JP4257046B2 - Air conditioner for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle air conditioner, and more particularly to a vehicle air conditioner that can write data including calculation coefficient data and correction data that determine air conditioning characteristics of the vehicle air conditioner.
[0002]
[Prior art]
In a vehicle air conditioner, the target air temperature, the amount of air blown out to the passenger compartment, etc. are set cabin temperature, passenger compartment air temperature (hereinafter also referred to as “inside air temperature”), and passenger compartment outside air temperature (hereinafter referred to as “outside air temperature”). ), The air quantity in the vehicle interior is obtained by blowing out the air at the obtained blowing temperature from the blowing duct by the calculated blowing quantity by a predetermined calculation based on the amount of solar radiation and others.
[0003]
At this time, the calculation coefficient data and the correction data in the arithmetic expression used for air conditioning determined in advance are air conditioning data for determining the air conditioning characteristics of the vehicle air conditioning apparatus, and are used for air conditioning. It is determined by the performance of the heater, the performance of the cooler, the performance of the blower, the effective cross-sectional area of the air-conditioning duct, the shape and piping route, the effective cross-sectional area of the air-conditioning air blowing duct, the shape and piping route, the characteristics of the damper, etc. These calculation coefficient data and correction data are stored in advance in a mask ROM provided in a microcomputer that is a control device constituting a part of the air conditioner.
[0004]
The calculation coefficient data and correction data stored in the mask ROM are referred to, based on the calculated calculation coefficient data and correction data, the set cabin temperature, the detected inside air temperature, the detected outside air temperature, the detected solar radiation amount, etc. By calculating based on a predetermined calculation formula, the temperature of the air blown out to the passenger compartment, the amount of air blown out, etc. are obtained. Air conditioning in the room.
[0005]
However, there are cases where a predetermined air-conditioning characteristic cannot be obtained due to a change in the vehicle type or a change in the design of the vehicle. Specifically, the characteristics of the heater for air conditioning, the characteristics of the cooler, the characteristics of the blower, the effective cross-sectional area of the air-conditioning duct, the shape and the piping path, the effective cross-sectional area of the air-conditioning air blowing duct, the shape and the The piping route or the like is changed, and as a result of these changes, the passenger compartment air temperature after air conditioning may be felt high or low, and a desired comfort may not be provided.
[0006]
In such a case, it is necessary to update data including calculation coefficient data and correction data written in the mask ROM during the development period and the manufacturing process.
[0007]
[Problems to be solved by the invention]
However, in order to rewrite the data stored in the mask ROM after manufacturing the mask ROM, a semiconductor manufacturer also needs a period of several weeks, and data including calculation coefficient data and correction data stored in the mask ROM. It may be difficult to adapt the renewal of the vehicle to the mass production time of the vehicle.
[0008]
It is an object of the present invention to provide a vehicle air conditioner that can easily write and update data including calculation coefficient data and correction data.
[0009]
[Means for Solving the Problems]
A vehicle air conditioner according to the present invention is a vehicle air conditioner including a control device including a computer for controlling a vehicle air conditioner main body and performing air conditioning control of a passenger compartment.
EEPROM for storing data including calculation coefficient data and correction data for determining air conditioning characteristics;
Instruction means for instructing writing of data to the EEPROM;
Determining means for determining that a signal sent from an EEPROM writer connected to the computer via a communication port is a predetermined signal;
When receiving the instruction by the instruction means and the determination output by the determination means that the signal is a predetermined signal, the data including the calculation coefficient data and the correction data for determining the air-conditioning characteristics sent from the EEPROM writer is subsequently received. Writing means for writing to the EEPROM;
It is provided with.
[0010]
According to the air conditioning apparatus for a vehicle of the present invention, the writing of data to the EEPROM is instructed by the instruction means, and the signal sent from the EEPROM writer connected to the computer via the communication port is a predetermined signal. When it is determined by the determining means that the data including the calculation coefficient data and the correction data for determining the air conditioning characteristics that are subsequently sent from the EEPROM writer is written to the EEPROM by the writing means, the air conditioning characteristics The data including the calculation coefficient data and the correction data for determining the error is not permitted to be input by mistake due to an erroneous operation, and is not written in the EEPROM.
