JPH03284468A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To secure an blowoff air quantity out of a blowoff duct by forming a top face of the blowoff duct, formed in an outdoor machine cover for an air conditioner being set up in and around a pantograph surrounded by a pantograph on the roof of a vehicle, into such an incline as tilted high toward the pantocover. CONSTITUTION:In a high-speed vehicle, an air conditioner 1 is installed nearby a pantograph 3 surrounded by a pantocover 2 for sound insulation. In this case, each top of of a blowoff duct 8, a compressor cover 11 and an indoor machine cover 12 is formed into a range of first - third inclines 21-23 tilted high toward the pantocover 2. At this time, each inclination of these inclines 21-23 should be set to almost the same while a flat surface connecting the highest end of the first incline 21 and the lowest end of the third incline 23 should be set so as to be situated on the same plane. With this constitution, such a possibility that a top side of the blowoff duct 8 might come to positive pressure and air is thereby hard to flow into an outdoor machine part 5 is prevented from occurring, thus a blowoff air quantity in the outdoor machine part 5 is made so as to be sufficiently securable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) This invention relates to a vehicle air conditioner installed on the roof of a vehicle.

(Prior Art) For example, in a high-speed vehicle, as shown in FIG. 5, an air conditioner 1 is sometimes installed near a pantograph 3 surrounded by a pantograph cover 2 for soundproofing. The air conditioner 1 has a box-shaped main body 4, as shown in FIGS. 6 and 7. The main body 4 has one longitudinal end formed as an outdoor unit section 5, a midway section formed as a compressor section 6, and the other end formed as an indoor unit section 7.

An outdoor unit cover 9 in which a blowout duct 8 is formed is provided on the upper surface of the outdoor unit section 5 of the main body 4, and a compressor cover 11 is provided on the upper surface of the compressor section 6. The height h of the blow-off duct 8 was approximately 50 mm, which was set considerably lower than the height of the pantograph cover 2.

Further, an indoor unit cover 12 is provided on the upper surface of the indoor unit section 7. Although not shown, an outdoor heat exchanger, an outdoor blower, and the like are provided in the outdoor unit section 5, and a compressor is provided in the compressor section 6. Further, the indoor unit section 7 is provided with an indoor heat exchanger and an indoor blower.

An outside air suction port 13 is formed on the side surface of the outdoor unit section 5,
The outside air sucked in through the outside air suction port 13 passes through the interior of the outdoor unit 5 and is blown out from the blow-off duct 8 as shown by the arrow in FIG. An indoor air suction port 14 is formed on the side surface of the indoor unit section 7. Indoor air sucked into the indoor unit section 7 through the suction port 14 undergoes heat exchange with an indoor heat exchanger, and is then blown out from an air outlet 15 formed on the end surface of the indoor unit section 7.

The main body 4 configured in this manner is dropped into the space 19 between the roof 17 and the ceiling plate 18 of the vehicle 16 with the air outlet duct 8 positioned on the side of the pantyhose cover 2, as shown in FIG. At the same time, a blow-out duct 8, an outdoor unit cover 9, and an indoor unit cover 12 on the upper surface are provided to protrude from the upper surface of the roof 17.

By the way, when the vehicle 16 equipped with the air conditioner 1 having such a configuration runs in the direction indicated by arrow R in FIG.
Air flows approximately parallel to the roof 17 on the upper surface of the main body 4 as shown by arrow A.

This air collides with the outer peripheral surface of the puncture cover 2 to become a turbulent flow, and the air becomes difficult to flow on the upper surface side of the blow-off duct 8 located near the puncture cover 2. Therefore, the static pressure on the upper surface side of the blowout duct 8 becomes positive pressure, and the pressure difference between the suction side and the blowout side in the outdoor unit section 5 becomes small.
There is a risk that the air volume will decrease and the refrigerant will not be condensed in the outdoor heat exchanger.

(Problem to be Solved by the Invention) As described above, in a vehicle air conditioner in which the blowout duct is installed near the puncture cover surrounding the pantograph, the air flow collides with the puncture cover and is disturbed. Since the upper surface side of the above-mentioned blow-off duct becomes a positive pressure and the air becomes difficult to blow out, there is a possibility that the blow-off air volume cannot be secured and sufficient heat exchange in the outdoor heat exchanger will not be performed.

This invention was made based on the above-mentioned circumstances, and its purpose is to prevent air from becoming difficult to flow on the upper surface side of the blow-off duct in a vehicle equipped with a puncture cover. An object of the present invention is to provide a vehicle air conditioner.

[Structure of the Invention] (Means and Effects for Solving the Problems) In order to solve the above problems, the present invention has an outdoor unit cover provided with a blow-off duct, and the outdoor unit cover is connected to a puncture on the roof of a vehicle. The air conditioner for a vehicle is located near a pantograph surrounded by a cover, and the air conditioner is characterized in that the upper surface of the blow-off duct is formed into an inclined surface that is highly inclined toward the puncture cover.

