CN105890247A - Air conditioner, and control method and device for compressor of air conditioner - Google Patents
Air conditioner, and control method and device for compressor of air conditioner Download PDFInfo
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- CN105890247A CN105890247A CN201610216684.8A CN201610216684A CN105890247A CN 105890247 A CN105890247 A CN 105890247A CN 201610216684 A CN201610216684 A CN 201610216684A CN 105890247 A CN105890247 A CN 105890247A
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- preset time
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- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner, and a control method and device for a compressor of the air conditioner. A pressure switch for controlling starting and stopping of the compressor is arranged inside the air conditioner. The control method comprises the steps that the working current of the compressor is detected when the compressor starts; after the compressor starts for a first preset time period, if the working current of the compressor is larger than a first preset current threshold value for the second preset time period, it is judged that the compressor starts normally; after the compressor starts normally, if the working current of the compressor is smaller than a second preset current threshold value for the second preset time period, it is judged that the pressure switch has an abnormal failure, and the compressor is controlled to stop. According to the method, the working condition of the pressure switch is judged by detecting the working current of the compressor, so that starting and stopping of the compressor are controlled according to the working condition of the pressure switch, and safety and reliability of the system are ensured.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly in the control method of compressor, a kind of air-conditioner in a kind of air-conditioner
The control device of compressor and a kind of air-conditioner with this control device.
Background technology
When some high temperature area (such as: the middle east such as Saudi Arabia, the United Arab Emirates) use air-conditioner, the pressure one of refrigeration system
As can higher, especially with some high-pressure refrigerants (such as R410A), the pressure of refrigeration system can be up to 4.8-5Mpa.
Operating air conditioner under such pressure, the life-span of compressor can significantly shorten.Therefore, in correlation technique, increase in air-conditioner
Adding (high pressure) pressure switch, this pressure switch has higher limit and lower limit.When system pressure reaches pressure switch
During higher limit, pressure switch will action, to cut off the power supply of compressor, make compressor quit work；Work as system pressure drop
During to the lower limit of pressure switch, pressure switch can re-close, and connects the power supply of compressor.By the disconnection of pressure switch
And Guan Bi so that compressor will not run when high pressure, thus plays a protective role compressor.
But, use this pressure switch to have individual drawback, it is simply that when system pressure reaches higher limit, pressure switch cuts off pressure
The power supply of contracting machine, after compressor quits work, the pressure of system can be dropped rapidly to pressure switch lower limit (time be about
The 15-20 second), then pressure switch closes again, connects the power supply of compressor, and compressor is again started up.Owing to compressor stops
Only comparatively short to the time started, system pressure also not up to balance, start compressor in this state, can be to compressor
Causing the biggest impact, compressor can be caused the biggest infringement by long-term so startup.
Accordingly, it would be desirable to a kind of novel control method controls the start and stop of compressor.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the one of the present invention
Purpose is to propose the control method of compressor in a kind of air-conditioner, and the method is judged by the operating current of detection compressor
The working condition of pressure switch, thus the start and stop of compressor are controlled according to the working condition of pressure switch, it is ensured that the safety of system
Property and reliability.
Second object of the present invention is to propose the control device of compressor in a kind of air-conditioner.
Third object of the present invention is to propose a kind of air-conditioner.
For reaching above-mentioned purpose, first aspect present invention embodiment proposes the control method of compressor in a kind of air-conditioner, institute
Stating and be additionally provided with the pressure switch controlling described start/stop of compressor in air-conditioner, described control method comprises the following steps: described
The operating current of described compressor is detected during compressor start；When after described compressor start the first Preset Time, if described
Continuous second Preset Time of operating current of compressor is more than the first predetermined current threshold, then judge that described compressor normally starts；
And after described compressor normally starts, if the most described second Preset Time of the operating current of described compressor is less than the
Two predetermined current threshold, then judge described pressure switch generation abnormal failure, and control the closedown of described compressor, wherein, institute
State the second predetermined current threshold less than described first predetermined current threshold.
The control method of compressor in air-conditioner according to embodiments of the present invention, after compressor start the first Preset Time, as
Really continuous second Preset Time of the operating current of compressor is more than the first predetermined current threshold, then judge that compressor normally starts,
After compressor normally starts, if continuous second Preset Time of the operating current of compressor is less than the second predetermined current threshold,
Then judge pressure switch generation abnormal failure, and control compressor closedown.Thus, the method is by detecting the work of compressor
Electric current judges the working condition of pressure switch, thus controls the start and stop of compressor according to the working condition of pressure switch, it is ensured that
The safety and reliability of system.
