CN103057382A - Electric air conditioning system for fuel/gas vehicles - Google Patents

Abstract

The invention relates to an electric air conditioning system for a fuel/gas automobile, which comprises an evaporator assembly, a condenser assembly, a compressor, a throttling element and an electric control assembly, wherein the compressor is an electric compressor, the electric compressor is electrically connected with a generator, a storage battery and a compressor driver, and the generator is driven by an output shaft of an automobile engine in a belt transmission mode. The invention uses the electric compressor to replace the prior belt pulley type compressor which is directly driven by the belt pulley through the automobile engine, so as to lead the whole air conditioning system to run, and the beneficial effects are as follows: the fuel oil/gas engine does not directly drive the compressor, but converts the kinetic energy of the engine into electric energy through the generator, and then the electric energy drives the compressor.

Description

Electric air conditioning system for fuel/gas vehicles

Technical field:

The invention relates to the technical field of automobiles, in particular to an electric air-conditioning system for fuel/gas automobiles.

Background technique:

The traditional fuel/gas-driven automotive air-conditioning system and its energy supply system are composed of: a pulley compressor driven by the engine through a belt, a throttling tube, an evaporator and a fan, a condenser and a fan, a temperature sensor, an air duct and Electrical controller and other components. Its characteristic is that the operation of the compressor needs to be driven by a fuel/gas engine through a belt, or by a hydraulic motor of a hydraulic system (such as an engineering vehicle). The condenser fan is generally directly connected to the engine, and the cooling effect is directly determined by the engine speed. This is also the biggest problem with traditional automotive air conditioners:

1. When parking, the engine must be started before the air conditioner can be turned on. At this time, the energy utilization rate of the engine is very low, almost consuming fuel in vain, and causing huge exhaust emissions;

2. At idle/low speed operation, the cooling effect of the air conditioner is not good, the compressor load is heavy, and the oil return is poor. Due to the unstable engine speed, a large displacement compressor must be used to meet the cooling requirements at low speed;

3. For fixed-displacement compressors, when running at high speed, the cooling effect of the air conditioner is stronger than the demand, and the clutch of the compressor needs to be disconnected frequently to keep the temperature inside the car from being too low;

For the above problem 3, for the compressor that has adopted variable displacement, it is to control the circulation of refrigerant through the internal variable displacement of the compressor to control the temperature inside the car.

Even the compressor with variable displacement does not solve the previous two problems.

Invention content:

The object of the present invention is to overcome the above-mentioned shortcomings of the prior art, provide an electric air-conditioning system for fuel/gas vehicles, and solve the above-mentioned problems.

The technical solution adopted by the present invention to achieve its purpose is: an electric air-conditioning system for fuel/gas vehicles, including an evaporator assembly, a condenser assembly, a compressor, a throttling element and an electrical control assembly, wherein the compressor is an electric compressor The electric compressor is electrically connected with a generator, a storage battery and a compressor driver, and the generator is driven by the output shaft of the automobile engine through a belt drive.

The electric compressor and the compressor driver are integrated in a box, and the surface of the box is provided with a working medium inlet and a working medium outlet communicating with the electric compressor.

The compressor driver is provided with a standard mode drive circuit and a night mode drive circuit.

The compressor driver is provided with a wireless remote control circuit, correspondingly equipped with a remote control.

A protection circuit is also provided in the compressor driver.

The generator can be a direct current generator or an alternating current generator; the generator can be a generator that has a higher output power than the original car standard generator and replaces the original car standard generator, or it can be a new one directly added. dynamo.

The storage battery can be an expansion storage battery of the original vehicle, or can also be an additional new storage battery.

The electric compressor can be a DC electric compressor or an AC electric compressor.

A low pressure protection monitor connected to the compressor driver is also installed in the working medium pipeline of the air conditioning system.

The present invention uses an electric compressor to replace the existing belt pulley compressor directly driven by the automobile engine to make the entire air conditioning system run. The beneficial effect is that the fuel/gas engine does not directly drive the compressor, but the generator Convert its kinetic energy into electric energy, and then drive the compressor by electric energy. Due to the storability of electric energy, even when the engine stops working, the electric compressor can still run, so that the entire air conditioning system can still be used in the parking state. , saving fuel/gas; moreover, the operation of the electric compressor will not be affected by the speed of the car engine, which can maintain a stable cooling effect; on the other hand, the operation of the electric compressor will not affect the car engine, which can avoid the The power of the vehicle is affected when the system is running.

The invention completely solves the three biggest problems of the traditional fuel/gas vehicle air conditioning system, and has high operating efficiency and convenient layout, and is suitable for various fuel/gas vehicles, especially for the air conditioning system of existing trucks and engineering vehicles. Modification is conducive to promoting the progress of vehicle air-conditioning technology.

Description of drawings:

Fig. 1 is a structural representation of the present invention;

Fig. 2 and Fig. 3 are schematic diagrams of the arrangement structure of the integrated electric compressor and compressor driver in the present invention.

Detailed ways:

The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

As shown in Figure 1, the electric air-conditioning system for fuel/gas vehicles of the present invention includes common components in the existing air-conditioning system, such as evaporator components, condenser components, compressors, throttling elements, electrical control components and Working fluid pipelines and air ducts, etc., wherein the evaporator assembly includes an evaporator 9 and an evaporation fan 10, the condenser assembly includes a condenser 6 and a condensation fan 7, and the throttling element 8 is an expansion valve or a capillary tube; the improvement of the present invention In that: the compressor is an electric compressor 5, the electric compressor 5 is electrically connected with a generator 1, a storage battery 2 and a compressor driver 4, and the generator 1 is driven by the output shaft of the automobile engine through a belt way driven. That is, the electric compressor 5 is used to replace the existing belt pulley compressor directly driven by the automobile engine, the generator 1 is installed at the installation place of the existing belt pulley compressor, and the existing pulley compressor is canceled to generate electricity. The machine 1 works and generates power under the driving of the automobile engine, and the electric energy sent is transmitted to the battery 2 for storage, and the battery 2 supplies power to the compressor driver 4 and the electric compressor 5, so that the electric compressor 5 operates.

Specifically, the generator 1 can be a DC generator or an AC generator; the generator can be a generator that has a higher output power than the original car standard generator and replaces the original car standard generator, or can be It is a new generator that is directly added. The better solution is to replace a generator with a larger output power, which can save installation space. The storage battery 2 can be an expansion storage battery of the original vehicle, or a new storage battery can be added, and the preferred solution is to use an expansion storage battery to save space. The electric compressor 5 can be a direct current electric compressor or an alternating current electric compressor.

As shown in FIG. 2 and FIG. 3, the electric compressor 5 and the compressor driver 4 are integrated in a box body 3, and the surface of the box body 3 is provided with a working fluid inlet 31 communicating with the electric compressor and The working medium outlet 32, of course, conventional electronic components (not shown in the figure) such as relays and fuses connected to the compressor driver 4 are also arranged in the box body 3 . In the present invention, the electric compressor 5 and the compressor driver 4 are integrated in a box body 3, which makes the assembly and connection of the entire air conditioning system easier, and at the same time, it can be remotely connected with the battery 2 through wires, so its installation It can not be limited to the narrow space at the front engine of the car, but can be installed on the body of the car, such as the space under the rear seat of the car, etc.;

The compressor driver 4 is provided with a standard mode driving circuit and a night mode driving circuit. The standard mode drive circuit means that the compressor driver controls the electric compressor to run at a standard speed; the night mode drive circuit means that the compressor driver controls the electric compressor to run at a low speed, so that the system operates with low power consumption, less noise, and longer battery life. usage time.

The compressor driver 4 is provided with a wireless remote control circuit 11, which is correspondingly equipped with a remote control 14, which can remotely control the air conditioning system; the wireless remote control mode can more easily accept the adjustment instructions of the personnel in the car, and facilitate the adjustment of cooling capacity, and Freely control energy consumption; and some command functions integrated on the remote control can simplify the design of the control panel in the car, which makes the control panel more concise and more convenient to use, and also improves the dustproof and waterproof protection of electronic components.

