JP2004125375A - On-vehicle refrigeration device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle refrigeration device capable of continuing in-vehicle cooling by selecting a power supply method according to the case of a short-time stop of an engine and the case of a long-time stop. <P>SOLUTION: In this refrigeration device, a motor battery 18 for driving an electric motor 5 is provided, and an electric controller 17 drives the electric motor 5 by the motor battery 18 to make a motor drive compressor 6 operate a refrigeration cycle when the engine 3 stops with power supply from a ground power source absent. Thereby, even if the power supply from the ground power source is absent in the case of the sort-time stop of the engine 3, the power is supplied from the motor battery 18 to continue the in-vehicle cooling. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle-mounted refrigeration device driven by one of a vehicle engine and a motor driven by a ground power source, or a vehicle-mounted refrigeration device driven by one of a vehicle engine and a motor driven by a vehicle-mounted battery.
[0002]
[Prior art]
As a prior art, as shown in Patent Document 1, there is a vehicle-mounted refrigeration apparatus in which a motor-driven compressor is connected in parallel with an engine-driven compressor. During traveling, the vehicle engine drives the engine driven compressor to drive the refrigeration system.For example, when arriving at a delivery base etc. and stopping the engine until dawn, connect the electric control device of the motor to the ground power supply. A motor-driven compressor is operated by an electric motor to cool the inside of the vehicle.
[0003]
Another conventional technique is an in-vehicle refrigeration system that switches and connects to one compressor by an engine or a motor via an electromagnetic clutch. During running, the compressor is operated by the vehicle engine to drive the refrigeration system.For example, the engine is stopped while arriving at the destination etc. and loading / unloading the luggage, and the preceding compressor is operated by the electric motor by the vehicle-mounted battery. , To cool the interior of the car.
[0004]
[Patent Document 1]
JP-A-48-56721 [0005]
[Problems to be solved by the invention]
However, in the above-mentioned conventional in-vehicle refrigeration apparatus, in which two compressors having different driving sources are provided and switched, when a ground power source cannot be obtained at a destination during delivery or the like, a motor-driven compressor cannot be operated. When the engine is stopped, there is a problem that the inside of the vehicle cannot be cooled.
[0006]
In the case where the drive source is switched by a single compressor, which will be described later, the engine is stopped for a short period of time when the vehicle arrives at a destination or the like and loads are unloaded. For example, when arriving at a delivery base or the like and stopping the engine until dawn, the on-board battery is limited and cooling inside the car cannot be continued for a long time, and cooling during the next delivery There is a problem that charging must be performed in order to perform the operation.
[0007]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the related art, and a first object is to select an electric power supply method depending on whether the engine is stopped for a short time or for a long time, and thereby to reduce the number of power supply in the vehicle. A second object of the present invention is to provide an in-vehicle refrigeration apparatus capable of charging a battery so that cooling can be continued and that the inside of the vehicle can be cooled during the next delivery while the vehicle is parked.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the technical means described in claims 1 to 5 is adopted. That is, according to the first aspect of the invention, an engine drive compressor (4) driven by a vehicle engine (3) to pump refrigerant and a motor driven compressor (6) driven by an electric motor (5) to pump refrigerant. ) Are connected in parallel, the compressors (4, 6), a condenser (7) for radiating the heat of the refrigerant, a decompression means (8) for decompressing and expanding the refrigerant, and a refrigerant for evaporating the refrigerant for cooling. A refrigerating cycle in which an evaporator (9) is connected in a ring shape. When the engine (3) is operating, the refrigerating cycle is operated by the engine-driven compressor (4), and when the engine (3) is stopped, electricity is generated. The control means (17) is connected to a ground power source to receive power supply, thereby driving the electric motor (5) and obtaining a refrigeration cycle by the motor drive compressor (6). The in-vehicle refrigeration system to be,
A motor battery (18) for driving the electric motor (5) is provided,
The electric control means (17) drives the electric motor (5) with the motor battery (18) when the engine (3) is stopped in a state where there is no power supply from the ground power supply, and controls the motor drive compressor (6). It is characterized by operating a refrigeration cycle.
[0009]
Thus, even when the engine (3) is stopped for a short time, even if there is no power supply from the ground power supply, cooling in the vehicle can be continued by supplying power from the motor battery (18).
