WO2007007527A1

WO2007007527A1 - Air conditioning device for vehicle

Info

Publication number: WO2007007527A1
Application number: PCT/JP2006/312583
Authority: WO
Inventors: Makoto Shibuya
Original assignee: Sanden Corporation
Priority date: 2005-07-11
Filing date: 2006-06-23
Publication date: 2007-01-18
Also published as: JP2007045389A

Abstract

An air conditioning device for a vehicle, using a hybrid compressor as the compressor in a refrigeration cycle. The hybrid compressor has a first compression mechanism and a second compression mechanism that are integrally assembled. The first compression mechanism uses a vehicle travel engine as the drive source, and the second transmission mechanism uses a built-in electric motor as the drive source. The air conditioning device has an operation control mode at which, when the engine is stopped, the compressor is operable by driving the compressor only by the electric motor. Even during a nap etc. at night, a cabin interior can be appropriately air conditioned, and in addition, the air conditioning can be made by a simple structure and simple control.

Description

Specification

Air conditioner for vehicles

Technical field

TECHNICAL FIELD [0001] The present invention relates to an air conditioner for a vehicle, and in particular, in a vehicle such as a truck, a bus, and a van, it is possible to optimally control air conditioning while the engine is stopped by stopping the engine for a nap or the like. The present invention relates to a vehicle air conditioner.

Background art

[0002] For example, a compressor for a truck air conditioner usually uses a belt-driven compressor that operates with the power of the engine. Therefore, if air conditioning is used during a nap at night, the engine It must be used over time.

[0003] On the other hand, the compressor is driven by the engine power, and when the remaining battery level is sufficient when the engine is stopped, the compressor can be driven by an auxiliary motor. Is also known (Patent Document 1). However, this air-conditioning control device is such that the compressor can be driven by an auxiliary motor that is an external motor, and the compressor is driven by either the engine or the auxiliary motor. As described in the present application, a hybrid compressor in which the first compression mechanism using the engine as the drive source and the second compression mechanism using the built-in electric motor as the drive source is not used. .

Patent Document 1: Japanese Patent No. 3180506

Disclosure of the invention

Problems to be solved by the invention

[0004] As described above, in an ordinary truck or the like, the engine must be started in order to use air conditioning while the vehicle is stopped. When the engine is started, exhaust gas is released! The environmental protection and other aspects are not desirable. In addition, engine noise may be a problem for air-conditioning operations such as taking a nap. Furthermore, if an air conditioner with a separate power source other than the engine is installed, the system becomes complicated.

[0005] In view of the current situation, an object of the present invention is to provide a vehicle air conditioner such as a truck. When using air conditioning during nighttime nap, etc., it is possible to eliminate the need to start the engine, and this air conditioning can be performed with a simple structure and simple control. It is to provide an air conditioner.

Means for solving the problem

[0006] In order to solve the above-described problem, the vehicle air conditioner according to the present invention is premised on the use of a hybrid compressor as a compressor provided in a refrigeration cycle. . That is, the vehicle air-conditioning apparatus according to the present invention is a compressor provided in the refrigeration cycle. The first compression mechanism that uses a vehicle travel engine as a drive source and the second compression that uses a built-in electric motor as a drive source. A vehicle air conditioner that uses a hybrid compressor that is integrated into the mechanism and that can operate the air conditioner by driving the compressor only by the electric motor while the engine is stopped. A control mode is provided, which is characterized by the fact that a control mode is provided.

[0007] In this vehicle air conditioner, the power source for supplying power to the electric motor can be configured as a vehicle-mounted battery. In this case, it is preferable that the engine is automatically started to charge the battery when the capacity of the battery falls below a predetermined value. When the battery is fully charged, the engine can be automatically stopped. In other words, the engine is started only when the engine is stopped and the battery needs to be recharged when performing air conditioning.

[0008] Further, the power source for supplying electric power to the electric motor may be an external commercial power source, and may have a connection means to the external commercial power source. In this case, it is preferable that a conversion device (for example, an inverter) for converting alternating current from an external commercial power source into direct current is provided in the motor drive device. When using external commercial power, there is no need to start the engine.

[0009] As the hybrid compressor of the vehicle air conditioner, for example, a compressor in which the first compression mechanism and the second compression mechanism are scroll-type compression mechanisms can be used. In this case, it is preferable to have a configuration in which the fixed scrolls of both compression mechanisms are arranged back to back. In particular, it is preferable that the scroll member is integrally formed with both fixed scrolls arranged back to back. This reduces the size of the hybrid compressor itself. The mold can be made lightweight, and the present invention can be realized without increasing the size and complexity of the entire apparatus.

[0010] Such a vehicle air conditioner according to the present invention can be applied to an apparatus for air conditioning in a cabin of a vehicle such as a truck, a bus, or a van. In these vehicles, air conditioning may be used during nighttime nap as described above, and the vehicle air conditioner according to the present invention is extremely useful.

The invention's effect

[0011] According to the vehicle air conditioner of the present invention, it is possible to appropriately perform air conditioning in the cabin without starting the engine even during nighttime nap or the like. Structure and simple control are possible. Since it is not necessary to start the engine, there is no problem of exhaust emission or engine noise.

Brief Description of Drawings

FIG. 1 is a longitudinal sectional view showing an example of a hybrid compressor used in a vehicle air conditioner according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a vehicle air conditioner according to an embodiment of the present invention.

FIG. 3 is a control flow diagram showing an example of battery control in the apparatus of FIG.

FIG. 4 is a schematic configuration diagram of a vehicle air conditioner according to another embodiment of the present invention.

Explanation of symbols

[0013] 1-node, hybrid compressor

2 First compression mechanism

3 Second compression mechanism

10, 30 Fixed scroll

11, 31 movable scroll

12, 32 Working space

13, 33 Drive shaft

15 Electromagnetic clutch

18 Suction port

20, 40 Suction chamber 21, 41 Discharge hole

22, 42 Discharge passage

35 Electric motor

36 rotor

37 Stator

38 Stator housing

39 Communication passage

43 Fixed scroll member

50 Terminal

51 Power supply external terminal

52 Wire from stator

53 Connection

54 Hollow protrusion

60 Refrigeration cycle

61 Condenser

62, 65 Fan motor

63 Expansion valve

64 Evaporator

66 Air conditioning controller

67 engine

68 Motor drive

69 battery

70 generator

80 External commercial power

81 Connection method

82 Inta

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an example of a hybrid compressor used in a vehicle air conditioner according to an embodiment of the present invention. The hybrid compressor 1 also has a scroll-type compressor power and includes a first compression mechanism 2 and a second compression mechanism 3. The first compression mechanism 2 includes a fixed scroll 10, a movable scroll 11 that meshes with the fixed scroll 10 to form a plurality of working spaces (fluid pockets) 12, and a movable scroll 11 that is engaged with the movable scroll 11 and swivels. A drive shaft 13 to be moved, an electromagnetic clutch 15 for turning on / off the drive force transmission between the drive shaft 13 and the pulley 14 to which the drive force of the engine power of the vehicle as the first drive source is transmitted, and a movable scroll A ball coupling 16 that prevents rotation of the cylinder 11 and a suction port 18 formed in the casing 17. The compressed fluid (for example, refrigerant gas) sucked into the suction chamber 20 from the suction port 18 through the suction passage 19 is taken into the working space 12, and the working space 12 is reduced in volume while the working space 12 is reduced in volume. The refrigerant gas in the working space 12 is compressed by moving toward the center. A discharge hole 21 is formed at the center of the fixed scroll 10, and the compressed refrigerant gas flows out to the high pressure side of the external refrigerant circuit via the discharge hole 21, the discharge passage 22, and the discharge port 23.

