JP3535950B2 - Control panel of vehicle air conditioner - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control panel for an air conditioning system for a vehicle, which is provided with a display section for displaying respective operating states by operating various switches.

[0002]

2. Description of the Related Art For example, in an air conditioner used in an electric vehicle, cooling water heated by cooling an engine cannot be used as a heating medium for heating. Therefore, for example, a vehicle air conditioner disclosed in Japanese Patent Laid-Open No. 8-197937 is known.

This air conditioner comprises a duct for sending air toward the passenger compartment, an air blower for blowing air into the passenger compartment in the duct, a refrigerant compressor for compressing and discharging the refrigerant, and a refrigerant compressor for the refrigerant compressor. A refrigeration cycle having a refrigerant water heat exchanger for heating the hot water by exchanging heat between the discharged high temperature refrigerant and hot water, and a refrigeration cycle having a refrigerant evaporator for cooling air by the heat of evaporation of the refrigerant, and the refrigerant water heat exchanger A hot water cycle having a pump that circulates the hot water heated by, and a hot water type heater that is disposed in the duct and that heats the air flowing in the duct by the hot water that has flowed in from the refrigerant water heat exchanger. There is. Further, in the hot water cycle described above, a combustion type heater that heats hot water by the combustion heat of fuel is connected in series with a hot water type heater in order to obtain sufficient heating capacity in cold regions.

[0004]

By the way, normally, in an air conditioner for an electric vehicle, the air conditioner may temporarily stop during heating. For example, in the above-described conventional technique, when the refrigerant water heat exchanger (outdoor heat exchanger) is frosted, even if the heating operation mode is selected, the desired heating operation is performed for a predetermined time only to perform defrost control. Be stopped. Immediately after the combustion heater is turned "ON", there is a ready state for operation of the combustion heater from when the fuel is ignited until the combustion heater starts a predetermined operation. Furthermore, when the outside air temperature is low, the heating operation by the heat pump control may be prohibited.

However, even in each of the above stopped states, the control panel of the air conditioner displays, for example, "A".
"UTO" and "AUX HTR" are displayed. As a result, the passengers often mistakenly think that the air conditioner is out of order, and the reliability of the product is inferior. In addition, there is a problem in that the occupant may set the set temperature to an unnecessarily high level when the occupant tries to change the air conditioner to a desired state, and stable air conditioning cannot be performed.

The present invention solves this kind of problem and allows an occupant to easily and surely check the operating condition of the air conditioner, which enables stable air conditioning.
An object of the present invention is to provide a control panel for a vehicle air conditioner having excellent visibility.

[0007]

In order to solve the above-mentioned problems, a control panel for a vehicle air conditioner according to the present invention includes various switches for operating each function of the air conditioner, and the various switches described above. Each operating state by the operation of is displayed on the display unit. At that time, the display unit is provided with standby display means for displaying at least the heating operation stop state during defrosting. Therefore, in order to perform defrost control, even if the heating operation mode is selected and the desired heating function is not immediately obtained, the occupant of the air conditioning system is displayed by the standby display means. There is no mistaken recognition as a failure.

As a result, the occupant can immediately and accurately recognize the operating condition of the air conditioner, and the reliability of the product is effectively improved. In addition, the occupant does not have to make a mistake in the operation, and stable air conditioning is possible.

Further, the standby display means displays that the combustion type heater is in the ignition control state or the extinction control state.
Therefore, it is possible to more accurately grasp the operating status of the combustion heater. Further, by providing the operation prohibition state display means for displaying that the outside air temperature is equal to or lower than the temperature at which the heating operation can be performed by the heat pump control, it is possible to reliably determine whether or not the heat pump itself has a failure.

Furthermore, a single defroster drive for automatically selecting and driving an air conditioning defroster for blowing air to the windshield glass and an electric defroster for energizing the heating wire buried in the windshield glass. Equipped with a switch. Therefore, the defroster selection operation can be easily performed, and the entire control panel can be simplified and the visibility can be improved.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic structural explanatory view of an automatic air conditioner 12 for an electric vehicle in which a control panel 10 according to an embodiment of the present invention is incorporated.

