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Load control method and device of multi-compressor unit and air conditioner

A load control and multi-compressor technology, which is applied in the direction of control input related to air characteristics, heating and ventilation control system, space heating and ventilation control input, etc., can solve the problems of environmental impact and poor user experience, and reduce High temperature alarm, avoid shutdown without refrigeration, and improve user experience

Active Publication Date: 2019-05-28
GUANGDONG EUROKLIMAT AIR CONDITIONING & REFRIGERATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For multi-compressor system units, although the original cooling water system cannot meet the full load operation of the unit, it can meet the partial load operation
According to the traditional water temperature control, if the water temperature exceeds the operating range during the operation of the unit, all compressors of the unit will stop, and the unit will completely stop cooling, which will have a great impact on the use environment and poor user experience

Method used

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  • Load control method and device of multi-compressor unit and air conditioner
  • Load control method and device of multi-compressor unit and air conditioner
  • Load control method and device of multi-compressor unit and air conditioner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment provides a load control method for a multi-compressor unit, which is used for load control of a multi-compressor unit with a cooling water system, and can load a reasonable number of compressors within the cooling capacity of the cooling water, reducing cooling water If the system high temperature alarm causes the unit to shut down as a whole, it can ensure continuous cooling.

[0044] figure 1 It is a flow chart of the load control method for multi-compressor units provided in this embodiment. Such as figure 1 As shown, the load control method includes the following steps:

[0045] S11, acquiring the cooling water outlet temperature of the condenser and the return air temperature of the indoor unit in real time.

[0046] After the air conditioner is turned on in cooling or dehumidification mode, first turn on the water pump of the cooling water system and the indoor heat exchange fan to check whether the water flow, water pump, and fan are normal.

...

Embodiment 2

[0057] On the basis of the above-mentioned embodiments, this embodiment refines the judging method for loading or unloading the compressor, figure 2 It is a flow chart of the load control method of the multi-compressor unit provided in this embodiment, such as figure 2As shown, the load control method specifically includes the following steps:

[0058] S21, acquiring the outlet temperature of the cooling water of the condenser in real time and the return air temperature of the indoor unit periodically.

[0059] The purpose of obtaining the return air temperature periodically is to accurately determine the cooling demand and avoid excess or insufficient cooling capacity.

[0060] S22. If the outlet water temperature is within the start-up range and the return air temperature is greater than the set target temperature, start the first compressor.

[0061] S23. Calculate a first temperature difference between the return air temperature and the target temperature, and a change...

Embodiment 3

[0074] This embodiment provides a load control device for a multi-compressor unit, which is used to implement the load control method described in the above embodiments, has corresponding functional modules, solves the same technical problem, and achieves the same technical effect.

[0075] The load control device includes:

[0076] The first temperature sensor is used to obtain the outlet temperature of the cooling water of the condenser in real time.

[0077] The second temperature sensor is used to obtain the return air temperature of the indoor unit, and is specifically used to obtain the return air temperature periodically.

[0078] The initial start-up module is used to determine if the outlet water temperature is within the start-up range and the return air temperature is greater than the set target temperature, then start the first compressor.

[0079] A load judging module, configured to determine the number of compressors to be loaded or unloaded according to the re...

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Abstract

The invention discloses a load control method and device of a multi-compressor unit and an air conditioner. The load control method comprises the steps that the water outlet temperature of cooling water of a condenser and air returning temperature of an indoor unit are obtained in real time; if the water outlet temperature is within the starting-up range, and the air returning temperature is larger than the set target temperature, a first compressor is started; according to the difference value of the real-time water outlet temperature, the air returning temperature and the target temperature,the number of loading or deloading compressors can be determined; the water outlet temperature of the cooling water and the air returning temperature of the indoor unit are obtained, in combination with the set refrigeration target temperature, through analysis of the refrigeration need and the allowable load of the cooling water, the number of loading compressors is decided, or the number of thecorrespondingly deloading compressors is decided; under the condition that the cooling water temperature is high, within the cooling water capacity range, a certain number of compressors are allowedto work, the cooling water high temperature alarm can be reduced, the condition that all compressors are shut down and do not carry out refrigeration is avoided, and the user experience is improved.

Description

technical field [0001] The invention relates to the field of air conditioning, in particular to a load control method and device for a multi-compressor unit and an air conditioner. Background technique [0002] The condenser of multi-compressor systems such as central air conditioners usually has an auxiliary water cooling system. The traditional cooling water temperature control is equipped with an inlet water temperature sensor and an outlet water temperature sensor to specify the operating range of the inlet and outlet water temperature of the unit. If the operating range is exceeded, the unit will stop. . For multi-compressor system units, although the original cooling water system cannot meet the full load operation of the unit, it can meet the partial load operation. According to the traditional water temperature control, if the water temperature exceeds the operating range during the operation of the unit, all compressors of the unit will stop, and the unit will comp...

Claims

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Application Information

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IPC IPC(8): F24F11/89F24F11/64F24F11/86F24F110/10
Inventor 黄永炎杨正贤何湛洪喻志强
Owner GUANGDONG EUROKLIMAT AIR CONDITIONING & REFRIGERATION
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