CN105465951A - Method and device for protecting compressor - Google Patents
Method and device for protecting compressor Download PDFInfo
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- CN105465951A CN105465951A CN201510918466.4A CN201510918466A CN105465951A CN 105465951 A CN105465951 A CN 105465951A CN 201510918466 A CN201510918466 A CN 201510918466A CN 105465951 A CN105465951 A CN 105465951A
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- current value
- compressor
- complete machine
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- sampled point
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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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a method and device for protecting a compressor. The method comprises the steps that after the compressor receives turnoff signals, the whole machine current value of a mutual inductor in an air conditioner indoor unit is detected within the preset time period; whether the whole machine current value detected within the preset time period is within the preset current value range or not is judged; and according to the judgment result, control instructions are transmitted to the compressor. According to the method and device for protecting the compressor, whether adhesion of an alternating current contactor happens or not is effectively detected without additionally installing devices, and the purpose of protecting the compressor is achieved accordingly.
Description
Technical field
The present invention relates to technical field of automatic control, in particular to a kind of method and the device of protecting compressor.
Background technology
Traditional low power air-conditioner is to control the break-make of circuit between compressor and power supply by relay; compressor instruction is closed when air-conditioning master controller sends; can by relay coil power-off; two contacts after coil loses magnetism in relay can reset under the action of the spring; circuit between compressor and power supply is disconnected, realizes compressor power-off and shut down.And along with the power of air-conditioning increasing, some powerful air-conditionings or central air-conditioning are generally the compressors of employing more than 3, and traditional relay obviously cannot meet the demands, therefore adopt A.C. contactor to carry out the break-make of control circuit.A.C. contactor principle and relay similar, be also rely on coil electricity absorption contact, coil blackout spring break contact.
But in actual motion, the A.C. contactor of the air-conditioner elastic force of back-moving spring that often because the electric current passed through is excessive, cohesive force between contact and contact exceeded, cause coil blackout rear spring two contacts cannot be separated from, or the quality problems due to A.C. contactor make contact to be separated from, and namely the sticky of A.C. contactor occur.Once the sticky connection of A.C. contactor, compressor will continue operation and cannot shut down, and the blower fan of indoor heat exchanger and outdoor heat exchanger has stopped and cannot heat exchange, makes compressor return liquid in a large number, so can destroy compressor for a long time.In order to protect compressor; often through setting up the current inductor be electrically connected with main controller within the compressor in prior art; whether 0A is greater than with the electric current detecting compressor; when the compressor current detected is greater than 0A within a period of time continued; then assert that A.C. contactor there occurs adhesion, causes compressor to shut down.
But, there is following problem in above-mentioned prior art: the electric current detecting compressor by setting up current inductor within the compressor, the cost of manufacture increasing compressor can to even may to need to change the internal structure of compressor, often not too convenient in the specific implementation.
For the problems referred to above, at present effective settling mode is not yet proposed.
Summary of the invention
Embodiments provide a kind of method protecting compressor, whether when not setting up extra means, effectively detect A.C. contactor and stick together, to reach the object of protection compressor, the method comprises:
After compressor receives cut-off signals, in preset period of time, detect the complete machine current value in air-conditioning internal machine on transformer; Judge whether the complete machine current value detected in described preset period of time meets pre-set current value scope; According to the result judged, assign control instruction to described compressor.
In one embodiment, it is described after compressor receives cut-off signals, the complete machine current value detected in preset period of time in air-conditioning internal machine on transformer specifically comprises: after compressor receives cut-off signals, in preset period of time, arrange multiple sampled point according to presetting the sampling period;
Each sample point in described multiple sampled point, detects the complete machine current value on transformer in air-conditioning internal machine.
In one embodiment, describedly judge whether the complete machine current value detected in described preset period of time meets pre-set current value scope and specifically comprise: judge whether the described complete machine current value that each sample point in described multiple sampled point detects meets pre-set current value scope.
