JPH066402B2 - Vehicle air conditioning controller - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air-conditioning control device, and more particularly to a vehicle air-conditioning control device that uses a cold air bypass unit to send cool air to the head of an occupant for air conditioning. Is.

(Prior Art) Conventionally, there is a method of using a cold air bypass unit in order to lower the temperature of the head of an occupant during solar radiation. For example, Japanese Utility Model Publication No. 59-34497 and Japanese Utility Model Publication No. 60-15.
In Japanese Patent No. 1710, etc., an opening is provided immediately after the downstream side of the evaporator to attach a cold air bypass door, and the other opening of the cold air bypass duct having this cold air bypass door as one end is used as a vent outlet or exclusively. It is disclosed that the air-conditioning feeling is improved by cooling the head of the occupant during insolation, especially when the insolation is maximum.

(Problems to be Solved by the Invention) Conventionally, the cold air bypass door is controlled to be opened and closed independently of the control of other air conditioners depending on the cabin temperature or the amount of solar radiation. A considerable ratio to the main air volume (about 50%)
If it does not have the desired effect, the desired effect cannot be expected. However, when arranging the cold air bypass duct, the space inside the instrument panel of the car is narrowed down by other necessary members, for example, the arrangement of the main duct, so that a cold air bypass duct of a size that can secure a sufficient amount of the cold air bypass is provided. Since it is difficult to arrange them, the amount of cold air bypass can actually be about 10% of the total amount of air, and it cannot be said that there is a sufficient cooling effect.

Therefore, it is necessary to compensate for the insufficient amount of cold air bypass by controlling other air conditioners such as a compressor and a blower in conjunction with the cold air bypass door.
However, the cold air bypass door control (head temperature control) linked with other equipment cannot exist independently, and it is also necessary to be in proper harmony with the main temperature control by the integrated signal. .

Therefore, the present invention solves the above-mentioned conventional problems,
It is an object of the present invention to provide a vehicle air conditioning control device in which a head temperature control using a cold air bypass and a main temperature control control by a comprehensive signal are properly harmonized and a good air conditioning feeling is obtained.

(Means for Solving the Problem) The vehicle air conditioning control device according to the present invention, as shown in FIG. 1, has the cooling means 8, the heating means 9 and the air mix door 10 arranged in the main passage 1. And a cold air bypass duct 20 for guiding the temperature from the wake of the cooling means 8 to the passenger compartment while controlling the temperature by
In the vehicle air conditioning control device having the opening adjustment means 21 in the cold air bypass duct 20, at least the room temperature,
Main total signal calculation means 100 for calculating a main total signal corresponding to the heat load in the room based on the outside air temperature and the set temperature, and at least the temperature near the head of the occupant, the head set temperature, and the amount of solar radiation, the head of the occupant. Head total signal calculation means 140 for calculating the head total signal corresponding to the heat load in the vicinity, and each air conditioner 7, 10, 49 controlled by the main total signal.
A main control value computing means 120 for computing control values such as
Head control value calculation means 160 for calculating control values of each air conditioner controlled by the head total signal and one of the air conditioners 7, 10, 49 which is the calculation result by the main control value calculation means 120. Each air conditioner 7, which is the control value of all or all of the control values and the calculation result of the head control value calculation means 160,
Based on the control value determination means 180 for determining the control condition by comparing one or a plurality of control values of 10, 49 and the control result by the control value determination means 180 or the control value based on the main integrated signal. Control value selection means 200 for selecting one of the control values according to the section total signal, and the control value selection means 2
Each air conditioner 7, based on the control value selected by 00,
The air-mixing device 10, the blower 7, and the variable capacity compressor 49 are provided as the control devices to be compared with the control value determining device 180. I am using.

