JPH0764181B2 - Auxiliary engine driven air conditioner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner in which a compressor is driven by an auxiliary engine during cooling, and particularly, a fan for blowing air is driven by energization during heating to cool the air conditioner. The present invention relates to an auxiliary engine drive type air conditioner improved so as to include a power generation type electric motor which is sometimes generated by an auxiliary engine.

[Prior Art] Conventionally, in an air conditioner for a large-sized vehicle, particularly a bus, a fan is driven to rotate by an electric motor to supply warm air into a vehicle compartment through a heater core during heating. In addition, during cooling, the compressor is driven by the auxiliary engine, and the electric motor is forcibly rotationally driven via the belt and pulley mechanism. By the forced rotation of the electric motor, the fan is rotated and cold air is supplied into the vehicle compartment through the evaporator.

[Problems to be Solved by the Invention] In this way, during cooling, the electric motor is only forced to rotate by the auxiliary engine, so to speak, it plays only the role of the conduction shaft for the fan, and the original function is not exerted and power is not exerted. There is a possibility that the effective use of the will not be made.

The present invention has been made in order to improve the above-mentioned points, and a motor for supplying cool air and hot air to a target area for air conditioning by a fan during an air conditioning operation is composed of a generator type electric motor to generate electric power during cooling, and An object of the present invention is to provide an auxiliary engine-driven air conditioner that exhibits excellent effects such as being able to drive electric equipment and effectively utilizing power.

[Means for Solving Problems] The present invention provides a compressor driven by an auxiliary engine during cooling operation, an evaporator in which a refrigerant is circulated by the compressor, and cool air through the evaporator during cooling. A fan that supplies hot air to the air conditioning target portion via a heater core during heating and a generator motor that drives the fan to rotate by energization during heating while generating power by the auxiliary engine during cooling The present invention employs a configuration in which related electric devices are driven by electric power generated from the generator motor during cooling.

[Operation] According to the present invention configured as described above, electric power is generated by driving the generator motor to rotate by the auxiliary engine during cooling operation, and related electric equipment can also be driven to realize effective use of power. It will be.

[Effect of the Invention] According to the present invention, since the auxiliary motor drives the generator motor to rotate during cooling, it is possible to drive the related electric equipment with the electric power generated by the auxiliary engine, thereby effectively utilizing the power. It is possible to provide an excellent auxiliary engine driven air conditioner.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 schematically shows an air conditioner A for a large vehicle, for example, a bus, according to the first embodiment. In FIG. 1, reference numeral 1 is a bus auxiliary engine, and the auxiliary engine 1 is provided with a drive shaft 1a. A pulley 2 and a cooling fan 3 are fitted on the drive shaft 1a. Reference numeral 4 denotes a compressor driven by the auxiliary engine 1, the discharge side of which is a condenser 5, a receiver 6,
A supercooler 7 and an expansion valve E as a refrigerant expansion means are connected in series in order to the inlet a of the evaporator 8. The outlet b of the evaporator 8 is connected to the compressor 4 on the suction port side. The evaporator 8 is arranged in the cooler case 10 together with the heater core 9. The cooler case 10 has an intake port 12 formed so as to face the interior of the vehicle, and an exhaust port (not shown) communicating with the interior of the vehicle via the air passage 10a.

On the other hand, 13 is a double shaft type generator-type electric motor, and in detail, as shown in FIG. 2, a stator 15 made of ferrite magnet is arranged in a yoke 14, and a rotor 16 is arranged inside. A rotary shaft 17 fitted and supported by bearings 17a, 17a is provided coaxially. A pulley 19 is fitted to one end of the rotary shaft 17 via an electromagnetic clutch 18. This pulley 19 is a belt
It is connected to the pulley 2 of the auxiliary engine 1 by 20.
The other end of the rotating shaft 17 is connected to the fan 23 via the universal joint 21 and the transmission shaft 22. The fan 23 is arranged in a casing 24 communicating with the cooler case 10. The generator type electric motor 13 is configured to be electrically connected and disconnected by the power source of the storage battery 25 via the change-over switch 26. Further, the generator motor 13 is connected to the motor 27 by a switch 28.
It is connected to the circuit via. The switch 28 is controlled to be turned on and off based on a temperature sensor (not shown) provided inside the vehicle during cooling. Further, the electric motor 27 has a fan 29 fitted to the rotary shaft 27a to form a blower 30. This blower 30 is arranged so as to face the supercooler 7, and forms the related electric equipment 31 of this example.

