JP3611070B2 - Air conditioner for automobile - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air conditioner for automobiles in which an air conditioner control unit and a door actuator are connected to a local area network (hereinafter also referred to as LAN), and the opening degree of the door is controlled using a target door opening degree. The present invention relates to a LAN-equipped automobile air conditioner having an idling mechanism at a door.
[0002]
[Prior art]
In a conventional automobile air conditioner equipped with a microcomputer, an intake door, an air mix door, and a mode door are automatically opened and closed by an electric actuator based on a target opening signal calculated by the microcomputer. At that time, in order to feed back the actual opening degree of each door to the microcomputer, a rotation position signal of the electric actuator is transmitted to the microcomputer. In order to transmit and receive such control signals, it is necessary to electrically connect the microcomputer built in the air conditioner amplifier unit and the electric actuator attached to the air conditioner unit with several tens of harnesses. In addition, since the opening positions required for each of the intake door, the air mix door, and the mode door are also different from each other, the electric actuators are used in accordance with the respective doors and are used in common. I couldn't.
[0003]
For this reason, information communication between the air conditioner amplifier unit and the electric actuator is made into a local area network to reduce the number of harnesses as transmission media and to integrate the electric actuator.
[0004]
In this type of LAN-equipped automotive air conditioner, an IC chip constituting a signal processing circuit is mounted on an electric actuator, and data is transmitted and received between the IC chip and the microcomputer of the air conditioner amplifier unit. Because the feedback of the actual opening position of the door is self-processed by an electronic circuit including an IC chip in the electric actuator, the number of harnesses can be reduced and at the same time the opening position control according to each door in the electronic circuit Therefore, the electric actuator can be shared.
[0005]
[Problems to be solved by the invention]
By the way, in the full hot mode in which all of the intake air is led to the heater core, the water valve for circulating the engine coolant to the heater core is fully opened, but this open / close control can be controlled in conjunction with the air mix door. Has been done.
[0006]
For example, referring to FIG. 9, the lever 40 d of the actuator 40 rotates in the range of A to B to C, the position A is fully closed of the air mix door 33 and the water valve 32 a, and the position B is fully opened of the air mix door 33. The water valve 32a is half open and the position C corresponds to the water valve 32a being fully open. Then, when the link L is rotated by the lever 40d of the actuator 40, the air mix door 33 is rotated from the fully closed position to the fully open position according to the cam groove L1. At the same time, the opening / closing control of the water valve 32a is performed according to the other cam groove L2. That is, among the operation areas A to C of the actuator 40, the area B to C is a half-open to full-open control area of the water valve 32a, and the heating performance is further improved by increasing the circulation amount of the hot water to the heater core 32. be able to. In this region of B to C, the air mix door 33 maintains the fully open position as it is due to the shape of the cam groove L1, so that the region of B to C is the region of the air mix door 33. It is also called an empty region.
[0007]
In a conventional automotive air conditioner equipped with a microcomputer, this type of water valve 32a is controlled based on a detection signal of a potentiobalance register 40b (PBR, door opening detection sensor) built in the actuator 40. It was done. That is, in the PBR, the actuator lever 40d A to C is set as a detection area, and the actual position of the actuator lever 40d detected by the PBR is output to the microcomputer 50 at any time. The mix door 33 and the water valve 32a are controlled, and only the water valve 32a is controlled in the region of B to C.
[0008]
However, such an idling region is set to the fully open side of the air mix door 33 as shown in FIG. 9, and the fully closed side of the air mix door 33 as in the opening / closing control of the auxiliary door in the full cool mode. Sometimes it was set to. Further, in the right-hand drive vehicle and the left-hand drive vehicle, since the air conditioner units are mounted symmetrically on the vehicle, the operation direction of the actuator 40 may be symmetric. For this reason, two types of actuators are required, which not only increases the cost, but may cause incorrect assembly.
