JP4695222B1 - Automotive cooling / heating air conditioning system - Google Patents

Abstract

A conventional car air conditioner cannot be used unless the engine is running even when the vehicle is stopped. Hybrid vehicles and electric vehicles also have two systems of air conditioning, a cooling air-conditioning system using an electric compressor powered by a battery and a heating air-conditioning system using an electric heater, and their use is restricted due to a voltage drop due to the use of electrical equipment. In addition, trucks and taxis with long standby times have consumed expensive fuel when they are stopped, reducing the life of the engine and deteriorating the global environment through CO2 emissions.
In order to solve the above-mentioned problems, a conventional two-system air-conditioning configuration is provided with a hermetic electric compressor using electricity as a power source, and cooling is performed by switching the refrigerant flow directions through a switching valve.・ Use the same system for heating. This eliminates the existing heating and air conditioning system. The system can be used with in-vehicle power supplies and multiple external power supplies, regardless of when driving or when the engine is stopped.
[Selection] Figure 1

Description

The present invention relates to an automobile cooling / heating air conditioning system that performs cooling / heating of an automobile when traveling and when an engine is stopped.

As shown in FIG. 3, a conventional car air conditioner uses an engine as a power source, a cooling air conditioner that drives a compressor and exchanges heat of compression of the refrigerant, and the engine as a power source. The cooling water of the radiator is supplied by a water pump. It circulates and heats and cools with two systems of heating and air conditioning that exchange heat. Therefore, driving the engine is indispensable and unavoidable.

In recent years, some hybrid vehicles and electric vehicles perform cooling air conditioning using an electric compressor and heating air conditioning with hot water circulation using an electric heater, as shown in FIG. Thus, the conventional vehicle-mounted compressor has only a cooling function and does not have a heating function.

Japanese Patent No. 3322053 36-27032

However, the above-described conventional car air conditioner cannot be used unless the engine is turned on not only when driving but also when stopping at a traffic light or when parking for a long time. The hybrid vehicle can be air-conditioned by stopping the engine for a short time, but the engine must be restarted due to a voltage drop. Even in an electric vehicle, there is a restriction on the travel distance, and the use time is extremely limited depending on the use frequency and road conditions.

In terms of the environment, it goes without saying that global warming due to CO2 emissions in accordance with the Kyoto Protocol, destruction of the ozone layer, and air pollution. Accordingly, the present invention provides a cooling / heating / air conditioning system for automobiles, which is not available in conventional car air conditioners, and can provide cooling / heating / heating / air-conditioning with a vehicle-mounted power source and a plurality of power sources when the vehicle is running and when the engine is stopped. Let it be an issue.

In order to solve the above problems, a cooling / heating / air-conditioning system for an automobile according to the present invention is charged with a direct current output from an on-vehicle generator during traveling, and a main battery serving as a power source for a fan motor that drives the fan, A sub-battery that is supplied with a direct current output from an in-vehicle generator when the main battery is charged by a predetermined amount, and an alternating current obtained by converting the direct current of the sub-battery into alternating current through a direct-current alternating current conversion means an electric compressor driven, and the electric compressor is connected via a switching valve to be condenser and evaporator heat exchange is performed, and an external power source for supplying power for driving the electric compressor when the engine is stopped, the external power source AC / DC conversion means that converts the AC current into DC current, and power that switches between the on-vehicle power supply and the external power supply And switching means, comprising at least a switching means for switching the cooling and heating and the flow of the refrigerant in the single system a cooling and heating air conditioning system of a motor vehicle capable of performing cooling and heating, when a predetermined amount charged to the main battery that The voltage sensor for detecting a predetermined amount detects a drop in the voltage of the main battery, and the relay-integrated connection means provided with the voltage sensor is a relay connection switch for supplying surplus current of the main battery to the sub battery. And a battery connection switch for connecting the sub battery in parallel with the main battery when the power of the main battery is insufficient .

