JPS6310326Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an air conditioner used in a bus.

Generally, this type of air conditioner consists of a heater unit consisting of a heater core, blower, etc., a cooling unit consisting of a compressor, condenser, blower, evaporator, etc., and air supplied from these units. These units have been placed at appropriate positions on the bus body.

For example, the heater core, blower, etc. of the heater unit are placed under the floor of the bus, the evaporator, blower, etc. of the cooling unit are placed under the floor, and the condenser is placed under the floor or ceiling of the bus. It's coming.

In such an air conditioner, the heater units of the heater units are It is desirable that the core, blower, evaporator, condenser, blower, etc. of its cooling unit be concentrated on the rearmost side of the vehicle body.

Therefore, in recent years, air conditioning systems have been proposed in which the heater core and blower of the heater unit, and the evaporator, condenser, blower, etc. of the cooling unit are located centrally at the rear of the bus body. It has been done.

However, if the components of the heater and cooling unit are concentrated at the rearmost side of the vehicle body, it obstructs the rear view, making it difficult to check the safety of the rear when the bus is backing up. There was a tendency to

The purpose of this invention is to provide heating, cooling, and ventilation functions in the vehicle interior, to effectively utilize the space in the vehicle body, and to provide heating, cooling, and ventilation functions for the vehicle interior.
An air conditioner used in buses that reduces the propagation of noise generated by ventilation into the passenger compartment, and also ensures good visibility to the rear, making it easy to check the safety of the rear when reversing. It is provided by.

With these issues in mind, the air conditioner used in the bus of this invention is located at the rear of the bus and above the rear window glass, and is located on the outer roof panel, inner roof panel, and an outside air intake formed from a portion of the rear panel and opening in the outer roof panel; an outside air outlet opening in the rear panel in relation to the outside air intake; and
a casing comprising a cabin air intake opening in its inner loop panel in relation to the outside air intake and the outside air outlet; at the front, a heater unit with a heater core and a blower disposed within its casing, a condenser, an evaporator, and a compressor, the condenser being adjacent to its outside air outlet;
The evaporator directs air passing through the cooling unit, the heater core, and the evaporator located in the casing, respectively, in front of the outside air intake, outside air outlet, and cabin air intake. Air ducts and heaters are placed in front of the casing on the ceiling side of the bus to lead into the interior of the bus.
Extending from the outer roof panel toward the cabin air intake in the casing behind the core, blower, and evaporator and in front of the outside air intake and condenser. and a butterfly valve that is rotated between the passenger compartment air intake and the partition plate.

Hereinafter, preferred specific examples of the air conditioner used in buses according to this invention will be described with reference to the drawings.

FIGS. 1 and 2 show a specific example 10 of the air conditioner used in a bus according to this invention.

The air conditioner 10 is located at the rear of the bus 38,
and located above the rear window glass 40, the outer roof panel 41, the inner roof panel 42, and the rear panel 4.
The outside air intake 1 is formed from the parts 3 and opened in the outer roof panel 41.
6. Its rear air intake in relation to its outside air intake 16
The outside air outlet 17 opened in the panel 43, and its outside air intake 16 and outside air outlet 17.
The casing 11 is provided with the cabin air intake 18 opened in the inner roof panel 42 in relation to the casing 11 , the outside air intake 16 , the outside air outlet 17 , and the area in front of the cabin air intake 18 . , a heater arranged inside the casing 11.
The heater unit 12 includes a core 19 and a blower 20, a condenser 21, an evaporator 22, a compressor (not shown), and a heat dissipation fan 24 for the condenser 21. adjacent to the outside air outlet 17, the evaporator 22 is located in front of the outside air intake 16, the outside air outlet 17, and the vehicle interior air intake 18, and
The heat dissipation fan 24 supplies the air that has passed through the cooling unit 13, which is disposed in the casing 11 adjacent to the outside air intake 16, the heater core 19, and the evaporator 22, into the passenger compartment of the bus 38. At the front of the casing 11, the ceiling 3 of the bus 38 is
In the air duct 14 disposed within the casing 11 behind the heater core 19, blower 20, and evaporator 22 and in front of the outside air intake 16 and the condenser 21, , a partition plate 28 extending from the outer roof panel 41 toward the cabin air intake 18 side, and a butterfly valve 15 rotated by the cabin air intake 18 and the partition plate 28. , and an actuator 27 for rotating the butterfly valve 15.