[0009]
An object of the present invention is to provide a LAN-equipped automobile air conditioner that can share an actuator by using a program software to deal with a difference in the position of an idling region.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, a target door opening determining means (51) for determining a target door opening determined by calculation and determination by a microcomputer by each sensor and each switch input,Air mix door ( 33 )The door opening degree detecting means (40b) for detecting the actual opening degree (X) and the target door opening degree data determined by the target door opening degree determining means are received and detected by the door opening degree detecting means. So that the actual door opening made matches the target door opening.Air mix door (33)In the automotive air conditioner (100) provided with the actuator (40) having the signal processing means (40c) for operating the vehicle, the detection region (Rpbr) in the door opening detection means and the target in the target door opening determination means The door opening setting area (Rx)Air mix doorThan the actual opening range (Rd) ofAt both endsWidely set,A water valve opening region (Rw) exists in a region beyond the actual opening region of the air mix door on the rotating side where the air mix door fully opens the front surface of the heater core (32), and the air The opening / closing control region (Rs) of the rectifying slave door exists in a region beyond the actual opening region of the air mixing door on the rotating side where the mixing door fully closes the front surface of the heater core,
The target door opening determining means (51) outputs an operation signal for controlling opening / closing of a water valve (32a) for controlling a circulation amount of hot water to the heater core in the water valve opening range. For opening / closing control of the slave door that rectifies the air bypassing the heater core in the opening / closing control region of the rectifying slave door.An automotive air conditioner is provided that outputs an operation signal to the signal processing means of the actuator.
[0011]
In this automobile air conditioner, the target door opening output from the target door opening determining means is self-processed in the actuator so that the actual door opening matches the target door opening. The actual door opening detection area and the target door opening setting area cannot be set narrower than the actual door opening area, but can be set wider.
[0012]
Based on this knowledge, the present inventors set at least one of the detection area in the door opening detection means and the setting area of the target door opening in the target door opening determination means more than the actual opening area of the door. While setting widely at one end, in the detection area exceeding the actual opening area of the door and the setting area of the target door opening, the actuated body other than the door is controlled.
[0013]
That is, in this air conditioner for automobiles, the door opening detection region (Rpbr) and the target door opening setting region (Rx) are operated with the actual opening region (Rd) of the door and the operated body other than the door. A region (Rw) is provided, and the target door opening degree data in the target door opening determination means is used as a region necessary for door opening / closing control.ActuatorBy allocating to the area necessary for the operation control, the so-called idle swing area is handled on the program software side of the target door opening determination means.
[0014]
Here, by setting the detection area in the door opening detection means and the setting area of the target door opening in the target door opening determination means wider at least at one end than the actual opening area of the door, the door Other thanActuatorIt is possible to secure an area where the operation can be controlled.
[0015]
Also, doors and doors other thanActuatorThe allocation of the target door opening to the above can be easily realized by the arithmetic processing of the program software of the target door opening determining means. Moreover, since such allocation is handled on the program software side, it is possible to set the idling area at any end of the operating area of the actuator by simply changing the program software. Can be used in common. In addition, since the actuated body other than the door can be controlled by one actuator, the cost can be reduced.
[0016]
Setting the detection area in the door opening detection means wider at one end than the actual opening area of the door can be easily realized, for example, by widening the resistance pattern range in the case of a potentiometer balance register. On the other hand, setting the target door opening setting area in the target door opening determining means wider at one end than the actual opening area of the door can be achieved by changing the program software of the target door opening determining means. It can be easily realized.
[0017]
Actuators in the present invention include all actuators used in automobile air conditioners, such as intake door actuators, air mix door actuators, mode door actuators, auxiliary door actuators such as bypass doors, etc. Is not limited.
[0018]
In the case of an intake door, bypass door, or mode door actuator, the door opening selected by the occupant is mainly used as the target door opening and sent to the actuator, and the door is operated after being compared with the actual opening. However, when the automatic control mode is selected, the target door opening for these actuators may be calculated and determined based on the temperature set by the occupant's selection and a predetermined program. .
[0019]
In the case of an air mix door actuator, although it is not limited, it is necessary to precisely control the door opening, and therefore it is assumed that the vehicle interior temperature is affected when the target door opening is determined. In consideration of the temperature influencing factor, it is preferable to first obtain a temperature deviation between the set temperature and the passenger compartment temperature and determine the target door opening based on this temperature deviation.
[0020]
In particular, according to the present invention, the door is an air mix door, and the detection area and the target door opening beyond the actual opening range of the air mix door are arranged on the rotating side where the air mix door fully opens the front surface of the heater core. There is a degree setting region (Rw), and in this region, a water valve for controlling the circulation amount of the hot water to the heater core is controlled to be opened and closed, and the present invention can be further embodied as an automotive air conditioner.
[0021]
In this automotive air conditioner, since the water valve opening / closing control region is provided on the rotation side where the air mix door fully opens the front surface of the heater core, when the control for fully opening the water valve is executed in the full hot mode, the heater core The amount of hot water flowing through the water increases, thereby further improving the heating performance. In addition, when the air mix door fully closes the front surface of the heater core, the water valve can be fully closed, and control can be performed so that hot water does not flow through the heater core. The air is not heated.
