Back-mounted electric bus air conditioner

Abstract

The invention relates to a back-mounted electric bus air conditioner comprising a triple-tier frame structure, a control and power supply system portion, an upper structure, a lower structure and a bottom structure. The control and power supply system portion is disposed at the top end of the frame structure and controls parts through a frequency converter. The upper structure comprises an upper left evaporator blower, an upper right evaporator blower, a lower evaporator blower and an evaporator core and is provided with an upper evaporating air outlet and an evaporator air return opening. The lower structure comprises a condensing blower, a condenser core, an expansion valve, a dryer, an electric compressor, a metal bellows, a gas-liquid separator and a four-way valve and is provided with a condenser air inlet, a condenser air outlet and a lower evaporating air outlet. The bottom structure comprises an insulating pad and a damping pad. The back-mounted electric bus air conditioner is in an overall unit-part structure; the back-mounted electric bus air conditioner is mounted at the rear of an electric bus; the requirement of the electric double-deck bus for conditioner structure is better met; air supply is reasonably distributed for upper and lower decks by the variable frequency technology, an air supply temperature difference is reduced, and riding comfort can be improved. The back-mounted electric bus air conditioner has a higher energy efficiency ratio.

Description

technical field [0001] The invention relates to the technical field of design and manufacture of passenger car air conditioners, in particular to an electric passenger car air conditioner, which is a rear-mounted electric passenger car air conditioner suitable for double-deck electric passenger cars. Background technique [0002] At present, the air conditioners of double-deck electric buses on the market are mainly temporarily assembled according to the product design or user requirements, and there is no special air conditioner for electric buses. Therefore, the air-conditioning devices of the existing double-decker electric buses are often non-standard and imperfect products, and their shortcomings mainly include: (1) The cooling capacity is low: the evaporative air volume is relatively small, and the front and rear air supply is uneven; the distribution of the evaporative air volume between the upper and lower floors cannot be controlled , The temperature difference betw...

AI Technical Summary

Problems solved by technology

Therefore, the air-conditioning devices of the existing double-decker electric buses are often non-standard and imperfect products, and their shortcomings mainly include: (1) The cooling capacity is low: the evaporative air volume is relatively small, and the front and rear air supply is uneven; the distribution of the evaporative air volume between the upper and lower floors cannot be controlled , the temperature difference between the upper and lower floors is large and the air conditioners on the upper and lower floors cannot be turned on or off independently

⑵ high energy consumption

⑶The comfort of the whole vehicle is poor, and the vibration and noise of the air conditioner are difficult to control

⑷High electrical failure rate and low energy efficiency ratio COP

(5) Poor assembly and maintainability, which makes it difficult for electric buses to meet the requirements of vehicle cooling loads in China's vast regions and climatic conditions

[0003] Existing electric buses generally use roof-mounted integrated air conditioners. However, for double-decker electric buses, the model itself is relatively high, and the roof-mounted air conditioner is used to make the car body taller.

Since the heat exchanger of the top-mounted air conditioner mostly adopts a tube-sheet structure, the number of tube rows is large, and the air resistance is relatively large, which requires a large pressure head of the fan. In addition, the layout of the air duct and air outlet of the passenger car is different, which will lead to power consumption of the fan. bigger

In addition, due to the height restriction of the electric compressor of the top-mounted integrated air conditioner, its energy efficiency ratio is generally relatively low

Therefore, the roof-mounted integrated air conditioner is not necessarily suitable for double-decker electric buses.

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