Performance test system and performance test method for top-mounted air-conditioning system

Abstract

The invention discloses a performance test system and performance test method for a top-mounted air-conditioning system. The performance test system includes a lab equipped with an air source supply device, an enthalpy difference air tunnel, an air treatment device, a compressor driving device and a head-on air speed simulation device. A condenser air inlet of a to-be-tested air-conditioner is provided with a temperature and humidity sensor and an air speed measuring device. An evaporator air inlet is provided with a temperature and humidity sensor and a differential pressure sensor. An evaporator air outlet is provided with a differential pressure sensor. An outlet of the air source supply device is communicated with the evaporator air inlet. The first air inlet of the air source supply device is communicated with indoor air. A mixing box, the temperature and humidity sensor and the air speed measuring device are disposed in the enthalpy difference air tunnel. An air inlet of the enthalpy difference air tunnel is communicated with the evaporator air outlet. The first air outlet of the enthalpy difference air tunnel is communicated with indoor air, and the second air outlet of the enthalpy difference air tunnel is communicated with the air source supply device. Air output from an evaporator and indoor air are mixed and then sent to the evaporator, so cold energy and heat energy of a test piece are fully utilized, and the energy consumption is reduced. Moreover, one room is saved, and the accuracy of a test result is improved.

Description

technical field [0001] The invention relates to a performance test technology of an automobile air-conditioning system, in particular to a performance test system and method using a roof-mounted air-conditioning system for similar vehicles such as buses. Background technique [0002] At present, the roof-mounted air-conditioning system is used in buses and other similar models. There is no unified national standard for the performance test method of this air-conditioning system. The industry is now referring to the performance test method of household air conditioners, that is, the test system is set in two rooms. Such as figure 1 As shown, it includes the evaporator room 1 on the first floor and the condenser room 2 on the second floor, the wind tunnel 3 is set in the evaporator room 1 on the first floor, and the overhead air conditioner 4 to be tested is installed in the condenser room on the second floor 2, the evaporator room 1 and the condenser room 2 are respectively ...

AI Technical Summary

Problems solved by technology

[0003] Since the roof-mounted air-conditioning system used in buses and other similar vehicles has certain structural specialties, such as the close distance between the evaporator and the condenser, the close distance between the air inlet and the air outlet, etc., it is necessary to install the tested air-conditioning system according to the actual use conditions. It is necessary to arrange the upper and lower parts of the laboratory into a two-layer structure, such as figure 1 As shown, not only the construction is difficult, but also it is difficult to install the test piece in use

In addition, this type of air conditioner is usually installed on the vehicle, and the impact of the vehicle running speed on the performance test of the air conditioning system has not been considered in the existing test structure and method, which leads to low accuracy of the test results

At the same time, the power of this top-mounted air conditioning system is relatively large, usually tens of kilowatts. When the test system is divided into two rooms, the cooling and heating of the tested machine need to be balanced, and the energy consumption is huge.

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