CN101227079A - Protector special for digital type compressor - Google Patents
Protector special for digital type compressor Download PDFInfo
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- CN101227079A CN101227079A CNA2007103025265A CN200710302526A CN101227079A CN 101227079 A CN101227079 A CN 101227079A CN A2007103025265 A CNA2007103025265 A CN A2007103025265A CN 200710302526 A CN200710302526 A CN 200710302526A CN 101227079 A CN101227079 A CN 101227079A
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Abstract
The invention provides a specific protector of a digital compressor, which comprises a current detection module, an input module, a single-chip microcomputer control module, a display module and an output protection module, wherein the current detection module comprises a current mutual-inductor which is connected with a three-phase input power of the compressor when using in order to measure current circuit and export the detected induction current value to the single-chip microcomputer control module, the single-chip microcomputer control module receives and calculates the data, the working current value of the compressor is displayed by the display module timely, the output protection module is driven if detecting the defect such as working current overload, phase loss or three-phase imbalance and the like, the switch of the output protection module breaks the connection of the compressor and the three-phase power, thereby the breakdown incidence is reduced to the minimum degree and effectively protects the compressor.
Description
Technical field
The present invention relates to a kind of compressor protector, particularly a kind of protector that is used on the refrigerant compressor.
Background technology
In recent years; the application of domestic Air Conditioner is more and more universal; the particularly continuous construction of the large-scale building of urban architecture; degree of dependence for air-conditioning equipment is more and more higher; to the also corresponding raising of the specification requirement of air conditioner; the technology of indoor fan and piping facility is ripe day by day, drives the compressor operation of whole air conditioner operation and the center that protection has then become the air conditioner technology thereof.In a single day compressor breaks down, and then whole air-conditioner system will all be paralysed.Compressor is as the operation center of air-conditioning system, its current loading, and phase shortage, three-phase equilibrium, various factorss such as mechanical load all may cause the appearance of fault, thereby cause compressor damage to shut down.How preventing the compressor operating fault, or carry out early warning before compressor fault takes place, safeguard in advance, guarantee that compressor normally moves, is the important topic of air conditioner with supporting electronic device exploitation.
The mode that traditional protector adopts is a calibration gauge; show the too high or too low of electric current with pointer; with regulating manually; can only in certain scope, carry out Current Control in the mode of stirring scale; but can not shield, in case the current overload of compressor, phase shortage, three-phase imbalance then whole compressor will be burnt.
Summary of the invention
Thereby the object of the invention provides and a kind ofly can write down and show the protector of effectively protecting compressor the operation conditions of compressor and failure cause.
For achieving the above object, technical scheme of the present invention is: a kind of protector special for digital type compressor, and it comprises:
Current detection module comprises current transformer, is connected in series the survey current circuit that is used to gather the mutual inductance current value mutually with described current transformer;
Input module is used to import the current protection value and the Control Parameter of setting;
Single chip control module, described single chip control module has a plurality of inputs and a plurality of output, the survey current circuit of one of them input and described current detection module is electrically connected, an input and described input module are electrically connected, and described single chip control module receives and handles the output signal of survey current circuit and judges according to the current value that input module is set;
Display module is electrically connected with an output of single chip control module, is used for showing in real time that surveying current circuit is input to single chip control module current value after treatment;
The output protection module; the switch that comprises one tunnel transistor that is connected with output of described single chip control module, is connected in series mutually with transistor, thus described single chip control module is controlled described switch open or closure according to conducting and disconnection that the result who judges exports a control signal driving transistors.
During use; current transformer is connected with the three-phase input power supply of compressor; survey current circuit detected induced electricity flow valuve is exported to single chip control module; single chip control module receives data and calculates; the compressor operating current value is shown by display module in real time; and if when detecting fault such as operating current overload, phase shortage or three-phase imbalance, in time drive the output protection module, make the switch of output protection module disconnect being connected of compressor and three phase mains.
The present invention compared with prior art; have following advantage: the present invention adopts current transformer that the three-phase electricity flow valuve sensing single chip control module in the course of work is handled; mode by liquid crystal display shows the electric current of refrigerant compressor in running and record in real time; and when detecting current overload; phase shortage; during problems such as three-phase imbalance; timely cut-out compressor is connected with three phase mains; and send alarm; thereby remind the user that compressor is carried out examination and maintenance; the normal back recovery of answer compressor is connected with three phase mains; rate of breakdown can be minimized, protect compressor effectively.
