CN103511292A - Dewatering pump - Google Patents
Dewatering pump Download PDFInfo
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- CN103511292A CN103511292A CN201310153042.4A CN201310153042A CN103511292A CN 103511292 A CN103511292 A CN 103511292A CN 201310153042 A CN201310153042 A CN 201310153042A CN 103511292 A CN103511292 A CN 103511292A
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Abstract
The invention provides a dewatering pump and a control method of the dewatering pump. When foreign matters are sucked into the dewatering pump, the foreign matters can be easily and reliably discharged by stopping or reversing a motor. The dewatering pump is at least provided with a three-phase DC motor where a rotor thereof is composed of a 2i-pole magnet and a stator is composed of a three-phase coil; a motor driver for driving and controlling the DC motor; and a detecting mechanism for detecting the drive state of the three-phase DC motor, and stopping or reversing the motor for a certain period when detecting a constraint state of the motor caused by clamping of foreign maters.
Description
Technical field
The present invention relates to draining pump, relate in particular to the draining pump of the drain water that is suitable for discharging air conditioner outside machine and can implement the draining pump of the controlling method of this draining pump.
Background technique
All the time, in air conditioner, use the draining pump (being also called below drainage pump) of patent documentation 1 and the patent documentation 2 disclosed AC draining pumps of difference and DC draining pump and so on, the drain water of the dewfall such as heat-exchanger surface at air conditioner is discharged to outside machine.
Fig. 1 (a) represents the partial sectional view of typical existing AC drainage pump.AC drainage pump 1 comprises pump portion 2 and drives the motor part (not shown) of the impeller 10 of this pump portion 2.Motor part possesses AC motor or DC motor.Pump portion 2 possesses: the impeller 10 running shaft 14(rotor via axle 12 with motor part) linking; Set the pump case 3 of impeller 10 within it the concentric shape of portion; And the lid 7 that covers the top of pump case 3.In pump portion 2, be provided with the suction port 4 of the drain water 20 that attracts to be stored in the drain pan (not shown) that is disposed at pump portion 2 belows and along the substantially horizontal of pump portion 2, drain water 20 be discharged to the exhaust port 5 outside machine.Thereby drain water 20, as shown in the arrow A in Fig. 1 (a), clips impeller 10 and flows to top from the below of pump portion 2.
Prior art document
Patent documentation 1: TOHKEMY 2002-5083 communique
Patent documentation 2: TOHKEMY 2012-26398 communique
Yet, in the pump portion 2 of AC drainage pump 1, for example, as shown in Fig. 1 (b), between impeller 10 and pump case 3, form gap stream 6.On the impeller 10 and pump case 3 stream face 3a, 10a separately of this gap stream 6 of formation, there is the jog arranging because of the necessity in design or design the not projection of the pettiness of plan.Due to the existence of this projection 3b, 10b, if sneak into the foreign matters such as rubbish 30 in the drain water 20 attracting at drainage pump 1,, as shown in Fig. 1 (b), foreign matter 30 is likely clipped between projection 3b and 10b.Like this, if sandwich foreign matter 30 being formed at respectively between projection 3b on stream face 3a and 10a and 10b, in drainage pump 1, likely cannot discharge foreign matter 30.That is, all the time, owing to not being configured to and can identifying sandwiching of foreign matter 30 in drainage pump 1, so drainage pump 1 rotates to the rotating force (torque) of the output limit of motor, continues to maintain the state that keeps foreign matter 30.Its result, the motor that forms drainage pump 1 becomes restrained condition, causes becoming the state that can not discharge drain water 20, even likely produces air conditioner and does not work, or produce the unfavorable condition of leaking etc. from indoor set.
Summary of the invention
The object of the invention is to, in view of this problem points, the controlling method of a kind of draining pump and this draining pump is provided, when it is configured in foreign matter is inhaled into draining pump, according to the drive condition of motor, detect this situation, then by motor being stopped or reversing and can be easily and discharge reliably foreign matter.
To achieve these goals, draining pump of the present invention is characterised in that at least possess: rotor is by 2i utmost point magnet forms and stator consists of three-phase coil three-phase DC motor; Drive the motor driver of controlling this DC motor; And the ， feeler mechanism of feeler mechanism of detecting the drive condition of three-phase DC motor is while detecting the restrained condition of the motor being caused by sandwiching of foreign matter, motor is stopped or the certain hour that reverses.
