JPS61105204A - Air conditioning device for car - Google Patents

Abstract

PURPOSE:To increase air conditioning efficiency by compensating one of the set temperature for a front seat and a rear seat so as to reduce a difference between said set temperatures when it is above a certain value, in an air conditioning system which carries out air conditioning of a front seat space and a rear seat space of a car separately. CONSTITUTION:A rear-seat duct 20 is connected to a front-seat air conditioning device 1 having a heat exchange quantity adjusting means 100 via connecting passages 23a, 23b, and a rear-seat air mix door 24 which adjusts the mixing rate of a cold air and a hot air which are sent from the passages 23a, 23b respectively, is provided at the confluence part of the both passages 23a, 23b. Temperature setting devices 200, 300 which set the temperatures of the front-seat and rear-seat spaces, are provided and the magnitude of the difference between the both let values is judged by a judging means 400. When the difference is judged to be more than a certain value, one of the set values for front and rear seat temperature is compensated so as to reduce said difference by a compensating means 500, and the adjusting means 100 controls the air mix door 24 through a control means 600, in accordance with a compensated set value.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an air conditioner that can separately air condition the front seat space and the rear seat space of an automobile, and relates to the adjustment of the temperature of blown air.

(Prior Art) Conventionally, this type of automotive air conditioner is known, for example, as disclosed in Japanese Patent Application Laid-Open No. 58-167819. Such an air conditioner divides one heater core in the main duct, partitions the downstream side of the heater core into two passages with a partition wall, and includes an air mix door to control the temperature of the air flowing into the two passages. Each is provided in front of the heater core. Then, air outlets are opened in each of the plurality of spaces in the vehicle interior through the two passages, and a temperature setting device is provided for each of the spaces, making it possible to set the temperature of each space. ing.

(Problems to be Solved by the Invention) However, in the above conventional example, for example, the set temperature of the front seat temperature setting device is higher than the temperature of the rear seat temperature setting device.
If the set temperature difference is large, even if the air blown to the rear seat space is sufficient by slightly heating the air passing through the evaporator, the air blown to the front seat space will be larger than the air passing through the evaporator. There was a problem in that this required heating, which resulted in large heat loss and inefficient air conditioning.

Therefore, 1 the present invention solves the drawback of the conventional example due to the fact that the front seat temperature and the rear seat temperature are set independently, and establishes a certain relationship between the front seat temperature setting device and the rear seat temperature setting device. It is an object of the present invention to provide an air conditioner for an automobile that can perform air conditioning with high performance and efficiency.

(Means for solving the problem) As shown in FIG. 1, the automobile air conditioner according to the first invention includes a rear seat duct 20 in a front seat air conditioning unit 1 having a heat exchange amount adjusting means 100. A rear seat near-mix door 24 that is connected via the connection passages 23b, 23b and that adjusts the mixing ratio of cold air and warm air from the front seat air conditioning unit 1 that enters the rear seat duct 20 is a main body part. It is set in.

A front seat temperature setting device 20 sets the temperature of the front seat space.
0, and a rear seat temperature setting device 300 that sets the temperature of the rear seat space.
And this front seat temperature setting device 200 and rear seat temperature setting device 300
a determination means 400 for determining the magnitude of the difference between the set values, and a determination result of the determination means 400 that determines the set value of either the front seat or the rear seat temperature when the difference between the set values is determined to be greater than or equal to a predetermined value; a set value correcting means 500 that corrects the difference between the set values so that the difference between the set values becomes small; and a heat exchange amount adjusting means 100 or Rear seat air mix door 2
A control means 600 for controlling the adjustment amount of No. 4 is provided.

Furthermore, a second invention is the first invention in which the front seat temperature setting device 200 is provided with display means 700 for displaying the temperature setting range of the rear seat temperature setting device 300.

(Function) Therefore, in the present invention, when the difference between the set values of the front seat temperature setter and the rear seat temperature setter is greater than or equal to a predetermined value, one of the set values is corrected so that the difference between the set values becomes smaller. However, since the front seat temperature or the rear seat temperature is set to the corrected value, efficient air conditioning control can be performed without a large difference in the air outlet temperature between the front seat space and the rear seat space.
In the second invention, the effective temperature setting range of either the front seat temperature setting device and the rear seat temperature setting device is displayed so that the difference between the setting values of the front seat temperature setting device and the rear seat temperature setting device does not exceed a predetermined value. This makes it possible to set an appropriate temperature, thereby achieving the above object.

