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Method and device for calculating rotating speed of condenser fan in automotive air conditioning system

A technology of condensing fan speed, automotive air conditioning system, applied in vehicle parts, transportation and packaging, high-efficiency adjustment technology, etc., can solve problems such as energy waste and excess refrigeration, avoid energy waste, increase operating life, and improve control reliability. Effect

Active Publication Date: 2020-08-04
ZHENGZHOU YUTONG BUS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for calculating the rotational speed of the condensing fan in an automobile air-conditioning system, which is used to solve the problem of energy waste caused by excessive cooling when controlling the rotational speed of the condensing fan in the existing air-conditioning system. The present invention also provides an automobile air-conditioning system The condensing fan speed calculation device is used to solve the problem of energy waste caused by excessive cooling when controlling the condensing fan speed in the existing air conditioning system

Method used

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  • Method and device for calculating rotating speed of condenser fan in automotive air conditioning system
  • Method and device for calculating rotating speed of condenser fan in automotive air conditioning system
  • Method and device for calculating rotating speed of condenser fan in automotive air conditioning system

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Embodiment 1

[0027] Such as figure 1 In the single-compartment air-conditioning system shown, in order to control the speed of the condensing fan more accurately and stably, specifically, the consideration of the frequency of the compressor is added. In the specific calculation link, there are two implementation methods that can be used:

[0028] The first way: improve on the basis of the existing control method of the rotating speed of the condensing fan of the air conditioning system. The existing control method usually collects the temperature difference between the ambient temperature inside the vehicle and the required temperature inside the vehicle, and at the same time combines the external ambient temperature to obtain a control value, and controls the speed of the condensing fan according to the control value. On the basis of the control quantity obtained in the prior art, a control coefficient related to the compressor frequency f is added, that is, after considering the compress...

Embodiment 2

[0036] On the basis of Example 1 of the method for calculating the rotational speed of the condensing fan in the automotive air-conditioning system, this embodiment also considers the influence of the high pressure value of the air conditioner when calculating the rotational speed of the condensing fan. In the specific calculation link, there are two implementation methods that can be used:

[0037] The first way: on the basis of the control quantity finally obtained in the first way in Embodiment 1 of the calculation method for the speed of the condensing fan of the automobile air-conditioning system, the control quantity is multiplied by a control coefficient related to the high pressure value of the air conditioner, Control the condensation fan speed according to the multiplication result. The specific implementation method is: to normalize the high pressure value, for example, using P g / P max , where P g is the measured high pressure value of the air conditioner, P max...

Embodiment 3

[0043] On the basis of Embodiment 2 of the calculation method for the rotational speed of the condensing fan of the automobile air-conditioning system, this embodiment also considers the influence of the vehicle speed when calculating the rotational speed of the condensing fan. In the specific calculation link, there are two implementation methods that can be adopted:

[0044] The first way: on the basis of the control quantity finally obtained in the first way in the embodiment 2 of the calculation method of the condensing fan speed of the automobile air-conditioning system, the control quantity is multiplied by a control coefficient related to the vehicle speed, and according to the multiplication The result controls the condensing fan speed. The specific implementation method is: normalize the vehicle speed, because the rotating speed of the cooling fan is negatively correlated with the vehicle speed and positively correlated with the reciprocal of the vehicle speed, so the ...

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Abstract

The invention relates to a method and device for calculating a rotating speed of a condenser fan in an automotive air conditioning system. The method comprises the following steps of collecting at least an inside required temperature, an outside environment temperature, an inside environment temperature and a compressor frequency; and calculating a temperature difference according to the inside environment temperature and the inside required temperature, and controlling the rotating speed of the condenser fan at least according to the temperature difference, the outside environment temperatureand the compressor frequency, wherein the rotating speed of the condenser fan is positively correlated with the temperature difference, the outside environment temperature and the compressor frequency. The invention adjusts the rotating speed of the condenser fan according to the compressor frequency. When the compressor frequency is high, the rotating speed of the condenser fan is increased correspondingly to ensure the condensing effect. When the compressor frequency is low, the rotating speed of the condenser fan is reduced accordingly to save the operating energy consumption of the condenser fan and increase the operating life of the condenser fan while ensuring the condensing effect. Since the working condition of the compressor is fully considered, the control reliability of the condensing effect is effectively improved.

Description

technical field [0001] The invention relates to a method and device for calculating the rotating speed of a condensing fan of an automobile air-conditioning system, and belongs to the technical field of pure electric vehicles. Background technique [0002] As a device for adjusting temperature, the air conditioning system is widely used. The traditional air conditioning single cycle system is mainly designed for a single space, such as a room, a car, etc. Such as figure 1 Shown is the structural schematic diagram of the existing air conditioning system, figure 1 The air-conditioning system includes a compressor, the outlet of the compressor is connected to the inlet of the air-conditioning condenser through a high-pressure pressure sensor or switch, the outlet of the air-conditioning condenser is connected to the air-conditioning evaporator through a regulating valve, and the outlet of the air-conditioning evaporator is separated by gas-liquid The compressor, low-pressure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D27/00B60H1/00
CPCF04D27/004B60H1/00735B60H1/00764B60H1/00828Y02T10/88
Inventor 姜友爱
Owner ZHENGZHOU YUTONG BUS CO LTD
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