(Operation) Therefore, in the present invention, the main general signal calculating means 120 and the head general signal calculating means 160 respectively calculate the main general signal and the head general signal based on various data such as the outside air temperature, and The main control value calculation means 120 and the head control value calculation means 160 respectively calculate the control values of the air conditioning equipment for the main integrated signal and the head integrated signal. And
The control value determination means 180 compares and determines the control values of the main integrated signal and the head integrated signal of each air conditioner, and the determination result is sent to the control value selection means 200. The control value selection means 200 selects either the control value based on the main integrated signal or the control value based on the head integrated signal as a control value for performing control based on the sent determination result. The air conditioner drive unit 220 operates the air conditioner based on the selected control value.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, the vehicle air-conditioning control device is provided with an intake door switching device 2 on the most upstream side of the main passage 1, and the intake door switching device 2 is divided into an inside air inlet 3 and an outside air inlet 4 inside and outside. An air switching door 5 is arranged, and the inside / outside air switching door 5 is operated by an actuator 6 so that the air introduced into the main passage 1 can be selected from inside air and outside air.

The blower 7 sucks air into the main passage 1 and blows the air downstream, and an evaporator 8 and a heater core 9 are provided behind the blower 7.

The evaporator 8 is connected to the compressor 49, a condenser (not shown), and the like to form a cooling cycle, and cools the air sucked into the main passage 1. The heater core 9 is connected to an engine (not shown). Cooling water circulates to heat the air.

The compressor 49 is of a variable capacity type, and for example, a wobble plate type is used. This wobble plate type compressor 49 is a known one having a capacity varying device 53 for electrically controlling the discharge capacity from the outside, and a detailed description thereof will be omitted. This compressor 4
9 is driven by the power of a vehicle engine (not shown) via an electromagnetic clutch 51.

An air mix door 10 is provided in front of the heater core 9 described above.
By adjusting the opening degree Θ of the actuator 11 with the actuator 11,
The amount of air passing through the heater core 9 and the amount of air bypassing the heater core 9 are changed, and as a result, the temperature of the blown air is controlled.

The opening Θ of the air mix door 10 is 0% when the position of the air mix door 10 is the full cool position (I position),
It is 100% at the full heat position (II position).

The downstream end of the main passage 1 has a defrost outlet 1
2, the vent outlet 13 and the heat outlet 14 are divided into openings in the vehicle compartment 15, and the mode door 1 is formed in the divided portion.
6, 17, 18 are provided, and the mode doors 16, 1
By operating the actuators 7 and 18 with the actuator 19, a desired blowout mode can be obtained.

In addition, this device is provided with a cold air bypass duct 20 that bypasses a part of the main passage 1. One end of the cold air bypass duct 20 is downstream of the evaporator 8 of the main passage 1 and upstream of the air mix door 10.
The other ends are connected in front of the vent outlets 13, respectively, so that part of the air that has passed through the evaporator 8 can be directly supplied to the vent outlets 13. The amount of cold air supplied through the bypass duct 20 can be adjusted by controlling the opening degree of the cold air bypass door 21 with the actuator 22.

25 is a representative temperature detector for detecting a representative temperature T _R of the passenger compartment, is attached to the instrument panel or the like (not shown). Further, 26 is a head temperature detector that is attached to the ceiling of the vehicle or the like and detects the temperature _TRh around the head, 27
Is an outside air temperature detector for detecting the temperature T _A outside the vehicle compartment, 28 is a solar radiation detector for detecting the amount of solar radiation T _S , and 29 is an evaporator 8 or an evaporator 8 provided immediately after the evaporator 8 for cooling the air by the evaporator 8. 8 is a mode sensor for detecting the temperature of 8 or the temperature of the air passing through the evaporator 8, 30 is a water temperature sensor for detecting the temperature of the cooling water of the engine, and these output signals are selected via a multiplexer (MPX) 31. It is converted into a digital signal through the A / D converter 32 and input to the microcomputer 33.

Further, 34 is an opening detector that detects the opening of the cold air bypass door 21, 35 is a position detector that detects the positions of the mode doors 16, 17 and 18, and 36 is an opening detector that detects the opening of the air mix door 10. The output signals are also input to the microcomputer 33 via the multiplexer 31 and the A / D converter 32.

Further, the microcomputer 33 includes an operation panel 3
7. Output signals from the temperature setter 38 and the head temperature setter 39 are input.

