JPS63121518A - Air conditioning equipment for vehicle - Google Patents

Abstract

PURPOSE:To eliminate the need of an air blower exclusively used for ventilating purpose so as to improve the ventilating efficiency by introducting the open air by means of at least one air blower and using other air blowers to discharge the air in the interior of a vehicle, in the air conditioning equipment stated in the above title consisting of a plural number of air blower provided on the upstream from a heat exchanger. CONSTITUTION:When a controlling device indicates the open air introduction in response to an operating mode, an introduction hole switchover damper 10 plugs up an interior air introduction hole 9 and opens an open air intake duct 8 located at the upstream from the interior air introduction hole 9. Simultaneously with the above, a discharge opening switchover damper 15 opens an exhaust duct 14 and plugs up an interior air supply hole 13. An air blower 6 inhales the open air from the open air intake duct 8, delivers it to the upstream from a refrigerant evaporator 5, blows it out from cool air ducts 20 and 21 to the interior and cools the vehicle interior. On the other hand, an air blower 7 inhales the interior air through an interior air inflowing hole 17 and discharges it to the outside of a vehicle through the exhaust duct 14. The open air inhaling efficiency can be improved by this constitution without using any air blowers exclusively used for ventilating purpose.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a vehicle air conditioner that includes a plurality of blowers upstream of a heat exchanger that supplies air outside the vehicle interior into the vehicle interior.

[Prior Art] A vehicle air conditioner generally includes an outside air introduction means for selectively introducing air outside the vehicle interior (outside air) into the vehicle interior, and the outside air is introduced into the vehicle interior according to the operating mode of the vehicle air conditioner. has been introduced.

However, the interior of vehicles such as buses and railroad cars is extremely airtight, so when outside air is supplied into the cabin through the vehicle air conditioner, the pressure inside the cabin increases, causing Inhalation efficiency decreases.

Therefore, in the past, an exhaust port was installed in a part of the vehicle to evacuate the air inside the vehicle (inside air) by increasing the pressure inside the vehicle.
Alternatively, a dedicated ventilation fan was installed to release inside air outside the cabin, and this blower was used to force the inside air out, lowering the air pressure inside the cabin and improving the efficiency of outside air intake.

[Problems to be Solved by the Invention] However, when a vehicle is provided with a blower mII exclusively for ventilation, it is necessary to find a space in a narrow vehicle space to install the blower exclusively for ventilation, which poses the problem that vehicle mountability is extremely poor. In addition, since the vehicle was equipped with a blower exclusively for ventilation, the manufacturing cost of the vehicle increased.

In addition, when installing an exhaust port in a vehicle, the airtightness of the interior of the vehicle is reduced, and the internal pressure inside the vehicle is higher than when a vehicle is equipped with a dedicated ventilation fan. The problem is that the intake efficiency of outside air is lower than when installed in a vehicle.

The present invention has been made in view of the above circumstances, and its purpose is to improve the efficiency of intake of outside air by forcibly exhausting inside air to the outside when outside air is introduced, without installing a dedicated ventilation fan in the vehicle. An object of the present invention is to provide a vehicle air conditioner that can perform

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an air conditioner Ha equipped with a plurality of blowers that generate airflow toward the interior of the vehicle, at least one of the plurality of blowers. Technical means are provided in such a way that when one blower introduces air from outside the vehicle into the passenger compartment, one of the other blowers (with one blower) exhausts the air from the passenger compartment to the outside of the vehicle. shall be.

[Operation and Effects of the Invention] When at least one of the plurality of blowers introduces outside air into the vehicle interior through the heat exchanger, the outside air is introduced into the vehicle interior and acts to increase the air pressure inside the vehicle interior. .

At this time, at least one of the other blowers exhausts the inside air to the outside of the vehicle, so that the inside air is exhausted to the outside of the vehicle and the air pressure inside the vehicle is reduced.

As a result, when outside air is introduced, there is a dedicated exhaust air supply! It is possible to improve the efficiency of intake of outside air by the air conditioner without providing a lal.

In addition, since it does not require mounting space unlike a Jill dedicated to exhaust, it is easy to mount on a vehicle.

Furthermore, since some of the multiple blowers of the air conditioner are used for exhausting air inside the vehicle interior, costs can be kept low compared to installing a conventional blower exclusively for exhaust.

[Example] Next, an example in which the present invention is applied to a cooling unit mounted on the roof of a vehicle will be described with reference to the drawings.

FIG. 1 shows an outline of the cooling unit, and FIG. 2 shows the cooling unit installed on the roof of a bus vehicle.