[0010]
According to the second aspect of the present invention, the hybrid compressor (20) that drives one of the vehicle engine (3) and the electric motor (5) to pump the refrigerant and the condenser (7) that radiates heat of the refrigerant are provided. A refrigeration cycle in which a decompression means (8) for decompressing and expanding the refrigerant and an evaporator (9) for evaporating and cooling the refrigerant are connected in a ring shape. When the engine (3) is running, the engine (3) Drives the hybrid compressor (20) to operate the refrigeration cycle. When the engine (3) is stopped, power is supplied from the vehicle-mounted battery (18) via the electric control means (17), and the electric motor (5) is turned on. ) Drives the hybrid compressor (20) to operate the refrigeration cycle.
The electric control means (17) connects the ground compressor to the ground power source while the engine (3) is stopped, and receives electric power. It is characterized by being driven to operate a refrigeration cycle.
[0011]
Thus, even when the engine (3) has been stopped for a long time, cooling in the vehicle can be continued by supplying power from the ground power supply.
[0012]
According to the third aspect of the present invention, the electric control means (17) is provided with a charging function of charging the battery (18) by power supply from the ground power supply, and the electric control means (17) stops the engine (3). In this state, the refrigeration cycle is operated by driving the motor-driven compressor (6) or the hybrid compressor (20) with the electric motor (5) by the power supply from the ground power supply by connecting to the ground power supply and receiving power. And the battery (18) is charged by power supply from a ground power supply.
[0013]
Thus, the battery (18) is charged so that the interior of the vehicle can be cooled during the next delivery in parallel with the interior of the vehicle while the vehicle is parked.
[0014]
According to the fourth aspect of the present invention, the electric control means (17) charges the battery (18) when power is supplied from a ground power source in a state where the engine (3) and the refrigeration cycle are stopped. Features. As a result, by connecting to the ground power source while the vehicle is parked, the battery (18) is charged so that the inside of the vehicle can be cooled during the next delivery.
[0015]
According to a fifth aspect of the present invention, a variable displacement compressor is used as the hybrid compressor (20). Thus, the compression capacity can be varied between when the vehicle is driven by the vehicle engine (3) and when the vehicle is driven by the electric motor (5), and the load can be adjusted to a load corresponding to the torque of the drive source. Incidentally, the reference numerals in the parentheses of the above-described units are examples showing the correspondence with specific units described in the embodiments described later.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
(1st Embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing the arrangement of the on-board refrigeration apparatus according to the first embodiment of the present invention, and FIG. 2 is a piping and wiring diagram of the on-board refrigeration apparatus in the embodiment of FIG. This embodiment is applied to a truck-type refrigerating vehicle as a vehicle-mounted refrigerating device.
[0017]
1 is an operating cabin, 2 is a freezing room, 3 is a vehicle engine, 4 is an engine driven compressor that is driven by the engine 3 to pump refrigerant, and both the engine 3 and the engine driven compressor 4 are installed in the engine room. ing. Reference numeral 6 denotes a motor-driven compressor driven by the electric motor 5 to pump the refrigerant, and is connected in parallel with the engine-driven compressor 4 in the refrigeration cycle. The electric motor 5 and the motor drive compressor 6 are both installed on the freezer compartment 2 side.
[0018]
Reference numeral 7 denotes a condenser that radiates heat of the refrigerant, and is installed on the cabin 1. Reference numeral 8 denotes an expansion valve as a decompression means for decompressing and expanding the refrigerant. Reference numeral 9 denotes an evaporator that evaporates the refrigerant to cool the air, and is installed above the freezing compartment 2. Incidentally, reference numerals 7a and 9a denote blower fans for blowing air to the condenser 7 and the evaporator 9, respectively. The compressors 4 and 6, the condenser 7, the expansion valve 8, and the evaporator 9 are connected in a ring shape as shown in FIG. 2 to form a known refrigeration cycle.
[0019]
Reference numeral 11 denotes a check valve provided on the discharge side refrigerant passage 10 of the engine drive compressor 4, and reference numeral 13 denotes a check valve provided on the discharge side refrigerant passage 12 of the motor drive compressor 6. The refrigerant extruded from any one of the compressors 4 and 6 passes through the condenser 7, and the refrigerant cooled by the condenser 7 is depressurized by the expansion valve 8 and absorbed by the evaporator 9, and then the return pipe 14 is connected to the branch pipes 15 and 16. , Respectively, leads to the suction ports of the compressors 4 and 6.
[0020]
Reference numeral 17 denotes an electric control device as electric control means, which has an AC-DC function of converting supplied AC to DC when connected to a ground power supply. Further, as a feature of the present embodiment, a battery 18 for driving the electric motor 5 is provided and connected to the electric control device 17, and the electric control device 17 is charged with power from a ground power supply. It has a charging function to perform.
[0021]
In response to a signal from an air conditioning control device (not shown), the electric motor 5 is driven by power supply from the ground power supply, the electric motor 5 is driven by power supply from the battery 18, or the battery 18 is charged by power supply from the ground power supply. The dripping operation is performed by switching.
[0022]
As a result, when the engine 3 is operating, the refrigeration cycle is operated by the engine drive compressor 4, and when the engine 3 is stopped, the electric control device 17 is connected to the ground power source to receive power, so that the electric motor 5 To operate the refrigeration cycle by the motor-driven compressor 6.
[0023]
Further, by providing the motor battery 18 for driving the electric motor 5, the electric control device 17 uses the motor battery 18 when the engine 3 is stopped when there is no power supply from the ground power supply. 5 is driven to operate the refrigeration cycle by the motor-driven compressor 6. Accordingly, even when the engine 3 is stopped for a short time and the power is not supplied from the ground power source, the power is supplied from the motor battery 18 so that the cooling in the vehicle can be continued.
[0024]
Further, by providing the electric control device 17 with a charging function of charging the battery 18 by supplying power from the ground power supply, the electric control device 17 connects to the ground power supply while the engine 3 is stopped to supply power. Upon receiving the power, the electric motor 5 drives the motor-driven compressor 6 by the power supply from the ground power supply to operate the refrigeration cycle, and the battery 18 is charged by the power supply from the ground power supply. Thereby, the battery 18 is charged so that the interior of the vehicle can be cooled during the next delivery in parallel with the interior cooling while the vehicle is parked.
[0025]
Further, the electric control device 17 charges the battery 18 when power is supplied from the ground power supply in a state where the engine 3 and the refrigeration cycle are stopped. By connecting to the ground power source while the vehicle is parked, the battery 18 is charged so that the inside of the vehicle can be cooled during the next delivery.
[0026]
(2nd Embodiment)
FIG. 3 is a plan view showing an arrangement of the on-board refrigeration apparatus according to the second embodiment of the present invention, and FIG. 4 is a piping and wiring diagram of the on-board refrigeration apparatus in the embodiment of FIG. The difference from the first embodiment is that a hybrid compressor 20 that drives one of the vehicle engine 3 and the electric motor 5 to pump the refrigerant is used. Numeral 19 shown in FIG. 3 is an electromagnetic clutch for switching between driving by the engine 3 and driving by the electric motor 5 for the hybrid compressor 20.
[0027]
Therefore, when the engine 3 is operating, the hybrid compressor 20 is driven by the engine 3 to operate the refrigeration cycle, and when the engine 3 is stopped, power is received from the vehicle-mounted battery 18 via the electric control device 17, The electric motor 5 drives the hybrid compressor 20 to operate the refrigeration cycle.
[0028]
In addition, the electric control device 17 drives the hybrid compressor 20 with the electric motor 5 by the power supply from the ground power supply by connecting the power supply from the ground power supply while the engine 3 is stopped, thereby performing the refrigeration cycle. It can also be activated. Thus, even when the engine 3 is stopped for a long time, the interior of the vehicle can be continued by supplying power from the ground power supply.
[0029]
Further, similarly to the first embodiment, the electric control device 17 has a charging function of charging the battery 18 by supplying power from the ground power supply, and the electric control device 17 operates in a state where the engine 3 is stopped. By connecting to a power supply and receiving power supply, the hybrid compressor 20 is driven by the electric motor 5 by power supply from the ground power supply to operate the refrigeration cycle, and the battery 18 is charged by power supply from the ground power supply. It has become. Thereby, the battery 18 is charged so that the interior of the vehicle can be cooled during the next delivery in parallel with the interior cooling while the vehicle is parked.