The operation panel 37 has a blowout mode of VENT mode, BI
-L mode, HEAT mode, DEF / HEAT mode, DEF
Mode switches 40a-4 to manually set the mode
0e, A / C switch 4 for moving the cooling cycle
1, the rotation speed of the blower 7 is low (FAN1), medium speed (F
AN2), fan switches 42a to 42c for switching to high speed (FAN3), an AUTO switch 43 for automatically controlling all the air conditioners such as the blower 7, and an OFF switch 44 for stopping the driving of the air conditioners.

The temperature setting device 38 includes up / down switches 25a, 45.
b and a display section 46 for displaying the set temperature, and the set temperature shown on the display section 46 can be changed within a predetermined range by operating the up / down switches 45a and 45b. Further, the head temperature setting device 39 includes, for example, a dial type knob 47, and has a head setting temperature T _sh within a preset predetermined range (COLD to WARM).
Can be changed. The temperature setting device 38 and the head temperature setting device 39 may be of a type in which a template bar is slid.

The microcomputer 33 is a well-known one having a central processing unit (CPU), a read-only memory (ROM), a random access memory (RAM), an input / output port (I / O), etc., which are not shown, and the various inputs described above. Based on the signals, the actuators 6, 11, 19, 22, the motor of the blower 7, the capacity varying device 53, and the electromagnetic clutch 5
1 to each of the control signals via the drive circuits 48a to 48g to control the drive of the doors 5, 10, 16, 17, 18, and 21, the rotation control of the motor, and the drive control of the variable capacity device 53 and the electromagnetic clutch 51. Do.

Next, an example of control operation of the microcomputer 33 will be described.

FIG. 5 shows a flowchart of the total signal calculation routine. Start from step 50, step 5
2, the detected values of the vehicle interior representative temperature detector 25, the head temperature detector 26, the solar radiation detector 28, the outside air temperature detector 27, the mode sensor 29, etc. are detected by the microcomputer 33.
Performs data input processing for input to. Next step 54
In step ₁ , a total signal T ₁ (main total signal) for main temperature control for controlling the vehicle interior temperature is calculated. This total signal T _I is calculated by assuming that the vehicle interior temperature T _R , the outside air temperature T _A , the insolation amount T _S , the evaporator wake temperature T _B , and the vehicle interior preset temperature T _St are T _I = T _R + K _A T _A + K _S T _S −K _B T _B + K _st T _st + C ₁ (where K _A , K _S , K _B and K _St are gain constants and C _I is a calculation constant).

In the next step 56, a total head temperature control signal T ₂ (head total signal) for controlling the head temperature is calculated with respect to the main temperature control total signal T ₁ . When the head temperature is T _Rh , the solar radiation amount is T _S , and the head setting temperature is T _Sh , the total signal T ₂ is calculated as follows: T ₂ = K _H T _Rh + K _S T _S −K _Sh T _Sh + C ₂ (However, K _H , K _S , and K _Sh are gain constants, C ₂ is a calculation constant)
By. In the next step 58, the control value of each air conditioner (blower 7, air mix door 10, compressor 49) controlled by the total signal T ₁ is calculated as shown in FIG. In the figure, Θ _m is the opening of the air mix door 10, B _m is the air volume of the blower 7,
C _m is the outlet temperature of the compressor. Next step 6
At 0, as shown in FIG. 7, each air conditioner controlled by the total signal T ₂ (blower 7, air mix door 10, compressor 49, cold air bypass door 21).
The control value of is calculated. In the figure, Θ _h is the opening of the air mix door 10, B _h is the air volume of the blower 7, C _h is the outlet temperature from the evaporator under the control of the variable compressor 49, and Θ _CB is the opening of the cold air bypass door 21. . Subsequent to step 60, the control value selection routine of step 62 (described later) is performed. In this step 62,
The control values such as the opening degree of the air mix door 10 and the air volume of the blower 7 in the comprehensive signals T ₁ and T ₂ are compared with each other, and according to the magnitude relation, the control value according to the comprehensive signal T ₁ or the comprehensive signal T ₂ is used. Decide whether to select a control value. In the next step 64, each air conditioner (air mix door 10,
The air conditioner in the vehicle compartment is controlled by driving the blower 7 or the like, and the process ends via step 66.

Next, the control of the flowchart of the control value selection routine shown in FIG. 4 will be described.