[0022]
Further, the present invention provides a detection area and a target beyond the actual opening area of the air mix door on the rotating side where the door is an air mix door and the air mix door fully closes the front surface of the heater core. There is a door opening setting region (Rs), and air that bypasses the heater core is rectified in the region.Slave doorIt can also be embodied as an automotive air conditioner characterized by controlling the opening and closing of the vehicle.
[0023]
In this automotive air conditioner, the air mix door is on the rotating side that fully closes the front surface of the heater core.Slave door for rectificationOpen / close control area is provided, so in full cool mode,Slave doorWhen the control to fully open is executed, the air that bypasses the heater core is rectified, the air volume of the conditioned air is increased, and the generation of noise is prevented.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a vehicle air conditioner of the present invention (corresponding to claims), FIG. 2 is a block diagram showing an embodiment of an air conditioner for automobile of the present invention, and FIG. FIG. 4 is a graph showing the relationship between the target door opening, the actual air mix door opening, and the actual water valve opening in the automotive air conditioner shown in FIG.
[0025]
First, the structure of the mechanical system of the automotive air conditioner 100 of this embodiment shown in FIGS. 2 and 3 will be described. As shown in FIG. 3, the automotive air conditioner 100 includes an intake unit 10, a cooler unit 20, and a heater unit 30, and includes an intake unit case 11, a cooler unit case 21, and a heater unit case 31, respectively. Connected in order.
[0026]
The intake unit case 11 is formed with an outside air inlet 12 for taking in air outside the passenger compartment and an inside air inlet 13 for circulating indoor air. The inside air inlet 13 is directly formed in the intake unit case 11, but the outside air inlet 12 is communicated with an inlet formed in the cowl panel of the vehicle body via an air duct.
[0027]
The intake unit case 11 is provided with an intake door 16D so as to be rotatable, and a position where the outside air intake 12 is fully closed (inside air circulation mode) and a position where the inside air intake 13 is fully closed (outside air intake mode). , And if necessary, stop at the intermediate position (inside / outside air intake mode). The rotation of the intake door 16D is performed by an intake door actuator 41 that is also attached to the intake unit case 11.
[0028]
The intake of inside air and / or outside air is performed by the fan 15 rotated by the fan motor 14, and the fan motor 14 is controlled via the fan control circuit 45 based on the operation signal transmitted from the air conditioner amplifier unit 50.
[0029]
The cooler unit case 21 is provided with an evaporator (condenser) 22 for cooling the intake air. The evaporator 22 serves as a refrigerant for the compressor, condenser (evaporator), expansion valve, liquid tank, and the like. It becomes an element of a cooling cycle configured by connecting with piping. The cooling cycle is operated and stopped by an air conditioner switch of a control panel 70 provided on an instrument panel in the passenger compartment. In the present invention, the cooler unit 20 may be omitted.
[0030]
The heater unit 30 has a function of adjusting the temperature of the air that has passed through the intake unit 10 and the cooler unit 20 and distributing conditioned air from a desired air outlet to the vehicle interior. For this purpose, the heater unit case 31 is provided with the heater core 32 so as to form a bypass path 37, and the amount of air passing through the heater core 32 and the bypass path 37 by the air mix door 33 provided in front of the heater core 32. The ratio of the amount of air passing through is adjusted.
[0031]
Note that engine coolant of the vehicle circulates in the heater core 32, and the air is heated by heat exchange between the engine coolant and air. In order to guide the engine coolant to the heater core 32, a water valve 32a is provided to be openable and closable. The water valve 32a not only simply turns on / off the circulation of engine cooling water, but also when the air mix door 33 is in the fully open position, the water valve 32a is further fully opened to circulate the hot water to the heater core 32. Thereby increasing the heating performance. On the other hand, when the air mix door 33 is in the fully closed position, the water valve 32a is fully closed to stop the supply of hot water to the heater core 32, so that the air flowing into the air mix chamber 39 is heated. There is also a function of preventing an unexpected temperature rise due to contact with the back surface of 32.
[0032]
On the other hand, the air mix door 33 is rotated by the air mix door actuator 43 between a position where the front surface of the heater core 32 is fully closed (full cool) and a position where the bypass path 37 is fully closed (full hot).
[0033]
The air mix door 33 and the water valve 32 a are controlled by the same air mix door actuator 43. That is, for example, as shown in FIG. 9, when the link L is interposed between the air mix door actuator 43, the air mix door 33, and the water valve 32a, and the air mix door actuator 43 rotates only the link L. The air mix door 33 and the water valve 32a operate in conjunction with the cam grooves L1 and L2. In addition, the specific structure of these interlocking mechanisms is not specifically limited.