A cooling unit 1 is mounted on the roof of a vehicle, and includes a ventilation duct 4 between a cover 2 and a ceiling material 3. Inside this ventilation duct 4, a refrigerant evaporator 5 of a freezing cycle is disposed over the entire surface of the air passage. The refrigerant evaporator 5 is made of a rectangular parallelepiped and is arranged so that its longitudinal direction is perpendicular to the longitudinal direction of the vehicle.

Further, on the upstream side of the refrigerant evaporator 5 of the ventilation duct 4, there are provided discharge ports of two centrifugal air blowers 1fi6.1 that generate airflow toward the vehicle interior through the ventilation duct 4.

An outside air suction duct 8 is attached to the suction port of one of the air blowers 1116, which communicates the suction port with the outside of the cover 2. An inside air introduction port 9 that opens into the inside of the cover 2 is provided in the middle of this outside air suction duct 8 . Further, inside the outside air suction duct 8, an inlet switching damper 10 is provided that closes either the inside air inlet 9 or the outside air suction duct 8 upstream of the inside air inlet 9. The outside air suction duct 8, the inside air inlet 9, and the inlet switching damper 10 constitute an inlet switching means 11.

In the ventilation duct 4 on the discharge side of the other blower 7, there is a chamber 12.
is formed. This air 12 is provided with an inside air supply port 13 that opens on the upstream side of the refrigerant evaporator 5 in the ventilation duct 4 . Further, the chamber 12 is provided with an exhaust duct 14 that communicates the inside of the chamber 12 with the outside of the cover 2. room 12
A discharge port switching damper 15 that closes either the inside air supply port 13 or the exhaust duct 14 is provided inside. These, chamber 12, inside air supply port 13, exhaust duct 14
, a discharge port switching means 16 is constituted by the discharge port switching damper 15.

The ceiling material 3 inside the cover 2 is provided with an inside air inlet 17 that communicates the inside of the cover 2 with the interior of the vehicle.

A right outlet 18 and a left outlet 19 are provided on both left and right sides of the ventilation duct 4 on the downstream side of the refrigerant evaporator 5.

This right side outlet 18 is connected to a right side cold air duct 20 provided so as to extend in the front-rear direction on the right side of the ceiling of the bus vehicle. Further, the left side outlet 19 is connected to a left side cold air duct 21 provided so as to extend in the front-rear direction on the left side of the ceiling of the bus vehicle.

Next, the operation of the above embodiment will be explained.

When a control device (not shown) instructs internal air circulation according to the operation mode of the air conditioner selected by a vehicle occupant, an actuator (not shown) operates to switch the inlet switching damper 10.
blocks the outside air intake duct 8 upstream of the inside air inlet 9,
At the same time as the inside air introduction port 9 opens, the discharge port switching damper 1
5 closes the exhaust duct 14, and the inside air supply port 13 is opened.

As a result, one side of the air blower I! 16 sucks the inside air sucked from the inside air inlet 17 through the inside air inlet 9 and discharges it to the upstream side of the refrigerant evaporator 5 of the ventilation duct 4.

Also, send IM from the other side! 117 discharges the inside air sucked through the inside air inlet 17 into the chamber 12 and discharges it to the upstream side of the refrigerant evaporator 5 of the ventilation duct 4 via the inside air supply port 13.

The internal air discharged to the upstream side of the refrigerant evaporator 5 exchanges heat with the refrigerant evaporator 5, and is supplied to the right side cold air duct 20 and the left side cold air duct 21 through the right side outlet 18 and the left side outlet 19, and is supplied to the right side cold air duct 20 and the left side cold air duct 21, and is then supplied to the right side cold air duct 20 and the left side cold air duct 21 through the right side outlet 18 and the left side outlet 19. Duct 20 and left side cold air duct 2
1 and is discharged to each part of the vehicle interior.

At this time, if the refrigeration cycle is stopped, the inside air is discharged from the left and right cold air ducts 20 and 21 to circulate the inside air, and the refrigeration cycle is activated to supply low-temperature and low-pressure refrigerant into the refrigerant evaporator 5. When the inside air passes through the refrigerant evaporator 5, it is cooled and the inside of the vehicle is cooled.

When the 11110 device (not shown) instructs outside air intake according to the operation mode of the air conditioner selected by the vehicle occupant, the inlet switching damper 10 closes the inside air inlet 9 due to the action of the actuator (not shown), and the air is drawn from the inside air inlet 9. The upstream outside air intake duct 8 opens, the discharge port switching damper 15 closes the inside air supply port 13, and the exhaust duct 14 opens.