[0030]
Further, the electric control device 17 charges the battery 18 when power is supplied from the ground power supply with the engine 3 and the refrigeration cycle stopped. By connecting to the ground power source while the vehicle is parked, the battery 18 is charged so that the inside of the vehicle can be cooled during the next delivery.
[0031]
The hybrid compressor 20 is of a variable displacement type. Thus, the compression capacity can be varied between when the vehicle is driven by the vehicle engine 3 and when the vehicle is driven by the electric motor 5, and can be adjusted to a load corresponding to the torque of the drive source. The hybrid compressor 20 may have a structure having a one-way clutch or the like and not requiring the electromagnetic clutch 19.
[Brief description of the drawings]
FIG. 1 is a plan view showing an arrangement of a vehicle-mounted refrigeration apparatus according to a first embodiment of the present invention.
FIG. 2 is a piping and wiring diagram of the on-vehicle refrigeration apparatus in the embodiment of FIG.
FIG. 3 is a plan view illustrating an arrangement of a vehicle-mounted refrigeration apparatus according to a second embodiment of the present invention.
FIG. 4 is a piping and wiring diagram of the on-vehicle refrigeration apparatus in the embodiment of FIG. 3;
[Explanation of symbols]
3 vehicle engine 4 engine drive compressor 5 electric motor 6 motor drive compressor 7 condenser 8 expansion valve (decompression means)
9 Evaporator 17 Electric control device (electric control means)
18 Battery for motor, on-board battery 20 Hybrid compressor

Claims (5)

An engine driven compressor (4) driven by a vehicle engine (3) to pump refrigerant and a motor driven compressor (6) driven by an electric motor (5) to pump the refrigerant are connected in parallel. Both compressors (4, 6), a condenser (7) for radiating heat of the refrigerant, a decompression means (8) for decompressing and expanding the refrigerant, and an evaporator (9) for evaporating and cooling the refrigerant. Equipped with a refrigeration cycle connected in a ring,
When the engine (3) is operating, the refrigeration cycle is operated by the engine-driven compressor (4). When the engine (3) is stopped, the electric control means (17) is connected to a ground power supply. An in-vehicle refrigeration apparatus that receives power supply, drives the electric motor (5), and operates the refrigeration cycle by the motor-driven compressor (6).
A motor battery (18) for driving the electric motor (5);
The electric control means (17) drives the electric motor (5) with the motor battery (18) when the engine (3) is stopped in a state where power is not supplied from the ground power supply, and An in-vehicle refrigeration system, wherein the refrigeration cycle is operated by a driving compressor (6). A hybrid compressor (20) that drives one of the vehicle engine (3) and the electric motor (5) to pump the refrigerant, a condenser (7) that radiates heat of the refrigerant, and a decompression that decompresses and expands the refrigerant. A refrigeration cycle in which means (8) and an evaporator (9) for evaporating and cooling the refrigerant are connected in a ring shape;
When the engine (3) is running, the engine (3) drives the hybrid compressor (20) to operate the refrigeration cycle. When the engine (3) is stopped, the on-board battery (18) ) Via the electric control means (17), and the electric motor (5) drives the hybrid compressor (20) to operate the refrigeration cycle. 17) connecting the electric compressor (20) with the electric motor (5) by the power supply from the ground power supply by connecting the power supply from the ground power supply while the engine (3) is stopped. An in-vehicle refrigeration apparatus that is driven to operate the refrigeration cycle. The electric control means (17) is provided with a charging function for charging the battery (18) by power supply from the ground power supply, and the electric control means (17) operates in a state where the engine (3) is stopped. The electric motor (5) drives the motor-driven compressor (6) or the hybrid compressor (20) with the electric power supplied from the ground power supply to connect the refrigeration cycle to the refrigeration cycle. The on-board refrigeration apparatus according to claim 1 or 2, wherein the battery (18) is charged while being operated and supplied with power from the ground power supply. The electric control means (17) charges the battery (18) when power is supplied from the ground power source with the engine (3) and the refrigeration cycle stopped. An in-vehicle refrigeration apparatus according to any one of claims 1 to 3. The in-vehicle refrigeration system according to claim 2 or 3, wherein a variable displacement compressor is used as the hybrid compressor (20).

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