JP2002029241A - Air conditioner for bus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner for a bus capable of ensuring air quan tity in each zone of a front part, a central part, and a rear part in a bus com partment and facilitating maintenance and inspection properties of a cooler unit. SOLUTION: A flat cooler duct 5 blocking both ends along the forward and backward directions of the bus vehicle 30 is arranged at right and left ends of a ceiling of the bus vehicle 30 by dividing it into a plurality of parts, cooler units 9 consisting of an evaporator 8, a reheat core 7, and a blower 9 and capable of controlling air conditioning independently are installed on respective cooler ducts 5 by communicating them with the cooler ducts 5, and a baggage shelf is attached to a front face of the cooler ducts 5 by a lid hiding the cooler units 5 and a stay.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a bus vehicle capable of performing appropriate air conditioning control in accordance with a heat load distribution state in a bus cabin.

[0002]

2. Description of the Related Art An air conditioner for a bus vehicle capable of controlling the air conditioning in accordance with the distribution of the heat load in the bus compartment is disclosed in, for example, Japanese Patent Application Laid-Open No. Hei 7-108814. In general, this type of device passes one cooler duct through the left and right ends of the ceiling of the vehicle along the front-rear direction of the vehicle, and supplies a cool air outlet and a damper to each of the front, center, and rear zones in the bus cabin. And the amount and direction of the cool air supplied from one end of the cooler duct from the cooler unit is blown out to each zone by controlling the damper.

[0003]

In the above-mentioned conventional air conditioner for a bus vehicle, the air volume and the air direction are controlled in accordance with the heat load distribution state in each of the front, center and rear zones in the bus cabin. However, since the cool air is supplied from one end of one long cooler duct passing in the front-rear direction of the vehicle, the cool air is supplied at one end side of the cooler duct to which the cool air is supplied, but the cool air is supplied. There is a problem that the air volume is reduced at a portion farther from one end side. If the air volume of the blower is increased in order to solve this problem, the air volume of a portion far from the one end to which the cool air is supplied is secured. However, this has a problem that the size of the blower is increased to increase the cost, and that the amount of air at one end side of the cooler duct to which the cool air is supplied is significantly increased, resulting in an imbalance in the air volume over the entire length of the cooler duct. In addition, there is a built-in type in which the cooler unit is mounted in a cooler duct, but in this case, there is a problem that the maintenance and inspection of the cooler unit is poor.

It is an object of the present invention to provide an air conditioner for a bus vehicle which secures an air volume in each of the front, center and rear zones in a bus cabin and facilitates maintenance and inspection of a cooler unit. .

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention divides a flat cooler duct, whose both ends are closed, into a plurality of parts at the left and right ends of the ceiling of a bus vehicle along the front-rear direction of the bus vehicle. A cooler unit comprising an evaporator, a reheat core, and a blower, which can be independently controlled for air conditioning, is installed on each of the cooler ducts in communication with the cooler duct, and a luggage shelf is provided at the front of the cooler duct with the cooler. It is characterized in that it is attached by a stay which also serves as a cover for concealing the unit.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 30 denotes a bus vehicle. In the present invention, the interior of the bus
0, a central zone 11 and a rear zone 12, and flat cooler ducts 5 having both ends closed along the front-rear direction of the bus vehicle 30 are divided and arranged at the left and right ends of the ceiling of each zone, respectively. 8. A cooler unit 6 composed of a reheat core 7 and a blower 9 and capable of independently controlling air conditioning is installed on each of the cooler ducts 5 in communication with the cooler duct 5.

The evaporator 8 is connected to a condenser 2 of a cooling device driven by the engine 1 by a liquid refrigerant supply pipe 14, and is connected to a low-pressure low-temperature mist refrigerant return pipe 13 connected to a compressor (not shown). ing. The reheat core 7 is connected to the heating heat exchanger 3 near the engine 1 via a hot water supply pipe 15 and a hot water return pipe 16. Reference numeral 4 denotes a heating device connected to the hot water supply pipe 15.

As shown in FIGS. 3 and 4, the cooler unit 6 has an evaporator 8 and a reheat core 7 arranged side by side, and a blower 9 is connected to the evaporator 8 through a duct 25.
Is connected so as to blow air to the back of the camera. As shown in FIG. 2, the cooler unit 6 is bolted by installing the reheat core 7 with the reheat core 7 on the indoor side on the mounting seat 26 formed on the upper surface of each flat cooler duct 5.

