JPH06211032A - Roof-installed type vehicular air conditioner - Google Patents

Abstract

PURPOSE:To provide a roof-installed type vehicular air conditioner excellent in the generality of use and easy in maintenance. CONSTITUTION:The unit case 7 of a roof unit is formed of a lower case 7a and an upper cover 7b, and a piping space S for disposing high pressure piping 14 and low pressure piping 15 is secured at the outer periphery of the lower case 7a. The whole outer periphery of the lower case 7a is covered with the upper cover 7b, and the piping space S is formed at the outer periphery of the lower case 7a, inside of the upper cover 7b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof-mounted air conditioner for vehicles, and is particularly suitable for use in large vehicles such as bus vehicles.

[0002]

2. Description of the Related Art Conventionally, in large vehicles such as bus vehicles,
Many rooftop-installed air conditioners are used because of their excellent installation and versatility. This rooftop air conditioner
There is a rooftop unit of a package type in which each functional component other than the refrigerant compressor of the refrigeration cycle is unitized and housed in one unit case and installed on the roof of the vehicle. As shown in FIG. 5, the unit case includes a lower case 102 having a piping space S for refrigerant pipes (high-pressure pipe 100 and low-pressure pipe 101) connected to a refrigerant compressor, and a packing 103 in the lower case 102. It is composed of an upper cover 105 which is fixed by screws 104.

[0003]

However, the conventional rooftop unit has a high pressure pipe 100 connected to the upstream side (refrigerant compressor side) of the refrigerant condenser and a downstream side (refrigerant compressor side) of the refrigerant evaporator. The low-pressure pipes 101 to be connected are arranged in the pipe space S covered by the lower case 102. For this reason, once the rooftop unit is mounted, it is difficult to change the pipe outlet, so it is necessary to specify the pipe outlet in advance. Therefore, in order to cope with vehicle types in which the piping arrangement on the vehicle side differs depending on the mounting position of the refrigerant compressor, it is necessary to prepare various types of rooftop units with different piping outlets, which impairs versatility. Become. Also,
After installing the rooftop unit on the vehicle, maintenance from outside is difficult. The present invention has been made based on the above circumstances, and an object thereof is to provide a roof-mounted air conditioner for a vehicle, which has excellent versatility and is easy to maintain.

[0004]

In order to achieve the above-mentioned object, the present invention is a package installed on the roof of a vehicle in which functional parts constituting a refrigeration cycle other than a refrigerant compressor are integrally housed. In a rooftop installation type vehicle air conditioner including a rooftop unit of a mold, the rooftop unit includes a case that integrally stores the functional components,
A technical means is to have a piping space of a refrigerant pipe connected to the refrigerant compressor on the outer periphery of the case, and the piping space is covered with a cover that is removable from the case.

[0005]

In the rooftop-mounted air conditioner for a vehicle of the present invention having the above-described structure, a piping space is provided on the outer periphery of the case that integrally houses the functional parts, and the piping space can be attached to and detached from the case. Covered by a transparent cover. Therefore, by removing the cover, the piping work of the refrigerant pipe becomes easy. Therefore, the pipe outlet of the refrigerant pipe can be easily changed anywhere on the outer circumference of the case. Also, maintenance after installing the rooftop unit on the vehicle can be easily performed by removing the cover.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the rooftop mounted air conditioner for a vehicle according to the present invention will be described below with reference to FIGS. FIG. 1 is a cross-sectional view of the unit case (cross-section AA in FIG. 2), and FIG. 2 is a schematic view of the rooftop unit. The rooftop installed vehicle air conditioner of this embodiment is mounted on the bus vehicle 1 (see FIG. 3), and includes a refrigerant compressor (not shown) driven by a traveling engine (not shown), and A package-type rooftop unit 2 that integrally houses each functional component that constitutes a refrigeration cycle other than the refrigerant compressor. The refrigeration cycle includes, in addition to the refrigerant compressor, a refrigerant condenser 4 and a receiver (not shown) that form a condensing unit together with the condenser fan 3, and a pressure reducing device (not shown) that forms a cooling unit together with the evaporator blower 5. A refrigerant evaporator 6 is provided (see FIG. 2). Rooftop unit 2
In the above, the condensing unit and the cooling unit are integrally housed in one unit case 7 and installed on the roof of the bus vehicle 1 (see FIG. 3).

The unit case 7 has an inlet 8 for taking in the air blown to the refrigerant evaporator 6 from the passenger compartment along with the operation of the evaporator blower 5, and the air cooled by the refrigerant evaporator 6 into the passenger compartment. Air outlet 9 for blowing out (see FIG. 2)
And a lower case 7a having an inlet, an inlet 10 for introducing air to be blown to the refrigerant condenser 4 from the outside of the vehicle compartment along with the operation of the condenser fan 3, and an air heated by the refrigerant condenser 4. The upper cover 7b includes a discharge port 11 (see FIG. 3) for discharging the vehicle to the outside of the vehicle. As shown in FIG. 1, the lower case 7a and the upper cover 7b are appropriately fixed by screws 13 via packings 12. On the outer periphery of the lower case 7a, a high-pressure pipe 14 connected to the upstream side of the refrigerant condenser 4 (refrigerant compressor side) and a low-pressure pipe 15 connected to the downstream side of the refrigerant evaporator 6 (refrigerant compressor side). The piping space S for arranging is secured (see FIG. 1). In this piping space S, the upper cover 7b covers the outer circumference of the lower case 7a over the entire circumference, and the upper cover 7b
It is formed inside b and on the outer periphery of the lower case 7a.