The casing 11 is attached to the ceiling 3 of the bus 38.
9, and the rear portions of the outer roof panel 41 and inner roof panel 42 made of steel plates, which constitute the ceiling 39, are drawn upward and downward, respectively. , is arranged behind the ceiling 39 and above the rear window glass 40.

Of course, the rear window glass 40 has a predetermined size that allows sufficient visibility to the rear.
The casing 11 is fitted into the rear part of the vehicle body.
the rear window glass 40 so as not to obstruct the view through the rear window glass 40.
It is placed higher than.

The casing 11 also serves as a heater unit 12 and a cooling unit 1, which will be described later.
Since the third component is placed inside, it is preferable to have a split type structure or a structure in which a predetermined portion can be opened.

In such a casing 11, an outside air intake 16, an outside air outlet 17, and a vehicle interior air intake 18 are formed in the upper portion, the rear portion, and the lower portion, respectively.

The outside air intake port 16, the outside air discharge port 17, and the vehicle interior air intake port 18 are each configured in a louver shape.

Furthermore, a partition plate 28 is formed on the inner surface of the upper portion of the casing 11 and extends from the front edge of the outside air intake port 16 toward the vehicle interior air intake port 18 side.

The heater unit 12 includes a heater core 19,
The heater core 19 and the blower 20 are connected to the casing 1.
1, they are each arranged on the front side of the partition plate 28.

Of course, the heater core 19 is connected to the bus 38.
It is connected via piping (not shown) to the coolant outlet side of the internal combustion engine mounted on the engine.

Further, the coolant circuit of the internal combustion engine is provided with a preheating device (not shown) including a combustor. Since the preheating device is configured similarly to a preheating device used in an existing air conditioner, a description of its configuration will be omitted.

The cooling unit 13 includes a compressor (not shown), a condenser 21, an evaporator 22, and the condenser 21.
Therefore, it is composed of a heat dissipation fan 24 consisting of a motor 25 and a fan 26, a blower, and the like. The blower has its heater unit 12.
A blower 20 is also used, and its condenser 21, evaporator 22, and heat dissipation fan 24 are respectively arranged within the casing 11.

That is, the condenser 21 is located near the outside air outlet 17, and the evaporator 22 is located near the heater core 19.
A heat dissipation fan 24 is located between the
are arranged near the outside air intake port 16, respectively.

The compressor of the cooling unit 13 is located near the internal combustion engine, in the so-called engine room.

Of course, the condenser 21 and evaporator 22
is connected to the compressor via piping (not shown) so that the refrigerant can be circulated, and the piping includes a receiver (not shown) and an expansion valve (not shown). Each is provided.

The above-described heater unit 12 and cooling unit 13 are connected to a heater switch (not shown) and a cooler switch located near the driver's seat of the bus 38, similar to those in existing air conditioners. Of course, it is driven by an operation (not shown).

The air duct 14 is disposed extending in the length direction of the bus 38 between the outer and inner roof panels 41 and 42 that constitute the ceiling 39, and has one end connected to the blower of the blower 20. connected to the casing. Of course, the inner roof panel 42 of the ceiling 39 has
A plurality of air outlets 2 are provided at appropriate intervals in the length direction.
3 is formed, and its air outlet 23 is
Each is connected to the duct 14.

Butterfly valve 15 connects outside air intake 1
6, and adjusts the amount of air sucked into the blower 20 side from the vehicle interior air intake port 18, and one end is connected to the shaft 32 in the casing 11.
Rotatably mounted through.

The other end of the butterfly valve 15 is fitted with a seal 37 that can be brought into contact with the vicinity of the front edge of the cabin air intake 18 and the lower end of the partition plate 28.

Further, the butterfly valve 15 is provided with a lever 33 on one end side, and by rotating the lever 33, the butterfly valve 15 is rotated.

The actuator 27 is a pneumatic cylinder disposed within the casing 11 in order to rotate the butterfly valve 15, and includes a cylinder 29 whose one end is connected to the casing 11 side via a pin 35, and a cylinder 29 inside the cylinder 29. A piston 30 arranged to be able to reciprocate and slide; a push rod 31 having one end fixed to the piston 30 and the other end passing through the other end of the cylinder 29 and connected to the lever 33 with a pin; The cylinder 29 is pressed so as to press the piston 30 against the pin 35 side.
and a return spring 34 disposed within.

Of course, the pneumatic piping 36 connected to the cylinder chamber of the cylinder 29 is connected to an air tank (not shown) serving as an air pressure supply system, and a solenoid valve is connected between the cylinder chamber and the air tank. (not shown) is inserted, and a control switch (not shown) located near the driver's seat of the bus 38 is further inserted into the electrical circuit of the solenoid valve.

Accordingly, in response to the operation of the control switch, compressed air is sent to the cylinder chamber, the piston 30 is slid against the return spring 34, and the butterfly valve 15 is rotated.

Although the actuator 27 has been described as a pneumatic cylinder, it is also possible to use a hydraulic cylinder, a servo motor, or the like.

Next, the operation of the air conditioner 10 described above will be explained.

First, when heating the interior of the bus 38,
The actuator 27 rotates the butterfly valve 15 upward and opens the cabin air intake 18.
to open.

In such a state, when the heater unit 12 is driven and the blower 20 is rotated, the air inside the vehicle interior is sucked into the heater core 19 side from the interior air intake port 18, and the air is transferred to the heater core 19 side. - Air is heated by heat exchange when passing through the core 19, and the thus heated air is sent into the duct 14 by the blower 20.

Therefore, hot air is blown into the vehicle interior from the air outlet 23 in the ceiling 39 of the bus 38, thereby warming the vehicle interior.

Of course, if the butterfly valve 15 is rotated downward and the passenger compartment air intake 18 is placed in the closed state as shown in FIGS. The heated air is sucked in from the air, heated by the heater core 19, and blown out from the air outlet 23 into the vehicle interior in substantially the same manner as in the case described above.

Further, depending on the degree of opening and closing of the butterfly valve 15, the amount of air inside the vehicle and outside air drawn into the heater core 19 side is adjusted, and hot air is blown out from the outlet 23 at the same time as ventilating the interior of the vehicle. is also possible.

When cooling the interior of the bus 38, the butterfly valve 15 is rotated upward to open the interior air intake port 18, as in the case of heating.

In such a situation, the cooling unit 13
When the blower 20 is driven and the blower 20 is rotated, the air inside the vehicle is sucked into the evaporator 22 from the interior air intake port 18.
2, the air is cooled by heat exchange and is sent into the duct 14 by the blower 20.

Therefore, cold air is blown into the vehicle interior from the air outlet 23 in the ceiling 39 of the bus 38, thereby cooling the vehicle interior.

Of course, as in the case of heating described above, when the butterfly valve 15 is rotated downward and the cabin air intake 18 is closed, outside air is drawn from the outside air intake 16. The air is sucked in, cooled by the evaporator 22, and cooled air is blown into the vehicle interior.

Furthermore, depending on the degree of opening and closing of the butterfly valve 15, the amount of air inside the vehicle and outside air drawn into the evaporator 22 is adjusted, and cool air is blown out from the outlet 23 at the same time as ventilating the interior of the vehicle. .

When the cooling unit 13 is driven in this way, the heat radiation fan 24 is of course always rotating, and the gas refrigerant in the condenser 21 is cooled by the heat radiation fan 24. , liquefied. Therefore, the heat radiation fan 24
Air that passes through the condenser 21 from the side and undergoes heat exchange is discharged from the air outlet 17 to the outside of the vehicle interior.

