JPS6258930B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automatically controlled air conditioner, and more particularly to an improvement in the starting mode of an air conditioner for an automobile.

(Prior Art) In winter, when there is no sunlight and the temperature of the upper part of the vehicle interior is lower than the target room temperature, the air conditioner is normally started in a heat mode that blows air from the defroster side and the floor side.

However, in this case, for example, if the heat model is started immediately after turning on the ignition switch, cold air will blow out to the floor side, that is, to the feet, making the occupants uncomfortable.

For this reason, in the past, the blower fan that blows out air was not started until the temperature of the engine cooling water rose to a certain level after the air conditioner was started.

(Problem to be Solved by the Invention) However, when using the above-mentioned control, in a cold environment such as winter, it is necessary to wait for the water temperature to rise after starting the engine and turning on the air conditioner. In addition, I had to wait until, for example, the windshield was defogged after I started operating in heat mode.

(Means for Solving the Problems) The present invention has been made in an attempt to eliminate the above-mentioned drawbacks of the prior art, and has a starting mode that allows the vehicle to be brought into operation quickly without wasting standby time. The purpose is to provide an automatically controlled air conditioner.

To achieve this objective, according to the invention:
A detection means that detects a physical environmental factor related to temperature and outputs it as an electric signal, a setting means that sends out an electric signal according to a setting operation by a passenger to set the temperature inside the vehicle, and an operation element related to temperature. A drive device that drives the vehicle, and a calculation is performed to create an optimal environment in the vehicle based on signals indicating the output signals of the detection means and the vehicle interior setting means, and a command signal is sent to the drive device based on the result of this calculation. In the automatic control air conditioner, the detection means includes a water temperature sensor that detects the temperature of the engine cooling water, a foot outlet temperature sensor that detects the temperature of the outlet to the footwell, and a temperature sensor that detects the temperature of the upper part of the passenger compartment. The drive device has at least an upper room temperature sensor that selects an air outlet and a motor control circuit that drives a blower motor that controls a blowout mode actuator that drives a door that selects an air outlet and a blower motor that controls a blowout air volume. When the control device determines to execute startup in heat mode based on the upper room temperature signal output from the upper room temperature sensor, while the water temperature is determined to be low based on the water temperature signal output from the water temperature sensor. The mode actuator sets the defroster mode, and the motor control circuit sends out a command signal to operate the blower motor at a very low speed, and the water temperature is adjusted according to the water temperature signal output from the water temperature sensor. When it is determined that the temperature has risen to a certain level, the blowout mode actuator sets the heat mode and sends out a command signal so that the motor circuit rotates at a low speed. When it is determined based on the signal that the temperature at the foot has risen to a certain level, a command signal is sent so that the motor control circuit operates according to the basic control mode.

(Function) With the above configuration, according to the present invention, when the engine is started and the air conditioner is activated, in a cold environment such as winter, the room temperature in the upper part of the passenger compartment is first lowered. If it is determined that the coolant temperature is low and the heat mode is selected, the cooling water temperature is then compared to see if it is lower than a predetermined temperature. If it is determined to be lower, the defroster mode is selected and the blower motor rotates at an extremely low speed. is rotated. This defroster mode is executed until the water temperature rises.

Therefore, fogging on the windshield can be removed before the temperature of the cooling water rises to a temperature at which the vehicle can run. Furthermore, since the blower motor rotates at a low speed at this time, there is no problem such as cold air (while the water temperature is low) hitting the occupant's face.

When the water temperature reaches a predetermined temperature or higher after the above-described defroster mode is executed, the mode is switched to the heat mode, and the rotation speed of the blower motor is also switched from very low speed rotation to low speed rotation. This mode is executed until the foot outlet temperature rises to a predetermined temperature, and then it is operated according to the normal basic control mode.

Therefore, when the water temperature rises and the system switches to heat mode, the windshield must have been cleared of fog, and the system can be put into operation immediately.

(Embodiments of the invention) Examples of the invention will be described below with reference to the accompanying drawings.

FIG. 1 is a system diagram showing an embodiment of the present invention.

According to the figure, system chamber 1 for internal and external air
0, a drive device 20, a portion 30 including a detection means, a setting means, etc., and an arithmetic and control device 40.

The system chamber 10 includes an outside air introduction duct 1
1, inside air introduction duct 12, inside/outside air switching door 13,
Blower fan 14, evaporator 15, heater core 16, air mix door 17A, 17B, 17
C, and floor door 18A, defroster door 18
B, and a ventilator door 18C, and by opening and closing each door 18A to 18C, control is executed to select the blowing mode to vent mode, bilevel mode, or heat mode, and the air mix door 17A to 17C is Ventilator outlet B by adjusting the opening degree respectively.
The air temperature of the upper and lower two layers on the defroster outlet C side and the foot outlet A side is adjusted respectively.

The outside air introduction duct 11 is a duct for introducing air outside the vehicle interior, and the inside air introduction duct 12 is a duct for reintroducing air inside the vehicle interior. Select whether to take in air from 12.

The blower fan 14 blows out air introduced from the ducts 11 and 12 toward the interior of the vehicle. An evaporator 15 is provided immediately after the blower fan 14, and forms cold air by introducing a refrigerant.

The heater core 16 forms warm air and mixes this warm air with the cold air from the evaporator 15, and the mixing ratio is adjusted by the opening degree of the air mix doors 17A to 17C.

In this way, optimal air is sent into the vehicle interior depending on the outside air direction of the inside/outside air switching door 13, the rotational speed of the blower fan 14, and the opening degree of the air mix doors 17A to 17C.

Normally, such air is blown out from the floor outlet A with the floor door 18A and the bench outlet B with the ventilator door 18B during the summer and intermediate seasons.
(B/L mode), and in winter, use the floor outlet A and the defroster outlet C with the defroster door 18C (heater mode).

In addition, each element 13, 14, 17A to 17C, 18
A to 18C are operated by a passenger or automatically, and are referred to as "operating elements" in this specification as necessary.

The drive device 20 is for driving the temperature-related operating elements 13, 14, 17A to 17C, and 18A to 18C, and includes an internal/external switching actuator 21, a motor control circuit 22, an opening adjustment actuator 23, and an air blower. Mode actuator 2
It has 4. Inside/outside air switching actuator 21
drives the inside/outside air switching door 13 in a predetermined switching direction using the command signal CC1. Motor control circuit 22
determines the rotation speed of the blower fan 14 based on the command signal CC2. Opening adjustment actuator 23
determines the opening degrees of the air mix doors 17A to 17C based on the command signal CC3. The blowout mode actuator 24 is connected to the doors 18A to 1 by CC4.
Open and close 8C and select any two air outlets as described above.

The portion 30 includes a detection means for detecting a physical environmental factor related to temperature and outputting it as an electrical signal, and a detecting means for detecting a physical environmental factor related to temperature and outputting the electrical signal according to a setting operation by a passenger to set a physical environmental factor in the vehicle interior related to temperature. and other means.

The detection means includes an outside air temperature sensor 31 that detects the temperature outside the vehicle interior, a room temperature sensor 32 that detects the temperature inside the vehicle interior, an air outlet temperature sensor 33 that detects the air outlet temperature from each outlet, and a solar radiation sensor that detects the amount of solar radiation. 3
4, and a water temperature sensor 35 for detecting the temperature of engine cooling water.

As a setting means, a temperature setting switch 36 is provided for setting a desired cabin temperature.

Other means are an AD converter 38 and a temperature display device 39. The AD converter 38 converts the output signals SS1 to SS5 of each detection means into digital signals for post-processing. The temperature display device 39 displays the temperature set by the temperature setting switch 36, and various methods such as segment display using fluorescent tubes, LEDs, liquid crystals, etc. are possible.

In addition, each sensor 31 to 35 has a detection signal, respectively.
SS1 to SS5 are sent out, and the temperature setting switch 36 sends out a set temperature signal CS.

In this specification, physical environmental factors related to temperature include not only temperature, but also humidity, solar radiation, etc., and also include factors that affect the temperature inside the vehicle, such as vehicle speed, as necessary. It includes.

The arithmetic and control device 40 sends control command signals CC1 to CC4 based on signals SS1 to SS5 and CS from each detection means and setting means, etc., to create an optimal environment in the vehicle interior.

The configuration of the parts of this arithmetic and control unit 40 that are mainly related to the present invention is shown in FIG. In this figure, the same reference numerals as in FIG. 1 indicate the same symmetry.

According to the figure, the arithmetic and control device 40 includes an upper target room temperature calculation circuit 41A, a lower target room temperature calculation circuit 41A, and a lower target room temperature calculation circuit 41A.
B, an upper temperature difference calculation circuit 42A, a lower temperature difference calculation circuit 42B, a blowout air volume calculation circuit 43, a blowout mode selection circuit 44, and a basic control mode system 45.