The vehicle cooling / heating air conditioning system of the present invention is charged with a direct current output from an on-vehicle generator during traveling, and a main battery serving as a power source of a fan motor that drives the fan, and a predetermined amount of the main battery is charged. And a sub-battery supplied with a direct current output from the on-vehicle generator, an electric compressor driven by an alternating current obtained by converting the direct current of the sub-battery into a direct current through a direct current alternating current conversion means, and the electric motor converting compressor is connected via a switching valve and condenser and evaporator heat exchange is performed, and an external power source for supplying power for driving the electric compressor when the engine is stopped, an alternating current of the external power supply into a direct current AC / DC conversion means, power source switching means for switching between in-vehicle power source and external power source, cooling and heating Ri least a switching means for changing the flow of the refrigerant in the single system a cooling and heating air conditioning system of a motor vehicle capable of performing cooling and heating, when a predetermined amount charged to the main battery voltage sensor for detecting the predetermined amount In addition, the voltage drop of the main battery is also detected, and the relay-integrated connection means provided with the voltage sensor has a relay connection switch for supplying the main battery surplus current to the sub battery, and the power of the main battery is insufficient. It is characterized by having at least a battery connection switch that connects the sub battery to the main battery in parallel , so that it can be used with in-vehicle power supply and multiple external power supplies, so that it can be used during driving and when stopping Can also get cooling and heating. In addition, by providing an electric compressor and exchanging heat between the condenser and the evaporator via the switching valve and performing cooling and heating in the same system, the conventional heating system becomes unnecessary, and the air conditioner is simplified. In addition, since the motor is driven by silent vibration, it can provide an environment-friendly automotive air conditioning system that emits no CO2 and is environmentally friendly. Further, when the voltage sensor in the relay-integrated connection device detects that the main battery is fully charged, the surplus current of the main battery is charged to the connected sub-battery by the relay connection switch in the relay-integrated connection device. When the voltage of the main battery drops due to the start and use of electrical equipment of the vehicle, the voltage sensor detects this, cuts off the relay connection switch, and starts charging only the main battery again. Further, even when the main battery is used excessively, there is an effect that the main battery and the sub battery are connected in parallel by the battery connection switch and the engine can be started.

1 is a block diagram of an automobile cooling / heating air conditioning system according to an embodiment of the present invention (on-vehicle power supply). “Automobile cooling / heating air conditioning system” configuration diagram showing an embodiment of the present invention (external power source 1) System configuration diagram of car air conditioner showing conventional technology System configuration diagram of car air conditioner showing conventional technology (electric vehicle)

One embodiment of the present invention is shown in FIG.
The configuration of the air conditioning system during traveling will be described with reference to FIG. The battery voltage of an automobile is usually 12V and 24V, but in the text, it will be described as 24V for a large truck or the like. FIG. 5 is a configuration diagram when “on-vehicle power source” is selected by the power source switch 16. Further, the refrigerant system diagram when the heating is selected by the refrigerant selector switch 17 and the four-way selector valve 24 is operated is indicated by a dotted line.

The engine 1 which is a power source of the vehicle and the on-vehicle generator 3 are connected by the belt 2, and the DC output (DC24V) is charged to the main battery 4. At this time, when the voltage sensor 5 in the relay-integrated connection device 8 detects that the main battery 4 is fully charged (about 26 V), the surplus current of the main battery 4 is replaced with the relay connection switch in the relay-integrated connection device 8. 6 starts charging the connected sub-battery 9. When the voltage of the main battery 4 drops (about 23V) due to the use of the electrical equipment of the vehicle, this is detected by the voltage sensor 5, the relay connection switch 6 is cut off, and only the main battery 4 starts to be charged again. When the voltage of the main battery 4 decreases, the main battery 4 and the sub battery 9 are connected in parallel by the battery connection switch 7 and the engine can be started.

The sub-battery 9 of the power source selected by the power source changeover switch 16 in the control device 13 is converted from a DC power source (DC24V) to an AC power source (AC100V) by the DC / AC converter 19, and the hermetic electric compressor 23 is driven. . At this time, power is supplied from the main battery 4 via the relay changeover switch 22 to the condenser fan 26 (DC24V) that exchanges heat between the condenser 25 existing in the vehicle and the blower fan 28 (DC24V) that exchanges heat between the evaporator 27. Is. As described above, the car air conditioner can be comfortably used even when the vehicle is temporarily stopped (when idling is stopped) such as waiting for a signal while traveling. Home appliances can be used using the in-car outlet 29.

Instead of the hermetic electric compressor 23, a normal compressor may be used.

According to the present embodiment, since it can be used with an in-vehicle power source and a plurality of external power sources, the burden on the engine is reduced even when the vehicle is running and when the vehicle is stopped, thereby reducing the engine life and fuel consumption and saving costs. In addition, it is equipped with a sealed electric compressor, and heat is exchanged between the condenser and evaporator via a four-way switching valve, and cooling and heating are performed in the same system, eliminating the need for a conventional heating system and simplifying the air conditioner. . In addition, since the motor is driven by silent vibration, there is no CO2 emission, and socially, it can greatly contribute to environmental problems such as global warming, ozone layer destruction, and air pollution in accordance with the Kyoto Protocol.

In addition, the "control device" that integrates various functions and performs electrical control has been made compact so that this "automobile cooling and heating air conditioning system" can be performed smoothly, so that it can be installed in a wide range of vehicles from large trucks to passenger cars. With this control device, it is possible to select cooling and heating, charge on-vehicle batteries, supply power to existing fan motors and hermetic electric compressors, and use car air conditioners permanently. Note that the compactness of the control device 13 is due to the replacement of the charger with a switching method. In addition, the passenger car can use a 100 V household external power supply 11, and the current transformer 21 is not necessary, and the passenger car can be made compact.

