JP2589587Y2 - Vehicle air conditioner - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a vehicle having a large living space, such as a bus, and a passenger seat occupying most of the living space, and a space near a driver's seat without a partition wall therebetween. The present invention relates to a vehicle air conditioner which can automatically control the respective air conditioners independently and independently so that both the passenger and the driver can be in a comfortable state.

[0002]

2. Description of the Related Art Recently, living spaces (vehicles) such as passenger cars have been developed.
In vehicles having a relatively small size, a so-called auto air conditioner has been generally used. The electronic control unit automatically controls the air conditioner without the need for complicated adjustments by hand, so that a comfortable interior atmosphere can always be obtained according to the vehicle interior temperature and external temperature. The switching of the blowing mode, the adjustment of the air volume or the blowing temperature, and the like are automatically performed.

As shown in FIG. 4, in a vehicle body 1 of a vehicle having a large living space such as a bus, an air conditioning system for a passenger seat space 2 occupying most of the living space is, for example, a vehicle body 1
An evaporator, a blower, etc. are provided as an air conditioner unit 3 in the ceiling part 4 at the rear of the compressor. The refrigerant is compressed by a compressor driven by an engine (not shown), condensed by a condenser, and then passed through the expansion valve. By causing the evaporator to expand and vaporize, the air passing through the evaporator is cooled, and in addition, air is circulated as hot water by circulating engine cooling water as hot water in a reheat core arranged in series downstream of the evaporator. After heating and adjusting the air to an appropriate temperature and humidity by using them, the ceiling duct 5
And blows out to the lower passenger space 2 at an appropriate wind speed through the air outlet. (This is called “ceiling blow mode” or “Face mode”.)

On the other hand, hot water is also supplied to the heat exchanger of the rear heater 6 provided on the floor portion to heat the air to an appropriate temperature, and the air is blown out from the outlet of the duct 7 at the foot of the passenger to the feet of the passenger. "Foot blowing mode" or "Fo
"ot mode". In general, by adjusting the ceiling air volume and the foot air volume, a uniform air temperature and air velocity can be obtained as much as possible in the passenger seat space 2 as much as possible. (Note that the case where the ceiling blowing mode and the foot blowing mode are used together at an appropriate ratio is referred to as “bi-level mode” or “B
/ L mode ". )

Further, the space 8 near the driver's seat needs to have an optimum atmosphere for the driver's driving operation and the like.
Since the optimal air temperature and wind speed may differ from those in the passenger seat space 2, the front heater 9 is specially provided for the space 8 near the driver's seat, so that the seat space 2 Irrespective of this, the blowing mode, the temperature of the blowing air, the wind speed, etc. can be adjusted independently. For this purpose, the front heater 9 is configured inside the instrument panel in front of the driver's seat, and includes a heat exchanger and a blower unit for circulating hot water, and also allows some outside air to be mixed in. Air that has been mixed and adjusted to have an optimum temperature and wind speed for the driver is blown out from several switchable upper and lower outlets into the space 8 near the driver's seat.

As described above, it is desirable that the space 2 in the passenger seat and the space 8 in the vicinity of the driver's seat can be adjusted independently of each other by an air conditioner, but a partition between the space 2 and the space 8 like a bus. Is not provided, it is unavoidable that air exchange between the two areas occurs to some extent. Nevertheless, in the case of manual control in which both air conditioning controls are performed manually, a comfortable condition can be achieved by manually adjusting the blow mode, the direction of the blow outlet, the temperature of the blown air, the air volume, etc. for the passenger seat and the driver seat, respectively. Can be found.

[0007] Further, even when the air conditioning control of a bus or the like is automated as performed in a passenger car to form a so-called auto air conditioner, the air conditioner unit 3 is provided on the rear ceiling portion of the vehicle body 1 as in the conventional example of FIG. In the case of the housed structure, since the entire air flow occurs as shown by the hatched arrow, the in-room air sensor 10 for detecting the temperature of the passenger seat space 2 is provided at the rear portion far away from the space 8 near the driver's seat. Attached near the air inlet of the air conditioner unit 3 and a front inside air sensor 11 for detecting the temperature near the driver's seat near the air inlet of the front heater 9 in the space 8 and the like, depending on the temperature of the space of the other party, Inside air sensor 1
The detected values of 0 and 11 can be made less sensitive to the temperature of the other party.