The automatic air conditioner 12 cools the duct body 14 that blows out temperature-controlled and humidity-controlled air into the passenger compartment and heat exchanges between the air flowing through the duct body 14 and a cooling medium. Cooling medium circuit 16
And a heating medium circuit 18 for heating the air by exchanging heat between the air flowing in the duct body 14 and the hot water, and an air mix of cold air and warm air arranged in the duct body 14. Air mix means 20 for controlling
And an automatic air conditioner ECU 22 for controlling the operating state of each device including the air mixing means 20.

The duct main body 14 is arranged on the front side of the vehicle compartment through an instrument panel (not shown), and the upstream side of the duct main body 14 introduces the inside air for introducing the air in the vehicle compartment. An opening 24 and an outside air introduction port 26 for introducing air outside the vehicle compartment are provided via a switching damper 28 so as to be openable and closable.

A blower 30 is arranged in the duct body 14 close to the switching damper 28 side, and an evaporator 32 constituting the cooling medium circuit 16 is arranged downstream of the blower 30. A heater core 34 that constitutes the heating medium circuit 18 is disposed on the downstream side of the evaporator 32, and the air mixing means 2 is provided on the inlet side of the heater core 34.
0 is installed. The air mix means 20 is provided with an air mix damper 36, and the air mix damper 36 is rotatable via an air mix motor 38 at any angle within a range from a position of 0% opening to a position of 100% opening. Is.

On the downstream side of the duct body 14, a diff outlet 40 for blowing air toward the inner surface of the front windshield of the electric vehicle, a face outlet 42 for blowing air toward the head of the occupant, and an occupant. And a foot outlet 44 that blows out air toward the foot portion of the. The diff blow-out port 40, the face blow-out port 42, and the foot blow-out port 44 are respectively provided with a diff damper 46, a face damper 48, and a foot damper 50.
Is rotatably attached.

The outlet mode is the differential outlet 40.
"DEF mode" that opens and closes the foot, foot outlet 44
“FOOT mode” for opening and closing the “FOT mode”, and “F for opening and closing the differential outlet 40 and the foot outlet 44
"OOT / DEF mode", "VENT mode (or FACE mode)" for opening and closing the face outlet 42, and "B / L mode" for opening and closing the face outlet 42 and the foot outlet 44 ing.

The evaporator 32 exchanges heat between the cooling medium flowing into the inside of the duct body 14 and the air sent through the blower 30 into the duct main body 14 to evaporate and vaporize the cooling medium, and at the same time, to the air. Has the function of cooling. Cooling medium circuit 1 including this evaporator 32
6 includes a compressor 52, and the compressor 52
An accumulator 56 is interposed in the refrigerant pipe 54a that connects the suction port side and the outlet side of the evaporator 32.
The compressor 52 compresses the cooling medium (gas refrigerant) sucked inside from the suction port and discharges it as a high-temperature, high-pressure cooling medium from the discharge port side to the refrigerant conduit 54b side. The accumulator 56 has a function of separating the cooling medium into a liquid refrigerant and a gas refrigerant and supplying only the gas refrigerant to the compressor 52.

The refrigerant conduit 54b is branched into refrigerant conduits 54c and 54d on the tip side thereof, and the refrigerant conduit 54b
c branches into the refrigerant pipes 54e and 54f. Refrigerant line 54
The first electromagnetic valve 58 is provided in c, the second electromagnetic valve 60 is provided in the refrigerant pipe 54f, and the refrigerant pipe 54f is connected to the refrigerant pipe 54a. Refrigerant line 54
An outdoor heat exchanger 62 is provided at e, and the outdoor heat exchanger 62 heat-exchanges the cooling medium in a gas-liquid two-phase state of low temperature and low pressure and the outdoor air blown by the outdoor fan 64 during heating operation. While evaporating and evaporating the cooling medium, it has a function of condensing and liquefying the gas refrigerant by exchanging heat between the high-temperature, high-pressure gas refrigerant and the outside air blown by the outdoor fan 64 during the cooling operation.

