JPS61178218A - Air conditioner for automobile - Google Patents

Abstract

PURPOSE:To make space inside a car room so as to be kept in optimum humidity, by making a humidifying quantity as much as the specified time from some time but making it smaller for the rest time by a capacity control device while a rest mode is being set. CONSTITUTION:A humidifier 12, installing an ultrasonic oscillator 13 inside a water tank 14, is ajoiningly installed in a blast duct 1. And, an operating switch 22 setting a rest mode is installed in a car driving operation part. In addition, there is provided with an electronic control circuit 30 or a capacity control device controlling a humidifying quantity in the humidifier 12. And, the electronic control circuit 30 is made up of installing an input port 56, making each signal out of a room temperature sensor 16, a temperature sensor 18, an operating switch 22 and a glass temperature sensor 24 into analog-to-digital conversion and inputting them, an output port 58 outputting a signal driving an ultrasonic vibrator 13, etc., in addition to a central processing unit 50, a read-only memory 52 and a random access memory 54, etc., widely known. With this constitution, in time of such a rest as taking a nap, space inside a car room is made so as to keep up optimum humidity.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a car air conditioner control device that automatically controls humidity.

(Prior Art) Conventionally, in an automobile, a humidifying means is installed either integrally with an air conditioner unit combined with a temperature regulating means or independently thereof, thereby increasing the humidity of the air inside the vehicle. It has been known. These devices are
Particularly when operating the heater in cold weather, this has the advantage of preventing the occupant from feeling the discomfort of being thirsty and preventing the mucous membranes of the throat from drying out.

However, when operating the humidifying means, it is not preferable to make the vehicle interior more humid than necessary, and it is even more undesirable for the window glass to fog up during driving.

Therefore, Tokukai Showa 5E! -122217 Publication (B60H
3100), a car air conditioner control device equipped with a humidifier is provided with a mode selector, detects the humidity inside the vehicle and the degree of fogging of the window glass, and the control device detects the fogging of the window glass in the driving mode. The operation of the humidifier is adjusted so that the humidity in the vehicle interior reaches the desired level under no restrictions, and in the rest mode, the operation of the humidifier is adjusted so that the humidity in the vehicle interior reaches the desired level by substantially canceling the above restrictions. It is known to regulate actuation.

(Problem to be Solved by the Invention) According to the above publication, in the rest mode, the humidifier is operated only according to the relative humidity, regardless of whether the windows are fogged, so Because the humidity in the air increases, some passengers may feel uncomfortable. Also,
When the occupant takes a nap during the rest mode, there is no need to increase the humidity in the vehicle interior during the nap because the occupant's metabolism decreases during the nap.

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

(Means for Solving the Problems) Therefore, as shown in FIG. 1, the present invention includes: a humidifying means; an operation means for setting a rest mode; A technical means is adopted in which the humidifying device is provided with a capacity control means for varying the capacity of the humidifying means according to an arbitrary time or time.

(Function) By adopting the above technical means, the above humidifying means can:
While the rest mode is set, the capacity control means automatically increases the amount of humidification for a predetermined period of time starting from a certain time, and automatically decreases or stops the amount of humidification for the remaining time.

(Effects of the Invention) Therefore, according to the present invention, it is possible to maintain the vehicle interior space at an optimal humidity during rest such as napping.

Furthermore, since the amount of water consumed in the rest mode is lower than in the past, the capacity of the water tank of the humidifying means can be reduced, and the humidifying means can be downsized.

Further, by reducing the capacity of the humidifying means in the rest mode, it is possible to reduce energy consumption for operating the humidifying means.

(Example) Embodiments of the present invention will be described in detail below based on the drawings.

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

In Figure 2, 1 is a ventilation duct, 2 is a floor for ventilation, 4 is an evaporator for cooling and dehumidification, 6 is a heater core, 8 is an air mix damper for air mixing, 10 is a damper for switching inside and outside air, 12 1 is a humidifier equipped with an ultrasonic oscillator 13 in a water tank 14 as a humidifying means, 15 is a blow-off duct for each purpose that blows out air after conditioning into the vehicle interior, and 16 is an indoor temperature sensor that detects the temperature Tin inside the vehicle interior. , 18 is a semiconductor type humidity sensor that detects the relative temperature in the vehicle interior, 20 is a rear glass, 22 is an operation switch that sets the body breath mode, 24 is a glass temperature sensor that mainly detects the inner surface temperature Tg of the rear glass 20, Reference numeral 30 denotes an electronic control circuit which is a capacity control means for controlling the amount of applied power.

The electronic control circuit 30 includes a well-known CPU 50, ROM 52,
RAM54 etc., indoor temperature sensor 16, temperature sensor 18,
The signal from the operation switch 22 and the glass temperature sensor 24 is
/D conversion input port 56, ultrasonic transducer 1
It is equipped with an output boat 58 etc. that outputs a signal to drive 3,
Each element and each boat are interconnected by a bus 59.

This electronic control circuit 30 incorporates a control program shown in FIGS. 3 and 4.

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

In FIG. 3, when the operation switch 22 is set to the nap mode and the nap time TR is set to an appropriate time, TR is read in step 301, and step 302
Then, the initial value 1=0 is set in the RAM 54, and the CPU begins to receive an input signal from the built-in timer counter. Therefore, the process proceeds to step 303, and the amount of humidification is controlled by the control programmer J shown in FIG. Next, when the process proceeds to step 304, the CPU determines the magnitude relationship between the time t at that time and the set time T0 stored in the ROM 52, and if To>t, the process returns to step 303 and T. ≦t
If so, the process advances to step 305 and the humidifier 12 is stopped. At this time, the interior air switching damper 10 may be configured to be placed in the interior air mode by a signal from the exit boat. Next, in step 306, the current time (TRt) and the set time T are determined. When To>TR-t, the process returns to step 305, and when To≦TR-t,
Proceeding to step 307, the amount of humidification is controlled by the control program shown in FIG. After that, in step 308, the time t at that time is compared with the set time TR, and TR>
When t, the process returns to step 307, and if T,≦t, the process proceeds to step 309 to stop the humidifier, and step 310
Terminate the program.