In one embodiment, described pre-set current value scope is 1.5A to 5A.
In one embodiment, the described result according to judging, assign control instruction to described compressor specifically to comprise: when the described complete machine current value that each sample point in described multiple sampled point detects all is greater than the maximum current value in described pre-set current value scope, detect the environment temperature of current time; When described environment temperature is greater than preset temperature threshold value, assign the concurrent alarm that is out of order of refrigeration instruction to described compressor.
In one embodiment, the described result according to judging, assign control instruction to described compressor specifically to comprise: when the described complete machine current value that each sample point in described multiple sampled point detects all is greater than the maximum current value in described pre-set current value scope, detect the environment temperature of current time; When described environment temperature is less than or equal to preset temperature threshold value, assigns to described compressor and heat the concurrent alarm that is out of order of instruction.
The embodiment of the present invention additionally provides a kind of device protecting compressor, and whether when not setting up extra means, effectively detect A.C. contactor and stick together, to reach the object of protection compressor, this device comprises:
Complete machine current value detecting unit, for after compressor receives cut-off signals, detects the complete machine current value in air-conditioning internal machine on transformer in preset period of time; Judging unit, for judging whether the complete machine current value detected in described preset period of time meets pre-set current value scope; Control instruction assigns unit, for according to the result judged, assigns control instruction to described compressor.
In one embodiment, described complete machine current value detecting unit specifically comprises: sampled point arranges module, for after compressor receives cut-off signals, in preset period of time, arranges multiple sampled point according to presetting the sampling period; Detection module, for each sample point in described multiple sampled point, detects the complete machine current value on transformer in air-conditioning internal machine.
In one embodiment, whether the described complete machine current value that described judging unit detects for each sample point judged in described multiple sampled point meets pre-set current value scope.
In one embodiment, described control instruction is assigned unit and is specifically comprised: environment temperature detection module, for when the described complete machine current value that each sample point in described multiple sampled point detects all is greater than the maximum current value in described pre-set current value scope, detect the environment temperature of current time; Processing module, for when described environment temperature is greater than preset temperature threshold value, assigns the concurrent alarm that is out of order of refrigeration instruction to described compressor.
According to a kind of method and device protecting compressor of the present invention, utilize the transformer on air-conditioning internal machine can detect the current value of air conditioner when not setting up extra means.By judging the current value of air conditioner, not only can judge whether A.C. contactor sticks together, the inside and outside blower fan of air-conditioning can also be made simultaneously in the power-offstate to continue to run, to ensure evaporator dry.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
A kind of method flow diagram protecting compressor that Fig. 1 provides for the embodiment of the present application;
A kind of apparatus function module map protecting compressor that Fig. 2 provides for the embodiment of the present application.
Detailed description of the invention
Technical scheme in the application is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making other embodiments all obtained under creative work prerequisite, all should belong to the scope of the application's protection.
A kind of method flow diagram protecting compressor that Fig. 1 provides for the embodiment of the present application.Although hereafter describe flow process to comprise the multiple operations occurred with particular order, but should have a clear understanding of, these processes can comprise more or less operation, and these operations can sequentially perform or executed in parallel (such as using parallel processor or multi-thread environment).As shown in Figure 1, described method can comprise:
S1: after compressor receives cut-off signals, detects the complete machine current value in air-conditioning internal machine on transformer in preset period of time.
