Online diagnosis method for filth blockage of air filter of railway vehicle air-conditioning system
An air filter and air-conditioning system technology, applied in the field of rail vehicle air-conditioning system, can solve the problems of increased air-conditioning maintenance costs, air-conditioning water spray or evaporator icing, and poor air-conditioning refrigeration, so as to reduce maintenance costs and ensure normal operation. Effect
Active Publication Date: 2021-03-02
石家庄国祥运输设备有限公司
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[0003] At present, the cleaning of the air filter in the vehicle air conditioner is generally in accordance with the maintenance principle of regular cleaning and replacement, that is, it is cleaned or replaced within the specified period, and the impact of the air quality of the vehicle operating environment has not been fully considered.
Regular maintenance and cleaning of the filter screen cannot completely avoid the normal operation of the air conditioner due to untimely cleaning and maintenance of the filter screen and the increase in maintenance costs due to excessive maintenance
The specific performance is: when the filter screen is dirty and clogged, but before the maintenance period, the filter screen cannot be cleaned or replaced in time, which may cause the air conditioner to spray water or the evaporator to freeze, resulting in poor cooling of the air conditioner and insufficient indoor air supply. This affects the normal operation of the air conditioner; on the other hand, the maintenance time has come, but the filter screen is still relatively clean, and the cleaning and maintenance work arranged at this time will increase the workload and maintenance costs
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[0014] Referring to the accompanying drawings, the present invention provides a method for online diagnosis of air filter dirty clogging in an air-conditioning system of a rail vehicle, including the following steps.
[0015] Step A. After the ventilator in the air conditioning system is started, if the following conditions are met at the same time, go to step B; otherwise, the online diagnosis of air filter dirty and clogged will not be performed.
[0016] (1) The fan is running at a constant speed and the return air valve is fully open.
[0017] The ventilator plays the role of supplying air to the compartment, and its constant speed operation refers to the speed at which the blower operates in a defined state; this may be related to other controls of vehicle operation. For example: if the fan is of two speeds, the fan can run at a low speed when the vehicle enters the station, and it also meets the conditions for judging the dirty filter (vehicle speed is low); if the frequ...
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The invention discloses an online diagnosis method for filth blockage of an air filter of a railway vehicle air-conditioning system. The method comprises the steps of A after a ventilator in the air-conditioning system is started, if the following conditions are simultaneously met, entering a step B: (1) the ventilator is in a constant-speed running state and an air return valve is in a full-openstate; and (2) the running speed of a vehicle is 0 to 100 km / h; B comparing the pressure difference between the two sides of the air filter, if the pressure difference is larger than or equal to deltaP or the preset value of a pressure difference controller and lasts for T1, recording early warning once, and otherwise executing the step A again; and C if the number of early warning times continuously recorded within a certain time exceeds N, sending out an air filter filth blockage early warning signal. The state of the air filter in the air conditioner can be monitored when the vehicle runs,the early warning information is sent out when the filth blockage of a filter screen reaches the preset state, the filter screen is cleaned or replaced in time, normal running of the air conditioneris effectively guaranteed, and the maintenance cost of the air filter is reduced.
Description
technical field [0001] The invention belongs to the technical field of rail vehicle air-conditioning systems, and in particular relates to an online diagnosis method for air filter dirty and clogged in the rail vehicle air-conditioning system. Background technique [0002] With the development of industrial control technology and network technology, rail vehicle air conditioners are a public transportation product, and their stable and safe operation is very important; the air filter is installed in the rail vehicle air conditioner to filter the outdoor fresh air and the return air in the passenger room, providing clean and fresh air for the interior. The air can improve and maintain the freshness of indoor air. [0003] At present, the cleaning of the air filter in the vehicle air conditioner is generally in accordance with the maintenance principle of regular cleaning and replacement, that is, it is cleaned or replaced within the specified time limit, and the impact of the...
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IPC IPC(8): B61D27/00
CPCB61D27/0018
Inventor 杨玉茹彭玉龙张宝
Owner 石家庄国祥运输设备有限公司