[0034]
An air mix chamber 39 is formed on the downstream side of the heater unit case 31, and a vent outlet 34, a defrost outlet 35 and a foot outlet 36 are formed therein. The vent outlet 34 communicates with a vent grill provided on the front surface of the instrument panel in the passenger compartment via an air duct, and blows conditioned air mainly toward the upper body of the occupant. The defrost outlet 35 communicates with a defrost grill provided on the upper surface of the instrument panel via an air duct, and blows out low-humidity air or warm air toward the inner surface of the windshield to clear the cloudiness. The foot outlet 36 opens from the heater unit case 31 directly or via a short air duct at the feet of the passengers in the passenger compartment, and mainly blows warm air toward the feet of the passengers.
[0035]
In addition, a vent door 34D, a differential door 35D, and a foot door 36D are provided at the air outlets 34, 35, and 36, respectively, so that the air outlets can be opened and closed. Via the mode door actuator 44. That is, these doors operate according to combinations of opening and closing of the three doors 34D, 35D, and 36D by selecting various blowing modes such as a vent mode, a defrost mode, a bi-level mode, and a foot mode. For example, in the bi-level mode, the vent air outlet and the foot air outlet are each half open, cold air is blown out from the vent air outlet, and warm air is blown out from the foot air outlet, so that the so-called cold head heat type temperature control is performed.
[0036]
In the automotive air conditioner 100 of the present embodiment, a second bypass path 38 is formed in the heater unit case 31, and a bypass door 38D that fully closes and fully opens the second bypass path 38 is further provided. The bypass door 38D is operated by the bypass door actuator 42. When the air mix door 33 is rotated to the fully open position of the heater core 32 to guide the warm air to the foot outlet 36, the bypass door 38D is fully opened. The cool air is guided to the vent outlet, thereby increasing the temperature difference in the head cold foot heat type temperature control. In the present invention, the second bypass path 38 and the bypass door 38D may be omitted, or may be used as a rectifying slave door of another embodiment described with reference to FIGS.
[0037]
Next, the configuration of the control system of the automotive air conditioner 100 of the present embodiment will be described. As shown in FIG. 3, the automotive air conditioner 100 of the present embodiment includes an air conditioner amplifier unit 50, various sensors 61 to 66, and a control panel 70.
[0038]
The air conditioner amplifier unit 50 has a built-in microcomputer, and performs arithmetic processing on input signals from various sensors 61 to 66, which will be described later, and switches of the control panel 70 in accordance with program software, and the fan motor 14 and the door actuators 41 to 44. , And the compressor etc. outside the figure are comprehensively controlled. Although details will be described later, the target door opening degree determining means 51 according to the present invention shown in FIG. 1, the vehicle interior air temperature estimating means 53, and the temperature deviation calculating means 54 shown in FIG. Specifically, it is composed of a CPU, ROM and RAM of a microcomputer.
[0039]
Among the sensors, the water temperature sensor 61 is a sensor that detects the temperature of the engine cooling water, is provided in the engine cooling water circuit, converts the water temperature into a resistance value, and outputs the resistance value to the air conditioner amplifier unit 50.
[0040]
The refrigerant temperature sensor 62 is a sensor that detects the temperature of the refrigerant circulating in the cooling cycle. For example, the refrigerant temperature sensor 62 is attached to the inlet side of the evaporator 22, converts the refrigerant temperature into a resistance value, and outputs the resistance value to the air conditioner amplifier unit 50.
[0041]
The inside air sensor 63 is a sensor that detects an actual air temperature in the vehicle interior. For example, the inside air sensor 63 is provided on the front surface of the instrument panel, converts the room temperature Tinc into a resistance value, and outputs the resistance value to the air conditioner amplifier unit 50.
[0042]
The outside air sensor 64 is a sensor that detects an actual air temperature outside the passenger compartment. For example, the outside air sensor 64 is provided in a hood lock stay, converts the outside air temperature Tam into a resistance value, and outputs the resistance value to the air conditioner amplifier unit 50.
[0043]
The solar radiation sensor 65 is a sensor that detects the amount of solar radiation Qsun entering the room from the windshield with a photodiode and outputs it as a current value to the air conditioner amplifier unit 50. For example, the solar radiation sensor 65 is provided on the upper surface of the instrument panel.
[0044]
The suction temperature sensor 66 is a sensor that detects the air temperature after passing through the evaporator 22, is provided in the cooler unit 20, converts the suction temperature Tint into a resistance value, and outputs the resistance value to the air conditioner amplifier unit 50.
