CN114484738B - Control method and device for preventing liquid accumulation of air conditioner and air conditioner - Google Patents
Control method and device for preventing liquid accumulation of air conditioner and air conditioner Download PDFInfo
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- CN114484738B CN114484738B CN202210028499.1A CN202210028499A CN114484738B CN 114484738 B CN114484738 B CN 114484738B CN 202210028499 A CN202210028499 A CN 202210028499A CN 114484738 B CN114484738 B CN 114484738B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention discloses an anti-hydrops control method and device for an air conditioner and the air conditioner, and relates to the technical field of air conditioners, wherein the anti-hydrops control method for the air conditioner comprises the following steps: detecting the low pressure, supercooling degree and defrosting temperature of each outdoor unit; judging whether refrigerant accumulation occurs in each outdoor unit based on the low pressure, the supercooling degree and the defrosting temperature; and performing liquid accumulation removal control on the target outdoor unit with the refrigerant accumulation. The invention improves the accuracy of detecting the accumulated liquid of the outdoor unit, simultaneously carries out automatic accumulated liquid removing control on the outdoor unit generating the accumulated liquid of the refrigerant, avoids the deficiency of the circulating refrigerant of an air conditioning system, ensures the running reliability of the air conditioning unit and improves the use comfort of the air conditioner.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an anti-effusion control method and device for an air conditioner and the air conditioner.
Background
At present, air conditioners are increasingly used in large public places, such as business offices or stadiums, and in order to make the air conditioner capacity as large as possible, a plurality of outdoor units are generally connected in parallel to each indoor unit through the same connecting pipe. In actual operation, corresponding cold energy is output between the outdoor units according to a specific distribution mode according to different loads of the indoor units. However, due to the design difference of different outdoor units, parameters such as pressure, exhaust and the like of the unit have certain difference under the same output load. Especially, when the pressure states are different, the circulation speeds of the system refrigerants in the outdoor units are different, and in the outdoor units with large pressure differences, the refrigerant flow speed is high, but in the outdoor units with small pressure differences, the refrigerant flow speed is low, so that the refrigerant is easily accumulated in the outdoor units with low refrigerant flow speeds, the circulating refrigerant of the air conditioning system is insufficient, and the use comfort is affected.
Disclosure of Invention
In order to solve the problems, the invention provides an anti-effusion control method and device for an air conditioner and the air conditioner, which improve the accuracy of detecting effusion of an outdoor unit, and simultaneously perform automatic effusion removal control on the outdoor unit generating refrigerant accumulation, avoid the defect of circulating refrigerant of an air conditioning system, ensure the operation reliability of an air conditioning unit and improve the use comfort of the air conditioner.
According to an embodiment of the present invention, in one aspect, there is provided an anti-liquid accumulation control method for an air conditioner, including: detecting the low pressure, supercooling degree and defrosting temperature of each outdoor unit; judging whether refrigerant accumulation occurs in each outdoor unit based on the low pressure, the supercooling degree and the defrosting temperature; and performing liquid accumulation removal control on the target outdoor unit generating the refrigerant accumulation.
By adopting the technical scheme, whether the refrigerant accumulation exists in each outdoor unit or not is judged based on the linkage of the low pressure, the supercooling degree and the defrosting temperature of each outdoor unit, the accuracy of liquid accumulation detection is improved, meanwhile, the automatic liquid accumulation removal control is carried out on the outdoor unit generating the refrigerant accumulation, the defect that the circulating refrigerant of an air conditioning system is insufficient is avoided, the running reliability of an air conditioning unit is ensured, and the use comfort of an air conditioner is improved.
Preferably, the step of determining whether refrigerant accumulation occurs in each outdoor unit based on the low pressure, the supercooling degree, and the defrosting temperature includes: calculating an average low pressure based on the low pressure of each of the outdoor units; judging whether the low pressure of each outdoor unit is larger than the average low pressure, and screening out a first target outdoor unit with the low pressure larger than the average low pressure; and judging whether the refrigerant accumulation occurs in the first target outdoor unit or not based on the supercooling degree and the defrosting temperature.
