CN202524055U - Air-conditioning equipment - Google Patents
Air-conditioning equipment Download PDFInfo
- Publication number
- CN202524055U CN202524055U CN2012202057886U CN201220205788U CN202524055U CN 202524055 U CN202524055 U CN 202524055U CN 2012202057886 U CN2012202057886 U CN 2012202057886U CN 201220205788 U CN201220205788 U CN 201220205788U CN 202524055 U CN202524055 U CN 202524055U
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- current
- air
- conditioning equipment
- compressor
- contactor
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Abstract
The utility model discloses air-conditioning equipment, which comprises a current mutual inductor, a current transformer and a first comparison circuit, wherein the current mutual inductor is used for inducing phase current of a compressor power supply of the air-conditioning equipment so as to obtain an AC induction current; the input end of the current transformer is connected with the output end of the current mutual inductor, and the current transformer is used for converting AC induction current into DC current; and the first comparison circuit is positioned on a mainboard of the air conditioning equipment, wherein the input end of the first comparison circuit is connected with the output end of the current transformer, and the comparison circuit is used for comparing the converted DC current with a preset value and determining whether overcurrent protection of the compressor is started according to the comparison result. The air-conditioning equipment disclosed by the utility model overcomes the defects that a serious consequence that the compressor is burnt is caused because the compressor is in an overcurrent running state for a long time possibly under the condition that the temperature protection action of a screw unit is not started, further prevents overcurrent from occurring through detecting the operation current state of the compressor and well protects the compressor, thereby further prolonging the service life of the air-conditioning equipment.
Description
Technical field
The utility model relates to field of air conditioning, more specifically, relates to a kind of air-conditioning equipment.
Background technology
In the existing screw rod unit; What the overcurrent protection function of unit relied on is thermal relay; The trigger condition of the defencive function of thermal relay is single, when having only the thermal relay temperature that causes when the unit over-current and-load to rise to a certain setting threshold values, and just startup of protection action; Because the rising of temperature is a process values; Overcurrent of compressor itself operation possibly exist but unit is not protected during this, if the long-term situation that this compressor overcurrent occurs and do not protect can cause the serious consequence of burning compressor.
In the screw rod unit course of work, after A.C. contactor was connected electricity a period of time, when temperature rose to a certain value, contact site branch wherein was sticked together, and the situation that A.C. contactor burns out promptly takes place.Antiseized connecting plate be exactly temperature at A.C. contactor rise to stick together before, start the protection action, A.C. contactor is broken off to play the effect of protection A.C. contactor.
Under the situation that the temperature protection action of screw rod unit is not opened, compressor possibly be in overcurrent operation, the serious consequence that causes burning compressor for a long time.Further, antiseized connecting plate is provided with separately, and cost is higher, is unfavorable for reducing the unit cost.
The utility model content
The utility model aims to provide a kind of air-conditioning equipment, and to solve at least under the situation that the action of the temperature protection of screw rod unit is not opened, compressor possibly be in the overcurrent operation for a long time, causes burning the problem of the serious consequence of compressor.
An aspect according to the utility model provides a kind of air-conditioning equipment, comprising: current transformer is used for the phase current of the compressor power of said air-conditioning equipment is responded to obtain an alternating current impression electric current; Current transducer, input links to each other with the output of said current transformer, is used for said alternating current impression electric current is converted into direct current; First comparison circuit is positioned on the mainboard of said air-conditioning equipment, and its input links to each other with the output of said current transducer, is used for the direct current after transforming is compared with preset value, determines whether to start the overcurrent protection of said compressor according to comparative result.
Preferably, the phase current of said compressor power is any phase in the compressor power three-phase.
Preferably, the span of said direct current is 4mA to 24mA.
What preferably, said air-conditioning equipment adopted is the water-cooling screw rod unit.
Preferably, be integrated with the anti functional module of A.C. contactor on the mainboard of said air-conditioning equipment.