Thereby, one blower 6 sucks outside air through the outside air suction duct 8 and discharges it to the upstream side of the refrigerant evaporator 5 of the ventilation duct 4. The outside air discharged by one of the blowers 6 exchanges heat with the refrigerant evaporator 5, and is discharged from the right side cold air duct 20 and the left side cold air duct 21 to various parts in the vehicle interior.

At this time, when the freezing cycle is stopped, outside air is blown into the cabin, and when the freezing cycle is operating, the outside air is cooled as it passes through the refrigerant evaporator 5, and the cabin is cooled by the outside air. Ru.

Further, the other blower 7 discharges the inside air sucked through the inside air inlet 17 into the air 12 and exhausts it to the outside of the vehicle through the exhaust duct 14.

As described above, even if one of the blowers 1fi6 supplies outside air into the Ta room, the other blower 7 exhausts the inside air and suppresses the increase in the pressure inside the passenger compartment. The outside air that has passed through the refrigerant evaporator 5 is efficiently supplied into the vehicle interior.

FIG. 3 shows a second embodiment of the present invention.

This example uses two air blowers from the example above! The avsth air blower @22 is added between 116.7 and this added air blower 22 always sends air from the inside air inlet 17 regardless of the settings of the inlet switching means 11 and the outlet switching means 16. The sucked internal air is discharged upstream of the refrigerant evaporator 5.

FIG. 4 shows a third embodiment of the present invention.

In this embodiment, one of the air blowers shown in the above embodiment &! 16 and the added blower 22 are housed in a box 23, and one end of the outside air suction duct 8 is opened in the box 23.

As a result, the inlet switching damper 1 of the inlet switching means 11
0 closes the inside air inlet 9 and the outside air suction duct 8 upstream of the inside air inlet 9 opens, the 2m blower 6.22
introduces outside air into the vehicle interior.

(Modification) The opening degree of the inlet switching damper may be set so that it can be set to ig1, and the amount of outside air introduced may be adjusted. Further, the discharge port switching damper may also be provided in an adjustable manner.

Although an example in which the present invention is applied to a bus vehicle has been shown, it can be applied to any vehicle equipped with an air conditioner equipped with a plurality of blowers to blow air into the passenger compartment, such as a railway vehicle. , which can also be applied to ships.

Although a cold LI generator of a refrigeration cycle is used as the heat exchanger, other heat exchangers such as an indoor heat exchanger of an air-conditioning type refrigeration cycle or a hot water type heater core may be used.

Although an example has been shown in which the longitudinal direction of the heat exchanger is provided at right angles to the longitudinal direction of the vehicle, it may also be provided along the longitudinal direction.

Although the present invention has been applied to an air conditioner unit mounted on the roof of a vehicle, it may also be applied to air conditioners mounted on the floor of the vehicle, the side of the vehicle, the rear of the vehicle, the front of the vehicle, the interior of the vehicle, etc.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a cooling unit, FIG. 2 is a perspective view of the cooling unit shown in FIG. 1 installed on the roof of a bus, and FIG. 3 is a cooling unit showing a second embodiment of the present invention. FIG. 4 is a schematic diagram of a cooling unit showing a third embodiment of the present invention. In the diagram 5... Refrigerant evaporator 6.7... Air blower 81 1
1...Inlet switching means 16...Discharge port switching means Fig. 3 Fig. 4

Claims (1)

[Scope of Claims] 1) In an air conditioner equipped with a plurality of blowers that generate airflow toward the interior of a vehicle, when at least one of the plurality of blowers introduces air from outside the vehicle interior into the vehicle interior. An air conditioner for a vehicle, characterized in that at least one of the other blowers is provided to exhaust air inside the vehicle to the outside of the vehicle. 2) The plurality of blowers are provided on the roof of the vehicle, and are blowers of a cooling unit that exchanges heat with a refrigerant evaporator of a refrigeration cycle and supplies sucked air into the vehicle interior. The vehicle air conditioner according to item 1. 3) At least one of the plurality of blowers is provided with an inlet switching means for switching and introducing air from inside the vehicle interior or outside the vehicle interior, and at least one of the other blowers is configured to introduce air into the vehicle interior. and a discharge port switching means for switching and discharging air into the vehicle interior or outside the vehicle interior, and when the inlet port switching means sucks air outside the vehicle interior,
3. The air conditioner for a vehicle according to claim 1 or 2, wherein the discharge port switching means is provided so as to discharge the sucked air inside the vehicle outside the vehicle.