JPH08142641A - Air conditioner for bus - Google Patents

Abstract

PURPOSE: To easily remove the fouling of an evaporator by moving the evaporator in a casing from the normal position to the washing position to allow the evaporator to be washed both from the face side and the back side. CONSTITUTION: When an evaporator 16 is washed, a screw 41 is turned back to remove an opening/closing lid 42, and then, the high pressure water is ejected from an opening 51 for examination and maintenance to wash the face side of the evaporator 16. After a screw 44 is turned back, a handle 49 is pulled to turn the evaporator 16 around a hinge 43 so as to be located in the washing position. The high pressure water is ejected against to wash the back side of the evaporator 16. Because the evaporator 16 can be washed both from the face and the back side, the fouling of the evaporator 16 can be easily removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bus air conditioner.

[0002]

2. Description of the Related Art An example of a conventional bus air conditioner is shown in FIGS. As shown in FIG. 3, the bus 10
An air conditioner unit 1 is mounted below 0. Cold air blowout ducts 4 extend in the front-rear direction on both sides near the ceiling in the passenger compartment 2, and warm air blowout ducts 6 extend in the front-rear direction on both sides near the inner floor of the passenger compartment 2.

During the cooling operation, the cold air generated in the air conditioner unit 1 branches through the underfloor duct 22, passes through the pair of rising ducts 3 and enters the cold air blowing duct 4, and the cold air blowing duct 4 has a predetermined interval before and after. It is blown into the vehicle interior 2 from the blow-off port 5 formed by separating.

During the heating operation, the warm air generated in the air conditioner unit 1 passes through the underfloor duct 22 and the rising duct 3 and enters the warm air blowing duct 6, and the warm air blowing duct 6 is spaced forward and backward by a predetermined distance. The air is blown into the vehicle interior 2 from the formed air outlet 8.

As shown in FIG. 4, a sub engine 10 is installed inside the air conditioner unit 1.
A compressor 11 and a condenser fan 12 are driven by 10.

When the compressor 11 is driven, the refrigerant discharged from the compressor 11 enters the condenser 13,
Here, the condenser fan 12 radiates heat to the outside air to condense and liquefy it. The liquid refrigerant enters the evaporator 16 via the receiver 14 and the expansion valve 15, where it is evaporated and vaporized by exchanging heat with the air inside the vehicle or the outside air blown by the evaporator fan 9, and then returns to the compressor 11.

Inside the casing 40, the evaporator 16,
A heater coil 18, an inside / outside air switching damper 19 and the like are housed. Inside / outside air switching damper while the evaporator fan 9 is operating
By switching 19 the air in the vehicle compartment is sucked in through the inside air inlet 20 and the outside air is sucked in through the outside air inlet 21 into the casing 40.

The air sucked into the casing 40 passes through the evaporator 16 and the heater coil 18 to become conditioned air. 37
When the vertical switching damper 7 is in the position shown by the broken line and the vertical switching damper 7 is in the position shown by the solid line when the vertical switching damper 7 is in the position shown by the broken line through the pair of rising ducts 3 Is sent to the hot air duct 6.

During heating operation, the sub-engine 10 is stopped, the fan motor 30 is driven, and the on-off valves 35, 36 are driven.
Is opened. As a result, a part of the high-temperature engine cooling water that has flowed out of the main running engine 32 is supplied to the heater coil 18 via the opening / closing valve 36 and the flow rate control valve 38, and the temperature is lowered by radiating heat there, and then the opening / closing valve 35 is opened. After that, it returns to the main engine 32. Most of the high-temperature engine cooling water is radiated by the radiator 34 to the outside air blown by the radiator fan 33, and then returns to the main engine 32.

When the fan motor 30 is driven,
The power from this is transmitted to the evaporator fan 9 via the drive shaft 26, the pulley 27, the belt 28, and the pulley 29 to rotate it. At this time, magnet clutch
25 is cut off.

The evaporator 16 and the heater coil 18 are shown in FIG.
As shown in, it is installed in a casing 40 that forms a ventilation path. The air conditioner unit 1 is mounted so that one side surface of the casing 40 faces one side surface of the vehicle body of the bus 100, as shown in FIG. An opening for inspection and maintenance is provided on this one side surface, and is covered with an opening / closing lid 42 that is detachably attached with a screw 41. When the evaporator 16 becomes dirty, the opening / closing lid 42 is removed, and high-pressure cleaning water is sprayed from the inspection and maintenance opening to the front side of the evaporator 16 to clean it.

[0012]

In the conventional air conditioner for a bus described above, when the evaporator 16 is washed, the washing water cannot be sprayed to the back side of the evaporator 16, that is, the side facing the heater coil 18. There was a risk that foreign matter would get stuck in the.

[0013]

The present invention has been invented to solve the above-mentioned problems, and the gist of the present invention is to install an evaporator in a casing forming a ventilation passage, A bus air conditioner in which an air conditioner unit including the casing is attached so that one surface of the casing faces one side surface of a vehicle body, wherein an evaporator in the casing is movably installed from its normal position to a cleaning position. Located in a bus air conditioner.

Another feature is that the evaporator is rotatably installed around its one end from its normal position to the cleaning position.

Still another feature is that the evaporator is installed via a rail guide so that it can be moved in parallel from its normal position to the cleaning position.

Still another feature is that a flexible pipe is interposed between a refrigerant inlet pipe and an outlet pipe to the evaporator and an expansion valve is fixed to the evaporator.

[0017]

In the present invention, the front side of the evaporator fan is washed at its normal position, and the back side of the evaporator fan is moved to the washing position for washing.

[0018]

EXAMPLE A first example of the present invention is shown in FIG.
Is a schematic plan view, and (B) is a perspective view of the evaporator.
One side end of the evaporator 16 is casing via a hinge 43.
It is attached to 40 and the other side end is a casing via screw 44
It has been concluded to 40. The expansion valve 15 is fixed to one end of the evaporator 16 and the handle 49 is attached to the other end.

Further, the refrigerant inlet pipe 45 has a flexible pipe 46.
And the flexible pipe 48 is connected to the refrigerant outlet pipe 47.
Is interposed. In addition, 18 is a heater coil, 9 is an evaporator fan, and 50 is a fan case. Other configurations are the same as those of the conventional apparatus shown in FIGS. 3 to 5, and corresponding members are designated by the same reference numerals.

However, the evaporator 16 is in the stationary state shown in FIG.
Although it occupies the normal position shown by the solid line in (A), when cleaning this, first screw back the screw 41 and remove the opening / closing lid 42, then inject high pressure water from the inspection and maintenance opening 51 to evaporate the evaporator. Wash the front side of 16. Next, after screwing back the screw 44, the gripper 49 is pulled to rotate the evaporator 16 around the hinge 43 to position it at the cleaning position indicated by the broken line in FIG. 1 (A). Therefore, high pressure water is sprayed on the back side of the evaporator 16 for cleaning.

Thus, since the evaporator 16 can be washed from both front and back sides, dirt on the evaporator 16 can be easily removed.

A second embodiment of the invention is shown in FIG. A pair of rails 52 are laid in parallel on the bottom plate of the casing 40, and the evaporator 16 is placed on the rails 52.

The top plate of the casing 40 has a cleaning hole.
53 is provided, and this cleaning hole 53 is closed by a lid 54 in a steady state. The other structure is similar to that of the first embodiment, and corresponding members are designated by the same reference numerals.

Although the evaporator 16 occupies the normal position shown by the solid line in the figure in the steady state, the evaporator 16
For cleaning, the screw 41 is unscrewed to remove the opening / closing lid 42, and high-pressure water is sprayed from the inspection / maintenance opening 51 to clean the front side of the evaporator 16.

Next, the evaporator 16 is moved in parallel along the rail 52 to be positioned at the cleaning position shown by the broken line in the figure. Then, the lid 54 is removed, and the back side of the evaporator 16 is washed through the cleaning hole 53.

Thus, since the evaporator 16 can be washed from both the front and back sides, the dirt can be easily removed. Although the cleaning hole 53 is provided in the top plate of the casing 40 in the above embodiment, it may be provided in the bottom plate or the side plate.

[0027]

According to the present invention, the front side of the evaporator is cleaned at its normal position and the back side is moved to the cleaning position for cleaning. As a result, the evaporator can be washed from both the front and back sides, so that the dirt can be easily removed.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention, (A) is a schematic plan view of a casing, and (B) is a perspective view of an evaporator.

FIG. 2 is a schematic plan view of a casing showing a second embodiment of the present invention.

FIG. 3 is a perspective view of a conventional bus air conditioner.

FIG. 4 is a schematic system diagram of a conventional bus air conditioner.

FIG. 5 is a schematic perspective view of a conventional casing.

[Explanation of symbols]

 40 Casing 15 Expansion valve 16 Evaporator 43 Hinge 45 Refrigerant inlet pipe 47 Refrigerant outlet pipe 46, 48 Flexible pipe

Claims (4)

[Claims] 1. A bus air conditioner in which an evaporator is installed in a casing forming a ventilation passage, and an air conditioner unit including the casing is attached so that one surface of the casing faces one side surface of a vehicle body. An air conditioner for a bus, in which an evaporator inside is installed so as to be movable from its normal position to a cleaning position. 2. The bus air conditioner according to claim 1, wherein the evaporator is installed so as to be rotatable about its one end from its normal position to the cleaning position. 3. The air conditioner for a bus according to claim 1, wherein the evaporator is installed via a rail guide so that the evaporator can be moved in parallel from a normal position to a cleaning position. 4. The air conditioner for a bus according to claim 1, wherein a flexible pipe is interposed between a refrigerant inlet pipe and an outlet pipe to the evaporator and an expansion valve is fixed to the evaporator.