Sheet Metal · 2023年5月12日

Send the conditioned air into the car and reach the top

The characteristics of the air conditioner for railway vehicles The cooling principle of the air conditioner for railway vehicles is the same as that of a general air conditioner. However, because it is installed on a vehicle, it has the following characteristics: first, its installation location, installation space, and use of power are strictly restricted; second, its cooling capacity is much greater than that of ordinary building air conditioners, and so on. Installation site and space Railway vehicles generally have a van-shaped structure. In order to maximize the space in the carriage, electrical equipment such as traction devices, auxiliary power devices, braking devices, and air-conditioning devices are installed on the roof and under the floor. The structure of the air-conditioning device is also different due to the different installation positions. Under-floor installation The air-conditioning device is installed under the floor of the vehicle, which lowers the center of gravity of the vehicle, which is beneficial to the speeding of the vehicle. Recently, almost all air-conditioning units of the Shinkansen have been installed under the floor. However, this method also has its shortcomings. In order to send the conditioned air into the car and reach the top, it is necessary to install a blower and lay corresponding pipes. In addition, since traction devices and auxiliary power supplies are installed under the floor, it is necessary to ensure the installation space of the air conditioner. The installation on the roof is represented by commuter vehicles, and many vehicles adopt the method of installing air conditioners on the roof. Its advantages are that its air-conditioning ducts are simplified, and the installation of the air-conditioning device is also easier, which is conducive to the small size and light weight of the vehicle. Its disadvantages are: firstly, the top of the vehicle is restricted by vehicle boundaries, and its installation space is limited; secondly, the center of gravity of the vehicle is increased, which is not conducive to high speed. Therefore, in recent years, this installation method has been mostly used on vehicles with low speeds such as commuting, suburban electric vehicle units, and subways. Installation on the floor When there is no space under the roof and floor, use the space in the guest seats to install air conditioners, which are similar to store air conditioners. The floor is installed on double-decker passenger cars and vehicles whose passenger compartment is a viewing car. When there is no space for air conditioning under the floor, install the air conditioner in the space between the passenger compartment floor and the underframe of the car body. The split split air conditioner is composed of an indoor unit and an outdoor unit. The outdoor unit is installed under the floor, and the indoor unit is installed indoors or on the roof. It is mainly used for new traffic and tilting trains. Air-conditioning device for railway vehicles Yasuo Hakataya (Japan) railway vehicles obtain electricity from the catenary, and its power source is a DC power supply or a single-phase AC power supply. Air conditioning for the Shinkansen The Shinkansen started in 1964 and installed air conditioning on all vehicles. At that time, air conditioners were installed on the roof of the car. Recently, as the speed of trains has increased, almost all air conditioners have been installed under the floor of the car. Air conditioners for subways reduce the size of subway tunnels, which can reduce construction costs. Most subways use the third rail power supply method. This method does not need to have a pantograph on the roof of the car, which can reduce the size of the subway tunnel, and the size of the roof can also be close to the size of the tunnel. In this way, it is extremely difficult to install an air conditioner on the roof of the vehicle. For automotive parts and parts machining, PTJ Shop offers the highest degree of OEM service with a basis of 10+ years experience serving the automotive industry. Our automotive precision shop and experts deliver confidence. We have perfected the art of producing large component volumes with complete JIT reliability, backed by the quality and long-term reliability our customers expect.

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