Preferably, said anti functional module comprises:
Temperature detecting unit is used to detect the temperature of said A.C. contactor;
Performance element is used for the temperature of detected said A.C. contactor is compared with an A.C. contactor adhesion predetermined temperature value before takes place, and determines whether to break off said A.C. contactor according to comparative result.
Preferably, the induction ratio of current transformer is 600: 5.
Preferably, the ratio of current transducer is 5000: 24.
The utility model has adopted air-conditioning equipment; This air-conditioning equipment can be converted into direct current with phase current; And DC current values that obtains and preset current value compared, judge both sizes, if direct current is greater than preset value; The compressor that then shows this moment is in the overcurrent operating state, then starts the compressor overcurrent protection function.Through using above-mentioned air-conditioning equipment; Overcome under the situation that the temperature protection action of screw rod unit is not opened; Compressor possibly be in overcurrent operation for a long time, causes burning the problem of the serious consequence of compressor, and then can be through detecting the generation that the compressor operating current status prevent overcurrent; Well protect compressor, and then prolonged the useful life of air-conditioning equipment.
Description of drawings
Accompanying drawing is used to provide the further understanding to the utility model, constitutes the application's a part, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 shows the flow chart of method of the compressor overcurrent protection of the utility model embodiment air-conditioning equipment;
Fig. 2 shows the flow chart of method of the compressor overcurrent protection of the utility model preferred embodiment air-conditioning equipment;
Fig. 3 shows the structural representation of the utility model embodiment air-conditioning equipment;
Fig. 4 shows the link position sketch map of current transformer in air-conditioning equipment in the utility model embodiment air-conditioning equipment; And
Fig. 5 shows the link position sketch map of current transducer in air-conditioning equipment in the utility model embodiment air-conditioning equipment.
Embodiment
Below with reference to accompanying drawing and combine embodiment, specify the utility model.
Under the situation that action is not opened based on the temperature protection of screw rod unit; Compressor possibly be in the overcurrent operation for a long time; Cause burning the problem of the serious consequence of compressor; The utility model provides a kind of method of compressor overcurrent protection of air-conditioning equipment, and its flow process is as shown in Figure 1, comprises that step S102 is to step S106:
Step S102 responds to obtain an alternating current impression electric current the phase current of compressor power;
Step S104 is converted into direct current with the alternating current impression electric current;
Whether step S106, the direct current after judge transforming greater than preset value, if then start the overcurrent protection function of compressor.
Present embodiment has adopted air-conditioning equipment; This air-conditioning equipment can be converted into direct current with phase current; And DC current values that obtains and preset current value compared, judge both sizes, if direct current is greater than preset value; The compressor that then shows this moment is in the overcurrent operating state, then starts the compressor overcurrent protection function.Through using above-mentioned air-conditioning equipment; Overcome under the situation that the temperature protection action of screw rod unit is not opened; Compressor possibly be in overcurrent operation for a long time, causes burning the problem of the serious consequence of compressor, and then can be through detecting the generation that the compressor operating current status prevent overcurrent; Well protect compressor, and then prolonged the useful life of air-conditioning equipment.
The enforcement of step S102 be through current transformer to wherein responding to mutually in the compressor three phase mains, reduce to lower alternating current through the electric current behind the current transformer by bigger electric current, promptly obtained an alternating current impression electric current.One of above-mentioned indication is any phase in the three phase mains mutually; Under passable situation; Each that can be in three phase mains all is provided with a current transformer, then under different situations, can optionally obtain the induced current of needed that phase, makes it more flexible.
The process that in step S104, the alternating current impression electric current is converted into direct current can comprise following processing: the alternating current impression electric current is inputed to a current transducer, after the adjusting of current transducer, mutual inductance, be converted into DC current.After obtaining direct current, execution in step S106.Wherein, the span of direct current is 4mA to 24mA.