When air conditioner normally works, the live wire of power line is often connected with the transformer in air-conditioning internal machine.Higher electric current can be converted to electric current required when air conditioner normally works by transformer.The line principle of transformer and transformer ' s type seemingly, can carry out work according to electromagnetic induction principle, and only transformer conversion is electric current.Along with the change of the load be connected with transformer, the current value on transformer also can correspondingly change.The embodiment of the present application just after compressor receives cut-off signals, can detect the complete machine current value in air-conditioning internal machine on transformer in preset period of time.After compressor receives cut-off signals, the voltage at A.C. contactor two ends can reduce, and the contact of A.C. contactor also can be separated, thus compressor is quit work.But, under low voltage condition, because the electromagnetic force of A.C. contactor not, thus may cause the phenomenon occurring loose contact between contact, to such an extent as to form arcing between contacts.Along with the further reduction of voltage, then may there is resilience fast in contact, the arcing existed in make and break process can cause heat accumulation continually, thus the coating of contact is melted, and causes contact adhesion together, cannot normal separation.Like this, after compressor receives cut-off signals, in fact do not quit work.Along with inside and outside blower fan is out of service successively, thus make the temperature of compressor too high, compressor can start and stop continually, cause the life-span to reduce.
A.C. contactor contact adhesion together time, compressor still in work, can make after cut-off signals is assigned like this, and the electric current on transformer is still larger.Under normal circumstances, after cut-off signals is assigned, if compressor quits work, the complete machine current value so on transformer is often in the current value range of 1.5A to 5A.If compressor does not quit work, the complete machine electricity value so on transformer then can higher than 5A.Based on this, the embodiment of the present application after compressor receives cut-off signals, can arrange multiple sampled point according to presetting the sampling period in preset period of time.Described preset period of time can be such as 3 seconds, and the object arranging preset period of time is the complete machine current value detected continuously on transformer, and the complete machine current value detected to avoid the single moment exists abnormal.The described default sampling period can be arranged according to the duration of described preset period of time, and such as described preset period of time was 3 seconds, and the so described default sampling period just can be 500 milliseconds, can arrange 6 sampled points like this in the duration in 3 seconds.
After being provided with multiple sampled point, just can each sample point in described multiple sampled point, detect the complete machine current value on transformer in air-conditioning internal machine.6 sample point as escribed above, can detect 6 complete machine current values accordingly.
S2: judge whether the complete machine current value detected in described preset period of time meets pre-set current value scope.
Due under normal circumstances, after cut-off signals is assigned, if compressor quits work, the complete machine current value so on transformer is often in the current value range of 1.5A to 5A.Just 1.5A to 5A can be chosen to be described pre-set current value scope so in the embodiment of the present application.Then the complete machine current value detected in described preset period of time and this pre-set current value scope can be compared, thus can judge whether the complete machine current value detected meets this pre-set current value scope.
Particularly, the embodiment of the present application by the method for simulation, can gather the change waveform of the complete machine current value in described preset period of time on transformer, and judges whether this waveform is positioned at default current value range.In addition, the embodiment of the present application according to the discrete method arranging sampled point in step S1 in preset period of time, can also judge whether the described complete machine current value that each sample point in described multiple sampled point detects meets pre-set current value scope.When the described complete machine current value that each sample point in described multiple sampled point detects all falls into pre-set current value scope, then can judge that A.C. contactor does not stick together, compressor can normally quit work; When the described complete machine current value that each sample point in described multiple sampled point detects all is greater than the maximum current value in described pre-set current value scope, 6 complete machine electric currents that such as 6 sampled points are corresponding be all greater than 5A, so then can judge that A.C. contactor there occurs adhesion, now compressor is also in running order, does not normally quit work.
S3: according to the result judged, assign control instruction to described compressor.
The described complete machine current value that each sample point in described multiple sampled point detects all is greater than the maximum current value in described pre-set current value scope, when judging that A.C. contactor there occurs adhesion, then need to take further operation, avoid repetition start and stop to make compressor.Now, the embodiment of the present application can detect the environment temperature of current time, and described environment temperature can be such as the indoor temperature residing for air-conditioning internal machine.When described environment temperature is greater than preset temperature threshold value, then can judges that now environment temperature is higher, thus refrigeration instruction can be assigned to described compressor, to keep compressor to work on, avoid repetition start and stop.Particularly, described preset temperature threshold value such as can be set to 16 DEG C, when the environment temperature detected is higher than 16 DEG C, just assigns refrigeration instruction from compressor described in trend, and air-conditioning internal machine can send fault alarm prompting simultaneously.Described fault alarm prompting can be buzzing prompt tone, also can be shown in the failure code on air-conditioning display or the combination both it.To point out user now should unplug plug, prevent compressor from after receiving cut-off signals, repeating start and stop.