By adopting the technical scheme, the first target outdoor unit with the low pressure larger than the average low pressure is screened, the outdoor unit possibly with effusion can be preliminarily screened from a plurality of outdoor units, the judging range is reduced, and a reliable basis is provided for judging the refrigerant accumulation.
Preferably, the step of determining whether the refrigerant accumulation occurs in the first target outdoor unit based on the supercooling degree and the defrosting temperature includes: judging whether the supercooling degree of each first target outdoor unit is larger than or equal to a first preset temperature, and screening a second target outdoor unit with the supercooling degree larger than or equal to the first preset temperature from the first target outdoor units; and judging whether refrigerant accumulation occurs in the second target outdoor unit based on the defrosting temperature.
By adopting the technical scheme, the second target outdoor unit with the supercooling degree larger than or equal to the first preset temperature is screened out from the first target outdoor units, so that the outdoor units possibly with refrigerant accumulation can be further screened out, the judging range is further reduced, and the refrigerant accumulation judging efficiency is improved.
Preferably, the step of determining whether the second target outdoor unit has refrigerant accumulation based on the defrosting temperature includes: detecting the current outdoor environment temperature, and calculating the temperature difference value between the defrosting temperature of each second target outdoor unit and the outdoor environment temperature; and determining the outdoor unit with the temperature difference less than or equal to a second preset temperature in the second target outdoor unit as the target outdoor unit with the refrigerant accumulation.
By adopting the technical scheme, the outdoor unit which simultaneously meets the conditions that the low pressure is larger than the average low pressure, the supercooling degree is larger than the first preset temperature and the difference between the defrosting temperature and the outdoor environment temperature is smaller than or equal to the second preset temperature is determined as the target outdoor unit with refrigerant accumulation, so that multi-parameter linkage judgment on the refrigerant accumulation of the outdoor unit is realized, and the judgment accuracy is improved.
Preferably, the step of performing liquid accumulation removal control on the target outdoor unit in which the refrigerant accumulation occurs includes: and controlling the frequency of the compressor of the target outdoor unit to increase the preset frequency so as to enable the refrigerant stored in the target outdoor unit to flow out.
By adopting the technical scheme, the outdoor unit with the refrigerant effusion is controlled to improve the operation frequency of the compressor, so that the internal pressure difference of the target outdoor unit can be increased, the refrigerant accumulated in the target outdoor unit flows into the main circulation system, the effusion in the target outdoor unit is removed, the normal operation of the air conditioner is ensured, and the use comfort is improved.
Preferably, the value range of the first preset temperature is 8-12 ℃, and the value range of the second preset temperature is 1-3 ℃.
By adopting the technical scheme, the first preset temperature is set to 8-12 ℃, so that the abnormal outdoor unit with excessive supercooling degree can be screened out, and the accuracy of refrigerant accumulation judgment is prompted; by setting the second preset temperature to 1-3 ℃, it can be judged whether the current defrosting temperature is close to the outdoor environment temperature, and further whether the effusion is generated in the condenser or not can be judged.
Preferably, the preset frequency is 5% -15% of the current running frequency of the compressor.
Through adopting above-mentioned technical scheme, promote compressor operating frequency according to the proportion, can effectively promote the unit internal pressure of off-premises station, can not cause great influence to the whole output of air conditioner simultaneously, promoted the stability and the reliability of air conditioner operation.
According to an embodiment of the present invention, there is provided an anti-liquid accumulation control device for an air conditioner, including: the detection module is used for respectively detecting the low pressure, the supercooling degree and the defrosting temperature of each outdoor unit; the judging module is used for judging whether refrigerant accumulation occurs in each outdoor unit or not based on the low pressure, the supercooling degree and the defrosting temperature; and the control module is used for controlling the liquid accumulation removal of the target outdoor unit generating the refrigerant accumulation.
According to an embodiment of the present invention, there is provided an air conditioner including a computer readable storage medium storing a computer program and a processor, the computer program implementing the method according to any one of the first aspects when read and executed by the processor.
According to an embodiment of the present invention, there is provided in a further aspect a computer readable storage medium storing a computer program which, when read and executed by a processor, implements a method according to any one of the first aspects.
The invention has the following beneficial effects: whether the refrigerant accumulation exists in each outdoor unit or not is judged through linkage based on three parameters of low pressure, supercooling degree and defrosting temperature of each outdoor unit, accuracy of detecting the accumulated liquid of the outdoor units is improved, meanwhile, automatic accumulated liquid removing control is conducted on the outdoor units generating the accumulated liquid of the refrigerant, the defect that an air conditioning system circulates the refrigerant is avoided, running reliability of an air conditioning unit is guaranteed, and using comfort of the air conditioner is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present invention, should fall within the ambit of the technical disclosure.
FIG. 1 is a flow chart of an anti-liquid accumulation control method of an air conditioner;
fig. 2 is a schematic structural diagram of an anti-liquid accumulation control device for an air conditioner according to the present invention.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
The embodiment provides a method for controlling anti-dropsy of an air conditioner, which can be applied to a controller of a multi-connected air conditioner, wherein the multi-connected air conditioner can comprise a plurality of outdoor units which are arranged in parallel, and the method mainly comprises the following steps of S102-S106, referring to a flow chart of the method for controlling anti-dropsy of the air conditioner shown in FIG. 1:
step S102: and detecting the low pressure, supercooling degree and defrosting temperature of each outdoor unit.
Detecting the low pressure of each outdoor unit, detecting the high pressure saturation temperature of the compressor and the outlet pipe temperature of the condenser of each outdoor unit, and calculating the difference between the high pressure saturation temperature and the outlet pipe temperature of the condenser (namely the temperature of the refrigerating liquid pipe of the outdoor unit) to obtain the supercooling degree of each outdoor unit; defrosting temperature of each outdoor unit is detected respectively by arranging a defrosting temperature sensing bulb based on a branch circuit at the bottom of a condenser of each outdoor unit.
Step S104: and judging whether refrigerant accumulation occurs in each outdoor unit based on the low pressure, the supercooling degree and the defrosting temperature.
Normally, a plurality of outdoor units are connected in parallel and commonly controlled, in theory, the low pressure of each outdoor unit should be approximately the same, and if an outdoor unit with the pressure being obviously higher than other low pressure exists, the outdoor unit may have refrigerant accumulation; in addition, when the outdoor units generate effusion, the refrigerant can be accumulated at the bottom of the condenser, so that the defrosting temperature is close to the outdoor environment temperature, and the comprehensive linkage judgment is carried out according to the low pressure, the supercooling degree and the defrosting temperature of each outdoor unit, so that whether the refrigerant accumulation is generated by each outdoor unit can be accurately detected.
Step S106: and performing liquid accumulation removal control on the target outdoor unit with the refrigerant accumulation.
When the refrigerant accumulation occurs in the outdoor unit, the outdoor unit generating the refrigerant accumulation is marked as a target outdoor unit, and the compressor of the target outdoor unit is controlled to remove the accumulated liquid in the target outdoor unit, so that the normal operation of the target outdoor unit is prevented from being influenced.
According to the air conditioner anti-effusion control method provided by the embodiment, whether the refrigerant accumulation exists in each outdoor unit is judged through linkage based on the low pressure, the supercooling degree and the defrosting temperature of each outdoor unit, so that the accuracy of effusion detection is improved, meanwhile, automatic effusion removal control is performed on the outdoor unit generating the refrigerant accumulation, the defect of the circulating refrigerant of an air conditioning system is avoided, the running reliability of an air conditioning unit is guaranteed, and the use comfort of an air conditioner is improved.
In one possible implementation manner, the present embodiment provides an implementation manner of determining whether refrigerant accumulation occurs in each outdoor unit based on the low pressure, the supercooling degree and the defrosting temperature, and may be specifically performed with reference to the following steps (1) to (3):
step (1): the average low pressure is calculated based on the low pressure of each outdoor unit.
And calculating an accumulated value of the low-pressure of each outdoor unit, and dividing the accumulated value by the number of the outdoor units to obtain the average low-pressure.
