JPH0127449Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an automatically controlled air conditioning system for a vehicle.

(Prior Art) Conventionally, as an example of an automatic control air conditioner that detects the temperature inside and outside the vehicle cabin and automatically controls the temperature to obtain a set temperature based on the detected temperature, the one shown in FIG. 8 is known. It is being

This conventional automatically controlled air conditioner has an inside/outside air intake duct 103 on one side of a system chamber 100 that communicates with an outside air intake 101 and an inside air intake 102.
A defroster outlet 104 and a ventilator outlet 10 as a head side outlet are provided on the other side.
5 is provided, a floor air outlet 106 as a foot side air outlet is provided, and the air flow path 1
07 is provided with a blower 108, an evaporator 109, and a heat core 110, and the temperature of the air blown out from the blow-off ports 104, 105, and 106 is adjusted by adjusting the amount of air flowing through the heat core 110. Air mix doors 111, 112, 113 are provided, and
An inside/outside air switching door 114, a vent door 115,
A differential door 116 and a floor door 117 were provided.

The inside/outside air switching door 114 is switched by a switching actuator 118, and the vent door 115, the differential door 116, and the floor door 11
7 is switched by a switching actuator 119, and the air mix doors 111, 112, 11
3 has its opening adjusted by an opening adjustment actuator 120, which inputs a vehicle room temperature signal 122 from a vehicle room temperature sensor 121 and outputs an opening adjustment signal 123 to a temperature control means 124. It was something that was driven.

Therefore, the temperature of the air cooled by the evaporator 109 is adjusted appropriately through the heat core 110 by adjusting the opening degrees of the air mix doors 111, 112, and 113, and the air is cooled by the air outlet ports 104, 105, and 106.
It is possible to blow out more water.

Furthermore, the vent door 115 can be switched to select either the defroster outlet 104 or the ventilator outlet 105, and the floor door 117 can be opened or closed to make the floor outlet 106 either open or closed. did it.

(Problem that the invention aims to solve) By the way, when air conditioning the inside of a vehicle, the most comfortable condition for tower passengers is when their heads are cold and their feet are warm, whereas the naturally warm air is In addition to the fact that the upper part of the vehicle interior is also easily heated by sunlight, the upper part tends to be warm and the lower part to be cold, contrary to the cold head and feet.

However, the comparison of the amount of air blown out from the head side outlet and the foot side outlet of this conventional automatic control air conditioner is determined by the cross-sectional area of the outlet and the duct, and is always constant or Since air can only be blown from only the air outlet, if air is blown from both air outlets during cooling, the foot side often gets cold quickly and even if the desired temperature is reached, the head side often does not cool down easily. When air is blown only from the outlet, only the head side is cooled, and when heating, there is a problem in that even though the head side warms up quickly, the foot side does not warm up easily.

(Means for Solving the Problems) Therefore, in order to solve the above-mentioned problems, the present invention provides an automatic control air conditioner that connects the internal and external air intake ducts to the head side air outlet and foot side air outlet. A system chamber having an air flow path and a blower; an air volume adjustment door provided in the system chamber for adjusting the volume of air blown from the head side outlet and the foot side outlet; an air volume adjustment actuator that changes the opening degree; an opening sensor that detects the opening degree of the air volume adjustment door and outputs an air volume adjustment door opening degree signal; and a temperature setting device that outputs a set temperature signal in accordance with a setting operation by an occupant. and a head sensor that outputs the temperature of the upper part of the vehicle interior as a head temperature signal.
A foot sensor that outputs the temperature of the lower part of the vehicle interior as a foot temperature signal, and an air volume adjustment device that inputs the air volume adjustment door opening signal, set temperature signal, head temperature signal, and foot temperature signal to drive the air volume adjustment actuator. an air volume control means for outputting an actuator drive signal and a blower drive signal for driving the blower, and the air volume control means outputs a head target temperature signal and a higher temperature based on the set temperature signal. A foot target temperature signal is determined, both target temperature signals are compared with both temperature signals, and an air volume adjustment actuator drive signal is output so that the air volume from the air outlet on the side where the difference is larger is increased. Sometimes, when the difference between the target temperature and the actual temperature on the head side is larger than the difference between the target temperature and the actual temperature on the foot side by a predetermined value or more, a blower drive signal is output that increases the rotation speed of the blower. The method was structured as follows.

(Function) Therefore, in the automatic control air conditioner of the present invention, the head temperature target signal and the foot temperature higher than that are set to create a vehicle interior environment with a cold head and warm feet based on the set temperature signal. The target temperature signal is compared with the head temperature signal and the foot temperature signal, which indicate the actual temperature obtained from the head sensor and the foot sensor, respectively, and the difference between the target temperature and the actual temperature between the head side and the foot side is determined. Blow out more temperature-controlled air to the side with the larger side.

As a result, the temperature difference is reduced more quickly than when the blowout amount is constant.

Furthermore, during cooling, if the difference between the target temperature and the actual temperature on the head side is larger than the difference between the target temperature and the actual temperature on the feet side by more than a predetermined value, even if the average indoor temperature is Even if the temperature is close to that of the vehicle, the rotation speed of the blower is increased to provide a cooling sensation to the occupant, and the temperature on the head side can be quickly brought close to the target temperature.

(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, the structure of the first embodiment shown in FIGS. 1 to 5 will be explained.

Reference numeral 1 denotes a system chamber, which has an air flow path 6 leading from an internal/external air intake duct 2 to a ventilator outlet 3 as a head side outlet, a defroster outlet 4 as a head side outlet, and a floor outlet 5 as a foot side outlet. The system chamber 1 also has a blower 7, and an evaporator 8 and a heat core 9 are provided in the air passage 6 of the system chamber 1.

Note that 10 is an inside air intake port, and 11 is an outside air intake port.

12 is an inside/outside air switching door, with both inlets 1
It is used to switch between intake of air from 0 and 11, and is switched by a switching actuator 14 whose drive is controlled by a control means 13.

15 is a vent door that switches the airflow from the system chamber 1 to the head side;
The switching is performed by a switching actuator 16 whose drive is controlled by a control means 13.

Reference numerals 17, 18, and 19 are air mix doors, and by adjusting the opening degree, the amount of air flowing from the evaporator 8 side that passes through the heat core 9 is adjusted, thereby controlling the amount of air blown out from the air outlets 3, 4, and 5. The temperature is adjusted, and the opening degree is adjusted by a mix door actuator 20 whose drive is controlled by the control means 13.

Reference numeral 21 denotes a defroster door, which is closed when air is blown out from the defroster outlet 4.

Reference numeral 22 denotes an air volume adjustment door, which is pivotally attached to the floor air outlet 5.
By changing the opening degree of 2, the air volume from the floor air outlet 5 can be increased or decreased, and by increasing or decreasing the air volume from the floor air outlet 5, the air volume blown out from the ventilator air outlet 3 or the defroster air outlet 4 can be increased or decreased. can be decreased or increased.

Reference numeral 23 denotes an air volume adjustment actuator that adjusts the opening degree of the air volume adjustment door 22, and its drive is controlled by the control means 13.

The switching actuators 14, 16, mix door actuator 20, and air volume adjustment actuator 23 are driven by negative pressure.

Reference numeral 24 denotes an air volume adjustment door opening degree sensor, which is provided on the air volume adjustment door 22 to detect the opening degree of the door 22 and outputs the opening degree as an air volume adjustment door opening degree signal C1.

Reference numeral 25 denotes a temperature setting means, which outputs a set temperature signal C2 in accordance with a setting operation by the occupant.

A head sensor 26 is provided in the upper part of the vehicle interior, detects the temperature of the upper part of the vehicle interior, and outputs the temperature as a head temperature signal C3.

A foot sensor 27 is provided in the lower part of the vehicle interior, detects the temperature of the lower part of the vehicle interior, and outputs the temperature as a foot temperature signal C4.

Reference numeral 28 denotes an outside air temperature sensor, which is installed outside the vehicle to detect outside air temperature and output an outside air temperature signal C5.

