JP3006038B2 - Vehicle air conditioner - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an air conditioner for a vehicle.

[Prior art] Conventionally, in an air conditioner mounted on a bus vehicle,
For example, there is a system in which a plurality of cooling units are appropriately dispersed and arranged on both shoulders of a ceiling, and the temperature in the vehicle is independently adjusted for each area in accordance with the cooling units.

The temperature adjustment is automatically controlled according to the detected temperature of the inside air temperature sensor installed in each area so that the temperature becomes the set temperature set on the control panel of the driver's seat.

[Problem to be Solved by the Invention] However, in the above system, the temperature inside the vehicle in each area corresponding to the cooling unit is uniformly controlled to the set temperature set on the control panel. However, even in a case where it does not fit the feeling of a passenger sitting in a specific area, the set temperature cannot be easily adjusted only in that specific area.

The present invention has been made based on the above circumstances, and an object of the present invention is to set a target temperature for the entire vehicle interior and then adjust the set temperature within a predetermined temperature range for each area in the vehicle. It is to provide a device.

[Means for Solving the Problems] (Means of Claim 1) A cooling unit including a refrigerant evaporator for cooling air and a cooling blower for blowing air cooled by the refrigerant evaporator into a vehicle is provided. Then, in a vehicle air conditioner in which each of the cooling units is installed in each section of the vehicle, an inside air temperature detecting means capable of detecting the inside temperature of each section and a target temperature of the entire inside of the car are set. A set temperature varying means for varying a set temperature within a predetermined temperature range for each of the sections; and the cooling blower such that a detected temperature of the inside air temperature detecting means becomes a temperature set by the set temperature varying means. And a control means for controlling the air blowing capacity.

(Means of Claim 2) The heating unit comprises a heating unit provided with a hot water heat exchanger for heating air, and a heating blower for blowing air heated by the hot water heat exchanger into the vehicle. In the vehicle air conditioner installed in each section in the vehicle, inside air temperature detection means capable of detecting the temperature inside the vehicle in each section, after the target temperature of the entire interior of the vehicle is set, the set temperature A set temperature variable unit that varies within a predetermined temperature range for each area; and controls a blowing capacity of the heating blower such that a detected temperature of the inside air temperature detecting unit becomes a temperature set by the set temperature variable unit. And technical means for providing the control means.

[Operation and Effect of the Invention] In the present invention described in claim 1, after the target temperature of the entire vehicle interior is set, the set temperature can be changed within a predetermined temperature range for each zone in the vehicle. it can. In this case, when the temperature in a certain area is changed by the set temperature varying means with respect to the set temperature of the entire interior of the vehicle, the blowing capacity of a cooling blower provided in the certain area is controlled, and the air in the certain area is controlled. The temperature inside the vehicle is adjusted to the changed temperature.

Further, in the present invention described in claim 2, similarly to the case of claim 1, when the temperature of a certain area is changed by the set temperature variable means with respect to the set temperature of the entire interior of the vehicle, the temperature is provided in the certain area. The blowing capacity of the heating blower is controlled, and the temperature inside the vehicle in the certain area is adjusted to the changed temperature.

Thus, when the set temperature of the entire interior of the vehicle does not match the air conditioning feeling of a passenger sitting in a certain area of the vehicle, the set temperature is changed only in that certain area, so that the in-vehicle temperature of the certain area is changed. Can be approached to the passenger's air conditioning feeling.

According to the present invention, even after the target temperature of the entire vehicle is set, the set temperature is changed within a predetermined temperature range only in a specific area of the vehicle, and the set temperature is maintained in other areas, or By changing the preset temperature set in each of the sections within the predetermined temperature range, the air conditioning feeling of all the passengers can be kept more comfortable.

Embodiment Next, a vehicle air conditioner of the present invention applied to a bus vehicle will be described based on an embodiment shown in the drawings.

FIG. 1 is a perspective view of a bus vehicle 1 equipped with an air conditioner.

The air conditioner of this embodiment includes a heating device including a hot water circuit (see FIG. 2) 2 for circulating engine cooling water, and a cooling device including a refrigeration cycle (see FIG. 4) 3.

As shown in FIG. 2, the hot water circuit 2 includes a defroster heater 4 installed at the front of the driver's seat and four heater cores 5 for heating the inside of the vehicle, and a water jacket (not shown) of the engine 6. Are connected in series by a hot-water pipe 7 connected to the respective sections. The heater core 5 is a hot-water heat exchanger of the present invention for exchanging heat between engine cooling water (hot water) supplied through the hot-water pipe 7 and surrounding air.

As shown in FIG. 1, the heating device includes four sets of heater units 8 (heating units of the present invention) installed on the floor of the bus vehicle 1 and the hot air supplied from these heater units 8 in the vehicle. A hot air duct 9 for blowing out the air.

As shown in FIG. 3, the heater unit 8 includes a unit case 10 communicating with the hot air duct 9, a heater core 5 housed in the unit case 10, and an air mix damper.
11 and a blower 12 (heating blower of the present invention).

The air mix damper 11 changes the ratio between the amount of air passing through the heater core 5 and the amount of air bypassing the heater core 5 in accordance with the degree of opening.
Driven by The amount of current supplied to the servo motor 13 is controlled by a control circuit 14 (see FIG. 8) described later.

The hot air duct 9 is disposed on the floor on both left and right sides of the bus vehicle 1 so as to extend in the front-rear direction, and the hot air duct 9 is provided with a plurality of hot air outlets 9a that open toward the feet of passengers as appropriate. Have been.

The cooling device includes two sets of refrigeration cycles 3 mounted to independently cool the right side and the left side of the bus vehicle 1.
And a cool air duct 15 for blowing cool air into the vehicle.

As shown in FIG. 4, each refrigeration cycle 3 includes a refrigerant compressor 16, a refrigerant condenser 17, a receiver 18, four expansion valves 19,
Each of the refrigerant evaporators 20 is composed of functional components, and is connected by a refrigerant pipe 21.

The refrigerant condenser 17 is installed under the floor of the bus vehicle 1 as a condensing unit 23 together with the condenser fan 22. Each refrigerant evaporator 20 is connected to the cooling unit 25 together with the evaporator fan 24 (the cooling blower of the present invention). The cooling unit of the present invention is installed on the shoulder of the ceiling of the bus vehicle 1.

As shown in FIG. 5, the cooling unit 25 includes a unit case 26 communicating with the cold air duct 15, a refrigerant evaporator 20 housed in the unit case 26, and two blowers 1
2, and an inside / outside air switching damper 27. An inside air inlet 26a and an outside air inlet 26b are formed in the unit case 26, and either one of the inlets 26a or 26b is closed by the inside / outside air switching damper 27.

A total of eight cooling units 25 are provided on each of the left and right sides of the bus vehicle 1, four each.

The cool air ducts 15 are arranged extending in the front-rear direction on the left and right ceiling shoulders of the bus vehicle 1. The cool air ducts 15 have a plurality of cool air outlets (not shown) that open toward the passenger's head. Are provided as appropriate.

In this air conditioner, a preset operation mode of the cooling and heating operation is automatically set via the control circuit 14 by setting the room temperature with a control panel (see FIG. 6) 28 installed in the driver's seat. Selected.

As shown in FIG. 6, the control panel 28 includes a display unit 29 and an operation unit 30. The display unit 29 has a digital display of the set temperature set by the operation unit 30, a display of the inside / outside air mode, and A display of a blowing mode and the like are provided.

The operation unit 30 includes an air conditioner switch 31, a set temperature switch 32, an inside / outside air changeover switch 33, and the like.
(See FIG. 7), the four control volumes 34 to 34 that vary the set temperature for each zone
37 (set temperature changing means of the present invention) is provided. The control volumes 34 to 37 are provided corresponding to the zones A to D, respectively, and can be operated to the “COOL” side or the “HOT” side even after the target temperature of the whole vehicle is set. The set temperature can be changed within a predetermined temperature range for each zone.

Here, the operation of the control circuit 14 will be described based on the electric circuit diagram shown in FIG.

The control circuit 14 operates by turning on the air conditioner switch 31 using the vehicle-mounted battery 38 as a power source, and sets the internal temperature thermistors 39 to 42 provided for each of the zones A to D, a set temperature thermistor 43 for setting the temperature inside the vehicle, And each adjusting volume 34-37 connected in series with each internal temperature thermistor 39-42
The operation mode in each of the zones A to D is determined using the combined resistance value of the above as an input signal.

That is, in the heating mode, while controlling the amount of electricity of each servo motor 13, according to the selected operation mode,
The amount of air blown by each blower 12 is controlled.

In the cooling mode, each of the power transistors 44 to 47
, The number of revolutions of the evaporator fan 24 is controlled for each of the zones A to D.

 Next, the operation of the present embodiment will be described.

If the set temperature of the entire vehicle does not match the passenger's feeling in the A zone, for example, the control volume of the control panel 28 corresponding to the A zone is set to the “COOL” side.
Or, operate the "HOT" side. As a result, the resistance value of the adjustment volume 34 changes, and the combined resistance value of the inside temperature thermistor 39 of the A zone and the adjustment volume 34 changes.

At this time, for example, if the operation mode selected by the set temperature is the heating mode, the operation mode is determined according to the change in the combined resistance value, and the air flow rate of the blower 12 and the opening of the air mix damper 11 are adjusted. You. As a result, the set temperature of only the zone A is changed to the “COOL” side or the “HOT” side, and the other zones (B to D) are maintained at the set temperature.

On the other hand, if the operation mode is the cooling mode, the rotation speed of the evaporator fan 24 is controlled, and the set temperature is set to the “COOL” side or “HO” only in the A zone, as in the heating mode.
The zone is changed to “T”, and the other zones (B to D) are maintained at the set temperature.

When the main switch (not shown) of the engine 6 is turned off while the control knobs 34 to 37 are operated, it is possible to set so that the temperature is automatically controlled to the set temperature set on the control panel 28. it can.

As described above, by operating the adjustment volumes 34 to 37 not only in the zone A but also in each of the zones A to D, even after the target temperature of the entire interior of the vehicle is set, it is set independently for each zone. The temperature can be changed within a predetermined temperature range.

Accordingly, even when the set temperature of the entire interior of the vehicle does not match the feeling of a passenger sitting in a specific zone, the set temperature can be easily changed only in that specific zone, so that the passenger's feeling with respect to the internal temperature of the vehicle can be reduced. It can be maintained more comfortably.

In this embodiment, the control volumes 28 to 37 are provided on the control panel 28 of the driver's seat.
As shown in FIG. 10, an adjustment panel 49 provided with an adjustment lever or an adjustment button (set temperature changing means) 48 is installed in each of the zones A to D, and a passenger sitting in each zone directly adjusts. The lever 48 may be made operable. In FIGS. 9 and 10, the adjusting lever 48 is set to “AU”.
When set to the "TO" position, the temperature is automatically controlled to the set temperature set on the control panel 28.

Also, an example is shown in which the image is divided into four zones A to D.
It is not limited to zones.

According to the room temperature set on the control panel 28,
Although the auto air conditioner automatically selects the operation mode of the cooling / heating operation, the present invention can be applied to only one of the cooling device and the heating device.

Although the present invention has been applied to a bus vehicle, the present invention may be applied to other vehicles such as a railway vehicle and an ordinary passenger car.

[Brief description of the drawings]

1 to 8 show one embodiment of the present invention.
1 is a perspective view of a bus vehicle, FIG. 2 is a hot water circuit diagram of an air conditioner, FIG. 3 is a perspective view of a heater unit, FIG. 4 is a refrigeration cycle diagram of the air conditioner, and FIG. 6, FIG. 6 is a front view of a control panel, FIG. 7 is an explanatory diagram in the case where the inside of a bus is divided into four zones, and FIG. 8 is an electric circuit diagram of the present embodiment. 9 and 10 show a modification of the present embodiment, and are front views of the adjustment panel. In the figure, 5: heater core (hot water heat exchanger) 8: heater unit (heating unit) 12: blower (heating blower) 14: control circuit (control means) 20: refrigerant evaporator 24: evaporation Skill fan (cooling blower) 25 Cooling unit (cooling unit) 34-37 Adjustment volume (set temperature variable means) 39-42 Internal temperature thermistor (inside air temperature detection means) 48 Adjustment lever (setting Temperature variable means)

Claims (2)

(57) [Claims] 1. A cooling unit having a refrigerant evaporator for cooling air and a cooling blower for blowing air cooled by the refrigerant evaporator into a vehicle, wherein the cooling unit is provided for each zone in the vehicle. In the air conditioner for a vehicle installed in each, in the inside air temperature detecting means capable of detecting the temperature inside the vehicle for each section, after the target temperature of the entire interior of the vehicle is set, the set temperature is set to a predetermined temperature for each area Set temperature variable means that changes within a range; andcontrol means that controls the blowing capacity of the cooling blower so that the detected temperature of the inside air temperature detecting means becomes the temperature set by the set temperature variable means. Vehicle air conditioner. 2. A heating unit having a hot water heat exchanger for heating air, and a heating blower for blowing air heated by the hot water heat exchanger into a vehicle, wherein the heating unit is provided inside the vehicle. In the air conditioner for a vehicle installed in each of the sections, inside air temperature detecting means capable of detecting the inside temperature of each section, and after the target temperature of the entire inside of the car is set, the set temperature is set in each of the sections. A set temperature variable unit that varies within a predetermined temperature range, and a control that controls a blowing capacity of the heating blower such that a detected temperature of the inside air temperature detecting unit becomes a temperature set by the set temperature variable unit. A vehicle air conditioner comprising: