A control method for an air conditioning system

A control method and technology for an air-conditioning system, which are applied in the direction of noise suppression, heating and ventilation control systems, heating and ventilation safety systems, etc., can solve problems such as throttling noise of electronic expansion valves, and achieve elimination of throttling noise and liquid flow. Effects of sound production conditions

Active Publication Date: 2020-07-31
NINGBO AUX ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention aims to propose a control method for an air-conditioning system to solve the problem of obvious throttling noise at the electronic expansion valve when the air-conditioner is heating in high-temperature conditions

Method used

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  • A control method for an air conditioning system

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Embodiment 1

[0030] The invention provides a control method for an air conditioning system, which combines figure 1 As shown, wherein the control method of the air-conditioning system is realized based on an inverter air-conditioning system, the inverter air-conditioning system is designed with a low-pressure pressure sensor on its return air low-pressure pipeline, which is used to detect the real-time low-pressure pressure value of the system, that is, the condensation pressure Pd; A high-pressure pressure sensor is designed on the exhaust high-pressure pipeline to detect the real-time high-pressure pressure value of the system, that is, the evaporation pressure Ps; a temperature-sensing package is installed on the inner plate to detect the temperature Tem of the inner plate on the inner plate.

[0031] The frequency conversion air conditioning system includes a compressor, and a temperature sensing package is designed on the discharge port of the compressor to detect the discharge tempera...

Embodiment 2

[0048] The difference between the control method of the air-conditioning system as described in the first embodiment above is that the step S300 includes specific steps:

[0049] S310. When the first preset condition is met, monitor system parameters to determine whether there is a protection limit;

[0050] S320. When the system parameters have no protection limit, the frequency of the compressor is increased according to the fixed frequency;

[0051] S330. Detecting the condensing pressure Pd and the evaporating pressure Ps during the frequency up process, comparing the pressure ratio P1 with a preset second reference pressure ratio P3, and judging whether a second preset condition is met.

[0052]Wherein, in step S310, the monitored system parameters include the discharge temperature Td of the compressor, the temperature Tem of the inner disk, and the frequency value H of the current operation of the electronic expansion valve;

[0053] In the controller, the first referen...

Embodiment 3

[0056] As the control method of the air conditioning system described in the second embodiment above, the difference of this embodiment is that the first reference temperature T1 is 90°C, and the second reference temperature T2 is 48°C; the maximum allowable frequency value Hd of the system is 90Hz; When Tem<48°C, Td<90°C, and Ph<90Hz, it meets the requirement of frequency increase of the compressor and ensures that there are no protection limits for various parameters inside the system. The compressor can increase the flow rate of refrigerant through frequency increase, thereby increasing the electronic expansion valve. The pressure ratio of the high and low pressure sides eliminates throttling noise.

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Abstract

The invention provides a control method of an air conditioner system. The control method of the air conditioner system comprises the following steps that S100, the condensing pressure Pd on the systemhigh-pressure exhaust side and the evaporating pressure Ps on the system low-pressure suction side are detected; S200, the pressure ratio P1 of the condensing pressure Pd to the evaporating pressurePs is compared with a first preset reference pressure ratio P2, and whether a first preset condition is met or not is judged; S300, if the first preset condition is met, the frequency of a compressoris increased, in the frequency increasing process, the pressure ratio P1 is compared with a second preset reference pressure ratio P3, and whether a second preset condition is met or not is judged; and S400, if the second preset condition is met, the compressor stops frequency increasing, and the compressor runs in a current situation keeping manner. According to the control method, by adjusting the frequency of the compressor in a variable frequency air conditioner, a refrigerant passes through an expansion valve at a high speed, liquid flowing sound generation conditions are eliminated, andtherefore throttling noise is eliminated.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a control method for an air conditioning system. Background technique [0002] In order to speed up the cooling and heating speed of the air conditioner, most air conditioner manufacturers achieve rapid cooling or heating by controlling the rapid rise and fall of the frequency of the inverter compressor. However, when the inverter air conditioner with a cooling capacity of more than 10KW is heating under high-temperature conditions, due to the poor heat transfer effect of the high-pressure side, the high pressure is high. , the pressure ratio on both sides of the electronic expansion valve decreases, the flow rate decreases, and the gas-liquid two-phase refrigerant passes through the electronic expansion valve at a low speed, resulting in obvious throttling noise, which seriously affects the user experience; When heating, the system starts 30Hz heating operation, the hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/30F24F11/64F24F11/88F24F13/24
CPCF24F11/30F24F11/64F24F11/88F24F13/24
Inventor 汪云强侯丽峰秦宪赵攀闫博
Owner NINGBO AUX ELECTRIC
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