CN107248724B - Power phase shortage detection method when a kind of compressor of air conditioner operation - Google Patents
Power phase shortage detection method when a kind of compressor of air conditioner operation Download PDFInfo
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- CN107248724B CN107248724B CN201610580122.1A CN201610580122A CN107248724B CN 107248724 B CN107248724 B CN 107248724B CN 201610580122 A CN201610580122 A CN 201610580122A CN 107248724 B CN107248724 B CN 107248724B
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- compressor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/09—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against over-voltage; against reduction of voltage; against phase interruption
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/16—Measuring asymmetry of polyphase networks
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Power phase shortage detection method when being run the invention discloses a kind of compressor of air conditioner, the method includes：Air-conditioning is switched on, and the outdoor controller control compressor is opened；First current sensing means and the second current sensing means obtain the second phase supply lines and the first current value on third phase supply lines and the second current value in real time, and first current value and the second current value are sent to the outdoor controller；The outdoor controller receives first current value and the second current value, and carries out preset calculating；Result of calculation is compared by outdoor controller with preset current threshold, and according to comparison result, control compressor continues on or stops.The beneficial effects of the invention are as follows：（1）Pile defection can be carried out to the compressor in operating status.（2）It is more quick to the pile defection of compressor.
Description
Technical field
The present invention relates to airconditioning control fields, are specifically related to power phase shortage detection side when a kind of compressor of air conditioner operation
Method.
Background technology
When the compressor of three phase supply is out of service, if there is one phase phase shortage of power supply, when starting motor, three-phase windings generate
Magnetic field can be divided into the rotating excitation field that two equal in magnitude, direction is opposite, their effect is generated with rotor torques are also size
It is equal, direction on the contrary, therefore detent torque be zero and cannot start, at this time generally by detect the frequency of three phase supply coil come
Detect whether that phase shortage, method are ripe.
The phase shortage when compressor operating of three phase supply, the magnetic field that three-phase windings generate can also be divided into two equal in magnitude, sides
To opposite rotating excitation field, but the relative rotation speed for turning to compressor opposite rotating excitation field and rotor is very big, produces in the rotor
The frequency of raw induced electromotive force and electric current is almost several times of supply frequency, and rotor induction reactance is very big, and the active component of current is very
Small, reverse torque is much smaller than forward torque, and compressor continues to run with, and three phase supply coil has induction electric in this case
Gesture can not detect phase shortage situation with the method for detection three phase mains frequency, if not hard stop, long-time phase shortage operates meeting
Compressor coil windings are burnt out, compressor permanent damages are caused.
A kind of judgement of transducer air conditioning compressor phase shortage of disclosure of the invention described in application number 201010252018.2 and
Guard method, it includes step：（1）The quiescent current of frequency converter is measured in advance；Compressor is set according to quiescent current to lack
The current threshold of phase；（2）In frequency converter operating, the current value that stochastical sampling arrives is read, by the current value according to the frequency converter
The driving circuit mode of use calculates the current value of three phases of compressor；（3）By step（2）In the three-phase current that is calculated
Value is made comparisons with the current threshold respectively, if one current value of any of which is less than the current threshold, judges compressor
Phase shortage stops frequency converter and exports and prompt compressor open-phase fault；Otherwise, return to step（2）.It needs to detect in real time in this method
The each current value and whole of three-phase electricity are judged, and need to set different current thresholds according to different quiescent currents
Value, process is complicated, is unfavorable for quick detection when compressor phase shortage.
Invention content
Power phase shortage detection method when being run it is an object of the present invention to provide a kind of compressor of air conditioner so as to fortune
The detection of compressor when row is more efficiently quick.
