JPH04189670A - Air conditioning device for vehicle - Google Patents

Abstract

PURPOSE:To cool an inverter safely and effectively by providing an exhaust passage for sucking air inside of a vehicle or the like and exhausting it to the outside of the vehicle at a casing of an air conditioner provided at a ceiling of the vehicle, and disposing the inverter at this exhaust passage. CONSTITUTION:For an air conditioner for a vehicle, a chamber side unit 41 is formed and separated at a center part in a casing 1 mounted at a ceiling part of a vehicle S, and a machine chamber 13 containing a plural compressors 2 is formed at a right part, illustrated, of the chamber unit 14, and external side units 11, 12 are separated at both end parts of the machine chamber 13 and exhaust passage 10. An exhaust port for introducing air inside the vehicle S to the exhaust passage 10 is provided at one end part of the exhaust passage 10, and an exhaust fan 6 for exhausting exhaust outside the vehicle S is provided at the other end, while an inverter 5 for controlling the compressors 2 to change their ability is disposed in the exhaust passage 10, thereby it is cooled by cold air flowing in the exhaust passage 10.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a vehicle air conditioner installed in a vehicle such as a train, and in particular, to efficiently control an inverter device that controls a compressor. This invention relates to a vehicle air conditioner that achieves cooling.

(Prior Art) Generally, vehicles such as trains are equipped with vehicle air conditioners to maintain a comfortable atmosphere inside the vehicle.

This single-phase air conditioner, for example, as shown in Section 4,
A machine room in which a pressurizer for a casing a placed on the roof of the vehicle is housed, an outdoor side in which an indoor heat exchanger C is housed, and a chamber in which an outdoor heat exchanger d is housed. It is partitioned on the outside.

To cool the inside of the vehicle, air inside the vehicle is sucked into the indoor side of the casing a through an air suction port formed in the ceiling of the vehicle by an indoor blower g installed downstream of the indoor heat exchanger C. After being cooled by the indoor heat exchanger C, the air is blown into the vehicle from an outlet i provided at the bottom of the indoor blower g. Further, the outdoor heat exchanger d is provided with an outdoor air blower 81e, which introduces outside air into the outdoor heat exchanger d to cool the outdoor heat exchanger d.

(Problem to be solved by the invention! M) By the way, in recent years, the air conditioners for vehicles have come to be driven by variable-capacity inverter devices instead of pressurized air conditioners. This inverter device consists of transistors and the like and generates heat, so as shown in the figure, a method is also adopted in which the inverter device is installed near the air intake port on the indoor side and cooled by air sucked in from inside the vehicle. however,
This amount of intake air is determined by the air conditioning load inside the vehicle, and the amount of intake air is determined regardless of the heat generation of the inverter device f, so the temperature of the electrical components in the inverter device f may exceed the heat-resistant temperature. There were times when an abnormality was detected, causing the system to stop operating or cause electrical parts to malfunction. . In the unlikely event that smoke was emitted from the inverter f, the smoke and odor would be blown into the car by the indoor blower g, which would make passengers feel uneasy, which is not desirable from a safety perspective. .

Therefore, the present invention has been devised to effectively solve the above-mentioned problem, and its purpose is to improve the inverter device f.
To provide an air conditioner for a vehicle that achieves protection from high heat by safely and effectively cooling the vehicle.

[Structure of the Invention (Means for Solving the Problems) In order to solve the above problems, the present invention provides an outdoor side where an outdoor heat exchanger is housed in a casing of an air conditioner installed on the ceiling of a vehicle, etc. an indoor side where an indoor heat exchanger is housed;
In a vehicle air conditioner each having a machine room in which a compressor driven by an inverter device is housed, an exhaust passage is formed in the casing for sucking vehicle air and exhausting it to the outside of the vehicle. The above inverter device is installed.

(Function) As described above, the present invention installs an inverter device that easily generates heat in the exhaust passage that sucks air inside the vehicle and exhausts it to the outside of the vehicle, and cools this inverter device with the cold air from the exhaust air inside the vehicle. Heat generation can be prevented and the cooling effect can be enhanced. Further, even if smoke is emitted from the inverter device, the smoke and bad odor are exhausted to the outside of the vehicle along with the vehicle air, so that they will not be blown into the vehicle.

(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a top plan view of the arrangement structure of a vehicle air conditioner according to the present invention.

As shown in the figure, in this vehicle air conditioner, an indoor unit 14 that circulates and cools the air inside the vehicle Is is defined in the center of a casing 1 mounted on the roof of the vehicle S. A machine room 13 in which a plurality of compressors 2 for compressing refrigerant are housed is formed on the right side of the indoor unit 14 in the figure. Furthermore, an exhaust passage 10 is formed on the left side of the indoor unit 14 in the figure to exhaust dirty air inside the vehicle V4S to the outside of the vehicle S, and furthermore, at both ends of the machine room 13 and the exhaust passage 10, An outdoor unit 11.12 is sectioned.