If only the interior of the bus 38 is to be ventilated, the butterfly valve 15 is rotated downward to close the interior air intake 18 and the blower 2 is closed.
0 is rotated.

Therefore, the outside air blown in from the outside air intake port 16 is sent to the duct 14 by the blower 20, and further, the outside air is blown into the vehicle interior from the outlet 23, thereby ventilating the vehicle interior.

In addition, since the casing 11 is located above the rear window glass 40, it does not obstruct the view through the rear window glass 40, and when the bus 38 is backing up, the rear safety can be confirmed. is easily done.

Further, the casing 11 is connected to the bus 38
Since the blower 20 and the heat dissipation fan 24 are disposed on the rear side of the ceiling 39, the noise generated by the rotation of the blower 20 and the heat dissipation fan 24 is difficult to propagate into the vehicle interior, and the noise level in the vehicle interior is reduced.

According to the above idea, the casing is located on the ceiling side at the rear of the bus, and the rear window
The heater core and the blower of the heater unit and the condenser and evaporator of the cooling unit are respectively arranged in the casing, and the partition plate is located above the glass. and in that casing behind the evaporator and ahead of the outside air intake and condenser of the casing,
The butterfly valve is extended from the outer roof panel of the ceiling toward the cabin air intake side of the casing, and the butterfly valve is rotated between the cabin air intake and the partition plate. Heating and cooling are performed, and if a single butterfly valve is rotated during heating and cooling, the heater and
The amount of air inside the vehicle and outside air drawn into the core and evaporator side is regulated, and the interior of the vehicle can be ventilated at the same time as heating and cooling the interior of the vehicle.
As the so-called ventilation function is provided and a single butterfly valve 15 is used, the internal structure of the casing is simplified, the increase in manufacturing costs is suppressed, and furthermore, the vehicle body It is possible to make effective use of space in heating, cooling,
It also makes it difficult for the noise generated by ventilation to propagate into the passenger compartment, and also ensures good visibility to the rear, making it easy to check the safety of the rear when backing up the bus, making it extremely practical. .

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a specific example of an air conditioner used in a bus according to the present invention, and FIG. 2 is an enlarged sectional view showing the state in which a butterfly valve is installed. 10...Air conditioner used in buses, 11
...Casing, 12...Heater unit, 1
3...Cooling unit, 14...Air duct, 15...Butterfly valve, 16...Outside air intake, 17...Outside air outlet, 18...Interior air intake, 19...Heater core , 20...
...Blower, 21...Condenser, 22...Evaporator, 3
8... Bus, 39... Ceiling, 40... Rear window glass.

Claims (1)

[Claims for Utility Model Registration] Located at the rear of the bus and above the rear window glass, formed from parts of an outer roof panel, an inner roof panel, and a rear panel, and , an outside air intake opening in the outer roof panel, an outside air outlet opening in the rear panel in connection with the outside air intake; and an outside air outlet opening in the rear panel in connection with the outside air intake; A casing with a cabin air intake opening in the inner roof panel; an outside air intake, an outside air outlet, and a heater core disposed within the casing in front of the cabin air intake. and a heater unit having a condenser, an evaporator, and a compressor, the condenser being adjacent to the outside air outlet, and the evaporator being adjacent to the outside air intake, the outside air outlet, and the vehicle. A cooling unit located in front of the casing, and a heater core and an evaporator located in the casing in front of the interior air intake, and a cooling unit in front of the casing so as to direct the air passing through the heater core and the evaporator into the passenger compartment of the bus. The air duct located on the roof side of the bus and its outer casing behind the heater core, blower, and evaporator and in front of the outside air intake and condenser. An air conditioner used in a bus, including a partition plate extending from a roof panel toward the cabin air intake side, and a butterfly valve that is rotated between the cabin air intake and the partition plate. .