The feeler mechanism of the drive condition of the detection motor of draining pump of the present invention is preferably configured to, in normal operation, when not detecting not the Out let of coil of energising and the induced voltage between shared mid point terminal, be judged as the restrained condition that detects motor.
The feeler mechanism of the drive condition of the detection motor of draining pump of the present invention can also possess Hall IC, and above-mentioned feeler mechanism, in normal operation, when above-mentioned Hall IC does not detect the magnetic force of above-mentioned rotor of rotation, is judged as the restrained condition that detects motor.
The feeler mechanism of the drive condition of the detection motor of draining pump of the present invention, both can be for having applied mark on the above-mentioned rotor at three-phase DC motor, and possesses optical coupler, this detection device is in normal operation, when optical coupler does not detect the mark of motor of rotation, be judged as the restrained condition that detects motor, or, also can possess thermosensitive element for feeler mechanism, this feeler mechanism is in normal operation, at above-mentioned thermosensitive element, detect coil or the said motor driver adstante febre of above-mentioned three-phase DC motor, be judged as the restrained condition that detects motor.
The feeler mechanism of the drive condition of the detection motor of draining pump of the present invention is also preferably configured to, and exports motor lock protective signal, and above-mentioned DC motor is stopped or the certain hour that reverses when the number of times that detects the restrained condition of said motor surpasses stipulated number.
In addition, to achieve these goals, the controlling method of draining pump of the present invention is characterised in that, above-mentioned draining pump at least possesses: rotor is by 2i utmost point magnet forms and stator consists of three-phase coil three-phase DC motor; Drive the motor driver of controlling this DC motor; And the feeler mechanism of detecting the drive condition of above-mentioned DC motor, while detecting the restrained condition of the motor being caused by sandwiching of foreign matter in above-mentioned feeler mechanism, motor is stopped or the certain hour that reverses.
The present invention has following beneficial effect.
Draining pump of the present invention is by possessing above-mentioned structure, not only simple in structure, and in foreign matter is drawn into draining pump time, according to the drive condition of motor, detect the abnormal of draining pump, by motor is stopped or the certain hour that reverses during, can be easily and discharge reliably the special action effect of foreign matter thereby play.When detecting induced voltage, owing to not needing especially Detecting element, so can suppress manufacture cost.In addition, when possessing other Detecting element, by possessing the Detecting elements such as Hall IC, optical coupler or thermosensitive element, thereby compare with the mechanical feeler mechanism of contact-type etc., structure member less, cheap and be difficult to produce fault.In addition, in this case, also can be more easily and detect more reliably the drive condition of motor.Accompanying drawing explanation
Fig. 1 is the figure sandwiching of the foreign matter when illustrating that existing drainage pump draws water, and is (a) partial sectional view of the drainage pump while drawing water, and (b) means the major component sectional view of the state that foreign matter sandwiches.
Fig. 2 is for the figure in the discharge of the foreign matter of drainage pump of the present invention is described, (a) be the partial sectional view of the drainage pump when stopping or reversing, (b) mean when drainage pump stops because of draining by gravity, caused flow and to relax from sandwiching the state of foreign matter, and discharge the major component amplification view of the state of this foreign matter, (c) mean the major component amplification view of the state by drainage pump being reversed a little discharge foreign matter.
Fig. 3 means the circuit diagram of the method for the constraint that utilizes induced voltage to detect motor.
Fig. 4 means the circuit diagram of the method for the constraint that utilizes Hall IC to detect motor.
Fig. 5 means the constraint that detects motor, and motor is stopped or the flow chart of the controlling method of the drainage pump that reverses.
In figure:
1-draining pump (drainage pump); 2-pump portion; 3-pump case; 10-impeller; 30-foreign matter; 40,50-three-phase motor; COM-shares mid point terminal; HU, HV, HW-Hall IC; M-magnet (rotor); MD-motor driver; U, V, W-three-phase coil (stator).
Embodiment
Below, with Fig. 1 to Fig. 5, about can easily discharge the controlling method of the drainage pump of the present invention of this foreign matter in sandwiching the drainage pump of foreign matter, at length describe.
In the present invention, drainage pump 1 as shown in Figure 1, similarly possesses motor part (not shown) and pump portion 2 with existing drainage pump, the drain water that is stored in the drain pan of air conditioner is drunk up, and discharge outside machine.Pump portion 2 possesses pump case 3, suction port 4, exhaust port 5, has the impeller 10 of blade 11 and axial region 12 and cover 7.In pump portion 2, between impeller 10 and pump case 3, be also formed with gap stream 6.
In Fig. 2 (a)～(c), express foreign matter of the present invention and discharge principle.Fig. 2 (a) is the summary partial sectional view of the drainage pump of drainage pump while stopping.State when Fig. 2 (b) expression drainage pump 1 stops, state when Fig. 2 (c) expression drainage pump 1 reverses a little.As shown in Fig. 2 (b), if drainage pump 1 stops, foreign matter 30 is because of the mobile B being caused by gravity of the drain water 20 of (direction shown in arrow A in Fig. 1 (a)) opposite direction when drawing water, and drain water 20 flows to suction port 4 from exhaust port 5.Thus, sandwiching of foreign matter 30 relaxed, and its result foreign matter 30 is followed the adverse current B of drain water 20, from departing between projection 3b and 10b, swims or discharge in drain pan in Hou， gap stream 6.And, as shown in Figure 2 (c), by drainage pump 1 is reversed a little, make to sandwich the projection 3b of foreign matter 30 and being spaced apart of 10b, thereby foreign matter 30 swims in gap stream 6 more reliably or discharges in drain pan.
The foreign matter 30 that swims in gap stream 6 or return in drain pan can be discharged to outside machine again drawing water the clampings such as Shi，Bu Bei gap stream 6.And when foreign matter 30 can not be discharged to outside machine once, by repeatedly carrying out this action several times, thereby foreign matter 30 can be discharged with quite high probability.In addition, by drainage pump 1 is turned round reversing, also can carry out drawing water of drain water 20, so when drainage pump 1 is reversed a little, make continuously it turn round reversing by keeping intact, also can make foreign matter 30 be discharged to outside machine.
Like this, because the foreign matter 30 being clamped in drainage pump 1 is discharged from, so be appreciated that to possess the feeler mechanism sandwiching of detecting foreign matter 30, according to the signal from this feeler mechanism, make drainage pump 1 stop or reversing, thereby can easily get rid of foreign matter 30.When sandwiching foreign matter 30, as mentioned above, drainage pump 1 rotates to the rotating force (torque) of the output limit of motor, continues to maintain the state that keeps foreign matter 30.Particularly, drainage pump 1 becomes the state that its motor is non-rotary, apply over load on motor, and motor becomes restrained condition.Thereby known, in order to get rid of the foreign matter 30 being clamped in drainage pump 1, by detecting the restrained condition of this motor, thereby make drainage pump 1 stop or reversing.
In the present invention, the means as detecting the restrained condition of motor, have found the method shown in Fig. 3 and Fig. 4.
Fig. 3 is illustrated in the drainage pump of the three-phase DC motor driving that utilizes non-sensor type, detects a mode of execution of the restrained condition of motor of the present invention.As shown in Figure 3, in the three-phase DC of present embodiment motor, the rotor of rotation consists of bipolar magnet M, and stator consists of three-phase coil U, V, W.In the present embodiment, although represented the structure of simple bipolar magnet, three-phase coil type, the invention is not restricted to this.The 2i utmost point magnet (or also referred to as " multi-pole magnet ") of bipolar magnet that magnet M also can be multipair by being provided with (i to) forms, and three-phase coil also can arrange a plurality of coils (groove) (such as groove=6, three-phase * 2 groove, groove=9, three-phase * 3 groove etc.) on mutually every.The three-phase DC motor of present embodiment is via the motor driver MD as this motor drive circuit, mode with U phase → V phase, V phase → W phase, W phase → U phase, in the time of to two coil electricities, by magnet M(rotor) direction switch to predetermined direction, thereby obtain rotating force.Now, make the magnetic pole (S or N) of magnet M for example, by the remaining coil (the not coil of the W phase of energising when U phase → V switches on mutually) of not switching on front, thereby at coil Out let (W separately
out, U
outor V
out) and shared mid point terminal (COM) between produce induced voltage (magnetizing force).That is, by detecting the generation of this induced voltage, thereby detect magnet M(rotor) normally rotation.In other words, motor becomes the rotation that restrained condition refers to rotor and stops restrained.Thereby, if motor becomes restrained condition, magnet M(rotor) magnetic pole cannot not produce thus induced voltage by before the remaining coil of not switching on, cannot detect this induced voltage.By possessing to detect, cannot detect the state of induced voltage and be identified as the feeler mechanism that has produced motor lock state like this, thereby can detect the restrained condition of motor, in other words, can detect the drive condition of motor for abnormal.As the method that detects more reliably the restrained condition of this motor, preferably in predetermined time, when detecting a certain number of times of induced voltage, be not judged as motor in restrained condition.