Specifically, the present invention is achieved through the following technical solutions：
Power phase shortage detection method when a kind of compressor of air conditioner operation, the compressor are the compressor of three phase supply, tool
There is three phase supply electric wire, concatenates outdoor controller on the first phase power supply electric wire, power in the second phase supply lines and third phase
The first current sensing means and the second current sensing means are respectively arranged on line, the method includes the steps：
S1：Air-conditioning is switched on, and the outdoor controller control compressor is opened；
S2：First current sensing means and the second current sensing means obtain the second phase supply lines and third phase power supply in real time
The first current value on line and the second current value, and first current value and the second current value are sent to the outdoor unit control
Device processed；
S3：The outdoor controller receives first current value and the second current value, and carries out preset calculating；
S4：Result of calculation is compared by outdoor controller with preset current threshold, according to comparison result, control pressure
Contracting machine continues on or stops.
Preset calculating described in step S2, specially：
Calculate the absolute value of the difference of first current value and the second current value；
The step S4 is specially：
Outdoor controller judges whether the absolute value of the difference is more than preset current threshold, if it is, control
The compressor stops.
The preset current threshold is：The half of higher value in first current value and the second current value.
Power phase shortage detection method when being run the invention discloses a kind of compressor of air conditioner, the method includes：Air-conditioning is opened
Machine, the outdoor controller control compressor are opened；First current sensing means and the second current sensing means obtain in real time
The first current value on second phase supply lines and third phase supply lines and the second current value, and by first current value and second
Current value is sent to the outdoor controller；The outdoor controller receives first current value and the second current value,
And carry out preset calculating；Result of calculation is compared by outdoor controller with preset current threshold, according to comparison result,
Control compressor continues on or stops.The beneficial effects of the invention are as follows：（1）Compressor in operating status can be lacked
Mutually detect.（2）It is more quick to the pile defection of compressor.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of air-conditioning system structural schematic diagram provided in an embodiment of the present invention；
Fig. 2 is a kind of compressor three-phase electricity attachment structure schematic diagram provided in an embodiment of the present invention；
Fig. 3 is that power phase shortage detection method flow is illustrated when the first compressor of air conditioner provided in an embodiment of the present invention is run
Figure；
Fig. 4 is that power phase shortage detection method flow is illustrated when second of compressor of air conditioner provided in an embodiment of the present invention is run
Figure.
Reference sign
The connection relation between structure and each component further clearly to illustrate the present invention, gives the following drawings mark
Note, and be illustrated.
1, indoor unit；11, indoor heat exchanger；12, indoor machine controller；13, indoor temperature transmitter；14, indoor fan；
2, outdoor unit；21, compressor；22, four-way valve；23, outdoor heat exchanger；24, throttle mechanism；25, outdoor fan；26, gas-liquid point
From device；27, outdoor environment temperature sensor；28, outdoor coil temperature sensor；29, muffler；30, high-voltage detecting device；
31, low pressure detection device；32, outdoor controller；33, the first shut-off valve；34, the second shut-off valve；41, the first phase power supply electricity
Line；42 second phases power supply electric wire,；43 third phases power supply electric wire,；51, the first current sensing means；52, the second current detecting fills
It sets.
Description of symbols through the above attached drawings can be more clearly understood and illustrate this hair in conjunction with the embodiment of the present invention
Bright technical solution.
Specific implementation mode
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.On the contrary, they be only with it is such as appended
The example of the consistent device and method of some aspects being described in detail in claims, of the invention.
It is the purpose only merely for description specific embodiment in terminology used in the present invention, is not intended to limit the invention.
It is also intended to including majority in the present invention and "an" of singulative used in the attached claims, " described " and "the"
Form, unless context clearly shows that other meanings.It is also understood that term "and/or" used herein refers to and wraps
Containing one or more associated list items purposes, any or all may be combined.
It will be appreciated that though various information, but this may be described using term first, second, third, etc. in the present invention
A little information should not necessarily be limited by these terms.These terms are only used for same type of information being distinguished from each other out.For example, not departing from
In the case of the scope of the invention, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as
One information.Depending on context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determination ".
