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Multi-stage refrigeration control method of railway vehicle air conditioning unit

A technology for air conditioning units and refrigeration control, which is applied in the heating/cooling of railway vehicles, railway car body parts, transportation and packaging, etc. The effect of power consumption

Active Publication Date: 2021-01-29
石家庄国祥运输设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

but led to an increase in cost

Method used

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  • Multi-stage refrigeration control method of railway vehicle air conditioning unit
  • Multi-stage refrigeration control method of railway vehicle air conditioning unit
  • Multi-stage refrigeration control method of railway vehicle air conditioning unit

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Embodiment Construction

[0013] The present invention provides a multi-stage refrigeration control method for rail vehicle air-conditioning units, which is based on the air-conditioning units with two fixed-frequency compressors arranged in parallel in a refrigerant circulation loop, comprising the following steps.

[0014] Step A, calculate the cooling demand in real time, perform step B when one fixed-frequency compressor needs to be operated, and perform step C when two fixed-frequency compressors need to be operated.

[0015] Step B. Detect whether the power supply status of the vehicle satisfies the power requirements for the operation of the fixed-frequency compressor under the current cooling demand. If not, send a power demand signal for changing the frequency conversion voltage to the vehicle control system. When it is detected that the power supply status meets the cooling demand, control a fixed frequency compressor. The frequency compressor is running under the current power state. The pow...

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Abstract

The invention discloses a multi-stage refrigeration control method of a railway vehicle air conditioning unit, which belongs to the technical field of railway vehicle air conditioners and comprises the following steps of: A, calculating refrigeration requirements in real time, and executing a step B or a step C according to requirements; B, controlling a fixed-frequency compressor to operate in aspecified power supply state; and C, detecting whether the power supply state of the vehicle meets the power supply requirement of operation of the fixed-frequency compressors under the current refrigeration requirement or not, if not, sending a power supply requirement signal for changing the variable-frequency voltage to a vehicle control system, and controlling the two fixed-frequency compressors to operate under the current power supply state when detecting that the power supply state meets the refrigeration requirement. According to the characteristics of power supply output of the fixed-frequency compressor and the vehicle power supply, the fixed-frequency compressor operates under the power supply condition of narrow-range voltage transformation and frequency conversion, so that theair conditioning unit adopting the fixed-frequency compressor can provide higher cooling capacity performance and comfort performance.

Description

technical field [0001] The invention belongs to the technical field of rail vehicle air conditioners, and in particular relates to a multi-stage refrigeration control method for a rail vehicle air conditioner unit. Background technique [0002] COP energy efficiency ratio refers to the ratio of the cooling capacity of the air conditioning unit to the input power (power consumption). For products with the same cooling capacity, the greater the energy efficiency ratio, the more electricity can be saved. In the industrial environment of energy saving and environmental protection, the improvement of COP is also the mainstream technical topic of rail transit air conditioning. [0003] In the prior art, the improvement of the energy efficiency ratio is often achieved by setting a frequency conversion compressor and supporting frequency conversion power supply components. But it led to an increase in cost. Contents of the invention [0004] The technical problem to be solved b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61D27/00
CPCB61D27/0072
Inventor 马秋香刘焕浩徐大勇闫英华张婷尹彩红杜睿
Owner 石家庄国祥运输设备有限公司
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