According to such a configuration, since the upper surface of the air outlet duct is an inclined surface, the air flowing along the inclined surface as the vehicle travels is directed upward and is less likely to become turbulent on the upper surface of the air outlet duct. , it is possible to prevent positive pressure from forming on the upper surface side of the blow-off duct.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. Note that the same parts as those in the conventional structure shown in FIGS. 5 to 7 are given the same symbols, and the description thereof will be omitted.

An air conditioner 20 for a vehicle according to the present invention shown in FIGS. 5 to 7 is comprised of a conventional air conditioner 1, a blow-off duct 8 provided on an outdoor unit cover 9, a compressor cover 11, and an indoor unit cover 12. Different shapes. That is, the upper surface of the blowout duct 8, the upper surface of the compressor cover 11, and the upper surface of the indoor unit cover 12 are respectively formed into first to third inclined surfaces 21, 22, and 23 that are highly inclined toward the puncture cover 2. There is. The inclination angles of the first to third inclined surfaces are set to be almost the same, and the plane connecting the highest end of the first inclined surface 21 and the lowest end of the third inclined surface 23 is They are set to be located on the same plane. In other words, the first to third inclined surfaces 21, 22, and 23 are located on a straight line.

The maximum height dimension H of the first inclined surface 21 of the above-mentioned blow-out duct 8 is set to about 200 to 300 degrees.

Thereby, the difference in height between the upper end of the first inclined surface 21 located on the puncture cover 2 side and the upper end of the puncture cover 2 is reduced.

The vehicle 16 equipped with the air conditioner 20 having the above configuration is the first
When traveling in the direction shown by arrow R in the figure, the roof 1 of the vehicle 16
7, air flows in the opposite direction to the traveling direction, as shown by arrow B. The air flow on the roof 17 is the third
slope 23, second slope 22 and first slope 2
It goes upward according to the inclination angle of 1. Therefore, the air flowing along the inclined surface 23, 22, 21 rarely collides with the outer peripheral surface of the puncture cover 2 and stays on the upper surface of the outlet duct 8, so that the upper surface side of the outlet duct 8 is under positive pressure. Therefore, it is possible to prevent air from becoming difficult to circulate to the outdoor unit section 5.

In other words, since a sufficient amount of air is blown out from the outdoor unit 5, the outdoor heat exchanger does not become difficult to cool.

FIG. 4 is a graph showing the relationship between the height of the blow-off duct 8, indicated by H in FIG. 2, and the air volume of the outdoor unit 5. As can be seen from this graph, the higher the blow-off duct 8 is, the greater the amount of air flowing through the outdoor unit section 5 is. Note that the rated air volume in the outdoor unit 5 can be ensured when the height of the blow-off duct 8 is 200 to 300 mm.

This invention is not limited to the one embodiment described above, and can be modified in various ways. For example, in the embodiment described above, the upper surfaces of the compressor cover 11 and the indoor unit cover 12 are also formed as inclined surfaces, but these upper surfaces may not be formed as inclined surfaces, and only the upper surface of the blow-off duct 8 may be formed as an inclined surface.

In that case, it is better to make the upper surfaces of the compressor cover 11 and the indoor unit cover 12 the same as or lower than the height of the lowest end of the slope of the air outlet duct 8 to smooth the flow of air on the upper surface of the air outlet duct 8. It can be done.

[Effects of the Invention] As described above, the present invention provides a blow-out duct formed on the outdoor unit cover of a vehicle air conditioner that is located near a pantograph surrounded by a puncture cover on the roof of the vehicle. was formed into a slope highly inclined toward the puncture cover. Therefore, the air flowing on the top surface of the blowout duct flows upward along the slope and is unlikely to collide with the outer peripheral surface of the puncture cover, so the air flows smoothly on the top side of the blowout duct, and the air flows upward from the blowout duct. The amount of air blown can be ensured.

[Brief explanation of the drawing]

Fig. 1 is a side view of a vehicle showing one embodiment of the present invention;
The figure is a side view of the air conditioner, FIG. 3 is a partially omitted plan view, FIG. 4 is a graph showing the relationship between the height of the outlet duct and the air volume, and FIG. 5 is a side view of a conventional vehicle. FIG. 6 is a side view of the air conditioner, and FIG. 7 is a partially omitted plan view. 2... Punk cover 3... Pantograph, 8...
-Blowout duct, 9... Outdoor unit cover 16... Vehicle, 17... Roof, 21... First slope. 100 200 300 ri)
South height H (mm) Fig. 4

Claims (1)

[Claims] In a vehicle air conditioner which has an outdoor unit cover provided with a blow-off duct and is installed by positioning the outdoor unit cover near a pantograph surrounded by a pantograph cover on the roof of the vehicle, the top surface of the blow-off duct is An air conditioner for a vehicle, characterized in that it is formed on an inclined surface that is highly inclined toward the pantograph cover.