[0008]

Recently, in order to enhance the appearance of the vehicle body 1 and to balance the weight of the engine provided at the rear of the vehicle body 1, the air conditioner unit 3 is mounted as shown in FIG. It is often provided on the ceiling portion 12 at the front of the vehicle body 1. In this case, since the air inlet of the air conditioner unit 3 is opened above the space 8 near the driver's seat, the room air sensor 10 is provided near the air inlet. 5, the room air sensor 10 is exposed to the air blown out by the front heater 9, and the temperature of the space 8 near the driver's seat is detected as the temperature of the space 2 of the customer seat. In the case of automatic control, for example, control may be performed so as to excessively lower the temperature of the space 2 in the passenger seat, and there is a possibility that an atmosphere such as a temperature and a wind speed that is comfortable for the passenger is not formed.

However, even in the configuration of the air conditioner as shown in FIG. 5, the room air sensor 10 is connected to the space 8 near the driver's seat.
If it is provided in a proper position in the rear part of the vehicle far from the vehicle, the influence of the front heater 9 can be avoided. However, the distance between the air conditioner unit 3 and the room air sensor 10 becomes longer, Not only the wiring of the air conditioner becomes longer, but also
The fan provided in the room air sensor 10 is constantly rotated by the motor so that the air in the space 2 of the customer seat flows around the room air sensor 10 without stagnation because the air cannot be provided in the air inlet of the room. A need arises and there is concern that the fan motor of the sensor will fail during long periods of continuous operation.

Therefore, the present invention is mainly applied to a case where the living space is large like a bus, there is no partition between the space of the passenger seat and the space near the driver's seat, and the air conditioners of both spaces are automatically controlled independently. In order to solve the problems mentioned above, the driving time of the fan motor of the sensor is minimized to avoid the failure, and as simple as possible means that the majority of the occupants and the drivers can An object of the present invention is to make it possible to automatically control a rear air conditioner and a front air conditioner independently of each other so that a comfortable atmosphere can always be obtained stably.

[0011]

According to the present invention, as means for solving the above-mentioned problems, there is provided a method as set forth in claim 1.
To, at least cooling capacity, suction port in the cabin air is accommodated in the front ceiling of the vehicles is provided in the front roof part, and air conditioning unit capable of blowing air from above the rear seats A rear heater that can blow air from below the rear seat, a front heater that can blow air from upper and lower outlets to a space near a driver seat at a front end of the vehicle, and a space near the driver seat. A first inside air sensor mounted near an air inlet to the air conditioner unit in an upper part of the rear seat;
A second inside air sensor mounted in the space where the seat is arranged , and a control device that can automatically control and operate the air conditioner unit, the rear heater, and the front heater based on detection values of the two inside air sensors, The control device uses a detection value of only one of the first inside air sensor and the second inside air sensor for control in a state where the front heater is not operated. I will provide a. The present invention
As another means for solving the above-mentioned problems,
As described in Item 2, the second inside air sensor is configured to
Attached near the heater inlet,
When the heater is stopped and the air conditioner unit is operating
In this case, the detection value of the first inside air sensor is used for control.
Air conditioner for a vehicle, characterized in that
I will provide a.

[0012]

The air conditioner unit having at least the cooling capacity can blow cool air or the like downward from the upper part of the passenger seat space, and the rear heater can blow warm air or the like from the lower part of the guest seat space toward the feet. By changing the blowing mode by the selective driving thereof, or by adjusting the air volume and temperature of the air to be blown, the temperature and the wind speed of the passenger seat space are controlled so as to be comfortable for the passengers. Not only can it be done manually, but also automatically by the controller. In addition, the blowing of air by the front heater into the space near the driver's seat can be performed substantially independently of the air conditioning control of the passenger seat space by selecting the upper and lower outlets and adjusting the air volume and temperature of the blowing air. Although the control can be performed so that a person or an assistant feels comfortable, this control can be performed not only manually but also automatically by a control device.