Also, according to the figure, the room temperature sensor 32 in FIG. 1 is divided into an upper room temperature sensor 32A and a lower room temperature sensor 32B, and of the outlet temperature sensors 33, the foot outlet temperature sensor 33B is shown.

The upper target room temperature calculation circuit 41A and the lower target room temperature calculation circuit 41B respectively receive an outside temperature signal SS1, a solar radiation signal SS4, and a set temperature signal CS, which are the output signals of the outside temperature sensor 31, the solar radiation sensor 34, and the temperature setting switch 36. Calculate independently. The output signals indicating the target temperature are S1A and S1B, respectively.

The upper temperature difference calculation circuit 42A and the lower temperature difference calculation circuit 42B receive the output signals S1A and S1B of the calculation circuits 41A and 41B, respectively, and the upper room temperature sensor 32A.
The difference between the output upper room temperature signal SS2A of the lower room temperature sensor 32B and the output lower room temperature signal SS2B of the lower room temperature sensor 32B is calculated to form small difference signals ΔSA and ΔSB, respectively.

The blowout air volume calculation circuit 43 calculates the blowout air volume based on the output signal ΔSA of the upper temperature difference calculation circuit 42A, and generally performs control such that the blowout air volume decreases as the cabin temperature approaches the target temperature. A command signal CC2 is sent to the motor control circuit 22. However, in this case, the opening adjustment actuator 23 controls the air mix doors 17A to 17C in response to the command signal CC3 from the arithmetic and control device 40, so that the blowing temperature is controlled so as not to drop significantly from the starting temperature.

Further, this circuit 43 is interrupted by the output signals SS5 and SS3B of the water temperature sensor 35 and the foot airflow sensor 33B, respectively, to reduce the airflow volume or restore the original airflow volume.

The blowout mode selection circuit 44 uses a signal ΔSA to generate a control command signal for selecting a blowout mode such as defroster mode DEF, bilevel mode B/L, ventilator mode VENT, heat mode HEAT, etc.
CC4 is sent to the blow mode actuator 21. However, the signal SS5 from the water temperature sensor 35 causes switching from the heat mode to the defroster mode.

That is, when the heat mode is selected by the signal ΔSA and the water temperature is below a certain value Two (for example, 41° C.) by the water temperature sensor 35, an interrupt is made to the blow mode selection circuit 44 to select the defroster mode.

Next, an embodiment of the present invention will be described with reference to FIGS. 3 and 4. In addition, in the following explanation, (1), (2),
The symbols such as (3) correspond to the symbols in the flowchart of FIG.

Desired cabin temperature after starting the air conditioner (1)
Ts is set (2) by the temperature setting switch 36, and the outside temperature Ta and solar radiation Zc are set by each sensor 31,
34 (3) and the target room temperature for each of the upper and lower parts is calculated by the calculation circuits 41A and 41B (4).

At the same time, the upper and lower room temperatures are read by the sensors 32A and 32B (5), and the arithmetic circuits 42A and 42
Upper temperature difference ΔTu (corresponds to signal ΔSA) by B
and lower temperature difference ΔTL (corresponding to signal ΔSB) (6).

At this time, if the upper temperature difference ΔTu is greater than or equal to the constant value K1, it is determined that the heat mode should be used (7) and the water temperature Tw is read (8).

Next, the read water temperature Tw is set to a constant value Two (e.g.
40℃) or higher (9),
If Tw≦Two, the motor voltage VM that makes the motor rotation speed low is set to LLo (Figure 4) and the defroster mode is set to DEF (10) Circuits 43 and 44
The motor control circuit 22 and mode actuator 21 are driven accordingly.

In addition, if Tw > Two, read the foot outlet temperature TdL (11) and set the reference value with this temperature TdL.
It is determined whether TdL>TdLo (12), and if TdL>TdLo, the controller shifts to basic control mode (13) and performs normal control (FIG. 4).

If TdL≦TdLo, the motor voltage VM that makes the motor rotation speed low is set to Lo and the heat mode HEAT is set (14), and the control is repeated (FIG. 4).

If ΔTu+Ki≦0 for the upper temperature difference ΔTu, check whether the lower room temperature is higher than the lower target room temperature, that is, the member ΔTL of the lower temperature difference ΔTL>0
to judge (15). If the lower room temperature, where ΔTL≦0, is higher than the lower target room temperature, the basic control mode is set (16), and when the lower room temperature, where ΔTL>0, is lower than the lower target room temperature, it is determined that Tw>Two for the water temperature (17). ). If Tw≦Two, the motor voltage VM to make the motor rotation speed low is set to Lo and the control is repeated as the ventilator mode VENT, and Tw>
If it is Two, it shifts to basic control mode.

Figure 4 shows the progress of the above points,
The motor voltage VM when the motor rotation speed is very low is
LLo, and the water temperature Tw increases with time T.
If it exceeds Two, there is a mode conversion from defroster mode DEF to heat mode HEAT, and the motor voltage VM is Lo when the motor rotation speed is low.
This shows that when the blowout temperature TdL further increases and exceeds TdLo, normal basic control is activated while maintaining the heater mode.

This invention is not limited to the above-described embodiments, but includes various modifications within the scope that can achieve the object of the invention.

(Effects of the Invention) With the above configuration, according to the present invention, it is possible to provide an automatically controlled air conditioner that has the following effects.

By setting the defroster mode to blow only from the defroster side at startup, and by setting the blower motor to a low rotation speed, it is possible to remove fog from the windshield before the water temperature rises.

In the above case, since the blower motor rotates at a low speed, there is no problem such as cold air hitting the occupant's face.

When the water temperature rises and the vehicle enters heat mode, the fog on the windshield should have been cleared and the vehicle can be put into operation immediately.

In each of the above cases, the outlet temperature and outlet air volume are controlled independently, and a basic control mode is set in which the outlet temperature does not change significantly even if the room temperature approaches the target temperature from the time the air conditioner is started and the outlet air volume decreases. In this case, the effect of ~ is particularly significant.

[Brief explanation of the drawing]

Figure 1 is a system diagram showing an embodiment of this invention, Figure 2 is a system diagram showing an embodiment of the present invention.
FIG. 3 is a flowchart showing the operation of the embodiment of the present invention, and FIG. 4 is an explanatory diagram showing the operation of the embodiment of the present invention. DESCRIPTION OF SYMBOLS 10... System chamber, 20... Drive device, 31-35... Detection means, 36... Temperature setting switch, 40... Arithmetic control unit.

Claims (1)

[Scope of Claims] 1. Detection means for detecting physical environmental factors related to temperature and outputting them as electrical signals; and setting means for transmitting electrical signals in accordance with setting operations by a passenger to set the temperature inside the vehicle interior. , a drive device that drives temperature-related operating elements, and a calculation is performed to create an optimal environment in the vehicle interior based on signals indicating the output signals of the detection means and the setting means, and the drive device is operated based on the calculation result. In an automatic control air conditioner equipped with an arithmetic and control device that sends command signals to the device, the detection means includes a water temperature sensor that detects the temperature of engine cooling water, a foot outlet temperature sensor that detects the temperature of the outlet to the foot, and a vehicle air conditioner. The driving device has at least an upper room temperature sensor that detects the temperature of the upper part of the room, and the driving device has a reduced number of motor control circuits that drive a blower motor that controls a blower motor that controls a blowout air volume and a blowout mode actuator that drives a door that selects an air blowout outlet. When the arithmetic and control unit determines to execute startup in the heat mode based on the upper room temperature signal output from the upper room temperature sensor, it determines that the water temperature is low based on the water temperature signal output from the water temperature sensor. During the determination, the blow mode actuator sets the defroster mode, and the motor control circuit sends out a command signal to operate the blower motor at a very low speed, and the water temperature output from the water temperature sensor is controlled. When it is determined that the water temperature has risen to a certain level based on the signal, the blowout mode actuator sends out a command signal so as to set the heat mode and the motor circuit to rotate at a low speed. The motor control circuit is characterized in that when it is determined that the outlet temperature at the foot has risen to a certain level based on the outlet temperature signal output by the temperature sensor, a command signal is sent out so that the motor control circuit operates according to the basic control mode. Automatically controlled air conditioning system. 2. In the device according to item 1, the arithmetic and control unit sends a command signal to the drive unit so that the air outlet temperature does not drop significantly from the starting temperature even when the cabin temperature approaches the target temperature and the air outlet volume decreases. An automatically controlled air conditioner characterized by sending out air.