CN113654263B - Control method and control device of air conditioner, air conditioner and readable storage medium - Google Patents

Control method and control device of air conditioner, air conditioner and readable storage medium Download PDF

Info

Publication number
CN113654263B
CN113654263B CN202110873789.1A CN202110873789A CN113654263B CN 113654263 B CN113654263 B CN 113654263B CN 202110873789 A CN202110873789 A CN 202110873789A CN 113654263 B CN113654263 B CN 113654263B
Authority
CN
China
Prior art keywords
compressor
air conditioner
refrigerant
indoor
refrigerant pipeline
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110873789.1A
Other languages
Chinese (zh)
Other versions
CN113654263A (en
Inventor
胡火岩
朱声浩
李健锋
冉靖杰
梁昭军
姚嘉
刘帅帅
黎飞
李东
周壮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GD Midea Air Conditioning Equipment Co Ltd
Midea Group Wuhan HVAC Equipment Co Ltd
Original Assignee
GD Midea Air Conditioning Equipment Co Ltd
Midea Group Wuhan HVAC Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GD Midea Air Conditioning Equipment Co Ltd, Midea Group Wuhan HVAC Equipment Co Ltd filed Critical GD Midea Air Conditioning Equipment Co Ltd
Priority to CN202110873789.1A priority Critical patent/CN113654263B/en
Publication of CN113654263A publication Critical patent/CN113654263A/en
Application granted granted Critical
Publication of CN113654263B publication Critical patent/CN113654263B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/029—Control issues
    • F25B2313/0291—Control issues related to the pressure of the indoor unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/027—Compressor control by controlling pressure
    • F25B2600/0271—Compressor control by controlling pressure the discharge pressure
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides a control method and a control device of an air conditioner, the air conditioner and a readable storage medium. The air conditioner comprises an outdoor unit and at least two indoor units, the outdoor unit comprises a compressor and a refrigerant pipeline, one end of the refrigerant pipeline is connected with an exhaust port of the compressor, the other end of the refrigerant pipeline is connected with a return air port of the compressor, and the control method comprises the following steps: controlling the air conditioner to operate in a set refrigeration mode; determining the number of indoor units in the running state and the running frequency of a compressor; controlling the flow of the refrigerant in the refrigerant pipeline according to the number and the operating frequency of the indoor units in the operating state; wherein the number is greater than or equal to 1. When the condensation risk of the air outlet of the indoor unit is detected, the refrigerant output from the air outlet of the compressor is directly guided back to the air return port of the compressor by arranging the refrigerant pipeline, so that the amount of the refrigerant participating in heat exchange of the indoor unit is reduced. When a small number of indoor units in the multi-split air conditioner are in an operating state, the indoor units are prevented from generating condensation.