In addition, by charging the sub-battery without any excess power from the main battery when the engine is driven, the battery is always fully charged, so that it can be used for a certain period of time even without the engine or without an external power supply. In addition, since the power of the sub battery can be supplied to the main battery in an unexpected situation such as a voltage drop, this “relay integrated connection device” is meaningful in the present invention.

In addition, the engine is not burdened when the automobile is running, and a constant air-conditioning temperature is maintained even when the vehicle is stopped, such as waiting for a signal. Therefore, idling stop running can be easily performed. This reduces vehicle life and fuel consumption, leading to cost savings. Also, by selecting multiple external power sources, it can be used for a long time regardless of parking lots such as truck stations, company garages, and convenience stores. Moreover, even during such use, the driver's fatigue can be reduced due to the quiet and static vibration characteristic of a hermetic electric compressor. In addition, since the cooling and heating are performed in the same system by the four-way switching valve, the conventional heating system is not required and the air conditioning system is simplified. However, in preparation for the sub-battery voltage shortage, this existing system is used only during winter driving. May be. Since the power source is a motor driven by electric power, there is no CO2 emission, and socially, it can greatly contribute to environmental problems such as global warming, ozone layer destruction and air pollution in accordance with the Kyoto Protocol. In addition, many adverse effects such as the burden of household expenses due to soaring fuel, pressure on management in the transportation industry, and noise damage to neighboring residents can be resolved.

FIG. 2 is a configuration diagram when “external power source (1)” is selected. A refrigerant system diagram when the cooling switch 17 selects cooling and the four-way switching valve 24 is actuated is indicated by a dotted line.

In a stationary vehicle that does not drive the engine, the external power source (1) is selected by the power switch 16 and the external power source (AC100V) 11 and the power input outlet 15 are connected by the connection cable 30. As a result, an AC power supply (AC100V) is obtained, and the hermetic compressor 23 is driven.

The AC / DC converter 20 converts AC (AC100V) to DC output (DC24V), and the power to each fan motor is connected via the relay changeover switch 22 without using the in-vehicle main battery 4 and external power. The condenser fan 26 and the blower fan 28 are driven. At that time, the circuit on the main battery 4 side is cut off. At this time, the sub-battery 9 is not used.

At the same time, the in-vehicle sub-battery 9 can be charged by the charger 18 at the same time.

In another embodiment, there is a method in which the external generator 12 is connected to the power input outlet 15 for use.

The external power source (2) is selected by the power source switch 16, and the external power source (AC200V) 10 and the external power source input outlet 14 are connected by the connection cable 31. As a result, an AC power supply (AC200V) is obtained. However, since the voltage is twice that of the external power source 1, it is stepped down to an AC power source (AC 100V) by the current transformer 21 and used. In this way, specifications for multiple / multi-phase (three-phase 200V) power supplies are provided.

1 Engine 2 Belt 3 On-vehicle generator 4 Main battery 5 Voltage sensor 6 Relay connection switch 7 Battery connection switch 8 Relay-integrated connection device 9 Sub battery 10 External power supply (AC200V)
11 External power supply (AC100V)
12 External generator (AC100V)
13 Control device 14 External power input socket (for AC200V)
15 External power input outlet (for AC100V)
16 Power switch 17 Refrigerant switch 18 Charger 19 DC / AC converter 20 AC / DC converter 21 Current transformer 22 Relay switch 23 Sealed electric compressor 24 Four-way selector valve 25 Condenser 26 Condenser fan 27 Evaporator 28 Blower fan 29 Inside the vehicle Outlet (AC100V)
30 Connection cable (for AC100V)
31 Connection cable (for AC200V)

Claims (2)

The DC current output from the in-vehicle generator during charging is charged, the main battery that is the power source of the fan motor that drives the fan, and the DC current output from the in-vehicle generator is supplied when the main battery is charged a predetermined amount A sub-battery, an electric compressor driven by an alternating current obtained by converting a direct current of the sub-battery into a direct current through a direct-current alternating current converter, and a heat exchange connected to the electric compressor via a switching valve a condenser and evaporator are carried out, and an external power source for supplying power for driving the electric compressor when the engine is stopped, and the AC-DC converter means for converting the alternating current of the external power supply into a direct current, the vehicle power supply and external power At least power switching means for switching between cooling and switching means for switching between cooling and heating. And the flow to the single system a cooling and heating air conditioning system of a motor vehicle capable of performing cooling and heating, when a predetermined amount charged to the main battery voltage sensor for detecting the predetermined amount, also detects the voltage drop of the main battery The relay-integrated connection means provided with this voltage sensor includes a relay connection switch for supplying surplus current of the main battery to the sub battery, and the sub battery to the main battery when the power of the main battery is insufficient. An automobile cooling / heating air conditioning system comprising at least a battery connection switch connected in parallel to the vehicle. The automobile air conditioning system according to claim 1, wherein a condenser and an evaporator are connected to the electric compressor via a four-way switching valve.

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