JPH08183320A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE: To eliminate necessity for a driver to set a specified temperature each time before starting to drive an air conditioner by automatically enumerating the setting temperature in accordance with an input signal from a thermography to detect human temperature and a holding data memorized in a data memory means. CONSTITUTION: An input signal of a thermography 40 to detect human temperature and a holding data previously memorized in a data memory means 42 are respectively input to a setting temperature enumerating means 41. Additionally, enumerated setting temperature, outside air temperature detected by an outside temperature sensor 43 and temperature in a car room detected by a car room temperature sensor 44 are respectively input to a temperature control command value computing means 45. Furthermore, an enumerated temperature control command value is input to a control means 46, and a temperature control mode of cooling, dehumidifying, warming, air blastin, etc., and a change. over mode of an inside outside air damper 19 are decided. Thereafter, a sub engine 10, a compressor 11, a condenser fan 12, a fan motor 30, a magnet clutch 25, an expansion valve 15, opening and closing valves 35, 36, a flow rate control valve 38, the inside outside air damper 19, etc., are respectively controlled so as to set temperature in the car room to be the specified temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for vehicles such as buses.

[0002]

2. Description of the Related Art A system diagram of a conventional vehicle air conditioner is shown in FIG. Inside the air conditioner unit 1, sub engine 10, compressor 11, fan motor 30, casing
17 mag is installed. Inside the casing 17, an evaporator 16, a heater coil 18, an evaporator fan 9, an inside / outside air damper 19 and the like are arranged.

Sub-engine during cooling operation and dehumidifying operation
10 is driven, and the compressor 11 and the condenser fan 12 are driven by the sub engine 10. At the same time, the pulley 23, belt 24, magnet clutch 25, fan motor 30, drive shaft 26, pulley 27, belt 28,
The evaporator fan 9 is driven via the pulley 29.
At this time, the fan motor 30 simply functions as a bearing, and the engine cooling water of the sub engine 10 is cooled by the radiator 31.

When the compressor 11 is driven, the refrigerant discharged from the compressor 11 enters the condenser 13,
Here, the condenser fan 12 radiates heat to the outside air to condense and liquefy it. The liquid refrigerant enters the evaporator 16 via the receiver 14 and the expansion valve 15, where it is evaporated and vaporized by exchanging heat with the air inside the vehicle or the outside air blown by the evaporator fan 9, and then returns to the compressor 11.

When the evaporator fan 9 is driven, the vehicle interior air or the outside air is drawn into the casing 17 from the inside air inlet 20 or the outside air inlet 21 selected by switching the inside / outside air damper 19. The air sucked into the casing 17 becomes conditioned air by passing through the evaporator 16 and the heater coil 18, is urged by the evaporator fan 9, and then is blown into the vehicle interior from the blowout port 37 through a duct (not shown). .

During the heating operation, the sub engine 10 is stopped and the fan motor 30 is driven. When the fan motor 30 is driven, the power from this is transmitted to the evaporator fan 9 via the drive shaft 26, the pulley 27, the belt 28, and the pulley 29 to rotate it. At this time, the magnet clutch 25 is disengaged.

At the same time, since the on-off valves 35 and 36 are opened, a part of the high-temperature engine cooling water flowing out from the main running engine 32 is supplied to the heater coil 18 via the on-off valve 36 and the flow control valve 38. Then, after radiating heat to lower the temperature, it returns to the main engine 32 through the on-off valve 35. Most of the high-temperature engine cooling water enters the radiator 34 where it radiates heat to the outside air blown by the radiator fan 33 and then returns to the main engine 32.

In this air conditioner, the outside temperature,
Calculate the temperature control command value from the vehicle interior temperature and its set temperature,
Based on this temperature control command value, the temperature control mode for cooling, dehumidification, heating, etc. and the switching mode of the inside / outside air damper 19 are determined so that the vehicle interior temperature reaches the set temperature, the sub engine 10, the compressor 11, the expansion valve 15 , Inside / outside air damper 19, fan motor 30,
The on-off valves 35, 36, the flow control valve 38, and other devices were controlled.

[0009]

In the above-mentioned conventional vehicle air conditioner, the occupant must set the set temperature by operating the button on the control panel before starting the operation thereof. Was complicated and its operation was troublesome.

[0010]

SUMMARY OF THE INVENTION The present invention has been invented to solve the above problems, and its gist is to provide an outside air temperature sensor for detecting an outside air temperature and a temperature inside a vehicle compartment. A room temperature sensor, a thermography for detecting a human body temperature, a set temperature calculation means for calculating a set temperature based on an input signal from the thermography and holding data stored in the data storage means, the outside air temperature sensor and the room temperature. A calculation means for calculating a temperature control command value based on the detected temperature of the sensor and the set temperature calculated by the set temperature calculation means, and a temperature control mode and a switching mode of the inside / outside air damper based on the calculated temperature control command value. And a control means for controlling each device.

[0011]

In the present invention, the set temperature is calculated based on the input signal from the thermography and the holding data stored in the data storage means, and based on the calculated set temperature and the detected temperatures of the outside air temperature sensor and the room temperature sensor. To calculate the temperature control command value. Then, the temperature control mode and the inside / outside air mode are determined based on the temperature control command value to control each device.

[0012]

1 is a control block diagram of an air conditioner according to an embodiment of the present invention. The system diagram of the air conditioner is the same as the conventional one shown in FIG.

The input signal of the thermography 40 for detecting the human body temperature and the holding data previously stored in the data storage means 42 are input to the set temperature calculation means 41, where the set temperature is calculated based on them.

The thermography 40, which is also called an infrared thermal imager, detects infrared energy radiated from an occupant by an infrared camera and calculates it by a microcomputer inside a processor to obtain the human body temperature of the occupant.

The set temperature calculated by the set temperature calculation means 41, the outside air temperature detected by the outside air temperature sensor 43, and the temperature inside the vehicle compartment detected by the room temperature sensor 44 are input to the temperature adjustment command value calculation means 45, where Then, the temperature control command value is calculated based on these.

The calculated temperature control command value is input to the control means 46, and the temperature control mode for cooling, dehumidifying, heating, blowing, etc. and the switching mode of the inside / outside air damper 19 are determined based on this temperature control command value. The sub-engine 10, the compressor 11, the condenser fan 12, the fan motor 30, the magnet clutch 25, the expansion valve 15, the opening / closing valves 35 and 36, the flow control valve 38, and the inside / outside are controlled so that the vehicle interior temperature becomes the set temperature according to the command from this time. Devices such as the air damper 19 are controlled.

In the set temperature calculating means 41,
Since the set temperature is automatically calculated based on the input signal from the thermography 40 and the held data stored in the data storage means 42, the occupant is required to operate each time prior to the start of the operation of the air conditioner like the conventional one. Since it is not necessary to set the set temperature, the button for setting the set temperature can be omitted from the control panel.

[0018]

According to the present invention, the set temperature is automatically calculated in the set temperature calculation means based on the input signal from the thermography and the holding data stored in the data storage means. The occupant does not need to set the set temperature each time before starting the operation of the air conditioner, and accordingly, the button for setting the set temperature can be omitted from the control panel. As a result, the control panel is simplified and its operation becomes easy.

[Brief description of drawings]

FIG. 1 is a control block diagram of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a schematic system diagram of a conventional air conditioner.

Claims (1)

[Claims] 1. An outside air temperature sensor for detecting an outside air temperature, a room temperature sensor for detecting a temperature inside a vehicle, a thermography for detecting a human body temperature, an input signal from the thermography, and a holding unit stored in a data storage means. A set temperature calculating means for calculating a set temperature based on the data, and a calculating means for calculating a temperature control command value based on the detected temperatures of the outside air temperature sensor and the room temperature sensor and the set temperature calculated by the set temperature calculating means. An air conditioning apparatus for a vehicle, comprising: a control unit that determines a temperature control mode and a switching mode of the inside / outside air damper based on the calculated temperature control command value and controls each device.