JPH06255339A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To provide an air conditioner for a vehicle which is constituted so that a blow-cut port on an assistant driver's seat side is closed and warm or cool air is supplied conentrically to a driver's seat side, when no person is present on the assistant driver's seat side, in particular when the warming or cooling faculty is short. CONSTITUTION:An assistant driver's seat side sensor judges if a person is present on an assistant driver's seat or not, and if no person is present on the assistant driver's seat, an opening/closing valve 33 on a foot side on the assistant driver's seat side is closed by an actuator 34 on the start of warming or cooling, or an opening/closing valve 27 at the blow-out port 26 on a face side on the assistant driver's seat aide is closed by an actuator 28.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner,
In particular, the present invention relates to a vehicle air conditioner in which air outlets are provided in front of a driver's seat and in front of a passenger seat, respectively, and hot air or cold air is blown from these air outlets to perform heating or cooling.

[0002]

2. Description of the Related Art In a vehicle, an air conditioner for a vehicle is provided which is a combination of a blower, a cooler unit and a heater unit, and such an air conditioner is provided on an instrument panel by a duct. It is connected to an air outlet and blows hot air or cold air from the air outlet to heat and cool the interior of the vehicle interior, respectively. With such an air conditioner, it becomes possible to maintain an optimal atmosphere inside the vehicle.

[0003]

The cab of the truck is also provided with the vehicle air conditioner as described above. With such an air conditioner, warm air or cold air is blown from the air outlets provided in front of the driver's seat and in front of the passenger's seat to perform heating or cooling. However, in the case of trucks in general, most people use a one-man ride, and although there are people in the driver's seat, there are many cases in which no passenger is in the passenger seat. However, regardless of whether there was a person in the passenger seat, hot air or cold air was constantly blowing out from the air outlet in front of the passenger seat.

In a truck equipped with such an air conditioner, a feeling of warming or cooling cannot be obtained until the temperature in the vehicle compartment rises or falls, particularly at the start of heating or cooling. Also, since a considerable amount of warm air or cold air was blowing out from the passenger side, the temperature of the blown out warm air was low, or the temperature of the cold air was high, making it difficult to obtain passenger satisfaction. . In order to eliminate such an inconvenience, the engine has been idle-up, but the idle-up has a drawback that leads to deterioration of fuel efficiency.

The present invention has been made in view of the above problems, and it is an air conditioner for a vehicle that can provide a feeling of heating / cooling at the start of heating or cooling without performing excessive idle-up of the engine. The purpose is to provide a device.

[0006]

According to the present invention, air outlets are provided in front of a driver's seat and in front of a passenger seat, respectively, and hot air or cold air is blown out from these air outlets for heating or cooling. In a vehicle air conditioner, an interpersonal sensor that detects whether or not there is a passenger in the passenger seat, and a valve that closes the outlet on the passenger seat side are provided, and when there is no person in the passenger seat at the start of heating or cooling, Relates to a vehicle air conditioner characterized in that the air outlet on the passenger side is closed by the valve.

[0007]

[Function] At the start of heating or cooling, the presence or absence of a person is detected by the interpersonal sensor. When there is no person, the air outlet on the passenger side is closed by the valve. Therefore, warm air or cold air is intensively blown out from the air outlet on the front side of the driver's seat, and sufficient warmth is maintained even while the temperature inside the vehicle cabin rises or falls to a predetermined temperature. It becomes possible to obtain a feeling of cooling.

[0008]

1 shows a vehicle air conditioner according to an embodiment of the present invention, and this vehicle air conditioner includes a supply duct 10. The duct 10 is provided with a blower 11, and a cooler unit 12 including an evaporator is provided downstream of the blower 11. A heater unit 13 is provided on the downstream side of the evaporator 12, and the heater unit 13 is provided.
A temperature control valve 14 that adjusts the amount of air passing through the inside is provided on the side of the heater unit 13. The opening / closing of the temperature control valve 14 is controlled by an actuator 15.

A face side duct 17 extending upward and a foot side duct 18 extending downward are respectively connected to the outlet side of the supply side duct 10. A partition plate 19 is provided at an intermediate portion between the ducts 17 and 18, and a vertical switching valve 2 is provided at a tip end portion of the partition plate 19.
0 is provided. The rotational position of the up / down switching valve 20 is controlled by an actuator 21.

A driver seat side air outlet 24, an intermediate air outlet 25, and a passenger seat side air outlet 26 are provided at the tip of the face side duct 17, respectively. An opening / closing valve 27 for opening and closing the passenger seat side outlet 26 is attached. The opening / closing valve 27 is controlled to be opened / closed by an actuator 28.

