CN109405177A - Control method, air-conditioning system and the readable storage medium storing program for executing of air-conditioning system - Google Patents
Control method, air-conditioning system and the readable storage medium storing program for executing of air-conditioning system Download PDFInfo
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- CN109405177A CN109405177A CN201811314655.0A CN201811314655A CN109405177A CN 109405177 A CN109405177 A CN 109405177A CN 201811314655 A CN201811314655 A CN 201811314655A CN 109405177 A CN109405177 A CN 109405177A
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- expansion valve
- step number
- air
- conditioning system
- heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
-
- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- 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
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention provides a kind of control method of air-conditioning system and air-conditioning system, method includes: after receiving the expansion valve out code of indoor unit, and control expansion valve is run to closed state；Judge whether the heat exchanger of indoor unit is in operating status；When heat exchanger is in operating status, determine expansion valve closed state failure, expansion valve in off position when with the aperture being not zero.The present invention is judged by the current state of the heat exchanging device after expansion valve is run to closed state, whether fast and effeciently can detecting that expansion valve is shut, and then the bad phenomenons such as expansion valve fails to return liquid caused by effectively shutting, noise, frosting are dripped are avoided the occurrence of, it ensure that the reliability of air-conditioning system.
Description
Technical field
The present invention relates to field of refrigeration equipments, more specifically, are related to the control method of air-conditioning system a kind of, a kind of air-conditioning
System and a kind of computer readable storage medium.
Background technique
Electric expansion valve is as one of four big components within air-conditioning systems, and using relatively broad, importance is self-evident.
And in multi-line system, in each indoor unit, there are respective electric expansion valves, to pass through the electricity closed in different indoor units
Sub- expansion valve realizes the cutting to the indoor unit bulk loop.When electric expansion valve cannot effectively be shut, it will band is back and forth
Liquid, noise, frosting such as are dripped at the bad phenomenons, not only greatly affected the normal use of user, also to the reliable of air-conditioning system
Property with the service life cause huge damage.
Summary of the invention
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
The first aspect of the invention provides a kind of control method of air-conditioning system.
The second aspect of the invention provides a kind of air-conditioning system.
The third aspect of the invention provides a kind of computer readable storage medium.
In view of above-mentioned, a kind of control method of air-conditioning system provided by the invention, the control method of air-conditioning system includes: to work as
After the expansion valve out code for receiving indoor unit, control expansion valve is run to closed state；Judging the heat exchanger of indoor unit is
It is no in operating status；When heat exchanger is in operating status, the closed state failure of expansion valve is determined, expansion valve is closing shape
With the aperture being not zero when state.
In the control method of air-conditioning system provided by the invention, first in the expansion valve out code for receiving indoor unit
Afterwards, i.e., it controls the expansion valve at this time to run to closed state, expansion valve can be closed according to out code, and then detection is indoor
The current state of heat exchanger in machine, and judge whether the heat exchanger in operating status, that is, judge at this time in heat exchanger
Whether the refrigerant in portion is carrying out heat exchange, runs due to having controlled the expansion valve before this to closed state, if the pass of expansion valve
When closed state is effective (expansion valve can effectively be shut), entire circuit is cut off, and heat exchanger then can not heat exchange；Therefore logical
It crosses and judges whether heat exchanger is in operating status, can judge whether expansion valve effectively shuts；Determining result for heat exchange
When device is in operating status, then it can from which further follow that the conclusion of the closed state failure of expansion valve, i.e., receive pass in expansion valve
When closing instruction and being closed, which does not fully control expansion valve and shuts, and expansion valve is only theoretically in closing
State and actually then fail effectively to shut, this result in expansion valve in off position when still there is the aperture being not zero.This hair
The bright current state by the heat exchanging device after expansion valve is run to closed state is judged, can fast and effeciently be detected
Whether expansion valve is shut, and then it is bad to avoid the occurrence of that expansion valve fails to return liquid caused by effectively shutting, noise, frosting are dripped etc.
Phenomenon ensure that the reliability of air-conditioning system.
It is contemplated that ground, air-conditioning system can drag more multi-line systems for one, or the common air-conditioning of one-to-one
Device, can the closed state to the expansion valve in air-conditioning system whether fail and detect.
In addition, the control method for the air-conditioning system that above-mentioned technical proposal provides according to the present invention also has following supplementary technology
Feature:
In any of the above-described technical solution, it is preferable that judge heat exchanger step whether in operating status, comprising: obtain
Take the recuperator inlet temperature T2A and heat exchanger outlet temperature T2B of indoor unit, obtain room temperature T1 locating for indoor unit and/
Or the evaporator refrigerant temperature Te of air-conditioning system, according to the relationship of T2A, T2B, T1 three and/or according to T2A, T2B, Te three's
Relationship judges whether heat exchanger is in operating status.
In the technical scheme, a kind of concrete scheme for judging whether heat exchanger is in operating status is provided, is obtained first
The recuperator inlet temperature T2A and heat exchanger outlet temperature T2B for taking indoor unit, then obtain room temperature locating for indoor unit again
T1 judges whether heat exchanger in operating status according to the relationship of T2A, T2B, T1 three, according to recuperator inlet temperature T2A and
Temperature difference between heat exchanger outlet temperature T2B and room temperature T1, to judge whether heat exchanger is in operating status.
In the technical scheme, it provides another and judges heat exchanger concrete scheme whether in operating status, first
The recuperator inlet temperature T2A and heat exchanger outlet temperature T2B for obtaining indoor unit, then obtain the refrigerant evaporation of air-conditioning system again
Temperature Te judges whether heat exchanger is in operating status according to the relationship of T2A, T2B, Te three, according to recuperator inlet temperature
Temperature difference between T2A and heat exchanger outlet temperature T2B and evaporator refrigerant temperature Te, to judge whether heat exchanger is in operation shape
State.
In any of the above-described technical solution, it is preferable that the control method of air-conditioning system further include: read expansion valve and be in pass
The step number of closed state is the first step number P；The step number for controlling expansion valve promotes the second step number Δ P, so that the step number of expansion valve is by the
One step number P changes to P+ Δ P；The step number that expansion valve is in close state is changed into P+ Δ P by the first step number P.
In the technical scheme, a kind of solution after the closed state for getting expansion valve failure is provided.It is first
The step number that expansion valve is in close state first is read, and it is according to preparatory out code that the step number, which is defined as the first step number P, P,
When closing to expansion valve, expansion valve is in the step number under the closed state, due to passing through expansion valve known to above-mentioned analysis
In the first step number P, do not shut actually, but there is also there is an aperture, therefore the first current step number is also no longer appropriate for
It as the step number of closed state, but needs further to increase the step number of expansion valve, expansion valve is effectively closed
Extremely；Then the step number of control expansion valve promotes the second step number Δ P, and the step that expansion valve is in close state by the first step number P
Number by the first step number P changes to P+ Δ P, i.e., then again when receiving out code, the step number that will control expansion valve is P
+ Δ P, is adjusted by the step number to closed state, it is ensured that expansion valve can be shut when not shutting, be avoided out
Now because of a series of problems caused by cannot shutting expansion valve.
It is contemplated that ground, the second step number Δ P is default value or for user is regulated and controled on the basis of preset numerical value.
In any of the above-described technical solution, it is preferable that the control method of air-conditioning system further include: after being spaced preset duration
It returns to execute and judges heat exchanger step whether in operating status.
It in the technical scheme, can also be to adjusting after the step number of expansion valve is changed to P+ Δ P by the first step number P
Result afterwards is verified, that is, returns to whether rejudge heat exchanger in operating status, and successively again according to abovementioned steps
It is detected, to guarantee that final heat exchanger will not rerun after expansion valve closing.
Further, rejudge heat exchanger it is whether in operating status when, will not be detected immediately, but need
Judged again after the preset duration of interval, duration is spaced by setting, the buffer time of air-conditioning system stable operation can be given, kept away
Exempt to be detected immediately after adjusting step number and leads to the unstable situation of testing result obtained, i.e., it can be with after the preset duration of interval
Guarantee that testing result is more accurate.
In any of the above-described technical solution, it is preferable that read expansion valve be in close state the first step number P the step of it
Afterwards, comprising: the maximum step number Pmax for obtaining expansion valve judges whether Pmax < P+ Δ P is true；When Pmax < P+ Δ P is set up,
The step number of variable expansion valve is maximum step number Pmax；The step number that expansion valve is in close state is changed to most by the first step number P
Big step number Pmax.
In the technical scheme, when needing the step number to expansion valve closing state to be adjusted, it is also necessary to expansion valve
The ability to bear and service life of itself account for, it is therefore desirable to obtain the maximum step number Pmax of expansion valve, the maximum step number
Pmax is the adaptable maximum step number of expansion valve institute under normal circumstances, expansion valve is being adjusted to more than after the step number, may
Ability to bear beyond expansion valve itself influences its service life in turn.Therefore need to judge whether Pmax < P+ Δ P is true, when
When Pmax < P+ Δ P is invalid, illustrates expansion valve will not be made to be more than Pmax by adjusting, can be adjusted at this time.When
When Pmax < P+ Δ P is set up, if illustrating to promote step number Δ P, the step number P+ Δ P of the expansion valve after adjusting can be more than Pmax, and
Normal use is influenced, step number is no longer changed into P+ Δ P by P at this time, but the step number of variable expansion valve is to maximum step number
Pmax, and then the step number that expansion valve is in close state is changed into maximum step number Pmax by the first step number P, it ensure that expansion valve
Safe handling.