Similarly, when described environment temperature is less than or equal to preset temperature threshold value, can assigns to described compressor and heat the concurrent alarm that is out of order of instruction.When environment temperature is less than or equal to preset temperature threshold value, can judge that now environment temperature is on the low side, thus can assign to described compressor and heat instruction, to keep compressor to work on, avoid repetition start and stop.Send fault alarm prompting simultaneously and can show that user unplugs plug.
It should be noted that, in the embodiment of the present application, described pre-set current value scope can be set to 1.5A to 5A, instead of 0A, in the power-offstate, the inside and outside blower fan of air-conditioning can be allowed to continue to run under drying mode, thus can evaporator dry be ensured like this.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
Utilize the transformer on air-conditioning internal machine can detect the current value of air conditioner when not setting up extra means.By judging the current value of air conditioner, not only can judge whether A.C. contactor sticks together, the inside and outside blower fan of air-conditioning can also be made simultaneously in the power-offstate to continue to run, to ensure evaporator dry.
The embodiment of the present application also provides a kind of device protecting compressor.A kind of apparatus function module map protecting compressor that Fig. 2 provides for the embodiment of the present application.As shown in Figure 2, described device comprises:
Complete machine current value detecting unit 100, for after compressor receives cut-off signals, detects the complete machine current value in air-conditioning internal machine on transformer in preset period of time;
Judging unit 200, for judging whether the complete machine current value detected in described preset period of time meets pre-set current value scope;
Control instruction assigns unit 300, for according to the result judged, assigns control instruction to described compressor.
In the application one preferred embodiment, described complete machine current value detecting unit 100 specifically comprises:
Sampled point arranges module, for after compressor receives cut-off signals, in preset period of time, arranges multiple sampled point according to presetting the sampling period;
Detection module, for each sample point in described multiple sampled point, detects the complete machine current value on transformer in air-conditioning internal machine.
Correspondingly, in another preferred embodiment of the application, described judging unit 200 may be used for judging whether the described complete machine current value that each sample point in described multiple sampled point detects meets pre-set current value scope.
In another preferred embodiment of the application, described control instruction is assigned unit 300 and is specifically comprised:
Environment temperature detection module, for when the described complete machine current value that each sample point in described multiple sampled point detects all is greater than the maximum current value in described pre-set current value scope, detects the environment temperature of current time;
Processing module, for when described environment temperature is greater than preset temperature threshold value, assigns the concurrent alarm that is out of order of refrigeration instruction to described compressor.
Similarly, described processing module can also be used for when described environment temperature is less than or equal to preset temperature threshold value, assigns heating the concurrent alarm that is out of order of instruction to described compressor.
In addition, the pre-set current value scope in each embodiment above-mentioned can be 1.5A to 5A.
The specific implementation flow process of each functional module above-mentioned is identical with step S1 to S3, just repeats no more here.
As can be seen from the above description, the embodiment of the present invention achieves following technique effect: utilize the transformer on air-conditioning internal machine can detect the current value of air conditioner when not setting up extra means.By judging the current value of air conditioner, not only can judge whether A.C. contactor sticks together, the inside and outside blower fan of air-conditioning can also be made simultaneously in the power-offstate to continue to run, to ensure evaporator dry.
Obviously, those skilled in the art should be understood that, each module of the above-mentioned embodiment of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the embodiment of the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the embodiment of the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. protect a method for compressor, it is characterized in that, comprising:
After compressor receives cut-off signals, in preset period of time, detect the complete machine current value in air-conditioning internal machine on transformer;
Judge whether the complete machine current value detected in described preset period of time meets pre-set current value scope;
According to the result judged, assign control instruction to described compressor.
2. the method for claim 1, is characterized in that, described after compressor receives cut-off signals, and the complete machine current value detected in preset period of time in air-conditioning internal machine on transformer specifically comprises:
After compressor receives cut-off signals, in preset period of time, multiple sampled point is set according to presetting the sampling period;
Each sample point in described multiple sampled point, detects the complete machine current value on transformer in air-conditioning internal machine.
3. method as claimed in claim 2, is characterized in that, describedly judges whether the complete machine current value detected in described preset period of time meets pre-set current value scope and specifically comprise:
Judge whether the described complete machine current value that each sample point in described multiple sampled point detects meets pre-set current value scope.
4. method as claimed any one in claims 1 to 3, it is characterized in that, described pre-set current value scope is 1.5A to 5A.
5. method as claimed in claim 3, is characterized in that, the described result according to judging, assigns control instruction specifically comprise to described compressor:
When the described complete machine current value that each sample point in described multiple sampled point detects all is greater than the maximum current value in described pre-set current value scope, detect the environment temperature of current time;
When described environment temperature is greater than preset temperature threshold value, assign the concurrent alarm that is out of order of refrigeration instruction to described compressor.
6. method as claimed in claim 3, is characterized in that, the described result according to judging, assigns control instruction specifically comprise to described compressor:
When the described complete machine current value that each sample point in described multiple sampled point detects all is greater than the maximum current value in described pre-set current value scope, detect the environment temperature of current time;
When described environment temperature is less than or equal to preset temperature threshold value, assigns to described compressor and heat the concurrent alarm that is out of order of instruction.
7. protect a device for compressor, it is characterized in that, comprising:
Complete machine current value detecting unit, for after compressor receives cut-off signals, detects the complete machine current value in air-conditioning internal machine on transformer in preset period of time;
Judging unit, for judging whether the complete machine current value detected in described preset period of time meets pre-set current value scope;
Control instruction assigns unit, for according to the result judged, assigns control instruction to described compressor.
8. device as claimed in claim 7, it is characterized in that, described complete machine current value detecting unit specifically comprises:
Sampled point arranges module, for after compressor receives cut-off signals, in preset period of time, arranges multiple sampled point according to presetting the sampling period;
Detection module, for each sample point in described multiple sampled point, detects the complete machine current value on transformer in air-conditioning internal machine.
9. device as claimed in claim 8, is characterized in that, whether the described complete machine current value that described judging unit detects for each sample point judged in described multiple sampled point meets pre-set current value scope.
10. device as claimed in claim 9, it is characterized in that, described control instruction is assigned unit and is specifically comprised:
Environment temperature detection module, for when the described complete machine current value that each sample point in described multiple sampled point detects all is greater than the maximum current value in described pre-set current value scope, detects the environment temperature of current time;
Processing module, for when described environment temperature is greater than preset temperature threshold value, assigns the concurrent alarm that is out of order of refrigeration instruction to described compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510918466.4A CN105465951B (en) | 2015-12-11 | 2015-12-11 | A kind of method and device of protection compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510918466.4A CN105465951B (en) | 2015-12-11 | 2015-12-11 | A kind of method and device of protection compressor |
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| CN105465951A true CN105465951A (en) | 2016-04-06 |
| CN105465951B CN105465951B (en) | 2018-08-03 |
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| CN201510918466.4A Active CN105465951B (en) | 2015-12-11 | 2015-12-11 | A kind of method and device of protection compressor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106839334A (en) * | 2017-03-07 | 2017-06-13 | 青岛海尔空调器有限总公司 | A kind of air-conditioner self-protecting device and the air-conditioner with the self-protecting device |
| CN111023449A (en) * | 2019-11-25 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Snow removal control method and device and air conditioner |
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| CN111023449A (en) * | 2019-11-25 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Snow removal control method and device and air conditioner |
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| CN105465951B (en) | 2018-08-03 |
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