JP2016078717A - Vehicle sub air-conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sub air-conditioning system different from a main air-conditioning system mounted on a large truck and mountable irrespective of the type of a truck, specifically, the presence of a windshield, a high roof type or not, and the installation of a crane.SOLUTION: The vehicle sub air-conditioning system configured by mounting a home air conditioner on a truck includes an outdoor device 12, an indoor device 11, and a pair of pipes 13 for transferring a refrigerant between the outdoor device 12 and an indoor device 11. The sub air-conditioning system 11 is installed in the cab 4 of the truck 1, and the outdoor device 12 is installed in a shelf 6 fitted to the side face of the chassis 2 of the truck 1.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sub air-conditioning system mounted on a large lorry, and more particularly to a sub air-conditioning system mounted separately from a built-in main air-conditioning system in order to perform air conditioning in a cab when the engine is stopped.

  A built-in air conditioner (hereinafter abbreviated as “air conditioner”) is mounted on the cab (cab) of a large truck (hereinafter referred to as “truck”).

  On the other hand, in a large truck that travels a long distance, a space for a driver to take a nap is provided at the rear of the cab. While the driver stops the truck for a nap, the air conditioner also stops when the engine is stopped. Therefore, the engine is idling at a low speed.

  However, idling the engine to operate the air conditioner consumes about 2 to 3 liters of fuel per hour, and the stop time is 8 to 10 hours per day, increasing the running cost.

  Further, idling while the vehicle is stopped generates noise problems of the engine and environmental pollution caused by exhaust gas.

  In order to solve the above problems, the inventor has proposed a vehicular sub air conditioning system in which a home air conditioner is mounted on a truck (see Patent Document 1). If the sub-air conditioning system described in Patent Document 1 is adopted, the temperature inside the cab can be adjusted without idling the engine, so that running costs can be reduced, and noise problems and environmental pollution problems due to idling can be reduced. Can be resolved.

Japanese Patent Application Laid-Open No. 2008-81078.

  However, in the sub air conditioning system described in Patent Document 1, since the outdoor unit is installed in a windshield attached to the ceiling of the cab, it can be installed on a truck that does not have a windshield attached to the ceiling. There wasn't. For the same reason, it cannot be mounted on a high-loop type truck or a truck equipped with a crane for carrying luggage, and the types of trucks that can be used are limited.

  The present invention has been made in view of such conventional problems, and provides a vehicle sub-air conditioning system that can be mounted on a truck regardless of whether there is a windshield, whether it is a high roof type, and whether a crane is installed. The purpose is to provide.

In order to achieve the above object, a sub air conditioning system for a vehicle according to the present invention is mounted separately from a main air conditioning system incorporated in a truck, and is used between a household outdoor unit and an indoor unit, and between the outdoor unit and the indoor unit. Sub-air conditioning system for vehicles composed of a pair of pipes for transferring refrigerant at
A secondary battery for power supply;
After converting the direct current output from the sub battery to an alternating current of a predetermined voltage, an inverter that supplies the outdoor unit and the indoor unit,
Charging control means for charging the sub-battery with a DC generator output operated by rotation of an engine of the cargo passenger car,
The indoor unit is installed in a cab of the truck, and the outdoor unit is arranged in a space surrounded by a chassis and a body of the truck.

  Here, it is preferable that the outdoor unit is installed on a shelf attached to a side surface of the chassis. Moreover, it is preferable that the said secondary battery is accommodated in the box attached to the side surface of the said chassis.

  Moreover, it is preferable that the said charge control means is comprised with the relay which act | operates with the output current of the main battery which supplies electric power to the said main air conditioning system, and the backflow prevention diode connected in series with the said relay.

  A switch for operating the sub air conditioning system is installed in the cab, and when the switch is turned on while the engine of the truck is stopped, the direct current output from the sub battery is supplied to the inverter. The DC current output from the sub battery is not supplied to the inverter even if the switch is turned on while the engine of the truck is operating.

  In the vehicular auxiliary air conditioning system according to the present invention, the outdoor unit is disposed in a space surrounded by the chassis and the body, and does not need to be attached to the ceiling of the cab. It can be mounted on a truck regardless of the installation of cranes and cranes.

1 is a side view of a large truck equipped with a vehicle sub air conditioning system according to an embodiment of the present invention. It is a perspective view which shows the inside of the cab of the track | truck of FIG. It is a principal part side view which shows the state which turned the cab of the track | truck of FIG. It is a figure explaining the operation | movement of the sub-air-conditioning system for vehicles concerning an embodiment (the 1). It is a figure explaining the operation | movement of the sub-air-conditioning system for vehicles concerning an embodiment (the 2).

