Air-flue-free modular electric bus air conditioning unit

Abstract

The invention relates to an air-flue-free modular electric bus air conditioning unit. A condenser assembly is of a frame structure without a bottom shell, a condenser core and an evaporator core are of an inclined finned tube fin type structure, and two axial flow centrifugal integrated fans are adopted; the condenser assembly is arranged on a frame ceiling of a bus; an evaporator assembly is arranged in the position opposite to the condenser assembly, and the evaporator core is of a tube fin type structure; an electronic expansion valve is used as a throttling device, and the flow amount of a refrigerant entering the evaporator assembly is controlled through a pulse motor switching valve element; the portion, higher than the condenser assembly, of an electric compressor assembly is made to pass through a bus ceiling skylight to sink and be concealed in the bus compartment ceiling; an electric compressor is of a two-stage damping structure and fixed to a frame, and then the electric compressor and the bus ceiling are sealed. The modular concept is introduced into the air-flue-free modular electric bus air conditioning unit, one electric bus air conditioning unit is an air conditioning module, and the air-flue-free modular electric bus air conditioning unit is compact in structure, capable of being equipped standardly according to requirements of different bus types and different users and very convenient to produce on a large scale, install and maintain.

Description

technical field [0001] The invention relates to the technical field of design and manufacture of passenger car air conditioners, in particular to a ductless modular electric passenger car air conditioner unit suitable for installation and use in electric passenger cars with a height of 5 to 13.7 meters. Background technique [0002] Existing electric buses generally use roof-mounted integrated air-conditioning systems. Considering the air-conditioning installation space, the convenience of maintenance, and the timely replacement of wearing parts, the layout of roof-mounted air conditioners has become the main choice for installing air-conditioning systems in large and medium-sized buses. . However, for 5-13.7-meter electric buses, the models are different, and different roof-mounted air conditioners need to be used to match them, which requires different products, which is not conducive to large-scale production. In addition, the heat exchanger of the roof-mounted integrate...

AI Technical Summary

Problems solved by technology

However, for 5-13.7-meter electric buses, the models are different, and different roof-mounted air conditioners need to be used to match them, so that different products are required, which is not conducive to large-scale production

In addition, the heat exchanger of the roof-mounted integrated air-conditioning system mostly adopts the tube-sheet structure, the number of tube rows is large, and the air resistance is relatively large. The power consumption of the fan is large

Third, due to the height restriction of the electric compressor of the top-mounted integrated air-conditioning system, imported compressors or products of enterprises with foreign capital background are generally used, and the COP of large-displacement electric compressors is generally relatively low. The improvement of the performance of the whole machine is very unfavorable

The above-mentioned deficiencies make it difficult to improve the energy efficiency ratio of the existing air conditioner for electric passenger cars. Due to the large resistance of the heat exchanger and the large energy consumption of the fan, the problem of large energy consumption is unacceptable for electric passenger cars.

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