When air conditioning control of at least one of the passenger seat space and the space near the driver's seat is automatically performed by the control device, the control device uses the detection value of the first inside air sensor or the second inside air sensor. Automatically select the blowing mode of each air conditioning unit, and determine the air volume and temperature of the air blown out by them . At this time, any of the driving sky
Control unit installed near the suction port
Select inside air sensor and use its detection value for control
The average temperature using the airflow at the suction port
Make it detectable. Also, according to the invention of claim 3, the detected value
Fan motor attached to the inside air sensor that does not use
By stopping the fan motor drive time.
Decrease and improve durability.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the present invention, FIG. 1 schematically shows a layout of an air conditioner in a vehicle body 1 having a large living space such as a bus. Since the present invention does not have a feature in the basic structure of the air conditioner, a detailed description thereof will be omitted, but a front ceiling portion 12 of the vehicle body 1 in the embodiment is omitted.
Contains an air conditioner unit 3 as shown in FIG. 2, and a refrigerant circulating in a refrigeration circuit of the air conditioner unit 3 is compressed by a compressor provided near an engine (not shown), and is condensed by a condensing unit below the floor. The heat is radiated into the outside air to be condensed and liquefied, and expanded in the evaporator 13 through a throttle such as an expansion valve (not shown) in the air conditioner unit 3 on the ceiling to cool the air passing through the evaporator 13 and to cool the cooled air in the customer seat. The air is blown downward from the outlet of the ceiling duct 5 toward the space 2 and the space 8 near the driver's seat. The air in the passenger seat space 2 and the space 8 near the driver seat flows out of the air inlet duct 14 into the space 12 in the ceiling, and is pressure-fed to pass through the evaporator 13 by a blower 15 driven by a motor, and cooled.・ Dehumidified. Ceiling part 1
An external air damper 17 is provided following the front opening 16 to the space 2 and when it is open, the external air is taken in and the internal air is blown from the blower 15 to the evaporator 13.
Sent to

The air conditioner unit 3 in this embodiment
Is not merely a cooler (cooling device), but a flowing water type reheat core 18 as a heat exchanger is provided downstream of the air flow of the evaporator 13 as shown in FIG. (Engine cooling water) pipe is connected, and hot water can flow into the reheat core 18 when a control valve such as a solenoid valve capable of adjusting a flow rate inserted into the pipe is opened. Since the air which has been cooled by the evaporator 13 and whose water content has been removed is heated again, the air passing therethrough can be dehumidified. Needless to say, if hot water is allowed to flow through the reheat core 18 when the compressor is stopped and the refrigerant is not circulating, the air conditioner unit 3 operates as a heater (heating device).

The air in the passenger compartment is supplied to the air inlet duct 14.
When the inside air damper 19 is opened, the air is sucked into the front ceiling portion 12 of the vehicle body 1 from the air inlet duct 14, and when the outside air damper 17 is open, the outside air taken in from the front opening 16 is removed. After being mixed, the air is sucked into the air-conditioning unit 3 at the ceiling by the blower 15 and cooled or subjected to a process such as dehumidification or heating to adjust the temperature and humidity. As a result, the air is diverted from a large number of ceiling outlets that open above each seat and blown out into the space 2 of the customer seat. The rotation speed of the motor for driving the blower 15 can be adjusted in multiple stages by a control device (not shown), whereby the amount of air blown from the outlet of the ceiling duct 5 can be freely adjusted. Also, the flow rate of the hot water flowing through the reheat core 18 can be changed in multiple stages by adjusting the opening degree of the control valve inserted into the passage by a signal from the control device. The temperature can be adjusted automatically.

A rear heater 6 for heating the passenger seat space 2 is provided at a lower portion of the bus body 1 separately from an air conditioner unit 3 provided at a ceiling portion in front of the bus body 1. In the embodiment shown in FIG. 1, the rear heater 6 is housed inside a relatively front floor portion of the bus body 1 and is connected to a rear heater dedicated foot duct 7 extending rearward along the floor. ing. Although not shown, the rear heater 6 includes an opening (suction port) for sucking air from the vehicle interior, a blower with a motor for suction and blowing, and a heater core as a heat exchanger for circulating hot water (cooling water for the engine). And a solenoid valve for opening and closing the flow path of hot water. The duct 7 for the rear heater 6 is also provided with as many outlets as possible so that warm air can be blown toward the feet of the passenger. Therefore, by controlling the signal of the control device to open and close the solenoid valve, it is selected whether or not hot water flows into the rear heater 6, and the control device changes the rotation speed of the motor driving the blower to adjust the amount of air flowing through the duct 7. By doing so, it is possible to automatically adjust the amount and temperature of the warm air blown out from the outlet at the foot of the occupant.