Step S106 can comprise following processing: the direct current after will transforming exports the mainboard of air-conditioning equipment to; Mainboard is compared the value of detected direct current with preset value, judge the value of direct current and the size of preset value; If DC current values more than or equal to preset value, then starts the overcurrent protection function of compressor.If the value of direct current, shows then that compressor is in the state of trouble free service less than preset value, at this moment, continue to carry out monitoring (judging the value of direct current and the magnitude relationship of preset value).
What above-mentioned air-conditioning equipment adopted is the water-cooling screw rod unit.In the implementation process; The anti function of integrated A.C. contactor is carried out the overcurrent protection of water-cooling screw rod unit on can the mainboard through air-conditioning equipment; Promptly when temperature that mainboard detects A.C. contactor rises to the predetermined temperature value before the A.C. contactor adhesion takes place, break off A.C. contactor.Said process has been used the comparison of temperature value, in the process of using air-conditioning equipment, further compressor is protected.When the temperature no show, can judge whether to open overcurrent protection through current ratio, when temperature reaches and electric current when surpassing preset value, can launch temperature protection function through C.T again, the screw rod unit is protected.
Below in conjunction with preferred embodiment and Fig. 2 above-mentioned execution mode is described further.
Preferred embodiment
This preferred embodiment relates to the Starting mode of the overcurrent protection function of compressor in the water-cooling screw rod unit.
In the present screw rod unit, the overcurrent protection of compressor is realized having only when the temperature of A.C. contactor rises to set point by A.C. contactor, and the compressor overcurrent protection just can start.During this, compressor current may surpass the maximum of compressor and use electric current, but the A.C. contactor temperature does not reach the protection value, makes compressor operating at the over-current and-load state, and of long duration have a risk that compressor burns out.
This preferred embodiment provides a kind of method of compressor overcurrent protection of air-conditioning equipment, comprises that the step S202 shown in Fig. 2 is to step S210:
Step S202 is converted into direct current with the phase current of compressor power.This phase current can be any in the power supply three-phase.
Step S204, whether the direct current after judgement transforms is greater than preset value.If, execution in step S206 then, otherwise execution in step S208.
Step S206, the overcurrent protection function of startup compressor.
Step S208, the temperature of continuation monitoring A.C. contactor judges whether to reach preset value.If reach preset value, execution in step S210 then, otherwise continue execution in step S202.
Step S210 starts the anti defencive function.
Present embodiment is to make comparisons through the phase current of direct detection compressor and the electric current alarming value in the mainboard, and when measured current during greater than alarming value, the compressor overcurrent protection starts.The practical implementation method is a certain current transformer that adds mutually of the compressor in available circuit; The electric current that current transformer records is recorded by current transducer after adjusting; The measured value of this moment is made comparisons after can being detected by mainboard and with the set point in the mainboard between 4mA～24mA.When measured value during greater than the mainboard set point, the compressor protection action launching.
Present embodiment has been cancelled antiseized connecting plate structure independently has been set, and its function is integrated on the mainboard of air-conditioning equipment, and when the temperature that detects A.C. contactor when mainboard had risen to and burnt out temperature, mainboard sent the order that A.C. contactor breaks off, and A.C. contactor breaks off.The structure that is integrated on the mainboard has also reduced processing cost when playing a protective role equally.
Embodiment one
Detect the wherein electric current of a phase of compressor power three-phase; Through after ratio is the induction of 600: 5 current transformers, flow to current transducer with alternating current adjust, mutual inductance, phase current is converted into the direct current of 4mA～24mA; Flowing to mainboard detects; Mainboard is made comparisons detected electric current again with setting electric current, if detect electric current greater than setting electric current, compressor protection action launching.The algorithm that provides below is only for referencial use, and those skilled in the art can use other algorithms to carry out computing according to actual conditions.