[0011]
Furthermore, according to the vehicle air conditioner of the present invention, data including calculation coefficient data and correction data for determining air conditioning characteristics is written to the EEPROM, so that data can be written to the EEPROM and data stored in the EEPROM can be rewritten. Easy, air conditioner heater characteristics, cooler characteristics, blower characteristics, air-conditioning duct effective cross-sectional area, shape and piping route, air-conditioning air outlet duct effective cross-sectional area, shape and piping route, etc. It is possible to easily cope with a change in the vehicle type including the change of the vehicle and a design change of the vehicle.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Embodiments of a vehicle air conditioner according to the present invention will be described.
[0013]
FIG. 1 is a schematic configuration explanatory diagram of a vehicle air conditioner according to an embodiment of the present invention.
[0014]
Reference numeral 1 denotes a vehicle air conditioner according to an embodiment of the present invention. The vehicle air conditioner 1 includes a vehicle air conditioner body 2 and a microcomputer, and controls the vehicle air conditioner body 2. Then, an operation / display panel 7 having a control device 5 that performs air conditioning control of the passenger compartment and an indicator that displays an air conditioning control status together with an operation switch that gives an instruction to the control device 5 is provided.
[0015]
As already known, the vehicle air conditioner main body 2 is provided in the air-conditioning duct 12 so as to be rotatable from the upstream side to the downstream side so as to make the intake air into the vehicle interior air or outside air. Intake damper 14 for selecting whether or not to use the mixture, blower 16 for blowing air sucked through intake damper 14 to vehicle compartment 48, and cooling circuit 31 described later exchange heat with the blown air during operation Cooler 30 including evaporator 18, mix damper 20 that controls the amount of air to be diverted to heater 22 that circulates the cooling water of the onboard internal combustion engine in the air that has passed through evaporator 18, and heats the passing air, and vehicle interior 48 There is provided a mode switching damper 24 for selecting an air outlet to the air.
[0016]
The air outlet to the passenger compartment 48 is a vent outlet 24-1, which blows out air toward the face of the occupant, a foot outlet 24-2, which blows out air from the feet, and a defrost outlet, which blows out along the windshield (see FIG. (Not shown), and one or two of the outlets are selected by the mode switching damper 24.
[0017]
The microcomputer constituting the control device 5 basically includes a CPU 52, a ROM 54 storing a program for air conditioning in cooperation with the CPU 52, a work area for air conditioning, and calculation data and calculation result data. RAM 56 for temporarily storing data, EEPROM 58 for storing data including calculation coefficient data and correction data, timer 60, analog multiplexer 62, A / D converter 64 for A / D converting the output of analog multiplexer 62, data writing The EEPROM writer 68 for writing data including calculation coefficient data and correction data to the EEPROM 58 can be connected to the CPU 52 via the communication port 69. A RAM monitor can be connected to the CPU 52 via the communication port 69.
[0018]
Here, the EEPROM writer 68 is basically composed of a computer and sends out the data shown in FIG. This data is written to address data that designates an address in the EEPROM 58 to which data for determining air conditioning characteristics including read / write instruction data (R / W), calculation coefficient data and correction data is written, and to an address designated by the address data. Data for determining air conditioning characteristics including calculation coefficient data and correction data, data indicating the number of data constituting one packet, and sum check data.
[0019]
As shown in FIG. 3, the microcomputer constituting the control device 5 is sent from an automatic air conditioner control circuit 5-1 that performs air conditioning control of the passenger compartment and an EEPROM writer 68 connected to the CPU 52 via a communication port 69. A determination circuit 5-2 for determining that the received signal is a predetermined signal, a write instruction by the dip switch 66, and a determination output for determining that the signal is a predetermined signal by the determination circuit 5-2. A detection circuit 5-3 for detecting, and a data writing circuit 5 for writing, in the EEPROM 58, data including calculation coefficient data and correction data for determining air conditioning characteristics sent from the EEPROM writer 68 following detection by the detection circuit 5-3. -4 functionally.
[0020]
In the data writing circuit 5-4, a predetermined amount of data, that is, data for the number of frames constituting one packet is temporarily stored in the RAM 56, and then an operation for determining air conditioning characteristics in the data stored in the RAM 56 is performed. A function of writing data including coefficient data and correction data to the address of the EEPROM 58 based on the address data included in the data transmitted from the EEPROM writer 68 is functionally provided.
[0021]
Further, the data writing circuit 5-4 has a function of writing a predetermined amount of data, that is, data constituting one packet to the EEPROM 58, and sending the written data to the EEPROM writer 68 for data check. Functionally equipped.
[0022]
On the other hand, the operation / display panel 7 is provided at the lower part of the instrument panel of the vehicle.
[0023]
The operation / display panel 7 includes an AUTO instruction switch 72 for instructing the start of an automatic air conditioner, an OFF instruction switch 74 for instructing an automatic air conditioner stop, a temperature increase instruction switch 76 for instructing an increase in the set cabin temperature, A temperature lowering instruction switch 78 for instructing to lower the set temperature, a display unit 80, a blowing mode instruction switch 92 for manually instructing blowing mode switching, an air volume instruction switch 94 for manually instructing air volume switching, a defrost instruction switch 98, and an inside / outside air switching instruction A switch 100 is provided, and the output of each instruction switch is supplied to the control device 5, and corresponding control is performed under the control of the control device 5.
[0024]
That is, the automatic air conditioner is activated by an instruction from the AUTO instruction switch 72, the automatic air conditioner is stopped by an instruction from the OFF instruction switch 74, and the set cabin is instructed by an instruction from the temperature rise instruction switch 76 which instructs to raise the set cabin temperature An instruction to raise the temperature is given to designate the set cabin temperature, an instruction to lower the set cabin temperature is given by the instruction of the temperature lowering instruction switch 78, the set cabin temperature is designated, and based on the instruction of the blowing mode instruction switch 92 Control of the mode switching damper 24 selects air delivery from the instructed air outlet, and the air volume is switched by switching the voltage applied to the blower 16 according to the instruction of the air volume instruction switch 94, and according to the instruction of the defrost instruction switch 98. Based on the instruction of the inside / outside air switching instruction switch 100, defrosting is performed. Recirculated air or outside air capture is selected in the intake damper 14.
[0025]
The display unit 80 includes a set passenger compartment temperature display unit 82, a blowing mode display unit 84, an air volume display unit 86, a status display unit 88 of the heater 22, and a time display unit 90. Based on instructions from the control device 5, Each of the set cabin temperature, the blowing mode, the air volume, the state of the heater 22 and the current time is displayed.
[0026]
On the other hand, an inside air temperature sensor 36 that detects the air temperature inside the vehicle interior, an outside air temperature sensor 38 that detects the outside air temperature inside the vehicle interior, an evaporator air temperature sensor 40 that detects the evaporator outlet air temperature, and a heater that detects the temperature of the heater 22. The outputs A to F of the temperature sensor 42, the solar radiation sensor 44 that detects the solar radiation amount, and the potentiometer 46 that detects the mix damper opening degree are supplied to the control device 5.
[0027]
In the control device 5 that has received these outputs A to F, the anagromultiplexer 62 sequentially selects one of the inputs to the anagromultiplexer 62, and the selected input is A / D converted by the A / D converter 64. Based on the A / D conversion output, when the automatic air conditioner instruction is given, the operation / display panel is under the control of the automatic air conditioner control circuit 5-1, and when the automatic air conditioner stop instruction is given. 7, the position of the intake damper 14 is controlled by the output of the drive circuit 26 including the actuator, and the rotation of the blower 16 is controlled by the output of the drive circuit 28, under the control of the control device 5 based on the output from each operation switch provided in 7 As a result, the air flow rate is changed to the drive timing, drive cycle, and stop of the cooler 30 via the cooling circuit 31. Position of mixing damper 20 by the output of circuit 32 is the position of the mode switching damper 24 by the output of the driver circuit 34 including the actuator, are controlled.
[0028]
The operation of the vehicle air conditioner 1 according to the present invention will be described by taking an automatic air conditioner as an example.
[0029]
When the execution of the program is started, the initial setting is made, and the setting vehicle is set by the output of each sensor 36, 38, 40, 42, 44, the output of the potentiometer 46, and the temperature increase instruction switch 76 and the temperature decrease instruction switch 78. The room temperature is read and temporarily stored in the RAM 56. Subsequently, the setting state of each switch on the operation / display panel 7 is read.
[0030]
Subsequently, the target blown air temperature T0 of the air blown into the vehicle compartment 48 is temporarily stored in the RAM 56 after calculation. In order to calculate the target blown air temperature T0, calculation is performed from the detected inside air temperature Tr, the detected outside air temperature Ta, the detected value of the solar radiation amount Ts, the set cabin temperature Td, and the like, and the calculation formula includes a plurality of calculation count data K1n. And correction data K2 is necessary. The target blown air temperature T0 is related to the deviation between the set cabin temperature Td and the detected inside air temperature Tr, and further corresponds to a value corrected by the detected outside air temperature Ta and the solar radiation amount Ts.
[0031]
The drive control of the blower 16 applies a drive voltage between the voltage V0 and the voltage V1 based on the preset pattern shown in FIG. 4A to the drive motor of the blower 16 based on the target blown air temperature T0. Is done by.
[0032]
On the other hand, the opening degree θ (%) of the mix damper 20
θ = 100 (T0−Te) / (Th−Te)
Is temporarily stored in the RAM 56 after calculation.
[0033]
Here, the opening θ of the mix damper 20 corresponds to the target blown air temperature T0, the evaporator outlet air temperature Te, and the heater temperature Th as schematically shown in FIG. In each mode, control is performed according to the curve ε in FIG. 4B, and in each of the vent and bi-level modes, control is performed according to the curve ζ in FIG. 4B. The amount of air passing through the heater 22 is increased by increasing the opening degree θ of the mix damper 20. The heater temperature Th is detected by a heater temperature sensor 42. The evaporator outlet air temperature Te is detected by the evaporator outlet air temperature sensor 40.
[0034]
Further, as shown in FIG. 4C, the automatic switching of the mode switching damper 24 is performed from a vent blowout air outlet that blows out air from the vent blowout air outlet 24-1, or a foot air outlet 24-2, based on the target blowout air temperature T0. It is switched to the bi-level blowout that blows air from the foot blowout that blows out air, the vent blowout port 24-1 and the foot blowout port 24-2. In this switching, hysteresis is provided.
[0035]
Change point T in FIG. ₁ Target blowout air temperature, change point T ₂ The target blowing air temperature, the range of drive voltages V0 to V1, the slope of the straight line γ, and the slope of the straight line δ vary depending on the vehicle type, the characteristics of the blower 16, and the like. Change point T for switching the outlet in FIG. _Three ~ T ₆ The target blowing air temperature varies depending on the vehicle type and the like. These are stored in the EEPROM 58 and need to be updated whenever the vehicle type, blower 16, heater 22, and cooler 30 are changed.
[0036]
Furthermore, the opening degree θ obtained by the above calculation is a theoretical value, and the correction coefficient data thereof is obtained from the vehicle type, the characteristics of the blower 16, the characteristics of the heater 22, and the characteristics of the cooler 30. It is stored in the EEPROM 58 in the form of a table. Every time the vehicle type, the blower 16, the heater 22, and the cooler 30 are changed, it is necessary to update the correction data stored in the EEPROM 58 corresponding to the change. This amount of data is usually the largest.
[0037]
However, a plurality of calculation coefficient data K1n and correction data K2 for calculating the target blown air temperature T0, and a target blown air temperature T for controlling the air volume of the blower 16. ₁ , T ₂ , Gradients γ, δ and upper and lower limit voltage values V0, V1 of the drive voltage, the pattern of the opening θ of the mix damper 20 shown in FIG. 4B, and the target blown air temperature T for switching the mode switching damper 24 _Three ~ T ₆ These are data for determining the air conditioning characteristics of the vehicle air conditioner 1 and are written in the EEPROM 58.
[0038]
Therefore, the data stored in the EEPROM 58 including the calculation coefficient data and the correction data is used every time the vehicle type, the blower 16, the heater 22, and the cooler 30 are changed, and the air blowout duct to the air conditioning duct 12 and the vehicle compartment 48. Updated each time the effective cross-sectional area, shape, and piping path of the pipe are changed, and whenever the link of the intake damper 14, the link of the mix damper 20, and the link of the mode switching damper 24 are changed. Will need to be done.
[0039]
Further, it may be necessary to newly write data for determining the air conditioning characteristics of the vehicle air conditioner 1 in the EEPROM 58 in which no data is stored.
[0040]
Next, FIG. 5 and FIG. 5 show the data writing when it is necessary to newly write or update the data for determining the air conditioning characteristics including the calculation coefficient data and the correction data in the EEPROM 58. This will be described based on the flowchart shown in FIG.
[0041]
When data is written or updated, an EEPROM writer 68 is connected to the CPU 52 via the communication port 69.
[0042]
When the power is turned on, the air conditioner mode is initially set (step S1), the data stored in the EEPROM 58 is checked every predetermined amount (step S2), and whether or not there is an error in the check result is checked. (Step S3). This check is performed by checking with sum check data.
[0043]
If it is determined that an error has occurred following step S3, the error data is corrected (step S4). These checks are performed by the CPU 52. When it is determined in step S4 that an error has occurred, the data for one packet having the error is rewritten to the data for rewriting at the time of writing error in the ROM.
[0044]
When it is determined in step S3 that no error exists, and when the error data has been corrected in step S4, a protocol for monitoring information for the air conditioner is transmitted (step S5). By executing step S5, the data in the RAM 56 can be monitored by the RAM monitor. Subsequent to step S5, the vehicle air conditioner 1 performs air conditioning under the control of the automatic air conditioner control circuit 5-1 (step S6).
[0045]
Subsequent to step S6, when a predetermined period elapses, the process is repeated from step S5 (step S7), and it is checked in step S7 whether the dip switch 66 has been switched before elapse of the predetermined period (step S7). Step S8). When switching of the dip switch 66 is detected in step S8, the air conditioner operation is stopped (step S9), and then the communication protocol of the EEPROM writer 68 is set by the CPU 52 (step S10).
[0046]
The EEPROM writer 68 sends a predetermined signal to the CPU 52, and the CPU 52 checks whether or not the transmitted signal matches the predetermined signal (step S11). As a result of this check, when it is determined that they do not match, the process is executed again from step S7 following step S11. This coincidence determination is made functionally in the determination circuit 5-2.
[0047]
If it is determined in step S11 that they match, it is confirmed that the EEPROM writer 68 is connected, and a reception confirmation signal (also referred to as ACK) is sent to the EEPROM writer 68 following step S11 ( Next, it is permitted to receive information from the EEPROM writer 68 (step S13). This permission is functionally performed by the detection circuit 5-3 only when a write instruction is given by the DIP switch 66 and a match is detected by the determination circuit 5-2. Therefore, the double check of the switching of the dip switch 66 and the determination by the determination circuit 5-2 is performed, and writing is not permitted due to an erroneous operation and a signal from the RAM monitor.
[0048]
If reception of information is permitted in step S13, information sent from the EEPROM writer 68 is received and temporarily stored in the RAM 56 under the control of the CPU 52 (step S14). Subsequently, the storage in the RAM 56 is continued until a predetermined amount of information, that is, information for one packet is stored (step S15).
[0049]
In this state, the vehicle air conditioner 1 does not operate the air conditioner, and the information sent from the EEPROM writer 68 may be temporarily written in the area of the RAM 56.
[0050]
When a predetermined amount of information, that is, information for one packet is stored in step S15, ACK is sent from the CPU 52 to the EEPROM writer 68 following the end of the storage. Information once stored in the RAM 56 is written into the EEPROM 58 under the control of the CPU 52. In this case, the information includes address data, and data including calculation data and correction data for determining the corresponding air conditioning harmony characteristics is written to the address of the EEPROM 58 based on the address data (step S16).
[0051]
Subsequently, it is checked whether or not write information is input from the EEPROM writer 68 (step S17). If it is determined in step S17 that write information is input from the EEPROM writer 68, step S17 is followed by step S14. It is executed repeatedly.
[0052]
The timing of writing information from step S14 is schematically as shown in FIG.
[0053]
As shown in FIG. 7 (a), information is transmitted from the EEPROM writer 68. When one packet of information transmitted is received and stored once in the RAM 56, an ACK is received as shown in FIG. 7 (b). The information sent to the writer 68 and then temporarily stored in the RAM 56 is written in the EEPROM 58 as shown in FIG. Subsequently, when ACK is received and there is information to be written next, the information is transmitted from the EEPROM writer 68. The system waits for the transmission of information from the EEPROM writer 68, and operates in the same way when there is transmission. Therefore, even if information transmission from the EEPROM writer 68 is intermittent, writing is performed substantially without blanks.
[0054]
If it is determined in step S17 that no write information is input from the EEPROM writer 68, the information received from the EEPROM writer 68 in step S14 is sent to the EEPROM writer 68 for checking (step S18). ).
[0055]
In response to the information sent in step S18, the EEPROM writer 68 compares it with the send data stored in the EEPROM writer 68.
[0056]
Following step S18, the EEPROM writer 68 checks whether all the data written to the EEPROM 58 has been sent to the EEPROM writer 68 (step S19). If any data remains, the process is repeated from step S14.
[0057]
If it is determined in step S19 that all the data written in the EEPROM 58 has been sent to the EEPROM writer 68, following step S19, it is checked whether or not there is a request for air conditioner operation (step S20). When there is, air conditioner operation is started from step S1.
[0058]
When it is determined in step S20 that the air conditioner operation is not requested from the EEPRO writer 68, it waits for a predetermined period to elapse (step S21), and is executed from step S1 following step S21 to enter the air conditioner operation. .
[0059]
Before the predetermined period of time elapses in step S21, it is checked whether or not the dip switch 66 remains switched in step S8 (step S22). If it is determined in step S22 that the switching has been returned, the process proceeds to step S22. Subsequently, the air conditioner operation is started from step S1.
[0060]
As described above, according to the vehicle air conditioner 1, since the EEPROM 58 is used in place of the mask ROM, the shape and piping path of the vehicle type, the cooler, the blower, the heater, the air conditioning duct, the duct of the air outlet, Data can be easily written to the EEPROM 58 in response to changes in the shape, piping route, and link of each damper. The data stored in the EEPROM 58 can be used for the shape and piping of the vehicle type, cooler, blower, heater, air conditioning duct. It can be easily updated in accordance with changes in the route, the shape of the duct of the air outlet and the piping route, and the link of each damper.
[0061]
Furthermore, data writing to the EEPROM 58 is permitted only when the instruction from the DIP switch 66 and the EEPROM access permission signal sent from the EEPROM writer 68 match the stored data. The vehicle air conditioning does not have an unplanned effect due to erroneous data being written by the signal from.
[0062]
【The invention's effect】
As described above, according to the vehicle air conditioner of the present invention, data including calculation coefficient data and correction data can be easily written, and data including calculation coefficient data and correction data for determining air conditioning characteristics is stored in the EEPROM. In order to write the data, an instruction by the instruction unit and a determination by the determination unit are required, and erroneous data is not written by an erroneous operation.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a vehicle air conditioner according to an embodiment of the present invention.
FIG. 2 is a schematic diagram showing a data format of information transmitted to the vehicle air conditioner according to the embodiment of the present invention.
FIG. 3 is a functional block diagram of a control device in the vehicle air conditioner according to the embodiment of the present invention.
FIG. 4 is a schematic explanatory diagram for explaining an air conditioning operation in the vehicle air conditioner according to the embodiment of the present invention.
FIG. 5 is a flowchart for explaining the operation of the vehicle air conditioner according to the embodiment of the present invention.
FIG. 6 is a flowchart for explaining the operation of the vehicle air conditioner according to the embodiment of the present invention.
FIG. 7 is a timing chart for explaining the operation of the vehicle air conditioner according to the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Vehicle air conditioner 2 ... Vehicle air conditioner main body
5 ... Control device 5-2 ... Discrimination circuit
5-3: Detection circuit 5-4: Data writing circuit
7. Operation / display panel 36. Inside air temperature sensor
38 ... Outside air temperature sensor 58 ... EEPROM

Claims (5)

In a vehicle air conditioner including a control device including a computer for controlling a vehicle air conditioner body and performing air conditioning control of a passenger compartment,
EEPROM for storing data including calculation coefficient data and correction data for determining air conditioning characteristics;
A switch for setting whether to permit writing of data into said EEPROM,
A determination circuit that determines whether an access permission signal that is transmitted from an EEPROM writer connected to the computer via a communication port and requests access permission by the EEPROM writer is a predetermined access permission signal;
A detection circuit for detecting that the switch is set to permit the writing and that the access permission signal from the EEPROM writer is a predetermined access permission signal ;
Said switch is a configured to allow the writing, and the access permission signal from the EEPROM writer come and aligned both access permission signal der Rukoto a predetermined, is transmitted from the EEPROM writer subsequently A writing circuit for writing data including calculation coefficient data and correction data for determining the air-conditioning characteristics to the EEPROM;
Equipped with a,
The air conditioner for vehicles , wherein the writing circuit writes the predetermined amount of data in the EEPROM, and then sends the written data to the EEPROM writer for checking .   2. The vehicle air conditioner according to claim 1, wherein the EEPROM is connected to the computer. 2. The air conditioning apparatus for a vehicle according to claim 1, wherein the writing circuit temporarily stores a predetermined amount of data in a RAM provided in the computer and then air conditioning characteristics in the data stored in the RAM. An air conditioning apparatus for a vehicle, wherein data including calculation coefficient data and correction data for determining the data is written in an EEPROM. In the vehicle air conditioner according to claim 1, said switch is a configured to allow the write, and both that access permission signal is predetermined access permission signal from the EEPROM writer uniform was time, the coming sent from the EEPROM writer subsequently data contains the address data of the EEPROM, the write circuit data including the calculation coefficient data and correction data determining the air conditioning properties to the address of the EEPROM based on the address data An air conditioner for a vehicle, which is written in an EEPROM.   2. The vehicle air conditioner according to claim 1, wherein a RAM monitor is connected to the communication port in addition to an EEPROM writer.

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