A third solenoid valve 66 and a first capillary tube 68 for heating are juxtaposed to the refrigerant pipe 54d, and the refrigerant pipe 54d and the refrigerant pipe 54e are integrated as a refrigerant pipe 54g. And is connected to the introduction side of the evaporator 32. A second capillary tube 70 for cooling is provided in the refrigerant conduit 54g.

The heating medium circuit 18 is provided with a hot water circulation path 72 for circulating and supplying hot water to the heater core 34, and a water pump 74 and a combustion heater 76 are arranged in the hot water circulation path 72. An outer pipe portion 78 having a double pipe structure is provided in a part of the hot water circulation passage 72 so as to surround the refrigerant pipe passage 54b of the cooling medium circuit 16 over a predetermined length, and the refrigerant pipe passage 54b and the outside pipe portion 78 are provided. A medium heat exchanger 80 is configured by the pipe portion 78. This medium heat exchanger 80 cools the hot water as a heating medium passing through the outer pipe portion 78 of the hot water circulation passage 72 and the cooling when the high temperature, high pressure cooling medium discharged from the compressor 52 flows through the refrigerant pipe 54b. It has a function of heating the warm water by exchanging heat with the medium.

As shown in FIG. 2, the combustion type heater 76 is
The heater case 84 is housed in the cover 82, and has a substantially cylindrical heater case 84 with one end closed. In the heater case 84, a substantially cylindrical combustion cylinder 86 whose one end is similarly closed is coaxially arranged, and on the opening side of the heater case 84, a blower 90 is provided via a motor unit 88. Is installed.

A heat exchange passage 92 is formed between the heater case 84 and the combustion cylinder 86, and the hot water inflow port 94 formed in the heater case 84 is formed in the heat exchange passage 92.
And the outflow port 96 for hot water communicates. The blower 90 is connected to the other end of an intake pipe 100, one end of which is connected to a silencer 98, and an exhaust pipe 102 for discharging combustion exhaust gas is provided on the opening side of the heater case 84. The hot water circulation path 72 is connected to the inflow port 94 and the outflow port 96 of the heater case 84.

The heater case 84 is close to the blower 90 and has a glow plug 104 for igniting fuel at the time of starting.
A fuel pipe 108 is connected to the glow plug 104 via a one-way valve 106.
A fuel tank 112 is connected to the fuel pipe 108 via a fuel pump 110.
Fuel such as kerosene, white gasoline or light oil is stored inside.

As shown in FIG. 1, an automatic air conditioner ECU
Reference numeral 22 denotes a vehicle-side ECU 114, a compressor inverter 116, a combustion heater ECU 118, an electric heat DEF12.
0, environmental condition input means 122 and operating state input means 1
24 is connected. The vehicle-side ECU 114 and the compressor inverter 116 are supplied with electric power from the battery 126, and the compressor inverter 116 is also provided.
Are connected to the compressor 52.

The environmental condition input means 122 determines the outside temperature (T
_AM ), an outside air temperature sensor 128, an inside air temperature sensor 130 for detecting an inside air temperature (T _R ), and an insolation amount (T
_S ) (kcal / h · m ² ) solar radiation sensor 1 for detecting
And 32. The operating state input means 124 includes a water temperature sensor 134 that detects a temperature (T _W ) of hot water flowing through the heater core 34, and an air temperature (T) at the outlet side of the evaporator 32.
_E ) and the temperature sensor 136 and the compressor 52
Pressure sensor 138 that detects the discharge pressure of the cooling medium discharged from the device, a current sensor 140 that detects the current from the battery 126, and a temperature sensor 142 that detects the cooling medium temperature (T _HO ) near the outdoor heat exchanger 62. With.

Basically, the automatic air conditioner ECU 22 basically sets the target outlet temperature (T _SET ) on the basis of the environmental conditions including the input inside air temperature (T _R ) and outside air temperature (T _AM ) and the desired set temperature (T _SET ). _AO ) and a function as an operation mode selecting means for selecting an operation mode including a cooling operation, a blowing operation and a heating operation based on the target outlet temperature (T _AO ). It also has the function of performing overall control including each device.

The control panel 10 according to this embodiment is connected to the automatic air conditioner ECU 22. As shown in FIG. 3, the control panel 10 includes an “AUTO” switch 152 for activating the automatic air conditioner 12.
And an "OFF" switch 154 for stopping the driving of the entire auto air conditioner 12 are arranged above and below the left end portion in FIG. 3, and are adjacent to them, a temperature raising switch 156 and a temperature raising switch 156. A temperature lowering switch 158 is arranged.

In the central portion of the control panel 10,
A display unit 160 is provided extending in the longitudinal direction. On the display unit 160, a temperature display (including operation prohibition state display means) 162, an outlet mode display 164, and an air volume display 1 are provided.
66, combustion type heater status display (including standby display means) 1
68 and a time display 170 are set.

Below the display unit 160, the pre-conditioner L
ED (REMOTE CONTROLLED) 171,
An outlet mode switching (MODE) switch 172, an air volume switching switch 174, and a combustion heater manual stop (AUX HTR OFF) switch 176 are arranged. Above the right end of the control panel 10, in order to automatically select and drive the air-conditioning defroster that blows temperature-controlled and / or humidity-controlled air onto the windshield glass and the electric heat DEF 120 embedded in the windshield glass. DEF switch 178 of
Below the DEF switch 178, an inside / outside air changeover switch 180 is arranged.

The combustion type heater status display 168 indicates "AUX
"HTR" display 168a and "AUX HTR OF
"F" display 168b and "STAND BY" display 168
c and are provided above and below. "AUX HTR" display 16
8a is turned on when the combustion heater activation signal is turned on, is turned off when the manual stop switch 176 is pressed, and the combustion heater 76 is turned off by the outside air temperature (T _AM ). When it goes out. "AUX H
The "TR OFF" display 168b blinks in the operation stopped state due to the inoperability of the combustion heater 76, while the manual stop switch 176 is pressed to cause the combustion heater 76 to "OF".
Lights when "F".

The "STAND BY" display 168c is turned on during the defrosting operation, the combustion heater activation signal is "ON", and the combustion heater 76 is in a normal state other than steady combustion (combustion capacity switching control). That is, in the ignition control state or the fire extinguishing control state, "AUX HTR" display 1
It lights up together with 68a. The "STAND BY" display 168c lights up while the heating operation mode is shifting from the combustion heater 76 to the heat pump control.

The operation of the automatic air conditioner 12 in which the control panel 10 thus constructed is incorporated will be described below.

First, Table 1 shows the paths of the respective cooling medium circuits 16 when the operation modes are the cooling operation, the heating operation (heat pump), the heating operation (combustion type heater) and the blowing operation.

[0034]

[Table 1]

* 1: Heat pump * 2: Combustion type heater, that is, in the cooling operation, as shown in Table 1 and FIG. 4, the first solenoid valve 58 is opened, while the second and third solenoid valves 58 are opened.
The solenoid valves 60 and 66 are closed. Therefore, the cooling medium discharged from the compressor 52 is the refrigerant pipes 54b, 5
4c, 1st solenoid valve 58, outdoor heat exchanger 62, refrigerant line 5
4 g, reaches the second capillary tube 70, and circulates in a path from the refrigerant pipe 54 a through the inside of the evaporator 32 to the compressor 52 through the accumulator 56.