The present invention will be described in detail by way of examples below.
A kind of air conditioner, as shown in Figure 1, including indoor unit 1 and outdoor unit 2, the indoor unit 1 includes indoor heat exchanger
11, indoor fan 14, indoor machine controller 12 and indoor temperature transmitter 13, wherein indoor temperature transmitter 13 measure in real time
Ambient temperature value, and the temperature value signal is sent to indoor machine controller 12；The outdoor unit 2 includes compressor 21, disappears
Sound device 29, high-voltage detecting device 30, four-way valve 22, low pressure detection device 31, gas-liquid separator 26, outdoor heat exchanger 23, outdoor
Wind turbine 25, throttle mechanism 24, outdoor environment temperature sensor 27, outdoor coil temperature sensor 28 and outdoor controller
32, the outdoor controller 2 is at least used to control compressor and opens or stop；The air conditioner also has the first shut-off valve 33
With the second shut-off valve 34, the connection for pipeline between air conditioner room unit and outdoor unit；User can control described according to demand
The opening and closing of the different valve ports of four-way valve 22, selects air-conditioning to be in refrigeration or refrigeration mode；When at air-conditioning with refrigeration mode, compressor
21 carry out its internal refrigerant the gaseous state of boil down to high temperature and pressure, followed by muffler 29, high-voltage detecting device 30, lead to
It crosses the conducting of four-way valve 22 and flow to outdoor heat exchanger 23, the refrigerant becomes medium temperature and medium pressure after the heat exchange of outdoor heat exchanger 23
Liquid, flow through throttle mechanism 24 and indoor heat exchanger 11, the refrigerant vaporization absorption heat of liquid, indoor heat exchanger 11 later
The cools air of surrounding, indoor fan 14 blow out the air to turn cold to form cold wind, and gaseous refrigerant flow to four-way valve 22, root
It is acted on according to the conducting of four-way valve, after low pressure detection device 31, gas-liquid separator 26, into compressor 21.Similar,
When at air-conditioning with heating mode, its internal refrigerant is carried out the gaseous state of boil down to high temperature and pressure by compressor 21, is flowed successively
Through muffler 29, high-voltage detecting device 30, indoor heat exchanger 11, by the atmosphere temperature rising around indoor heat exchanger 11, indoor fan
14 will heat up after air blow out to form hot wind, the refrigerant becomes medium temperature and medium pressure after the heat exchange of indoor heat exchanger 11
Liquid, flows through throttle mechanism 24 and outdoor heat exchanger 23 later, and the refrigerant vaporization absorption heat of liquid becomes gaseous state, absorbs week
A large amount of heat in air is enclosed, the temperature around outdoor heat exchanger 23 is made to reduce, gaseous refrigerant detects followed by low pressure
After device 31, gas-liquid separator 26, into compressor 21.
The compressor of the air-conditioning is the compressor of three phase supply, has three phase supply electric wire, as shown in Fig. 2, L1, L2,
L3 indicates three phase mains respectively, and three phase supply electric wire is in this patent with the first phase of noun power supply electric wire, the second phase power supply electric wire
Electric wire is powered to show difference with third phase, wherein the first phase power supply electric wire 41 gives the outdoor controller 32 to power, and by institute
It states and is picked out in outdoor controller 32, be connected to the compressor 21, the second phase supply lines 42 and third phase supply lines 43
It is respectively connected to the corresponding three-phase electrical interface of compressor, and is divided on the second phase supply lines 42 and third phase supply lines 43
It is not provided with the first current sensing means 51 and the second current sensing means 52, is respectively used to detect the second phase supply lines 42
With the first current value and the second current value on third phase supply lines 43, and first current sensing means and the second electric current
Detection device can be communicated with the outdoor controller 32.
Specifically, as shown in figure 3, power phase shortage detection method step is when the compressor of air conditioner is run：
S101：Air-conditioning is switched on, and the outdoor controller control compressor is opened.