Further, a front heater 9 is provided near the instrument panel at the front end of the vehicle body 1 mainly for heating and taking in outside air near the driver's seat (including the passenger seat). The front heater 9
Also, a heater unit as a heat exchanger that heats the air that passes by circulating hot water (cooling water for the engine), a blower unit with a motor that can adjust the rotation speed, and a driver's seat near the suction port An outside air intake for sucking outside air in addition to the air in the space 8 and several air outlets as end openings of the duct are provided near the instrument panel.

The outlet from the front heater 9 has a center register or a side register capable of blowing air toward the vicinity of the driver's face, or a front register capable of blowing air upward along the inside of the windshield. There is a relatively upper outlet such as a defroster and a side defroster, and a relatively lower outlet which can blow air toward the driver's feet. 3 and the rear heater 6 into the passenger seat space 2 (these are referred to as "room modes"), that is, the space 8 near the driver's seat as in the ceiling blow mode, the foot blow mode, and the bi-level mode. The three types of blowing modes can be selected by the front heater 9 for the As de, "defrost mode" in order to prevent the formation of frost on the front glass (or "DE
F mode) and a foot defrost mode (or F / D mode). (These front-side blowing modes are referred to as "front modes.")

The air from the upper outlet (referred to as the ceiling side for convenience) and the lower outlet (referred to as the foot) near the driver's seat is:
Each of the control devices can open and close the damper so that the air can be blown out or stopped individually. When outside air is mixed into the blown air, the mixing ratio of the outside air can be adjusted stepwise. For that purpose, several dampers driven by an actuator such as a solenoid are provided in the middle of the duct of the front heater 9. Front heater 9 that blows out from ceiling and foot side outlets
The air volume of the air can be automatically adjusted by changing the rotation speed of the blower unit motor by the control device, and the temperature of the hot air can be adjusted by controlling the flow rate of the hot water supplied to the heater unit by an electromagnetic device also operated by the control device. It can be adjusted by changing it with a valve.

In order to detect the temperature of the space 2 near the driver's seat and the space 8 near the driver's seat, in the illustrated embodiment, the air inlet to the air conditioner unit 3 opened on the ceiling side of the space 8 near the driver's seat, ie, air A first inside air sensor 20 is mounted near the inlet duct 14, and a second inside air sensor 21 is mounted near the inlet of the rear heater 6 in the space 2 of the customer seat. First inside air sensor 20 and second inside air sensor 2
1 inputs the detected values to an electronic control device (not shown), and the control device controls the air conditioner unit 3, the rear heater 6,
And automatically controls the operation of the front heater 9.

Each of the first inside air sensor 20 and the second inside air sensor 21 is provided with a dedicated fan driven by a small motor so as not to form a stagnation of air in the surroundings. Can be detected, but when the air conditioner unit 3 or the rear heater 6 is automatically operated, a suction air flow is generated in those suction ports, and there is a danger that air will stagnate. Since the fan motor of the sensor 20 or 21 attached to the suction port is operated, the fan motor is automatically stopped by the control device.
It prevents unnecessary operation of the fan and increases the durability of the motor.

As described above, the vehicle body 1 of the bus of the illustrated embodiment
An air conditioner unit 3 having an outlet of a ceiling duct 5 and a rear heater 6 having an outlet of a
And three types of air conditioning units, a front heater 9 having a ceiling-side and a foot-side outlet, are provided. When all or a part of these units is automatically controlled, the first A bus-like signal is obtained by the detection value of only one of the inside air sensor 20 or the second inside air sensor 21 and, in other cases, by the detection values of both the first inside air sensor 20 and the second inside air sensor 21. An air conditioner of a vehicle having a large living space is automatically controlled and operated.

