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Shutdown differential pressure balance control method, device, air conditioner and computer-readable storage medium

A technology of balance control and storage medium, applied in heating and ventilation control system, control input involving air characteristics, space heating and ventilation control input, etc. , to achieve the effect of stable differential pressure balance control, avoiding the risk of liquid backflow, and reducing product cost

Active Publication Date: 2022-04-22
NINGBO AUX ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem solved by the present invention is that in the prior art, after the multi-line is shut down, the pressure difference is usually balanced by opening the electronic expansion valve. can not play the role of improving the pressure difference

Method used

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  • Shutdown differential pressure balance control method, device, air conditioner and computer-readable storage medium
  • Shutdown differential pressure balance control method, device, air conditioner and computer-readable storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] This embodiment provides a shutdown pressure differential balance control method for air conditioners, such as figure 2 As shown, after the air conditioner stops, the following controls are performed:

[0048] Detect and calculate the return air superheat T1 of the compressor 1, adjust the opening of the air conditioner external unit valve 13 and / or the internal unit valve according to the return air superheat T1, balance the high and low pressure difference of the air conditioner, and the return air The formula for calculating superheat T1 is: T1=T-T2, where T is the return air temperature of compressor 1, and T2 is the low-pressure saturated steam temperature corresponding to the low-pressure return air pressure of the compressor.

[0049] By detecting the return air superheat T1 of the compressor 1 after the shutdown, the evaporation of the refrigerant in the system can be determined, and the opening of the external unit valve 13 and / or the internal unit valve can b...

Embodiment 2

[0091] This embodiment discloses a shutdown pressure differential balance control device, which is used to implement the shutdown pressure differential balance control method described in Embodiment 1.

[0092] The shutdown differential pressure balance control device includes:

[0093] A temperature acquisition module, the temperature acquisition module is at least used to detect the indoor ambient temperature Tai, the outdoor ambient temperature Tao, and the return air temperature T of the compressor; in some embodiments, the temperature acquisition module is a temperature sensing package or a temperature sensor;

[0094] A pressure acquisition module, at least used to detect the low-pressure return air pressure of the compressor;

[0095] The valve body control module is used to adjust the opening degree of the external machine valve and / or the internal machine valve according to the compressor return air superheat T1 and / or the ambient temperature difference ΔT.

[0096] ...

Embodiment 3

[0098] This embodiment discloses an air conditioner, and the air conditioner includes the shutdown pressure difference balance control device described in Embodiment 2.

[0099] For the air conditioner disclosed in this embodiment, it includes a computer-readable storage medium and a processor storing a computer program. When the computer program is read and run by the processor, a Shutdown differential pressure balance control method.

[0100] The air conditioner has the same advantages as that of the shutdown pressure difference balance control method described in Embodiment 1 over the prior art, and will not be repeated here.

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Abstract

The invention provides a pressure difference balance control method, device, air conditioner and computer readable storage medium. The control method includes: detecting and calculating the return air superheat T1 of the compressor, and adjusting the external temperature of the air conditioner according to the return air superheat T1. The opening degree of the machine valve and / or the internal machine valve balances the high and low pressure difference of the air conditioner. The calculation formula of the return air superheat T1 is: T1=T-T2, where T is the return air temperature of the compressor, and T2 is The low-pressure saturated steam temperature corresponding to the low-pressure return air pressure of the compressor. The invention adjusts the opening of the expansion valve of the internal unit and / or the expansion valve of the external unit according to the degree of superheat of the return air, and realizes the balance of the differential pressure under the condition that no liquid return occurs in the compressor. The temperature difference between the indoor and outdoor environments can finely control the opening of the expansion valve of the indoor unit and / or the opening of the expansion valve of the outdoor unit. On the basis of reducing product cost.

Description

technical field [0001] The present invention relates to the field of air conditioners, in particular, to a shutdown pressure difference balance control method and device, an air conditioner and a computer-readable storage medium. Background technique [0002] Multi-split is a type of central air conditioner, commonly known as "one-to-many", which means that one outdoor unit is connected to two or more indoor units through piping. The outdoor side adopts air-cooled heat exchange, and the indoor side uses direct evaporation Thermal form of primary refrigerant air conditioning system. Multi-connected systems are currently being increasingly widely used in small and medium-sized buildings and some public buildings. The multi-connector integrates multiple high-tech technologies, such as one drag multi-technology, intelligent control technology, multiple health technology, energy-saving technology and network control technology, to meet consumers' requirements for comfort and con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/30F24F11/61F24F11/64F24F11/65F24F11/84F24F11/88F24F110/10F24F110/12F24F140/20
CPCF24F11/30F24F11/61F24F11/64F24F11/65F24F11/84F24F11/88F24F2110/10F24F2110/12F24F2140/20
Inventor 吴海波李兆东郝明刘合心
Owner NINGBO AUX ELECTRIC