CN106091235B - The control method and air-conditioner control system of air-conditioning system - Google Patents
The control method and air-conditioner control system of air-conditioning system Download PDFInfo
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- CN106091235B CN106091235B CN201610383036.1A CN201610383036A CN106091235B CN 106091235 B CN106091235 B CN 106091235B CN 201610383036 A CN201610383036 A CN 201610383036A CN 106091235 B CN106091235 B CN 106091235B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- 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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Atmospheric Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Fluid Mechanics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of control method of air-conditioning system, the control method of the air-conditioning system is the following steps are included: start the heating mode of air-conditioning system, and pass through the temperature that temperature sensor detects indoor heat exchanger；Judge whether the temperature of the indoor heat exchanger is greater than or equal to the first predetermined temperature value；If so, the opening degree of the second electric expansion valve of the opening degree, and/or outdoor unit of the first electric expansion valve of the rotation speed of the fan of control outdoor unit, indoor unit, to reduce the upstream pressure of first electric expansion valve.The invention also discloses a kind of air-conditioner control systems.The present invention can avoid being changed the corresponding pipeline of air-conditioning system or component when the refrigerant of air-conditioning system is replaced under the premise of guaranteeing that air-conditioning system operates normally.
Description
Technical field
The present invention relates to refrigeration technology field more particularly to the control methods and air-conditioner control system of a kind of air-conditioning system.
Background technique
Since refrigerant R22 is very big to ozone layer harm, and R410A is a kind of novel environment-friendly refrigerant, it will not be destroyed
Ozone layer, and its operating pressure is 1.6 times or so of common R22 air-conditioning, and refrigeration (warm) efficiency significantly improves, therefore, market
The refrigerant of means for air conditioner gradually replaces with R410A by R22.But for commercial air conditioning system, multiple rooms are installed indoors
Interior machine, these indoor units are usually installed in plenum, if R22 is replaced with R410A, need to change corresponding pipeline
Or component, it is clear that cause to operate it is very troublesome, to reduce user experience.
Above content is only used to facilitate the understanding of the technical scheme, and is not represented and is recognized that above content is existing skill
Art.
Summary of the invention
The main purpose of the present invention is to provide a kind of control method of air-conditioning system and air-conditioner control systems, it is intended to air-conditioning
When the refrigerant of system is replaced, it can be avoided corresponding to air-conditioning system under the premise of guaranteeing that air-conditioning system operates normally
Pipeline or component be changed.
To achieve the above object, the present invention provides a kind of control method of air-conditioning system, comprising the following steps:
Start the heating mode of air-conditioning system, and detects the temperature of indoor heat exchanger by temperature sensor；
Judge whether the temperature of the indoor heat exchanger is greater than or equal to the first predetermined temperature value；
If so, opening degree, and/or the outdoor of the first electric expansion valve of the rotation speed of the fan of control outdoor unit, indoor unit
The opening degree of second electric expansion valve of machine, to reduce the upstream pressure of first electric expansion valve.
Preferably, described if so, the control rotation speed of the fan of outdoor unit, indoor unit the first electric expansion valve opening degree,
And/or the opening degree of the second electric expansion valve of outdoor unit, the step of upstream pressure to reduce by first electric expansion valve
Later further include:
Persistently detect the temperature of the indoor heat exchanger；
When the temperature of the indoor heat exchanger is greater than or equal to the second predetermined temperature value, control compressor is reduced to predetermined
Frequency range.
Preferably, after the step of control compressor is reduced to scheduled frequency range further include:
Persistently detect the temperature of the indoor heat exchanger；
When the temperature of the indoor heat exchanger is persistently greater than or equal to third predetermined temperature value in the given time, control
The compressor is out of service.
Preferably, described when the temperature of the indoor heat exchanger is persistently greater than or equal to the predetermined temperature of third in the given time
When angle value, after control compressor step out of service further include:
Persistently detect the temperature of the indoor heat exchanger；
When the temperature of the indoor heat exchanger is less than or equal to four predetermined temperature values, then start air-conditioning system operation system
Heat pattern.
Preferably, described if so, the control rotation speed of the fan of outdoor unit, indoor unit the first electric expansion valve opening degree,
And/or the opening degree of the second electric expansion valve of outdoor unit, the step of upstream pressure to reduce by first electric expansion valve
Further comprise:
When the temperature of the indoor heat exchanger is greater than or equal to the first predetermined temperature value, the fan for reducing outdoor unit turns
Speed, the opening degree of the first electric expansion valve in reduction indoor unit, and/or opening for the second electric expansion valve in increase outdoor unit
It is right.