Therefore, the high-temperature, high-pressure gas refrigerant discharged from the compressor 52 is radiated by the outdoor heat exchanger 62 and liquefied, and this liquid refrigerant is decompressed by flowing inside the second capillary tube 70. It becomes a refrigerant in a liquid two-phase state. This refrigerant cools the air passing through the evaporator 32 by evaporating inside the evaporator 32.

On the other hand, in the heating operation (heat pump), as shown in Table 1 and FIG.
The valves 8 and 66 are closed, and the second solenoid valve 60 is opened. Therefore, the cooling medium discharged from the compressor 52 is depressurized from the refrigerant pipes 54b and 54d through the first capillary tube 68, vaporized through the outdoor heat exchanger 62 in a gas-liquid two-phase state, and then It is circulated from the accumulator 56 to the compressor 52 through the two solenoid valve 60 and the refrigerant pipes 54f and 54a.

At that time, in the heating medium circuit 18, hot water is supplied to the outer pipe portion 78 constituting the medium heat exchanger 80. Therefore, the high-temperature, high-pressure cooling medium flows inside the outer pipe portion 78 via the refrigerant pipe line 54d, so that the hot water in the outer pipe portion 78 is heated. Then, the heated warm water is heated by the water pump 74 to generate the heater core 34.
The air introduced into the inside of the heater and passing through the heater core 34 is heated to a predetermined temperature.

Furthermore, in the heating operation (combustion type heater), as shown in Table 1 and FIG.
8, 60 and 66 are closed, the compressor 52 is turned off, and the automatic air conditioning cycle is stopped.

Then, the combustion heater 76 is driven, and as shown in FIG. 2, the blower 90 is rotationally driven under the action of the motor unit 88, and the fuel pump 110 is driven to drive the fuel ( Kerosene, white gasoline, light oil, or the like) is supplied from the one-way valve 106 to the combustion cylinder 86 via the fuel pipe 108. Then, at the time of starting, the fuel is ignited under the action of the glow plug 104, mixed with the combustion air sent from the silencer 98 via the blower 90 via the intake pipe 100, and burned.

On the other hand, the hot water circulation path 72 to the inflow port 94
The hot water is supplied to the heat exchange passage 92 in the heater case 84 via the heat exchange path, and heat exchange is performed between the hot water and the combustion exhaust flowing in the combustion tube 86, and the hot water is heated to flow from the outflow port 96 to the hot water circulation path. Returned to 72. Combustion heater 7
The hot water heated by 6 is introduced into the heater core 34 to heat the air passing through the heater core 34 to a predetermined temperature. Further, the combustion exhaust gas is discharged from the exhaust pipe 102 after heat exchange is performed in the combustion cylinder 86.

Furthermore, in the blowing operation, the first to third electromagnetic valves 58, 60 and 66 are closed and the water pump 74 is turned "OFF" to stop the cycle. This state is shown in FIG.

Next, the control method of the automatic air conditioner 12 will be described with reference to the flowchart shown in FIG.

First, the ignition is turned "ON".
After that, the "AUTO" switch 1 on the control panel 10
When 52 is turned on, the automatic air conditioner ECU 22
Is the outside air temperature sensor 1 that constitutes the environmental condition input means 122.
28, inside air temperature sensor 130 and solar radiation sensor 132
And the water temperature sensor that constitutes the operating state input means 124.
Sensor 134, temperature sensor 136, pressure sensor 138, power
The signals from the flow sensor 140 and the temperature sensor 142
While reading, temperature rise switch 156 or temperature
Set by manually operating the lowering switch 158
Desired set temperature (T _SET) Is read (in FIG. 7,
Step ST1).

Therefore, the desired set temperature (T _SET ) and the inside air temperature (T _R ) detected by the outside air temperature sensor 128, the inside air temperature sensor 130 and the solar radiation sensor 132, which constitute the environmental condition input means 122, the outside air temperature ( Based on T _AM ) and the amount of solar radiation (T _S ), the target blowout temperature (T _AO ) blown into the vehicle compartment is calculated from the following equation (1) (step ST2).

T _AO = K _SET × T _SET −K _R × T _R −K _AM × T _AM −K _S × T _S −C (1) Here, K _SET , K _R , K _AM and K _S are , And a coefficient (gain), and C represents a constant.

The target outlet temperature (T _AO ) calculated from the above equation (1) and the inside air introduction port 24 or the outside air introduction port 26.
The operation mode is selected based on the difference between the suction temperature calculation value (T _IN ) of the air sucked in from (step S
T4). The operation mode is T _AO -T _{IN as} shown in FIG.
Is selected from the cooling mode, the blowing mode and the heating mode. As a result, the process selectively proceeds from step ST5 to step ST7.

When the heating operation (heat pump) is selected in step ST4 (step ST7), the routine proceeds to the heating operation subroutine shown in FIGS. 9 and 10. That is,
First, in step ST11, the temperature (T _HO ) near the outdoor heat exchanger 62 detected via the temperature sensor 142.
Is 0 ° C. or less. If the temperature (T _HO ) is 0 ° C. or higher (NO in step ST11), step S
Proceeding to T12, the heating cycle control described above with reference to FIG. 5 is performed.

On the other hand, when the temperature (T _HO ) is 0 ° C. or lower (YES in step ST11), the process proceeds to step ST13 and the timer is started. Then, if the temperature (T _HO ) continues to be 0 ° C. or lower while the timer measures the time for 10 minutes (YES in step ST14), it is determined that the outdoor heat exchanger 62 is frosted. Next, when the ignition is turned "OFF" and the charge start signal is input (YES in step ST15 and step ST16), the process proceeds to step ST17 to start the defrosting operation. This defrosting operation is performed by the defrosting cycle control shown in Table 2 (step ST18 in FIG. 10).

[0050]

[Table 2]

In this embodiment, the ignition "OFF" and the start of charging are set as the start conditions for the defrosting operation, but the present invention is not limited to this. For example, during driving, the temperature (T _HO) ≦ 0 ℃ well be started defrosting operation when continued for 10 minutes and the temperature (T _HO) ≦ 0 ℃ 1
The defrosting operation can be performed when the operation continues for 0 minutes or more (for example, 60 minutes).

During the above defrosting operation, the control panel 1
At 0, as shown in FIG. 3, the "STAND BY" display 168c is turned on (step ST19). This "S
A timer is started at the same time when the "TAND BY" display 168c is turned on, and time is measured for 15 minutes (step ST2).
0 and step ST21).

After the timer is activated, it is judged whether the ignition is turned "ON" (step ST22), whether the charging is completed (step ST23), and whether the temperature (T _HO ) reaches a predetermined temperature. Whether or not (step ST
24) Each judgment is made, and each judgment is “YES”.
If so, the process proceeds to step ST25 and the defrosting operation is stopped. With this defrosting operation stop, "STAND BY"
The display 168c is turned off, and the heating operation is continued.

In this case, in this embodiment, step ST
Despite the heating operation (heat pump) being selected in step 4, the process proceeds to defrost cycle control (step ST18),
When this heating operation is temporarily stopped, "STAND" in the combustion heater state display 168 of the control panel 10 is displayed.
The "BY" display 168c is illuminated. Therefore, the occupant can easily and surely confirm that the heating operation is stopped because the automatic air conditioner 12 is performing the defrosting operation, and mistakenly recognizes that the automatic air conditioner 12 is out of order. Never.

As a result, the occupant can check the automatic air conditioner 12
It is possible to immediately and accurately recognize the operating condition of, and the reliability of the automatic air conditioner 12 is effectively improved. Furthermore, there is no possibility that an occupant who mistakenly recognizes that the automatic air conditioner 12 is in heating operation operates the temperature increase switch 156 to set the set temperature higher than necessary. Therefore, it is possible to reliably eliminate a problem such as a high temperature of the air blown into the vehicle interior.

