JPH05270245A - Air-conditioner for bus - Google Patents

Abstract

PURPOSE:To enhance the reliability by suppressing overheating of a controling electric components of an air-conditioner for bus. CONSTITUTION:The indoor unit 1 of an air-conditioner for bus includes a case 2, and a control box 10 accommodating electric components for controlling the air-conditioner is installed in the dead space generated when this case 2 is installed. The control box 10 is provided with an air suction hole 11 and exhaust hole 12 which are open to inside of this case 2 where an evaporator 6 and heater core 7 are accommodated, and through these holes the air- conditioning air is fed into the control box 10 to suppress overheating of electric components therein.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner control box arrangement for a bus vehicle air conditioner.

[0002]

2. Description of the Related Art A control box 10 containing electric parts such as a computer and a relay for controlling an air conditioner for a bus vehicle.
Is installed in the luggage compartment 20 of the bus vehicle 100, as shown in FIG.

[0003]

On the other hand, if the control box 10 is installed in the luggage compartment 20 of the bus vehicle 100, the control box 10 will be operated in summer when the temperature is high.
There is a problem that the inside temperature becomes high due to the outside air temperature and the self-heating of the electric parts, and the reliability of the electric parts deteriorates. Furthermore, since the control box 10 is installed in the luggage compartment 20,
There is a problem that the control box 10 becomes an obstacle when carrying in and carrying out luggage so that it cannot be carried out smoothly.

The present invention has been made in view of the above problems, and by installing a control box by utilizing a dead space around an air conditioning case of an indoor unit of a bus vehicle air conditioner, reliability of electric parts can be improved. The purpose is to improve and facilitate the loading and unloading of luggage in the luggage room.

[0005]

In order to achieve the above object, the present invention provides an air conditioning case having an air inlet and an air outlet, and a refrigerant evaporator in the air conditioning case which absorbs heat from the surroundings. In a bus vehicle air conditioner including an indoor unit that includes at least an air blower that sucks air from the suction port, passes through the refrigerant evaporator, and blows air from the air outlet, when the air conditioning case is installed, While arranging the control box of the air conditioner in the resulting dead space,
This control box uses technical means having a structure provided with an air inlet and an air outlet opened in the air conditioning case.

[0006]

According to the above-mentioned means, the control box is arranged in the dead space that occurs when the air conditioning case of the indoor unit is installed, and the air conditioning is performed in the control box through the intake port and the exhaust port provided in the control box. Since air circulates, overheating of the electrical components inside the control box is prevented. Further, since the control box is not installed in the luggage compartment, there are no obstacles in loading and unloading the luggage.

[0007]

The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 is a perspective view of an indoor unit of an air conditioner for a bus vehicle according to the present invention, and FIG. 2 is a schematic sectional view of the indoor unit.

1 and 2, reference numeral 2 denotes an air conditioning case of the indoor unit 1. The air conditioning case 2 has an air intake port 3 and an air outlet port 4, and the air intake side has an air intake port 3. A blower 5 is attached which sucks air from the suction port 3 and blows air from the blowing port 4.

In the air-conditioning case 2, there are provided a refrigerant evaporator (hereinafter referred to as an evaporator) 6 which constitutes a later-described refrigerant circuit for evaporating the refrigerant and absorbing heat, and a later-described hot water circuit for conducting and radiating heat of hot water. The constituent radiator (hereinafter, referred to as a heater core) 7 is attached in an inclined manner in consideration of the heat exchange rate, the drainage property of dehumidified water, the pressure loss, and the like.

FIG. 3 is a refrigerant circuit diagram and a hot water circuit diagram in a bus vehicle air conditioner. In FIG. 3, the refrigerant circuit 6
As is well known, 0 is a compressor 62, a condenser 63,
Receiver 64, super cooler 65, dryer 66, exhaust pan 67, evaporator 6 described above, compressor 62
And are connected in sequence. Incidentally, 61 is an auxiliary engine for driving the compressor 62, and 68 is a receiver 64.
Bypass valve that returns the gas refrigerant of
69 is a radiator which radiates the cooling water of the auxiliary engine 61.

On the other hand, as is well known, the hot water circuit 70 is sequentially connected to a vehicle engine 71, a water pump 72, a filter 73, a hot water solenoid valve 74, a preheater 75, the above-mentioned heater core 7, a defroster core 76, and a vehicle engine 71. Is configured. Reference numeral 77 is a manual stop valve that stops circulation of hot water.

By the way, the conventional bus vehicle air conditioner is
As shown in FIG. 5, since the evaporator 6 and the heater core 7 are attached to be slanted in the air conditioning case 2, the lower surface of the air conditioning case 2 is slanted so that the wind can smoothly flow over the entire surfaces of the evaporator 6 and the heater core 7. Therefore, the dead space S is generated accordingly.

Therefore, in the present invention, as shown in FIGS. 1 and 2, the control box 1 conventionally installed in the luggage compartment.
0 is installed in the dead space S, and thus the indoor unit 1 is configured. In order to flow conditioned air into the control box 10, the control box 10 is provided with an air inlet 11 and an air outlet 12 opened in the air conditioning case 2.

FIG. 4 is a perspective view of the above-mentioned indoor unit mounted on a bus vehicle. Conventionally, the luggage compartment 2 of the bus vehicle 100 is shown.
As shown in FIG. 4, the control box 10 installed in the 0 is attached to the lower part of the front surface of the air conditioning case 2 and accommodated in the bus vehicle 100.

Next, the operation of the above embodiment will be described. In FIG. 2, the air in the vehicle compartment is introduced into the air conditioning case 2 through the suction port 3 by the operation of the blower 5. In the summer when the outside temperature is high, the introduced air is cooled by the evaporator 6 (in this case, the hot water circulation of the hot water circuit 70 in FIG. 3 is stopped, and the hot water flows to the heater core 7). No), and the cold air shown by the arrow C is blown into the vehicle interior from the air outlet 4 via the cold air duct (not shown), and the vehicle interior is cooled.

In this case, as shown by the arrow B, the suction port 1
Since the conditioned air is introduced into the control box 10 from 1 and discharged from the outlet 12, the electric parts (not shown) in the control box 10 are cooled by the conditioned air indicated by the arrow B, so that in the summer season. The overheating of electrical components can be suppressed.

On the other hand, in the winter when the outside temperature is low, the introduced air indicated by the arrow A is heated by the heater core 7 (in this case, the refrigerant circulation of the refrigerant circuit 60 in FIG. 3 is stopped, The refrigerant does not flow into the evaporator 6), and becomes warm air shown by an arrow C and is blown into the vehicle interior from the air outlet 4 through a warm air duct (not shown) to heat the vehicle interior.

Therefore, the control box 10 is the same as described above.
Since the electric parts inside are heated by the conditioned air of arrow B, the supercooling of the electric parts in the winter is suppressed.
Since the control box 10 is not installed in the luggage compartment 20 as in the conventional case, loading and unloading of luggage is facilitated, and the trouble of wiring the control box 10 is eliminated.

Next, in this embodiment, the control box 10 is arranged in the dead space S below the front part of the air conditioning case 2, but the control box 10 is arranged in the dead space created by the installation of the air conditioning case 2. It may be arranged anywhere as long as there is a space available.

Further, although the blower 5 is provided on the suction side of the air conditioning case 2 in the present embodiment, it may be provided on the blowout side,
The point is that the air-conditioning case 2 can be blown in the direction from the suction port 3 to the air outlet 4.

Although the present embodiment is applied to the indoor unit 1 having the evaporator 6 and the heater core 7, it is of course applicable to the indoor unit having only the evaporator 6 and not having the heater core 7.

[0022]

Since the present invention is constructed as described above, overheating of the electric parts in the control box of the air conditioning system for bus vehicles is prevented, and the reliability of the electric parts is improved. Since the control box, which was an obstacle in the luggage compartment of the bus vehicle, is eliminated, luggage can be loaded and unloaded more smoothly.

[Brief description of drawings]

FIG. 1 is a perspective view of an indoor unit of an air conditioner for a bus vehicle according to the present invention.

FIG. 2 is a schematic cross-sectional view of the indoor unit of FIG.

FIG. 3 is a refrigerant circuit diagram and a hot water circuit diagram of the bus vehicle air conditioner.

FIG. 4 is a perspective view showing a control box mounted on a bus vehicle.

FIG. 5 is a transparent perspective view of an indoor unit of a conventional air conditioner for a bus vehicle.

FIG. 6 is a perspective view of a conventional control box mounted on a bus vehicle.

[Explanation of symbols]

 1 Indoor Unit 2 Air Conditioning Case 3 Suction Port 4 Blowout Port 5 Blower 6 Evaporator (Refrigerator Evaporator) 7 Heater Core (Radiator) 10 Control Box 11 Control Box Inlet 12 Control Box Outlet S Dead Space

Claims (1)

[Claims] 1. An air-conditioning case having an air inlet and an air outlet, a refrigerant evaporator in the air-conditioning case that absorbs heat from the surroundings, and air is sucked from the inlet and passed through the refrigerant evaporator. In a bus vehicle air conditioner equipped with at least an indoor unit consisting of a blower that blows air from a blowout port, with a control box of the air conditioner disposed in a dead space that occurs when the air conditioning case is installed, An air conditioner for a bus vehicle, characterized in that the control box is provided with an air inlet and an air outlet opened in the air conditioning case.