As shown in FIG. 3, in the passenger compartment, cold air ducts 16 extending in the front-rear direction of the vehicle are provided on the left and right ceiling shoulders, and are connected to the air outlets 9 of the lower case 7a. . In addition, each cold air duct 16 is appropriately provided with a plurality of outlets 16a that open into the vehicle interior. The high-pressure pipe 14 connected to the upstream side (refrigerant compressor side) of the refrigerant condenser 4 is a first high-pressure pipe 14a drawn from the refrigerant condenser 4 to the side (left side in FIG. 2) of the unit case 7.
And a second high-pressure pipe 14b connected to the first high-pressure pipe 14a and extending in a pipe space S in the unit case 7 toward the vehicle rear side of the rooftop unit 2. The low-pressure pipe 15 connected to the downstream side (refrigerant compressor side) of the refrigerant evaporator 6 is connected to the unit case 7 from the refrigerant evaporator 6.
The first low-pressure pipe 15a drawn to the side of the
The second low-pressure pipe 15 that is connected to the low-pressure pipe 15a and extends along the second high-pressure pipe 14b in the pipe space S in the unit case 7 toward the vehicle rear side of the rooftop unit 2.
b. Second high-pressure pipe 14b and second low-pressure pipe 1
5b is taken out from the unit case 7 and connected to each refrigerant pipe 17 on the vehicle side. Each refrigerant pipe 17 on the vehicle side
As shown in FIG. 3, the pipe is connected to the refrigerant compressor after being piped in the cold air duct 16 to the rear of the vehicle and extended to the underfloor at the rear end of the vehicle compartment.

In the rooftop installed vehicle air conditioner of the present invention having the above-mentioned structure, the pipe space S of the second high-pressure pipe 14b and the second low-pressure pipe 15b is provided on the outer periphery of the lower case 7a, and the lower case It is covered with an upper cover 7b which is attachable to and detachable from 7a. Therefore, by loosening the screw 13 and removing the upper cover 7b, the second high-pressure pipe 14b and the second low-pressure pipe 15b are exposed to the outside, so that the first high-pressure pipe 14a, the second high-pressure pipe 14b, and the first low-pressure pipe 15a. It is possible to easily perform the connecting work between the second low-pressure pipe 15b and the second low-pressure pipe 15b even from the outside. Therefore, when installing the rooftop unit 2 on the vehicle side, the second high-pressure pipes 14b and the second high-pressure pipes 14b that are adapted to the pipe arrangements on the vehicle side differ depending on the mounting position of the refrigerant compressor and the like.
By preparing the low-pressure pipe 15b in advance, or by appropriately processing the second high-pressure pipe 14b and the second low-pressure pipe 15b as necessary, the first high-pressure pipe 14a and the first high-pressure pipe 14a are provided all around the unit case 7. Low pressure pipe 1
The outlets B and C of 5a (see FIG. 2) can be freely changed and dealt with. In addition, the rooftop unit 2 is connected to the bus vehicle 1
The upper cover 7 is also used for maintenance after installation.
This can be easily done by removing b.

Next, a second embodiment of the present invention will be described. FIG. 4 is a sectional view of the unit case 7 including the piping space S. The unit case 7 of this embodiment is the lower case 7a.
And a screw 1 through the packing 12 to the lower case 7a.
A pipe space S is formed around the upper cover 7b and the lower case 7a fixed by the lower case 7
It is composed of a lid 7c for inspection which is attached over the entire circumference of a. In this embodiment, the number of parts is increased by providing the inspection lid 7c. Can be changed freely and maintenance can be easily performed.

[0011]

According to the air conditioner for a rooftop vehicle of the present invention, the outlet of the refrigerant pipe can be easily changed over the entire circumference of the unit case. Therefore, even if the vehicle-side piping arrangement is different depending on the mounting position of the refrigerant compressor, the same rooftop unit can be used.
It is not necessary to prepare multiple types of rooftop units, and is more versatile than conventional rooftop-mounted vehicle air conditioners. Further, since the cover can be removed even after the rooftop unit is mounted, maintenance can be easily performed.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a unit case according to a first embodiment.

FIG. 2 is an overall schematic diagram of a rooftop unit (first embodiment).

FIG. 3 is a perspective view showing a state in which a rooftop unit is mounted (first embodiment).

FIG. 4 is a sectional view of a main part of a unit case according to a second embodiment.

FIG. 5 is a sectional view of a main part of a unit case according to a conventional technique.

[Explanation of symbols]

 2 Rooftop unit 3 Condenser fan (functional part) 4 Refrigerant condenser (functional part) 5 Evaporator blower (functional part) 6 Refrigerant evaporator (functional part) 7a Lower case (case) 7b Upper cover (cover) 14b No. 2 High-pressure piping (refrigerant piping) 15b Second low-pressure piping (refrigerant piping) S Piping space

Claims (1)

[Claims] 1. A rooftop installation type air conditioner for a vehicle, comprising: a packaged rooftop unit that integrally houses each functional component constituting a refrigeration cycle other than a refrigerant compressor and is installed on the roof of a vehicle. The rooftop unit includes a case that integrally houses the functional components, and has a pipe space of a refrigerant pipe connected to the refrigerant compressor on an outer periphery of the case.
A roof-mounted air conditioner for a vehicle, characterized in that the piping space is covered with a detachable cover with respect to the case.