JPH0790690B2 - Automotive air conditioner - Google Patents

Description

TECHNICAL FIELD The present invention relates to a car air conditioner control device for automatically adjusting humidity.

(Prior Art) Conventionally, in an automobile, a humidifying unit is installed to be integrated with an air conditioner unit combined with a temperature adjusting unit or independent of the unit, thereby increasing the humidity of the air inside the vehicle. Are known. Such a device has the advantages of not causing a thirst and discomfort to the occupant and of preventing the mucous membrane of the throat from drying out, especially when operating the heater in cold weather.

However, when operating the humidifying means, it is not preferable to make the vehicle compartment have a humidity higher than necessary, and it is further not preferable that the window glass is fogged during driving.

Therefore, as shown in JP-A-58-122217 (B60H3 / 00), in a car air conditioner control device equipped with a humidifier,
A mode selector is provided to detect the humidity inside the vehicle and the degree of fogging of the window glass, and the control unit ensures that the humidity in the vehicle is at the desired level under the restriction that the window glass will not fog in the driving mode. It is known to adjust the operation of the humidifier, and in the rest mode, substantially remove the above limitation to adjust the operation of the humidifier so that the humidity in the passenger compartment is at a desired level.

(Problems to be Solved by the Invention) According to the above publication, in the rest mode, the humidifier is operated only in accordance with the relative humidity regardless of the cloudiness of the window. Due to the high humidity, some passengers may find this uncomfortable. Also,
When the occupant takes a nap in the rest mode, the metabolism in the nap is reduced, and therefore it is not necessary to increase the humidity in the vehicle compartment during the nap.

The present invention has been made in view of the above points in order to obtain the optimum vehicle interior humidity in the rest mode.

(Means for Solving Problems) Therefore, the present invention, as shown in FIG. 1, includes a humidifying means for humidifying the passenger compartment, an operating means for an occupant to manually set a rest time, and an operating means for the operating means. Of the rest time set by the above, at least one of a predetermined time from the start of this rest time or a predetermined time before the end of this rest time is a predetermined capacity for the humidifying capacity of the humidifying means. And a capacity control means for controlling the capacity of the humidifying means so that the humidifying capacity of the humidifying means is lower than the predetermined capacity for the rest of the rest time. I made it the summary.

(Operation) According to the above configuration, when the occupant operates the operating means to set the rest time, of the rest time, a predetermined time from the start of the rest time or a predetermined time before the end of the rest time is set. At least one of the humidifying means is controlled so that the humidifying ability becomes a predetermined ability, and the humidifying means is controlled so that the humidifying ability becomes lower than the predetermined ability for the rest of the rest time. Is controlled.

(Effect of the invention) For example, in the rest time set by the operating means, the humidifying capacity of the humidifying means is set as a predetermined capacity for a predetermined time from the start of the rest time, and the humidifying capacity in the remaining time of the rest time is set. If the value is lower than the predetermined capacity, the humidity control in the passenger compartment is performed for a predetermined time such as from the time when the occupant starts to take a nap until the time when the occupant actually falls asleep. You can enter a nap state. Further, during the rest of the rest time, since the humidifying capacity of the humidifying means becomes lower than the predetermined capacity, it is possible to reduce the amount of water consumed during the rest time, and thereby the water tank of the humidifying means. The capacity can be reduced and the humidifying means can be downsized. Further, the humidity in the passenger compartment during rest does not become higher than necessary and the passenger's throat is not hurt.

Further, of the rest time set by the operating means, the humidifying capacity of the humidifying means is set as a predetermined capacity for a predetermined time before the rest time is completed, and the humidifying capacity in the remaining time of the rest time is set to the predetermined value. In the case of lowering the capacity than the capacity, since the humidifying capacity is lower than the predetermined capacity for the rest of the rest time, the amount of water consumed during the whole rest time is reduced as in the above case. can do. In addition, since the humidifying capacity of the humidifying means is set to a predetermined capacity for a predetermined time before the completion of the rest time, it is possible to make the cabin humidity condition after the passenger finishes rest comfortable, and the passenger is comfortable. The driving of the vehicle can be started in this state.

Of the rest time set by the operating means, the humidifying capacity of the humidifying means is set as the predetermined ability for a predetermined time from the start of the rest time and a predetermined time before the completion of this rest time, and the rest of the rest time is set. Even in the case where the humidifying capacity in the period of time is set to be lower than the predetermined capacity, the effects in each of the above cases are exhibited.

As described above, the present invention makes the humidifying capacity lower than the predetermined capacity for the rest of the rest time, so that the humidifying capacity is kept the predetermined capacity during the rest time. Compared with the case, the degree of haze of the window glass of the vehicle can be reduced. Therefore, when the occupant tries to start driving the vehicle after the rest time is completed, or when the occupant cuts off the rest and starts the driving in the middle of the rest time, the window becomes cloudy and the driving is stopped. Problems such as being unable to start can be suppressed as much as possible.

Embodiments Embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a schematic configuration diagram showing a configuration of an automobile air conditioner according to the present invention.

In FIG. 2, 1 is a duct for blowing air, 2 is a blower for blowing air, 4 is an evaporator for cooling and dehumidifying, 6 is a heater core, 8 is an air mix damper for air mix, 10 is a damper for switching inside / outside air, and 12 Is an ultrasonic oscillator 13 as a humidifier.
A humidifier equipped with water inside the water tank 14, 15 blows air after air conditioning into the passenger compartment, and a blowing duct for each application, 16 indicates the temperature inside the passenger compartment
Indoor temperature sensor that detects Tin, 18 is a semiconductor-type humidity sensor that detects the relative humidity in the passenger compartment, 20 is a rear glass, 22 is an operation switch as an operation means for setting a rest mode,
24 is a glass temperature sensor that mainly detects the inner surface temperature Tg of the rear glass 20, and 30 is an electronic control circuit that is a capacity control means that controls the amount of humidification.

The electronic control circuit 30, the well-known CPU50, ROM52, RAM54, etc.,
The indoor temperature sensor 16, the humidity sensor 18, the operation switch 22, the input port 56 for A / D-converting and inputting signals from the glass temperature sensor 24, the output port 58 for outputting a signal for driving the ultrasonic transducer 13, and the like. Each device and each port are configured to be connected to each other by a bus 59.

The electronic control circuit 30 incorporates the control program shown in FIGS. 3 and 4.

Next, the operation of this embodiment having the above configuration will be described according to the above control program.

In FIG. 3, the operation switch 22 is set to nap mode, the nap time T _R is set to an appropriate time, steps
301 performs reading of T _R, the initial step 302 value t
= 0 is set in the RAM 54, and the CPU receives the input signal from the built-in timer counter. So step 30
Proceeding to 3, the humidification amount is controlled by the control program shown in FIG. Next, when proceeding to step 304, the CPU judges the magnitude relation between the time t at that time and the set time T ₀ stored in the ROM 52, and if T ₀ > t, the process returns to step 303 and T ₀ ≤t If so, that is, if humidification is performed for the set time T ₀ from the start of the rest mode, the process proceeds to step 305 and the humidifier 12 is stopped. At this time, the inside / outside air switching damper 10 may be set to the inside air mode by a signal from the outlet port.

Next, in step 306, the magnitude relation between the time t at that time and the set time T _R is compared. If T _R −T ₀ > t, the process returns to step 305, and if T _R −T ₀ ≦ t, the process proceeds to step 307. Proceeding to, the humidification amount is controlled by the control program shown in FIG.

After that, in step 308, the time t at that time and the set time T _R
And T _R > t, the process returns to step 307, and T _R ≤
If it is t, that is, if the humidification control performed for the set time T ₀ before the end of the rest mode is completed, the process proceeds to step 309, the humidifier 12 is stopped, and the program is ended in step 310.

Next, the control program of FIG. 4 will be described. Each step of this flow chart is for carrying out the following judgment and processing.

Step 100: The vehicle interior temperature Tin detected by the room temperature sensor 16, the relative temperature RH of the vehicle interior detected by the humidity sensor 18, and the temperature Tg of the rear glass 20 detected by the glass temperature sensor 24 are input ports. Read through 56.

Step 110: The fog point temperature Td in the vehicle compartment is calculated from the vehicle interior temperature Tin and the relative humidity RH using a map stored in advance in the ROM 52.

Step 120: The glass temperature Tg is subtracted from the fog point temperature Td to calculate the supercooling degree T _S.

Step 130: Determine the degree of supercooling T _S , if T _S <0 ° C., go to step 170, and if 0 ° C. ≦ T _S <3 ° C., go to step 175, 3 ° C. ≦
If T _S , the process proceeds to step 200 and each process is judged.

Steps 170 and 175: It is judged whether the relative humidity RH in the vehicle compartment is equal to or lower than an appropriate relative humidity rho at the temperature in the vehicle compartment (equal to Tin if equilibrium is reached) selected by the occupant. Here, the humidity rho is prepared in advance in the ROM 52 as a map for the vehicle interior temperature.

Step 180: Maximize the amount of humidification by the humidifier 12. Specifically, the ultrasonic oscillator 13 is continuously oscillated to perform continuous humidification.

Step 190: Reduce the humidification amount, specifically the ultrasonic oscillator 13
Repeatedly start and stop every few seconds to reduce the amount of humidification as intermittent humidification.

Step 200: Stop humidification by the humidifier 12.

Step 100 to Step 2 for performing the above processing and judgment
This control routine composed of 00 is repeatedly executed together with other air conditioning control routines. Step 10
Each processing from 0 to step 120 constitutes the supercooling degree detection means together with the sensor group to obtain the supercooling degree T _S , and thereafter,
According to the judgment of 130, the process is branched to three processes, and then the necessity of humidification is judged in step 170 or step 175, and if the appropriate relative humidity is not reached, the humidification is carried out by the humidification amount according to the supercooling degree T _S. Then, go to NEXT and end this control routine.

Therefore, the amount of humidification by the humidifier 12 is controlled stepwise with the supercooling degrees of 0 ° C and 3 ° C as boundaries. It is also preferable to employ a technique such as phase (duty) control and control the humidification amount steplessly with respect to the supercooling degree T _S.

As described above, in the humidification amount control in steps 303 and 307, since the humidification amount is controlled according to the relative humidity RH and the supercooling degree T _S in the vehicle compartment, it is possible to prevent dew condensation on the equipment near the window glass in the vehicle compartment. .

Moreover, as can be seen from the control flow chart shown in FIG. 3, rest time, for example, by setting the nap time T _R, after humidified predetermined time T ₀ from the nap start (t = 0), the humidifier 12 is stopped, After that, the humidification is performed again for a certain period of time T ₀ before the end of the nap, so that the occupant does not hurt the throat, and the humidity in the passenger compartment does not rise extremely during the nap time.

In the control program shown in FIG. 3, the set time T ₀ is
Although it is stored in the ROM 52, the value of T ₀ which is being calculated in the CPU 50 may be determined according to the set time of the rest time T _R and stored in the RAM 54. In that case, the value of T ₀ may be changed at the beginning and the end of the rest time.

Further, in steps 305 and 309, the humidifier 12 is stopped, but the humidification amount may be automatically reduced as shown in step 190 of FIG.

In addition to the control program shown in FIG. 3, the control program shown in FIG. 5 or 6 may be used. FIG. 5 shows a modification of a part of the control program shown in FIG. 3, and when this is executed, the humidifier 12 operates for a certain time T ₀ from the start of the rest mode, then stops, and then Will not reactivate. Here, the time T ₀ can be appropriately changed by the operation of the occupant as shown in step 300, and is set in the RAM 54 through the input port 56.

In the control program shown in FIG. 6, step 400
As shown in, the rest end time is stored in the RAM 54 via the input port 56 by the setter provided in the vicinity of the operation switch 22, and in step 401, the CPU 50 is set to a program for receiving the output signal from the internal clock, Step
In 402, the time T _R until the end time is calculated. Next, it proceeds to step 403 and outputs a stop signal to the humidifier 12, and in step 404, it is determined whether or not the time at that time is equal to the time T ₀ hours before the end of rest, and the result is stored in the ROM 52. returns to step 403 if the time earlier than T ₀ hours is, if reached in time of rest before the end T ₀ hours, step 405
Then, the humidification amount is controlled according to the control program shown in FIG. After this, if the rest mode ends, steps 406, 40
7,408 ends the program.

[Brief description of drawings]

FIG. 1 is a basic configuration diagram of the present invention, FIG. 2 is a schematic configuration diagram showing a configuration of an embodiment of the present invention together with a block diagram of an electronic control circuit 30, and FIG. 3 is a control of the electronic control circuit 30 in the embodiment. The flowchart shown in FIG. 4 is a control flowchart showing the specific control of steps 303 and 307 of the flowchart shown in FIG. 3, and FIGS. 5 and 6 show the electronic control circuit 30 showing another embodiment of the present invention. It is a flowchart. 12 ... Humidifier (humidifying means), 22 ... Operation switch (operating means), 30 ... Electronic control circuit (capability control means).

Claims (1)

[Claims] 1. A humidifying means for humidifying a passenger compartment, an operating means for an occupant to manually set a rest time, and a rest time set by the operating means from the start of the rest time. For at least one of the predetermined time before the end of the rest time, the humidifying capacity of the humidifying means is a predetermined capacity, and the rest of the rest time is for humidifying the humidifying means. An air conditioner for a vehicle, comprising: a capacity control unit that controls the capacity of the humidifying unit so that the capacity is lower than the predetermined capacity.