A method for regulating and controlling the cooling capacity of a multi-compressor air-conditioning unit and an air-conditioning unit for a rail vehicle
An air-conditioning unit and regulation control technology, which is applied in high-efficiency regulation technology, railway vehicle heating/cooling, transportation and packaging, etc. It can solve the problems of frequent start and stop of fixed-frequency air conditioners, lag in cooling capacity regulation, and frequent start and stop of compressors. , to shorten the stabilization time, avoid frequent start and stop, and reduce fluctuations
Active Publication Date: 2022-07-12
SHANDONG LONGERTEK TECH CO LTD
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Problems solved by technology
[0003] One is to control the start and stop of the compressor through the pressure or temperature of the refrigeration system, and the cooling capacity adjustment has hysteresis;
[0004] Second, it will cause the compressor to start and stop frequently, the indoor temperature fluctuates greatly, and the temperature control accuracy is low
In order to solve the above problems, it is necessary to find a new control method for adjusting the cooling capacity of track air conditioners, solve the problem of frequent start and stop of fixed frequency air conditioners, improve temperature control accuracy, and improve passenger comfort
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[0037] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0038] In this embodiment, taking the air conditioning unit for rail vehicle as an example, the composition of the refrigeration system of the air conditioning unit and the corresponding cooling capacity adjustment control method are introduced.
[0039] like figure 1 As shown, a refrigeration system for an air conditioning unit of a rail vehicle includes an evaporator 1, a condenser 2, and a throttling device 4. A compressor 2 is arranged between the condenser 2 and the evaporator 1, and each compressor 2 is connected to at least one A bypass valve 5 realizes high and low temperature unloading. At least one group of the refrigeration systems is called for each car box. Multiple groups of refrigeration systems in multiple cars are connected to the same main control board for unified control to form an air conditioning unit with multiple...
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The present invention provides a method for regulating and controlling the cooling capacity of a multi-compressor air-conditioning unit, and further provides an air-conditioning unit for a rail vehicle, which adopts the above-mentioned method for regulating and controlling the cooling capacity of a multi-compressor air-conditioning unit to control the cooling capacity output of a multi-compressor and a multi-bypass valve. Control, solve the problem of frequent start and stop of fixed-frequency air conditioners, improve temperature control accuracy, and improve passenger comfort.
Description
technical field [0001] The invention relates to the technical field of refrigeration and heat exchange, in particular to a method for regulating and controlling the cooling capacity of a multi-compressor air conditioner unit and an air conditioner unit for rail vehicles. Background technique [0002] At present, the cooling capacity adjustment of the rail fixed-frequency air conditioner is mainly controlled by controlling the start and stop of the compressor through the pressure or temperature of the refrigeration system. The bypass valve in the fixed frequency air conditioner is mainly used for high and low temperature unloading to prevent the system pressure from being large at high temperature and freezing at low temperature. There are two problems in the existing fixed frequency control method: [0003] One is to control the start and stop of the compressor through the pressure or temperature of the refrigeration system, and the cooling capacity adjustment has a hystere...
Claims
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IPC IPC(8): B61D27/00
CPCY02T30/00
Inventor 李敬茂曹臣张峻铖葛安民蒋士民王鹏董洪建刘峰
Owner SHANDONG LONGERTEK TECH CO LTD