Fig. 4 is for example illustrated in, in the drainage pump of the three-phase DC motor driving that utilizes the type that possesses sensor (Hall IC), detects another mode of execution of the restrained condition of motor of the present invention.As shown in Figure 4, the three-phase DC motor of present embodiment and the three-phase DC motor shown in Fig. 3 are same, and the rotor of rotation consists of bipolar magnet M1, and stator consists of three-phase coil U, V, W.The three-phase DC motor of present embodiment also possesses the structure that is rotated control via the motor driver MD1 as motor drive circuit.In the three-phase DC motor shown in Fig. 4, detect magnet M1(rotor being provided with) Hall IC (HU, HV or the HW) this point of magnetic force on different, thereby, can not be connected with COM yet.In the present embodiment, although use to detect by magnet M1(rotor) the element of variation of the electromotive force that causes of the separation contact of magnetic pole be Hall IC (HU, HV or HW), but also can be used as Detecting element and use optical coupler, to magnet M1(rotor) mark used of examinations, thus detect the rotation of rotor.
As the mode of execution of method that detects the restrained condition of motor of the present invention, although represented the method shown in Fig. 3 and Fig. 4, this detecting method is not limited to this.For example, if there is the restrained condition of motor, the rotation of the rotor of motor is restrained, under this state, if the coil of motor is continued to energising, and the large electric current that flows on coil and motor driver, motor heating.Also can be by detect this heating with thermosensitive element etc., thus the restrained condition of motor detected.
With the flowchart text shown in Fig. 5, detect due to the restrained condition that sandwiches the motor of the drainage pump that foreign matter causes, and for removing the mode of execution of controlling method of the drainage pump of the present invention of this state.In addition, although the control circuit of drainage pump of the present invention is encased in running, controls in the motor driver as motor drive circuit of drainage pump, may not be confined to this.
If input CRANK PULSES, starting system (drainage pump), in step S501, to motor driver MD or MD1 energising.Follow the energising to motor driver MD or MD1, in step S502, the three- phase DC motor 40 or 50 of the motor part of drainage pump is driven, enters stable operating condition.By this three- phase DC motor 40 or 50 steady runnings, as shown in step S503, the signal that can detect induced signal or be produced by Hall IC.
Drive the three- phase DC motor 40 or 50 of drainage pump in step S504, via motor driver MD or the MD1 as motor drive circuit, as mentioned above, the energising of coil is switched to U phase → V phase, V phase → W phase, W phase → U phase.According to this energising, switch the input of implementing continuously induced signal or being produced by Hall IC.As long as foreign matter etc. is not plugged in drainage pump, the signal that can detect continuously induced signal or be produced by Hall IC, carries out and runs well.And, for example, if the power supply of drainage pump mounted unit (air conditioner) stops, with its interlock, to the energising of motor 40 or 50, being cut off, drainage pump stops.
, if sandwich foreign matter 30 in drainage pump, as mentioned above, and because the rotation of the motor 40 of driven pump or 50 rotor (magnet M or M1) is restrained, thus the signal that cannot export induced signal or be produced by Hall IC.In step S507, if the failure of the input of predetermined stipulated number, motor driver MD or MD1 are judged as motor and have entered restrained condition.Thus, motor driver MD or MD1 are in step S508, and in order to remove the restrained condition of motor, output is for the protection of the motor lock protective signal of motor.If output motor lock protective signal, motor driver MD or MD1 make motor stop certain hour or reversion.Now, whether detect motor still in restrained condition, if not abnormal, foreign matter 30 is removed, if the restrained condition of motor is disengaged, motor returns to normal operation.If again detect extremely, the confining guard signal of motor is exported again, and as mentioned above, motor stops or reversing.Like this, in order to remove more reliably foreign matter 30, preferably repeatedly make motor stop or reversing the scheduled time.
Claims (11)
1. a draining pump, is characterized in that,
At least possess: rotor is by 2i utmost point magnet forms and stator consists of three-phase coil three-phase DC motor; Drive the motor driver of controlling this DC motor; And the feeler mechanism of detecting the drive condition of above-mentioned DC motor,
When above-mentioned feeler mechanism detects the restrained condition of the above-mentioned DC motor being caused by sandwiching of foreign matter, above-mentioned DC motor is stopped or the certain hour that reverses.
2. draining pump according to claim 1, is characterized in that,
Detect the feeler mechanism of drive condition of said motor in normal operation, when not detecting the Out let of the coil of energising not and the induced voltage between shared mid point terminal, be judged as the restrained condition that detects motor.