Step (2): and judging whether the low pressure of each outdoor unit is larger than the average low pressure, and screening out a first target outdoor unit with the low pressure larger than the average low pressure.
Comparing the calculated average low pressure with the low pressure of each outdoor unit one by one, judging whether the low pressure of each outdoor unit is larger than the average low pressure, and if the outdoor unit with the low pressure larger than the average low pressure exists, marking the outdoor unit as a first target outdoor unit.
Because the pressures of the outdoor units connected in parallel are close to each other when the air conditioner operates normally, the first target outdoor unit with the low pressure larger than the average low pressure is selected through screening, the outdoor units possibly with effusion can be initially selected from the plurality of outdoor units, the judging range is reduced, and a reliable basis is provided for judging the accumulation of the refrigerant.
Step (3): and judging whether the refrigerant accumulation occurs in the first target outdoor unit or not based on the supercooling degree and the defrosting temperature.
Judging whether the supercooling degree of each first target outdoor unit is larger than or equal to a first preset temperature, and screening a second target outdoor unit with the supercooling degree larger than or equal to the first preset temperature from the first target outdoor units; and judging whether the refrigerant accumulation occurs in the second target outdoor unit based on the defrosting temperature.
The outdoor unit with supercooling degree greater than or equal to the first preset temperature in the first target outdoor unit is marked as a second target outdoor unit, and the supercooling degree of each outdoor unit is in a lower temperature range when the air conditioner is in normal operation, and if the supercooling degree of one outdoor unit is seriously greater, the outdoor unit may have refrigerant accumulation.
The second target outdoor unit with the supercooling degree larger than or equal to the first preset temperature is screened out from the first target outdoor units, so that the outdoor units possibly with refrigerant accumulation can be further screened out, the judging range is further reduced, and the refrigerant accumulation judging efficiency is improved.
In a possible embodiment, the value of the first preset temperature may be 8 to 12 ℃, and preferably the value is 8 ℃. When the air conditioner is in normal operation, the supercooling degree of the outdoor unit is usually 3-5 ℃, and the abnormal outdoor unit with excessive supercooling degree can be screened out by setting the first preset temperature to 8-12 ℃, so that the accuracy of refrigerant accumulation judgment is prompted.
In one possible implementation manner, the present embodiment provides a specific implementation manner of determining whether the second target outdoor unit generates the refrigerant accumulation based on the defrosting temperature: detecting the current outdoor environment temperature, and calculating the temperature difference between the defrosting temperature of each second target outdoor unit and the outdoor environment temperature; and determining the outdoor unit with the temperature difference less than or equal to a second preset temperature in the second target outdoor unit as the target outdoor unit with the refrigerant accumulation.
When the outdoor unit accumulates liquid, the refrigerant is accumulated at the bottom of the condenser, and the defrosting temperature sensing bag is generally arranged at a branch at the bottom of the condenser. When the condenser is in liquid accumulation, the refrigerant does not flow in the pipeline, after a period of time, the difference between the defrosting temperature and the outdoor environment temperature is small, and when the difference is serious, the difference is equivalent to the outdoor environment temperature, so that the refrigerant accumulation judgment can be performed by detecting the difference between the defrosting temperature and the outdoor environment temperature.
The outdoor unit which simultaneously meets the conditions that the low pressure is larger than the average low pressure, the supercooling degree is larger than the first preset temperature and the temperature difference between the defrosting temperature and the outdoor environment temperature is smaller than or equal to the second preset temperature is determined as the target outdoor unit with refrigerant accumulation, so that multi-parameter linkage judgment on the refrigerant accumulation of the outdoor unit is realized, and the judgment accuracy is improved.
In a specific embodiment, the second preset temperature may have a value ranging from 1 to 3 ℃, and preferably has a value of 2 ℃. By setting the second preset temperature to 1-3 ℃, it can be judged whether the current defrosting temperature is close to the outdoor environment temperature, and further whether the effusion is generated in the condenser or not can be judged. The preset frequency is related to the current operating frequency of the compressor.