The air conditioner A configured as described above is arranged as shown in FIG. 3 and is positioned in the space under the floor of the bus B so as to be substantially immediately after the front wheel 32 (see FIG. 4). In FIG. 3, 33 is an air cleaner, 34 is a bypass valve, 35 is a preheater, 36 is a temperature fuse, 37 is an outside air sensor,
38 is a dryer and 39 is a reserve tank. Also, the fifth
In the figure, 40 is an outside air inlet, and 41 is a floor plate of the bus B.

Next, the operation of the embodiment configured as described above will be described.

First, in the heating operation of the passenger compartment, the auxiliary engine is not driven and remains in the stopped state, the changeover switch 26 is turned on, and the generator motor 13 is energized. In this case, since the electromagnetic clutch 18 is turned off, only the conduction shaft 22 is rotated by energization of the generator motor 13 to drive the fan 23. By driving the fan 23, the air in the vehicle compartment passes through the heater core 9 sucked into the cooler case 10 from the suction port 12 as shown by the arrow in FIG. Supplied into the passenger compartment.

Further, during the cooling operation, the auxiliary engine 1 is driven, the compressor 4 is driven, and the fan 3 is rotated together with the pulley 2 via the drive shaft 1a. At this time, the changeover switch 26 for the storage battery 25 is off, and the electromagnetic clutch 18 is on. Compressor 4 here
The refrigerant is pressure-fed from the discharge side to the supercooler 7 by the drive of, and then the inlet a through the receiver 6 and the supercooler 7.
Enters the evaporator 8 from the outlet b through the suction side to the compressor 4
Then, the refrigerant is circulated. On the other hand, the rotation of the pulley 2 of the drive shaft 1a is transmitted to the pulley 19 via the belt 20,
The electromagnetic clutch 18 causes the rotor 16 to rotate together with the rotating shaft 17. The rotation of the rotor 16 and the magnetic field from the stator 15 made of a ferrite magnet generate electric power in the generator motor 13, while the rotation of the rotating shaft 17 drives the fan 23 via the conduction shaft 22. . By driving the fan 23, the air in the vehicle compartment is sucked into the cooler case 10 through the suction port 12 as shown by the arrow in FIG. 5, flows through the air passage 10a through the evaporator 8 and is supplied into the vehicle compartment through the air outlet. It

During such cooling operation, the temperature sensor controls the switch 28 to be turned on / off depending on the temperature inside the vehicle compartment. When the switch 28 is in the ON state, the electric motor 27 is supplied with electric power by the electric power generated by the generator motor 13 to start up and drive the fan 29. As a result, the supercooler 7 is cooled, so that the refrigerant in the supercooler 7 is in a supercooled state. Therefore, the cooling capacity (enthalpy) of the evaporator 8 increases, and the evaporator 8 further cools the air. Therefore, in this case, lower temperature air is supplied to the vehicle interior, and the insufficient cooling condition is eliminated.

As described above, since the generator motor 13 is originally provided as a drive source of the fan 23 for blowing air, the fan 23 is rotationally driven during cooling, and at the same time, electric power is generated by power generation, and the super cooler 7 is used in the above embodiment. The related electric equipment 31 can be driven as if cooled by the blower 30. Therefore, unlike the conventional technique in which the electric motor is forced to rotate by the auxiliary engine during cooling, the power is not wasted and the power can be effectively used.

FIG. 6 shows a second embodiment of the present invention. In this embodiment, the joint 21 is eliminated and the electromagnetic clutch is eliminated.
Generator motor 13 with straight transmission shaft 22 via 18
Is connected to the rotating shaft of. The pulley 45 of the motor 13 is a belt
It is connected to the pulley 47 of the fan 23 by 46. Even with this structure, the same effect as that of the first embodiment can be obtained.

FIG. 7 shows a third embodiment of the present invention. The third embodiment is applied to recharging the storage battery 50 instead of the blower 30 of the first embodiment.

FIG. 8 shows a fourth embodiment of the present invention. In the fourth embodiment, the storage battery 5 of the third embodiment is replaced by a lamp 51 for displaying a cooling operation or illuminating the vehicle interior.

FIG. 9 shows a fifth embodiment of the present invention. In the fifth embodiment, the drive shaft 52 of the auxiliary engine 1 is replaced by the shaft of the fan 23.
53 Arranged coaxially. The drive shaft 52 is a clutch
It is connected to the shaft 53 via 54 and a pulley 55. The pulley 55 is connected to the pulley 19 of the generator motor 13 by a belt 56.

In the second to fifth embodiments, the same parts as those in the first embodiment are designated by the same reference numerals, and only different parts will be described.

In each of the above-described embodiments, the condenser 5 and the supercooler 7 are formed separately, so that the degree of freedom of arrangement in the lower space of the floor is increased unlike the case where these are integrally formed. It is a thing.

Although the stator 15 of the generator motor 13 is formed of a ferrite magnet in each of the above embodiments, the stator 15 is not limited to this and may be formed of a permanent magnet or the like. Further, in each of the above-described embodiments, the vehicle-related member 31 is composed of the blower 30 and the supercooling condenser 7, but the invention is not limited to this structure and may be as follows. That is, since an expansion valve is generally attached in front of the inlet a of the evaporator 8, a servomotor for adjusting the valve body of this valve is provided, and electric power from the generator motor is supplied to this servomotor. It may be configured as.

Further, the switch 28 may be configured not only to be automatically turned on / off depending on the temperature inside the vehicle compartment but also to be manually turned on / off as desired by a manual operation.

Further, according to the present invention, the auxiliary engine can perform the cooling operation even when the main engine is stopped, and of course, when the main engine is stopped, the electric power of the generator motor 13 can be used to illuminate the interior of the vehicle or the like. It is a thing.

In addition, in concrete application, various modifications can be made without departing from the scope of the present invention.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a schematic configuration diagram of an air conditioner, FIG. 2 is a cutaway front view showing only a half of a generator-type motor in a sectional view, and FIG. FIG. 4 is an overall perspective view showing an installation state of the air conditioner with respect to a bus as a vehicle, FIG. 5 is a longitudinal sectional view of an essential part, and FIG. FIG. 7 is a view corresponding to FIG. 1 of the embodiment, FIG. 7 is a view corresponding to FIG. 1 of the third embodiment, and FIG.
The drawing is equivalent to FIG. 1 of the fourth embodiment, and FIG. 9 is equivalent to FIG. 1 of the fifth embodiment. In the figure, A ... Air conditioner, 1 ... Auxiliary engine, 4 ...
… Compressor, 7 …… Super cooler, 8 …… Evaporator, 9 ……
Heater core (heat exchanger), 13 ... Generator motor, 15 ...
Ferrite stator, 30 …… Blower, 31 …… Related electrical equipment, E …… Expansion valve (refrigerant expansion means)

Claims (3)

[Claims] 1. An auxiliary engine, a cooling device including a refrigerant compressor, a condenser, a refrigerant expansion means, and a refrigerant evaporator, which are driven by the auxiliary engine during cooling operation, a heating device having a heat exchanger, and the cooling device during cooling. A fan that supplies cold air to the target area for air conditioning via a refrigerant evaporator and a hot air supply to the target area for air conditioning via the heat exchanger during heating, and the fan is driven to rotate by energization from a power source during heating. On the other hand, when cooling, it is equipped with a generator type electric motor that generates power by the driving force of the auxiliary engine and transmits the driving force of the auxiliary engine to the fan, and drives related electrical equipment with the electric power generated from the generator type electric motor during cooling. Auxiliary engine driven air conditioner. 2. The auxiliary engine driven air conditioner according to claim 1, wherein the generator motor has a stator made of a ferrite magnet. 3. The auxiliary engine drive according to claim 1, wherein the related electrical equipment comprises a cooling blower arranged in a state of being opposed to a super cooler provided in the cooling device. Air conditioner.