In any of the above-described technical solution, it is preferable that read expansion valve be in close state the first step number P the step of it
Afterwards, comprising: the step number for controlling expansion valve reduces third step number P0；The step number of control expansion valve changes to P+ Δ P by P-P0.
In the technical scheme, a kind of concrete scheme of the step number of variable expansion valve is provided, obtains expansion valve in judgement
It when not shutting, can also first be saved to readjustment in the case where current first step number P, i.e., the step number for controlling expansion valve first reduces the
Three step number P0, this is because when the case where expansion valve appearance cannot be shut, it is possible to be expansion valve opening clamping stagnation, Wu Fazai
Continue to shut, it is therefore desirable to first save to readjustment, to attempt the case where solving clamping stagnation；Then again by the step number of expansion valve by P-P0
It is adjusted to P+ Δ P, the practical step number promoted at this time is P0+ Δ P, so that the step number of final expansion valve is P+ Δ P, by being arranged back
The step number P0 of tune solves the problems, such as expansion valve opening clamping stagnation, and ensure that can carry out normal regulating to expansion valve.
In any of the above-described technical solution, it is preferable that according to the relationship of T2A, T2B, T1 and/or T2A, T2B, Te, judgement
Heat exchanger step whether in operating status, comprising: judge whether T1-T2A > a and/or T1-T2B > b is true, wherein a, b
For the preset value greater than zero；When T1-T2A > a and/or T1-T2B > b is set up, determine that heat exchanger is in operating status.
In the technical scheme, the judgement whether in operating status in heat exchanging device, is specifically as follows and judges T1-T2A
Whether > a and/or T1-T2B > b is true, if heat exchanger is in the state of operation, then T1 can be significantly greater than T2A, while T1
Also it is significantly greater than T2B；Therefore when T1-T2A > a and/or T1-T2B > b is set up, then it can be determined that heat exchanger is in operation shape
State.
In any of the above-described technical solution, it is preferable that according to the relationship of T2A, T2B, T1 and/or T2A, T2B, Te, judgement
Heat exchanger step whether in operating status, comprising: judge whether T2A-Te < c and/or T2B-Te < d is true, wherein c, d
For the preset value greater than zero；When T2A-Te < c and/or T2B-Te < d is set up, determine that heat exchanger is in operating status.
In the technical scheme, the judgement whether in operating status in heat exchanging device, judge T2A-Te < c and/or
Whether T2B-Te < d is true, if heat exchanger is in the state of operation, then the difference of T2A and Te can be smaller, T2B and Te's
Difference can be smaller；Therefore when T2A-Te < c and/or T2B-Te < d is set up, then it can be determined that heat exchanger is in operating status.
In any of the above-described technical solution, it is preferable that after receiving the expansion valve out code of indoor unit, control swollen
Before the step of swollen valve is run to closed state, comprising: whether the operational mode for judging air-conditioning system is refrigeration mode or dehumidifying
Mode.
In the technical scheme, state whether mode can effectively shut expansion valve when detecting in use, it is also necessary to
Whether the operational mode for first judging air-conditioning system is refrigeration mode or dehumidification mode, in refrigeration mode and dehumidification mode, is in
The heat exchanger of indoor is evaporator, and indoor is low-temp low-pressure environment at this time, therefore closing expansion valve will not cause circuit
It influences；If the operational mode of air-conditioning system is heating mode, indoor is high temperature and pressure, and closing expansion valve at this time will cause pressure
Power is excessively high and generates security risk, therefore, in order to ensure that the normal operation of air-conditioning system, needs in refrigeration mode or dehumidification mode
Carry out subsequent operation.
In any of the above-described technical solution, it is preferable that when heat exchanger is in operating status, determine the closing of expansion valve
State failure, expansion valve in off position when there is the step of aperture being not zero after, comprising: generate and send expansion valve
Trouble Report.
In the technical scheme, when heat exchanger is in operating status, determine the closed state failure of expansion valve, expansion valve
After there is the step of aperture being not zero when in off position, the Trouble Report of expansion valve can be also generated and sent, so that with
Family or maintenance personal know the failure, to repair after it can not be shut by above-mentioned adjusting realization or more to renew manually in time
Expansion valve.
According to the second aspect of the invention, a kind of air-conditioning system is provided, comprising: it is executable to be configured to storage for memory
Instruction；Processor is configured to execute the instruction of storage to realize such as the step of any of the above-described technical solution method, thus has this
Whole technical effects of the control method of air-conditioning system, details are not described herein.
According to the third aspect of the invention we, a kind of computer readable storage medium is provided, computer journey is stored thereon with
Sequence is realized when computer program is executed by processor such as the step of any of the above-described technical solution method, thus has the air-conditioning system
Whole technical effects of the control method of system, details are not described herein.
