CN204789717U - Air conditioner and current detection device of indoor set and indoor direct current fan thereof - Google Patents
Air conditioner and current detection device of indoor set and indoor direct current fan thereof Download PDFInfo
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- CN204789717U CN204789717U CN201520431189.XU CN201520431189U CN204789717U CN 204789717 U CN204789717 U CN 204789717U CN 201520431189 U CN201520431189 U CN 201520431189U CN 204789717 U CN204789717 U CN 204789717U
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Abstract
The utility model discloses an air conditioner in the current detection device of indoor direct current fan, it includes: current sampling circuit, current sampling circuit include the sampling resistor, the one end ground connection of sampling resistor, and the other end of sampling resistor links to each other with IPM's three current sample end respectively, current sampling circuit be used for sampling direct current motor's three phase current's stack wave form, the electric current treatment circuit, the electric current treatment circuit is handled with the stack wave form to three phase current with the other end of sampling resistor is continuous, the controller, the controller links to each other with the electric current treatment circuit, and the controller carries out the three phase current wave form of electric current reconsitution in order to obtain direct current motor according to the three phase current's after handling stack wave form. This current detection device just only can realize that not only circuit structure is simple to direct current motor three phase current's detection through single resistance, moreover greatly reduced the cost. The utility model also discloses an indoor set that above -mentioned current detection device's air conditioner has and an air conditioner that one kind has this indoor set.
Description
Technical field
The utility model relates to air-conditioning technical field, particularly in a kind of air conditioner indoor DC fan current sensing means, a kind of there is the indoor set of the air conditioner of this current sensing means and a kind of air conditioner.
Background technology
The external drived control mode of current indoor DC fan has two kinds, a kind of is the motor rotor position utilizing Hall element to come in sensing chamber in DC fan, another kind is the three-phase current utilizing motor in DC fan in three noninductive resistance sampler chambers, then detects motor rotor position according to the three-phase current of motor.
First kind of way not only cost is high, and Hall element assembling is inconvenient; The second way does not need Hall element, but needs the three-phase current waveform being carried out sample motor by three resistance, and cost is still higher.
Utility model content
The utility model is intended to solve one of technical matters in above-mentioned technology at least to a certain extent.For this reason, an object of the present utility model is to propose a kind of current sensing means with indoor DC fan in the low air conditioner of cost.
Another object of the present utility model is the indoor set proposing a kind of air conditioner.An also object of the present utility model is to propose a kind of air conditioner.
For achieving the above object, the utility model proposes the current sensing means of indoor DC fan in a kind of air conditioner on the one hand, wherein, IPM (the IntelligentPowerModule that described indoor DC fan comprises direct current generator and is connected with described direct current generator, Intelligent Power Module), described IPM has three current sample ends, described current sensing means comprises: current sampling circuit, described current sampling circuit comprises sampling resistor, one end ground connection of described sampling resistor, the other end of described sampling resistor is connected with described three current sample ends respectively, described current sampling circuit is in order to the overlaid waveforms of the three-phase current of described direct current generator of sampling, current processing circuits, described current processing circuits is connected to process the overlaid waveforms of described three-phase current with the other end of described sampling resistor, controller, described controller is connected with described current processing circuits, and described controller carries out electric current reconstructing to obtain the three-phase current waveform of described direct current generator according to the overlaid waveforms of the three-phase current after process.
According to the current sensing means of DC fan indoor in the air conditioner that the utility model proposes, by the overlaid waveforms of three-phase current of single resistance and sampling resistor sampling direct current generator, controller is sent to after the overlaid waveforms of current processing circuits to three-phase current processes, controller carries out electric current reconstructing to obtain the three-phase current waveform of direct current generator according to the overlaid waveforms of the three-phase current after process, realize the detection to direct current generator three-phase current, thus realize the rotor-position detecting direct current generator, therefore, in air conditioner of the present utility model, the current sensing means of indoor DC fan just can realize the detection to direct current generator three-phase current by means of only single resistance, not only circuit structure is simple, and greatly reduce cost.
Wherein, the current sensing means of indoor DC fan in described air conditioner; also comprise: current foldback circuit; the first end of described current foldback circuit is connected with the other end of described sampling resistor; second end of described current foldback circuit is connected with the trigger protection end of described IPM, wherein, during arbitrary phase current generation overcurrent in the three-phase current of described direct current generator; the trigger voltage that described current foldback circuit exports reaches protection threshold value, triggers described IPM and pins drive singal.
Particularly, described current foldback circuit comprises: the first resistance, and one end of described first resistance is connected with the other end of described sampling resistor; Second resistance, one end of described second resistance is connected with the other end of described first resistance, have first node between one end of described second resistance and the other end of described first resistance, the other end ground connection of described second resistance, described first node is connected with the trigger protection end of described IPM; First electric capacity, described first electric capacity is connected with described second resistor coupled in parallel.
Preferably, described current processing circuits can be operational amplification circuit.
Further, the utility model also proposed a kind of indoor set of air conditioner, and it comprises the current sensing means of indoor DC fan in above-mentioned air conditioner.
The indoor set of air conditioner of the present utility model, adopts the current sensing means of indoor DC fan in above-mentioned air conditioner, just can realize the detection to direct current generator three-phase current, thus greatly reduce cost by means of only single resistance.
In addition, the utility model also proposed a kind of air conditioner, and it comprises the indoor set of above-mentioned air conditioner.
Air conditioner of the present utility model, indoor set adopts the current sensing means of indoor DC fan in above-mentioned air conditioner, just can realize the detection to direct current generator three-phase current like this, thus greatly reduce cost by means of only single resistance.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of three resistance samplings in correlation technique and protection circuit;
Fig. 2 is the circuit diagram of the current sensing means of indoor DC fan in the air conditioner according to the utility model embodiment;
Fig. 3 is the block diagram of the indoor set of air conditioner according to the utility model embodiment; And
Fig. 4 is the block diagram of the air conditioner according to the utility model embodiment.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
Describe the current sensing means of indoor DC fan in the air conditioner proposed according to the utility model embodiment with reference to the accompanying drawings, there is the indoor set of the air conditioner of this current sensing means and there is the air conditioner of this indoor set.
First, three resistance samplings in correlation technique and protection circuit as shown in Figure 1, carry out the three-phase current of direct current generator in DC fan in sampler chamber by three current sampling resistor R85, R82, R78 correspondences.And; three resistance sampling hardware current foldback circuits are made up of D9, D10, D11, R125, R126 and C55; its principle of work is; when in the three-phase current of direct current generator there is overcurrent in any phase current; the voltage correspondence of three current sampling resistors raises; the voltage of overcurrent phase is by after unilateral diode forward conduction; again by resistance R125 and R126 dividing potential drop; if when the voltage after dividing potential drop reaches the overcurrent protection threshold voltage set in IPM; trigger protection; pin drive singal, thus avoid damaging IPM.
But as shown in Figure 1, the detection that three resistance samplings and protection circuit need three current sampling resistors could realize direct current generator three-phase current, not only make circuit structure become complicated, and cost is also high, therefore needs to improve.
For this reason, the utility model embodiment propose air conditioner in indoor DC fan current sensing means as shown in Figure 2.Wherein, the intelligent power module that indoor DC fan comprises direct current generator and is connected with direct current generator, IPM has three current sample ends, is respectively IS1, IS2, IS3.As shown in Figure 2, in this air conditioner, the current sensing means of indoor DC fan comprises: current sampling circuit 10, current processing circuits 20 and controller 30.
Wherein, current sampling circuit 10 comprises sampling resistor Rc, one end ground connection of sampling resistor Rc, the other end of sampling resistor Rc is connected with three current sample ends IS1, IS2, IS3 respectively, and current sampling circuit 10 is in order to the overlaid waveforms of the three-phase current of direct current generator of sampling.Current processing circuits 20 is connected to process the overlaid waveforms of described three-phase current with the other end of sampling resistor Rc, such as, carry out amplification filtering process etc.According to an embodiment of the present utility model, current processing circuits 20 can be operational amplification circuit.
As shown in Figure 2, controller 30 is connected with current processing circuits 20, electric current reconstructing algorithm is preset with in controller 30, controller 30 carries out electric current reconstructing to obtain the three-phase current waveform of described direct current generator according to the overlaid waveforms of the three-phase current after process, thus the detection realized direct current generator three-phase current, and then the rotor-position of direct current generator can be detected.
Wherein, according to an embodiment of the present utility model; as shown in Figure 2; in above-mentioned air conditioner, the current sensing means of indoor DC fan also comprises: current foldback circuit 40; the first end of current foldback circuit 40 is connected with the other end of sampling resistor Rc; second end of current foldback circuit 40 is connected with the trigger protection end RS of IPM; wherein; during arbitrary phase current generation overcurrent in the three-phase current of direct current generator; the trigger voltage that current foldback circuit 40 exports reaches protection threshold value; trigger IPM and pin drive singal, avoid IPM to damage because of overcurrent.
Particularly, current foldback circuit 40 comprises: the first resistance R1, the second resistance R2 and the first electric capacity C1.Wherein, one end of first resistance R1 is connected with the other end of sampling resistor Rc; one end of second resistance R2 is connected with the other end of the first resistance R1; between one end of second resistance R2 and the other end of the first resistance R1, there is first node; the other end ground connection of the second resistance R2; first node is connected with the trigger protection end RS of IPM, and the first electric capacity C1 and the second resistance R2 is connected in parallel.
That is, in embodiment of the present utility model, by the overlaid waveforms of sampling resistor Rc sampling three-phase electric current, then to the three-phase current waveform being obtained direct current generator after the overlaid waveforms process of three-phase current by electric current reconstructing algorithm, thus realize the detection to direct current generator three-phase current.And; current foldback circuit is formed by resistance R1, R2 and electric capacity C1; when there is overcurrent in any phase current in three-phase current; the corresponding rising of three-phase superimposed voltage of sampling resistor Rc, after R1, R2 dividing potential drop, to the trigger protection end RS of IPM; if the voltage of trigger protection end RS reaches protection threshold values; then trigger hardware overcurrent protection, pins drive singal, avoids damaging IPM.
Therefore, contrast from Fig. 2 and Fig. 1, in the air conditioner of the utility model embodiment, not only circuit structure is simple for the current sensing means of indoor DC fan, but also greatly reduces cost.
The current sensing means of indoor DC fan in air conditioner according to the utility model embodiment, by the overlaid waveforms of three-phase current of single resistance and sampling resistor sampling direct current generator, controller is sent to after the overlaid waveforms of current processing circuits to three-phase current processes, controller carries out electric current reconstructing to obtain the three-phase current waveform of direct current generator according to the overlaid waveforms of the three-phase current after process, realize the detection to direct current generator three-phase current, thus realize the rotor-position detecting direct current generator, therefore, in air conditioner of the present utility model, the current sensing means of indoor DC fan just can realize the detection to direct current generator three-phase current by means of only single resistance, not only circuit structure is simple, and greatly reduce cost.
Further, as shown in Figure 3, the utility model embodiment also proposed a kind of indoor set 100 of air conditioner, and it comprises the current sensing means 200 of indoor DC fan in above-mentioned air conditioner.
The indoor set of the air conditioner of the utility model embodiment, adopts the current sensing means of indoor DC fan in above-mentioned air conditioner, just can realize the detection to direct current generator three-phase current, thus greatly reduce cost by means of only single resistance.
In addition, as shown in Figure 4, the utility model embodiment also proposed a kind of air conditioner 300, and it comprises the indoor set 100 of above-mentioned air conditioner.
The air conditioner of the utility model embodiment, indoor set adopts the current sensing means of indoor DC fan in above-mentioned air conditioner, just can realize the detection to direct current generator three-phase current like this, thus greatly reduce cost by means of only single resistance.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In description of the present utility model, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this instructions, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this instructions or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment, revises, replace and modification in scope of the present utility model.
Claims (6)
1. the current sensing means of indoor DC fan in an air conditioner, it is characterized in that, the intelligent power module that described indoor DC fan comprises direct current generator and is connected with described direct current generator, described IPM has three current sample ends, and described current sensing means comprises:
Current sampling circuit, described current sampling circuit comprises sampling resistor, one end ground connection of described sampling resistor, the other end of described sampling resistor is connected with described three current sample ends respectively, and described current sampling circuit is in order to the overlaid waveforms of the three-phase current of described direct current generator of sampling;
Current processing circuits, described current processing circuits is connected to process the overlaid waveforms of described three-phase current with the other end of described sampling resistor;
Controller, described controller is connected with described current processing circuits, and described controller carries out electric current reconstructing to obtain the three-phase current waveform of described direct current generator according to the overlaid waveforms of the three-phase current after process.
2. the current sensing means of indoor DC fan in air conditioner according to claim 1, is characterized in that, also comprise:
Current foldback circuit; the first end of described current foldback circuit is connected with the other end of described sampling resistor; second end of described current foldback circuit is connected with the trigger protection end of described IPM; wherein; during arbitrary phase current generation overcurrent in the three-phase current of described direct current generator; the trigger voltage that described current foldback circuit exports reaches protection threshold value, triggers described IPM and pins drive singal.
3. the current sensing means of indoor DC fan in air conditioner according to claim 2, it is characterized in that, described current foldback circuit comprises:
First resistance, one end of described first resistance is connected with the other end of described sampling resistor;
Second resistance, one end of described second resistance is connected with the other end of described first resistance, have first node between one end of described second resistance and the other end of described first resistance, the other end ground connection of described second resistance, described first node is connected with the trigger protection end of described IPM;
First electric capacity, described first electric capacity is connected with described second resistor coupled in parallel.
4. the current sensing means of indoor DC fan in air conditioner according to claim 1, it is characterized in that, described current processing circuits is operational amplification circuit.
5. an indoor set for air conditioner, is characterized in that, comprises the current sensing means of indoor DC fan in the air conditioner according to any one of claim 1-4.
6. an air conditioner, is characterized in that, comprises the indoor set of air conditioner according to claim 5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520431189.XU CN204789717U (en) | 2015-06-18 | 2015-06-18 | Air conditioner and current detection device of indoor set and indoor direct current fan thereof |
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| CN201520431189.XU CN204789717U (en) | 2015-06-18 | 2015-06-18 | Air conditioner and current detection device of indoor set and indoor direct current fan thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110987501A (en) * | 2019-12-18 | 2020-04-10 | 广东合立鼎峰科技有限公司 | Full-automatic online intelligent detection method for air conditioner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110987501A (en) * | 2019-12-18 | 2020-04-10 | 广东合立鼎峰科技有限公司 | Full-automatic online intelligent detection method for air conditioner |
| CN110987501B (en) * | 2019-12-18 | 2021-09-10 | 广东合立鼎峰科技有限公司 | Full-automatic online intelligent detection method for air conditioner |
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