, stop the compressor.
Run, if not above the current set temperature
(TE0) is set to the set temperature (TE1) for the temperature control.
And the set temperature (TE2) for the comfortable humidity control is
When the temperature is small, the comfortable humidity is set to the current set temperature (TE0).
Set temperature (TE2) for temperature control,
When the set temperature for control (TE3) is the minimum,
Set minimum temperature (TEmin) to set temperature (TE0)
Set, and based on the set current set temperature (TE0)
To control the compressor, and that the control cycle has elapsed.
Again, the compressor drive stop processing is executed again,
Before set in the compressor drive stop processing
The current set temperature (TE0) and the minimum value calculated this time are
Compared with the previous compressor drive stop processing.
The current set temperature (TE0) that is set
If it is determined that the previous operation is continued
The air conditioner for a vehicle according to any one of claims 1 to 3,
Place.