Description

Control method and control device of air conditioner, air conditioner and readable storage medium
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a control method of an air conditioner, a control device of the air conditioner, the air conditioner and a readable storage medium.
Background
At present, an outdoor unit is connected with a plurality of indoor units in a multi-split air-conditioning system, only part of the indoor units in the multi-split air-conditioning system are in an operating state, and the indoor units are easy to generate condensation.
Disclosure of Invention
The present invention is directed to solving one of the technical problems of the prior art or the related art.
To this end, a first aspect of the present invention proposes a control method of an air conditioner.
A second aspect of the present invention provides a control apparatus of an air conditioner.
A third aspect of the present invention provides an air conditioner.
A fourth aspect of the present invention provides an air conditioner.
A fifth aspect of the present invention provides an air conditioner.
A sixth aspect of the invention proposes a readable storage medium.
In view of the above, according to a first aspect of the present invention, a method for controlling an air conditioner includes an outdoor unit and at least two indoor units, the outdoor unit includes a compressor and a refrigerant pipeline, one end of the refrigerant pipeline is connected to an exhaust port of the compressor, and the other end of the refrigerant pipeline is connected to a return port of the compressor, the method includes: controlling the air conditioner to operate in a set refrigeration mode; determining the number of indoor units in the running state and the running frequency of a compressor; controlling the flow rate of the refrigerant in the refrigerant pipeline according to the number and the operation frequency of the indoor units in the operation state; wherein the number is greater than or equal to 1.
The control method of the air conditioner is used for controlling the multi-split air conditioner. The multi-split air conditioner comprises at least two indoor units and an outdoor unit, wherein each indoor unit of the at least two indoor units is provided with an indoor heat exchanger, and a compressor, an outdoor heat exchanger and a refrigerant pipeline are arranged in the outdoor unit. The indoor heat exchanger, the compressor and the outdoor heat exchanger form a refrigerant loop. Under the condition that the air conditioner operates in a refrigeration mode, refrigerant output by an exhaust port of the compressor flows through the outdoor heat exchanger and the indoor heat exchanger to complete heat exchange, and then flows back into the compressor through a return air port of the compressor. The first end of the refrigerant pipeline is connected to the exhaust port of the compressor, and the second end of the refrigerant pipeline is connected to the return air port of the compressor. When the refrigerant pipeline is in a conducting state, part of high-temperature and high-pressure refrigerant discharged by the compressor through the exhaust port directly flows back to the air return port of the compressor through the refrigerant pipeline, the amount of the refrigerant entering a refrigerant loop is reduced, the amount of the refrigerant flowing through the indoor heat exchanger is reduced, and condensation at the air outlet of the indoor unit caused by too low temperature of the indoor heat exchanger is avoided.
And controlling the multi-split air conditioner to operate in a set refrigeration mode, and enabling a low-temperature refrigerant to enter the indoor heat exchanger for evaporation. The method comprises the steps of obtaining the number of running indoor units in the multi-split air conditioner and the running frequency of compressors in the outdoor units, judging the refrigerating capacity of a refrigerant entering an indoor heat exchanger of the running indoor unit according to the running frequency and the number of the running indoor units, and judging whether the risk of condensation generation exists at an air outlet of the indoor unit according to the determined refrigerating capacity of the refrigerant in the indoor heat exchanger of each indoor unit.
It can be understood that, during the operation of the cooling mode, at least one indoor unit of the multi-split air conditioner is in an operating state.
When the operation frequency of the compressor is detected to be within the set range and the number of the operating indoor units is small, the refrigerating capacity of the indoor heat exchanger of each indoor unit is judged to be too high, and then the probability that the air outlet of the operating indoor unit generates condensation is judged to be high. And if the operation frequency of the compressor is not in the set range or the number of the operated indoor units is large, judging that the refrigerating capacity of the indoor heat exchanger of each indoor unit is not too high, namely judging that the probability of generating condensation at the air outlet of the operated indoor unit is low. Under the condition that the probability that condensation is generated at the air outlet of the indoor unit is determined to be high, the refrigerant pipeline is controlled to be in a conducting state, part of the refrigerant output by the air outlet of the compressor is directly guided to the air return port of the compressor according to the set flow, the amount of the refrigerant flowing through the indoor heat exchanger is reduced, the refrigerating capacity of the indoor heat exchanger is reduced, condensation generated at the air outlet of the indoor unit of the multi-split air conditioner is avoided, and the use experience of a user is improved.
When the condensation risk of the air outlet of the indoor unit is detected, the refrigerant output from the air outlet of the compressor is directly guided back to the air return port of the compressor by arranging the refrigerant pipeline, and the amount of the refrigerant participating in heat exchange of the indoor unit is reduced under the condition that the operation frequency of the compressor does not need to be adjusted. When a small number of indoor units in the multi-split air conditioner are in an operating state, the indoor units are prevented from generating condensation.
In addition, according to the control method of the air conditioner in the above technical solution provided by the present invention, the following additional technical features may be further provided:
in one possible design, the step of controlling the refrigerant flow rate in the refrigerant pipeline according to the number and the operating frequency of the indoor units in the operating state specifically includes: controlling the refrigerant in the refrigerant pipeline to flow to a return air port of the compressor according to a set flow rate based on that the number of the indoor units in the running state is smaller than a set number and the running frequency of the compressor is smaller than a set running frequency; timing a first duration of the refrigerant pipeline in a conducting state; and controlling the refrigerant pipeline to be in a broken circuit state based on the first duration reaching the first duration and/or the number of the indoor units in the running state being larger than or equal to the set number, and returning to the step of controlling the air conditioner to run in the set refrigeration mode.
In the design, the number of the running indoor units is less than the set number, and the running frequency of the compressor is less than the set running frequency, the refrigerating capacity of the running indoor units at the moment is judged to be too high, in order to avoid condensation generated at the air outlet of the indoor unit, the refrigerant pipeline is controlled to be in a conducting state, part of the refrigerant output by the air outlet of the compressor is directly guided to the air return port of the compressor according to the set flow, the amount of the refrigerant flowing through the indoor heat exchanger is reduced, the temperature at the air outlet of the indoor unit is ensured not to be too low, and the condition that condensation is generated at the air outlet of the indoor unit due to too low temperature of the air outlet is avoided.
Timing a first duration of the conducting state of the refrigerant pipeline, judging that the amount of the refrigerant in the heat exchanger is reduced when detecting that the first duration reaches the first duration, namely the refrigerating capacity of the indoor unit is reduced, controlling the refrigerant channel to recover the open circuit state, and continuously and completely flowing the refrigerant at the exhaust port of the compressor into a refrigerant loop at the moment, namely the air conditioner continues to operate in a normal refrigerating mode.
Timing is carried out when first duration that switches on through to the refrigerant pipeline to the on-off state of long control refrigerant pipeline when first duration that switches on according to the refrigerant pipeline avoids the refrigerant pipeline to switch on the indoor set refrigeration effect variation that leads to for a long time, carries out automatic control to the break-make of refrigerant pipeline when first duration is long, has realized avoiding under the prerequisite that the indoor set air outlet produced the condensation, can also guarantee the refrigeration effect of indoor set.
Under the condition that the refrigerant pipeline is in a conducting state, if the fact that the rest indoor units start to operate is detected, and the number of the operating indoor units is larger than or equal to the set number, the refrigerant pipeline is controlled to be recovered to a short-circuit state, at the moment, the refrigerant at the exhaust port of the compressor continuously and completely flows into the refrigerant loop, the refrigerant is provided for the indoor heat exchangers of the indoor units, and the air conditioner continuously operates in a normal refrigeration mode.
In the operation process of the multi-split air conditioning system, on the premise of not adjusting the operation frequency of the compressor, the number of the indoor units in the operation state is increased, so that the refrigeration effect of each indoor unit is reduced. When the refrigerant pipeline is in a conducting state, the refrigerating capacity of the indoor units is further reduced due to the increase of the starting number of the indoor units, and the refrigerating effect of each indoor unit can be ensured by controlling the refrigerant pipeline to be disconnected. The on-off of the refrigerant pipeline is automatically controlled according to the number of the running indoor units, so that the refrigeration effect of the indoor units can be ensured on the premise of avoiding condensation at the air outlet of the indoor units.
In one possible design, the number is set to 2.
In this design, when the number of the operating indoor units in the multi-split air conditioner is only one, even if the compressor operates at the minimum frequency, the refrigerating capacity of the indoor unit is still excessive, which may cause condensation of the indoor unit. Therefore, when the multi-split air conditioner is in a set refrigeration running mode and only one indoor unit is in a running state, the refrigerant pipeline in the outdoor unit is controlled to be in a conducting state, only part of refrigerant in the compressor participates in heat exchange of the indoor unit, the refrigeration capacity of the indoor unit is reduced, and the condition that the indoor unit generates condensation when only one indoor unit of the multi-split air conditioner is in the running state is avoided.
In the multi-split air conditioner, when the number of the running indoor units is two or more, the refrigerants output by the compressor can be distributed into each indoor unit, so that refrigerant pipelines in the outdoor units are controlled to be in a broken circuit state, all the refrigerants in the compressor participate in the heat exchange of the indoor units, and each indoor unit in a running state is guaranteed to have high refrigerating capacity.
It is worth to be noted that when a plurality of indoor units are in an operating state at the same time, the adjustment of the refrigerating capacity of the indoor units can be realized by adjusting the operating frequency of the compressor, so that the condensation of the indoor units when the plurality of indoor units are in operation is avoided.
In a possible design, the outdoor unit further includes an electromagnetic valve disposed on the refrigerant pipeline, and the step of controlling the refrigerant in the refrigerant pipeline to flow to the return air port of the compressor according to a set flow rate specifically includes: the solenoid valve is controlled to switch the open/close state at a set period.
In this design, the outdoor unit further includes an electromagnetic valve disposed on the refrigerant line. The electromagnetic valve is used for controlling the on-off state of the refrigerant pipeline.
The electromagnetic valve is controlled to perform switching according to a set period, so that the refrigerant in the refrigerant pipeline can flow to the return air port of the compressor according to a set flow rate. After the electromagnetic valve is controlled to be opened for a set time, the electromagnetic valve is controlled to be closed for a set time, so that part of the refrigerant discharged from the exhaust port of the compressor directly enters the return air port of the compressor through the refrigerant pipeline.
The invention can reduce the quantity of the refrigerant flowing to the indoor heat exchanger by periodically controlling the electromagnetic valve to execute the opening and closing action, and can avoid the condition that the refrigerating effect of the indoor unit is poor because the indoor unit is under the working condition of less refrigerant for a long time. On the premise of ensuring the energy efficiency of the air conditioner, the condensation of the indoor unit is avoided.
In some embodiments, the refrigerant flow rate in the refrigerant pipeline is adjusted by controlling the opening degree of the electromagnetic valve.
In one possible design, the set period may range from 5 minutes to 20 minutes.
In the design, the set period is set to be more than or equal to 5 minutes, so that the impact on the return air port of the compressor caused by the frequent switching action of the electromagnetic valve is avoided, and the service life of the electromagnetic valve is prolonged. The set period is set to be less than or equal to 20 minutes, so that the problem that the refrigeration effect of the indoor unit is reduced due to the fact that the electromagnetic valve is in a conducting state for a long time and the refrigerant quantity in the indoor heat exchanger is insufficient for a long time can be avoided, and the problem that the energy efficiency of the whole air conditioner is reduced is solved.
In one possible design, the step of controlling the air conditioner to operate in the cooling mode includes: responding to a refrigerating operation instruction, and controlling the air conditioner to start to operate; and acquiring working condition parameters of the air conditioner, and adjusting the target heat exchanger temperature of the indoor unit according to the relation between the working condition parameters and the set parameter range.
In this design, the cooling mode is set to a condensation prevention mode of the multi-split air conditioner in a cooling operation. And receiving a refrigeration operation instruction, controlling the multi-split air conditioner to be in a normal refrigeration operation mode, acquiring working condition parameters of the air conditioner in the normal refrigeration operation mode, comparing the working condition parameters with a set parameter range, and adjusting the temperature of a target heat exchanger of the indoor unit according to the comparison relation between the working condition parameters and the set parameter range.
The invention directly takes the temperature of the heat exchanger as a control target, and can ensure that condensation of the indoor unit caused by the over-low temperature of the heat exchanger can not occur in the running process of the multi-split air conditioner.
In one possible design, the step of adjusting the target heat exchanger temperature of the air conditioner according to the relationship between the working condition parameter and the set parameter range specifically includes: timing a second duration of which the working condition parameter is within the set parameter range; controlling the air conditioner to operate according to the first target heat exchanger temperature of the indoor unit based on the second duration reaching the second duration; and controlling the air conditioner to operate according to the second target heat exchanger temperature of the indoor unit based on the condition parameter being out of the set range or the second duration not reaching the second duration.
In the design, when the working condition parameters are within the set parameter range and the working condition parameters are kept for the second time, the risk that the indoor unit generates condensation when the multi-split air conditioner operates in the cooling mode is judged, the air conditioner is controlled to start to operate according to the first target heat exchanger temperature, it can be understood that the indoor unit cannot generate condensation when the heat exchanger temperature of the indoor unit is the first target heat exchanger temperature, and therefore the condensation preventing function of the multi-split air conditioner is achieved.
And when the working condition parameters are detected to be out of the set parameter range, judging that the multi-split air conditioner does not have the risk of condensation generated by the indoor unit when running in the refrigeration mode, controlling the air conditioner to start running according to the temperature of the second target heat exchanger, and ensuring the refrigeration effect of the indoor unit when the air conditioner continues to run in the normal refrigeration mode.
And when the working condition parameters are detected to be within the set parameter range and the second duration time does not reach the second duration time, judging that the risk of condensation generated by the indoor unit does not exist when the online air conditioner operates in the refrigeration mode, controlling the air conditioner to start to operate according to the temperature of the second target heat exchanger, and ensuring the refrigeration effect of the indoor unit when the air conditioner continuously operates in the normal refrigeration mode.