On the other hand, the second compression mechanism 3 includes a fixed scroll 30, a movable scroll 31 that meshes with the fixed scroll 30 to form a plurality of working spaces (fluid pockets) 32, and a movable scroll 31 that engages with the movable scroll 31. A drive shaft 33 for rotating 31 and a ball coupling 34 for preventing the rotation of the movable scroll 31 are provided. An electric motor 35 is built in to drive the drive shaft 33 of the second compression mechanism 3. The electric motor 35 includes a rotor 36 fixed to the drive shaft 33 and a stator 37. The stator 37 is formed on the stator housing 38 or as a part of the compressor housing. The entire electric motor 35 is housed in the stator housing 38. In the second compression mechanism 3, the fluid to be compressed (for example, refrigerant gas) sucked into the suction chamber 20 of the first compression mechanism 2 from the suction port 18 passes through the communication path 39 and the suction chamber of the second compression mechanism 3. The refrigerant 40 is sucked into 40 and taken into the working space 32, and the working space 32 is moved toward the center of the fixed scroll 30 while reducing the volume, whereby the refrigerant gas in the working space 32 is compressed. A discharge hole 41 is formed at the center of the fixed scroll 30, and the compressed refrigerant gas passes through the discharge hole 41 and the discharge passage 42 to the high pressure side of the external refrigerant circuit. Leaked.

In the present embodiment, the fixed scroll 10 of the first compression mechanism 2 and the fixed scroll 30 of the second compression mechanism 3 are disposed back to back, and both the fixed scrolls 10 and 30 are integrated. The fixed scroll member 43 is formed.

[0017] When only the first compression mechanism 2 of the hybrid compressor 1 is operated, no electric power is supplied to the electric motor 35 that drives the second compression mechanism 3, and the electric motor 35 does not rotate. Therefore, the second compression mechanism 3 does not operate. When the hybrid compressor 1 is driven only by the electric motor 35, the electric motor 35 is turned on and rotates, and the rotation of the electric motor 35 is transmitted to the drive shaft 33 of the second compression mechanism 3. As a result, the movable scroll 31 is driven to turn. At this time, the electromagnetic clutch 15 of the first compression mechanism 2 is not energized, and the rotation of the vehicle prime mover as the first drive source is not transmitted to the first compression mechanism 2. Accordingly, the first compression mechanism 2 does not operate. When both the compression mechanisms 2 and 3 are driven simultaneously, the driving force from the vehicle prime mover is transmitted to the movable scroll 11 of the first compression mechanism 2 and the electric motor 35 is turned on to generate the driving force. 2Transmitted to the movable scroll 31 of the compression mechanism 3.

[0018] The hybrid compressor 1 is provided with a terminal portion 50 of the electric motor 35. The terminal portion 50 includes a power supply external terminal 51 of the electric motor 35 and a wire 5 from the stator 37 of the electric motor 35. It has a connection part 53 with the end of 2. The connecting portion 53 is disposed in a hollow projecting portion 54 formed on the stator and bossing 38 and extending outward. The power supply external terminal 51 is a lid that can substantially seal the hollow projecting portion 54. Attached to 55.

For example, as shown in FIG. 2, such a hybrid compressor 1 is provided in a refrigeration cycle 60, and is compressed and discharged by the sucked refrigerant hybrid compressor 1. The refrigeration site 60 is provided with a condenser 61 and its fan motor 62, an expansion valve 63, an evaporator 64 and its fan motor 65. The operation of the fan motors 62 and 65 is controlled by a signal from an air conditioning controller 66 that is an air conditioning control device.

[0020] The hybrid compressor 1 as described above has a power that can be driven by the built-in electric motor 35 or Z and the engine 67. In the present embodiment, the electric motor 35 includes a motor driving device 68. Power is supplied from Notter 69 via The notter 69 is charged by a generator 70 driven by the engine 67. And in the present invention During the air conditioning while the engine 67 is stopped, if the capacity of the notch 69 falls below a predetermined value, the engine 67 is automatically started to charge the notch 69. When the battery 69 is completely charged, the engine 67 is automatically stopped. An operation control mode in which the compressor 1 is driven only by driving by the motor 35 while the engine 67 is stopped and the air conditioner can be operated is set in the air conditioning controller 66. Because of this control mode, the air conditioning controller 66 will send the necessary signals for control to the engine 67 and motor drive device 68! /.