(Example) Embodiments according to the present invention will be described below with reference to the drawings.

In FIG. 2, one embodiment of the main body of the automobile air conditioner according to the present invention is shown. 3 and an outside air inlet 4 are formed in a bifurcated form, and an inside/outside air switching door 5 is provided in the divided part,
The air to be introduced into the main duct 2 is selected by the inside/outside air switching door 5 between inside air and outside air.

The main blower 6 is for taking air into the main duct 2 and sending it downstream, and an evaporator 7 is provided further downstream of the main blower 6.

The evaporator 7 constitutes a cooling cycle together with a compressor (not shown) and the like, and cools the air passing through the evaporator 7. A cold air passage 8 is provided behind the evaporator tuff.

Further, a heater core 9 is arranged downstream of the evaporator 7, and a front seat air mix door 10 is provided in front of the heater core 9. This air mix door 10 for the front seat has an amount of air that is heated by passing through a heating passage 12 in which a heater core 9 is arranged and an amount of air that passes through a bypass passage 13 that bypasses the heater core 9 according to its opening degree. The heating passage 12 and the bypass passage 13 are merged in the main air mix chamber 14 on the downstream side of each, and the air that has passed through each is mixed in the main air mix chamber 14 and The temperature of the air blown into the seat space VA is adjusted. Further, the front seat air mix door 10 is connected to a first actuator 11 and is moved by this first actuator 11.

That is, the main blower 6, the evaporator 7, the heater core 9. The front seat air mix door 10 and the first actuator 11 constitute a heat exchange amount adjusting means 100.

The air mixed in the main air mix chamber 14 is then divided into a front seat vent outlet 15, a front seat heat outlet 16, or a defrost outlet 17 and blown out into the front seat space in the vehicle interior, and the air is blown out into the front seat space in the vehicle interior. Seat mode door 18a, 18
This is done by manipulating b.

The rear seat blower unit 19 has a rear seat blower 21 that sucks air into a rear seat duct 20 and sends it to the downstream side. An air mix chamber 22 is provided. The rear seat air mix chamber 22 and the main duct 2 are
They are connected via first and second connection passages 23a and 23b. Thus, the first connection passage 23a opens between the evaporator 7 and the heater core 9, that is, into the cold air passage 8. Further, the second connection passage 23b is connected to the main duct 2 on the downstream side of the heater core 9.

A rear seat air mix door 24 is provided at the portions of the first and second connection passages 23a and 23b that open into the rear seat air mix chamber 22. The amount of air introduced into the rear seat air mix chamber 22 through the connection passages 23a and 23b is adjusted according to the opening degree. This rear seat air mix door 24 is connected to a second actuator 25, and is moved by this second actuator 25 to change its opening degree, thereby allowing hot air and cold air to be blown into the rear seat space VB. By adjusting the mixing ratio, the temperature of the air in the rear seat space VB is adjusted.

The rear seat duct 20 is divided into two parts on the downstream side of the rear seat blower 21, and a rear seat mode door 26 is provided in the divided part. It is operated by a rear seat mode setting lever 27 provided on the panel. In addition, one of the divided ducts opens into the rear seat space VB via the rear seat center vent outlet 28, and the other duct is further divided to the left and right, and the rear seat heat outlet 29a,
It opens to the rear seat space VB via 29b, and by operating the rear seat mode door 26, the air outlet for blowing air into the rear seat space VB can be selected.

In FIG. 3, an outline of an electric control device for controlling the main blower 6, front seat air mix door lO1, rear seat blower 21, and rear seat air mix door 24 is shown. It has a computer 30. This microcomputer 30 is a central processing
It is of a type well known per se, having a random access memory RAM, a read-only memory ROM, an input/output port I10, etc. The microcomputer 30 receives a front seat interior temperature TRF from a front seat interior temperature sensor 31 that detects the front seat space temperature in the vehicle interior, and a rear seat interior temperature sensor that detects the rear seat space temperature in the vehicle interior. Rear seat cabin temperature TRR1 from sensor 31' Solar radiation amount TsF from front seat solar radiation sensor 32 that detects the amount of solar radiation entering the front seat space VA, rear seat space VB
an outside air temperature sensor 33 that detects the outside air temperature of the solar radiation amount TSR1 from the rear seat solar radiation sensor 32' that detects the amount of solar radiation that enters the
, the front seat temperature set temperature TDF from the front seat temperature setter 200 that sets the temperature of the front seat space VA, and the rear seat set temperature TDF from the rear seat temperature setter 300 that sets the temperature of the rear seat space VB. The TDR is selected via the multiplexer 34, converted into a digital signal via the A/D converter 35, and inputted. Then, the input signal is arithmetic-processed according to a predetermined program to determine a control signal, and the first actuator 11, the rear Blower 21 for seats, air mix door 24 for rear seats
An example of the control operation of the microcomputer 30 is shown as a flow chart in FIG.

That is, in FIG. 4, the microcomputer 30 is
Step 37 by closing the main switch
Execution of the program is started from , and in the next step 38 initial settings such as clearing the contents of the central processing unit CPU are performed, and the process proceeds to the next step 39 .

In step 39, a selection signal is output to the multiplexer 36 to output the signals TRF and TP-R.

Input TsF, TSR, TA, TDF, and TDR, and proceed to step 40.

In the next step 40, the settable range of the rear seat temperature setting device 300 is displayed based on the TDF. For example, the fifth
As shown in the figure, a display LED 53 is disposed on the rear seat temperature setting panel 52 where the rear seat temperature setting device 300 is disposed, and the set value TDF of the front seat temperature setting device 200 is 25 degrees Celsius.
, if α=2°C, the range of 2°C above 25 is the LED 5.
3 (hatched area in the figure), and the process advances to the next step 41.

In the next step 41, it is determined whether TDR is less than a predetermined value α than TDF. If "Yes", proceed to step 42 and correct the TDF-α to correct the rear seat set temperature T'D.
As R, the process proceeds to step 46.

If dl NOI', proceed to step 43 and TD
Determine whether R is greater than a predetermined value α from TDF, and
s'', the process proceeds to step 44, where TDF+α is set as the corrected rear seat set temperature T'DR, and the process proceeds to step 46. On the other hand, in the case of ``No'', the process proceeds to step 45, where T'DF:T
The process proceeds to step 46 as DF. Here, the predetermined value α is the maximum allowable temperature difference between TDF and TDR that is determined empirically or experimentally so that the air conditioning control between the front seat space and the rear seat space does not become inefficient.

Then, in step 46, the signal TRF.

A total signal T for the front seats is calculated based on TSF, TA, and TDF according to the following equation.

T = (TRF-25) + K1 (Ts #-25)
2 in 10 (TA-25) - 3 in 10 (TD F-25)
(1) However, K1-3 is the gain of the setting device for each census.

Then, proceeding to the next step 47.48, the rotation speed of the main blower 6 and the first
A control signal is calculated so that the position of the air mix door 10 corresponds to the control characteristics previously stored in the read-only memory ROM (see FIG.
a, output to 36b.

In the next step 49, the signal TRR.

A total signal S for the rear seats is calculated based on TSR, TA, and T'DR according to the following equation.

S = (TRP--25) + to 4 (TS R-25) +
K 5 (TA-25) - to 6 (T'DR-25)
(2) However, K4 to K6 are the gains of each sensor or setting device.

Then, the next step 50. ．． Proceeding to step 51, the rotation speed of the rear seat blower 21 and the position of the rear seat air mix door 24 are determined from the control characteristic (previously stored in the read-only memory ROM) with respect to the total signal S obtained by equation (2). (See Figure 7)
A control signal is calculated so that When the processing of steps 50 and 51 is completed, the process returns to step 41 again, and such control is performed in a circular manner.

In this embodiment, steps 41 and 42°4
The predetermined values α in step 3.44 were all set to the same value, but α in step 41.43 was set to αl and α2, respectively, and the settable range of TDR centered on TDF was set asymmetrically on the + side and the − side. , α in steps 42°44 to β1. β2 (
However, β1. β2 αl.

As α2), the actual correction amount may be different from α in steps 41 and 43.

In addition, when the difference between the set values of the front seat temperature setting device 200 and the rear seat temperature setting device 300 is equal to or greater than a predetermined value, the front seat temperature setting TDF
Although the rear seat temperature T'OP is newly set by correcting the rear seat temperature T'OP, the rear seat temperature TDR may be corrected and the rear seat temperature T'DF is newly set, and TDR may be used as is.

That is, in this embodiment, the main blower 6, the evaporator 7, the heater core 9, and the front seat air mix door 10
, the heat exchange amount adjusting means 100 shown in FIG. 1 from the first actuator 11, the determining means 400 shown in FIG. 46.47 and 51
This constitutes the control stage 600 in the figure, and step 40 constitutes the display means 700 in the figure.

(Effect of the invention) As described above, according to the present invention, when the difference between the front seat temperature setting and the rear seat temperature setting is equal to or greater than a predetermined value, the front seat temperature setting or the rear seat setting temperature is Correct the set temperature,
Since the air conditioning is controlled so that the front seat temperature or the rear seat temperature matches this correction value, even if the set values of the front seat temperature setting device and the rear seat temperature setting device differ greatly due to an operator error, etc., the system is efficient. Air conditioning control is performed.

In addition, in the second invention, since the temperature setting range is displayed, inappropriate temperature setting of the temperature setting device can be prevented, and therefore, efficient air conditioning control can be achieved. It is something that plays.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an automotive air conditioner according to the first invention, Fig. 2 is a block diagram showing a main body part in an embodiment of the present invention, and Fig. 3 is an electric control device used in the above embodiment. FIG. 4 is a flowchart showing the control routine of the microcomputer in electrical control, FIG. 5 is a front view schematically showing the front seat temperature setting panel and the rear seat temperature setting panel, and FIG. 6 is the main blower. FIG. 7 is a characteristic diagram showing the control characteristics of the rear seat blower and the rear seat air mix door. 1...Front seat air conditioning unit, 2...Main duct, 6
...Main blower, 9...Blower unit for rear seat, 2
0... Rear seat duct, 21... Rear seat blower, 23
a, 23b...Connection passage. 24... Rear seat air mix door, 100... Heat exchange amount adjustment means, 200... Front seat temperature setting device, 300...
... Rear seat temperature setting device, 400... Judgment means, 400.
...Set value correction means, 600...Control means, 700.
...Display means.

Claims (1)

[Claims] 1. A rear seat duct is connected to a front seat air conditioning unit having a heat exchange amount adjusting means, and cold air and warm air from the front seat air conditioning unit are mixed into the rear seat duct. In an automobile air conditioner having a rear seat air mix door that adjusts the ratio, a front seat temperature setting device sets the temperature of the front seat space, a rear seat temperature setting device sets the temperature of the rear seat space, A determining means for determining the magnitude of the difference between the set values of the front seat temperature setting device and the rear seat temperature setting device; a set value correction means for correcting the set value of either the seat or the rear seat temperature so that the difference between the set values becomes small; 1. An air conditioner for an automobile, comprising a heat exchange amount adjusting means or a control means for controlling an amount of adjustment of an air mix door for a rear seat. 2. A rear seat duct that connects a rear seat duct to a front seat air conditioning unit that has heat exchange amount adjustment means, and that adjusts the mixing ratio of cold air and hot air from the front seat air conditioning unit that enters the rear seat duct. A front seat temperature setting device for setting the temperature of the front seat space, a rear seat temperature setting device for setting the temperature of the rear seat space, and the front seat temperature setting device for an automobile air conditioner having an air mix door for the vehicle. and a determination means for determining the magnitude of the difference between the set values between the set value and the rear seat temperature setting device; a set value correcting means for correcting one set value so that the difference between the set values becomes small; and a heat exchange amount adjusting means or An air conditioner for an automobile, comprising a control means for controlling the amount of adjustment of an air mix door for a rear seat, and a display means for displaying a temperature setting range of the front seat temperature setting device or the rear seat temperature setting device. Device.