Description of drawings
Accompanying drawing 1 is compressor electronic protector electricity theory diagram of the present invention;
Accompanying drawing 2 is compressor electronic protector main circuit schematic diagram of the present invention;
Accompanying drawing 3 is power circuit electrical schematic diagram of the present invention
Wherein: 1, power circuit; 2, current detection module; 21, current transformer; 22, survey current circuit; 3, input module; 4, single chip control module; 5, output protection module; 51, warning circuit; 6, display module;
Embodiment
Below in conjunction with accompanying drawing embodiments of the present invention are described in detail:
The electric theory diagram of compressor electronic protector as shown in Figure 1; the present invention adopts the electronic sensor technology; mode with liquid crystal display; the electric current of compressor in running shown and record in real time; when detecting problems such as current overload, phase shortage, three-phase imbalance; timely cut-out compressor is connected with three phase mains; and send alarm; thereby remind the user that compressor is carried out examination and maintenance; the normal back recovery of answer compressor is connected with three phase mains; this protector is easy to operate, rate of breakdown can be minimized.It mainly comprises single chip control module 4; power circuit 1 for single chip control module 4 power supplies; be used to detect the current detection module 2 of compressor three phase mains electric current; the output protection module 5 that is controlled by described single chip control module 4; be used for showing in real time the display module 6 of compressor three phase mains current value; be used to import the input module 3 of setting current value and control demonstration output; wherein; detect current detection module 2 and comprise current transformer 21; with the survey current circuit 22 that described current transformer 21 is connected in series mutually, below above-mentioned each functional module combined circuit is specifically introduced:
Fig. 2 is a main circuit schematic diagram of the present invention; comprise single chip control module 4, current detection module 2, output protection module 5, display module 6; single chip control module 4 is mainly single-chip microcomputer, and single-chip microcomputer has a plurality of inputs and a plurality of output and other modules and carries out the mutual of information.Comprise current transformer 21 in the current detection module 2, this current transformer 21 is three coils, three phase lines of the three phase mains that will be connected with compressor when using are passed respective coil respectively, survey current circuit 22 mainly is in series by three divider resistances and respective coil and forms, so three phase mains produces induced current by coil, this induced current is bigger usually, converting less magnitude of voltage to by each divider resistance is input in the single-chip microcomputer, be provided with A/D converter in the single-chip microcomputer, the magnitude of voltage that current value obtains through divider resistance converts digital value to by A/D converter, and each phase current values that single-chip microcomputer calculated and generated compressor to this value outputs to display module 6 and shows in real time.
Described display module 6 is made up of liquid crystal, resistance, and the delivery outlet of single-chip microcomputer is connected with the port of liquid crystal, and the current value that calculates is exported by liquid crystal display.
Single-chip microcomputer in testing process if find overcurrent; during fault such as phase shortage or imbalance; to start output protection module 5; by control output protection module 5 compressor and three phase mains are disconnected; these output protection module 5 physical circuits comprise the transistor Q1 that is electrically connected with single-chip microcomputer one output; the switch JDQ1 that is in series with transistor Q1; this switch can adopt relay; the three-phase current that single-chip microcomputer is exported current detector calculates in real time and judges; the three-phase current that detects current transformer output when single-chip microcomputer surpasses to be set electric current or detects phase shortage or during three-phase current unbalance; it will drive triode work; control relay disconnection and compressor are connected with three phase mains; thereby the protection compressor is not damaged; when electric current recovers normal, relay will be compound automatically.
Simultaneously, in order to reach timely alarm, reduce the damage of compressor, this output protection module 5 also comprises the buzzer B1 that is connected with the single-chip microcomputer output, and when above-mentioned fault occurring, Micro Controller Unit (MCU) driving buzzer ring sound is reported to the police.
Fig. 3 is power circuit module principle figure, this power circuit 1 is used to single chip control module 4 that direct-current working volts are provided, this circuit is in series successively by decompression capacitor C1, rectifier D5, filter capacitor E1, pressurizer U4, electric main (220V alternating current) carries out step-down through decompression capacitor C1, by becoming low-voltage DC behind the rectifying and wave-filtering behind rectifier D5 and the filter capacitor E1, single-chip microcomputer is exported in the further voltage stabilizing of this direct current process pressurizer U4, wherein decompression capacitor adopts 0.68uF/400V, and pressurizer employing model is 7805 voltage stabilizing chip.
Fig. 4 is an input module 3; this input module is made up of button and pull-up resistor, and each button is connected with the input port of single-chip microcomputer, when input module 3 can be set the current protection value; and can be by different demonstration output, as selectable demonstration A phase, B phase or C phase current values by the key control display module.