[0045]
In addition, the signal by the resistance value or electric current value output from each of these sensors 61 to 66 to the air conditioner amplifier unit 50 is converted into a voltage value by the air conditioner amplifier unit 50 and input.
[0046]
The control panel 70 is mounted in the center of an instrument panel that is easy for the passenger to operate, and includes various switches 71 such as a fan switch, a balance control lever (or dial), a blowing mode switch, an air conditioner switch, and a forced air circulation switch, and a fan. A display panel 72 for displaying speed, temperature, and the like, and a communication interface 73 for performing data communication with the air conditioner amplifier unit 50 are provided. In the automotive air conditioner of the present invention shown in FIG. 1, the door opening setting means 71 corresponds to, for example, a balance control lever, a blow mode switch, or a forced air circulation switch.
[0047]
As shown in FIG. 1, the door actuator 40 (41 to 44) described above includes a motor 40 a for mechanically opening and closing the door, and a door opening degree that is detected by converting the door opening degree to a voltage value. In addition to the sensor (door opening detection means) 40b, a signal processing circuit 40c composed of an IC chip or the like is provided. When the target door opening Xpbr is determined by the air conditioner amplifier unit 50, the data on the target door opening is received by the signal processing circuit 40c and detected by the door opening sensor 40b by the signal processing circuit 40c. A current is supplied to the motor 40a so that the actual door opening X matches the target door opening.
[0048]
In particular, in the present embodiment, the detection region Rpbr in the door opening sensor 40b is set wider on the fully open side than the actual opening region Rd of the door, as shown in FIG. The resistance pattern of the potentiobalance resistor PBR is formed wider than the door rotation region Rd. A region Rw beyond the door rotation region Rd is an open / close control region of the water valve 32a.
[0049]
The door opening sensor 40b is composed of a PBR (potential balance register) built in the door actuator 40, but may be composed of other encoders.
[0050]
Furthermore, in the automotive air conditioner 100 of the present embodiment, as shown in FIG. 2, as the control element of the air mix door 33, the air conditioner amplifier unit 50 estimates the air temperature in the passenger compartment in consideration of the temperature influence factor. Vehicle interior air temperature estimating means 53, temperature deviation calculating means 54 for obtaining a deviation S between the set temperature Tptc set by the balance control lever 71 and the vehicle interior air temperature estimated by the vehicle interior air temperature estimating means 53, Based on the temperature deviation S obtained by the temperature deviation calculating means 54, it is determined which direction the operation direction of the air mix door 33 is, and the target is obtained by adding or subtracting a certain opening to the previous target door opening. Target door opening degree determining means 51 for determining the door opening degree is provided. These are all composed of electronic parts such as a microcomputer CPU, ROM and RAM.
[0051]
When the vehicle interior temperature Tptc is set by the occupant's selection with the balance control lever 71, the vehicle interior air temperature estimation means 53 estimates the air temperature in the vehicle interior in consideration of the temperature influence factor. The temperature-influencing elements referred to here are elements that may affect the air temperature in the passenger compartment, such as the inside air temperature, the outside air temperature, the amount of solar radiation, and the intake temperature, and specifically, the inside air sensor 63 and the outside air sensor 64. The inside air temperature Tinc, the outside air temperature Tam, the solar radiation amount Qsun, and the suction temperature Tint detected by the solar radiation sensor 65 and the suction temperature sensor 66 are used.
[0052]
The temperature deviation calculating means 54 obtains a deviation S between the set temperature Tptc and the vehicle interior air temperature, and this temperature deviation S means the degree of deviation of the vehicle interior air temperature with respect to the set temperature. Is an operation target, it is calculated by a thermal equilibrium equation using the set temperature Tptc, the outside air temperature Tam, the inside air temperature Tinc, the suction temperature Tint, and the solar radiation amount Qsun. The thermal equilibrium formula is given by, for example, the following formula, but is not particularly limited in the present invention.
[0053]
[Expression 1]
S = (A + D) Tptc + (B.Tam-D.Tinc) + C.Qsun + E + .alpha.Xm- (F.X + G) (88-Tint) -Tint
Here, A, B, C, D, E, F, and G are coefficients, Tptc is the set temperature, Tam is the outside air temperature, Tinc is the inside air temperature, Qsun is the amount of solar radiation, and αXm is a deviation determined according to the blowing mode. The correction value, X represents the door opening, and Tint represents the suction temperature.
[0054]
Based on this temperature deviation S, the target door opening determination means 51 determines which direction the air mix door 33 is operating, and adds or subtracts a certain opening to the previous target door opening. The target door opening is determined, and this target door opening is transmitted to the actuator 43.