3. draining pump according to claim 1, is characterized in that,
Above-mentioned feeler mechanism possesses Hall IC, detects the feeler mechanism of drive condition of said motor in normal operation, when above-mentioned Hall IC does not detect the magnetic force of above-mentioned rotor of rotation, is judged as the restrained condition that detects motor.
4. draining pump according to claim 1, is characterized in that,
On the above-mentioned rotor of above-mentioned three-phase DC motor, applied mark, and above-mentioned feeler mechanism possesses optical coupler, this feeler mechanism, in normal operation, when above-mentioned optical coupler does not detect the above-mentioned mark of above-mentioned rotor of rotation, is judged as the restrained condition that detects motor.
5. draining pump according to claim 1, is characterized in that,
Above-mentioned feeler mechanism possesses thermosensitive element ，Gai feeler mechanism in normal operation, detects coil or the said motor driver adstante febre of above-mentioned three-phase DC motor at above-mentioned thermosensitive element, is judged as the restrained condition that detects motor.
6. according to the draining pump described in any one in claim 1～5, it is characterized in that,
Above-mentioned feeler mechanism exports motor lock protective signal when the number of times that detects the restrained condition of said motor surpasses stipulated number, and above-mentioned DC motor is stopped or the certain hour that reverses.
7. a controlling method for draining pump, is characterized in that,
Above-mentioned draining pump at least possesses: rotor is by 2i utmost point magnet forms and stator consists of three-phase coil three-phase DC motor; Drive the motor driver of controlling this DC motor; And the feeler mechanism of detecting the drive condition of above-mentioned DC motor,
When above-mentioned feeler mechanism detects the restrained condition of the motor being caused by sandwiching of foreign matter, motor is stopped or the certain hour that reverses.
8. the controlling method of draining pump according to claim 7, is characterized in that,
Above-mentioned feeler mechanism, in normal operation, when not detecting not the Out let of coil of energising and the induced voltage between shared mid point terminal, is judged as the restrained condition that detects motor.
9. the controlling method of draining pump according to claim 7, is characterized in that,
Above-mentioned feeler mechanism possesses Hall IC ，Gai feeler mechanism in normal operation, when above-mentioned Hall IC does not detect the magnetic force of above-mentioned rotor of rotation, is judged as the restrained condition that detects motor.
10. the controlling method of draining pump according to claim 7, is characterized in that,
On the above-mentioned rotor of above-mentioned three-phase DC motor, applied mark, and above-mentioned feeler mechanism possesses optical coupler, this detection device, in normal operation, when above-mentioned optical coupler does not detect the above-mentioned mark of above-mentioned rotor of rotation, is judged as the restrained condition that detects motor.
11. according to the controlling method of the draining pump described in any one in claim 7～10, it is characterized in that,
Above-mentioned feeler mechanism exports motor lock protective signal when the number of times that detects the restrained condition of said motor surpasses stipulated number, and above-mentioned DC motor is stopped or the certain hour that reverses.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-134950 | 2012-06-14 | ||
| JP2012134950A JP2013256926A (en) | 2012-06-14 | 2012-06-14 | Drainage pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103511292A true CN103511292A (en) | 2014-01-15 |
Family
ID=49894561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310153042.4A Pending CN103511292A (en) | 2012-06-14 | 2013-04-27 | Dewatering pump |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2013256926A (en) |
| CN (1) | CN103511292A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141603A (en) * | 2014-06-24 | 2014-11-12 | 赛莱默(中国)有限公司 | Water pump control system with energy saving function |
| CN105971867B (en) * | 2016-05-04 | 2018-04-13 | 珠海格力电器股份有限公司 | The detection method and device of compressor fault |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020007909A (en) * | 2016-11-01 | 2020-01-16 | 日本電産テクノモータ株式会社 | Pump device and control method of pump device |
| KR102603619B1 (en) * | 2018-07-06 | 2023-11-16 | 엘지전자 주식회사 | Drain pump driving apparatus and laundry treatment machine including the same |
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| CN104141603A (en) * | 2014-06-24 | 2014-11-12 | 赛莱默(中国)有限公司 | Water pump control system with energy saving function |
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| CN105971867B (en) * | 2016-05-04 | 2018-04-13 | 珠海格力电器股份有限公司 | The detection method and device of compressor fault |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013256926A (en) | 2013-12-26 |
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Application publication date: 20140115 |