Additional aspect and advantage according to the present invention will provide in following description section, partially will be from following description
In become obvious, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 shows a flow diagram of the control method of the air-conditioning system of one embodiment of the present of invention offer；
Fig. 2 shows another process signals of the control method of the air-conditioning system of one embodiment of the present of invention offer
Figure；
Fig. 3 shows another process signal of the control method of the air-conditioning system of one embodiment of the present of invention offer
Figure；
Fig. 4 shows another process signal of the control method of the air-conditioning system of one embodiment of the present of invention offer
Figure；
Fig. 5 shows another process signal of the control method of the air-conditioning system of one embodiment of the present of invention offer
Figure；
Fig. 6 shows another process signal of the control method of the air-conditioning system of one embodiment of the present of invention offer
Figure；
Fig. 7 shows another process signal of the control method of the air-conditioning system of one embodiment of the present of invention offer
Figure；
Fig. 8 shows a structural schematic diagram of the air-conditioning system of one embodiment of the present of invention offer.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
Implement in a manner of using other than the one described here, therefore, protection scope of the present invention is not by following public tool
The limitation of body embodiment.
Control method, the air-conditioning of the air-conditioning system of embodiment according to the present invention offer are described referring to Fig. 1 to Fig. 8
System and a kind of computer readable storage medium.
Fig. 1 shows the flow diagram of the control method of air-conditioning system according to an embodiment of the invention.
As shown in Figure 1, the control method of air-conditioning system according to an embodiment of the invention, comprising:
S102, after receiving the expansion valve out code of indoor unit, control expansion valve is run to closed state；
S104 judges whether the heat exchanger of indoor unit is in operating status；
S106 determines the closed state failure of expansion valve, expansion valve is in off position when heat exchanger is in operating status
When with the aperture being not zero.
In the control method of air-conditioning system provided by the invention, first in the expansion valve out code for receiving indoor unit
Afterwards, i.e., it controls the expansion valve at this time to run to closed state, expansion valve can be closed according to out code, and then detection is indoor
The current state of heat exchanger in machine, and judge whether the heat exchanger in operating status, that is, judge at this time in heat exchanger
Whether the refrigerant in portion is carrying out heat exchange, runs due to having controlled the expansion valve before this to closed state, if the pass of expansion valve
When closed state is effective (expansion valve can effectively be shut), entire circuit is cut off, and heat exchanger then can not heat exchange；Therefore logical
It crosses and judges whether heat exchanger is in operating status, can judge whether expansion valve effectively shuts；Determining result for heat exchange
When device is in operating status, then it can from which further follow that the conclusion of the closed state failure of expansion valve, i.e., receive pass in expansion valve
When closing instruction and being closed, which does not fully control expansion valve and shuts, and expansion valve is only theoretically in closing
State and actually then fail effectively to shut, this result in expansion valve in off position when still there is the aperture being not zero.This hair
The bright current state by the heat exchanging device after expansion valve is run to closed state is judged, can fast and effeciently be detected
Whether expansion valve is shut, and then it is bad to avoid the occurrence of that expansion valve fails to return liquid caused by effectively shutting, noise, frosting are dripped etc.
Phenomenon ensure that the reliability of air-conditioning system.
It is contemplated that ground, air-conditioning system can drag more multi-line systems for one, or the common air-conditioning of one-to-one
Device, can the closed state to the expansion valve in air-conditioning system whether fail and detect.
Fig. 2 shows the flow diagrams of the control method of air-conditioning system according to an embodiment of the invention.
As shown in Fig. 2, the control method of air-conditioning system according to an embodiment of the invention, comprising:
S202, after receiving the expansion valve out code of indoor unit, control expansion valve is run to closed state；
S204 obtains the recuperator inlet temperature T2A and heat exchanger outlet temperature T2B of indoor unit, obtains locating for indoor unit
Room temperature T1 and/or air-conditioning system evaporator refrigerant temperature Te, according to the relationship of T2A, T2B, T1 three and/or according to
The relationship of T2A, T2B, Te three judge whether heat exchanger is in operating status；
S206 determines the closed state failure of expansion valve, expansion valve is in off position when heat exchanger is in operating status
When with the aperture being not zero.
In this embodiment, a kind of concrete scheme for judging whether heat exchanger is in operating status is provided, is obtained first
The recuperator inlet temperature T2A and heat exchanger outlet temperature T2B of indoor unit, then obtain room temperature locating for indoor unit again
T1 judges whether heat exchanger in operating status according to the relationship of T2A, T2B, T1 three, according to recuperator inlet temperature T2A and
Temperature difference between heat exchanger outlet temperature T2B and room temperature T1, to judge whether heat exchanger is in operating status.
In this embodiment, it provides another and judges heat exchanger concrete scheme whether in operating status, obtain first
The recuperator inlet temperature T2A and heat exchanger outlet temperature T2B for taking indoor unit, then obtain the refrigerant evaporation temperature of air-conditioning system again
Te is spent, judges whether heat exchanger is in operating status according to the relationship of T2A, T2B, Te three, according to recuperator inlet temperature T2A
And the temperature difference between heat exchanger outlet temperature T2B and evaporator refrigerant temperature Te, to judge whether heat exchanger is in operating status.
Fig. 3 shows the flow diagram of the control method of air-conditioning system according to an embodiment of the invention.
As shown in figure 3, the control method of air-conditioning system according to an embodiment of the invention, comprising:
S302, after receiving the expansion valve out code of indoor unit, control expansion valve is run to closed state；
S304 judges whether the heat exchanger of indoor unit is in operating status；
S306 determines the closed state failure of expansion valve, expansion valve is in off position when heat exchanger is in operating status
When with the aperture being not zero；
S308, reading the step number that expansion valve is in close state is the first step number P, and the step number for controlling expansion valve promotes second
Step number Δ P, so that the step number of expansion valve changes to P+ Δ P by the first step number P；
The step number that expansion valve is in close state is changed to P+ Δ P by the first step number P by S310.
In this embodiment, a kind of solution after the closed state for getting expansion valve failure is provided.First
The step number that expansion valve is in close state is read, and it is according to preparatory out code pair that the step number, which is defined as the first step number P, P,
When expansion valve is closed, expansion valve is in the step number under the closed state, due to being existed by expansion valve known to above-mentioned analysis
When the first step number P, do not shut actually, but there is also there is an aperture, therefore the first current step number is also no longer appropriate for making
The step number being in off state, but need further to increase the step number of expansion valve, expansion valve is effectively shut；
Then control expansion valve step number by the first step number P promoted the second step number Δ P, and the step number that expansion valve is in close state by
First step number P changes to P+ Δ P, i.e., then again when receiving out code, the step number that will control expansion valve is P+ Δ
P is adjusted by the step number to closed state, it is ensured that expansion valve can be shut when not shutting, be avoided the occurrence of
Because of a series of problems caused by cannot shutting expansion valve.
It is contemplated that ground, the second step number Δ P is default value or for user is regulated and controled on the basis of preset numerical value.
Fig. 4 shows the flow diagram of the control method of air-conditioning system according to an embodiment of the invention.
As shown in figure 4, the control method of air-conditioning system according to an embodiment of the invention, comprising:
S402, after receiving the expansion valve out code of indoor unit, control expansion valve is run to closed state；
S404 judges whether the heat exchanger of indoor unit is in operating status；
S406 determines the closed state failure of expansion valve, expansion valve is in off position when heat exchanger is in operating status
When with the aperture being not zero；
S408, reading the step number that expansion valve is in close state is the first step number P, and the step number for controlling expansion valve promotes second
Step number Δ P, so that the step number of expansion valve changes to P+ Δ P by the first step number P；
The step number that expansion valve is in close state is changed to P+ Δ P by the first step number P by S410；
S412 returns to the step of executing S404 after being spaced preset duration.
In this embodiment, after the step number of expansion valve is changed to P+ Δ P by the first step number P, can also be to adjusting after
Result verified, that is, return to whether rejudge heat exchanger in operating status, and according to abovementioned steps successively again into
Row detection, to guarantee that final heat exchanger will not rerun after expansion valve closing.
Further, rejudge heat exchanger it is whether in operating status when, will not be detected immediately, but need
Judged again after the preset duration of interval, duration is spaced by setting, the buffer time of air-conditioning system stable operation can be given, kept away
Exempt to be detected immediately after adjusting step number and leads to the unstable situation of testing result obtained, i.e., it can be with after the preset duration of interval
Guarantee that testing result is more accurate.
Fig. 5 shows the flow diagram of the control method of air-conditioning system according to an embodiment of the invention.
As shown in figure 5, the control method of air-conditioning system according to an embodiment of the invention, comprising:
S502, after receiving the expansion valve out code of indoor unit, control expansion valve is run to closed state；
S504 judges whether the heat exchanger of indoor unit is in operating status；
S506 determines the closed state failure of expansion valve, expansion valve is in off position when heat exchanger is in operating status
When with the aperture being not zero；
S508, reading the step number that expansion valve is in close state is the first step number P, obtains the maximum step number of expansion valve
Pmax judges whether Pmax < P+ Δ P is true；
S510, when Pmax < P+ Δ P is set up, the step number of variable expansion valve is maximum step number Pmax；Expansion valve is in
The step number of closed state changes to maximum step number Pmax by the first step number P；
S512, when Pmax < P+ Δ P is invalid, the step number for controlling expansion valve promotes the second step number Δ P, so that expansion valve
Step number P+ Δ P is changed to by the first step number P, the step number that expansion valve is in close state is changed into P+ Δ by the first step number P
P。
In this embodiment, when needing the step number to expansion valve closing state to be adjusted, it is also necessary to certainly to expansion valve
The ability to bear and service life of body account for, it is therefore desirable to obtain the maximum step number Pmax of expansion valve, the maximum step number
Pmax is the adaptable maximum step number of expansion valve institute under normal circumstances, expansion valve is being adjusted to more than after the step number, may
Ability to bear beyond expansion valve itself influences its service life in turn.Therefore need to judge whether Pmax < P+ Δ P is true, when
When Pmax < P+ Δ P is invalid, illustrates expansion valve will not be made to be more than Pmax by adjusting, can be adjusted at this time.When
When Pmax < P+ Δ P is set up, if illustrating to promote step number Δ P, the step number P+ Δ P of the expansion valve after adjusting can be more than Pmax, and
Normal use is influenced, step number is no longer changed into P+ Δ P by P at this time, but the step number of variable expansion valve is to maximum step number
Pmax, and then the step number that expansion valve is in close state is changed into maximum step number Pmax by the first step number P, it ensure that expansion valve
Safe handling.
Fig. 6 shows the flow diagram of the control method of air-conditioning system according to an embodiment of the invention.
As shown in fig. 6, the control method of air-conditioning system according to an embodiment of the invention, comprising:
S602, after receiving the expansion valve out code of indoor unit, control expansion valve is run to closed state；
S604 judges whether the heat exchanger of indoor unit is in operating status；
S606 determines the closed state failure of expansion valve, expansion valve is in off position when heat exchanger is in operating status
When with the aperture being not zero；
S608, reading the step number that expansion valve is in close state is the first step number P, and the step number for controlling expansion valve reduces third
Step number P0, the step number for controlling expansion valve change to P+ Δ P by P-P0；
The step number that expansion valve is in close state is changed to P+ Δ P by the first step number P by S610.
In this embodiment, a kind of concrete scheme of the step number of variable expansion valve is provided, obtains expansion valve not in judgement
It when shutting, can also first be saved to readjustment in the case where current first step number P, i.e., the step number for controlling expansion valve first reduces third
Step number P0, this is because when the case where expansion valve appearance cannot be shut, it is possible to it is expansion valve opening clamping stagnation, it can not be followed by
It is continuous to shut, it is therefore desirable to first to be saved to readjustment, to attempt the case where solving clamping stagnation；Then again by the step number of expansion valve by P-P0 tune
For section to P+ Δ P, the practical step number promoted at this time is P0+ Δ P, so that the step number of final expansion valve is P+ Δ P, is adjusted back by setting
Step number P0, solve the problems, such as expansion valve opening clamping stagnation, ensure that can to expansion valve carry out normal regulating.
In one embodiment provided by the invention, it is preferable that according to the pass of T2A, T2B, T1 and/or T2A, T2B, Te
System, judges heat exchanger step whether in operating status, comprising: judge whether T1-T2A > a and/or T1-T2B > b is true,
Wherein a, b are the preset value greater than zero；When T1-T2A > a and/or T1-T2B > b is set up, determine that heat exchanger is in operation shape
State.
In this embodiment, the judgement whether in operating status in heat exchanging device is specifically as follows and judges T1-T2A > a
And/or whether T1-T2B > b is true, if heat exchanger is in the state of operation, then T1 can be significantly greater than T2A, while T1
Significantly greater than T2B；Therefore when T1-T2A > a and/or T1-T2B > b is set up, then it can be determined that heat exchanger is in operating status.
In one embodiment provided by the invention, it is preferable that according to the pass of T2A, T2B, T1 and/or T2A, T2B, Te
System, judges heat exchanger step whether in operating status, comprising: judge whether T2A-Te < c and/or T2B-Te < d is true,
Wherein c, d are the preset value greater than zero；When T2A-Te < c and/or T2B-Te < d is set up, determine that heat exchanger is in operation shape
State.
In this embodiment, the judgement whether in operating status in heat exchanging device judges T2A-Te < c and/or T2B-
Whether Te < d is true, if heat exchanger is in the state of operation, then the difference of T2A and Te can be smaller, the difference of T2B and Te
It can be smaller；Therefore when T2A-Te < c and/or T2B-Te < d is set up, then it can be determined that heat exchanger is in operating status.
Fig. 7 shows the flow diagram of the control method of air-conditioning system according to an embodiment of the invention.
As shown in fig. 7, the control method of air-conditioning system according to an embodiment of the invention, comprising:
S702 judges whether the operational mode of air-conditioning system is refrigeration mode or dehumidification mode；
S704, after receiving the expansion valve out code of indoor unit, control expansion valve is run to closed state；
S706 judges whether the heat exchanger of indoor unit is in operating status；
S708 determines the closed state failure of expansion valve, expansion valve is in off position when heat exchanger is in operating status
When with the aperture being not zero.
In this embodiment, state whether mode can effectively shut expansion valve when detecting in use, it is also necessary to first
Whether the operational mode for judging air-conditioning system is refrigeration mode or dehumidification mode, in refrigeration mode and dehumidification mode, is in room
The heat exchanger of inside is evaporator, and indoor is low-temp low-pressure environment at this time, therefore closing expansion valve will not cause shadow to circuit
It rings；If the operational mode of air-conditioning system is heating mode, indoor is high temperature and pressure, and closing expansion valve at this time will cause pressure
It is excessively high and generate security risk, therefore, in order to ensure that the normal operation of air-conditioning system, need in refrigeration mode or dehumidification mode into
Row subsequent operation.
In one embodiment provided by the invention, it is preferable that when heat exchanger is in operating status, determine expansion valve
Closed state failure, expansion valve in off position when there is the step of aperture being not zero after, comprising: generate and send swollen
The Trouble Report of swollen valve.
In this embodiment, when heat exchanger is in operating status, determine the closed state failure of expansion valve, expansion valve exists
After there is the step of aperture being not zero when closed state, the Trouble Report of expansion valve can be also generated and sent, so that user
Or maintenance personal knows the failure, so as to what can be repaired after it can not be shut by above-mentioned adjusting realization or more renew manually in time
Expansion valve.
According to the second aspect of the invention such as Fig. 8, a kind of air-conditioning system 1 is provided, comprising: memory 12 is configured to deposit
Store up executable instruction；Processor 14 is configured to execute the instruction of storage to realize such as the air-conditioning system of above-mentioned any embodiment
The step of control method, thus have whole technical effects of the control method of the air-conditioning system, details are not described herein.
According to the third aspect of the invention we, a kind of computer readable storage medium is provided, computer journey is stored thereon with
Sequence, when computer program is executed by processor the step of the realization such as control method of the air-conditioning system of above-mentioned any embodiment, because
And have whole technical effects of the control method of the air-conditioning system, details are not described herein.
In the description of this specification, the orientation or positional relationship of the instructions such as term " on ", "lower" is based on shown in attached drawing
Orientation or positional relationship, be merely for convenience of description of the present invention and simplification of the description, rather than the device of indication or suggestion meaning
Or element must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention；
Term " connection ", " installation ", " fixation " etc. shall be understood in a broad sense, for example, " connection " may be a fixed connection, being also possible to can
Dismantling connection, or be integrally connected；It can be directly connected, it can also be indirectly connected through an intermediary.For this field
For those of ordinary skill, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (12)
1. a kind of control method of air-conditioning system, which is characterized in that the control method of the air-conditioning system includes:
After receiving the expansion valve out code of indoor unit, controls the expansion valve and run to closed state；
Judge whether the heat exchanger of the indoor unit is in operating status；
When the heat exchanger is in operating status, the closed state failure of the expansion valve is determined, the expansion valve is described
With the aperture being not zero when closed state.
2. the control method of air-conditioning system according to claim 1, which is characterized in that described whether to judge the heat exchanger
Step in operating status, comprising:
The recuperator inlet temperature T2A and the heat exchanger outlet temperature T2B for obtaining the indoor unit, obtain the indoor unit institute
The room temperature T1 at the place and/or evaporator refrigerant temperature Te of the air-conditioning system, according to the relationship of T2A, T2B, T1 three and/or
According to the relationship of T2A, T2B, Te three, judge whether the heat exchanger is in operating status.
3. the control method of air-conditioning system according to claim 1, which is characterized in that the control method of the air-conditioning system
Further include:
Reading the step number that the expansion valve is in close state is the first step number P；
The step number for controlling the expansion valve promotes the second step number Δ P, so that the step number of the expansion valve is become by the first step number P
More to P+ Δ P；
The step number that the expansion valve is in close state is changed into P+ Δ P by the first step number P.
4. the control method of air-conditioning system according to claim 3, which is characterized in that the control method of the air-conditioning system
Further include:
It is returned after being spaced preset duration and executes the heat exchanger for judging indoor unit step whether in operating status.
5. the control method of air-conditioning system according to claim 3, which is characterized in that the reading expansion valve is in
After the step of first step number P of closed state, comprising:
The maximum step number Pmax for obtaining the expansion valve judges whether Pmax < P+ Δ P is true；
When Pmax < P+ Δ P is set up, the step number of the expansion valve is adjusted as maximum step number Pmax；
The step number that the expansion valve is in close state is changed into the maximum step number Pmax by the first step number P.
6. the control method of air-conditioning system according to claim 3, which is characterized in that the reading expansion valve is in
After the step of first step number P of closed state, comprising:
The step number for controlling the expansion valve reduces third step number P0；
The step number for controlling the expansion valve changes to P+ Δ P by P-P0.
7. the control method of air-conditioning system according to claim 2, which is characterized in that it is described according to T2A, T2B, T1 and/
Or the relationship of T2A, T2B, Te, judge heat exchanger step whether in operating status, comprising:
Judge whether T1-T2A > a and/or T1-T2B > b is true, wherein a, b are the preset value greater than zero；
When T1-T2A > a and/or T1-T2B > b is set up, determine that the heat exchanger is in operating status.
8. the control method of air-conditioning system according to claim 2, which is characterized in that it is described according to T2A, T2B, T1 and/
Or the relationship of T2A, T2B, Te, judge heat exchanger step whether in operating status, comprising:
Judge whether T2A-Te < c and/or T2B-Te < d is true, wherein c, d are the preset value greater than zero；
When T2A-Te < c and/or T2B-Te < d is set up, determine that the heat exchanger is in operating status.
9. the control method of air-conditioning system according to any one of claim 1 to 8, which is characterized in that ought be connect described
After the expansion valve out code for receiving indoor unit, before controlling the step of expansion valve is run to closed state, comprising:
Whether the operational mode for judging the air-conditioning system is refrigeration mode or dehumidification mode.
10. the control method of air-conditioning system according to any one of claim 1 to 8, which is characterized in that work as institute described
State heat exchanger it is in operating status when, determine the expansion valve closed state failure, the expansion valve is in the closed state
When there is the step of aperture being not zero after, comprising:
Generate and send the Trouble Report of the expansion valve.
11. a kind of air-conditioning system, which is characterized in that the air-conditioning system includes:
Memory is configured to storage executable instruction；
Processor is configured to execute the instruction of storage to realize such as the step of any one of claims 1 to 10 the method.
12. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program
It realizes when being executed by processor such as the step of any one of claims 1 to 10 the method.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811314655.0A CN109405177A (en) | 2018-11-06 | 2018-11-06 | Control method, air-conditioning system and the readable storage medium storing program for executing of air-conditioning system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811314655.0A CN109405177A (en) | 2018-11-06 | 2018-11-06 | Control method, air-conditioning system and the readable storage medium storing program for executing of air-conditioning system |
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| CN109405177A true CN109405177A (en) | 2019-03-01 |
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ID=65472008
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| CN201811314655.0A Pending CN109405177A (en) | 2018-11-06 | 2018-11-06 | Control method, air-conditioning system and the readable storage medium storing program for executing of air-conditioning system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110542196A (en) * | 2019-09-16 | 2019-12-06 | 广东美的暖通设备有限公司 | Detection assembly for air conditioner, control method, control device and air conditioner |
| CN110542234A (en) * | 2019-09-12 | 2019-12-06 | 广东美的制冷设备有限公司 | Air conditioner, operation control method and device thereof and computer readable storage medium |
| CN111425986A (en) * | 2020-04-07 | 2020-07-17 | 广东美的暖通设备有限公司 | Indoor unit of air conditioner, control method, air conditioner and readable storage medium |
| CN112524781A (en) * | 2020-12-07 | 2021-03-19 | 佛山市顺德区美的电子科技有限公司 | Control method, device, equipment and storage medium |
| CN112524773A (en) * | 2020-12-09 | 2021-03-19 | 珠海格力电器股份有限公司 | Method and device for determining opening of electronic expansion valve |
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2018
- 2018-11-06 CN CN201811314655.0A patent/CN109405177A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542234A (en) * | 2019-09-12 | 2019-12-06 | 广东美的制冷设备有限公司 | Air conditioner, operation control method and device thereof and computer readable storage medium |
| CN110542234B (en) * | 2019-09-12 | 2021-07-27 | 广东美的制冷设备有限公司 | Air conditioner, operation control method and device thereof and computer readable storage medium |
| CN110542196A (en) * | 2019-09-16 | 2019-12-06 | 广东美的暖通设备有限公司 | Detection assembly for air conditioner, control method, control device and air conditioner |
| CN110542196B (en) * | 2019-09-16 | 2021-05-18 | 广东美的暖通设备有限公司 | Detection assembly for air conditioner, control method, control device and air conditioner |
| CN111425986A (en) * | 2020-04-07 | 2020-07-17 | 广东美的暖通设备有限公司 | Indoor unit of air conditioner, control method, air conditioner and readable storage medium |
| CN111425986B (en) * | 2020-04-07 | 2022-02-01 | 广东美的暖通设备有限公司 | Indoor unit of air conditioner, control method, air conditioner and readable storage medium |
| CN112524781A (en) * | 2020-12-07 | 2021-03-19 | 佛山市顺德区美的电子科技有限公司 | Control method, device, equipment and storage medium |
| CN112524781B (en) * | 2020-12-07 | 2022-06-24 | 佛山市顺德区美的电子科技有限公司 | Control method, device, equipment and storage medium |
| CN112524773A (en) * | 2020-12-09 | 2021-03-19 | 珠海格力电器股份有限公司 | Method and device for determining opening of electronic expansion valve |
| CN112524773B (en) * | 2020-12-09 | 2022-03-18 | 珠海格力电器股份有限公司 | Method and device for determining opening of electronic expansion valve |
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