CN-122015247-A - Air supplementing pressure adjusting method based on multi-split air conditioner and related equipment

CN122015247ACN 122015247 ACN122015247 ACN 122015247ACN-122015247-A

Abstract

The application relates to the technical field of multi-split air conditioners, in particular to a method and related equipment for adjusting air supplementing pressure based on a multi-split air conditioner. The multi-split air conditioner comprises a compressor, a four-way valve, an external machine coil, an oil separator, an economizer expansion valve, a main board cooling, a liquid pipe stop valve and a sensor module, wherein the economizer is arranged between the main board cooling and the liquid pipe stop valve, a flow path of the economizer is divided into a main path and a branch path, the main path is connected with the main board cooling, the branch path is arranged between connecting pipelines of the economizer and the liquid pipe stop valve, the branch path is respectively connected with the economizer expansion valve and the economizer, the regulation method comprises the steps of calculating sensing data acquired by the sensor module to obtain air supplementing pressure, and regulating the economizer to the compressor according to the air supplementing pressure to obtain a stable state of an air supplementing port of the compressor. The application can realize accurate regulation and control of the pressure of the air supplementing, improves the adaptability to cold areas, ensures the safety and balances the energy efficiency.

Inventors

LI GUANGXING
WU CHENGSONG
YE SHUMAO
HOU YUQING
QU SIFAN

Assignees

广东恩博力电器有限公司
安徽恩博力电器有限公司

Dates

Publication Date: 20260512
Application Date: 20260123

Claims (10)

1. The air supplementing pressure adjusting method based on the multi-split air conditioner is characterized by comprising a compressor, a four-way valve, an outer machine coil, an oil separator, an economizer expansion valve, a main board cooling, a liquid pipe stop valve and a sensor module, wherein the compressor is connected with one end of the oil separator, the four-way valve is respectively connected with the outer machine coil and the other end of the oil separator, the economizer is arranged between the main board cooling and the liquid pipe stop valve, a flow path of the economizer is divided into a main path and a branch path, the main path is connected with the main board cooling, the branch path is arranged between connecting pipelines of the economizer and the liquid pipe stop valve, and the branch path is respectively connected with the economizer expansion valve and the economizer, and the adjusting method comprises the following steps: Calculating the sensing data acquired by the sensor module to obtain the air supplementing pressure; And carrying out refrigerant adjustment on the economizer to the compressor according to the air supplementing pressure to obtain the stable state of the air supplementing port of the compressor.
2. The method according to claim 1, wherein the calculating the sensor data obtained by the sensor module to obtain the air supply pressure includes the steps of: Acquiring condensing pressure, single internal machine evaporating pressure and single internal machine load through the sensor module; Calculating according to the single internal machine evaporation pressure and the single internal machine load to obtain equivalent evaporation pressure; Calculating the equivalent evaporation pressure and the condensation pressure to obtain a theoretical value of the air supplementing pressure; And correcting the theoretical value of the air supplementing pressure to obtain the air supplementing pressure.
3. The method of claim 2, wherein the calculating based on the single internal machine evaporation pressure and the single internal machine load comprises: ; Wherein, the Representing the said equivalent evaporation pressure, Representing the load of the single internal machine, And k represents the number of the internal machines in operation.
4. The method of claim 2, wherein the calculating the equivalent evaporation pressure and the condensing pressure comprises: ; Wherein, the Indicating the theoretical value of the pressure of the air supply, Which is indicative of the said condensation pressure, Representing the equivalent evaporation pressure.
5. The method according to claim 2, wherein said correcting said theoretical value of said air-make-up pressure to obtain said air-make-up pressure comprises the steps of Calculating the saturation temperature of the condensing pressure and the outlet temperature of the outer coil pipe to obtain main-path supercooling degree; Comparing the main road supercooling degree with a main road supercooling degree correction coefficient to obtain a supercooling degree correction value; comparing the main board temperature with the main board temperature correction coefficient to obtain a main board temperature correction value; and calculating according to the supercooling degree correction value, the main board temperature correction value and the air supplementing pressure theoretical value to obtain the air supplementing pressure.
6. The method of claim 2, further comprising the step of: When the air supplementing pressure is smaller than the lowest safety threshold value, correcting the air supplementing pressure according to the pressure value of the lowest safety threshold value to obtain corrected air supplementing pressure; comparing the corrected air supplementing pressure according to a physical property table to obtain a flash gas saturation temperature; when the saturated temperature of the flash gas is greater than or equal to a first minimum evaporation temperature threshold, obtaining the verified air supplementing pressure; When the outdoor environment temperature is less than or equal to a low temperature threshold and the duration exceeds a maximum time threshold, the air supplementing pressure is the minimum safety threshold, and the flash gas saturation temperature is greater than or equal to a second minimum evaporation temperature threshold; and the minimum safety threshold is dynamically adjusted according to the outdoor environment temperature and the cold zone control parameter library.
7. The method of claim 6, wherein said refrigerant adjusting said economizer to said compressor based on said make-up pressure results in a compressor make-up port steady state, comprising the steps of: The opening degree of the expansion valve of the economizer is regulated according to the air supplementing pressure, so that the real-time flash gas saturation temperature is obtained; when the real-time flash gas saturation temperature is in the evaporation temperature threshold value range, judging whether the air supplementing pressure is in a safety threshold value range or not; When the air supplementing pressure is in the safety threshold range, judging whether the defrosting temperature sensing bulb temperature is smaller than the frosting point temperature, the relative humidity is larger than or equal to the humidity threshold, the duration time of the coincidence condition is larger than the preset time threshold, defrosting if the conditions are met at the same time, and updating and calculating the equivalent evaporation pressure in real time if the conditions are not met; When the real-time flash gas saturation temperature is smaller than the minimum value of the evaporation temperature threshold interval, the air supplementing pressure is increased according to a first pressure value, when the real-time flash gas saturation temperature is larger than the maximum value of the evaporation temperature threshold interval, the air supplementing pressure is reduced according to a second pressure value, whether the regulated air supplementing pressure is in the safety threshold range is judged, if not, the air supplementing pressure is corrected to the safety threshold range by taking a value nearby.
8. The method of claim 6, further comprising, prior to said calculating the sensed data acquired by the sensor module, the steps of: The multi-split air conditioner is powered on for self-checking, judging whether the outdoor environment temperature is smaller than or equal to a first low-temperature threshold value or whether a cold zone control mode is manually started or not, and judging whether the outdoor environment temperature is smaller than or equal to a second low-temperature threshold value or not; loading the cold band control parameter library when any condition is met, and obtaining standby parameters in the cold band control parameter library; performing verification screening of pressure parameters, load or temperature parameters and cold zone control state parameters and internal machine running state screening on the standby parameters to obtain accurate standby parameters; The standby parameters comprise the lowest safety threshold, a main road supercooling degree correction coefficient, the first lowest evaporation temperature threshold, the second lowest evaporation temperature threshold and a main board temperature correction coefficient.
9. The utility model provides a conditioning system based on air supplementing pressure of many online air conditioner, its characterized in that, many online air conditioner includes compressor, cross valve, outer quick-witted coil pipe, oil separator, economic ware expansion valve, mainboard cooling, liquid pipe stop valve and sensor module, the compressor with one end of oil separator is connected, the cross valve respectively with outer quick-witted coil pipe with the other end of oil separator is connected, be provided with between the mainboard cooling with the liquid pipe stop valve the economic ware divide into main road and branch road in the flow path of economic ware, the main road with the mainboard cooling is connected, the branch road sets up between the connecting line of economic ware with liquid pipe stop valve, the branch road respectively with economic ware expansion valve with the economic ware is connected, conditioning system includes the following steps: The calculation module is used for calculating the sensing data acquired by the sensor module to acquire the air supplementing pressure; And the adjusting module is used for adjusting the refrigerant of the economizer to the compressor according to the air supplementing pressure to obtain the stable state of the air supplementing port of the compressor.
10. An electronic device comprising a memory storing a computer program and a processor implementing the method of any of claims 1 to 8 when the computer program is executed by the processor.