  Hereinafter, an auxiliary air conditioning system for a vehicle according to an embodiment of the present invention will be described with reference to the drawings.

<Configuration of truck equipped with sub-air conditioning system for vehicles>
FIG. 1 is a side view of a large truck equipped with a vehicle sub air conditioning system according to an embodiment, and FIG. 2 is a perspective view showing the inside of the cab of the truck.

  In the truck 1, a cab 4 on which a person such as a driver rides is attached to a front part of a chassis 2 to which a plurality of wheels 3 are attached, and a body 5 for loading luggage is attached to the upper part of the chassis 2.

  In the present embodiment, a general home air conditioner of an inverter type using 100 volt AC as a driving power source is used as the sub air conditioning system. The sub air conditioning system includes an indoor unit 11 in which a heat exchanger is built, and an outdoor unit 12 in which a compressor and a heat exchanger are built, and a pair of refrigerant that transfers a refrigerant between the indoor unit 11 and the outdoor unit 12. They are connected by a pipe 13.

  In the sub air conditioning system, the indoor unit 11 is attached to the rear wall of the cab 4 as shown in FIG. 2 so that cold air or hot air from a heat exchanger (not shown) fills the cab 4. Sent out.

  On the other hand, the outdoor unit 12 with a built-in compressor is disposed in a space surrounded by the chassis 2 and the body 5. Specifically, the cross section is installed on a shelf 6 attached to the side surface of the rectangular parallelepiped chassis 2. The shelf 6 employs a structure that does not hinder the inflow of air to the outdoor unit 12 and the outflow of air from the outdoor unit 12. Further, a side guard 7 for preventing entrainment is attached to the outside of the shelf 6 while being suspended from the body 5.

  As shown in FIG. 2, the refrigerant transfer pipe 13 connected to the indoor unit 11 is accommodated in the wall of the cab 13 together with the drain pipe 14, and is bent at the lower part of the cab 4 as shown in FIG. 1. It is connected to the outdoor unit 12 through a gap between the body 5 and the chassis 2.

  As shown in FIG. 1, a rectangular parallelepiped box 8 attached to the rear side surface of the chassis 2 includes a secondary battery 21 that supplies power to the secondary air conditioning system, and a direct current output from the secondary battery 21 as an alternating current. An inverter 15 for converting to is accommodated. A lid that can be opened and closed is attached to the side of the box 8 and is usually closed for waterproofing.

  As described above, in the conventional sub air conditioning system, the outdoor unit 12 is installed on the ceiling of the cab 4, and thus cannot be mounted on a truck in which the windshield is not installed on the ceiling of the cab 4. For the same reason, it could not be mounted on high roof type trucks or trucks with cranes.

  On the other hand, in the sub air conditioning system according to the present embodiment, since the outdoor unit 12 is installed on the shelf 6 attached to the side surface of the chassis 2, the presence or absence of a windshield, whether it is a high roof type, and the crane Can be installed regardless of installation.

  Further, when the outdoor unit 12 is installed on the ceiling of the cab 4 as in the conventional sub air conditioning system, the vibration generated from the compressor is transmitted into the cab 4 and causes vibration and noise. In the sub air conditioning system, the outdoor unit 12 is installed on the shelf 6 attached to the side surface of the chassis 2 and is away from the cab 4, so that vibration and noise are not generated in the cab 4.

  In FIG. 1, the outdoor unit 12 is installed on the shelf 6 attached between the wheel bases of the chassis 2, but the attachment position of the shelf is not limited between the wheel bases. If there is enough space, the rear side surface of the chassis 2 may be provided at a position adjacent to the box 8 in which the secondary battery 21 is stored.

  Next, the pipe 13 for transferring the refrigerant will be described. In a general air-conditioning system for home use, a refrigerant is transferred using a copper pipe. However, when this is adopted in a sub-air-conditioning system for a truck, there is a disadvantage. As shown in FIG. 3, the cab 4 is configured to be able to turn around a lower front portion that is a connecting portion with the chassis 2 for maintenance and inspection.

  The pipe 13 is also bent in the vicinity of the turning shaft so that it can cope with the turning operation of the cab 4. If a copper pipe is used in such a place, the pipe 13 is deformed and damaged in accordance with the turning operation. Therefore, in this embodiment, a flexible high-pressure gas hose is provided at a location where the angle of the pipe 13 changes. Used.