[0055]
Particularly in the present embodiment, the target door opening setting region Rx in the target door opening determining means 51 is set wider on the fully opened side than the actual opening region Rd of the door, as shown in FIG. It is. In other words, the air mix door 33 actually rotates only within the Rd region, but the target door opening data Xpbr output from the target door opening determining means 51 is on the fully open side of this region Rd. The region Rx to which the water valve opening region Rw is added is the target. The opening range Ra of the lever of the actuator 43 is also in the same range.
[0056]
Therefore, as shown in FIG. 4, for example, when full shut (Xpbr = 0%) of the air mix door 33 is output, the air mix door 33 mechanically fully closes the heater core 32 (actual air mix door opening = 0%). ), But when full open (Xpbr = 100%) is output, before that, for example, Xpbr = 67%, the air mix door 33 is fully open (air mix door actual opening = 100%). Between Xpbr = 67% and 100%, the air mix door 33 maintains the fully open position as it is due to the idle shape of the cam groove L1 shown in FIG. Instead, since the lever of the actuator 43 is rotated even when Xpbr = 67% to 100%, the water valve 32a is controlled to be half open to fully open via the link L.
[0057]
The communication format communicated between the air conditioner amplifier unit 50 and the actuator includes, for example, an area F1 in which a code indicating the start of transmission is written in a 16-bit data area, and an address of a door actuator to be transmitted. A region F2, a region F3 in which a door actuator operation command (permitted or prohibited) is written, a region F4 in which a target stop position of the door actuator is written, a region F5 in which odd parity for information in F2 to F4 is written, and It is assigned to a region F6 where a diagnostic door actuator return signal is written. Of these, the area for writing the return signal of the door actuator has, for example, a data length of only 1 bit, a high level signal output while the door actuator is in operation, and a low level signal output when the door actuator is stopped. Is written. In addition, although the action | operation and stop of the door actuator were identified by the high level and the low level, it is also possible to reverse this.
[0058]
Next, the operation will be described.
FIG. 5 is a flowchart showing an information processing procedure executed by the air conditioner amplifier unit 50 shown in FIG. Hereinafter, the control of the air mix door 33 will be described as an example.
[0059]
When the air conditioner switch is input, automatic control of the air mix door 33 is started. First, in step 10, information necessary for opening control of the air mix door 33 is input from the various sensors 61 to 66 and the control panel 70. In parallel with this, the coefficients A to G used in the thermal equilibrium equation are determined in Step 20. Strictly speaking, the coefficients F and G are determined in the next step 30.
[0060]
Next, in step 30, the temperature deviation S is obtained using the above thermal equilibrium equation. In calculating the temperature deviation S, first, the combined temperature W is calculated from the outside air temperature Tam, the inside air temperature Tinc, and the coefficients B and D. W = B · Tam + D · Tinc is calculated. Next, the door opening X is obtained by calculation from the target door opening Xpbr obtained in the previous calculation process, and the deviation correction value αXm is determined according to the selected blowing mode. Further, the coefficients F and G are determined by the door opening X and the blowing mode (bent, differential, bilevel 2 mode or other modes).
[0061]
Finally, the value obtained in this way is substituted into the above-described thermal balance equation, and the temperature deviation S between the set temperature and the room temperature is calculated.
[0062]
In step 40, the set temperature Tptc in the control panel 70 is a full cool range of less than 18.5 ° C, a full hot range of over 31.5 ° C, or a temperature control range of 18.5 ° C or higher and 31.5 ° C or lower. Is judged. In this case, the boundary temperatures of 18.5 ° C. and 31.5 ° C. are merely examples, and are not particularly limited.
[0063]
When the set temperature Tptc is in the full cool range below 18.5 ° C., the target door opening is set to Xpbr = 0%, and the air mix door 33 is rotated to the heater core fully closed position (step 64). ).
[0064]
On the other hand, when the set temperature Tptc is a full hot range exceeding 31.5 ° C., the target door opening is set to Xpbr = 100%, and the air mix door 33 is rotated to the heater core fully open position ( Step 65). When Xpbr = 100% is output, as shown in FIGS. 1 and 4, the air mix door 33 rotates to the fully open position and the water valve 32 a also rotates from half open to fully open, and the engine in the heater core 32. Cooling water circulation is maximized.
[0065]
When the set temperature Tptc is in the temperature adjustment range of 18.5 ° C. or more and 31.5 ° C. or less in step 40, the absolute value | S | of the temperature deviation S calculated in the next step 50 If the absolute value | S | of the temperature deviation is 2 or less, the routine proceeds to step 61 where the target door opening Xpbr is the same as the previous target door opening, that is, Xpbr. = Xpbr + 0%.