According to one embodiment of present invention, when judging described pressure switch generation abnormal failure, also show pressure protection event
Barrier information.
An enforcement according to the present invention, after judging described pressure switch generation abnormal failure, if described air-conditioner work as
Front operational mode is refrigeration mode, then control described compressor again after time delay the 3rd Preset Time and restart；If described sky
The present mode of operation adjusting device is heating mode, then control described compressor again after time delay the 4th Preset Time and restart, its
In, described 4th Preset Time is more than described 3rd Preset Time.
According to one embodiment of present invention, when judging described pressure switch generation abnormal failure, enumerator adds 1, wherein,
If the count value of described timer reaches preset value in the 5th Preset Time, then control the shutdown of described air-conditioner, and show pressure
Try hard to keep and protect fault message.
According to one embodiment of present invention, when after the first Preset Time described in described compressor start, if described compressor
The most described second Preset Time of operating current less than or equal to described first predetermined current threshold, then judge that described compressor is sent out
The raw abnormal failure that starts, and it is constant to control described compressor holding current state.
For reaching above-mentioned purpose, a second aspect of the present invention embodiment proposes the control device of compressor in a kind of air-conditioner,
Including: controlling the pressure switch of described start/stop of compressor, described pressure switch is connected on the control line of described compressor；Electricity
Stream detection module, described current detection module for detecting the operating current of described compressor when described compressor start；Control
Molding block, described control module is for after described compressor start the first Preset Time, if the work of described compressor is electric
Flowing continuous second Preset Time and be more than the first predetermined current threshold, described control module then judges that described compressor normally starts,
And after described compressor normally starts, if the most described second Preset Time of the operating current of described compressor is less than the
Two predetermined current threshold, described control module then judges described pressure switch generation abnormal failure, and controls described compression office
Closing, wherein, described second predetermined current threshold is less than described first predetermined current threshold.
The control device of compressor in air-conditioner according to embodiments of the present invention is after compressor start the first Preset Time, logical
The operating current of overcurrent detection module detection compressor, and by control module after compressor start the first Preset Time,
If continuous second Preset Time of the operating current of compressor is more than the first predetermined current threshold, then judge that compressor normally starts,
After compressor normally starts, if continuous second Preset Time of the operating current of compressor is less than the second predetermined current threshold,
Then judge pressure switch generation abnormal failure, and control compressor closedown.Thus, this device is by detecting the work of compressor
Electric current judges the working condition of pressure switch, thus controls the start and stop of compressor according to the working condition of pressure switch, it is ensured that
The safety and reliability of system.
According to one embodiment of present invention, described control module, when judging described pressure switch generation abnormal failure, is also controlled
Display tube processed display pressure protection fault message.
According to one embodiment of present invention, after judging described pressure switch generation abnormal failure, wherein, if described sky
The present mode of operation adjusting device is refrigeration mode, controls described compressor again after described control module then time delay the 3rd Preset Time
Restart；If the present mode of operation of described air-conditioner is heating mode, described control module is time then time delay the 4th is preset
Controlling described compressor after between again to restart, wherein, described 4th Preset Time is more than described 3rd Preset Time.
According to one embodiment of present invention, when judging described pressure switch generation abnormal failure, enumerator adds 1, wherein,
If the count value of described timer reaches preset value in the 5th Preset Time, described control module then controls described air-conditioner and closes
Machine, and control display tube display pressure protection fault message.
According to one embodiment of present invention, when after the first Preset Time described in described compressor start, if described compressor
The most described second Preset Time of operating current less than or equal to described first predetermined current threshold, described control module then judges
There is to start abnormal failure in described compressor, and it is constant to control described compressor holding current state.
Additionally, embodiments of the invention also proposed a kind of transducer air conditioning, it includes described in embodiment of the present invention second aspect
Air-conditioner in the control device of compressor.
The transducer air conditioning of the embodiment of the present invention, by the control device of compressor in above-mentioned air-conditioner, it is possible to according to compression
The operating current of machine judges the working condition of pressure switch, thus controls opening of compressor according to the working condition of pressure switch
Stop, it is ensured that the safety and reliability of system.