[0021] The operation control mode is controlled based on, for example, the flow shown in FIG. In the control flow shown in FIG. 3, first, when the operation control mode in which the air conditioner can be operated by driving the compressor 1 only by driving by the built-in electric motor while the engine is stopped is selected (step S1). Then, battery control is started (step S2). Data on the battery capacity at that time (for example, battery voltage) is acquired (step S3), and it is determined whether or not the engine is stopped (step S4). When the engine is stopped, it is determined whether or not the battery voltage V is lower than the charging start voltage Va (step S5). If it is determined that the battery voltage V has decreased, the engine 67 is charged for battery charging. Is started (step S6). If it is determined that the battery voltage V is not lower than the charging start voltage Va and there is sufficient battery capacity, the battery control flow is terminated, and the battery control V is based on the selected operation control mode. The compressor 1 is driven only by the built-in electric motor 35, and the refrigeration cycle 60 is operated to perform air conditioning control.

[0022] When it is determined in step S4 that the engine is not stopped, it is determined whether or not the battery is fully charged (step S7). Is stopped (step S8). If not-charge charging has not been completed, the not-control flow is terminated and engine operation is continued until the charge amount required for this control mode is reached.

As described above, the battery charge required for executing the air conditioning control mode is ensured, and based on this control mode, the hybrid compressor 1 is basically driven only by the built-in electric motor 35 when the engine is stopped. The target air conditioning operation is performed.

[0024] Since the air conditioner operation is performed in a state where the engine 67 is stopped, the environment in which exhaust gas is not released is avoided. Therefore, the air conditioning operation is quiet and the engine noise is reduced. Therefore, it is possible to perform optimal air-conditioning operation for air-conditioning during nap. Such desirable air conditioning operation and control thereof can be realized with a simple structure and a simple control flow.

In the above embodiment, the built-in electric motor 35 is supplied with power from the battery 69, but an external commercial power supply may be used as a power supply for supplying power to the motor 35. For example, as shown in another embodiment in FIG. 4, it is possible to supply electric power from the external commercial power source 80 to the motor 35 of the hybrid compressor 1 via the connecting means 81 and the motor driving device 68. In this case, it is preferable that a conversion device (for example, an inverter 82) for converting alternating current from the external commercial power supply 80 into direct current is provided in the motor drive device 68.

[0026] With such a configuration, it is possible to supply power to the built-in electric motor 35 of the hybrid compressor 1 simply by connecting the connecting means 81 (eg, outlet-type connecting means) to the external commercial power source 80. Thus, it is possible to perform quiet air-conditioning operation without engine noise during a nap while the engine is stopped (that is, without starting the engine at all).

Industrial applicability

[0027] The vehicle air conditioner according to the present invention is used for air conditioning in a cabin of a freight vehicle such as a truck, or a vehicle such as a bus or van that requires air conditioning during a nap like a truck or the like. It is suitable for use.

Claims

The scope of the claims

[1] As a compressor provided in the refrigeration cycle, a first compression mechanism that uses a vehicle running engine as a drive source and a second compression mechanism that uses a built-in electric motor as a drive source are combined into a body. An air conditioner for a vehicle using an embedded hybrid compressor is provided with an operation control mode in which the air conditioner can be operated by driving the compressor only by driving by the electric motor while the engine is stopped. An air conditioner for a vehicle.

2. The vehicle air conditioner according to claim 1, wherein a power source for supplying electric power to the electric motor includes a vehicle-mounted battery.

3. The vehicle air conditioner according to claim 2, wherein the engine is automatically started to charge the battery when the capacity of the battery becomes equal to or less than a predetermined value.

4. The vehicle air conditioner according to claim 1, wherein a power source for supplying electric power to the electric motor is an external commercial power source, and has means for connecting to the external commercial power source.

5. The vehicle air conditioner according to claim 4, wherein a conversion device that converts alternating current from an external commercial power source into direct current is provided in the motor drive device.

6. The vehicle air conditioner according to any one of claims 1 to 5, wherein the first compression mechanism and the second compression mechanism of the hybrid compressor also serve as a scroll type compressor.

7. The vehicle air conditioner according to claim 6, wherein fixed scrolls of the first compression mechanism and the second compression mechanism are arranged back to back.

8. The vehicle air conditioner according to claim 7, comprising a scroll member in which both fixed scrolls arranged back to back are integrally formed.

[9] The device for air conditioning in the cabin of a truck, nose, or van vehicle is also provided.

The vehicle air conditioner according to any one of 1 to 8.