The target heat exchanger temperature of the indoor unit is determined according to the working condition parameters of the air conditioner, the air conditioner is controlled according to the target heat exchanger temperature, and when the multi-split air conditioner operates in a cooling mode, the cooling effect of the indoor unit is guaranteed, and condensation of the indoor unit is avoided.
In one possible design, the first target heat exchanger temperature is higher than the second target heat exchanger temperature.
In this design, the first target heat exchanger temperature is higher than the second target heat exchanger temperature. It can be understood that the lower the temperature of the heat exchanger of the indoor unit is, the lower the temperature of the air outlet of the indoor unit is, the higher the possibility of generating condensation is, the condensation risk of the indoor unit is detected, the temperature of the indoor heat exchanger is controlled to be increased, and the condensation of the air outlet of the air conditioner can be effectively avoided.
In one possible design, the indoor unit includes an indoor fan, the operating parameters include an indoor ambient temperature, an outdoor ambient temperature, and an operating power of the indoor fan, and the operating parameters within a set parameter range include: the indoor environment temperature is in the second set temperature range, and/or the outdoor environment temperature is in the third set temperature range, and/or the operation power is in the set power range.
In this design, the operating parameters include the outdoor ambient temperature of the environment in which the indoor unit is located, the indoor ambient temperature, and the operating power of the indoor fan.
And when the outdoor environment temperature and the indoor environment temperature are detected to be in a third set temperature range and a second set temperature range respectively, and the operating power of the fan of the indoor unit is in a set power range, judging that the indoor unit has the risk of condensation.
The operation power of the indoor unit fan is within a set power range, namely the wind speed output by the indoor unit fan is less than or equal to 20%, and the wind speed of the indoor unit fan is less than or equal to 20%, so that air with low temperature cannot be rapidly conveyed out of the indoor unit, namely the stay time of the air with low temperature at the air outlet of the indoor unit is long, and the possibility of condensation of the air outlet of the indoor unit is increased.
According to a second aspect of the present invention, a control device for an air conditioner is provided, the air conditioner including an outdoor unit and at least two indoor units, the outdoor unit including a compressor and a refrigerant pipeline, one end of the refrigerant pipeline being connected to an exhaust port of the compressor, the other end of the refrigerant pipeline being connected to a return port of the compressor, the control device including: the first control unit is used for controlling the air conditioner to operate in a set refrigeration mode; a determining unit for determining the number of indoor units in operation and the operation frequency of the compressor; the second control unit is used for controlling the refrigerant flow in the refrigerant pipeline according to the number and the operation frequency of the indoor units in the operation state; wherein the number of the units is not less than 1.
The control device of the air conditioner is used for controlling the multi-split air conditioner. The multi-split air conditioner comprises at least two indoor units and an outdoor unit, wherein each indoor unit of the at least two indoor units is provided with an indoor heat exchanger, and a compressor, an outdoor heat exchanger and a refrigerant pipeline are arranged in the outdoor unit. The indoor heat exchanger, the compressor and the outdoor heat exchanger form a refrigerant loop. Under the condition that the air conditioner operates in a refrigeration mode, refrigerant output by an exhaust port of the compressor flows through the outdoor heat exchanger and the indoor heat exchanger to complete heat exchange, and then flows back into the compressor through a return air port of the compressor. The first end of the refrigerant pipeline is connected to the exhaust port of the compressor, and the second end of the refrigerant pipeline is connected to the return air port of the compressor. When the refrigerant pipeline is in a conducting state, part of high-temperature and high-pressure refrigerant discharged by the compressor through the exhaust port directly flows back to the air return port of the compressor through the refrigerant pipeline, the amount of the refrigerant entering a refrigerant loop is reduced, the amount of the refrigerant flowing through the indoor heat exchanger is reduced, and condensation at the air outlet of the indoor unit caused by too low temperature of the indoor heat exchanger is avoided.
And controlling the multi-split air conditioner to operate in a set refrigeration mode, and enabling a low-temperature refrigerant to enter the indoor heat exchanger for evaporation. The method comprises the steps of obtaining the number of running indoor units in the multi-split air conditioner and the running frequency of compressors in the outdoor units, judging the refrigerating capacity of a refrigerant entering an indoor heat exchanger of the running indoor units according to the running frequency and the number of the running indoor units, and judging whether the risk of condensation generation exists at an air outlet of each indoor unit according to the determined refrigerating capacity of the refrigerant in the indoor heat exchanger of each indoor unit.
It can be understood that, during the operation of the cooling mode, at least one indoor unit of the multi-split air conditioner is in an operating state.
When the operation frequency of the compressor is detected to be within the set range and the number of the operating indoor units is small, the refrigerating capacity of the indoor heat exchanger of each indoor unit is judged to be too high, and then the probability that the air outlet of the operating indoor unit generates condensation is judged to be high. And if the operation frequency of the compressor is not in the set range or the number of the operated indoor units is large, judging that the refrigerating capacity of the indoor heat exchanger of each indoor unit is not too high, namely judging that the probability of generating condensation at the air outlet of the operated indoor unit is low. Under the condition that the probability that condensation is generated at the air outlet of the indoor unit is determined to be high, the refrigerant pipeline is controlled to be in a conducting state, part of the refrigerant output by the air outlet of the compressor is directly guided to the air return port of the compressor according to the set flow, the amount of the refrigerant flowing through the indoor heat exchanger is reduced, the refrigerating capacity of the indoor heat exchanger is reduced, condensation generated at the air outlet of the indoor unit of the multi-split air conditioner is avoided, and the use experience of a user is improved.
When the condensation risk of the air outlet of the indoor unit is detected, the refrigerant output from the air outlet of the compressor is directly guided back to the air return port of the compressor by arranging the refrigerant pipeline, and the amount of the refrigerant participating in heat exchange of the indoor unit is reduced under the condition that the operation frequency of the compressor does not need to be adjusted. When a small number of indoor units in the multi-split air conditioner are in an operating state, the indoor units are prevented from generating condensation.
According to a third aspect of the present invention, there is provided an air conditioner comprising: the outdoor unit comprises a compressor and a refrigerant pipeline, wherein the first end of the refrigerant pipeline is connected with an exhaust port of the compressor, and the second end of the refrigerant pipeline is connected with a return air port of the compressor; at least two indoor units connected with the outdoor unit; the control device of the air conditioner according to the second aspect is connected to the outdoor unit and the indoor unit.
The air conditioner provided by the invention is a multi-split air conditioner. The multi-split air conditioner comprises at least two indoor units and an outdoor unit, wherein each indoor unit of the at least two indoor units is provided with an indoor heat exchanger, and a compressor, an outdoor heat exchanger and a refrigerant pipeline are arranged in the outdoor unit. The indoor heat exchanger, the compressor and the outdoor heat exchanger form a refrigerant loop. Under the condition that the air conditioner operates in a refrigeration mode, refrigerant output by an exhaust port of the compressor flows through the outdoor heat exchanger and the indoor heat exchanger to complete heat exchange, and then flows back into the compressor through a return air port of the compressor. The first end of the refrigerant pipeline is connected to the exhaust port of the compressor, and the second end of the refrigerant pipeline is connected to the return air port of the compressor. When the refrigerant pipeline is in a conducting state, part of high-temperature and high-pressure refrigerant discharged by the compressor through the exhaust port directly flows back to the air return port of the compressor through the refrigerant pipeline, the amount of the refrigerant entering a refrigerant loop is reduced, the amount of the refrigerant flowing through the indoor heat exchanger is reduced, and condensation at the air outlet of the indoor unit caused by too low temperature of the indoor heat exchanger is avoided.
The multi-split air conditioner further comprises a control device of the air conditioner, and the control device of the air conditioner is the control device in the second aspect, so that all the beneficial technical effects of the control device of the air conditioner in the second aspect are achieved, and redundant description is omitted.
According to a fourth aspect of the present invention, there is provided an air conditioner comprising: a memory having a program or instructions stored therein; the processor, which executes the program or the instructions stored in the memory to implement the steps of the control method of the air conditioner according to any one of the above possible designs, thereby having all the beneficial technical effects of the control method of the air conditioner according to any one of the above possible designs, and not being described in detail herein.
The air conditioner provided by the invention is a multi-split air conditioner. The multi-split air conditioner comprises at least two indoor units and an outdoor unit, wherein each indoor unit of the at least two indoor units is provided with an indoor heat exchanger, and a compressor, an outdoor heat exchanger and a refrigerant pipeline are arranged in the outdoor unit. The indoor heat exchanger, the compressor and the outdoor heat exchanger form a refrigerant loop. Under the condition that the air conditioner operates in a refrigeration mode, refrigerant output by an exhaust port of the compressor flows through the outdoor heat exchanger and the indoor heat exchanger to complete heat exchange, and then flows back into the compressor through a return air port of the compressor. The first end of the refrigerant pipeline is connected to the exhaust port of the compressor, and the second end of the refrigerant pipeline is connected to the return air port of the compressor. When the refrigerant pipeline is in a conducting state, part of high-temperature and high-pressure refrigerant discharged by the compressor through the exhaust port directly flows back to the air return port of the compressor through the refrigerant pipeline, the amount of the refrigerant entering a refrigerant loop is reduced, the amount of the refrigerant flowing through the indoor heat exchanger is reduced, and condensation at the air outlet of the indoor unit caused by too low temperature of the indoor heat exchanger is avoided.
According to a fifth aspect of the present invention, there is provided an air conditioner comprising: the outdoor unit comprises a compressor and a refrigerant pipeline, wherein the first end of the refrigerant pipeline is connected with an exhaust port of the compressor, and the second end of the refrigerant pipeline is connected with a return air port of the compressor; at least two indoor units connected with the outdoor unit; a control device for controlling the air conditioner to operate in a cooling mode; determining the number of indoor units in the running state and the running frequency of a compressor; controlling the on-off state of the refrigerant pipeline according to the number and the operating frequency of the indoor units in the operating state; wherein the number is greater than or equal to 1.
The air conditioner provided by the invention is a multi-split air conditioner. The multi-split air conditioner comprises at least two indoor units and an outdoor unit, wherein each indoor unit of the at least two indoor units is provided with an indoor heat exchanger, and a compressor, an outdoor heat exchanger and a refrigerant pipeline are arranged in the outdoor unit. The indoor heat exchanger, the compressor and the outdoor heat exchanger form a refrigerant loop. Under the condition that the air conditioner operates in a refrigeration mode, refrigerant output by an exhaust port of the compressor flows through the outdoor heat exchanger and the indoor heat exchanger to complete heat exchange, and then flows back into the compressor through a return air port of the compressor. The first end of the refrigerant pipeline is connected to the exhaust port of the compressor, and the second end of the refrigerant pipeline is connected to the return air port of the compressor. When the refrigerant pipeline is in a conducting state, part of high-temperature and high-pressure refrigerant discharged by the compressor through the exhaust port directly flows back to the air return port of the compressor through the refrigerant pipeline, the amount of the refrigerant entering a refrigerant loop is reduced, the amount of the refrigerant flowing through the indoor heat exchanger is reduced, and condensation at the air outlet of the indoor unit caused by too low temperature of the indoor heat exchanger is avoided.
And controlling the multi-split air conditioner to operate in a set refrigeration mode, and enabling a low-temperature refrigerant to enter the indoor heat exchanger for evaporation. The method comprises the steps of obtaining the number of running indoor units in the multi-split air conditioner and the running frequency of compressors in the outdoor units, judging the refrigerating capacity of a refrigerant entering an indoor heat exchanger of the running indoor units according to the running frequency and the number of the running indoor units, and judging whether the risk of condensation generation exists at an air outlet of each indoor unit according to the determined refrigerating capacity of the refrigerant in the indoor heat exchanger of each indoor unit.
It can be understood that, during the operation of the cooling mode, at least one indoor unit of the multi-split air conditioner is in an operating state.
When the operation frequency of the compressor is detected to be within the set range and the number of the operating indoor units is small, the refrigerating capacity of the indoor heat exchanger of each indoor unit is judged to be too high, and then the probability that the air outlet of the operating indoor unit generates condensation is judged to be high. And if the operation frequency of the compressor is not in the set range or the number of the operated indoor units is large, judging that the refrigerating capacity of the indoor heat exchanger of each indoor unit is not too high, namely judging that the probability of generating condensation at the air outlet of the operated indoor unit is low. Under the condition that the probability that condensation is generated at the air outlet of the indoor unit is determined to be high, the refrigerant pipeline is controlled to be in a conducting state, part of the refrigerant output by the air outlet of the compressor is directly guided to the air return port of the compressor according to the set flow, the amount of the refrigerant flowing through the indoor heat exchanger is reduced, the refrigerating capacity of the indoor heat exchanger is reduced, condensation generated at the air outlet of the indoor unit of the multi-split air conditioner is avoided, and the use experience of a user is improved.
When the condensation risk of the air outlet of the indoor unit is detected, the refrigerant output from the air outlet of the compressor is directly guided back to the air return port of the compressor by arranging the refrigerant pipeline, and the amount of the refrigerant participating in heat exchange of the indoor unit is reduced under the condition that the operation frequency of the compressor does not need to be adjusted. When a small number of indoor units in the multi-split air conditioner are in an operating state, the indoor units are prevented from generating condensation.
In addition, according to the air conditioner in the above technical solution provided by the present invention, the following additional technical features may be further provided:
in one possible design, the outdoor unit further includes: and the electromagnetic valve is arranged on the refrigerant pipeline and used for controlling the refrigerant flow in the refrigerant pipeline.
In this design, the outdoor unit further includes an electromagnetic valve disposed on the refrigerant pipe. The electromagnetic valve is used for controlling the on-off state of the refrigerant pipeline. The electromagnetic valve is controlled to perform switching action according to a set period, so that the refrigerant in the refrigerant pipeline can flow to the return air port of the compressor according to a set flow rate. After the electromagnetic valve is controlled to be opened for a set time, the electromagnetic valve is controlled to be closed for a set time, so that part of the refrigerant discharged from the exhaust port of the compressor directly enters the return air port of the compressor through the refrigerant pipeline.
In some embodiments, the refrigerant flow rate in the refrigerant pipeline is adjusted by controlling the opening degree of the electromagnetic valve.