[0066]
In step 50, if the temperature deviation S is less than -2, the process proceeds to step 52. First, it is determined whether the previous target door opening is 0%, that is, whether the air mix door 33 is fully closed. If it is 0%, the routine proceeds to step 61 where the target door opening Xpbr is set to the same value as the previous target door opening, that is, Xpbr = Xpbr + 0%. If the previous target door opening is not 0% in step 52, the process proceeds to the next step 53 to determine whether the previous target door opening is 100%, that is, whether the air mix door 33 is fully open. To do. If the previous target door opening is 100%, the target door opening is replaced with Xpbr = 67% in step 54. As a result, as shown in FIG. 4, the air mix door 33 is fully opened and only the water valve 32a is controlled from full open to half open, and as a result, the full hot mode is released. Thereafter, at step 62, the target door opening Xpbr is reduced by 1% from the previous time, that is, Xpbr = Xpbr-1%, and the normal temperature adjustment mode is set. If the previous target door opening is not 100%, the process skips step 54 and proceeds to step 62. Similarly, the target door opening Xpbr is reduced by 1% from the previous time, that is, Xpbr = Xpbr-1%. Is done.
[0067]
On the other hand, if the temperature deviation S is larger than 2 in step 50, the process proceeds to step 51, where it is determined whether or not the previous target door opening is larger than 66%, and if it is larger, the process proceeds to step 65. , Xpbr = 100%, the air mix door 33 is rotated to the heater core fully open position, and the water valve 32a is also rotated from the half open position to the fully open position to maximize the circulation amount of the engine coolant in the heater core 32. In step 51, if the previous target door opening is smaller than 66%, the process proceeds to step 63, where the target door opening Xpbr is increased by 1% from the previous time, that is, Xpbr = Xpbr + 1%.
[0068]
Thus, according to the air conditioner for automobiles of the present embodiment, the idling region can be freely set only by configuring the program software of the air conditioner amplifier 50 using the same actuator.
[0069]
The present invention can be further modified. FIG. 6 is a system diagram showing a main part of another embodiment of the automotive air conditioner of the present invention, and FIG. 7 shows the target door opening, the air mix door actual opening, and the slave door actual opening in the embodiment. FIG. 8 is a flowchart showing an information processing procedure executed by the air conditioner amplifier unit of the embodiment.
[0070]
In the automotive air conditioner 100 of the present embodiment, an idle swing region is provided on the fully closed side of the air mix door 33. That is, as shown in FIG. 7, among the target door opening Xpbr = 0 to 100% output from the target door opening determining means 51, Xpbr = 0 to 33% is the opening / closing control region Rs of the rectifying slave door. Xpbr = 34 to 100% is set as the actual opening / closing control region Rd of the air mix door 33. Here, the rectifying slave door is a control door provided to reduce the ventilation resistance when passing through the bypass passage 37 in the full cool mode, for example, and in addition to the increase in the air volume due to the reduction of the ventilation resistance, the noise It also has a reduction function. Then, as the air mix door 33 is fully closed, the rectifying slave door is rotated so as to exert its function.
[0071]
In the case of such a configuration, in FIG. 8, steps 10 to 40 operate in the same manner as in the above-described embodiment. When the set temperature Tptc is in the temperature adjustment range of 18.5 ° C. or more and 31.5 ° C. or less in step 40, the absolute value | S | of the temperature deviation S calculated in the next step 50 If the absolute value | S | of the temperature deviation is 2 or less, the routine proceeds to step 61 where the target door opening Xpbr is the same as the previous target door opening, that is, Xpbr. = Xpbr + 0%.
[0072]
In step 50, if the temperature deviation S is 2 or more, the process proceeds to step 51, where it is first determined whether the previous target door opening is 100%, that is, whether the air mix door 33 is fully open, When it is 100%, the routine proceeds to step 65, where the target door opening Xpbr is set to the same value as the previous target door opening, that is, Xpbr = Xpbr + 0%. If the previous target door opening is not 100% in step 51, the process proceeds to the next step 53 to check whether the previous target door opening is 0%, that is, whether the air mix door 33 is fully closed. to decide. If the previous target door opening is 0%, the target door opening is replaced with Xpbr = 33% in step 54. As a result, as shown in FIG. 7, the air mix door 33 is fully closed and only the rectifying slave door is controlled from fully open to fully closed. As a result, the full cool mode is released. Thereafter, at step 63, the target door opening Xpbr is increased by 1% from the previous time, that is, Xpbr = Xpbr + 1%, and the normal temperature adjustment mode is set. If the previous target door opening is not 0%, step 54 is skipped and the routine proceeds to step 62 where the target door opening Xpbr is also increased by 1% from the previous time, that is, Xpbr = Xpbr + 1%. .