Accompanying drawing explanation
Aspect that the present invention is above-mentioned and/or additional and advantage will be apparent from from the following description of the accompanying drawings of embodiments and
Easy to understand, wherein,
Fig. 1 is the flow chart of the control method of compressor in air-conditioner according to an embodiment of the invention；
Fig. 2 is the control circuit figure of compressor according to an embodiment of the invention；
Fig. 3 is to judge the principle schematic whether pressure switch occurs abnormal failure according to an embodiment of the invention；
Process schematic diagram when Fig. 4 is that pressure switch occurs repeatedly abnormal failure according to an embodiment of the invention；And
Fig. 5 is the flow chart of the control method of compressor in air-conditioner in accordance with another embodiment of the present invention.
Reference: pressure switch K, A.C. contactor SK, current detection module 10, control line L1 and N of compressor,
Supply lines L2 and N of compressor, compressor M1 and outdoor fan M2.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most identical
Or similar label represents same or similar element or has the element of same or like function.Retouch below with reference to accompanying drawing
The embodiment stated is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
The control method of compressor, air-conditioner in the air-conditioner proposed according to embodiments of the present invention are described with reference to the accompanying drawings
The control device of middle compressor and air-conditioner.
Fig. 1 is the flow chart of the control method of compressor in air-conditioner according to an embodiment of the invention.Wherein, air-conditioner
In be additionally provided with the pressure switch controlling start/stop of compressor, concrete as in figure 2 it is shown, pressure switch can be connected on the control of compressor
On line processed, and pressure switch is normally closed switch.
As it is shown in figure 1, the control method of compressor comprises the following steps in this air-conditioner:
S1, detects the operating current of compressor when compressor start.
Specifically, as in figure 2 it is shown, compressor can be detected by the current transformer being connected on the supply lines of compressor
Operating current.
S2, when after compressor start the first Preset Time, if continuous second Preset Time of the operating current of compressor is more than the
One predetermined current threshold, then judge that compressor normally starts.Wherein, the first Preset Time and the second Preset Time can bases
Practical situation is demarcated, and the such as first Preset Time can be 5 seconds, and the second Preset Time can be 4 seconds.
S3, after compressor start, if continuous second Preset Time of the operating current of compressor is less than the second predetermined current threshold
Value, then judge pressure switch generation abnormal failure, and control compressor closedown.Wherein, the second predetermined current threshold is less than the
One predetermined current threshold, the first predetermined current threshold, the second predetermined current threshold and the second Preset Time can be according to actual feelings
Condition is demarcated.
Specifically, as it is shown on figure 3, when compressor start, can start to detect the work of compressor by current transformer
Electric current, judges the working condition of pressure switch with the operating current according to compressor.At compressor start the first Preset Time such as
After 5 seconds, if continuous second Preset Time of the operating current of compressor is more than the first predetermined current threshold i in such as 4 secondsH1, then sentence
Disconnected pressure switch is in normal operating conditions, and compressor normally starts.After compressor normally starts, if compressor
Continuous second Preset Time of operating current such as 4 seconds less than the second predetermined current threshold iH2, then judge that pressure switch occurs abnormal
Fault, potentially includes pressure switch disconnection, the inefficacy of compressor stop jumping, current transformer and first, second predetermined current threshold
Arrange unreasonable (operating current of actual compressor and first, second predetermined current threshold are relatively) etc., now need control
Compressor processed is closed.Thus judged the working condition of pressure switch by the operating current of detection compressor, with according to pressure
The working condition of switch controls the start and stop of compressor, it is ensured that the safety and reliability of system.
In embodiments of the present invention, when judging pressure switch generation abnormal failure, also show that pressure protects fault message.Example
As, can be protected by the charactron of air-conditioner or display screen display representative pressure " P6 " of fault message, and after 60s certainly
The dynamic display cancelling this pressure protection fault message.
According to one embodiment of present invention, after judging pressure switch generation abnormal failure, if the current operation of air-conditioner
Pattern is refrigeration mode, then control compressor again after time delay the 3rd Preset Time and restart；If the current operation of air-conditioner
Pattern is heating mode, then control compressor again after time delay the 4th Preset Time and restart.Wherein, the 4th Preset Time is big
In the 3rd Preset Time, the 3rd Preset Time and the 4th Preset Time can be demarcated according to practical situation, and the such as the 3rd is pre-
If the time can be 3 minutes, the 4th Preset Time can be 4 minutes.