Further, as shown in FIG. 3, in the control panel 10, the switches are simplified and various operating states are clearly displayed on the display section 160. Therefore, there is an advantage that the operability is excellent and the visibility is effectively improved.

On the other hand, in FIG. 7, when it is determined in step ST3 that the outside air temperature (T _AM ) is 3 ° C. or lower, the process proceeds to step ST8 to start the combustion type heater heating operation,
Proceed to the subroutine shown in FIGS. 11 and 12. That is, as described above with reference to FIG. 2, the glow plug 104
Ignition control for automatically igniting the fuel is started via (step ST31 in FIG. 11). At that time, on the control panel 10, "AUX HTR" display 168a is displayed.
Is lit up and "STAND BY" is displayed 16
8c is turned on (step ST32).

Next, when the ignition process of the combustion type heater 76 is performed and the ignition control is completed (step ST33 and step ST34), the process proceeds to step ST35,
The "STAND BY" display 168c is turned off, and "A
Only the "UX HTR" display 168a is illuminated.

Further, the combustion capacity switching control is started via the combustion heater 76 (step ST36). In this combustion capacity switching control, the combustion amount by the combustion heater 76 is
For example, 3000 kcal / h to 6000 kcal / h
In this way, the vehicle interior is heated to a predetermined temperature. This heating operation control is continuously performed during the air conditioning.

After the combustion capacity switching control is started, the ignition is turned "OFF" or the "OFF" switch 154 is turned "ON" (step ST37 and step ST38), and then within a predetermined time (for example, 5 seconds). If the ignition or the "AUTO" switch 152 is not turned "ON" (NO in step ST39 and step ST40), the process proceeds to step ST41 to end the combustion capacity switching control.

Next, the fire extinguishing control is started (step ST42), and a "STANDBY" display 168 is displayed.
c is turned on (step ST43). Then, when the combustion heater 76 is extinguished and the fire extinguishing control ends (step ST44 and step ST45), step ST4
Proceeding to step 6, the "STAND BY" display 168c is turned off.

As described above, in this embodiment, when the combustion type heater 76 is in the fire extinguishing control state, the control panel 1
In the combustion type heater status display 168 of 0, “AUX HT
"R" display 168a and "STAND BY" display 16
Both 8c are lit. For this reason, the occupant can quickly and surely recognize that the combustion heater 76 is not in the normal operating state, misidentify that the automatic air conditioner 12 is out of order, or malfunction the automatic air conditioner 12. It becomes possible to avoid a defect.

By the way, when the manual stop switch 176 is pressed after the combustion capacity switching control is started (step S
During T47, YES), it is determined whether the outside air temperature (T _AM ) is -9 ° C or lower (step ST48). If the outside air temperature (T _AM ) is -9 ° C or higher (step ST4
(NO in 8, NO), the process proceeds to step ST49, and it is determined whether the "AUTO" switch 152 is "ON" within 5 seconds. "AUTO" switch 15 within 5 seconds
If "2" is not "ON", the process proceeds to step ST41 to end the combustion capacity switching control, while if the "AUTO" switch 152 is "ON" within 5 seconds, the combustion capacity switching control is continued. It

When it is determined in step ST48 that the outside air temperature (T _AM ) is -9 ° C or lower, the process proceeds to step ST50, and the set temperature abnormality display is turned on. After that, when the "AUTO" switch 152 is turned "ON" within 5 seconds (YES in step ST51), the set temperature abnormality display is turned off and the combustion capacity switching control is continued (step S).
T52). Meanwhile, within 5 seconds, the "AUTO" switch 15
If 2 is not "ON", the process proceeds to step ST41,
The combustion capacity switching control is ended.

As shown in FIG. 13, the outside air temperature (T
_{If AM} ) is -11 ° C or lower, heat pump operation is prohibited. At that time, the temperature display 1 on the control panel 10
62 is displayed with "---" as shown in FIG.
The occupant can be notified that the heating operation by the heat pump control is prohibited. Therefore, the occupant can surely know the operating state of the automatic air conditioner 12, and does not mistakenly recognize that the automatic air conditioner 12 is out of order. Here, when the outside air temperature (T _AM ) is equal to or lower than the prohibited temperature of the heat pump operation and the combustion heater operation is stopped, the “AUXHTR OFF” display 168b is turned on.

[0066]

As described above, in the control panel of the vehicle air conditioner according to the present invention, the operating state of each function of the air conditioner is displayed on the display unit, and this display unit
At least standby display means for displaying the heating operation stop state at the time of defrosting is provided. Therefore, even if the heating operation mode is selected, even if the desired heating function cannot be immediately obtained because the defrosting control is performed, the passenger does not mistakenly recognize that the air conditioner has a failure. . This allows the crew to
The operating status of the air conditioner can be immediately and accurately recognized, and there is no risk of erroneous operation.

[Brief description of drawings]

FIG. 1 is a schematic configuration explanatory diagram of an automatic air conditioner incorporating a control panel according to an embodiment of the present invention.

FIG. 2 is an explanatory vertical cross-sectional view of a combustion heater that constitutes the automatic air conditioner.

FIG. 3 is a front explanatory view of the control panel.

FIG. 4 is an explanatory diagram of a cooling mode in the automatic air conditioner.

FIG. 5 is an explanatory diagram of a heating mode (heat pump) in the automatic air conditioner.

FIG. 6 is an explanatory diagram of a heating mode (combustion type heater) in the automatic air conditioner.

FIG. 7 is a flowchart illustrating an operation of the automatic air conditioner.

FIG. 8 is an explanatory diagram for selecting an operation mode.

FIG. 9 is a diagram showing a former part of a heating operation subroutine.

FIG. 10 is a diagram showing a latter part of the heating operation subroutine.

FIG. 11 is a diagram showing a front stage part of a subroutine of a combustion type heater heating operation.

FIG. 12 is a view showing a latter part of a subroutine of the combustion type heater heating operation.

FIG. 13 is an explanatory diagram of a heat pump operation prohibition determination.

[Explanation of symbols]

10 ... Control panel 12 ... Auto air conditioner 14 ... Duct body 16 ... Cooling medium circuit 18 ... Heating medium circuit 20 ... Air mixing means 22 ... Auto air conditioner ECU 32 ... Evaporator 34 ... Heater core 72 ... Hot water circulation path 74 ... Water pump 80 ... Medium Heat exchanger 84 ... Heater case 86 ... Combustion cylinder 90 ... Blower 92 ... Heat exchange passage 118 ... Combustion heater ECU 122 ... Environmental condition input means 124 ... Operating state input means 152 ... "AUT
"O" switch 154 ... "OFF" switch 160 ... Display 162 ... Temperature display 168 ... Combustion heater status display 176 ... Manual stop switch

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B60H 1/00-3/06

Claims (3)

(57) [Claims] 1. An auto switch for operating an air conditioner, an off switch for stopping the air conditioner, a temperature setting switch for adjusting the temperature of air blown into the vehicle interior, and the vehicle interior. A mode switch for switching the air outlet mode of the device, a manual stop switch for stopping a combustion type heater arranged in a hot water cycle for heating the air with hot water, and an operating state of each of the switches is displayed. And a display unit for displaying the heating operation stop state at least during defrosting , and the combustion heater is in the ignition control state.
A control panel for a vehicle air conditioner, characterized by comprising standby display means for indicating that the vehicle is in a fire extinguishing control state . 2. The control panel for a vehicle air conditioner according to claim 1, further comprising operation prohibition state display means for displaying that the outside air temperature is equal to or lower than a temperature at which heating operation can be performed by heat pump control. panel. 3. The control panel according to claim 1, wherein an air-conditioning defroster for blowing air onto the windshield glass and an electric defroster for energizing the heating wire embedded in the windshield glass are automatically selected and driven. A control panel for an air conditioning system for a vehicle, comprising a single defroster drive switch for operating the control panel.