Description

Air supplementing pressure adjusting method based on multi-split air conditioner and related equipment Technical Field The application relates to the technical field of multi-split air conditioners, in particular to a method and related equipment for adjusting air supplementing pressure based on a multi-split air conditioner. Background At present, the air supplementing and enthalpy increasing technology becomes a core optimization scheme of air conditioning heat (especially in cold zone areas and low-temperature heating scenes), and has the advantages of low-temperature performance improvement, energy efficiency optimization, system stability enhancement, compressor protection and the like. In cold zone areas, the core contradiction of using the economizer for air supplement is that the first is parameter mismatch caused by extremely low temperature, the second is system fluctuation caused by frosting frequently, and the third is the problem of balance between safety and energy efficiency. The key defects of the air supplementing in the cold zone are low air supplementing pressure control precision, large frosting interference, poor low-temperature reliability, difficult energy efficiency balance and the like. For example, the traditional strategy of fixing the air supplementing pressure cannot be adapted to the dynamic change of the equivalent evaporation pressure of the cold-zone internal machine, the compression ratio is easy to be out of control or the heating quantity is easy to be insufficient, the traditional defrosting and air supplementing are independently controlled, the air supplementing parameters are easy to be suddenly changed before and after defrosting, the system oscillates, the air supplementing effect is insufficient at extremely low temperature, and the heating quantity is limited to be improved. In summary, the technical problems in the related art are to be improved. Disclosure of Invention The embodiment of the application mainly aims to provide a method and related equipment for adjusting the air supplementing pressure based on a multi-split air conditioner, which can realize accurate regulation and control of the air supplementing pressure, improve the suitability of the air supplementing pressure to cold areas, ensure safety and balance energy efficiency. In order to achieve the above object, an aspect of the embodiments of the present application provides a method for adjusting a pressure of air supplied to a multi-split air conditioner, the multi-split air conditioner including a compressor, a four-way valve, an external coil, an oil separator, an economizer expansion valve, a main board cooling, a liquid pipe stop valve, and a sensor module, wherein the compressor is connected to one end of the oil separator, the four-way valve is respectively connected to the external coil and the other end of the oil separator, the economizer is disposed between the main board cooling and the liquid pipe stop valve, a main path and a branch path are divided into a flow path of the economizer, the main path is connected to the main board cooling, the branch path is disposed between a connecting pipeline of the economizer and the liquid pipe stop valve, and the branch path is respectively connected to the economizer expansion valve and the economizer, the method comprises the following steps: Calculating the sensing data acquired by the sensor module to obtain the air supplementing pressure; And carrying out refrigerant adjustment on the economizer to the compressor according to the air supplementing pressure to obtain the stable state of the air supplementing port of the compressor. In some embodiments, the calculating the sensing data acquired by the sensor module to obtain the air supplementing pressure includes the following steps: Acquiring condensing pressure, single internal machine evaporating pressure and single internal machine load through the sensor module; Calculating according to the single internal machine evaporation pressure and the single internal machine load to obtain equivalent evaporation pressure; Calculating the equivalent evaporation pressure and the condensation pressure to obtain a theoretical value of the air supplementing pressure; And correcting the theoretical value of the air supplementing pressure to obtain the air supplementing pressure. In some embodiments, the calculating according to the single internal machine evaporation pressure and the single internal machine load includes: ; Wherein, the Representing the said equivalent evaporation pressure,Representing the load of the single internal machine,And k represents the number of the internal machines in operation. In some embodiments, the calculating the equivalent evaporation pressure and the condensing pressure comprises: ; Wherein, the Indicating the theoretical value of the pressure of the air supply,Which is indicative of the said condensation pressure,Representing the equivalent evaporation pressure.