In one possible design, the outdoor unit further includes: and the gas-liquid separator is connected with the air return port of the compressor, and the second end of the refrigerant pipeline is connected with the gas-liquid separator.
In the design, the high-temperature and high-pressure refrigerant discharged from the exhaust port of the compressor is conveyed to the gas-liquid separator through the refrigerant pipeline and flows to the return air port of the compressor through the gas-liquid separator, so that the high-temperature and high-pressure refrigerant at the exhaust port is prevented from directly impacting the return air port of the compressor.
According to a sixth aspect of the present invention, there is provided a readable storage medium, on which a program or instructions are stored, which when executed by a processor, implement the steps of the control method of the air conditioner as in any one of the possible designs of the first aspect. Therefore, the method has all the beneficial technical effects of any possible design of the control method of the air conditioner in the first aspect, and will not be described in detail herein.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows one of schematic flowcharts of a control method of an air conditioner in a first embodiment of the invention;
fig. 2 shows a second schematic flowchart of a control method of an air conditioner in the first embodiment of the present invention;
fig. 3 is a third schematic flowchart of a control method of an air conditioner in the first embodiment of the present invention;
fig. 4 is a fourth schematic flowchart showing a control method of an air conditioner in the first embodiment of the present invention;
fig. 5 is a schematic flow chart illustrating a control method of an air conditioner in a second embodiment of the present invention;
fig. 6 is a schematic block diagram showing a control apparatus of an air conditioner in a third embodiment of the present invention;
fig. 7 is a schematic structural view showing an air conditioner in a fourth embodiment of the present invention;
fig. 8 shows a schematic block diagram of an air conditioner in a fifth embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the names of the components in fig. 7 is:
700 air conditioner, 702 indoor heat exchanger, 704 outdoor heat exchanger, 706 compressor, 708 refrigerant pipeline, 710 electromagnetic valve, 712 gas-liquid separator.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A control method of an air conditioner, a control device 600 of an air conditioner, and a readable storage medium according to some embodiments of the present invention are described below with reference to fig. 1 to 8.
The first embodiment is as follows:
as shown in fig. 1, a first embodiment of the present invention provides a control method of an air conditioner.
The air conditioner is a multi-split air conditioner and comprises at least two indoor units and an outdoor unit.
The outdoor unit comprises a refrigerant pipeline and a compressor, wherein the first end of the refrigerant pipeline is connected with an exhaust port of the compressor, and the second end of the refrigerant pipeline is connected with a return air port of the compressor.
The control method of the air conditioner specifically comprises the following steps:
step 102, controlling the air conditioner to operate in a set refrigeration mode;
104, acquiring the running frequency of the compressor and the number of running indoor units;
and 104, controlling the refrigerant flow in the refrigerant pipeline according to the operation frequency and the number of the operated indoor units.
Wherein the number of the running indoor units is more than or equal to 1.
The control method of the air conditioner provided by the embodiment is used for controlling the multi-split air conditioner. The multi-split air conditioner comprises at least two indoor units and an outdoor unit, wherein each indoor unit of the at least two indoor units is provided with an indoor heat exchanger, and a compressor, an outdoor heat exchanger and a refrigerant pipeline are arranged in the outdoor unit. The indoor heat exchanger, the compressor and the outdoor heat exchanger form a refrigerant loop. Under the condition that the air conditioner operates in a refrigeration mode, refrigerant output by an exhaust port of the compressor flows through the outdoor heat exchanger and the indoor heat exchanger to complete heat exchange, and then flows back into the compressor through a return air port of the compressor. The first end of the refrigerant pipeline is connected to the exhaust port of the compressor, and the second end of the refrigerant pipeline is connected to the return air port of the compressor. When the refrigerant pipeline is in a conducting state, part of high-temperature and high-pressure refrigerant discharged by the compressor through the exhaust port directly flows back to the air return port of the compressor through the refrigerant pipeline, the amount of the refrigerant entering a refrigerant loop is reduced, the amount of the refrigerant flowing through the indoor heat exchanger is reduced, and condensation at the air outlet of the indoor unit caused by too low temperature of the indoor heat exchanger is avoided.
And controlling the multi-split air conditioner to operate in a set refrigeration mode, and enabling a low-temperature refrigerant to enter the indoor heat exchanger for evaporation. The method comprises the steps of obtaining the number of running indoor units in the multi-split air conditioner and the running frequency of compressors in the outdoor units, judging the refrigerating capacity of a refrigerant entering an indoor heat exchanger of the running indoor units according to the running frequency and the number of the running indoor units, and judging whether the risk of condensation generation exists at an air outlet of each indoor unit according to the determined refrigerating capacity of the refrigerant in the indoor heat exchanger of each indoor unit.
It can be understood that, during the operation of the cooling mode, at least one indoor unit of the multi-split air conditioner is in an operating state.
When the operation frequency of the compressor is detected to be within the set range and the number of the operating indoor units is small, the refrigerating capacity of the indoor heat exchanger of each indoor unit is judged to be too high, and then the probability that the air outlet of the operating indoor unit generates condensation is judged to be high. When the operation frequency of the compressor is detected not to be within the set range or the number of the operating indoor units is detected to be large, the refrigerating capacity of the indoor heat exchanger of each indoor unit is judged not to be too high, namely the probability that the air outlet of the operating indoor unit generates condensation is judged to be low. Under the condition that the probability that condensation is generated at the air outlet of the indoor unit is determined to be high, the refrigerant pipeline is controlled to be in a conducting state, part of the refrigerant output by the air outlet of the compressor is directly guided to the air return port of the compressor according to the set flow, the amount of the refrigerant flowing through the indoor heat exchanger is reduced, the refrigerating capacity of the indoor heat exchanger is reduced, condensation is prevented from being generated at the air outlet of the indoor unit of the multi-split air conditioner, and the use experience of a user is improved.
When the condensation risk of the air outlet of the indoor unit is detected, the refrigerant output from the air outlet of the compressor is directly guided back to the air return port of the compressor by arranging the refrigerant pipeline, and the amount of the refrigerant participating in heat exchange of the indoor unit is reduced under the condition that the operation frequency of the compressor does not need to be adjusted. When a small number of indoor units in the multi-split air conditioner are in an operating state, the indoor units are prevented from generating condensation.
As shown in fig. 2, in any of the above embodiments, the step of controlling the refrigerant flow rate in the refrigerant pipeline according to the operation frequency and the number of the operating indoor units specifically includes:
step 202, acquiring the number of the running indoor units and the running frequency of a compressor;
step 204, judging whether the number of the running indoor units is less than the set number, and the running frequency is less than the set running frequency, if so, executing step 206, otherwise, returning to execute step 202;
step 206, controlling the refrigerant in the refrigerant pipeline to flow to a return air port of the compressor according to the set flow;
step 208, timing the time length of the refrigerant pipeline in the conducting state to obtain a first duration time length;
step 210, judging whether the first duration is greater than or equal to the first duration and/or whether the output of the running indoor unit is greater than or equal to the set number, if so, executing step 212, and if not, returning to the step 208;
and step 212, controlling the refrigerant pipeline to be switched to an open circuit state, and controlling the air conditioner to operate according to a set refrigeration mode.
In this embodiment, when the number of the operating indoor units is less than the set number, and the operating frequency of the compressor is less than the set operating frequency, it is determined that the cooling capacity of the operating indoor unit is too high, and in order to prevent condensation from occurring at the air outlet of the indoor unit, the refrigerant pipeline is controlled to be in a conducting state, and a part of the refrigerant output from the air outlet of the compressor is directly guided to the air return port of the compressor according to the set flow rate, so that the amount of the refrigerant flowing through the indoor heat exchanger is reduced, it is ensured that the temperature at the air outlet of the indoor unit is not too low, and the occurrence of condensation at the air outlet of the indoor unit due to too low air outlet temperature is avoided.
Timing a first duration of the conducting state of the refrigerant pipeline, judging that the amount of the refrigerant in the heat exchanger is reduced when detecting that the first duration reaches the first duration, namely the refrigerating capacity of the indoor unit is reduced, controlling the refrigerant channel to recover the open circuit state, and continuously and completely flowing the refrigerant at the exhaust port of the compressor into a refrigerant loop at the moment, namely the air conditioner continues to operate in a normal refrigerating mode.
Timing is carried out when first duration that switches on through to the refrigerant pipeline to the on-off state of long control refrigerant pipeline when first duration that switches on according to the refrigerant pipeline avoids the refrigerant pipeline to switch on the indoor set refrigeration effect variation that leads to for a long time, carries out automatic control to the break-make of refrigerant pipeline when first duration is long, has realized avoiding under the prerequisite that the indoor set air outlet produced the condensation, can also guarantee the refrigeration effect of indoor set.
Under the condition that the refrigerant pipeline is in a conducting state, if the fact that the rest indoor units start to operate is detected, and the number of the operating indoor units is larger than or equal to the set number, the refrigerant pipeline is controlled to be recovered to a short-circuit state, at the moment, the refrigerant at the exhaust port of the compressor continuously and completely flows into the refrigerant loop, the refrigerant is provided for the indoor heat exchangers of the indoor units, and the air conditioner continuously operates in a normal refrigeration mode.
In the operation process of the multi-split air conditioning system, on the premise of not adjusting the operation frequency of the compressor, the number of the indoor units in the operation state is increased, which may cause the refrigeration effect of each indoor unit to be reduced. When the refrigerant pipeline is in a conducting state, the refrigerating capacity of the indoor units is further reduced due to the increase of the starting number of the indoor units, and the refrigerating effect of each indoor unit can be ensured by controlling the refrigerant pipeline to be disconnected. The on-off of the refrigerant pipeline is automatically controlled according to the number of the running indoor units, so that the refrigeration effect of the indoor units can be ensured on the premise of avoiding condensation at the air outlet of the indoor units.
In any of the above embodiments, the set number is 2.
In this embodiment, in the multi-split air conditioner, when the number of the operating indoor units is only one single unit, even if the compressor operates at the minimum frequency, the refrigerating capacity of the indoor unit is still excessive, which may cause condensation of the indoor unit. Therefore, when the multi-split air conditioner is in the set refrigeration operation mode and only one indoor unit is in the operation state, the refrigerant pipeline in the outdoor unit is controlled to be in the conduction state, so that only part of refrigerant in the compressor participates in the heat exchange of the indoor unit, the refrigeration capacity of the indoor unit is reduced, and the condition that the indoor unit generates condensation when only one indoor unit of the multi-split air conditioner is in the operation state is avoided.
In the multi-split air conditioner, when the number of the running indoor units is two or more, the refrigerants output by the compressor can be distributed into each indoor unit, so that refrigerant pipelines in the outdoor units are controlled to be in a broken circuit state, all the refrigerants in the compressor participate in the heat exchange of the indoor units, and each indoor unit in a running state is guaranteed to have high refrigerating capacity.
It is worth to be noted that when a plurality of indoor units are in an operating state at the same time, the adjustment of the refrigerating capacity of the indoor units can be realized by adjusting the operating frequency of the compressor, so that the condensation of the indoor units when the plurality of indoor units are in operation is avoided.
In any of the above embodiments, the step of controlling the refrigerant in the refrigerant pipeline to flow to the return air port of the compressor according to the set flow rate specifically includes: the solenoid valve is controlled to switch the open/close state at a set period.
In this embodiment, the outdoor unit further includes an electromagnetic valve disposed on the refrigerant pipeline. The electromagnetic valve is used for controlling the on-off state of the refrigerant pipeline.
The electromagnetic valve is controlled to perform switching action according to a set period, so that the refrigerant in the refrigerant pipeline can flow to the return air port of the compressor according to a set flow rate. After the electromagnetic valve is controlled to be opened for a set time, the electromagnetic valve is controlled to be closed for a set time, so that part of the refrigerant discharged from the exhaust port of the compressor directly enters the return air port of the compressor through the refrigerant pipeline.
The invention can reduce the quantity of the refrigerant flowing to the indoor heat exchanger by periodically controlling the electromagnetic valve to execute the opening and closing action, and can avoid the condition that the refrigerating effect of the indoor unit is poor because the indoor unit is under the working condition of less refrigerant for a long time. On the premise of ensuring the energy efficiency of the air conditioner, the condensation of the indoor unit is avoided.
In some embodiments, the refrigerant flow rate in the refrigerant pipeline is adjusted by controlling the opening degree of the electromagnetic valve.
In any of the above embodiments, the set period ranges from 5 minutes to 20 minutes.
In the embodiment, the set period is set to be greater than or equal to 5 minutes, so that the impact on the return air port of the compressor caused by frequent switching actions of the electromagnetic valve is avoided, and the service life of the electromagnetic valve is prolonged. The set period is set to be less than or equal to 20 minutes, so that the problem that the refrigeration effect of the indoor unit is reduced due to the fact that the electromagnetic valve is in a conducting state for a long time and the refrigerant quantity in the indoor heat exchanger is insufficient for a long time can be avoided, and the problem that the energy efficiency of the whole air conditioner is reduced is solved.
As shown in fig. 3, in any of the above embodiments, the step of controlling the air conditioner to operate in the cooling mode includes:
step 302, receiving a refrigeration operation instruction;
step 304, controlling the air conditioner to start to operate according to the refrigerating operation instruction;
step 306, collecting working condition parameters of the air conditioner;
and 308, adjusting the target heat exchanger temperature of the indoor unit according to the relationship between the set parameter range and the working condition parameters.
In this embodiment, the cooling mode is set to the condensation prevention mode of the multi-split air conditioner in the cooling operation. And receiving a refrigeration operation instruction, controlling the multi-split air conditioner to be in a normal refrigeration operation mode, acquiring working condition parameters of the air conditioner in the normal refrigeration operation mode, comparing the working condition parameters with a set parameter range, and adjusting the temperature of a target heat exchanger of the indoor unit according to the comparison relation between the working condition parameters and the set parameter range.
The invention directly takes the temperature of the heat exchanger as a control target, and can ensure that condensation of the indoor unit caused by the over-low temperature of the heat exchanger can not occur in the running process of the multi-split air conditioner.
As shown in fig. 4, in any of the above embodiments, the step of adjusting the target heat exchanger temperature of the indoor unit according to the relationship between the set parameter range and the operating condition parameter specifically includes:
step 402, timing the duration of the working condition parameter in the set parameter range, and determining a second duration;