Reference numeral 29 denotes a solar radiation sensor, which is provided on the upper part of the instrument panel in the vehicle interior, detects the solar radiation amount, and outputs a solar radiation signal C6.

Reference numeral 30 is a changeover switch which selects either of the two air outlets 3 and 4 of the head side air outlet, and also selects which of the air inlets 10 and 11 to draw air from. A switching signal C7 is output.

Reference numeral 31 denotes an air volume control means, and the control means 1
3, the air volume adjustment door opening signal C1,
A set temperature signal C2, a head temperature signal C3, a foot temperature signal C4, an outside air temperature signal C5, and a solar radiation signal C6 are input, and calculations are performed using the set temperature signal C2, outside air temperature signal C5, and solar radiation signal C6. A head target temperature signal C11 and a foot target temperature signal C12 are determined, and both target temperature signals C11, C12 and both temperature signals C3, C4 are compared by temperature difference calculation, and the head side and foot side are compared. The air volume adjustment actuator 2 is adjusted so that the air volume from the air outlet on the side where the difference between the target temperature signal and the temperature signal is larger is increased.
This outputs an air volume adjustment actuator drive signal C21 that drives the air volume control actuator 3.

The air volume control means 31 is a target temperature calculation circuit that inputs and calculates the set temperature signal C2, outside temperature signal C5, and solar radiation signal C6 to determine and output a head target temperature signal C11 and a foot target temperature signal C12. 3
2, a first temperature difference calculation circuit 33 which inputs the two target temperature signals C11, C12, the head temperature signal C3, and the foot temperature signal C4, calculates a temperature difference, and outputs a temperature difference signal C13; a second temperature difference calculation circuit 34 which inputs the difference signal C13, calculates the temperature difference, and outputs the upper/lower difference signal C14; and the above-mentioned upper/lower difference signal C1.
4 and the air volume adjustment door opening signal C1, and outputs the air volume adjustment actuator drive signal C21 to the air volume adjustment actuator 23, and the temperature from the first temperature difference calculation circuit 33. Difference signal C13 and second temperature difference calculation circuit 34
input the vertical difference signal C14 from the blower 7.
and an air volume calculation circuit 37 that outputs an air volume signal C22 to a motor control circuit 36 that controls the rotation speed of the motor.

In addition, in the first temperature difference calculation circuit 33, the head target temperature Tsu, the foot target temperature Ts, and the head temperature
Tu, the head temperature difference ΔTu, which is the difference from the foot temperature T
(ΔTu=Tsu−Tu) and foot temperature difference ΔT _L (ΔT=Ts
-T) is calculated, and the second temperature difference calculation circuit 34 calculates the temperature deviation _ΔT (ΔT
=|ΔTu|−|ΔT _L |) is obtained.

The relationship between the vertical difference signal C14 and the air volume adjustment actuator drive signal C21 in the air conditioning door opening calculation circuit 35 is as shown in FIG.
If the value of temperature deviation ΔT is positive, the air volume adjustment door 22
The air volume adjustment actuator drive signal C21 is output so that the floor air outlet 5 is closed, and if it is negative, the air volume adjustment actuator drive signal C21 is outputted so that the floor air outlet 5 is opened.

Further, as shown in FIG. 4, the air volume calculation circuit 37 outputs an air volume signal C22 (blower voltage) to perform rotation speed control based on ΔT _O.

This ΔT _O is derived from the following two equations depending on the case.

One is _{the normal case, in which case if ΔT O exceeds} ±1 _℃ , _the blower 7 Air volume signal C22 (blower voltage) so that the rotation speed increases.
Output.

Note that T _R =Tu+T _L /2.

In addition, when performing air conditioning, it is partially different from the above. First, based on the temperature deviation ΔT, which is the difference between the head temperature difference ΔTu and the foot temperature difference ΔT _L , this temperature deviation ΔT is determined to be a predetermined temperature. It is determined whether the temperature exceeds b℃.

If ΔT<b°C, the air volume signal C22 is output in accordance with ΔT _O obtained in the same manner as above. However, when ΔT≧b℃, ΔT _O is calculated based on the difference between the target temperature Tsu and the actual temperature Tu on the head side, ΔT _O = Tu−Tsu......, and ΔT _O in this equation is Accordingly, an air volume signal C22 is output.

Reference numeral 38 is an air mix door opening degree calculation circuit, which uses both target temperature signals C11 and C12 and both temperature signals C3 and C4 inputted via the first temperature difference calculation circuit 33 to control the ventilator which is the head side air outlet. The temperature of the air blown out from the air outlet 3 or the defroster air outlet 4 and the temperature of the air blown out from the floor air outlet 5, which is the foot side air outlet, are determined and the air mix door is installed so that air at the desired temperature is blown out. A temperature control signal C23 is output to the mix door actuator 20 in order to adjust the opening degrees of the valves 17, 18, and 19.

39 is an actuator drive circuit which inputs a switching signal C7 inputted from the changeover switch 30, outputs a drive signal C24 to the switching actuators 14 and 16, and operates the inside/outside air switching door 11;
The positions of the vent door 15 and the differential door 21 are switched.

Next, the operation of the embodiment will be explained.

First, a case where cooling operation is performed will be explained.

For example, when the temperature itself is not that high, such as on a sunny spring day, but the sun is shining and the upper part of the vehicle interior is hot and the lower part is not so hot, if you operate the temperature setting means 25 to determine the set temperature Ts, Both target temperature signals C11 and C12 from the target temperature calculation circuit 32
The opening degree of the air mix doors 17, 18, 19 is adjusted by the air mix door opening calculation circuit 38 which inputs both the temperature signals C3 and C4 from the head sensor 26 and the foot sensor 27. Temperature-controlled air is blown out from the outlet 5.

At that time, the target temperature Ts at the feet is higher because the head is cold and the feet are warm in the ideal state, so the feet reach the target temperature faster, but the temperature on the head side is far from the target temperature. It's easy to become.

Therefore, in the above case, the temperature deviation ΔT is determined by the temperature difference signal C13 in the second temperature difference calculation circuit 34.
In this case, the temperature deviation ΔT is a positive value because the head temperature difference ΔTu is larger (see Figure 3). Air volume adjustment actuator drive signal C is sent to the air volume adjustment actuator 23.
21 is rolled.

In this way, when the air volume adjustment door 22 is closed,
Since the overall air volume from the blower 7 is constant, the air volume from the ventilator outlet 3 is increased, and the temperature on the head side is rapidly brought closer to the target temperature.

Also, during this cooling, if ΔT exceeds b℃, that is, the difference between the target temperature Tsu on the head side and the actual temperature Tu is the difference between the target temperature T _SL and the actual temperature T _L on the foot side. In this _{case ,} ΔT _O can _be expressed as The number of revolutions of the blower 7 is increased based on the calculation, and the cooling sensation is quickly given to the head side.

Next, a case where heating operation is performed will be explained.

For example, in the middle of winter when the weather is nice, when the temperature is low but the sun is shining and the lower part of the cabin is very cold and the upper part is relatively warm, if you use air conditioning, the air mix doors 17, 18, 19 is adjusted, and temperature-controlled air is blown out from the ventilator outlet 3 and the floor outlet 5.

At this time, since the head target temperature Tsu is higher, the head side reaches the target faster, whereas the foot side temperature tends to be far from the target temperature.

Therefore, in the above case, contrary to the case of cooling, the temperature deviation ΔT becomes a negative value, and the air volume adjustment actuator 23 is activated by the air volume adjustment door opening calculation circuit 35 to open the air volume adjustment door 22. A drive signal C21 is issued.

Thereafter, when the air volume adjustment door 22 is opened, the air volume from the floor outlet 5 increases and the temperature is rapidly brought closer to the target temperature.

Next, a second embodiment shown in FIG. 6 will be described.

In this embodiment, an air volume adjustment door 22 is provided below the heat core 9.

Next, a third embodiment shown in FIG. 7 will be described.

This embodiment is an example in which air volume adjustment doors 22 are provided at the ventilator outlet 3 and the floor outlet 5.

Therefore, the amount of air blown out from the floor outlet 5 can be further increased.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention may be modified without departing from the gist of the present invention. included.

(Effects of the invention) As described above, according to the invention, the target temperature on the feet side is set higher than the target temperature on the head side, which creates an ideal vehicle interior environment with a cold head and hot feet. In addition, by adjusting the opening degree of the air volume adjustment door, the temperature is adjusted to the side where the difference between the target temperature and the actual temperature is greater between the head side and the feet side. Since a large amount of air can be blown out, the temperature can be brought closer to the target temperature more quickly and discomfort can be reduced.

Furthermore, during cooling, even if the average temperature inside the vehicle is close to the set temperature, if the target temperature and the actual temperature in the upper part of the vehicle are far apart, that is, the degree to which the temperature is far from the ideal state of cold head and warm feet. When the temperature is large, the number of rotations of the blower is increased in order to increase the amount of air blown to the head side, so the air blown to the head side provides a cooling sensation and allows the target temperature to be reached more quickly, reducing head cold and foot heat. It also has the effect of creating an optimal environment for

In addition to the above-mentioned effects, in the third embodiment, since the air volume adjustment door 22 is provided on both the head side and the foot side, the air volume on the foot side can be increased. You can get closer to the optimal indoor environment more quickly.

[Brief explanation of the drawing]

Fig. 1 is a system diagram showing the automatic control air conditioner according to the first embodiment of the present invention, Fig. 2 is a system diagram showing the main parts of the equipment of the first embodiment, and Fig. 3 is a system diagram showing the main parts of the equipment of the first embodiment. An explanatory diagram showing the relationship between operation and temperature. FIG. 4 is an explanatory diagram showing the relationship between operation and temperature of the main parts of the device of the first embodiment. FIG. An explanatory diagram showing the relationship with temperature, Fig. 6 is a system diagram showing the automatic control air conditioner of the second embodiment, Fig. 7 is a sectional view showing the automatic control air conditioner of the third embodiment, and Fig. 8 is a conventional system diagram. It is a system diagram showing an example. 1... System chamber, 2... Internal and external air suction duct, 3... Ventilator outlet (head side outlet), 4... Defroster outlet (head side outlet),
5... Floor outlet (foot outlet), 6... Air flow path, 22... Air volume adjustment door, 23... Air volume adjustment actuator, 24... Air volume adjustment door opening sensor, 25... Temperature setting means , 26... Head sensor, 27... Feet sensor, C3... Head temperature signal, C4... Feet temperature signal, C11... Head target temperature signal, C12... Feet target temperature signal, C21
...Air volume adjustment actuator drive signal.

Claims (1)

[Scope of Claim for Utility Model Registration] A system chamber having an air flow path and a blower extending from an internal/external air intake duct to a head-side outlet and a foot-side outlet; an air volume adjustment door that adjusts the amount of air blown from the side air outlet and the foot side air outlet; an air volume adjustment actuator that changes the opening degree of the air volume adjustment door; and an air volume adjustment actuator that detects the opening degree of the air volume adjustment door and adjusts the air volume adjustment door opening degree. An opening sensor that outputs a signal, a temperature setting device that outputs a set temperature signal according to a setting operation by an occupant, a head sensor that outputs the temperature of the upper part of the vehicle interior as a head temperature signal, and a temperature sensor that outputs the temperature of the lower part of the vehicle interior. a foot sensor that outputs as a foot temperature signal, and an air volume adjustment actuator drive signal and a blower that input the air volume adjustment door opening signal, set temperature signal, head temperature signal, and foot temperature signal to drive the air volume adjustment actuator. an air volume control means for outputting a blower drive signal for driving a blower, the air volume control means determining a head target temperature signal and a foot target temperature signal of a higher temperature based on the set temperature signal, Both target temperature signals and both temperature signals are compared, and an air volume adjustment actuator drive signal is output so that the air volume from the air outlet on the side where the difference is larger is larger. The device is configured to output a blower drive signal that increases the rotation speed of the blower when the difference between the target temperature and the actual temperature of the foot side is larger than the difference between the target temperature and the actual temperature of the foot side by a predetermined value or more. Features an automatically controlled air conditioning system.