Next, the control program shown in FIG. 4 will be explained. Each step in this flowchart performs the following judgments, processing, etc.

Step 100: The vehicle interior temperature Tin detected by the interior temperature sensor 16, the relative temperature RH in 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 to the input board. 56.

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

Step 120: Subtract the glass temperature Tg from the fog point temperature Td to calculate the degree of supercooling Ts.

Step 130: Determine the degree of supercooling T, and if T<0℃, proceed to step 140, if θ℃≦T, <3℃, proceed to step 150, and if 3℃<T, proceed to step 160, respectively. Make a decision to move.

Steps 170 and 175n It is determined whether the relative speed RH in the vehicle interior is less than or equal to the appropriate relative humidity rho at the temperature in the vehicle interior selected by the occupant (if parallel is reached, it is equal to Tin). Here, the humidity rho is stored in the ROM52 in advance.
A map is prepared for the vehicle interior temperature.

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

Step 190: Reduce the amount of humidification, specifically, repeat activation and deactivation of the ultrasonic oscillator 13 every few seconds to reduce the amount of humidification as intermittent humidification.

Step 200: Stop humidification by the humidifier 12.

This control routine consisting of steps 100 to 200 for performing the above processing and judgment is repeatedly executed together with other air conditioning control routines. Each process from step 100 to step 120 constitutes a degree of supercooling detecting means together with a sensor group to determine the degree of supercooling T, and then branches into three processes based on the judgment in step 130, and then steps 170 or 175 It is determined whether humidification is necessary, and if the appropriate relative humidity has not been reached, humidification is performed with an amount of humidification corresponding to the degree of supercooling Ts, and the control routine exits to NEXT to end this control routine.

Therefore, the amount of humidification by the humidifier 12 is at a supercooling level of 0°C.

It is controlled in stages with a boundary of 3°C. In addition, by adopting methods such as phase (duty) control, the amount of humidification is controlled by the degree of supercooling T,
It is also preferable to control steplessly.

As mentioned above, in the humidification amount control in steps 303 and 307, the humidification amount is controlled according to the relative humidity RH in the vehicle interior and the degree of supercooling Ts, so that dew condensation on equipment near the window glass in the vehicle interior is prevented. can.

Also, as shown in the control flowchart shown in FIG. 3, if the rest time, for example, the nap time 'ra+, is set,
A certain period of time T from the start of the nap (1=0).

After humidifying for a certain amount of time, the humidifier 12 is stopped, and then the temperature is increased for a certain period of time T before the end of the nap. Since the humidification is performed once again, the occupants do not get sore throats, and the temperature inside the vehicle does not rise excessively during the nap time.

In addition, in the control program shown in FIG. 3, the set time T.

is stored in the ROM 52, and calculations are performed within the CP tJ 50 according to the set time of the rest time TR. It is also possible to decide a value and store it in the RAM 54. Further, in that case, the value of To may be changed at the beginning and end of the rest period.

Furthermore, in steps 2 and 305 and 309, the humidifier 12 is stopped, but the amount of humidification may be automatically reduced as shown in step 190 in FIG.

In addition to the control program shown in FIG. 3, a control program shown in FIG. 5 or 6 may be used. The program shown in FIG. 5 is a partial modification of the control program shown in FIG. 3. When this program is executed, the humidifier 12 is operated for a certain period of time T from the start of the rest mode. It is set to □ to prevent it from operating again. Here, time T. can be changed as appropriate by the operation of the passenger as shown in step 300, and the RAM is inputted through the input port 56.
It is set to 54.

In addition, in the control program shown in the sixth part, step 40
0, the rest end time is set in the RAM via the input port 56 by a setting device provided near the operation switch 22.
In step 401, the CPU 50 sets a program that accepts an output signal from the internal clock, and in step 402, calculates the time T until the end time. Next, the process proceeds to step 403, where a stop signal is output to the humidifier 12, and in step 404, the time at that time is T from before the end of rest. T, which is stored in the ROM 52, is determined to determine whether the time is equal to the previous time. If the time is before the end of the rest period, the process returns to step 403 and returns to T before the end of the rest. When the specified time is reached, the process proceeds to step 405, and the humidification amount is controlled according to the control program shown in FIG. After this, if the rest mode ends, steps 4.06 and 407
, 408, the program ends for one winter.

[Brief explanation of the drawing]

FIG. 1 is a basic configuration diagram of the present invention, FIG. 2 is a schematic configuration diagram showing the configuration of an embodiment of the present invention together with a block diagram of the electronic control circuit 30, and FIG. 3 is a diagram showing the control of the electronic control circuit 30 in the embodiment. Flowchart showing. Figure 1 shows step 3 of the flowchart shown in Figure 3.
03.307, and FIGS. 5 and 6 are flowcharts of the electronic control circuit 30 showing other embodiments of the present invention. 12... Humidifier (humidifying means), 22... Operation switch (operating means), 30... Electronic control circuit (capacity control means).

Claims (1)

[Scope of Claims] Humidifying means; Operating means for setting a rest mode; When the rest mode is set, the ability of the humidifying means is varied according to an arbitrary time or period during the rest mode. An air conditioner for an automobile, comprising: capacity control means.