The following table shows the patterns of using the inside air sensors 20 and 21 selectively for the combination of the room mode of the passenger seat space 2 by the air conditioner unit 3 and the rear heater 6 and the front mode of the space 8 near the driver seat by the front heater 9. It is shown in FIG. The use of the inside air sensors 20 and 21 is selectively performed by a control device, which is classified into whether the air-conditioning control of the space 2 in the passenger seat and the space 8 in the vicinity of the driver's seat is automatically controlled (automatic) or manually controlled. In the case of manual control, the room mode is selected manually, but in the case of automatic control, the room mode is automatically determined by the control device according to the deviation between the detected temperature of each space and the set value. For example, it is set in advance as shown in Table 1 corresponding to each section of the front mode. The control device refers to a table such as Table 1 stored in the ROM of the control device according to the combination of the room mode and the front mode selected at that time, and detects only the detection value of the first inside air sensor 20. Alternatively, the first inside air sensor 20 and the second inside air sensor 2
The two detected values are selected and read into the CPU of the control device.

In Table 1, four frames arranged side by side are as follows:
The room mode which can be selected by the combination of the air conditioner unit 3 and the rear heater 6 is shown. These modes are automatically selected according to the magnitude of the temperature deviation YR when the air conditioner unit 3 and the rear heater 6 are operated under automatic control (automatic). That is, when the temperature of the passenger seat space 2 is significantly higher than the set temperature, the temperature deviation YR becomes a large positive value, the ceiling blowing mode is automatically selected, and only the air conditioner unit 3 is driven as a cooling device. And
When the temperature of the passenger seat space 2 is significantly lower than the set temperature, the temperature deviation YR becomes a large negative value, the foot blowing mode is automatically selected, and only the rear heater 6 is driven.
Warm air is blown out from the feet of the passengers to warm up. When the temperature of the passenger space 2 is relatively close to the set temperature, the bi-level mode is automatically selected, and both the air conditioner unit 3 and the rear heater 6 are driven at the same time. Depending on whether it is positive or negative, air at an appropriate temperature is blown from above and below, respectively, but the air volume is generally small. OFF means that the driving of both the air conditioner unit 3 and the rear heater 6 is stopped.

Further, six frames vertically arranged in Table 1 indicate front modes that can be selected in the front heater 9. The lower four may be considered in the same manner as in the above-described room mode. In the case of the automatic control operation, the magnitude of the deviation YF between the temperature of the space 8 near the driver's seat and the set temperature (whether positive or negative) is determined. ) Is automatically selected. OFF means that the operation of the front heater 9 is stopped. The upper two indicate a defrost mode (DEF) and a foot defrost mode (F / D) unique to the front mode. These can be manually selected only in the case of manual control of the front heater 9.

In the frame in Table 1, symbol 1 indicates the case where the detection value of the first inside air sensor 20 is used as a valid input signal of the control device, and symbol 2 indicates the second inside air sensor 2.
1 shows a case where a detected value of 1 is used as a valid input signal of the control device. The symbol 0 means that it is not necessary to use the detection values of the 1 or 2 sensors that should be at that position. In this case, the sensor described on the left side of the symbol / is used for control of the space 8 near the driver's seat on the front side, that is, the automatic control of the front heater 9, and the sensor described on the right side of the symbol / A sensor used for controlling the space 2 in the rear passenger seat, that is, for automatically controlling the air conditioner unit 3 and the rear heater 6 is shown. It should be noted that 1 (2) written to the right of the symbol / indicates that either sensor 1 or 2 is used. Table 1
In FIG. 7, the shaded portion in the frame indicates a combination area that can be realized by automatic control (automatic).

[0028]

[Table 1]

The bottom row of Table 1 shows that the front mode is OFF.
Therefore, the state in which the operation of the front heater 9 is stopped is shown in this case.
It is no longer necessary to use the detected value of 0 for control on the front side, and the warm air blown out of the front heater 9 is reduced to the first value.
The first inside air sensor 20 can be used for detecting the temperature of the space 2 in the customer seat because there is no possibility that the detection value of the inside air sensor 20 is affected. In this case, the temperature of the space 8 near the driver's seat is detected simultaneously with the temperature of the space 2 at the passenger seat.

The combination of the room mode being the ceiling blowing mode and the front mode being OFF is an operation state in which the air conditioner unit 3 is used as a cooling device. Therefore, the period of use mainly in summer is relatively long. ,
It is more advantageous to use the first inside air sensor 20 than to use the second inside air sensor 21 attached to the suction port of the rear heater 6 for detecting the temperature of the passenger seat space 2. Because the first inside air sensor 20 is attached to the suction port of the air conditioner unit 3, the first inside air sensor 20 can be operated without driving the fan motor for the sensor.
There is a suction air flow around the air conditioner, so that the air does not stagnate and the average temperature of the passenger seat space 2 can be accurately detected. On the other hand, the second heater is not operated because the rear heater 6 is not operated. This is because there is no suction airflow around the inside air sensor 21 and the air tends to stagnate, so that the temperature in the passenger seat space 2 cannot be accurately detected unless the fan motor of the sensor is driven. .

For the same reason, even if the room mode is the bi-level mode and the front mode is OFF, the sensor uses only the first inside air sensor 20 and the second
The sensor that does not use the inside air sensor 21 can be selected. However, in this case, since the room mode is the bi-level mode and the suction airflow exists at the suction port of the rear heater 6, the detection value of the first inside air sensor 20 is not used, and the second inside air sensor 21 is not used. Only the detected value may be used. In that sense, 0/1 (2) is described in the corresponding frame of Table 1.

Needless to say, when the room mode is the foot blowing mode and the front mode is OFF, the temperature of the space 2 in the passenger seat includes the temperature of the second indoor air including the temperature of the space 8 near the driver's seat. The detection is performed by using only the sensor 21, and the fan motor is naturally stopped by the control device without using the detection value of the first inside air sensor 20. In this case as well, since there is a suction airflow at the suction port of the rear heater 6, the second inside air sensor 2
There is no need to drive one fan motor.

As described above, in the front mode OFF state in which the operation of the front heater 9 is stopped, the first inside air sensor 20 is provided in any of the three room modes.
Alternatively, by using only one of the advantageous ones of the second inside air sensors 21 and deactivating the other, the driving time of the fan motor attached to the sensor is shortened, and the durability and reliability of the whole system are reduced. Can be increased.

The vertical column at the right end of Table 1 indicates that the room mode is O
Since this indicates the state of the FF, the air conditioner unit 3 and the rear heater 6 on the side of the space 2 of the customer seat are not operated. In this state, when only the front heater 9 on the side of the space 8 near the driver's seat is operated by automatic control, the control is performed only by the detection value of the first inside air sensor 20 in all three front modes, and Since the inside air sensor 21 is not used, its fan motor is stopped by the control device.

Although there is some overlap with the above description,
FIG. 3 summarizes the basic control procedure in the vehicle air conditioner of the present invention. These controls are executed by, for example, an electronic control device (not shown) housed inside the instrument panel in the driver's seat. Needless to say, the three air-conditioning units, that is, the air-conditioning unit 3, the rear heater 6, and the front heater 9 can all be manually operated manually. When "auto" is selected on the instrument panel to automatically control and operate the rear heater 6, one of the first inside air sensor 20 and the second inside air sensor 21 is selected according to Table 1 as described above. The detected value of the sensor is read into the CPU of the control device, and a deviation YR between the detected value and a preset temperature is calculated.
One of the three room modes is automatically selected according to the magnitude (including positive and negative) of the deviation YR. And
In order to make the temperature deviation YR zero, the air volume and temperature of the air to be blown out from the air conditioner unit 3 or the rear heater 6 are calculated in the control device, and a control signal is output to each air conditioner unit to drive them. Will be.

In the same manner, the front heater 9 can be automatically controlled in the space 8 near the driver's seat. In this case, as shown in the lower part of FIG. 3, the detection value of the first inside air sensor 20 is read into the CPU of the control device as a valid input signal. The control device calculates the deviation YF between the signal and the set temperature, thereby automatically selecting the blowing mode of the front heater 9, calculating the air volume and temperature of the air to be blown, and driving the front heater 9. Will be. The set temperature in this case may be the same value as the set temperature for calculating the temperature deviation YR, but is a value obtained by uniformly adding a constant value such as 2 ° C. to the set temperature. You may.