Suction ports 9 for sucking air inside the vehicle S are formed at both ends of the indoor unit 14, and an indoor blower 7 is provided at the center thereof. Furthermore, the suction port 9
An indoor heat exchanger 3 is arranged between the air blower 7 and the indoor blower 7, and cools the air inside the vehicle S sucked in through the suction port 9 and distributes it to the ceiling inside the vehicle S, as shown in FIG. The air is blown out into a blow-off duct 15 that is not provided.

This blow-off duct 15 has a large number of air blow-off ports 17 and air suction ports 16 formed in the length direction of the vehicle S, and sends the air sucked in from the air suction ports 16 to the indoor unit 14, and Cold air sent from the unit 14 into the blow-off duct 15 is blown out into the vehicle S.

In addition, an outdoor heat exchanger 4 and an outdoor blower 8 are provided in the condensing portions 11 and 12, respectively, for condensing the compressed refrigerant. 4 is being cooled.

Furthermore, an exhaust port 18 is formed at one end of the exhaust passage 10 to introduce air inside the vehicle S into the exhaust passage 10, and at the other end, an exhaust port 18 is formed to exhaust the air inside the exhaust passage 10 to the outside of the vehicle S. An exhaust fan 6 is provided. And this exhaust port 18
In the exhaust passage 10 of the exhaust fan 6, there is an inverter device 5 for controlling the compression @2 in the machine room 13 with variable capacity.
is arranged so that it is cooled by the cold air inside the vehicle flowing through the exhaust passage 10.

Next, one embodiment of the present invention will be described.

As shown in FIGS. 1 and 2, the air inside the vehicle S is introduced into the indoor unit 14 from the air intake port 9, passes through the indoor heat exchanger 3 and is cooled, and then is cooled by the indoor blower 7. The air is sent into the blow-off duct 15 and blown out from the plurality of air blow-off ports 17 to cool the inside of the vehicle S.

On the other hand, as shown in FIG. 3, part of the air inside the vehicle S is exhausted to the outside of the vehicle S by the exhaust fan 6 through the exhaust passage 10.

To explain this in detail, a part of the cold air inside the vehicle S sucked into the blow-off duct 15 from the air suction port 16 formed in the blow-off tact 15 is transferred from the exhaust port 9 formed in the exhaust passage 10 by the exhaust fan 6. When introduced into the exhaust passage 10 and passing therethrough, it passes around the inverter device 5 to be cooled, and is then exhausted to the outside of the vehicle S by the exhaust fan 6.

In this way, in the present invention, the inverter device 5 that controls the vehicle air conditioner is cooled by the cooled exhaust air inside the vehicle S, which was conventionally simply discarded. This makes it possible to prevent high temperatures from occurring, and also improves the cooling effect. Further, even if the inverter device 5 causes an accident such as smoke generation, the smoke and bad odor will be exhausted to the outside of the vehicle S together with the exhaust gas, so that the passengers will not feel uneasy more than necessary. In this case, the exhaust fan 6 is equipped with an inverter! 5
Of course, it is not controlled by.

[Effect of the invention] The present invention has the following excellent effects.

g) During cooling operation, the temperature inside the vehicle is naturally always lower than the outside air temperature, so the cooling effect is greater than that of a cooling method that uses outside air.

(2) Even if the inverter device causes an accident such as smoke generation, the smoke and odor will not be blown into the vehicle, so there is no need to worry about causing undue anxiety to passengers.

(3) Normal commuter vehicles are rarely equipped with exhaust ports, and ventilation is naturally achieved by opening and closing the doors, but with the present invention, the inside of the vehicle can be exhausted even when the doors are closed. Become.

[Brief Description of the Drawings] Fig. 1 is a plan view showing one embodiment of the present invention, Fig. 2 is a schematic side view of a vehicle, Fig. 3 is a schematic sectional view showing an exhaust system, and Fig. 4 is a conventional FIG. 1 is a schematic diagram showing a vehicle air conditioner. In the figure, 5 is an inverter unit, 10 is an exhaust system, 19 is an exhaust flow path, and S is a vehicle.

Claims (1)

[Claims] 1. An outdoor side where an outdoor heat exchanger is housed in the casing of an air conditioner installed on the ceiling of a vehicle, an indoor side where an indoor heat exchanger is housed, and a machine where a compressor driven by an inverter device is housed. A vehicular air conditioner having separate chambers, characterized in that the casing has an exhaust passage for sucking air inside the vehicle and exhausting it to the outside of the vehicle, and the inverter device is disposed in the exhaust passage. Air conditioner.