To achieve the above object, the present invention also provides a kind of air-conditioner control system, the air-conditioner control system includes:
Detection module detects indoor heat exchanger for starting the heating mode of air-conditioning system, and by temperature sensor
Temperature；
Judgment module, for judging whether the temperature of the indoor heat exchanger is greater than or equal to the first predetermined temperature value；
Control module, for if so, the control rotation speed of the fan of outdoor unit, indoor unit the first electric expansion valve folding
The opening degree of second electric expansion valve of degree, and/or outdoor unit, to reduce the upstream pressure of first electric expansion valve.
Preferably, the detection module is also used to continue the temperature of the detection indoor heat exchanger；
The control module is also used to when the temperature of the indoor heat exchanger is greater than or equal to the second predetermined temperature value,
Control compressor is reduced to scheduled frequency range.
Preferably, the control module is also used to:
After control compressor is reduced to scheduled frequency range, when the temperature of the indoor heat exchanger is held in the given time
When continuing more than or equal to third predetermined temperature value, then it is out of service to control the compressor.
Preferably, the control module is also used to:
After the compressor is out of service, when the temperature of the indoor heat exchanger is less than or equal to the 4th predetermined temperature value
When, then control the air-conditioning system starting operation heating mode.
Preferably, the control module, is further used for:
When the temperature of the indoor heat exchanger is greater than or equal to the first predetermined temperature value, the fan for reducing outdoor unit turns
Speed, the opening degree of the first electric expansion valve in reduction indoor unit, and/or opening for the second electric expansion valve in increase outdoor unit
It is right.
The control method and air-conditioner control system of air-conditioning system provided by the invention, by the heating for starting air-conditioning system
Mode then using the temperature of temperature sensor detection indoor heat exchanger, and judges whether the temperature of the indoor heat exchanger is big
In or be equal to the first predetermined temperature value, if so, the folding of the first electric expansion valve of the control rotation speed of the fan of outdoor unit, indoor unit
The opening degree of second electric expansion valve of degree, and/or outdoor unit, to reduce the upstream pressure of first electric expansion valve.This
Sample under the premise of guaranteeing that air-conditioning system operates normally, can also avoid pair when the refrigerant of air-conditioning system is replaced
The corresponding pipeline of air-conditioning system or component are changed.
Detailed description of the invention
Fig. 1 is the flow diagram of the control method first embodiment of air-conditioning system of the present invention；
Fig. 2 is the indoor machine structure schematic diagram of air-conditioning system of the present invention；
Fig. 3 is the flow diagram of the control method second embodiment of air-conditioning system of the present invention；
Fig. 4 is the flow diagram of the control method 3rd embodiment of air-conditioning system of the present invention；
Fig. 5 is the flow diagram of the control method fourth embodiment of air-conditioning system of the present invention；
Fig. 6 is the flow diagram of the 5th embodiment of control method of air-conditioning system of the present invention；
Fig. 7 is the functional block diagram of air-conditioner control system first embodiment of the present invention；
Fig. 8 is the functional block diagram of air-conditioner control system second embodiment of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The present invention provides the control method and air-conditioner control system of a kind of air-conditioning system, passes through the refrigerant in air-conditioning system
It replaces, and when air-conditioning system operation heating mode, utilizes temperature sensor timing or the temperature of real-time detection indoor heat exchanger
Degree, and be compared according to the temperature value of detection with predetermined temperature value, finally according to comparison result, execute corresponding step.Such as
This, can be avoided being changed the corresponding pipeline of air-conditioning system or component under the premise of guaranteeing that air-conditioning system operates normally,
So as to reduce operating procedure, user experience is substantially increased.
Referring to Fig.1, in one embodiment, the air-conditioning system control method the following steps are included:
Step S10 starts the heating mode of air-conditioning system；
In the present embodiment, the applicable scene of air-conditioning system are as follows:, still can be when the refrigerant of air-conditioning system is replaced
Under the premise of guaranteeing that air-conditioning system operates normally, avoid being modified indoor unit pipeline or component.Due to still having one in the market
The refrigerant such as R22 that partial air-conditioning uses is very big to ozone layer harm, therefore, it is necessary to which the refrigerant is replaced with environment-friendly type
Refrigerant such as R410A.When being replaced to refrigerant, particular for environment such as megastore, airport or hotels, if corresponding
Change the pipeline or component of indoor unit, the great and operating process that certainly will will cause project amount is complicated, so as to cause manpower and
The waste of material resources.It will be illustrated so that R410A replaces R22 as an example below.