The foregoing description only for explanation technical conceive of the present invention and characteristics, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (7)
1. protector special for digital type compressor, it is characterized in that: it comprises
Current detection module (2) comprises current transformer (21), is connected in series the survey current circuit (22) that is used to gather the induced electricity flow valuve mutually with described current transformer (21);
Input module (3) is used to import the current protection value and the Control Parameter of setting;
Single chip control module (4), described single chip control module (4) has a plurality of inputs and a plurality of output, the survey current circuit (22) of one of them input and described current detection module (2) is electrically connected, an input and described input module (3) are electrically connected, and described single chip control module (4) receives and handles the output signal of survey current circuit (22) and judges according to the current value that input module (3) is set;
Display module (6) is electrically connected with an output of single chip control module (4), is used for showing in real time that surveying current circuit (22) is input to single chip control module (4) current value after treatment;
Output protection module (5); comprise one tunnel switch (JDQ1) that is connected in series mutually with described (4) transistors that output is connected of single chip control module (Q1), with transistor, described single chip control module (4) export a control signal driving transistors (Q1) according to the result who judges thus conducting and disconnection control described switch (JDQ1) closure or openness.
2. protector special for digital type compressor according to claim 1; it is characterized in that: it also comprises power circuit (1), and described power circuit (1) is used for alternating current is carried out exporting to described single chip control module (4) with direct current after rectification, filtering, the voltage stabilizing.
3. protector special for digital type compressor according to claim 1 is characterized in that: described current transformer (21) is three mutual inductors.
4. according to claim 1 or 3 described protector special for digital type compressor; it is characterized in that: described single chip control module (4) is built-in with A/D converter, and described A/D converter is used for becoming digital signal with surveying current circuit (22) input analog signal conversion wherein.
5. protector special for digital type compressor according to claim 1; it is characterized in that: described output protection module (5) also comprises warning circuit (51); described warning circuit (51) comprise with described (4) transistors that output is connected of single chip control module (Q2), with the switch (JDQ2) that transistor is connected in series mutually, described switch (JDQ2) is connected with a sound and light signal source.
6. protector special for digital type compressor according to claim 1 or 5, it is characterized in that: described output protection module (5) also comprises and described (4) buzzers that output is connected of single chip control module (B1).
7. protector special for digital type compressor according to claim 5 is characterized in that: described switch (JDQ1, JDQ2) is a relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103025265A CN101227079A (en) | 2007-12-26 | 2007-12-26 | Protector special for digital type compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103025265A CN101227079A (en) | 2007-12-26 | 2007-12-26 | Protector special for digital type compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101227079A true CN101227079A (en) | 2008-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007103025265A Pending CN101227079A (en) | 2007-12-26 | 2007-12-26 | Protector special for digital type compressor |
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| CN (1) | CN101227079A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661643A (en) * | 2012-05-22 | 2012-09-12 | 广东智科电子有限公司 | Heat pump system protector |
| CN102004224B (en) * | 2009-08-31 | 2012-12-12 | 比亚迪股份有限公司 | Three-phase motor phase failure detection system and detection method thereof |
| CN105781953A (en) * | 2014-12-25 | 2016-07-20 | Tcl空调器(中山)有限公司 | Control method and controller for preventing compressor from being overloaded, and air conditioner |
| CN105953372A (en) * | 2016-05-20 | 2016-09-21 | 广东美的暖通设备有限公司 | Phase lacking control method and device for compressor and air conditioner |
| CN110639640A (en) * | 2019-09-26 | 2020-01-03 | 四川省井研县裕丰机械制造有限公司 | Intelligent rice hulling device and control system |
-
2007
- 2007-12-26 CN CNA2007103025265A patent/CN101227079A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102004224B (en) * | 2009-08-31 | 2012-12-12 | 比亚迪股份有限公司 | Three-phase motor phase failure detection system and detection method thereof |
| CN102661643A (en) * | 2012-05-22 | 2012-09-12 | 广东智科电子有限公司 | Heat pump system protector |
| CN105781953A (en) * | 2014-12-25 | 2016-07-20 | Tcl空调器(中山)有限公司 | Control method and controller for preventing compressor from being overloaded, and air conditioner |
| CN105953372A (en) * | 2016-05-20 | 2016-09-21 | 广东美的暖通设备有限公司 | Phase lacking control method and device for compressor and air conditioner |
| CN105953372B (en) * | 2016-05-20 | 2019-05-17 | 广东美的暖通设备有限公司 | Phase shortage control method, phase shortage control device and the air conditioner of compressor |
| CN110639640A (en) * | 2019-09-26 | 2020-01-03 | 四川省井研县裕丰机械制造有限公司 | Intelligent rice hulling device and control system |
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Open date: 20080723 |