[0073]
On the other hand, if the temperature deviation S is less than -2 in step 50, the process proceeds to step 52, where it is determined whether or not the previous target door opening is smaller than 34%. Then, Xpbr = 0%, the air mix door 33 is rotated to the heater core fully closed position, and the rectifying slave door is also fully opened. In step 51, when the previous target door opening degree is 34% or more, the routine proceeds to step 62, where the target door opening degree Xpbr is reduced by 1% from the previous time, that is, Xpbr = Xpbr-1%.
[0074]
As described above, also with the automobile air conditioner of the present embodiment, it is possible to freely set the idling region simply by configuring the program software of the air conditioner amplifier 50 using the same actuator.
[0075]
The embodiment described above is described for facilitating the understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.
[0076]
For example, the idle swing region is not limited to the air mix door 33 and can be applied to other control doors. Further, the idle swing region can be provided not only at one end of the door but also at both ends. Furthermore, the control flow of the air mix door 33 can be controlled by a method other than the embodiment described above.
[0077]
【The invention's effect】
As described above, according to the present invention, an actuator other than the door can be controlled by a single actuator, and the actuator can be shared, so that the cost can be reduced. Incorrect assembly can be prevented.
[Brief description of the drawings]
FIG. 1 is a block diagram (claim correspondence diagram) showing an air conditioner for an automobile of the present invention.
FIG. 2 is a block diagram showing an embodiment of an automotive air conditioner of the present invention.
FIG. 3 is a system diagram of the automobile air conditioner shown in FIG. 2;
4 is a graph showing the relationship between a target door opening, an air mix door actual opening, and a water valve actual opening in the automobile air conditioner shown in FIG. 2;
FIG. 5 is a flowchart showing an information processing procedure executed by the air conditioner amplifier unit shown in FIG. 2;
FIG. 6 is a system diagram showing a main part of another embodiment of the automotive air conditioner of the present invention.
7 is a graph showing a relationship between a target door opening, an air mix door actual opening, and a slave door actual opening in the automobile air conditioner shown in FIG. 6;
FIG. 8 is a flowchart showing an information processing procedure executed by the air conditioner amplifier unit shown in FIG. 6;
FIG. 9 is a system diagram for explaining an interlock mechanism of an air mix door and a water valve in a conventional automobile air conditioner.
[Explanation of symbols]
100 ... Air conditioner for automobile
10 ... Intake unit
16D ... Intake door
20 ... Cooler unit
30 ... Heater unit
32 ... Heater core
32a ... Water valve
33 ... Air mix door
34D ... Bent door
35D ... defrost door
36D ... foot door
38D ... Bypass door
40 ... Door actuator
40a ... motor
40b ... Door opening sensor
40c: Signal processing means
50 ... Air conditioner amplifier unit
51. Target door opening determination means
60: Sensors
70 ... Control panel
71: Door opening setting means
72. Display means

Claims (1)

A target door opening determining means (51) for determining a target door opening determined by calculation and determination by a microcomputer by each sensor and each switch input;
Door opening degree detecting means (40b) for detecting the actual opening degree (X) of the air mix door ( 33 ) ;
Data of the target door opening determined by the target door opening determining means is received, and the air mix door so that the actual door opening detected by the door opening detecting means coincides with the target door opening In the automotive air conditioner (100) including the actuator (40) having the signal processing means (40c ) for operating (33) ,
The target door opening of the set area in the door opening detection area of the detection means (Rpbr) and the target door opening determining means (Rx) is than the actual opening area (Rd) of the air mix door, the is Oite widely set at both ends,
A water valve opening region (Rw) exists in a region beyond the actual opening region of the air mix door on the rotating side where the air mix door fully opens the front surface of the heater core (32),
An opening / closing control region (Rs) for the rectifying slave door exists in a region beyond the actual opening region of the air mix door on the rotating side where the air mix door fully closes the front surface of the heater core,
The target door opening determining means (51)
In the water valve opening range, an operation signal for controlling the opening and closing of the water valve (32a) for controlling the circulation amount of the hot water to the heater core is output to the signal processing means of the actuator,
An air conditioner for an automobile that outputs, to the signal processing means of the actuator, an operation signal for controlling the opening and closing of the slave door that rectifies the air that bypasses the heater core in the opening and closing control region of the rectifying slave door .

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