A protection circuit is also provided in the compressor driver 4 . The protection circuit is to ensure that the use of the air conditioner will not cause the car voltage to be too low and cause poor start-up when starting. The protection circuit can be over-current protection or voltage detection protection in the form of protection. For example, the battery low voltage protection function can be set, and adjustable gears can be set, at least 2 gears or more can be set. For example, for a specific 24VDC voltage system, the low-voltage protection value can be set to 22VDC, 23VDC, 24VDC and other gears. The user can set the appropriate gear through the remote control according to the actual situation of the vehicle, so that the running time of the air conditioning system is the longest. It can ensure that the car can start reliably.

Of course, in addition to the voltage protection of circuit control, a low pressure protection monitor 15 connected to the compressor driver 3 is also provided in the working medium pipeline to monitor the pressure of the working medium in the pipeline. When refrigerant leakage occurs, the compressor Drive 3 will shut down for system safety.

The present invention utilizes the electric compressor to replace the existing pulley type compressor directly driven by the automobile engine with the pulley to make the whole air-conditioning system run, and its beneficial effects are as follows: the fuel/gas engine does not directly drive the electric compressor 5, The kinetic energy is converted into electric energy by the generator 1, and then the electric energy is used to drive the electric compressor. Due to the storability of electric energy, even when the engine stops working, the electric compressor can still run, so that the entire air conditioning system is running It can still be used in the parking state; moreover, the operation of the electric compressor will not be affected by the speed of the car engine, and can maintain a stable cooling effect; on the other hand, the operation of the electric compressor will not affect the car engine, which can avoid The power of the car is affected when the air conditioning system is running.

The invention completely solves the three biggest problems of the traditional fuel/gas vehicle air conditioning system, and has high operating efficiency and convenient layout, and is suitable for various fuel/gas vehicles, especially for the air conditioning system of existing trucks and engineering vehicles. Modification is conducive to promoting the progress of vehicle air-conditioning technology.

Those skilled in the art do not depart from the essence and spirit of the present invention, there can be many variants to realize the present invention, the above description is only a preferred and feasible embodiment of the present invention, and it does not limit the scope of rights of the present invention. The equivalent structural changes made in the description of the invention and the accompanying drawings are all included in the scope of rights of the present invention.

Claims (9)

1. Electric air-conditioning system for fuel/gas vehicles, including evaporator assembly, condenser assembly, compressor, throttling element and electrical control assembly, characterized in that: the compressor is an electric compressor, the electric compressor and A generator, storage battery and compressor driver are electrically connected, and the generator is driven by the output shaft of the automobile engine through a belt drive. 2. The electric air-conditioning system for fuel/gas vehicles according to claim 1, characterized in that: the electric compressor and the compressor driver are integrated in a box, and the surface of the box is provided with the electric compressor The working fluid inlet and working fluid outlet connected to the machine. 3. The electric air-conditioning system for fuel/gas vehicles according to claim 1, wherein the compressor driver is provided with a standard mode drive circuit and a night mode drive circuit. 4. The electric air-conditioning system for fuel/gas vehicles according to claim 1 or 3, characterized in that: the compressor driver is provided with a wireless remote control circuit, correspondingly equipped with a remote control. 5. The electric air-conditioning system for fuel/gas vehicles according to claim 1 or 3, wherein a protection circuit is also provided in the compressor driver. 6. The electric air-conditioning system for fuel/gas vehicles according to claim 1, characterized in that: the generator can be a DC generator or an AC generator; the generator can generate electricity compared to the original vehicle standard The engine output power is big, the alternator that replaces original car standard alternator, also can be the new alternator that increases directly. 7. The electric air-conditioning system for fuel/gas vehicles according to claim 1, characterized in that: the storage battery can be an expansion storage battery of the original vehicle, or can also be a new storage battery. 8. The electric air-conditioning system for fuel/gas vehicles according to claim 1, wherein the electric compressor can be a DC electric compressor or an AC electric compressor. 9. The electric air-conditioning system for fuel/gas vehicles according to claim 1, characterized in that: a low-voltage protection monitor connected to the compressor driver is also provided in the working medium pipeline of the air-conditioning system.

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