step 404, determining whether the second duration is greater than or equal to the second duration, if so, executing step 406, otherwise, executing step 408;
step 406, controlling the air conditioner to operate according to the first target heat exchanger temperature;
and step 408, controlling the air conditioner to operate according to the second target heat exchanger temperature.
In this embodiment, when the operating condition parameters are within the set parameter range and the operating condition parameters are kept for the second time, it is determined that the multi-split air conditioner runs in the cooling mode and the risk that the indoor unit generates condensation exists, and at this time, the air conditioner is controlled to start running according to the first target heat exchanger temperature.
And when the working condition parameters are detected to be out of the set parameter range, judging that the multi-split air conditioner does not have the risk of condensation generated by the indoor unit when running in the refrigeration mode, and controlling the air conditioner to start running according to the temperature of the second target heat exchanger, so that the air conditioner continues to run in the normal refrigeration mode, and the refrigeration effect of the indoor unit is ensured.
And when the working condition parameters are detected to be within the set parameter range and the second duration time does not reach the second duration time, judging that the online air conditioner does not have the risk of condensation generated by the indoor unit when running in the refrigeration mode, controlling the air conditioner to start running according to the temperature of the second target heat exchanger, and ensuring the refrigeration effect of the indoor unit when the air conditioner continuously runs in the normal refrigeration mode.
The target heat exchanger temperature of the indoor unit is determined according to the working condition parameters of the air conditioner, the air conditioner is controlled according to the target heat exchanger temperature, and when the multi-split air conditioner operates in a refrigeration mode, the refrigeration effect of the indoor unit is guaranteed, and condensation of the indoor unit is avoided.
Wherein the first target heat exchanger temperature is higher than the second target heat exchanger temperature. It can be understood that the lower the temperature of the heat exchanger of the indoor unit is, the lower the temperature of the air outlet of the indoor unit is, the higher the possibility of generating condensation is, when the condensation risk of the indoor unit is detected, the temperature of the indoor heat exchanger is controlled to be raised, the condensation of the air outlet of the air conditioner can be effectively avoided,
in any of the above embodiments, the indoor unit includes an indoor fan.
The working condition parameters comprise outdoor environment temperature, indoor environment temperature and running power of the indoor fan.
The working condition parameters comprise the following parameters within the set parameter range:
the indoor ambient temperature is in the second set temperature range, and/or
The outdoor ambient temperature is in a third set temperature range, and/or
The operating power is within the set power range.
In this embodiment, the operating parameters include an outdoor ambient temperature of an environment where the indoor unit is located, an indoor ambient temperature, and an operating power of the indoor fan.
And when the outdoor environment temperature and the indoor environment temperature are detected to be in a third set temperature range and a second set temperature range respectively, and the operating power of the fan of the indoor unit is in a set power range, judging that the indoor unit has the risk of condensation.
The operation power of the indoor unit fan is within a set power range, namely the wind speed output by the indoor unit fan is less than or equal to 20%, and the wind speed of the indoor unit fan is less than or equal to 20%, so that air with low temperature cannot be rapidly conveyed out of the indoor unit, namely the stay time of the air with low temperature at the air outlet of the indoor unit is long, and the possibility of condensation of the air outlet of the indoor unit is increased.
Example two:
as shown in fig. 5, a second embodiment of the present invention provides a control method of an air conditioner.
The air conditioner is a multi-split air conditioner and comprises at least two indoor units and an outdoor unit.
The outdoor unit comprises a refrigerant pipeline and a compressor, wherein the first end of the refrigerant pipeline is connected with an exhaust port of the compressor, and the second end of the refrigerant pipeline is connected with a return air port of the compressor.
The control method of the air conditioner specifically comprises the following steps:
step 502, receiving a refrigeration operation instruction, and controlling an air conditioner to start to operate according to the refrigeration operation instruction;
step 504, collecting working condition parameters of the air conditioner, timing the duration of the working condition parameters in a set parameter range, and determining a second duration;
step 506, determining whether the second duration is greater than or equal to the second duration, if so, executing step 508, otherwise, executing step 510;
step 508, controlling the air conditioner to operate according to the temperature of the first target heat exchanger;
step 510, controlling the air conditioner to operate according to the temperature of the second target heat exchanger;
step 512, acquiring the number of the running indoor units and the running frequency of the compressor;
step 514, judging whether the number of the running indoor units is less than the set number and the running frequency is less than the set running frequency, if so, executing step 516, and if not, returning to execute step 508;
step 516, controlling the flow of the refrigerant in the refrigerant pipeline to flow to a return air port of the compressor according to the set flow;
518, timing the time length of the refrigerant pipeline in a conducting state to obtain a first duration time;
step 520, judging whether the first duration is greater than or equal to the first duration and/or whether the output of the running indoor unit is greater than or equal to the set number, if so, executing step 522, otherwise, returning to the step 508;
in step 522, the refrigerant pipeline is controlled to switch to the off state, and the process returns to step 514.
The control method of the air conditioner provided by the embodiment is used for controlling the multi-split air conditioner. The multi-split air conditioner comprises at least two indoor units and an outdoor unit, wherein each indoor unit of the at least two indoor units is provided with an indoor heat exchanger, and a compressor, an outdoor heat exchanger and a refrigerant pipeline are arranged in the outdoor unit. The indoor heat exchanger, the compressor and the outdoor heat exchanger form a refrigerant loop. Under the condition that the air conditioner operates in a refrigeration mode, refrigerant output by an exhaust port of the compressor flows through the outdoor heat exchanger and the indoor heat exchanger to complete heat exchange, and then flows back into the compressor through a return air port of the compressor. The first end of the refrigerant pipeline is connected to the exhaust port of the compressor, and the second end of the refrigerant pipeline is connected to the return air port of the compressor. When the refrigerant pipeline is in a conducting state, part of high-temperature and high-pressure refrigerant discharged by the compressor through the exhaust port directly flows back to the air return port of the compressor through the refrigerant pipeline, the amount of the refrigerant entering a refrigerant loop is reduced, the amount of the refrigerant flowing through the indoor heat exchanger is reduced, and condensation at the air outlet of the indoor unit caused by too low temperature of the indoor heat exchanger is avoided.
And controlling the multi-split air conditioner to operate in a set refrigeration mode, and enabling a low-temperature refrigerant to enter the indoor heat exchanger for evaporation. The method comprises the steps of obtaining the number of running indoor units in the multi-split air conditioner and the running frequency of compressors in the outdoor units, judging the refrigerating capacity of a refrigerant entering an indoor heat exchanger of the running indoor unit according to the running frequency and the number of the running indoor units, and judging whether the risk of condensation generation exists at an air outlet of the indoor unit according to the determined refrigerating capacity of the refrigerant in the indoor heat exchanger of each indoor unit.
It can be understood that, during the operation of the cooling mode, at least one indoor unit of the multi-split air conditioner is in an operating state.
When the operation frequency of the compressor is detected to be within the set range and the number of the operating indoor units is small, the refrigerating capacity of the indoor heat exchanger of each indoor unit is judged to be too high, and then the probability that the air outlet of the operating indoor unit generates condensation is judged to be high. When the operation frequency of the compressor is detected not to be within the set range or the number of the operating indoor units is detected to be large, the refrigerating capacity of the indoor heat exchanger of each indoor unit is judged not to be too high, namely the probability that the air outlet of the operating indoor unit generates condensation is judged to be low. Under the condition that the probability that condensation is generated at the air outlet of the indoor unit is determined to be high, the refrigerant pipeline is controlled to be in a conducting state, part of the refrigerant output by the air outlet of the compressor is directly guided to the air return port of the compressor according to the set flow, the amount of the refrigerant flowing through the indoor heat exchanger is reduced, the refrigerating capacity of the indoor heat exchanger is reduced, condensation generated at the air outlet of the indoor unit of the multi-split air conditioner is avoided, and the use experience of a user is improved.
When detecting that there is the condensation risk in the air outlet of the indoor set, directly flow the refrigerant of compressor gas vent output back to the return air inlet of compressor through setting up the refrigerant pipeline, need not to adjust under the condition of compressor operating frequency, reduced the refrigerant volume that the indoor set participated in the heat transfer. When a small number of indoor units in the multi-split air conditioner are in an operating state, the indoor units are prevented from generating condensation.
In some embodiments, the outdoor unit further includes an electromagnetic valve disposed on the refrigerant pipeline. The electromagnetic valve is used for controlling the on-off state of the refrigerant pipeline.
The electromagnetic valve is controlled to perform switching action according to a set period, so that the refrigerant in the refrigerant pipeline can flow to the return air port of the compressor according to a set flow rate. After the electromagnetic valve is controlled to be opened for a set time, the electromagnetic valve is controlled to be closed for a set time, so that part of the refrigerant discharged from the exhaust port of the compressor directly enters the return air port of the compressor through the refrigerant pipeline.
The opening and closing actions are executed through the periodical control electromagnetic valve, the quantity of the refrigerant flowing to the indoor heat exchanger can be reduced, and meanwhile, the situation that the refrigerating effect of the indoor unit is poor due to the fact that the indoor unit is under the working condition with few refrigerants for a long time can be avoided. On the premise of ensuring the energy efficiency of the air conditioner, the condition that the indoor unit generates condensation is avoided.
When the working condition parameters are within the set parameter range and the working condition parameters are kept for the second time, the risk that the indoor unit generates condensation when the multi-split air conditioner operates in the refrigeration mode is judged, the air conditioner is controlled to start to operate according to the first target heat exchanger temperature at the moment, it can be understood that the indoor unit cannot generate condensation when the heat exchanger temperature of the indoor unit is the first target heat exchanger temperature, and therefore the condensation preventing function of the multi-split air conditioner is achieved.
And when the working condition parameters are detected to be out of the set parameter range, judging that the multi-split air conditioner does not have the risk of condensation generated by the indoor unit when running in the refrigeration mode, controlling the air conditioner to start running according to the temperature of the second target heat exchanger, and ensuring the refrigeration effect of the indoor unit when the air conditioner continues to run in the normal refrigeration mode.
And when the working condition parameters are detected to be within the set parameter range and the second duration time does not reach the second duration time, judging that the online air conditioner does not have the risk of condensation generated by the indoor unit when running in the refrigeration mode, controlling the air conditioner to start running according to the temperature of the second target heat exchanger, and ensuring the refrigeration effect of the indoor unit when the air conditioner continuously runs in the normal refrigeration mode.
The target heat exchanger temperature of the indoor unit is determined according to the working condition parameters of the air conditioner, the air conditioner is controlled according to the target heat exchanger temperature, when the multi-split air conditioner operates in a cooling mode, the cooling effect of the indoor unit is guaranteed, and condensation of the indoor unit is avoided.
Wherein the first target heat exchanger temperature is higher than the second target heat exchanger temperature. It can be understood that the lower the temperature of the heat exchanger of the indoor unit is, the lower the temperature of the air outlet of the indoor unit is, the higher the probability of generating condensation is, when the condensation risk of the indoor unit is detected, the temperature rise of the indoor heat exchanger is controlled, the condensation of the air outlet of the air conditioner can be effectively avoided,
in any of the above embodiments, the indoor unit includes an indoor fan.
The working condition parameters comprise outdoor environment temperature, indoor environment temperature and running power of the indoor fan.
The working condition parameters comprise the following parameters within the set parameter range:
the indoor ambient temperature is in the second set temperature range, and/or
The outdoor ambient temperature is in a third set temperature range, and/or
The operating power is within the set power range.
In this embodiment, the operating parameters include an outdoor ambient temperature of an environment where the indoor unit is located, an indoor ambient temperature, and an operating power of the indoor fan.
And when the outdoor environment temperature and the indoor environment temperature are detected to be in a third set temperature range and a second set temperature range respectively, and the operating power of the fan of the indoor unit is in a set power range, judging that the indoor unit has the risk of condensation.
The operation power of the indoor unit fan is within a set power range, namely the wind speed output by the indoor unit fan is less than or equal to 20%, and the wind speed of the indoor unit fan is less than or equal to 20%, so that air with low temperature cannot be rapidly conveyed out of the indoor unit, namely the stay time of the air with low temperature at the air outlet of the indoor unit is long, and the possibility of condensation of the air outlet of the indoor unit is increased.
Example three:
as shown in fig. 6, a third embodiment of the present invention provides a control device 600 for an air conditioner.
The air conditioner is a multi-split air conditioner and comprises at least two indoor units and an outdoor unit.
The outdoor unit comprises a refrigerant pipeline and a compressor, wherein the first end of the refrigerant pipeline is connected with an exhaust port of the compressor, and the second end of the refrigerant pipeline is connected with a return air port of the compressor.
The control device 600 of the air conditioner specifically includes:
a first control unit 602 for controlling the air conditioner to operate in a set cooling mode;
a determining unit 604 for acquiring an operation frequency of the compressor and the number of the operated indoor units;
the second control unit 606 is configured to control the refrigerant flow rate in the refrigerant pipeline according to the operation frequency and the number of the operating indoor units.
Wherein the number of the units is more than or equal to 1
The control device 600 of the air conditioner according to the present embodiment is used to control a multi-split air conditioner. The multi-split air conditioner comprises at least two indoor units and an outdoor unit, wherein each indoor unit of the at least two indoor units is provided with an indoor heat exchanger, and a compressor, an outdoor heat exchanger and a refrigerant pipeline are arranged in the outdoor unit. The indoor heat exchanger, the compressor and the outdoor heat exchanger form a refrigerant loop. Under the condition that the air conditioner operates in a refrigeration mode, refrigerant output by an exhaust port of the compressor flows through the outdoor heat exchanger and the indoor heat exchanger to exchange heat, and then flows back into the compressor through a return air port of the compressor. The first end of the refrigerant pipeline is connected to the exhaust port of the compressor, and the second end of the refrigerant pipeline is connected to the return air port of the compressor. When the refrigerant pipeline is in a conducting state, part of high-temperature and high-pressure refrigerant discharged by the compressor through the exhaust port directly flows back to the air return port of the compressor through the refrigerant pipeline, the amount of the refrigerant entering a refrigerant loop is reduced, the amount of the refrigerant flowing through the indoor heat exchanger is reduced, and condensation at the air outlet of the indoor unit caused by too low temperature of the indoor heat exchanger is avoided.