It is indoor machine structure schematic diagram, wherein 101 be electric expansion valve, and 102 be temperature sensor, and 103 are referring to Fig. 2
Fan.When R22 type air-conditioning system is in refrigeration mode, the direction of the electric expansion valve of refrigerant flow through indoor machine is side under
Out.
1.1, when R22 type air-conditioning system replaces with R410A type air-conditioning system, when in refrigeration mode, pressure herein
Generally in 3.3Mpa hereinafter, meeting electronic expansion valve body requirement.
1.2, when R22 type air-conditioning system replaces with R410A type air-conditioning system, when being in heating mode, pressure herein
It is possible that more than 3.3Mpa (corresponding R410A saturation temperature is 53 DEG C or so), therefore, it is necessary to increase to control its pressure, so it is right
The valve body of electric expansion valve is protected.For example, carried out according to indoor heat exchanger middle portion temperature corresponding pressure control outdoor unit/
Indoor unit valve body opening size or compressor frequency size or outer machine rotation speed of fan size.
Therefore, present invention is generally directed to the heating modes of air-conditioning system, and correspond to the operation program under the mode
Adjustment control.
Step S20, the temperature of indoor heat exchanger is detected by temperature sensor, and judges the temperature of the indoor heat exchanger
Whether the first predetermined temperature value is greater than or equal to；
In the present embodiment, temperature sensor is located substantially at the coil pipe medium position of indoor heat exchanger, more accurately to detect
The temperature of indoor heat exchanger.Due to present invention is generally directed to be the environment such as megastore, airport or hotel, Ke Yiding
When or any indoor heat exchanger of real-time detection temperature TA, and judge whether TA is greater than or equal to the first predetermined temperature value such as 48
℃.It is of course also possible to select the temperature of any two or multiple indoor heat exchangers, and it is averaged to obtain TA.It is understood that
It is that the first predetermined temperature value is not limited in the present embodiment, in other embodiments, is joined according to the configuration of different air-conditioning systems
Number has different temperature values.
Step S30, if so, the opening degree of the first electric expansion valve of the control rotation speed of the fan of outdoor unit, indoor unit and/
Or the opening degree of the second electric expansion valve of outdoor unit, to reduce the upstream pressure of first electric expansion valve.
Following steps specifically can be performed:
Step S301 reduces the rotation speed of the fan of outdoor unit；Or
Step S302 reduces the opening degree of the first electric expansion valve in indoor unit；Or
Step S303 increases the opening degree of the second electric expansion valve in outdoor unit；Or
The above combination of any two steps or the combination of three kinds of steps.
In the first embodiment, it when the temperature of indoor heat exchanger is greater than or equal to the first predetermined temperature value, can choose
Step S301, one of S302, S303 are independently executed.
Specifically, the first predetermined temperature value of T1=TA- can be set, when 0 T1≤1 DEG C <, then selects the wind for reducing outdoor unit
Fan revolving speed.If the fan of outdoor unit is equipped with 5 gears, when the fan gear before adjustment is 2 grades, it can be down to 1 grade, or work as
Fan gear before adjustment is 3 grades, then can be down to 2 grades etc..
When 1 T1≤2 DEG C <, then the opening degree for reducing the first electric expansion valve in indoor unit is selected, such as 8 step of total step number,
Then turn down 1 step.Certainly, total step number is not limited to illustrate, and can also be 16 steps, 40 steps etc..
When 2 T1≤3 DEG C <, then the opening degree for increasing the second electric expansion valve in outdoor unit is selected, such as 8 step of total step number,
Then open 2 steps.Certainly, total step number is not limited to illustrate, and can also be 16 steps, 40 steps etc..
In a second embodiment, it when the temperature of indoor heat exchanger is greater than or equal to the first predetermined temperature value, can choose
Step S301, two kinds of composition independencies in S302, S303 execute.
When 3 DEG C of T1≤6 DEG C <, then selection is performed simultaneously step S301, S302.Fan gear is such as reduced to 1 grade from 4 grades
Or 0 grade, while reducing the opening degree (such as 8 step of total step number, turn down 1 step) of the first electric expansion valve of indoor unit.Certainly, total step number
It is not limited to illustrate, can also be 16 steps, 40 steps etc..
In the third embodiment, it when the temperature of indoor heat exchanger is greater than or equal to the first predetermined temperature value, can choose
Step S301, three kinds of combinations in S302, S303 execute.
When 6 DEG C of T1 >, then selection is performed simultaneously step S301, S302, S303.Fan gear is such as down to 0 grade from 4 grades,
Reduce the opening degree (such as 8 step of total step number, turn down 2 steps) of the first electric expansion valve of indoor unit simultaneously, and increases in outdoor unit
The opening degree (such as 8 step of total step number, open 2 steps) of the second electric expansion valve etc..
It should be understood that the specific value of above-mentioned temperature value is only limitted to the understanding of scheme, it is not limited to the number enumerated
Value.
Then the control method of air-conditioning system provided by the invention utilizes temperature by starting the heating mode of air-conditioning system
The temperature of sensor detection indoor heat exchanger is spent, and it is predetermined to judge whether the temperature of the indoor heat exchanger is greater than or equal to first
Temperature value, if so, the opening degree of the first electric expansion valve of the control rotation speed of the fan of outdoor unit, indoor unit, and/or outdoor unit
The opening degree of second electric expansion valve, to reduce the upstream pressure of first electric expansion valve.In this way, can be in air-conditioning system
Refrigerant when replacing, under the premise of guaranteeing that air-conditioning system operates normally, can also avoid to the corresponding pipe of air-conditioning system
Road or component are changed.
In one embodiment, as shown in figure 3, on the basis of above-mentioned shown in FIG. 1, after the step S30 further include:
Step S40, persistently detects the temperature of the indoor heat exchanger, and judges whether the temperature of the indoor heat exchanger is big
In or equal to the second predetermined temperature value；
In the present embodiment, after executing step S30, also timing or the temperature of any indoor heat exchanger can be persistently detected
TA, and judge whether TA is greater than or equal to such as 50 DEG C of the second predetermined temperature value.It is of course also possible to select any two or multiple rooms
The temperature of interior heat exchanger, and be averaged to obtain TA.It is understood that the second predetermined temperature value is not limited in this implementation
Example according to the configuration parameter of different air-conditioning systems, has different temperature values in other embodiments.
Step S50, if so, control compressor is reduced to scheduled frequency range.
In the present embodiment, the scheduled frequency range can be 20~80Hz, can be selected according to specific temperature value
It selects, such as:
The second predetermined temperature value of T2=TA- can be set, when 0 T2≤2 DEG C <, then selects to reduce compressor operation frequency as dropped
Low 20Hz；When 2 T2≤6 DEG C <, then selecting, which reduces compressor operation frequency, such as reduces 30Hz；When T2 be greater than 6 DEG C, then select to reduce
Compressor operation frequency such as reduces 40Hz.
It should be understood that the specific value of above-mentioned temperature value is only limitted to the understanding of scheme, it is not limited to the number enumerated
Value.
In one embodiment, as shown in figure 4, on the basis of above-mentioned shown in Fig. 3, after the step S50 further include:
Step S60, persistently detects the temperature of the indoor heat exchanger, and judge the indoor heat exchanger temperature whether
Persistently it is greater than or equal to third predetermined temperature value in predetermined time；
In the present embodiment, after executing step S50, also timing or the temperature of any indoor heat exchanger can be persistently detected
TA, and judge whether TA is greater than or equal to such as 52 DEG C of third predetermined temperature value.It is of course also possible to select any two or multiple rooms
The temperature of interior heat exchanger, and be averaged to obtain TA.It is understood that third predetermined temperature value is not limited in this implementation
Example according to the configuration parameter of different air-conditioning systems, has different temperature values in other embodiments.Wherein, the predetermined time can
With in 5~10S, other embodiments can reasonably select the time.
Step S70, if so, control compressor is out of service.
In the present embodiment, due to being handled by above-mentioned steps, if still cannot cool the temperature in safe range
Words, if if then showing that air-conditioning system continues to run, may result in air-conditioning system exception, to influence the normal of air-conditioning system
Performance, therefore, it is necessary to shut down processing.
In one embodiment, described if so, also being wrapped after step S70 as shown in figure 5, on the basis of above-mentioned shown in Fig. 4
It includes:
Step S80, persistently detects the temperature of the indoor heat exchanger, and judge the indoor heat exchanger temperature whether
Less than or equal to the 4th predetermined temperature value；
In the present embodiment, when air-conditioning system carries out shutting down processing a period of time, such as 10min~30min, then timing or lasting
The temperature TA of indoor heat exchanger is detected, and judges whether TA is less than or equal to such as 44 DEG C of the 4th predetermined temperature value.It is of course also possible to
The temperature of any two or multiple indoor heat exchangers is selected, and is averaged to obtain TA.It is understood that the 4th predetermined temperature
Value is not limited in the present embodiment, in other embodiments, according to the configuration parameter of different air-conditioning systems, has different temperature
Value.
Step S90, if so, starting air-conditioning system runs heating mode.
In the present embodiment, if the 4th predetermined temperature value of TA <, show that air-conditioning system is recovered normal, at this point, can
It is heated with restarting heating mode.
In one embodiment, as shown in fig. 6, on the basis of above-mentioned shown in fig. 5, after the step S20 further include:
Step S100, if it is not, then executing the normal operation program of air-conditioning system.
In the present embodiment, above includes multiple judgment steps, when the judgement result that any judgment step obtains is negates,
It then controls air-conditioning system and executes normal common operation program.
It should be understood that the size relation of the first, second, third and fourth predetermined temperature value is as follows in the present invention:
4th predetermined temperature value < the first predetermined temperature value < the second predetermined temperature value < third predetermined temperature value, in this way,
It, can be than accurately controlling air-conditioning system, to guarantee in air-conditioning system by gradually incremental temperature gradient detection
Refrigerant when replacing, can also air-conditioning system be made to operate normally, to avoid to the corresponding pipeline of air-conditioning system or component
Carry out variation processing.
The present invention also provides a kind of air-conditioner control systems 1, referring to Fig. 7, in one embodiment, the air-conditioner control system 1
Include:
Starting module 10, for starting the heating mode of air-conditioning system；
In the present embodiment, the applicable scene of air-conditioning system are as follows:, still can be when the refrigerant of air-conditioning system is replaced
Under the premise of guaranteeing that air-conditioning system operates normally, avoid being modified indoor unit pipeline or component.Due to still having one in the market
The refrigerant such as R22 that partial air-conditioning uses is very big to ozone layer harm, therefore, it is necessary to which the refrigerant is replaced with environment-friendly type
Refrigerant such as R410A.When being replaced to refrigerant, particular for environment such as megastore, airport or hotels, if corresponding
Change the pipeline or component of indoor unit, the great and operating process that certainly will will cause project amount is complicated, so as to cause manpower and
The waste of material resources.It will be illustrated so that R410A replaces R22 as an example below.
It is indoor machine structure schematic diagram, wherein 101 be electric expansion valve, and 102 be temperature sensor, and 103 are referring to Fig. 2
Fan.When R22 type air-conditioning system is in refrigeration mode, the direction of the electric expansion valve of refrigerant flow through indoor machine is side under
Out.
1.1, when R22 type air-conditioning system replaces with R410A type air-conditioning system, when in refrigeration mode, pressure herein
Generally in 3.3Mpa hereinafter, meeting electronic expansion valve body requirement.
1.2, when R22 type air-conditioning system replaces with R410A type air-conditioning system, when being in heating mode, pressure herein
It is possible that more than 3.3Mpa (corresponding R410A saturation temperature is 53 DEG C or so), therefore, it is necessary to increase to control its pressure, so it is right
The valve body of electric expansion valve is protected.For example, carried out according to indoor heat exchanger middle portion temperature corresponding pressure control outdoor unit/
Indoor unit valve body opening size or compressor frequency size or outer machine rotation speed of fan size.
Therefore, present invention is generally directed to the heating modes of air-conditioning system, and correspond to the operation program under the mode
Adjustment control.
Detection module 20, for detecting the temperature of indoor heat exchanger by temperature sensor；
Judgment module 30, judges whether the temperature of the indoor heat exchanger is greater than or equal to the first predetermined temperature value；
In the present embodiment, temperature sensor is located substantially at the coil pipe medium position of indoor heat exchanger, more accurately to detect
The temperature of indoor heat exchanger.Due to present invention is generally directed to be the environment such as megastore, airport or hotel, Ke Yiding
When or any indoor heat exchanger of real-time detection temperature TA, and judge whether TA is greater than or equal to the first predetermined temperature value such as 48
℃.It is of course also possible to select the temperature of any two or multiple indoor heat exchangers, and it is averaged to obtain TA.It is understood that
It is that the first predetermined temperature value is not limited in the present embodiment, in other embodiments, is joined according to the configuration of different air-conditioning systems
Number has different temperature values.
Control module 40, for if so, the first electric expansion valve of the control rotation speed of the fan of outdoor unit, indoor unit is opened
The opening degree of right, and/or outdoor unit the second electric expansion valve, to reduce the upstream pressure of first electric expansion valve.
It is specific to execute following steps: step S301, to reduce the rotation speed of the fan of outdoor unit；Or step S302, reduction indoor unit
The opening degree of the first interior electric expansion valve；Or step S303, increase outdoor unit in the second electric expansion valve opening degree；Or
The above combination of any two steps or the combination of three kinds of steps.
In the first embodiment, it when the temperature of indoor heat exchanger is greater than or equal to the first predetermined temperature value, can choose
One of above step independently executes.
Specifically, the first predetermined temperature value of T1=TA- can be set, when 0 T1≤1 DEG C <, then selects the wind for reducing outdoor unit
Fan revolving speed.If the fan of outdoor unit is equipped with 5 gears, when the fan gear before adjustment is 2 grades, it can be down to 1 grade, or work as
Fan gear before adjustment is 3 grades, then can be down to 2 grades etc..
When 1 T1≤2 DEG C <, then the opening degree for reducing the first electric expansion valve in indoor unit is selected, such as 8 step of total step number,
Then turn down 1 step.Certainly, total step number is not limited to illustrate, and can also be 16 steps, 40 steps etc..
When 2 T1≤3 DEG C <, then the opening degree for increasing the second electric expansion valve in outdoor unit is selected, such as 8 step of total step number,
Then open 2 steps.Certainly, total step number is not limited to illustrate, and can also be 16 steps, 40 steps etc..
In a second embodiment, it when the temperature of indoor heat exchanger is greater than or equal to the first predetermined temperature value, can choose
Two kinds of composition independencies in above step execute.
When 3 DEG C of T1≤6 DEG C <, then selection is performed simultaneously step S301, S302.Fan gear is such as reduced to 1 grade from 4 grades
Or 0 grade, while reducing the opening degree (such as 8 step of total step number, turn down 1 step) of the first electric expansion valve of indoor unit.Certainly, total step number
It is not limited to illustrate, can also be 16 steps, 40 steps etc..
In the third embodiment, it when the temperature of indoor heat exchanger is greater than or equal to the first predetermined temperature value, can choose
The combination of three of the above step executes.
When 6 DEG C of T1 >, then selection is performed simultaneously step S301, S302, S303.Fan gear is such as down to 0 grade from 4 grades,
Reduce the opening degree (such as 8 step of total step number, turn down 2 steps) of the first electric expansion valve of indoor unit simultaneously, and increases in outdoor unit
The opening degree (such as 8 step of total step number, open 2 steps) of the second electric expansion valve etc..
It should be understood that the specific value of above-mentioned temperature value is only limitted to the understanding of scheme, it is not limited to the number enumerated
Value.
Then air-conditioner control system 1 provided by the invention utilizes temperature sensing by starting the heating mode of air-conditioning system
Device detects the temperature of indoor heat exchanger, and judges whether the temperature of the indoor heat exchanger is greater than or equal to the first predetermined temperature
Value, if so, the of the opening degree of the first electric expansion valve of the control rotation speed of the fan of outdoor unit, indoor unit, and/or outdoor unit
The opening degree of two electric expansion valves, to reduce the upstream pressure of first electric expansion valve.In this way, can be in air-conditioning system
When refrigerant is replaced, under the premise of guaranteeing that air-conditioning system operates normally, it can also avoid to the corresponding pipeline of air-conditioning system
Or component is changed.
In one embodiment, as shown in fig. 7, the detection module 20, is also used to continue the detection indoor heat exchanger
Temperature；
The control module 30 is also used to be greater than or equal to the second predetermined temperature in the temperature for judging the indoor heat exchanger
When value, control compressor is reduced to scheduled frequency range.
In the present embodiment, control module 30 is executing the rotation speed of the fan of control outdoor unit, the first electronic expansion of indoor unit
It, can also be fixed by detection module 20 after the program of the opening degree of second electric expansion valve of the opening degree, and/or outdoor unit of valve
When or persistently detect the temperature TA of any indoor heat exchanger, and judge whether TA is greater than or equal to the second predetermined temperature value such as 50
℃.It is of course also possible to select the temperature of any two or multiple indoor heat exchangers, and it is averaged to obtain TA.It is understood that
It is that the second predetermined temperature value is not limited in the present embodiment, in other embodiments, is joined according to the configuration of different air-conditioning systems
Number has different temperature values.
In the present embodiment, the scheduled frequency range can be 20~80Hz, can be selected according to specific temperature value
It selects, such as:
The second predetermined temperature value of T2=TA- can be set, when 0 T2≤2 DEG C <, then selects to reduce compressor operation frequency as dropped
Low 20Hz；When 2 T2≤6 DEG C <, then selecting, which reduces compressor operation frequency, such as reduces 30Hz；When T2 be greater than 6 DEG C, then select to reduce
Compressor operation frequency such as reduces 40Hz.
It should be understood that the specific value of above-mentioned temperature value is only limitted to the understanding of scheme, it is not limited to the number enumerated
Value.
In one embodiment, as shown in fig. 7, the control module 40 is also used to, predetermined frequency is reduced in control compressor
After rate range, when the temperature of the indoor heat exchanger is persistently greater than or equal to third predetermined temperature value in the given time, then
It is out of service to control the compressor.
In the present embodiment, after the control compressor of control module 40 is reduced to scheduled frequency range, it can also pass through detection
20 timing of module or the temperature TA for persistently detecting any indoor heat exchanger, and judge whether TA is greater than or equal to third predetermined temperature
Such as 52 DEG C of value.It is of course also possible to select the temperature of any two or multiple indoor heat exchangers, and it is averaged to obtain TA.It can be with
Understand, third predetermined temperature value is not limited in the present embodiment, in other embodiments, according to matching for different air-conditioning systems
Parameter is set, there is different temperature values.Wherein, the predetermined time can be in 5~10S, other embodiments, when can reasonably select
Between.
In the present embodiment, due to being handled by above-mentioned steps, if still cannot cool the temperature in safe range
Words, if if then showing that air-conditioning system continues to run, may result in air-conditioning system exception, to influence the normal of air-conditioning system
Performance, therefore, it is necessary to shut down processing.
In one embodiment, as shown in fig. 7, the control module 30 is also used to:
After the compressor is out of service, when the temperature of the indoor heat exchanger is less than or equal to the 4th predetermined temperature value
When, then start air-conditioning system operation heating mode.
In the present embodiment, when air-conditioning system carries out shutting down processing a period of time, such as 10min~30min, then pass through detection mould
20 timing of block or the temperature TA for persistently detecting indoor heat exchanger, and judge whether TA is less than or equal to the 4th predetermined temperature value such as 44
℃.It is of course also possible to select the temperature of any two or multiple indoor heat exchangers, and it is averaged to obtain TA.It is understood that
It is that the 4th predetermined temperature value is not limited in the present embodiment, in other embodiments, is joined according to the configuration of different air-conditioning systems
Number has different temperature values.
In the present embodiment, if the 4th predetermined temperature value of TA <, show that air-conditioning system is recovered normal, at this point, can
It is heated with restarting heating mode.
In one embodiment, as shown in figure 8, on the basis of above-mentioned shown in Fig. 7, the air-conditioner control system 1 further include:
Processing module 50 is executed, for if it is not, then executing the normal operation program of air-conditioning system.
In the present embodiment, above each judgment module includes multiple judgment steps, when the judgement that any judgment step obtains
When as a result to negate, then controls air-conditioning system and execute normal common operation program.
It should be understood that the size relation of the first, second, third and fourth predetermined temperature value is as follows in the present invention:
4th predetermined temperature value < the first predetermined temperature value < the second predetermined temperature value < third predetermined temperature value, in this way,
It, can be than accurately controlling air-conditioning system, to guarantee in air-conditioning system by gradually incremental temperature gradient detection
Refrigerant when replacing, can also air-conditioning system be made to operate normally, to avoid to the corresponding pipeline of air-conditioning system or component
Carry out variation processing.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (4)
1. a kind of control method of air-conditioning system, which is characterized in that the control method of the air-conditioning system the following steps are included:
Start the heating mode of air-conditioning system, and detects the temperature of indoor heat exchanger by temperature sensor；
Judge whether the temperature of the indoor heat exchanger is greater than or equal to the first predetermined temperature value；
If so, the opening degree, and/or outdoor unit of the first electric expansion valve of the control rotation speed of the fan of outdoor unit, indoor unit
The opening degree of second electric expansion valve, to reduce the upstream pressure of first electric expansion valve；
Persistently detect the temperature of the indoor heat exchanger；
When the temperature of the indoor heat exchanger is greater than or equal to the second predetermined temperature value, control compressor is reduced to preset frequency
Range；
Persistently detect the temperature of the indoor heat exchanger；
When the temperature of the indoor heat exchanger is persistently greater than or equal to third predetermined temperature value in the given time, described in control
Compressor is out of service；
Persistently detect the temperature of the indoor heat exchanger；
When the temperature of the indoor heat exchanger is less than or equal to four predetermined temperature values, then start air-conditioning system operation heating mould
Formula；
Wherein, the first predetermined temperature value of the 4th predetermined temperature value < < the second predetermined temperature value < third predetermined temperature value.
2. the control method of air-conditioning system as described in claim 1, which is characterized in that described if so, controlling the wind of outdoor unit
Fan revolving speed, indoor unit the first electric expansion valve opening degree, and/or outdoor unit the second electric expansion valve opening degree, with
The step of reducing the upstream pressure of first electric expansion valve, further comprises:
When the temperature of the indoor heat exchanger is greater than or equal to the first predetermined temperature value, reduces the rotation speed of the fan of outdoor unit, subtracts
The opening degree of the first electric expansion valve in small indoor unit, and/or the opening degree for increasing the second electric expansion valve in outdoor unit.
3. a kind of air-conditioner control system, which is characterized in that the air-conditioner control system includes:
Detection module for starting the heating mode of air-conditioning system, and passes through the temperature of temperature sensor detection indoor heat exchanger；
Judgment module, for judging whether the temperature of the indoor heat exchanger is greater than or equal to the first predetermined temperature value；
Control module, for if so, the control rotation speed of the fan of outdoor unit, indoor unit the first electric expansion valve opening degree,
And/or the opening degree of the second electric expansion valve of outdoor unit, to reduce the upstream pressure of first electric expansion valve；
The control module is also used to the control when the temperature of the indoor heat exchanger is greater than or equal to the second predetermined temperature value
Compressor is reduced to scheduled frequency range；
The control module is also used to:
After control compressor is reduced to scheduled frequency range, when the temperature of the indoor heat exchanger continues greatly in the given time
When third predetermined temperature value, then it is out of service to control the compressor；
After the compressor is out of service, when the temperature of the indoor heat exchanger is less than or equal to four predetermined temperature values,
Then control the air-conditioning system starting operation heating mode.
4. air-conditioner control system as claimed in claim 3, which is characterized in that the control module is further used for:
When the temperature of the indoor heat exchanger is greater than or equal to the first predetermined temperature value, reduces the rotation speed of the fan of outdoor unit, subtracts
The opening degree of the first electric expansion valve in small indoor unit, and/or the opening degree for increasing the second electric expansion valve in outdoor unit.
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| CN107255306B (en) * | 2017-05-19 | 2023-02-17 | 海信空调有限公司 | Combined variable frequency air conditioner and control method thereof |
| CN107328061B (en) * | 2017-06-30 | 2020-06-23 | 美的集团武汉制冷设备有限公司 | Air conditioning system, heating control method, and computer-readable storage medium |
| CN107940691B (en) * | 2017-11-03 | 2020-04-24 | 广东美的暖通设备有限公司 | Control method and device of air conditioning system and air conditioner |
| CN110810972A (en) * | 2018-08-10 | 2020-02-21 | 青岛海尔空调器有限总公司 | Control method of air conditioning clothes and air conditioning clothes |
| CN110811010A (en) * | 2018-08-10 | 2020-02-21 | 青岛海尔空调器有限总公司 | Control method of air conditioning clothes and air conditioning clothes |
| CN110779176A (en) * | 2019-11-11 | 2020-02-11 | 广东美的制冷设备有限公司 | Electronic equipment, air conditioner and control method and control device of air conditioner |
| CN111706974B (en) * | 2020-06-05 | 2021-12-17 | 美的集团武汉暖通设备有限公司 | Control method of air conditioner, air conditioner and storage medium |
| CN114076391B (en) * | 2020-08-17 | 2022-11-22 | 广东美的制冷设备有限公司 | Multi-split air conditioner, control method thereof, air conditioner control device and readable storage medium |
| CN115654692A (en) * | 2022-11-01 | 2023-01-31 | 青岛海尔空调器有限总公司 | Air conditioner and control method thereof |
| CN115899958A (en) * | 2022-11-25 | 2023-04-04 | 青岛海尔空调器有限总公司 | Control method and device of air conditioner and air conditioner |
| CN115751601A (en) * | 2022-11-25 | 2023-03-07 | 青岛海尔空调器有限总公司 | Control method and device of air conditioner and air conditioner |
| CN115751600A (en) * | 2022-11-25 | 2023-03-07 | 青岛海尔空调器有限总公司 | Control method and device of air conditioner and air conditioner |
| CN115751633A (en) * | 2022-11-25 | 2023-03-07 | 青岛海尔空调器有限总公司 | Control method and device of air conditioner and air conditioner |
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