If, for example, the operation of the stopped front heater 9 is manually started in the state where the room mode is the ceiling blow mode, the temperature of the space 2 in the customer seat is detected until then. The first inside air sensor 20 that has been used to detect the temperature of the space 8 near the driver's seat is used instead, and the second inside air sensor 21 is used instead of the second inside air sensor 21 for the space 2 in the customer seat. However, if such sensor switching is performed immediately, the automatic mode selection by the control device may fall into an unstable hunting state. This is because even when the fan motor of the second inside air sensor 21 starts to rotate, it cannot immediately detect the average value of the temperature of the air in the space 2 of the customer seat. Therefore, it may be better to switch the sensors after a slight time delay after the switching of the blowing mode.

[0038]

According to the present invention, even if the living space is large, such as a bus, and there is no partition between the space for the passenger seat and the space near the driver's seat, one or two inside air sensors can be used for both. It is possible to automatically control the air conditioner in the space substantially independently, and by selecting and using advantageous sensors, the number of sensors actually used is reduced, and accordingly the number of sensors is reduced. The failure time can be avoided by minimizing the driving time of the fan motor.
As a result, the air conditioner on the rear side and the air conditioner on the front side can be automatically controlled independently of each other by simple means as much as possible. Can be operated by automatic control without human intervention, and not only can the majority of occupants and drivers always have a comfortable atmosphere, but also the durability of sensors and the reliability of the entire system can be improved. Can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a bus schematically illustrating an embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing a part of FIG. 1;

FIG. 3 is a block diagram schematically showing a control procedure.

FIG. 4 is a sectional view of a bus schematically illustrating a conventional example.

FIG. 5 is a sectional view of a bus schematically showing another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Bus body 2 ... Space of passenger seat 2 3 ... Air-conditioning unit 5 ... Ceiling duct 6 ... Rear heater 7 ... Foot duct 8 ... Space near driver's seat 9 ... Front heater 10 ... Room inside air sensor 11 ... Front inside air sensor 12 ... 13: evaporator 14: air inlet duct 15: blower 18: reheat core 20: first inside air sensor 21: second inside air sensor

Continuing on the front page (72) Inventor Masahiro Mohri 1-1-1, Showa-cho, Kariya-shi, Aichi, Japan Inside Denso Co., Ltd. ) Inventor Yuki Kato 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (72) Inventor Ritsubun 1 Toyota Town Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (72) Inventor Koji Yamamoto Aichi 25, Kamifujiike, Yoshiwara-cho, Toyota-shi, Araco Co., Ltd. (56) References JP-A-59-23723 (JP, A) JP-A-56-7510 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B60H 1/00 102 B60H 1/00 101

Claims (3)

(57) [Scope of request for utility model registration] [Claim 1 further comprising at least cooling capacity, are housed in the front ceiling of the vehicles provided to the suction port is the front ceiling of the room air, it is possible to blow air from above the rear seats An air conditioner unit, a rear heater capable of blowing air from below the rear seat, and a front heater capable of blowing air from upper and lower outlets to a space near a driver's seat at a front end of the vehicle. A first inside air sensor attached near the suction port to the air conditioner unit above the space near the driver's seat;
A second mounted in the space where the rear seat is located
And a control device that can automatically control and operate the air conditioner unit, the rear heater, and the front heater based on the detection values of the two inside air sensors, and the control device is configured to perform the control when the front heater is not operated. An air conditioner for a vehicle, wherein a detected value of only one of the first inside air sensor and the second inside air sensor is used for control. Wherein at least cooling capacity, are housed in the front ceiling of the vehicles provided to the suction port is the front ceiling of the room air, it is possible to blow air from above the rear seats An air conditioner unit, a rear heater capable of blowing air from below the rear seat, and a front heater capable of blowing air from upper and lower outlets to a space near a driver's seat at a front end of the vehicle. A first inside air sensor attached near the suction port to the air conditioner unit above the space near the driver's seat;
A second mounted in the space where the rear seat is located
And a control device that can automatically control and operate the air conditioner unit, the rear heater, and the front heater based on the detection values of the two inside air sensors. The second inside air sensor is located near the suction port of the rear heater. When the rear heater is stopped ,
And a configuration in which the detected value of the first inside air sensor is used for control during operation of the air conditioner unit.
An air conditioner for a vehicle. 3. The first inside air sensor and the second inside air sensor are each provided with a fan motor, and the inside air not using a detected value among the first inside air sensor and the second inside air sensor. air-conditioning system according to claim 1 or 2, characterized in that it is configured to stop the fan motor, which is attached to the sensor.