It is to say, after judging pressure switch generation abnormal failure, if the present mode of operation of air-conditioner is refrigeration mode,
Then time delay controls compressor again after 3 minutes and restarts；If the present mode of operation of air-conditioner is heating mode, then time delay
Control compressor after 4 minutes again to restart, thus be prevented effectively from correlation technique owing to compressor is from stopping to the startup time
Shorter, start compressor when system pressure also lack of equilibrium, compressor is caused bigger shock problem.
Specifically, as in figure 2 it is shown, when air-conditioner is when high temperature area is properly functioning, and pressure switch is in closure state,
Now the coil in A.C. contactor obtains electric, the normally opened contact Guan Bi in A.C. contactor, to power to compressor, and compressor
Normal work.In compressor course of normal operation, it is connected on the current transformer on compressor supply lines and detects compression in real time
The operating current of machine.When the pressure of system reaches the higher limit of pressure switch, pressure switch can disconnect, now ac contactor
The coil losing electricity of device, the normally opened contact of A.C. contactor disconnects, and the operating current of the compressor that current transformer detects is by little
In the second predetermined current threshold, such that it is able to judge pressure switch generation abnormal failure, now control the driving letter of compressor
Number stop output, and control outdoor fan and shut down, so that compressor is protected.
After closing due to compressor, the pressure of system can be dropped rapidly to the lower limit of pressure switch, when system pressure drops to
During the lower limit of pressure switch, pressure switch can close again, but the pressure of system also lack of equilibrium, to this end, in the present invention
Embodiment in, after judging pressure switch generation abnormal failure start timing, when timing time reaches the 3rd Preset Time
Or after the 4th Preset Time, then output drive signal is to compressor, to control compressor start, and at compressor start
After one Preset Time, it is judged that the operating current of compressor, if the operating current of continuous second Preset Time compressor is more than the
One predetermined current threshold, then judge that compressor normally starts, and now to control compressor properly functioning for output drive signal, and
Control outdoor fan operating.Thus effectively prevent owing to compressor is shorter, at system pressure the most not to the startup time from stopping
Start compressor during balance, compressor is caused bigger shock problem, improve the service life of compressor, and then improve
Air-conditioner is in high pressure region reliability of operation.
It addition, in one embodiment of the invention, when judging pressure switch generation abnormal failure, enumerator adds 1, if
The count value of the 5th Preset Time inside counting device reaches preset value, then control air-conditioner shutdown, and show pressure protection fault letter
Breath.Wherein, the 5th Preset Time and preset value can be demarcated according to practical situation, and such as, the 5th Preset Time is permissible
Being 1 hour, preset value can be 9.
Specifically, as shown in Figure 4, when judging pressure switch generation abnormal failure, enumerator adds 1, and timer is opened
Beginning timing.If in 1 hour, the count value of enumerator is not up to preset value such as 9, then counter O reset.When again sentencing
During disconnected pressure switch generation abnormal failure, enumerator adds 1, and timer starts timing.If in 1 hour, counting
The count value of device reaches preset value 9, then control air-conditioner shutdown, to protect air-conditioner, and show pressure always
Protection fault message " P6 ".When user is shut down by remote controller, this pressure protection fault message and pressure switch occur different
Often number of times and the time of fault can be eliminated.
In one embodiment of the invention, as it is shown in figure 5, the control method of compressor also includes in air-conditioner: S4, when
After compressor start the first Preset Time, if continuous second Preset Time of the operating current of compressor is preset less than or equal to first
Current threshold, then judge that compressor occurs to start abnormal failure, and it be constant to control compressor holding current state.
Specifically, when after compressor start 5 seconds, if the operating current of compressor is preset for continuous 4 seconds less than or equal to first
Current threshold, then judge compressor occur start abnormal failure, potentially include compressor self stop jumping, pressure switch lost efficacy,
The control module of compressor lost efficacy, current transformer on the supply lines of compressor lost efficacy and first, second predetermined current threshold
Value arranges unreasonable etc..After judging that compressor occurs to start abnormal failure, control compressor and outdoor fan keeps current shape
State is constant, the most not close compressor and outdoor fan, until compressor and outdoor fan normally start.
