Parking air conditioning——allows driver to work efficiently in hot summer

Category: Journal

What is parking air conditioning?

Parking air conditioner is a kind of interior air conditioner, which refers to the equipment that uses vehicle DC power supply (12V/24V/48V) to maintain the operation of the air conditioner when the driver stops or needs to rest, with the purpose of adjusting and controlling the temperature, humidity, flow rate and other parameters of the air in the vehicle.

Why do you need a professional parking air conditioner?

Drivers are prone to discomfort when facing hot weather for a long time, and need air conditioning to create a comfortable working environment. Traditional vehicle air conditioners rely on engine power, which consumes fuel and the engine is easy to wear. In idle conditions, even outdoors, if there is no wind, carbon monoxide can accumulate around the vehicle, and the longer the time, the higher the concentration. At this time, if the vehicle is driven by external circulation, the carbon monoxide outside the vehicle may be inhaled  in large quantities, causing carbon monoxide poisoning. Professional parking air conditioners can easily solve these problems, so they are widely adopted in the market.


Scenarios of parking air conditioner

Truck driver: Drivers always need to stop on the side of the road or in a parking lot to rest, and parking air conditioning can provide a comfortable temperature to the cab without starting the engine, improving the quality and safety of the break.

RV enthusiasts: These enthusiasts like to travel around in their RVs, and sometimes need to sleep in the wild or in places where there is no mains. Parking air conditioners can use batteries or generators to cool or heat RV , adding to the fun and comfort of travel.

Special vehicles: This type of vehicle includes ambulances, police cars, fire trucks, military vehicles, etc., which may need to stay in a specific location for a period of time when performing their tasks, and have requirements for suitable temperature . Parking air conditioning can provide a constant temperature environment for these special vehicles, ensuring the mission went smoothly

Advantages of parking air conditioning

1.Lower costs: Battery-powered, zero fuel consumption. Intelligent speed control optimizes the battery life of the air conditioner for 3-8 hours, which will not cause wear and tear on the engine and reduce maintenance costs

2.Higher safety :Using the vehicle air conditioner, when the engine is idling , a large amount of exhaust gas will be generated, which contains harmful substances such as carbon monoxide, can easily cause poisoning or suffocation. Parking air conditioning, does not have these problems and ensures the safety and health of the driver.

3.More comfortable:when the vehicle is stopped in summer, the temperature in the cab will quickly rise , affecting the driver's rest and sleep. The parking air conditioner can adjust the temperature as needed to maintain a comfortable environment.

Divided according to the installation location

Roof-mounted parking air conditioning



The fuselage is thin and light, and the external unit adopts a streamlined design, which has less wind resistance;

It can use the hole position of the original car for non-destructive installation, and the multi-directional air outlet has a larger angle and wider coverage

Back-mounted parking air conditioning



Small size, variable installation position,low noise ,easy installation.

Installation precautions:

The installation of parking air conditioning requires professional technicians and equipment, and it is necessary to pay attention to choosing the appropriate position and direction during installation to avoid affecting the appearance and modification of the vehicle, and also pay attention to waterproof, dustproof, shockproof and other details. After the installation is completed, it is necessary to test and debug to ensure the normal operation of the parking air conditioner.

Energy input of parking air conditioning system

1.Original vehicle battery: Simple way, but high power consumption, the conventional original vehicle battery is not able to ensure the long-term use of the parking air conditioner, and the damage to the original vehicle battery is also relatively large due to frequent charging and discharging.

2.Add extra batteries: like 12V, 24V,48V lithium batteries. According to experience, the 24V 200Ah lithium battery for parking air conditioning can be used for about seven or eight hours, and the specific data needs to be obtained according to the respective vehicle conditions and environment.

3.Diesel generators: In terms of safety, it is much higher than that of gasoline generators, but it is noisy and generally not be used.

The aspects of optimization

1.Improving the energy efficiency ratio of parking air conditioners, reducing power consumption, and extending battery life;

2.Using frequency conversion technology , adjusting the power and speed automatically based on the temperature demand, saving electric energy;

3.Taking integrated design reduces the connection lines of the internal and external units and simplifying the installation process;

4.Taking intelligent control is adopted to realize remote operation, fault diagnosis, automatic protection and other functions

The core of parking air conditioning--- Compressor

A compressor is a driven fluid device that elevates low-pressure gas to high-pressure gas. It sucks in low-temperature and low-pressure refrigerant gas from the suction pipe, drives the piston to compress it through the operation of the motor, and then discharges high-temperature and high-pressure refrigerant gas to the exhaust pipe, providing power for the refrigeration cycle. Thus achieving a refrigeration cycle of compression, condensation (heat release), expansion, and evaporation (heat absorption).

Solutions for occupation height and noise of Roof-mounted AC

Boyang compressor adopts horizontal twin-rotary compressor, which occupies less height of the car.Due to stable operation and low vibration, the noise of the compressors is lower than the single rotary compressor. That is, under the same compressor displacement, the sound power level noise of the Twin rotary compressor is 3-5 dB lower than that of the single one.


Twin Rotary

Two 180° opposite compression chamber drastically improves the dynamic balancing and torque ripple characteristics,improves mechanical efficiency, helps to provide a silent operation and broad rpm range

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Reliable Oil Supply

Mature oil supplying mechanism to pump oil into cylinder within maximum 45° angel, working on a ramp would not be problem.

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Wide RPM Range

Lower minimum speed helps to save energy, especially critical when powered by lithium battery. Higher RPM brings faster cooling experience.

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DC inverter compressor

Boyard JFSB116Z12 compressor can be driven by DC 12V , with a maximum rated input power of 555w and a maximum rated input current of 46.3A. The compressor can automatically adjust the speed of the compressor according to the change of room temperature to achieve the purpose of noise reduction, energy saving and comfortable temperature control.

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Factors affecting the service time of parking air conditioning

1.Battery capacity: It directly affects the usage time of the parking air conditioning. The larger the capacity, the longer the usage time

Taking Boyard parking air conditioner as an example, its electrical parameters indicate that the rated input voltage is 24V, the rated input current is 30A, and the rated input power is 24V*30A=720W. Assuming that a new group of batteries with a capacity of 180AH are used, the group of batteries can discharge 180AH*24V* (1-25%) =3240WH at most. In the formula, 25% is the power required to ensure the normal start of the engine. Ideally, the parking air conditioner can be used for 3240WH/720W=4.5H.

2.Environment temperature :The lower the outdoor ambient temperature, the less heat load the cab needs to cool down. At this time, the compressor operates at low frequencies, which is the most energy-efficient;

3.Input power:The lower input power of the parking air conditioning, the longer it will be used

We hope nature can become a resource that everyone can enjoy and explore - Sustainable Development

According to a new proposal from the US Environmental Protection Agency, starting from 2025, all common HFC refrigerants with higher GWP (including R134a, R404A, and R410A) will be prohibited from being used in most refrigeration and air conditioning applications.

Boyang launched Latest compressor products with R32、R290 as refrigerant.

Why Choose BOYARD?

√Mature technology and R&D team to support customer customization needs

√First-class customer service before, during, and after sales

√Excellent cooling and diverse exclusive AC design products

√Good cooperative relationships with domestic and foreign customers, exported to Europe, North America, the Middle East, Southeast Asia and other places

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