And controlling the multi-split air conditioner to operate in a set refrigeration mode, and enabling a low-temperature refrigerant to enter the indoor heat exchanger for evaporation. The method comprises the steps of obtaining the number of running indoor units in the multi-split air conditioner and the running frequency of compressors in the outdoor units, judging the refrigerating capacity of a refrigerant entering an indoor heat exchanger of the running indoor unit according to the running frequency and the number of the running indoor units, and judging whether the risk of condensation generation exists at an air outlet of the indoor unit according to the determined refrigerating capacity of the refrigerant in the indoor heat exchanger of each indoor unit.
It can be understood that, during the operation of the cooling mode, at least one indoor unit of the multi-split air conditioner is in an operating state.
When the operation frequency of the compressor is detected to be within the set range and the number of the operating indoor units is small, the refrigerating capacity of the indoor heat exchanger of each indoor unit is judged to be too high, and then the probability that the air outlet of the operating indoor unit generates condensation is judged to be high. And if the operation frequency of the compressor is not in the set range or the number of the operated indoor units is large, judging that the refrigerating capacity of the indoor heat exchanger of each indoor unit is not too high, namely judging that the probability of generating condensation at the air outlet of the operated indoor unit is low.
Under the condition that the probability that condensation is generated at the air outlet of the indoor unit is determined to be high, the refrigerant pipeline is controlled to be in a conducting state, part of the refrigerant output by the air outlet of the compressor is directly guided to the air return port of the compressor according to the set flow, the amount of the refrigerant flowing through the indoor heat exchanger is reduced, the refrigerating capacity of the indoor heat exchanger is reduced, condensation generated at the air outlet of the indoor unit of the multi-split air conditioner is avoided, and the use experience of a user is improved.
When detecting that there is the condensation risk in the air outlet of the indoor set, directly flow the refrigerant of compressor gas vent output back to the return air inlet of compressor through setting up the refrigerant pipeline, need not to adjust under the condition of compressor operating frequency, reduced the refrigerant volume that the indoor set participated in the heat transfer. When a small number of indoor units in the multi-split air conditioner are in an operating state, the indoor units are prevented from generating condensation.
Example four:
as shown in fig. 7, a fourth embodiment of the present invention provides an air conditioner 700 including:
the outdoor unit comprises an outdoor heat exchanger 704, a compressor 706 and a refrigerant pipeline 708, wherein a first end of the refrigerant pipeline 708 is connected with a discharge port of the compressor 706, and a second end of the refrigerant pipeline 708 is connected with a return air port of the compressor 706;
at least two indoor units, wherein the at least two indoor units are connected with the outdoor unit, and indoor heat exchangers 702 in the at least two indoor units are connected with an outdoor heat exchanger 704 and a compressor 706;
the control device 600 of the air conditioner according to the second aspect is connected to the outdoor unit and the indoor unit.
The air conditioner 700 provided in this embodiment is a multi-split air conditioner 700. The multi-split air conditioner 700 includes at least two indoor units and an outdoor unit, each of the at least two indoor units is provided with an indoor heat exchanger 702, and the outdoor unit is provided with a compressor 706, an outdoor heat exchanger 704 and a refrigerant pipeline 708. The indoor unit heat exchanger, the compressor 706, and the outdoor heat exchanger 704 form a refrigerant circuit. When the air conditioner 700 operates in the cooling mode, the refrigerant output from the discharge port of the compressor 706 flows through the outdoor heat exchanger 704 and the indoor heat exchanger 702 to exchange heat, and then flows back into the compressor 706 through the return port of the compressor 706. A first end of the refrigerant line 708 is coupled to a discharge port of the compressor 706, and a second end of the refrigerant line 708 is coupled to a return port of the compressor 706. When the refrigerant pipe 708 is in a conducting state, a part of the high-temperature and high-pressure refrigerant discharged from the compressor 706 through the air outlet directly flows back to the air return port of the compressor 706 through the refrigerant pipe 708, thereby reducing the amount of the refrigerant entering the refrigerant loop, reducing the amount of the refrigerant flowing through the indoor heat exchanger 702, and avoiding condensation at the air outlet of the indoor unit caused by too low temperature of the indoor heat exchanger 702.
The multi-split air conditioner 700 further includes a control device 600 of the air conditioner, and the control device 600 of the air conditioner is the control device 600 of the air conditioner in the third embodiment, so that all the beneficial technical effects of the control device 600 of the air conditioner in the third embodiment are achieved, and redundant description is not repeated herein.
In any of the above embodiments, the outdoor unit is further provided with an electromagnetic valve 710. The solenoid valve 710 is provided in the refrigerant pipe 708, and the solenoid valve 710 can control the flow rate of the refrigerant in the refrigerant pipe 708.
In this embodiment, the outdoor unit further includes an electromagnetic valve 710 disposed on the refrigerant pipe 708. The solenoid valve 710 is used for controlling the on-off state of the refrigerant pipeline 708. The refrigerant in the refrigerant pipe 708 can flow to the return port of the compressor 706 at a predetermined flow rate by opening and closing the solenoid valve 710 at a predetermined cycle. That is, after the solenoid valve 710 is controlled to be opened for a set period of time, the solenoid valve 710 is controlled to be closed for a set period of time, so that a part of the refrigerant discharged from the discharge port of the compressor 706 directly enters the return port of the compressor 706 through the refrigerant pipe 708.
In some embodiments, the refrigerant flow rate in the refrigerant line 708 is adjusted by controlling the opening of the solenoid valve 710.
In any of the above embodiments, the outdoor unit is further provided with a gas-liquid separator 712. The gas-liquid separator 712 is connected to a return air port of the compressor 706, and a second end of the refrigerant line 708 is connected to the gas-liquid separator 712.
In this embodiment, the high-temperature and high-pressure refrigerant discharged from the discharge port of the compressor 706 is conveyed to the gas-liquid separator 712 through the refrigerant pipe 708, and then flows to the return air port of the compressor 706 through the gas-liquid separator 712, so as to prevent the high-temperature and high-pressure refrigerant at the discharge port from directly impacting the return air port of the compressor 706.
Example five:
as shown in fig. 8, a fifth embodiment of the present invention provides an air conditioner 800 including: a memory 802 and a processor 804.
The memory 802 has programs or instructions stored therein;
the processor 804 executes the program or the instructions stored in the memory 802 to implement the steps of the control method of the air conditioner 800 in any one of the first embodiment and the second embodiment, so that all the beneficial technical effects of the control method of the air conditioner 800 in any one of the first embodiment and the second embodiment are achieved, and redundant description is not repeated herein.
The air conditioner 800 provided by the invention is a multi-split air conditioner 800. The multi-split air conditioner 800 includes at least two indoor units and an outdoor unit, each of the at least two indoor units is provided with an indoor heat exchanger, and the outdoor unit is provided with a compressor, an outdoor heat exchanger and a refrigerant pipeline. The indoor heat exchanger, the compressor and the outdoor heat exchanger form a refrigerant loop. When the air conditioner 800 operates in the cooling mode, the refrigerant output from the discharge port of the compressor flows through the outdoor heat exchanger and the indoor heat exchanger to exchange heat, and then flows back into the compressor through the return port of the compressor. The first end of the refrigerant pipeline is connected to the exhaust port of the compressor, and the second end of the refrigerant pipeline is connected to the return air port of the compressor. When the refrigerant pipeline is in a conducting state, part of high-temperature and high-pressure refrigerant discharged by the compressor through the exhaust port directly flows back to the air return port of the compressor through the refrigerant pipeline, the amount of the refrigerant entering a refrigerant loop is reduced, the amount of the refrigerant flowing through the indoor heat exchanger is reduced, and condensation at the air outlet of the indoor unit caused by too low temperature of the indoor heat exchanger is avoided.
Example six:
in a sixth embodiment of the present invention, there is provided an air conditioner including:
the outdoor unit comprises an indoor free compressor and a refrigerant pipeline, wherein the first end of the refrigerant pipeline is connected with an exhaust port of the compressor, and the second end of the refrigerant pipeline is connected with a return air port of the compressor;
any indoor machine of the at least two indoor machines is connected with the outdoor machine;
the control device is used for controlling the air conditioner to operate in a set refrigeration mode; acquiring the running frequency of a compressor and the number of running indoor units; and controlling the refrigerant flow in the refrigerant pipeline according to the operation frequency and the number of the operated indoor units. Wherein the number of the running indoor units is more than or equal to 1.
The air conditioner provided by the embodiment is a multi-split air conditioner. The multi-split air conditioner comprises at least two indoor units and an outdoor unit, wherein each indoor unit of the at least two indoor units is provided with an indoor heat exchanger, and a compressor, an outdoor heat exchanger and a refrigerant pipeline are arranged in the outdoor unit. The indoor heat exchanger, the compressor and the outdoor heat exchanger form a refrigerant loop. Under the condition that the air conditioner operates in a refrigeration mode, refrigerant output by an exhaust port of the compressor flows through the outdoor heat exchanger and the indoor heat exchanger to complete heat exchange, and then flows back into the compressor through a return air port of the compressor. The first end of the refrigerant pipeline is connected to the exhaust port of the compressor, and the second end of the refrigerant pipeline is connected to the return air port of the compressor. When the refrigerant pipeline is in a conducting state, part of high-temperature and high-pressure refrigerant discharged by the compressor through the exhaust port directly flows back to the air return port of the compressor through the refrigerant pipeline, the amount of the refrigerant entering a refrigerant loop is reduced, the amount of the refrigerant flowing through the indoor heat exchanger is reduced, and condensation at the air outlet of the indoor unit caused by too low temperature of the indoor heat exchanger is avoided.
And controlling the multi-split air conditioner to operate in a set refrigeration mode, and enabling a low-temperature refrigerant to enter the indoor heat exchanger for evaporation. The method comprises the steps of obtaining the number of running indoor units in the multi-split air conditioner and the running frequency of compressors in the outdoor units, judging the refrigerating capacity of a refrigerant entering an indoor heat exchanger of the running indoor units according to the running frequency and the number of the running indoor units, and judging whether the risk of condensation generation exists at an air outlet of each indoor unit according to the determined refrigerating capacity of the refrigerant in the indoor heat exchanger of each indoor unit.
It can be understood that, during the operation of the cooling mode, at least one indoor unit of the multi-split air conditioner is in an operating state.
When the operation frequency of the compressor is detected to be within the set range and the number of the operating indoor units is small, the refrigerating capacity of the indoor heat exchanger of each indoor unit is judged to be too high, and then the probability that the air outlet of the operating indoor unit generates condensation is judged to be high. And if the operation frequency of the compressor is not in the set range or the number of the operated indoor units is large, judging that the refrigerating capacity of the indoor heat exchanger of each indoor unit is not too high, namely judging that the probability of generating condensation at the air outlet of the operated indoor unit is low. Under the condition that the probability that condensation is generated at the air outlet of the indoor unit is determined to be high, the refrigerant pipeline is controlled to be in a conducting state, part of the refrigerant output by the air outlet of the compressor is directly guided to the air return port of the compressor according to the set flow, the amount of the refrigerant flowing through the indoor heat exchanger is reduced, the refrigerating capacity of the indoor heat exchanger is reduced, condensation generated at the air outlet of the indoor unit of the multi-split air conditioner is avoided, and the use experience of a user is improved.
When the condensation risk of the air outlet of the indoor unit is detected, the refrigerant output from the air outlet of the compressor is directly guided back to the air return port of the compressor by arranging the refrigerant pipeline, and the amount of the refrigerant participating in heat exchange of the indoor unit is reduced under the condition that the operation frequency of the compressor does not need to be adjusted. When a small number of indoor units in the multi-split air conditioner are in an operating state, the indoor units are prevented from generating condensation.
In any of the above embodiments, the outdoor unit further includes an electromagnetic valve. The solenoid valve is arranged on the refrigerant pipeline and can control the refrigerant flow in the refrigerant pipeline.
In this embodiment, the outdoor unit further includes an electromagnetic valve disposed on the refrigerant pipeline. The electromagnetic valve is used for controlling the on-off state of the refrigerant pipeline. The electromagnetic valve is controlled to perform switching according to a set period, so that the refrigerant in the refrigerant pipeline can flow to the return air port of the compressor according to a set flow rate. After the electromagnetic valve is controlled to be opened for a set time, the electromagnetic valve is controlled to be closed for a set time, so that part of the refrigerant discharged from the exhaust port of the compressor directly enters the return air port of the compressor through the refrigerant pipeline.
In some embodiments, the refrigerant flow rate in the refrigerant pipeline is adjusted by controlling the opening degree of the electromagnetic valve.
In any of the above embodiments, the outdoor unit further includes a gas-liquid separator. The gas-liquid separator is connected with the air return port of the compressor, and the second end of the refrigerant pipeline is connected with the gas-liquid separator.
In this embodiment, the high-temperature and high-pressure refrigerant discharged from the discharge port of the compressor is conveyed to the gas-liquid separator through the refrigerant pipeline, and then flows to the return port of the compressor through the gas-liquid separator, so as to prevent the high-temperature and high-pressure refrigerant at the discharge port from directly impacting the return port of the compressor.
Example seven:
a seventh embodiment of the present invention provides a readable storage medium having stored thereon a program which, when executed by a processor, implements the control method of the air conditioner as in any of the above embodiments, thereby having all the advantageous technical effects of the control method of the air conditioner as in any of the above embodiments.
The readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It is to be understood that, in the claims, the specification and the drawings of the specification of the present invention, the term "plurality" means two or more, unless explicitly defined otherwise, the terms "upper", "lower" and the like indicate orientations or positional relationships based on those shown in the drawings, and are used only for the purpose of describing the present invention more conveniently and simplifying the description, and are not used to indicate or imply that the device or element referred to must have the specific orientation described, be constructed in a specific orientation, and be operated, and thus the description should not be construed as limiting the present invention; the terms "connect," "mount," "secure," and the like are to be construed broadly, and for example, "connect" may refer to a fixed connection between multiple objects, a removable connection between multiple objects, or an integral connection; the multiple objects may be directly connected to each other or indirectly connected to each other through an intermediate. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art from the above data specifically.
In the claims, specification, and drawings that follow the present disclosure, the description of the terms "one embodiment," "some embodiments," "specific embodiments," and so forth, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In the claims, specification and drawings of the present invention, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The present invention has been described in terms of the preferred embodiment, and it is not intended to be limited to the embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (15)

1. The control method of the air conditioner is characterized in that the air conditioner comprises an outdoor unit and at least two indoor units, the outdoor unit comprises a compressor and a refrigerant pipeline, one end of the refrigerant pipeline is connected with an exhaust port of the compressor, the other end of the refrigerant pipeline is connected with a return air port of the compressor, and the control method comprises the following steps:
controlling the air conditioner to operate in a set refrigeration mode;
determining the number of the indoor units in operation and the operation frequency of the compressor;
controlling the refrigerant flow in the refrigerant pipeline according to the number of the indoor units in the running state and the running frequency;
wherein the number is greater than or equal to 1;
the step of controlling the refrigerant flow in the refrigerant pipeline according to the number of the indoor units in the running state and the running frequency specifically comprises the following steps:
controlling the refrigerant in the refrigerant pipeline to flow to a return air port of the compressor according to a set flow rate based on that the number of the indoor units in the running state is smaller than a set number and the running frequency of the compressor is smaller than a set running frequency;
timing a first duration of the refrigerant pipeline in a conducting state;
and controlling the refrigerant pipeline to be in a broken circuit state based on the fact that the first duration reaches a first duration and/or the number of the indoor units in the running state is larger than or equal to a set number, and returning to execute the step of controlling the air conditioner to run in a set refrigeration mode.
2. The control method of an air conditioner according to claim 1, wherein the set number is 2.
3. The method as claimed in claim 1, wherein the outdoor unit further includes an electromagnetic valve disposed in the refrigerant pipeline, and the step of controlling the refrigerant in the refrigerant pipeline to flow to the return air port of the compressor at a predetermined flow rate includes:
the solenoid valve is controlled to switch the open/close state at a set period.
4. The control method of an air conditioner according to claim 3,
the value range of the set period is 5 minutes to 20 minutes.
5. The method according to any one of claims 1 to 4, wherein the step of controlling the air conditioner to operate in a cooling mode includes:
responding to a refrigerating operation instruction, and controlling the air conditioner to start to operate;
and acquiring working condition parameters of the air conditioner, and adjusting the temperature of a target heat exchanger of the indoor unit according to the relation between the working condition parameters and a set parameter range.
6. The method according to claim 5, wherein the step of adjusting the temperature of the target heat exchanger of the air conditioner according to the relationship between the operating condition parameter and the set parameter range specifically comprises:
timing a second duration of the working condition parameter within the set parameter range;
controlling the air conditioner to operate according to the first target heat exchanger temperature of the indoor unit based on the second duration reaching a second duration;
and controlling the air conditioner to operate according to the temperature of a second target heat exchanger of the indoor unit based on the condition parameter being out of the set range or the second duration not reaching the second duration.
7. The control method of an air conditioner according to claim 6,
the first target heat exchanger temperature is higher than the second target heat exchanger temperature.
8. The method of claim 6, wherein the indoor unit includes an indoor fan, the operating parameters include an indoor ambient temperature, an outdoor ambient temperature, and an operating power of the indoor fan, and the operating parameters within the set parameter range include:
the indoor environment temperature is in a second set temperature range, and/or the outdoor environment temperature is in a third set temperature range, and/or the operation power is in a set power range.
9. The utility model provides a controlling means of air conditioner, its characterized in that, the air conditioner includes off-premises station and two at least indoor units, the off-premises station includes compressor and refrigerant pipeline, the one end of refrigerant pipeline with the gas vent of compressor links to each other, the other end of refrigerant pipeline with the return-air inlet of compressor links to each other, controlling means includes:
the first control unit is used for controlling the air conditioner to operate in a set refrigeration mode;
a determining unit for determining the number of the indoor units in an operating state and an operating frequency of the compressor;
the second control unit is used for controlling the refrigerant flow in the refrigerant pipeline according to the number of the indoor units in the running state and the running frequency;
wherein the number is greater than or equal to 1;
the step of controlling the refrigerant flow in the refrigerant pipeline according to the number of the indoor units in the running state and the running frequency specifically comprises the following steps:
controlling the refrigerant in the refrigerant pipeline to flow to a return air port of the compressor according to a set flow rate based on that the number of the indoor units in the running state is smaller than a set number and the running frequency of the compressor is smaller than a set running frequency;
timing a first duration of the refrigerant pipeline in a conducting state;
and controlling the refrigerant pipeline to be in a broken circuit state based on the fact that the first duration reaches a first duration and/or the number of the indoor units in the running state is larger than or equal to a set number, and returning to execute the step of controlling the air conditioner to run in a set refrigeration mode.
10. An air conditioner, comprising:
the outdoor unit comprises a compressor and a refrigerant pipeline, wherein a first end of the refrigerant pipeline is connected with an exhaust port of the compressor, and a second end of the refrigerant pipeline is connected with a return air port of the compressor;
at least two indoor units connected with the outdoor unit;
the control device of an air conditioner according to claim 9, being connected to the outdoor unit and the indoor unit.
11. An air conditioner, comprising:
a memory having a program or instructions stored therein;
a processor executing a program or instructions stored in the memory to implement the steps of the control method of the air conditioner according to any one of claims 1 to 8.
12. An air conditioner, comprising:
the outdoor unit comprises a compressor and a refrigerant pipeline, wherein a first end of the refrigerant pipeline is connected with an exhaust port of the compressor, and a second end of the refrigerant pipeline is connected with a return air port of the compressor;
at least two indoor units connected with the outdoor unit;
a control device for controlling the air conditioner to operate in a cooling mode; determining the number of the indoor units in operation and the operation frequency of the compressor; controlling the refrigerant flow in the refrigerant pipeline according to the number of the indoor units in the running state and the running frequency; wherein the number is greater than or equal to 1;
the step of controlling the refrigerant flow in the refrigerant pipeline according to the number of the indoor units in the running state and the running frequency specifically comprises the following steps:
controlling the refrigerant in the refrigerant pipeline to flow to a return air port of the compressor according to a set flow rate based on that the number of the indoor units in the running state is smaller than a set number and the running frequency of the compressor is smaller than a set running frequency;
timing a first duration of the refrigerant pipeline in a conducting state;
and controlling the refrigerant pipeline to be in a broken circuit state based on the fact that the first duration reaches a first duration and/or the number of the indoor units in the running state is larger than or equal to a set number, and returning to execute the step of controlling the air conditioner to run in a set refrigeration mode.
13. The outdoor unit of claim 12, further comprising:
and the electromagnetic valve is arranged on the refrigerant pipeline and used for controlling the refrigerant flow in the refrigerant pipeline.
14. The outdoor unit of claim 12, further comprising:
and the gas-liquid separator is connected with the air return port of the compressor, and the second end of the refrigerant pipeline is connected with the gas-liquid separator.
15. A readable storage medium, characterized in that it stores thereon a program or instructions which, when executed by a processor, implement the steps of the control method of an air conditioner according to any one of claims 1 to 8.
CN202110873789.1A 2021-07-30 2021-07-30 Control method and control device of air conditioner, air conditioner and readable storage medium Active CN113654263B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110873789.1A CN113654263B (en) 2021-07-30 2021-07-30 Control method and control device of air conditioner, air conditioner and readable storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110873789.1A CN113654263B (en) 2021-07-30 2021-07-30 Control method and control device of air conditioner, air conditioner and readable storage medium

Publications (2)

Publication Number Publication Date
CN113654263A CN113654263A (en) 2021-11-16
CN113654263B true CN113654263B (en) 2022-10-21

Family

ID=78490225

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110873789.1A Active CN113654263B (en) 2021-07-30 2021-07-30 Control method and control device of air conditioner, air conditioner and readable storage medium

Country Status (1)

Country Link
CN (1) CN113654263B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000046401A (en) * 1998-07-28 2000-02-18 Daikin Ind Ltd Multiple type air conditioner
CN103486692A (en) * 2013-09-17 2014-01-01 青岛海信日立空调系统有限公司 Load self-adaptation variable-frequency multi-connection heat pump system and method for controlling compressor frequency
CN105627612A (en) * 2016-01-04 2016-06-01 广东美的暖通设备有限公司 Outdoor unit refrigerant pipeline system, air conditioner and refrigeration control method for air conditioner
CN111023270A (en) * 2019-12-31 2020-04-17 宁波奥克斯电气股份有限公司 Control method and device of electronic expansion valve, air conditioner and storage medium
CN112880144A (en) * 2021-01-29 2021-06-01 青岛海尔智能技术研发有限公司 Control method and control device for double-refrigeration type air conditioner and double-refrigeration type air conditioner

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000046401A (en) * 1998-07-28 2000-02-18 Daikin Ind Ltd Multiple type air conditioner
CN103486692A (en) * 2013-09-17 2014-01-01 青岛海信日立空调系统有限公司 Load self-adaptation variable-frequency multi-connection heat pump system and method for controlling compressor frequency
CN105627612A (en) * 2016-01-04 2016-06-01 广东美的暖通设备有限公司 Outdoor unit refrigerant pipeline system, air conditioner and refrigeration control method for air conditioner
CN111023270A (en) * 2019-12-31 2020-04-17 宁波奥克斯电气股份有限公司 Control method and device of electronic expansion valve, air conditioner and storage medium
CN112880144A (en) * 2021-01-29 2021-06-01 青岛海尔智能技术研发有限公司 Control method and control device for double-refrigeration type air conditioner and double-refrigeration type air conditioner

Also Published As

Publication number Publication date
CN113654263A (en) 2021-11-16

Similar Documents

Publication Publication Date Title
US11371764B2 (en) Air conditioning system and control method thereof
CN102628630B (en) Control method of air-cooling water chiller unit
CN112283993B (en) Refrigeration control method and device and refrigeration equipment
CN111207485B (en) Anti-freezing control method and device, storage medium and water multi-connected system
CN110940061A (en) Central air conditioner control method and system
CN113639442A (en) Air conditioning system and air conditioning control method
CN113251500A (en) Air conditioner outdoor unit, air conditioner control method, air conditioner control device, air conditioner control equipment and medium
CN108592297B (en) Defrosting control method for air conditioner
CN114234468A (en) Heat pump device control method, device, unit, computer equipment and storage medium
CN112303813B (en) Air conditioner and air conditioner defrosting method
CN113654263B (en) Control method and control device of air conditioner, air conditioner and readable storage medium
CN110006193B (en) Air conditioning system and compressor oil temperature adjusting device used by same
CN114322220B (en) Air conditioning device and control method thereof
CN214841771U (en) Air source heat pump unit system
CN114893861A (en) Air conditioner self-cleaning control method and device, air conditioner and storage medium
CN211146702U (en) Air conditioning system
CN114061036A (en) Fresh air fan anti-freezing control method, fresh air fan and computer readable storage medium
CN108195005B (en) Three-pipe water source multi-split air conditioner and control method thereof
CN115127166B (en) Air conditioner energy-saving system, control method thereof and air conditioner
CN217031657U (en) Air conditioning unit
CN216844910U (en) Air conditioner
CN218469276U (en) Outdoor unit and air conditioner
CN115666073A (en) Cooling control method and device and cooling system
CN104456840A (en) Enhanced vapor injection air conditioner and control method thereof
CN115540194A (en) Control method and control device of air conditioner and air conditioner

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant