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Air conditioning system evaporation temperature control method and device and air conditioning system

A technology of evaporating temperature and air conditioning system, which is applied in heating and ventilation control system, heating and ventilation safety system, heating mode, etc., and can solve the problems of insufficient output of compressor capacity and large pressure loss of pipelines, etc.

Active Publication Date: 2019-06-07
天津欧科环境设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method can meet the needs of each indoor unit when the connecting pipe is short. When the connecting pipe is long, the pressure loss of the pipeline is relatively large, and the capacity output of the compressor is often insufficient.

Method used

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  • Air conditioning system evaporation temperature control method and device and air conditioning system
  • Air conditioning system evaporation temperature control method and device and air conditioning system
  • Air conditioning system evaporation temperature control method and device and air conditioning system

Examples

Experimental program
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Effect test

Embodiment 1

[0049] figure 1 It is a flow chart of a method for controlling the evaporation temperature of an air-conditioning system provided in Embodiment 1 of the present invention. This embodiment is applicable to an air-conditioning system for controlling the evaporation temperature. The air-conditioning system usually includes an outdoor unit and a plurality of indoor units, and each indoor unit is connected to the outdoor unit through a connecting pipe. The system evaporating temperature control device can be implemented, the device can be realized by software and / or hardware, and the device can be integrated in the air conditioning system. see figure 1 , the method of the embodiment of the present invention specifically includes the following steps:

[0050] S110. Obtain the actual evaporation temperature of the liquid refrigerant in the gas-liquid separator in the outdoor unit.

[0051] Optionally, obtaining the actual evaporation temperature of the liquid refrigerant in the ga...

Embodiment 2

[0063] This embodiment is on the basis of above-mentioned technical scheme, carries out specificization and optimization, figure 2 It is a flow chart for judging whether the target evaporation temperature needs to be corrected according to the operating parameters of each indoor unit provided by Embodiment 2 of the present invention, as shown in figure 2 As shown, it specifically includes the following steps:

[0064] S141. Calculate a first temperature deviation of each indoor unit, where the first temperature deviation is a difference between a return air temperature and a set temperature.

[0065] Wherein, the collected operating parameters of the indoor unit include return air temperature, outlet air temperature and set temperature. The return air temperature mentioned here refers to the temperature at the air return port of the indoor unit, the outlet air temperature refers to the temperature at the air outlet of the indoor unit, and the set temperature refers to the t...

Embodiment 3

[0077] Figure 4 It is a structural diagram of an evaporation temperature control device for an air-conditioning system provided in Embodiment 3 of the present invention. The air-conditioning system includes an outdoor unit and multiple indoor units. Each indoor unit is connected to the outdoor unit through a connecting pipe. The device includes: the actual evaporation temperature Acquisition module 110, compressor operation frequency adjustment module 120, operation parameter acquisition module 130, first judgment module 140, target evaporation temperature correction module 150 and target evaporation temperature maintenance module 160;

[0078] An actual evaporation temperature acquisition module 110, configured to acquire the actual evaporation temperature of the liquid refrigerant in the gas-liquid separator in the outdoor unit;

[0079] A compressor operating frequency adjustment module 120, configured to adjust the operating frequency of the compressor in the outdoor unit...

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Abstract

The invention discloses an air conditioning system evaporation temperature control method and device and an air conditioning system. The method comprises the following steps that the actual evaporation temperature of a liquid refrigerant in a gas-liquid separator in an outdoor unit is acquired, the operation frequency of a compressor in the outdoor unit is adjusted according to the target evaporation temperature and the actual evaporation temperature, and when the actual evaporation temperature reaches the target evaporation temperature, operation parameters of each indoor unit are collected,and whether the target evaporation temperature needs to be corrected or not is judged according to the operation parameters of each the indoor unit, and if the target evaporation temperature needs tobe corrected, whether the target evaporation temperature needs to be corrected or not is judged according to the operation parameters of all the indoor units, and the target evaporation temperature iscorrected according to a first preset rule; and if not, the target evaporation temperature is kept to be unchanged, and the steps are repeated, so that the operating frequency of the compressor meetsthe capacity requirement of each indoor unit. According to the technical scheme, the operation frequency of the compressor can meet the capacity requirement of each indoor unit in the air conditioning system.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of air conditioning, and in particular, to a method and device for controlling evaporation temperature of an air conditioning system, and an air conditioning system. Background technique [0002] The outdoor unit and the indoor unit of the multi-connected long-pipe system are installed separately. Some of the connecting pipes of multiple indoor units are long and some are short. The longest connecting pipe can reach more than 100 meters. The refrigerant flows in the connecting pipe. , resulting in a pressure loss. However, the cooling effect of the indoor unit is closely related to the evaporation temperature of the refrigerant in the indoor unit. How to effectively control the evaporation temperature of the indoor unit has become an important problem that must be solved in the multi-connected long-pipe system. [0003] A conventional method is to aggregate the cooling capacity require...

Claims

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Application Information

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IPC IPC(8): F24F11/64F24F11/86F24F140/20
Inventor 李世刚罗明燕杨正贤叶利杞吴永训余张波谭永程陈千驹
Owner 天津欧科环境设备有限公司
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