S102：First current sensing means and the second current sensing means obtain the second phase supply lines in real time and third phase supplies
The first current value on electric wire and the second current value, and first current value and the second current value are sent to the outdoor unit
Controller.
S103：The outdoor controller receives first current value and the second current value, and carries out preset calculating.
S104：Result of calculation is compared by outdoor controller with preset current threshold, according to comparison result, control
Compressor continues on or stops.
Further, the preset calculating can be：Calculate the difference of first current value and the second current value
Absolute value.Later, outdoor controller judges whether the absolute value of the difference is more than in the first current value and the second current value
The half of higher value stops if it is, controlling the compressor.
Specifically, as shown in figure 4, the method is specially：
S201：Air-conditioning is switched on, and the outdoor controller control compressor is opened.
S202：First current sensing means and the second current sensing means obtain the second phase supply lines in real time and third phase supplies
The first current value on electric wire and the second current value, and first current value and the second current value are sent to the outdoor unit
Controller.
S203：The outdoor controller receives first current value and the second current value, and calculates first electricity
The absolute value of flow valuve and the difference of the second current value.
S204：Outdoor controller judges whether result of calculation is more than higher value in the first current value and the second current value
Half, if it is, control compressor stops, if it is not, then continuing to keep compressor operating.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent substitution, improvement and etc. done should be included within the scope of protection of the invention god.
Claims (2)
1. power phase shortage detection method when a kind of compressor of air conditioner operation, the compressor are the compressor of three phase supply, have
Three phase supply electric wire, which is characterized in that outdoor controller is concatenated on the first phase power supply electric wire, in the second phase supply lines and the
The first current sensing means and the second current sensing means are respectively arranged on three phase supply line, the method includes the steps：
S1：Air-conditioning is switched on, and the outdoor controller control compressor is opened；
S2：First current sensing means and the second current sensing means obtain on the second phase supply lines and third phase supply lines in real time
The first current value and the second current value, and first current value and the second current value are sent to the outdoor unit and controlled
Device；
S3：The outdoor controller receives first current value and the second current value, and calculate first current value and
The absolute value of the difference of second current value；
S4：Outdoor controller judges whether the absolute value of the difference is more than preset current threshold, if it is, control institute
Compressor stopping is stated, if it is not, then continuing to keep the compressor operating.
2. according to the method described in claim 1, it is characterized in that, the preset current threshold is：First current value and
The half of higher value in two current values.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610580122.1A CN107248724B (en) | 2016-07-22 | 2016-07-22 | Power phase shortage detection method when a kind of compressor of air conditioner operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610580122.1A CN107248724B (en) | 2016-07-22 | 2016-07-22 | Power phase shortage detection method when a kind of compressor of air conditioner operation |
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| Publication Number | Publication Date |
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| CN107248724A CN107248724A (en) | 2017-10-13 |
| CN107248724B true CN107248724B (en) | 2018-11-13 |
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| CN201610580122.1A Active CN107248724B (en) | 2016-07-22 | 2016-07-22 | Power phase shortage detection method when a kind of compressor of air conditioner operation |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108458452A (en) * | 2018-03-22 | 2018-08-28 | 广东美的制冷设备有限公司 | Air conditioner and its control method and computer readable storage medium |
| CN108444079B (en) * | 2018-03-22 | 2021-10-26 | 广东美的制冷设备有限公司 | Air conditioner, control method thereof, and computer-readable storage medium |
| CN113391139B (en) * | 2021-07-30 | 2022-12-27 | 佛山市顺德区美的电子科技有限公司 | Open-phase detection method and device for three-phase power input line and air conditioner outdoor unit |
| CN113884777A (en) * | 2021-09-22 | 2022-01-04 | 深圳拓邦股份有限公司 | Open-phase detection method, circuit and device of three-phase alternating-current power supply and electrical equipment |
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