On the other hand, a driver seat side air outlet 31 and a passenger seat side air outlet 32 are provided at the tip end side of the foot side duct 18. An opening / closing valve 33 is provided at the passenger seat side outlet 32, and the opening / closing valve 33 is controlled to be opened / closed by an actuator 34.

Next, the control system of such a vehicle air conditioner will be described. As shown in FIG. 2, this control system includes an auto controller 40. The auto controller 40 includes an outside air temperature sensor 41 that detects an outside air temperature, an insolation sensor 42 that detects insolation, an inside air temperature sensor 43 that detects a temperature inside a vehicle, a water temperature sensor 44 that detects a water temperature of engine cooling water, and Vehicle air conditioner cooler unit 12
A temperature sensor 45 for detecting the temperature on the downstream side of each is provided.

A compressor 47 for compressing the refrigerant circulating in the evaporator 12, a control panel 48, various actuators 49, and a blower motor 50 for driving the blower 11 are connected to the automatic air conditioner 40. Further, a passenger seat side interpersonal sensor 51 is connected to the auto air conditioner 40. The interpersonal sensor 51 is a sensor that detects whether or not there is a person in the passenger seat.

The auto air conditioner controller 40 is connected to the actuator 28 of the opening / closing valve 27 of the face outlet 26 on the passenger side and the actuator 34 of the foot outlet opening / closing valve 33 on the passenger side.

In the above-mentioned structure, since the heat source for heating is obtained by the heater unit 13, the controller 40 shown in FIG. 2 drives the blower motor 50 to rotate the blower 11. Then, the wind supplied by the blower 11 is heated when passing through the heater unit 13, and is supplied to the face side duct 17 and the foot side duct 18. At this time, the cooler unit 12
Is stopped. Further, the opening / closing of the temperature control valve 14 is controlled by the actuator 15, and the heater unit 1
Adjust the amount of air passing through 3. In addition, the actuator 21
By controlling the rotation angle of the up / down switching valve 20, the ratio of the amount of air supplied to each of the face side duct 17 and the foot side duct 18 is adjusted.

The warm air supplied to the face side duct 17 is blown out from the driver seat side air outlet 24, the intermediate air outlet 25, and the passenger seat side air outlet 26, respectively. With respect to the passenger seat side outlet 26, the opening / closing valve 27 is controlled to be opened / closed by the actuator 28, so that the blowout from the outlet 26 can be performed or stopped. Further, the warm air supplied to the foot side duct 18 is ejected from the driver seat side air outlet 31 and the passenger seat side air outlet 32, respectively. The blowing of warm air from the passenger seat side outlet 32 is controlled by the actuator 34 to open / close the valve 33.
It is controlled by opening and closing.

Next, when the vehicle interior is cooled by the vehicle air conditioner, the cooler unit 12 is driven instead of the heater unit 13. The air sent from the blower 11 is cooled by the cooler unit 12 and supplied to the face side duct 17. At this time, the opening / closing valve 14 is rotated by the actuator 15 as shown by the chain line in FIG. 1, and the cooling air is adjusted so as not to pass through the inside of the heater unit 13. Further, the on-off valve 20 is rotated by the actuator 21 as shown by the chain line to close the inlet of the foot side duct 18.

Next, the control of the opening / closing valve 27 for opening / closing the passenger seat outlet 26 on the face side and the control of the opening / closing valve 33 for opening / closing the foot side outlet 32 will be described with reference to the flow charts shown in FIGS. 3 shows the overall control, and FIG. 4 shows a subroutine for opening the opening / closing valve 33 of the foot side outlet 32. FIG. 5 is a subroutine showing the closing operation of the on-off valve 33. FIG. 6 shows the blower outlet 26 on the passenger side.
8 is a subroutine showing an opening operation of the opening / closing valve 27. FIG. 7 shows a subroutine showing an operation of closing the opening / closing valve 27.

The variables and constants are set as follows:

[0020] T _o: required outlet temperature T _r: indoor temperature T _e: cooler unit downstream temperature sensor detected temperature to F: Constant FA: passenger seat side face outlet opening flag FO: passenger seat side foot outlet opening Flag As shown in FIG. 3, when the passenger side anti-person sensor 51 connected to the automatic air conditioner controller 40 detects that there is a person on the passenger side, the opening / closing of the foot side is performed according to the subroutine shown in FIG. The valve 33 is opened, and then the opening / closing valve 27 on the face side is opened according to the subroutine shown in FIG. Therefore, in this case, the three outlets 24, 25, 26 of the face side duct 17 and the foot side duct 18 are provided.
Hot air or cold air is blown from the two air outlets 31 and 32, respectively.

When the person sensor 51 detects that there is no person on the passenger side, T _o is compared with T _r . When the difference between the two is larger than A, it is determined that the heating capacity is insufficient, and the subroutine shown in FIG. 5 is executed to close the foot side opening / closing valve 33. As a result, the air volume of the driver side air outlets 24 and 31 is increased, and the heating performance around the driver's seat is improved.

Next, even if the difference between T _o and T _r is smaller than A, if T _o is larger than B and T _w is smaller than C, it is judged that the heating capacity is insufficient and T _o and T _r
By performing the same control as when the difference between and is larger than A and closing the opening / closing valve 33, the amount of air from the outlets 24 and 31 is increased and the heating performance is improved.

When the above conditions are not satisfied, the foot side opening / closing valve 33 is opened according to the subroutine shown in FIG. Then, when T _r and T _o are compared with each other, and when the ratio of both is larger than D, it is determined that the cooling capacity during cooling is insufficient, and the face side is determined by the subroutine shown in FIG. The opening / closing valve 27 of the outlet 26 on the passenger side is closed. The ratio of T _r and T _o is D
If T _o is lower than E and T _e is higher than F, it is judged that the cooling capacity is insufficient, and the subroutine shown in FIG. The opening / closing valve 27 of the air outlet 26 on the face side is closed. If the above conditions are not met,
The opening / closing valve 27 on the passenger side and the face side is opened by the subroutine shown in FIG.

By such control operation, when the room temperature approaches the set temperature or when the engine speed increases and the heating performance or the cooling performance has a surplus,
It will shift to the control of the normal auto air conditioner.

As described above, according to the vehicle air conditioner of this embodiment, when there is no person in the passenger seat, the passenger seat side is warmed up while the heating capacity is insufficient. Therefore, the air outlet 32 on the foot side is closed by the opening / closing valve 33. Further, when there is no passenger on the passenger side and it is determined that the cooling capacity is insufficient during the cool down, the opening / closing valve 27 of the blower outlet 26 on the passenger side is closed. As a result, the air volume on the driver's side is increased, or the temperature of warm air at the air outlet on the driver's side is raised and the temperature of cold air is lowered.

Therefore, it becomes possible to feel that the air conditioning on the driver's side is quickly performed. In addition, zone air conditioning that centrally heats or cools the driver's seat side becomes possible. Such an air conditioner is particularly an air conditioner for a cab of a truck, and is suitable for use in a large or medium-sized truck having a high one-man riding ratio.

[0027]

As described above, according to the present invention, when there is no person in the passenger seat at the start of heating or cooling, the above-mentioned air outlet is closed by a valve that closes the air outlet on the passenger seat side. . Therefore, warm air or cold air is intensively blown out from the driver's seat side, warm-up or cool-down can be performed quickly, and zone air conditioning on the driver's seat side is possible.

[Brief description of drawings]

FIG. 1 is a piping diagram of a vehicle air conditioner according to an embodiment.

FIG. 2 is a block diagram showing a control circuit of an air conditioner.

FIG. 3 is a flowchart showing a control operation.

FIG. 4 is a flowchart showing a control operation.

FIG. 5 is a flowchart showing a control operation.

FIG. 6 is a flowchart showing a control operation.

FIG. 7 is a flowchart showing a control operation.

[Explanation of symbols]

 10 Supply Side Duct 11 Blower 12 Cooler Unit (Evaporator) 13 Heater Unit 14 Temperature Control Valve 15 Actuator 17 Face Side Duct 18 Foot Side Duct 19 Partition Plate 20 Up / Down Switching Valve 21 Actuator 24 Driver Side Blowing Out 25 Intermediate Blowing 26 26 Assistant Seat side air outlet 27 Open / close valve 28 Actuator 31 Driver side air outlet 32 Front passenger side air outlet 33 Open / close valve 34 Actuator 40 Auto air conditioner controller 41 Outside air temperature sensor 42 Solar radiation sensor 43 Inside air temperature sensor 44 Water temperature sensor 45 Cooler unit downstream temperature Sensor 47 Compressor 48 Control panel 49 Each actuator 50 Blower motor 51 Passenger side interpersonal sensor

Claims (1)

[Claims] 1. An air conditioner for a vehicle, comprising air outlets in front of a driver's seat and in front of a passenger's seat, respectively, for heating or cooling by blowing hot air or cold air from these air outlets. It is equipped with an interpersonal sensor that detects whether or not there is a person in the passenger seat, and a valve that closes the outlet on the passenger seat side. A vehicle air conditioner characterized in that the air outlet is closed.