JPH0332922A - Car air conditioner control device - Google Patents

Abstract

PURPOSE:To avoid the blasting of hot wind onto the face of unguarded passengers by forcibly switching blow-off ports to defroster sides when cabin temperature is high at the start of a car air conditioner, and switching the blow-off ports to vent sides after the lapse of a specified time. CONSTITUTION:Opening and closing of blow-off port control doors 20 of a car air conditioner are controlled by a control part 30 based on the outside air temperature detected by a sensor 40, indoor temperature detected by a sensor 50 and ON/OFF of a car air conditioner switch detected by a sensor 10. On such an occasion, if the indoor temperature is higher than 'outside temperature + set temperature' at the start of a car air conditioner 60, blow-off port control doors 20 are forcibly changed over to defroster sides. After a time set beforehand by a timer 35 has elapsed and the temperature of blown-off air is lowered, the blow-off control doors 20 are switched over to vent sides. This prevents hot wind from blasting onto the face of unguarded passengers.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a car air conditioner control device, and more particularly to a car air conditioner control device that can automatically switch the air outlet depending on the temperature inside the car when starting the car air conditioner.

[Conventional technology]

A conventional example is shown in FIGS. 4 and 5. The conventional example shown in FIG. 4 includes a car air conditioner 60 and a control section 30 for controlling the temperature of the air blown out from the car air conditioner 60 and the switching of the air outlets. The control unit 30 includes an air mix door 64 for adjusting the mixing ratio of cold air and hot air in the car air conditioner 60, a blow rod damper 74 for switching the air outlet from the car air conditioner 60 to the inside of the car, and a car air conditioner 60. A blown air temperature sensor 71 for measuring the temperature of air blown into the vehicle from the air conditioner 60 is connected.

As shown in FIG. 5, the car air conditioner 60 further includes a blower 62 for taking in air from inside and outside the car, an evaporator 63 for cooling the air from the blower 62, and a heat core for heating the air. 65, an air mix door 64 for controlling the proportion of air sent from the evaporator 63 to the heat core 65, a cold air blower lower 2 for blowing cold air into the car interior, and a hot air blower 2 for blowing hot air into the car interior. It is provided with a blowout rod 73, a blowout rod damper 74 for switching the blowout ports, and a blowoff air temperature sensor 71 for measuring the temperature of the blowout air.

Here, the cold air blower lower 2 faces toward the face, and the hot air blower lower 73 faces toward the feet.

At maximum cooling or maximum heating, the air mix door 64
The position of is "MAX C00L" or °'MA respectively.
X HEAT”.

The control unit 30 detects the position of the air mix door 64,
The air outlets are forcibly switched and controlled to the cold air blower lower 2 or the hot air blower 73, respectively, so that the cold air is blown out to the face and the warm air is blown out to the feet. In addition, during intermediate temperature control, depending on the temperature detected by the blown air temperature sensor 71, when the temperature is lower than a certain set temperature, the cold air is blown out from the lower air blower 2, and when the temperature is higher than a certain set temperature, it is blown out from the hot air blower 73. Blowout Rodanper 7
4 switching control is performed.

[Problem to be solved by the invention]

However, in the above-mentioned conventional example, even if the outside temperature is 35 ('C) or less, such as under the scorching summer sun, the inside temperature of a closed vehicle can reach 60 ('C) or more. In such cases, set the car air conditioner to max.
Even if it is set to ``C00L'', when the car air conditioner starts, cold air does not blow out immediately and hot air blows into the face.
This causes discomfort, and in order to avoid this, it is necessary to manually change the position of the louver and wait for the blown air to cool down.

[Purpose of the invention]

The purpose of the present invention is to improve the disadvantages of the conventional example, and to solve the problem of
To provide a car air conditioner control device which prevents hot air from blowing into the face when starting the car air conditioner.

[Means to solve the problem]

Therefore, the present invention provides an outside air temperature sensor for measuring the outside air temperature outside the car, an inside temperature sensor for measuring the temperature inside the car, and a car air conditioner switch sensor for knowing whether the car air conditioner is turned on. Equipped with: Additionally, an air outlet control door is installed inside the car air conditioner to switch the air outlet from the car air conditioner to either the vent side or the defroster side. When the car air conditioner starts, it compares the temperature signals from the outside temperature sensor and the inside temperature sensor, and if the inside temperature of the car is higher than the ``outside temperature + set temperature'', the air outlet is forced to defroster using the control door. The configuration includes a control section for switching the air outlet to the vent side after a preset time has elapsed. This aims to achieve the above-mentioned purpose.

[For production]

When the car air conditioner switch sensor detects that the car air conditioner is turned on, the control device inputs temperature signals from the outside air temperature sensor and the car interior temperature sensor. Even if the air outlet of the car air conditioner is set to the vent side, by forcibly switching the blowout control door from the vent side to the defroster side, hot air is blown out from the defroster toward the feet. After a preset time (for example, 10 seconds) has elapsed, the temperature of the blown air also decreases, the blowout control door switches to the preset vent side, and cold air is blown out from the vent toward the face.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

The embodiment shown in FIG. 1 includes a car air conditioner 60, an outside air temperature sensor 40 for measuring the outside air temperature outside the car, an inside temperature sensor 50 for measuring the temperature inside the car, and a car air conditioner 60 that is turned on. The car is equipped with a car air conditioner switch sensor 10 for knowing whether the air conditioner is on or not. An air outlet control door 20 for switching the air outlet from the car air conditioner 60 to either a vent side 68 or a defroster side 67 is provided inside the car air conditioner 60. When starting the car air conditioner 60, the temperature signals from the outside air temperature sensor 40 and the inside temperature sensor 50 are compared, and if the inside temperature of the car is higher than the "outside air temperature 10 set temperature", the control door 20 is forcibly blown to the defroster side 67. The configuration includes a control unit 30 for switching to the vent side and switching to the vent side again after a preset time has elapsed. Here, the magnitude of the set temperature is set in advance from the outside.

Furthermore, as shown in FIG. 2, the car air conditioner 60 includes an inside/outside air control door 61 for controlling the intake ratio of inside air and outside air, a blower 62 for forcibly taking inside and outside air, and a blower 62. An evaporator 63 for cooling the air, a heat core 65 for heating the air, an air mix door 64 for manually adjusting the ratio of air sent from the evaporator 63 to the heat core 65, and a defroster 67 for blowing air out. A defroster door 66 is used to manually set whether or not the air outlet is to be set to the defroster side 67 or the vent side 68; A heat vent door 69 is provided for setting on the side 70.

Next, the operation of this embodiment will be explained using the flowchart shown in FIG.

Generally, in the summer, the car air conditioner 60 sets the air outlet to the vent side 68, the inside/outside air control door 61 to the inside air mode, and the air mix door 64 to ``MAX''.

C00L''.

■ In the control unit 30, the car air conditioner switch sensor 10
It is checked whether the car air conditioner 60 is turned on (311 in FIG. 3), and if the car air conditioner is not turned on, monitoring is continued.

(3) When the car air conditioner 60 is turned on, the car interior temperature data from the car interior temperature sensor 50 is input (312 in FIG. 3).

(2) Input the outside air temperature data from the outside air temperature sensor 40 (313 in FIG. 3).

■If the temperature inside the car is "outside temperature + set temperature (e.g. 10"C)
) Check whether it is larger than J (3 in Figure 3).
14) If it is not large, vent side 68 of car air conditioner 60
Cool air is blown out from the machine (320 in Fig. 3).

■If the inside temperature of the car is set to ``the outside temperature data (e.g. 1
0° C.), the hot air outlet from the car air conditioner 60 is switched to the defroster side 67 using the outlet control door 20 to prevent hot air from blowing onto the face (315 in FIG. 3).

(2) Start the timer 35 to measure the blowing time (316 in FIG. 3).

■, Hot air is blown into the car from the defroster side 67 (3rd
5LY in the figure).

■Check the timer 35 (517 in Figure 3)
When a preset time (for example, 10 seconds) has elapsed, it is determined that the temperature of the blown air has decreased, and the air outlet is switched to the vent side 68 by the blown Roland roll door 20 (319 in FIG. 3).

■Blows cold air into the car from the vent side 68.

(320 in Figure 3).

Note that the set temperature and set time are not limited to those in this embodiment, and can be changed depending on the situation.

〔Effect of the invention〕

As described above, according to the present invention, when the temperature inside the car is high, such as under the scorching summer sun, hot air is prevented from being blown towards the face from the vent when the car air conditioner is started, and the air is cooled and then blown towards the face. be able to. As a result, there is no discomfort when starting the car air conditioner, and there is no need for complicated operations such as manually switching the air outlet each time the car air conditioner is started, and it is possible to immediately return to a comfortable driving state. We can provide an excellent car air conditioning control device that is not available anywhere else.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of the present invention, FIG. 2 is a configuration diagram of the air conditioner of this embodiment, FIG. 3 is a flowchart showing the operation of this embodiment, and FIG. 4 is a schematic diagram showing a conventional example. FIG. 5 is a block diagram of a conventional air conditioner. 10... Car air conditioner switch sensor, 20...
Blowout control door, 30...control unit, 40
...Outside temperature sensor, 50...Inside temperature sensor

Claims (1)

[Claims] (1) An outside temperature sensor for measuring the temperature outside the car, an inside temperature sensor for measuring the temperature inside the car,
and a car air conditioner switch sensor for determining whether the car air conditioner is turned on, and an air outlet control door for switching the air outlet from the car air conditioner into the vehicle interior to either the vent side or the defroster side. is installed in the car air conditioner, and when the car air conditioner is started, the temperature signals from the outside temperature sensor and the inside temperature sensor are compared, and if the inside temperature is higher than the outside air temperature + set temperature, the air outlet is forcibly controlled. This car air conditioner control device is characterized by being equipped with a control means that switches the air outlet to the defroster side by a door and also switches the air outlet to the vent side after a preset time has elapsed and the temperature of the blown air has decreased.