<Configuration and operation of auxiliary air conditioning system for vehicles>
Next, with reference to FIGS. 4 and 5, the configuration and operation of the vehicular auxiliary air conditioning system according to the present embodiment will be described. 4 and 5 show members constituting the sub air conditioning system. FIG. 4 is a diagram for explaining the control while the engine is in operation. FIG. 5 is a diagram showing the engine is stopped and the sub air conditioning system is in operation. It is a figure explaining the control in. In the figure, the arrow indicates the direction of current flow.

  Among the members shown in FIG. 4, the main battery 22, the ignition switch 23, and the dynamo 24 are preinstalled on the track 1, and are usually used to realize the original functions of the track 1.

  In contrast, the inverter 15, the air conditioner 16, the sub battery 21, the relays 25 to 27, the diode 28, and the switch 29 are newly installed to operate the sub air conditioning system.

  The inverter 15 converts the 24 volt direct current (DC24V) supplied from the sub-battery 21 into a 100 volt alternating current (AV100V) and then supplies it to the air conditioner 16. In this embodiment, an inverter having a capacity of 1500 W and a maximum instantaneous capacity of 3000 W is used.

  In addition, although the air conditioner which employ | adopted the inverter system is spreading as a household air conditioner, the inverter used with this air conditioner controls the rotation speed of a compressor, and is the inverter 15 of this Embodiment The functions are different.

  The air conditioner 16 indicates the above-described indoor unit 11, outdoor unit 12, and pipe 13. For temperature control of the air conditioner 16, a remote controller (hereinafter abbreviated as "remote controller") provided in a home air conditioner is used. The user can freely control the temperature of the air blown from the indoor unit 11 using a remote controller (not shown).

  In the present embodiment, as the secondary battery 21, for example, a plurality of 24 volt, 520 Ah lead storage batteries connected in parallel is used. The configuration of the sub battery 21 is appropriately set according to the power consumption of the sub air conditioning system.

  For example, when an inverter-type 1200-watt air conditioner for home use (for 4.5 to 6 tatami mats) is used as a sub air-conditioning system for vehicles, the interior of the cab 4 is very small compared to the volume of a home room. Therefore, it can be operated with extremely low power consumption. Therefore, operation for about 30 hours is possible using the secondary battery 21.

  An ignition switch 23 is used to start the engine, and the connection state is switched by inserting a key into the switch and turning it. In the figure, ACC indicates a state where a current flows through an accessory such as a radio, IG indicates a state where a current flows through the ignition device, and ST indicates a state where the starter motor rotates the crankshaft and starts the engine.

  The dynamo 24 is a generator that is rotationally driven by the rotation of the engine, and generates a direct current (DC24V) of 24 volts. The current generated by the dynamo 24 is supplied to the main battery 22 and charged.

  The relay 25 connects the ignition switch 23 and the switch 29 for operating the sub air conditioning system installed in the cab 4, the relay 26 connects the main battery 22 and the backflow prevention diode 28, relay 27 connects the sub battery 21 and the inverter 15.

  The diode 28 is a diode for preventing backflow, and the diode 28 prevents the direct current output from the secondary battery 21 from flowing into various electrical components (not shown) mounted on the track. The relay 26 and the diode 28 constitute a charging control unit for the sub battery 21.

  The pilot lamp 30 is used to display the operating state of the switch 29, and the fuses 31 and 32 are used to prevent overcurrent.

  Next, control of the sub air conditioning system when the engine is operating will be described with reference to FIG. After the user inserts a key into the ignition switch 23 and starts the engine, when the ignition switch 23 is set to the position indicated by IG, the engine rotates and the vehicle can run.

  In this state, a direct current of 24 volts (DC 24 V) from the main battery 22 is supplied to the relay 25 via the ignition switch 23, and the contact of the relay 25 is held open. For this reason, even if the user turns on the operation switch 29 of the sub air conditioning system installed in the cab 4, the air conditioner 16 does not operate.

  In addition, when the ignition switch 23 is in the IG state, the relay 26 operates to connect the dynamo 24 and the backflow prevention diode 28, so that the direct current generated by the dynamo 24 is not only transmitted to the main battery 22 but also to the sub-battery 21. Is also supplied and charged.

  As described above, when the ignition switch 23 is in the IG state, the engine can rotate and run. However, since the contact of the relay 25 is off, the current from the main battery 22 is switched to the switch 29. Not supplied. Therefore, even if the switch 29 is turned on in such a state, the relay 27 does not operate, so the current from the sub battery 21 is not supplied to the inverter 14 and the air conditioner 16 does not operate.