Computing formula is following:
wherein; Current transformer induction ratio a=600: 5; Current transducer ratio b=5000: 24, compressor overcurrent protection value is set at 10mA in the mainboard.During compressor phase current measured value I=300A, the detected electric current of mainboard then
This moment i=12mA＞10mA, the compressor overcurrent protection starts.
Embodiment two
Detect the wherein electric current of a phase of compressor power three-phase; Through after ratio is the induction of 800: 5 current transformers, flow to current transducer with alternating current adjust, mutual inductance, phase current is converted into the direct current of 4mA～24mA; Flowing to mainboard detects; Mainboard is made comparisons detected electric current again with setting electric current, if detect electric current greater than setting electric current, compressor protection action launching.
Computing formula is following:
wherein; Current transformer induction ratio a=600: 5; Current transducer ratio b=5000: 24, compressor overcurrent protection value is set at 10mA in the mainboard.During compressor phase current measured value I=225A, the detected electric current of mainboard then
This moment i=9mA＜10mA, compressor does not start overcurrent protection function.
By the temperature (having protected action by the antiseized temperature that detects A.C. contactor of winning in succession) of mainboard detection A.C. contactor before, when detected temperature reached the protection temperature, mainboard was given an order, start-up temperature protection action.
The utility model embodiment also provides a kind of air-conditioning equipment; Its structural representation (only having provided each annexation signal in the sketch map) as shown in Figure 3; Comprise: current transformer 10 (TA) is used for the phase current of the compressor power of air-conditioning equipment is responded to obtain an alternating current impression electric current; Current transducer 20 (TCi), input links to each other with the output of current transformer 10, is used for the alternating current impression electric current is converted into direct current; Comparison circuit 30 is positioned on the mainboard of air-conditioning equipment, and its input links to each other with the output of current transducer 20, is used for the direct current after transforming is compared with preset value, determines whether to start the overcurrent protection of compressor according to comparative result.Wherein, the span of direct current is 4mA to 24mA.
What above-mentioned air-conditioning equipment adopted is the water-cooling screw rod unit.
On the mainboard of air-conditioning equipment, also be integrated with the anti function of A.C. contactor, when temperature that mainboard detects A.C. contactor rises to the predetermined temperature value before the A.C. contactor adhesion takes place, break off A.C. contactor.This function that is provided with the independent antiseized connecting plate that is provided with is integrated on the mainboard, has reduced the unit cost.
In the practical implementation process, current transformer 10 is provided with respectively like Fig. 4 and shown in Figure 5 with current transducer 20.Fig. 4 shows the be provided with position of current transformer 10 at air-conditioning equipment, and TA can be arranged on arbitrary in the three phase mains and go up mutually, and during air-conditioning work, the electric current current transformer 10 of flowing through obtains the alternating current impression electric current.Only show the position that is provided with of current transformer 10 among Fig. 4, after having obtained the alternating current impression electric current, this electric current sent into current transducer 20, current transducer 20 that the position is set is as shown in Figure 5.Wherein, Fig. 4 is connected with the B line through the A line with Fig. 5.Treated electric current is delivered to the current transducer 20 among Fig. 5 through A line and B line among Fig. 4, and electric current is converted into direct current, and this electric current is sent into comparison circuit 30 compares.Remainder is the internal structure of air-conditioning equipment among the figure, is not elaborated here, and those skilled in the art can be according to clear and definite current transformer 10 of the signal among Fig. 4 and Fig. 5 and the position of current transducer 20 at air-conditioning equipment.Above-mentioned comparison circuit 30 can independently be arranged on the mainboard, also can combine with the internal structure of mainboard, and the interrelated function that realizes comparison circuit through function is not elaborated here.
From above description, can find out that the utility model the above embodiments have realized following technique effect:
The utility model embodiment over-current and-load occurs in the compressor long-time running process; But the phenomenon that unit is not protected increases a kind of electric current detecting method, and the running current of compressor is limited to below a certain set point; Play the purpose of protection compressor; Promptly detect the compressor operating current status, prevent overcurrent, play the effect of protection compressor.On the other hand, also cancel antiseized connecting plate, and the anti function is integrated into mainboard, realize, reduced the unit cost by mainboard.Through the utilization of present embodiment, well protected compressor, and then prolonged the useful life of air-conditioning equipment.
Obviously; Each module or each step that it is apparent to those skilled in the art that above-mentioned the utility model can realize that they can concentrate on the single calculation element with the general calculation device; Perhaps be distributed on the network that a plurality of calculation element forms; Alternatively, they can be realized with the executable program code of calculation element, carried out by calculation element thereby can they be stored in the storage device; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the utility model is not restricted to any specific hardware and software combination.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the utility model.
Claims (8)
1. an air-conditioning equipment is characterized in that, comprising:
Current transformer is used for the phase current of the compressor power of said air-conditioning equipment is responded to obtain an alternating current impression electric current;
Current transducer, input links to each other with the output of said current transformer, is used for said alternating current impression electric current is converted into direct current;
First comparison circuit is positioned on the mainboard of said air-conditioning equipment, and its input links to each other with the output of said current transducer, is used for the direct current after transforming is compared with preset value, determines whether to start the overcurrent protection of said compressor according to comparative result.
2. air-conditioning equipment according to claim 1 is characterized in that, the phase current of said compressor power is any phase in the compressor power three-phase.
3. air-conditioning equipment according to claim 1 is characterized in that, the span of said direct current is 4mA to 24mA.
4. air-conditioning equipment according to claim 1 is characterized in that, what said air-conditioning equipment adopted is the water-cooling screw rod unit.
5. air-conditioning equipment according to claim 4 is characterized in that, is integrated with the anti functional module of A.C. contactor on the mainboard of said air-conditioning equipment.
6. air-conditioning equipment according to claim 5 is characterized in that, said anti functional module comprises:
Temperature detecting unit is used to detect the temperature of said A.C. contactor;
Performance element is used for the temperature of detected said A.C. contactor is compared with an A.C. contactor adhesion predetermined temperature value before takes place, and determines whether to break off said A.C. contactor according to comparative result.
7. according to each described air-conditioning equipment in the claim 1 to 6, it is characterized in that the induction ratio of current transformer is 600: 5.
8. according to each described air-conditioning equipment in the claim 1 to 6, it is characterized in that the ratio of current transducer is 5000: 24.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202057886U CN202524055U (en) | 2012-05-08 | 2012-05-08 | Air-conditioning equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202057886U CN202524055U (en) | 2012-05-08 | 2012-05-08 | Air-conditioning equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202524055U true CN202524055U (en) | 2012-11-07 |
Family
ID=47106984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202057886U Withdrawn - After Issue CN202524055U (en) | 2012-05-08 | 2012-05-08 | Air-conditioning equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202524055U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388579A (en) * | 2012-05-08 | 2013-11-13 | 珠海格力电器股份有限公司 | Compressor over-current protection method for air conditioning equipment and air conditioning equipment |
| CN111780338A (en) * | 2020-07-13 | 2020-10-16 | 珠海格力电器股份有限公司 | Control method and device of air conditioner |
-
2012
- 2012-05-08 CN CN2012202057886U patent/CN202524055U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388579A (en) * | 2012-05-08 | 2013-11-13 | 珠海格力电器股份有限公司 | Compressor over-current protection method for air conditioning equipment and air conditioning equipment |
| CN103388579B (en) * | 2012-05-08 | 2016-03-23 | 珠海格力电器股份有限公司 | The method of the compressor overcurrent protection of air-conditioning equipment and air-conditioning equipment |
| CN111780338A (en) * | 2020-07-13 | 2020-10-16 | 珠海格力电器股份有限公司 | Control method and device of air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121107 Effective date of abandoning: 20160323 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |