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Multi-connected air conditioner indoor unit noise reduction method and device as well as multi-connected air conditioner system

A multi-connected air conditioner and internal unit technology, which is applied in air conditioning systems, heating and ventilation control systems, heating and ventilation safety systems, etc., can solve problems such as insufficient refrigerant subcooling, loud refrigerant liquid flow, etc.

Active Publication Date: 2021-05-18
NINGBO AUX ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the invention is that in the start-up stage of the compressor, the insufficient refrigerant subcooling degree causes the refrigerant to generate a large liquid flow sound when passing through the electronic expansion valve of the internal unit.

Method used

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  • Multi-connected air conditioner indoor unit noise reduction method and device as well as multi-connected air conditioner system
  • Multi-connected air conditioner indoor unit noise reduction method and device as well as multi-connected air conditioner system
  • Multi-connected air conditioner indoor unit noise reduction method and device as well as multi-connected air conditioner system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] This embodiment provides a noise reduction method for multi-connected air conditioners, such as image 3 shown, including steps:

[0055] S302 acquires a compressor startup command;

[0056] S304 According to the start-up load of the indoor unit, start the external fan at a speed not higher than the mid-range speed at the first predetermined time before the compressor is started; that is, the external fan is started at the first predetermined time earlier than the start of the compressor. Specifically, the value range of the first predetermined time is: 3-10s; preferably, the first predetermined time is 5s;

[0057] S306 According to the start-up load of the internal unit, start the electronic expansion valve of the internal unit at a second predetermined time after the start of the compressor. Compared with the start of the compressor, the electronic expansion valve of the internal unit is delayed for a second predetermined time to start.

[0058] In the multi-connec...

Embodiment 2

[0073] This embodiment provides a noise reduction method for multi-connected air conditioners, such as Figure 4 shown, including steps:

[0074] S402 acquires a compressor startup command;

[0075] S404 According to the start-up load of the internal unit, start the external fan at a speed not higher than the mid-range speed at the first predetermined time before the compressor is started; that is, the external fan is started at the first predetermined time earlier than the start of the compressor. Specifically, the value range of the first predetermined time is: 3-10s; preferably, the first predetermined time is 5s.

[0076] In the multi-connected air conditioning system, the outdoor fan is started at the first predetermined time before the compressor is started. Since the starting speed of the outdoor fan is not higher than the mid-range speed, the starting speed is smaller than that of the existing outdoor fan, that is, the starting speed of the outdoor fan In the first s...

Embodiment 3

[0089] This embodiment provides a noise reduction method for multi-connected air conditioners, such as Figure 5 shown, including steps:

[0090] S502 acquires a compressor startup command;

[0091] S506 According to the start-up load of the internal unit, start the electronic expansion valve of the internal unit at a second predetermined time after the start of the compressor. Compared with the start of the compressor, the electronic expansion valve of the internal unit is delayed for a second predetermined time to start.

[0092] In the multi-connected air-conditioning system, since the electronic expansion valve of the internal unit is started at the second predetermined time after the compressor is started, that is, the electronic expansion valve of the internal unit is delayed relative to the start of the compressor, so that the refrigerant in the electronic expansion valve of the internal unit can be activated in a short time. After the accumulation of refrigerant in fr...

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Abstract

The invention provides a multi-connected air conditioner indoor unit noise reduction method and device as well as a multi-connected air conditioner system. The technical problem that liquid flow sound is generated when a refrigerant flows through an indoor unit electronic expansion valve is solved. The noise reduction method comprises the steps: obtaining a compressor starting command; according to the starting load of an inner unit, starting an outer fan at the rotating speed not higher than the middle gear within the first preset time before the compressor is started; and / or, according to the starting load of the indoor unit, starting an indoor unit electronic expansion valve at the second preset time after the compressor is started. According to the noise reduction method disclosed by the invention, the supercooling degree of the refrigerant can be improved, and then liquid flow sound is reduced or even avoided.

Description

technical field [0001] The present invention relates to the technical field of air conditioners, in particular to a noise reduction method and device for multi-connected air-conditioning internal units and a multi-connected air-conditioning system. Background technique [0002] With the continuous improvement of people's living standards, air conditioners have become an essential household appliance for millions of households. People's expectations for air conditioning systems are not only good cooling and heating effects, but also a quiet environment. Therefore, the noise level of the internal unit of the air conditioner has become one of the important indicators for evaluating the comfort of the air conditioner. [0003] For multi-connected indoor units, electronic expansion valves are installed to achieve precise control of refrigerant flow while ensuring the pressure drop effect, improving user comfort. However, when the multi-connected air conditioner is started in th...

Claims

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Application Information

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IPC IPC(8): F24F13/24F24F11/61F24F11/64F24F11/84F24F11/86F24F11/871F24F3/00
CPCF24F13/24F24F11/871F24F11/86F24F11/84F24F11/64F24F11/61F24F3/00Y02B30/70
Inventor 刘永超刘合心张稳程相欣
Owner NINGBO AUX ELECTRIC