  When the truck is running or the engine is operating, the main air conditioning system mounted on the truck 1 from the beginning is operated to cool and heat the cab 4. Although not shown, the main air-conditioning system includes a compressor driven by the rotation of the engine, an evaporator that expands and vaporizes the refrigerant compressed by the compressor and generates cool air, a controller that controls the operation of the evaporator, and the like.

  Next, control when the ignition switch 23 is turned off and the sub air conditioning system is operated will be described with reference to FIG.

  When the engine is stopped by turning off the ignition switch 23, the current from the main battery 22 is not supplied to the relays 25 and 26, the contact of the relay 26 is opened, and conversely, the contact of the relay 25 is closed. A current from the main battery 22 is supplied to the switch 29. When the switch 29 is turned on in this state, the relay 27 is activated and the contact is closed, the current from the sub battery 21 is supplied to the inverter 15, and the air conditioner 16 becomes operable.

  In this state, when the user turns on the power supply of the air conditioner 16 using a remote controller (not shown) and sets the cooling operation, for example, the outdoor unit 12 and the indoor unit 11 (see FIG. 1) start operation, and the cab 4 Cool inside.

  As described above, in the sub-air conditioning system for a vehicle according to the present embodiment, the cab is operated by operating the air conditioner 16 as necessary even when the engine is stopped while the truck is stopped. Air conditioning in 4 can be performed. Accordingly, since it is not necessary to operate the truck engine while the vehicle is stopped, problems such as noise, waste heat, fuel consumption, and exhaust gas can be improved.

  In the sub air conditioning system according to the present embodiment, the outdoor unit 12 including the compressor is disposed in a space surrounded by the chassis 2 and the body 5, and the outdoor unit 12 is installed on the ceiling of the cab 4. Since it is not necessary, it can be installed regardless of whether there is a windshield, whether it is a high roof type, and crane installation, and the range of applicable trucks is expanded.

  In the above-described embodiment, the outdoor unit 12 is installed on the shelf 6 attached to the side surface of the chassis 2, but the installation method of the outdoor unit is not limited to this. For example, a shelf may be suspended from the lower portion of the truck body 5 and an outdoor unit may be installed on the shelf.

  Further, in this embodiment, the case where the inverter type home air conditioner is adopted as the sub air conditioning system has been described. However, the present invention is not limited to the inverter type air conditioner, and other types of air conditioners may be used. Needless to say.

DESCRIPTION OF SYMBOLS 1 Truck 2, Chassis 3, Tire 4 Cab 5, Body 6 Shelf 7 Side guard 8 Box 11 Indoor unit 12 Outdoor unit 13 Pipe 14 Drain pipe 15 Inverter 16 Air conditioner 21 Sub battery 22 Main battery 23 Ignition switch 24 Dynamo 25, 26 27 Relay 28 Diode 29 Switch 30 Pilot lamp 31, 32 Fuse

Claims (5)

Sub-air-conditioning system for vehicles, which is installed separately from the main air-conditioning system incorporated in a truck, and is composed of a household outdoor unit and an indoor unit, and a pair of pipes that transfer refrigerant between the outdoor unit and the indoor unit. Because
A secondary battery for power supply;
After converting the direct current output from the sub battery to an alternating current of a predetermined voltage, an inverter that supplies the outdoor unit and the indoor unit,
Charging control means for charging the sub-battery with an output of a direct current generator that operates by rotation of an engine of the cargo passenger car,
The vehicle sub-air conditioning system, wherein the indoor unit is installed in a cab of the truck, and the outdoor unit is disposed in a space surrounded by a chassis and a body of the truck.   The vehicular auxiliary air conditioning system according to claim 1, wherein the outdoor unit is installed on a shelf attached to a side surface of the chassis.   The vehicular sub-air conditioning system according to claim 1 or 2, wherein the sub-battery is housed in a box attached to a side surface of the chassis.   4. The charging control unit according to claim 1, wherein the charging control means includes a relay that operates by an output current of a main battery that supplies power to the main air conditioning system, and a backflow prevention diode connected in series with the relay. A secondary air conditioning system for a vehicle according to claim 1. In the cab, a switch for operating the sub air conditioning system is installed,
When the switch is turned on while the lorry engine is stopped, the direct current output from the sub-battery is supplied to the inverter, and even if the switch is turned on while the lorry engine is operating, The vehicular auxiliary air conditioning system according to any one of claims 1 to 4, wherein a direct current output from the auxiliary battery is not supplied to the inverter.

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