Furthermore, it is necessary to explanation, when the pressure switch in air-conditioner is without carrying out abnormal failure detection, can be by first
As newly-increased E side parameter, (E side's parameter is the function selecting parameter of air-conditioner to predetermined current threshold, i.e. when certain function of needs
Time, by parameter, this function of unlatching is set；When need not certain function, this function of closedown is set by parameter), and arrange
First predetermined current threshold is 0, to forbid detecting whether pressure switch occurs abnormal failure.Remove it addition, be at air-conditioner
Time between frost season, the most do not detect whether pressure switch occurs abnormal failure.
The control method of compressor in air-conditioner according to embodiments of the present invention, after compressor start the first Preset Time, as
Really continuous second Preset Time of the operating current of compressor is more than the first predetermined current threshold, then judge that compressor normally starts,
After compressor normally starts, if continuous second Preset Time of the operating current of compressor is less than the second predetermined current threshold,
Then judge pressure switch generation abnormal failure, and control compressor closedown.Thus, the method is by detecting the work of compressor
Electric current judges the working condition of pressure switch, thus controls the start and stop of compressor according to the working condition of pressure switch, it is ensured that
The safety and reliability of system, and the method also effectively prevent due to pressure switch by be disconnected to Guan Bi time too short,
System pressure also lack of equilibrium and open compressor, the problem that compressor is impacted, thus realize protection to compressor,
It is effectively improved reliability when air-conditioner runs in high temperature area.
Fig. 2 is the control circuit figure of compressor according to an embodiment of the invention, as in figure 2 it is shown, compressor in air-conditioner
Control device may include that pressure switch K, current detection module 10 and control module (not specifically illustrated in figure).
Wherein, pressure switch K is used for controlling compressor M1 start and stop, and pressure switch K is connected on the control line of compressor M1
On L1.Current detection module 10 for detecting the operating current of compressor M1 when compressor M1 starts, such as, can lead to
Cross the operating current of series current transformer detection compressor M1 on the supply lines L2 of compressor M1.Control module is used for
After compressor M1 starts the first Preset Time, if continuous second Preset Time of the operating current of compressor M1 is more than the
One predetermined current threshold, control module then judges that compressor M1 normally starts, and after compressor M1 normally starts,
If continuous second Preset Time of the operating current of compressor M1 is less than the second predetermined current threshold, control module then judges pressure
There is abnormal failure in power switch K, and controls compressor M1 closedown, and wherein, the second predetermined current threshold is preset less than first
Current threshold.
Specifically, as it is shown on figure 3, when compressor M1 starts, current detection module 10 such as current transformer can be passed through
Start to detect the operating current of compressor M1, judge the work feelings of pressure switch K with the operating current according to compressor M1
Condition.After compressor M1 starts the first Preset Time such as 5 seconds, if the operating current of compressor M1 continuous second is preset
Time such as 4 seconds is more than the first predetermined current threshold iH1, then control module judges that pressure switch K is in normal operating conditions, and
Compressor M1 normally starts；If it is pre-that continuous second Preset Time of the operating current of compressor M1 is less than second in such as 4 seconds
If current threshold iH2, then judge that pressure switch K occurs abnormal failure, potentially include the disconnection of pressure switch K, compressor M1
Stop jumping, current transformer lost efficacy and first, second predetermined current threshold arranges unreasonable etc., now needed to control compressor M1
Close.Thus judged the working condition of pressure switch by the operating current of detection compressor, with the work according to pressure switch
Make situation and control the start and stop of compressor, it is ensured that the safety and reliability of system.
In embodiments of the present invention, control module, when judging that pressure switch K occurs abnormal failure, also shows pressure protection event
Barrier information.For example, it is possible to pass through charactron or " P6 " of display screen display representative pressure protection fault message of air-conditioner,
And the most automatically cancel the display of this pressure protection fault message.
According to one embodiment of present invention, after judging that pressure switch K occurs abnormal failure, if air-conditioner is current
Operational mode is refrigeration mode, controls compressor M1 again and restart after control module then time delay the 3rd Preset Time；If
The present mode of operation of air-conditioner is heating mode, controls compressor M1 weight after control module then time delay the 4th Preset Time again
New startup.Wherein, the 4th Preset Time is more than the 3rd Preset Time, and the such as the 3rd Preset Time can be 3 minutes, and the 4th
Preset Time can be 4 minutes.
It is to say, when after judging that pressure switch K occurs abnormal failure, if the present mode of operation of air-conditioner is refrigeration
Pattern, control module then time delay controls compressor M1 again after 3 minutes and restarts；If the present mode of operation of air-conditioner
For heating mode, control module then time delay controls compressor M1 again after 4 minutes and restarts, thus is prevented effectively from relevant skill
In art due to compressor from stopping to starting the time shorter, when system pressure also lack of equilibrium start compressor, compressor is made
Become bigger impact.
Specifically, as in figure 2 it is shown, when air-conditioner is when high temperature area is properly functioning, and pressure switch K is in closure state,
Now the coil in A.C. contactor SK obtains electric, and the normally opened contact Guan Bi in A.C. contactor SK, to supply to compressor M1
Electricity, compressor M1 normally works.In compressor M1 course of normal operation, it is connected on compressor M1 supply lines L2
Current transformer detect the operating current of compressor M1 in real time.When the pressure of system reaches the higher limit of pressure switch K,
Pressure switch K can disconnect, now the coil losing electricity of A.C. contactor SK, and the normally opened contact of A.C. contactor SK disconnects,
The operating current of the compressor M1 that current transformer detects will be less than the second predetermined current threshold iH2, such that it is able to judge
There is abnormal failure in pressure switch K, the driving signal now controlling compressor M1 stops output, and controls outdoor fan
M2 shuts down, to protect compressor.After closing due to compressor M1, the pressure of system can be dropped rapidly to pressure
The lower limit of power switch K, when system pressure drops to the lower limit of pressure switch K, pressure switch K can close again,
But the pressure of system also lack of equilibrium, to this end, in an embodiment of the present invention, is judging that pressure switch K occurs abnormal event
Starting timing after barrier, after timing time reaches the 3rd Preset Time or the 4th Preset Time, then output drive signal is to pressure
Contracting machine M1, to control compressor M1 startup, and after compressor M1 starts the first Preset Time, it is judged that compressor M1
Operating current, if the operating current of continuous second Preset Time compressor M1 more than the first predetermined current threshold, is then sentenced
Disconnected compressor M1 normally starts, and now to control compressor M1 properly functioning for output drive signal, and controls outdoor fan
M2 operates.Thus effectively prevent owing to compressor is shorter to the startup time from stopping, starting when system pressure also lack of equilibrium
Compressor, causes bigger shock problem to compressor, improves the service life of compressor, and then improves air-conditioner and exist
High pressure region reliability of operation.
It addition, in one embodiment of the invention, when judging that pressure switch K occurs abnormal failure, enumerator adds 1,
If the count value of the 5th Preset Time inside counting device reaches preset value, then control air-conditioner shutdown, and show pressure protection event
Barrier information.Wherein the 5th Preset Time can be 1 hour, and preset value can be 9.
Specifically, as shown in Figure 4, when judging that pressure switch K occurs abnormal failure, enumerator adds 1, and timing
Device starts timing.If in 1 hour, the count value of enumerator is not up to preset value such as 9, then counter O reset.When again
When secondary judgement pressure switch K occurs abnormal failure, enumerator adds 1, and timer starts timing.If in 1 hour,
The count value of enumerator reaches preset value 9, then control air-conditioner shutdown, to protect air-conditioner, and show pressure
Protection fault message " P6 ".When user is shut down by remote controller, this pressure protection fault message and pressure switch K occur
The number of times of abnormal failure and time can be eliminated.
According to one embodiment of present invention, after compressor M1 starts the first Preset Time, if the work of compressor M1
Continuous second Preset Time of electric current is less than or equal to the first predetermined current threshold, and control module then judges that compressor M1 starts
Abnormal failure, and it is constant to control compressor M1 holding current state.
Specifically, when compressor M1 started after 5 seconds, if continuous 4 seconds of the operating current of compressor M1 is less than or equal to the
One predetermined current threshold iH1, then judge compressor M1 occur start abnormal failure, potentially include self stop jumping of compressor M1,
Pressure switch K lost efficacy, the control module of compressor M1 lost efficacy, current transformer on the supply lines L2 of compressor M1 loses
Effect and first, second predetermined current threshold arrange unreasonable etc..After judging that compressor M1 occurs to start abnormal failure,
Controlling compressor M1 and outdoor fan M2 keeps current state constant, the most not close compressor M1 and outdoor fan M2,
Until compressor M1 and outdoor fan M2 normally starts.
Furthermore, it is necessary to explanation, can be by the when pressure switch K in air-conditioner is without carrying out abnormal failure detection
One predetermined current threshold is as newly-increased E side parameter, and to arrange the first predetermined current threshold be 0, to forbid detecting pressure switch
Whether K there is abnormal failure.It addition, time during air-conditioner is in defrosting, the most do not detect whether pressure switch occurs different
Often fault.
The control device of compressor in air-conditioner according to embodiments of the present invention is after compressor start the first Preset Time, logical
The operating current of overcurrent detection module detection compressor, and by control module after compressor start the first Preset Time,
If continuous second Preset Time of the operating current of compressor is more than the first predetermined current threshold, then judge that compressor normally starts,
After compressor normally starts, if continuous second Preset Time of the operating current of compressor is less than the second predetermined current threshold,
Then judge pressure switch generation abnormal failure, and control compressor closedown.Thus, this device is by detecting the work of compressor
Electric current judges the working condition of pressure switch, thus controls the start and stop of compressor according to the working condition of pressure switch, it is ensured that
The safety and reliability of system, and the method also effectively prevent due to pressure switch by be disconnected to Guan Bi time too short,
System pressure also lack of equilibrium and open compressor, the problem that compressor is impacted, thus realize protection to compressor,
It is effectively improved reliability when air-conditioner runs in high temperature area.
Additionally, embodiments of the invention also proposed a kind of transducer air conditioning, it includes the control of compressor in above-mentioned air-conditioner
Device processed.
The transducer air conditioning of the embodiment of the present invention, by the control device of compressor in above-mentioned air-conditioner, it is possible to according to compression
The operating current of machine judges the working condition of pressure switch, thus controls opening of compressor according to the working condition of pressure switch
Stop, and also effectively prevent due to pressure switch by be disconnected to Guan Bi time too short, system pressure also lack of equilibrium and open
Compressor, the problem that compressor is impacted, thus realize the protection to compressor, it is effectively improved air-conditioner on high temperature ground
Reliability when district runs.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward ",
Orientation or the position relationship of the instruction such as " clockwise ", " counterclockwise ", " axially ", " radially ", " circumferential " are based on shown in the drawings
Orientation or position relationship, be for only for ease of describe the present invention and simplify describe rather than instruction or hint indication device or
Element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance or
The implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or hidden
At least one this feature is included containing ground.In describing the invention, " multiple " are meant that at least two, such as two, three
Individual etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", the art such as " fixing "
Language should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be machinery
Connect, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two units
Connection within part or the interaction relationship of two elements, unless otherwise clear and definite restriction.Ordinary skill for this area
For personnel, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be
First and second features directly contact, or the first and second features are by intermediary mediate contact.And, first is special
Levy second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only
Only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below "
Can be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second
Feature.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " concrete example ",
Or specific features, structure, material or the feature bag that the description of " some examples " etc. means to combine this embodiment or example describes
It is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term necessarily
It is directed to identical embodiment or example.And, the specific features of description, structure, material or feature can be arbitrary
Individual or multiple embodiment or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be combined by art personnel
And combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is exemplary,
Being not considered as limiting the invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodiment
It is changed, revises, replaces and modification.
Claims (11)
1. the control method of compressor in an air-conditioner, it is characterised in that be additionally provided with the described compression of control in described air-conditioner
The pressure switch of machine start and stop, described control method comprises the following steps:
The operating current of described compressor is detected when described compressor start；
When after described compressor start the first Preset Time, if continuous second Preset Time of the operating current of described compressor is big
In the first predetermined current threshold, then judge that described compressor normally starts；And
After described compressor normally starts, if the most described second Preset Time of the operating current of described compressor is less than the
Two predetermined current threshold, then judge described pressure switch generation abnormal failure, and control the closedown of described compressor, wherein, institute
State the second predetermined current threshold less than described first predetermined current threshold.
2. the control method of compressor in air-conditioner as claimed in claim 1, it is characterised in that judging that described pressure is opened
When closing generation abnormal failure, also show that pressure protects fault message.
3. the control method of compressor in air-conditioner as claimed in claim 1 or 2, it is characterised in that when judging described pressure
After there is abnormal failure in power switch,
If the present mode of operation of described air-conditioner is refrigeration mode, then control described compression again after time delay the 3rd Preset Time
Machine restarts；
If the present mode of operation of described air-conditioner is heating mode, then control described compression again after time delay the 4th Preset Time
Machine restarts, and wherein, described 4th Preset Time is more than described 3rd Preset Time.
4. the control method of compressor in air-conditioner as claimed in claim 1, it is characterised in that judging that described pressure is opened
When closing generation abnormal failure, enumerator adds 1, wherein, if the count value of described enumerator reaches pre-in the 5th Preset Time
If value, then control the shutdown of described air-conditioner, and show that pressure protects fault message.
5. the control method of compressor in air-conditioner as claimed in claim 1, it is characterised in that when described compressor start
After described first Preset Time, if the most described second Preset Time of the operating current of described compressor is less than or equal to described the
One predetermined current threshold, then judge that described compressor occurs to start abnormal failure, and control described compressor holding current state
Constant.
6. the control device of compressor in an air-conditioner, it is characterised in that including:
Controlling the pressure switch of described start/stop of compressor, described pressure switch is connected on the control line of described compressor；
Current detection module, described current detection module for detecting the work electricity of described compressor when described compressor start
Stream；
Control module, described control module is used for after described compressor start the first Preset Time, if described compressor
Continuous second Preset Time of operating current is more than the first predetermined current threshold, and described control module then judges that described compressor is normal
Start, and after described compressor normally starts, if the most described second Preset Time of the operating current of described compressor
Less than the second predetermined current threshold, described control module then judges described pressure switch generation abnormal failure, and controls described pressure
Contracting office closes, and wherein, described second predetermined current threshold is less than described first predetermined current threshold.
7. the control device of compressor in air-conditioner as claimed in claim 6, it is characterised in that described control module is being sentenced
During disconnected described pressure switch generation abnormal failure, also control display tube display pressure protection fault message.
The control device of compressor in air-conditioner the most as claimed in claims 6 or 7, it is characterised in that when judging described pressure
After there is abnormal failure in power switch,
If the present mode of operation of described air-conditioner is refrigeration mode, after described control module then time delay the 3rd Preset Time again
Control described compressor to restart；
If the present mode of operation of described air-conditioner is heating mode, after described control module then time delay the 4th Preset Time again
Controlling described compressor to restart, wherein, described 4th Preset Time is more than described 3rd Preset Time.
9. the control device of compressor in air-conditioner as claimed in claim 6, it is characterised in that judging that described pressure is opened
When closing generation abnormal failure, enumerator adds 1, wherein, if the count value of described enumerator reaches pre-in the 5th Preset Time
If value, described control module then controls the shutdown of described air-conditioner, and controls display tube display pressure protection fault message.
10. the control device of compressor in air-conditioner as claimed in claim 6, it is characterised in that when described compressor opens
After dynamic described first Preset Time, if the most described second Preset Time of the operating current of described compressor is less than or equal to described
First predetermined current threshold, described control module then judges that described compressor occurs to start abnormal failure, and controls described compression
Machine keeps current state constant.
11. 1 kinds of air-conditioners, it is characterised in that include compressor in the air-conditioner as according to any one of claim 6-10
Control device.
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| CN201610216684.8A CN105890247B (en) | 2016-04-08 | 2016-04-08 | The control method and device of air conditioner and its compressor |
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| CN201610216684.8A CN105890247B (en) | 2016-04-08 | 2016-04-08 | The control method and device of air conditioner and its compressor |
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| CN107228489A (en) * | 2017-07-24 | 2017-10-03 | 广东美的暖通设备有限公司 | The method for heating and controlling and Teat pump boiler of Teat pump boiler |
| CN108332343A (en) * | 2017-07-21 | 2018-07-27 | 广东美的暖通设备有限公司 | Control method, control device and the air conditioner of air conditioner |
| CN108839290A (en) * | 2018-05-03 | 2018-11-20 | 张燕苹 | A kind of interior cooling device of tubular film production equipment |
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| EP3686428A1 (en) * | 2019-01-25 | 2020-07-29 | LG Electronics Inc. | Linear compressor and method for controlling linear compressor |
| CN112065704A (en) * | 2020-09-29 | 2020-12-11 | 广东芬尼克兹节能设备有限公司 | Compressor switch fault protection method and device |
| CN113757943A (en) * | 2021-09-17 | 2021-12-07 | 广东电网有限责任公司 | Air conditioning system fault diagnosis method and system based on fault judgment rule |
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