A cooler unit 6 installed on the upper surface of each cooler duct 5 has an outside air suction port 1 opened on the roof.
7 and the inside air suction port 18 opened to the inside of the room, the combined air of outside air and inside air is taken in. Further, each cooler duct 5 is provided with an indoor outlet 19 and a window-side outlet 20 for cool air.

Further, in the present invention, a luggage shelf 21 is attached to the front of each of the cooler ducts 5 with a stay 22 which also serves as a lid 23 for concealing each of the cooler units 6.

Since the present invention has a structure as described above, the evaporator 8 of the cooler unit 6 is configured such that the liquid refrigerant is supplied from the condenser 2 by the liquid refrigerant pipe 14, and the low-pressure low-temperature mist refrigerant is supplied from the evaporator 8 to the low-pressure low-temperature mist refrigerant. Return piping 1
3 returns to a compressor (not shown), and the compressor supplies high-pressure high-pressure gas to the condenser 2. The reheat core 7 is supplied with hot water from the heating heat exchanger 3 by a hot water supply pipe 15, and the hot water from the reheat core 7 is returned to the heating heat exchanger 3 by a hot water return pipe 16.

The blower 9 sucks the combined air of the outside air from the outside air suction port 17 and the inside air from the inside air suction port 18, and passes the cool air from the back of the evaporator 8 through the evaporator 8 through the reheat core 7 to the cooler duct 5 and blows out the indoor air. It blows out from the mouth 19 and the window-side outlet 20. The reheat core 7 adjusts the temperature of the cool air passing through the evaporator 8 to be cooled to a set temperature.

Therefore, in the present invention, in each of the front zone 10, the center zone 11, and the rear zone 12,
This is a configuration in which a flat cooler duct 5 having both ends closed is divided and arranged, and a cooler unit 6 capable of controlling air conditioning independently is installed in each cooler duct 5.
In addition to ensuring the air volume in each zone, appropriate air conditioning control can be obtained according to the heat load distribution state of each zone.

Also, a luggage shelf 2 is provided in front of each cooler duct 5.
1 is attached with a lid 23 and a stay 22 for concealing each cooler unit 6, so that the cooler unit 6
By removing the stay 22 of the lid 23 that conceals the installation site of the above, the maintenance and inspection work of the cooler unit 6 can be easily performed.

In addition, since the cooler duct 5 has a flat shape, the cooler duct 5 can be reduced in size and a one-man broadcasting device or the like can be mounted in an empty space on the upper surface where the cooler unit 6 is not installed.

[0016]

As described above, according to the present invention, in each of the front zone, the center zone and the rear zone in the interior of the bus vehicle, the airflow is ensured and the heat load distribution state of each zone is ensured. Appropriate cooling control can be obtained according to the conditions, and the maintenance and inspection work of the cooler unit can be easily performed.The cooler duct can be reduced in size by using a flat cooler duct to reduce costs and use the space above the cooler duct. This has the advantage that it can be performed.

[Brief description of the drawings]

FIG. 1 is an overall schematic diagram of the present invention.

FIG. 2 is a sectional view of a main part of the present invention.

FIG. 3 is a front view of the cooler unit of the present invention.

FIG. 4 is a plan view of a cooler unit according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Engine 2 Condenser 3 Heating heat exchanger 5 Cooler duct 6 Cooler unit 7 Reheat core 8 Evaporator 9 Blower 10 Front zone 11 Central zone 12 Rear zone 21 Luggage rack 22 Stay 23 Lid

Claims (1)

[Claims] 1. A flat cooler duct having both ends closed is divided into a plurality of pieces at the left and right ends of a ceiling of a bus vehicle along a front-rear direction of the bus vehicle, and an independent cooler duct comprising an evaporator, a reheat core and a blower is provided. A cooler unit capable of controlling air conditioning is installed on each of the cooler ducts in communication with the cooler duct, and a luggage shelf is attached to a front surface of the cooler duct with a stay also serving as a lid for concealing the cooler unit. Bus vehicle air conditioner.