Starting from step 70, in step 72, it is determined whether or not the vent outlet 13 is used. If yes, go to step 74, otherwise go to step 82.

In step 82, a control value based on the main signal T ₁ for main temperature control is selected for controlling the vehicle interior temperature.

On the other hand, in step 74, the magnitude relationship between the opening degree Θ _m of the air mix door 10 controlled by the comprehensive signal T ₁ and the opening degree Θ _h of the air mix door 10 controlled by the comprehensive signal T ₂ is compared, and Θ _m < If Θ _h , the process proceeds to step 80, and the control value by the integrated signal T ₂ for head temperature control is selected for controlling the vehicle interior temperature.

On the other hand, if Θ _m > Θ _h , proceed to step 76. In step 76, the air volume B _m of the blower 7 controlled by the total signal T ₁ is compared with the air volume B _h controlled by the total signal T ₂ , and B _m
If <B _h , proceed to step 80. In step 78, the blowout temperature C _m from the evaporator under the control of the variable compressor 49 under the control of the total signal T ₁ is compared with the blowout temperature C _m from the evaporator under the control of the variable compressor 49 under the control of the total signal T _{2. If m} > C _h , the process proceeds to step 80, and if C _m ≤C _h , the process proceeds to step 82. In step 82, as described above, the control value based on the total signal T ₁ for main temperature control is selected for controlling the vehicle interior temperature. This step 82 and the step 80
After the processing of (1), the overall signal calculation routine is returned via step 84.

As described above, at least one set among the control values of the opening degree of the air mix door 10 in the comprehensive signals T ₁ and T _2, the air flow rate of the blower 7, and the blowout temperature from the evaporator is indicated by an inequality sign in the flowchart. If the above condition is satisfied, the control value by the total signal T ₂ (for head temperature control) is selected, and if none of the above conditions are satisfied, the control value by the total signal T ₁ (for main temperature control) is selected. This is because each air conditioner is controlled based on the comprehensive signal on the side where a feeling of cool air near the head can be obtained even a little.

The control of the discharge temperature C from the evaporator by the control of the variable compressor 49 will be briefly described. Specifically, it is performed by changing the discharge capacity by the capacity variable device 53. For example, the applicant has already applied for it. Detailed specific examples are shown in Japanese Patent Application No. 63-153323.

FIG. 5 shows another embodiment of the control value selection routine, and the flow chart will be described below.

Starting from step 90, it is determined in step 92 whether or not the vent outlet 13 is used. If it is being used, the process proceeds to step 96, and if it is not being used, the process proceeds to step 94. In this step 94, the total signal T for main temperature control for controlling the vehicle interior temperature is set.
Select the control value by ₁ .

On the other hand, in step 96, the magnitude relationship between the opening Θ _m of the air mix door 10 controlled by the comprehensive signal T ₁ and the opening Θ _h of the air mix door 10 controlled by the comprehensive signal T ₂ is compared, and Θ _m < If Θ _h , proceed to step 98, Θ _m
If ≧ Θ _h , the process proceeds to step 100. This step 1
At 00, the same processing as step 94 is carried out and the routine proceeds to step 102. Further, in step 98, a control value based on the integrated signal T ₂ for head temperature control is selected for controlling the vehicle interior temperature, and the process proceeds to step 102. Step 10
2, the air volume B _{m of} the blower 7 controlled by the total signal T ₁
And the air volume B _{h under} the control of the total signal T ₂ are compared, and B _m <
If B _h , the process proceeds to step 104, and if B _m ≧ B _h , the process proceeds to step 106. In step 104, the same processing as in step 98 is performed, and the process proceeds to step 108.
At step 106, the same processing as that at step 94 is performed and the routine proceeds to step 108. In step 108, the blowout temperature C _m from the air compressor under the control of the variable compressor under the control of the total signal T ₁ is compared with the blowout temperature C _h from the evaporator under the control of the variable compressor under the control of the total signal T ₂ , and C _m >. If C _h , the process proceeds to step 110. If C _m ≤C _h , the process proceeds to step 112. In step 110, the same processing as in step 98 is performed, and the process returns to the main routine via step 114.
Further, in step 112, the same processing as in step 94 is performed, and then the process returns to the main routine via step 114.

As described above, when the control values of the opening degree of the air mix door 10, the air volume of the blower 7, and the blowout temperature from the evaporator at the comprehensive signals T ₁ and T ₂ satisfy the conditions indicated by the inequality signs in the flowchart, respectively. The control value by the signal T ₂ (for head temperature control) is selected, and when the conditions are not satisfied, the control value by the comprehensive signal T ₁ (for main temperature control) is selected. That is, each air conditioner is independently controlled by either the total signal T ₁ or T ₂ according to a predetermined condition of the control value of each air conditioner of the total signals T ₁ and T ₂ .

(Effects of the Invention) As described above, in claims 1 to 4, the main signal T ₁ for the main temperature control and the total signal T ₂ for the head temperature control are respectively calculated, and controlled by them. Since the control value by the comprehensive signal T ₁ and the control value by the comprehensive signal T ₂ are automatically used properly according to the magnitude of one or a plurality of control values of the air conditioner, the main temperature control is adversely affected. It is possible to effectively reduce only the temperature in the vicinity of the occupant's head without affecting the temperature. Also, since the head temperature setting range can be widened, it is possible to further meet the needs of the user,
The product value can be improved.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing a configuration of the present invention, FIG. 2 is a configuration diagram showing a vehicle air conditioning control device in an embodiment of the present invention, and FIG. 3 is a general signal calculation routine of a microcomputer used in the same. 4 is a flow chart showing an embodiment of a control value selection routine of the microcomputer, FIG. 5 is a flow chart showing another embodiment of a control value selection routine of the microcomputer, and FIG. 6 is a main temperature. A characteristic diagram showing the relationship between the total signal T ₁ for adjustment and the control value of each air conditioner, and FIG. 7 is a characteristic diagram showing the relationship between the total signal T ₂ for head temperature adjustment and the control value of each air conditioner. Is. 7 ... Blower, 8 ... Evaporator, 9 ... Heater core, 10
... air mix door, 13 ... vent outlet, 20 ... cold air bypass duct, 21 ... cold air bypass door, 33 ... microcomputer, 49 ... compressor, 51 ... electromagnetic clutch, 53 ... capacity variable device, 100 ... main overall signal computing means 10 ... Main control value calculation means, 140 ... Head general signal calculation means, 160 ... Head control value calculation means, 180 ... Control value determination means, 200 ... Control value selection means, 220 ... Air conditioner drive means, 300 ... Head temperature control signal calculation means, 310
... Control value calculation means.

Claims (4)

[Claims] 1. A cool air bypass for introducing temperature from a cooling means arranged in a main passage, a heating means and an air mix door to a passenger compartment while controlling the temperature, and for guiding the cooling air into a passenger compartment from a wake of the cooling means. In a vehicle air-conditioning control device having an opening adjustment means in a duct, a main total signal calculation means for calculating a main total signal corresponding to a heat load in a room based on at least an indoor temperature, an outside air temperature and a set temperature; Head total signal calculation means for calculating a head total signal corresponding to the heat load near the head of the occupant based on the temperature near the head, the set head temperature, and the amount of solar radiation, and each controlled by the main total signal A main control value calculating means for calculating a control value of the air conditioner; a head control value calculating means for calculating a control value of each air conditioner controlled by the head comprehensive signal; A control value of a part or all of each air conditioner as a calculation result by the means and one or a plurality of control values of each air conditioner as a calculation result by the head control value calculating means are compared to determine a control condition. Control value determining means, based on the determination result of the control value determining means, a control value selecting means for selecting either a control value based on the main integrated signal or a control value based on the head integrated signal; An air conditioning control device for a vehicle, comprising: an air conditioner drive means for controlling each air conditioner based on the control value selected by the selection means. 2. The vehicle air conditioning control device according to claim 1, wherein an air mix door is used as the control device to be compared in the control value determination means. 3. The vehicle air-conditioning control device according to claim 1, wherein the control value determining means uses a variable displacement compressor as a control device to be compared. 4. The vehicle air conditioning control device according to claim 1, wherein a blower is used as the control device to be compared in the control value determination means.