In one possible implementation manner, the present embodiment provides a specific implementation manner of performing liquid accumulation removal control on the target outdoor unit where the refrigerant accumulation occurs: the compressor frequency of the target outdoor unit is controlled to be increased by a preset frequency so that the refrigerant stored in the target outdoor unit flows out. The operation frequency of the compressor is improved by controlling the outdoor unit with the refrigerant liquid accumulation, so that the internal pressure difference of the target outdoor unit can be increased, the refrigerant accumulated in the target outdoor unit flows into the main circulation system, the liquid accumulation in the target outdoor unit is removed, the normal operation of the air conditioner is ensured, and the use comfort is improved.
In a possible implementation manner, the preset frequency is 5% to 15% of the current operating frequency of the compressor, and the preferred value is 10% of the current operating frequency. Through promoting compressor operating frequency in proportion, can effectively promote the unit internal pressure of off-premises station, can not cause great influence to the whole output of air conditioner simultaneously, promote the stability and the reliability of air conditioner operation.
According to the air conditioner anti-hydrops control method provided by the embodiment, whether the outdoor unit is hydrops is judged through linkage judgment of the low pressure, the supercooling degree and the defrosting temperature of the outdoor unit, so that the hydrops judgment accuracy is greatly improved; meanwhile, the accumulated liquid of the outdoor unit is accurately and effectively identified, and the accumulated liquid is pertinently regulated, so that the running reliability and the use comfort of the unit can be effectively ensured.
Corresponding to the method for controlling anti-dropsy of the air conditioner provided by the above embodiment, the embodiment of the present invention provides an example of anti-dropsy control of a multi-connected air conditioner by applying the method for controlling anti-dropsy of the air conditioner, which can be specifically executed with reference to the following steps 1 to 5:
step 1, after the multi-connected air conditioner operates stably, detecting the low pressure P of each outdoor unit si Wherein i is the external serial number, i=1, 2, 3 …
Under normal conditions, a plurality of outdoor units are connected in parallel and controlled together, the low pressure is about the same in theory, and if the low pressure of one outdoor unit is obviously higher than that of other outdoor units, liquid accumulation can exist in the outdoor unit. Calculating average low pressure P of each outdoor unit average And one by one with each outdoor unit low pressure P si Comparing and judging P si Whether or not it is greater than P average If yes, the supercooling degree judgment in the step 2 is carried out, and if not, the current operation is kept.
And 2, detecting the supercooling degree delta T of the outdoor unit, namely the high-pressure temperature Tg-cool-out temperature Tc (high-pressure saturation temperature) of the outdoor unit and the delta T=Tg-Tc (condenser outlet pipe temperature or outdoor unit refrigerating fluid pipe temperature) aiming at the outdoor unit with higher low-pressure detected in the step 1, judging whether the delta T is more than or equal to 8 ℃, if so, judging the defrosting temperature in the step 3, and if not, keeping the current operation.
Normally, the supercooling degree of the outdoor unit is controlled to be 3-5 ℃, and if the supercooling degree of one outdoor unit is seriously larger (more than 8 ℃), liquid accumulation can exist in the outdoor unit.
And 3, detecting the defrosting temperature Tdef of the outdoor unit detected in the step 2, comparing the defrosting temperature Tdef with the ambient temperature Tao, and if the temperature Tdef-Tao is less than or equal to 2 ℃, confirming that the outdoor unit stores the refrigerant, and performing adjustment operation, otherwise, keeping the current operation.
When the outdoor unit accumulates liquid, the refrigerant is accumulated at the bottom of the condenser, and the defrosting temperature sensing bag is generally arranged at a branch at the bottom of the condenser. When the condenser is in liquid accumulation, the refrigerant does not flow in the pipeline, and after a period of time, the difference between the tube temperature (namely the defrosting temperature) detected by the defrosting temperature sensing bag and the outdoor ring temperature is small, and when the difference is serious, the difference is equivalent to the outdoor ring temperature, so that liquid accumulation judgment can be carried out by detecting the difference between the defrosting temperature and the outdoor environment temperature.
And 4, aiming at the outdoor unit, the frequency of the compressor is proportionally increased (preferably 10 percent), so that the internal pressure of the unit can be effectively increased, and the whole output is not greatly influenced.
And 5, after the operation is stable, returning to the execution of the step 1, and re-entering the low-pressure detection.
Corresponding to the method for controlling the anti-effusion of the air conditioner provided by the above embodiment, the embodiment of the invention provides an anti-effusion control device of an air conditioner, which can be applied to a multi-connected air conditioner, referring to a schematic structural diagram of the anti-effusion control device of the air conditioner shown in fig. 2, and the device comprises the following modules:
the detection module 21 is configured to detect the low pressure, the supercooling degree and the defrosting temperature of each outdoor unit.
The judging module 22 is configured to judge whether the refrigerant accumulation occurs in each outdoor unit based on the low pressure, the supercooling degree and the defrosting temperature.
The control module 23 is used for performing liquid accumulation removal control on the target outdoor unit generating refrigerant accumulation.
According to the anti-effusion control device for the air conditioner, provided by the embodiment, whether the refrigerant accumulation exists in each outdoor unit is judged through linkage based on the low pressure, the supercooling degree and the defrosting temperature of each outdoor unit, so that the accuracy of effusion detection is improved, meanwhile, automatic effusion removal control is performed on the outdoor unit generating the refrigerant accumulation, the defect of insufficient circulating refrigerant of an air conditioning system is avoided, the running reliability of an air conditioning unit is guaranteed, and the use comfort of the air conditioner is improved.
In one embodiment, the judging module 22 is further configured to calculate an average low pressure based on the low pressure of each outdoor unit; judging whether the low pressure of each outdoor unit is larger than the average low pressure, and screening out a first target outdoor unit with the low pressure larger than the average low pressure; and judging whether the refrigerant accumulation occurs in the first target outdoor unit or not based on the supercooling degree and the defrosting temperature.
In one embodiment, the determining module 22 is further configured to determine whether the supercooling degree of each first target outdoor unit is greater than or equal to a first preset temperature, and screen out second target outdoor units with supercooling degrees greater than or equal to the first preset temperature from the first target outdoor units; and judging whether the refrigerant accumulation occurs in the second target outdoor unit based on the defrosting temperature.
In one embodiment, the determining module 22 is further configured to detect a current outdoor environment temperature, and calculate a temperature difference between the defrosting temperature of each second target outdoor unit and the outdoor environment temperature; and determining the outdoor unit with the temperature difference less than or equal to a second preset temperature in the second target outdoor unit as the target outdoor unit with the refrigerant accumulation.
In one embodiment, the control module 23 is further configured to control the compressor frequency of the target outdoor unit to increase the preset frequency so as to make the refrigerant stored in the target outdoor unit flow out.
In one embodiment, the first preset temperature is 8-12 ℃ and the second preset temperature is 1-3 ℃.
In one embodiment, the preset frequency is 5% to 15% of the current operating frequency of the compressor.
According to the anti-hydrops control device for the air conditioner, provided by the embodiment, whether the outdoor unit is hydrops is judged through linkage judgment of the low pressure, the supercooling degree and the defrosting temperature of the outdoor unit, so that the hydrops judgment accuracy is greatly improved; meanwhile, the accumulated liquid of the outdoor unit is accurately and effectively identified, and the accumulated liquid is pertinently regulated, so that the running reliability and the use comfort of the unit can be effectively ensured.
Corresponding to the air conditioner anti-dropsy control method provided in the above embodiment, the present embodiment provides an air conditioner including a computer readable storage medium storing a computer program and a processor, where the computer program is read and executed by the processor to implement the air conditioner anti-dropsy control method provided in the above embodiment. The air conditioner comprises a plurality of outdoor units connected in parallel.
The present embodiment also provides a computer readable storage medium, on which a computer program is stored, where the computer program when executed by a processor implements each process of the above embodiment of the anti-dropsy control method for an air conditioner, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.
Of course, it will be appreciated by those skilled in the art that implementing all or part of the above-described methods in the embodiments may be implemented by a computer level to instruct a control device, where the program may be stored in a computer readable storage medium, and the program may include the above-described methods in the embodiments when executed, where the storage medium may be a memory, a magnetic disk, an optical disk, or the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. The embodiment of the disclosed control device for preventing liquid accumulation of air conditioner and air conditioner are corresponding to the disclosed control method for preventing liquid accumulation of air conditioner, so the description is relatively simple, and the relevant parts are only referred to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Claims (7)
1. The liquid accumulation prevention control method for the air conditioner is characterized by comprising the following steps of:
detecting the low pressure, supercooling degree and defrosting temperature of each outdoor unit;
judging whether refrigerant accumulation occurs in each outdoor unit based on the low pressure, the supercooling degree and the defrosting temperature;
the liquid accumulation removing control is carried out on the target outdoor unit where the refrigerant accumulation occurs;
the step of judging whether refrigerant accumulation occurs in each outdoor unit based on the low pressure, the supercooling degree and the defrosting temperature includes:
calculating an average low pressure based on the low pressure of each of the outdoor units;
judging whether the low pressure of each outdoor unit is larger than the average low pressure, and screening out a first target outdoor unit with the low pressure larger than the average low pressure;
judging whether the supercooling degree of each first target outdoor unit is larger than or equal to a first preset temperature, and screening a second target outdoor unit with the supercooling degree larger than or equal to the first preset temperature from the first target outdoor units;
detecting the current outdoor environment temperature, and calculating the temperature difference value between the defrosting temperature of each second target outdoor unit and the outdoor environment temperature;
and determining the outdoor unit with the temperature difference less than or equal to a second preset temperature in the second target outdoor unit as the target outdoor unit with the refrigerant accumulation.
2. The air conditioner anti-liquid accumulation control method according to claim 1, wherein said step of performing liquid accumulation removal control on a target outdoor unit in which said refrigerant accumulation occurs includes:
and controlling the frequency of the compressor of the target outdoor unit to increase the preset frequency so as to enable the refrigerant stored in the target outdoor unit to flow out.
3. The method of claim 1, wherein the first preset temperature is 8-12 ℃ and the second preset temperature is 1-3 ℃.
4. The method of claim 3, wherein the preset frequency is 5% to 15% of the current operating frequency of the compressor.
5. An anti-hydrops control device of an air conditioner is characterized by comprising:
the detection module is used for respectively detecting the low pressure, the supercooling degree and the defrosting temperature of each outdoor unit;
the judging module is used for judging whether refrigerant accumulation occurs in each outdoor unit or not based on the low pressure, the supercooling degree and the defrosting temperature;
the control module is used for performing liquid accumulation removal control on the target outdoor unit where the refrigerant accumulation occurs;
the judging module is used for calculating average low-pressure based on the low-pressure of each outdoor unit; judging whether the low pressure of each outdoor unit is larger than the average low pressure, and screening out a first target outdoor unit with the low pressure larger than the average low pressure; judging whether the supercooling degree of each first target outdoor unit is larger than or equal to a first preset temperature, and screening a second target outdoor unit with the supercooling degree larger than or equal to the first preset temperature from the first target outdoor units; detecting the current outdoor environment temperature, and calculating the temperature difference value between the defrosting temperature of each second target outdoor unit and the outdoor environment temperature; and determining the outdoor unit with the temperature difference less than or equal to a second preset temperature in the second target outdoor unit as the target outdoor unit with the refrigerant accumulation.
6. An air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program implementing the method of any one of claims 1-4 when read and run by the processor.
7. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when read and run by a processor, implements the method according to any of claims 1-4.
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Effective date of registration: 20221020 Address after: 315191 No. 1166 Mingguang North Road, Jiangshan Town, Ningbo, Zhejiang, Yinzhou District Applicant after: NINGBO AUX ELECTRIC Co.,Ltd. Applicant after: AUX AIR CONDITIONING LIMITED BY SHARE Ltd. Address before: 315191 No. 1166 Mingguang North Road, Jiangshan Town, Ningbo, Zhejiang, Yinzhou District Applicant before: NINGBO AUX ELECTRIC Co.,Ltd. Applicant before: Ningbo Oxfam intelligent commercial air conditioning manufacturing Co.,Ltd. |
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