CN108227599A - Dredge pump water pump intelligent control system - Google Patents
Dredge pump water pump intelligent control system Download PDFInfo
- Publication number
- CN108227599A CN108227599A CN201611152078.0A CN201611152078A CN108227599A CN 108227599 A CN108227599 A CN 108227599A CN 201611152078 A CN201611152078 A CN 201611152078A CN 108227599 A CN108227599 A CN 108227599A
- Authority
- CN
- China
- Prior art keywords
- pump
- terminal
- control system
- connects
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 110
- 238000007667 floating Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/048—Monitoring; Safety
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a kind of dredge pump water pump intelligent control systems.The control system includes (1) power supply lines：Module provides burning voltage in order to control, including firewire, zero curve and ground wire；(2) control module, the control module include the first overload circuit, the second overload circuit, the first pump output loop, the second pump output loop, play pump control loop and warning line control loop；First overload circuit connects the first electrothermal relay, and the second overload circuit connects the second electrothermal relay；First pump output loop connects the coil of the first A.C. contactor, and the second pump output loop connects the coil of the second A.C. contactor；It plays pump control loop and picks up pump water level sensor, play pump water level sensor and connect with opening pump water level float；Warning line control loop connects high water level inductor, and high water level inductor is connect with high water level floating ball.The control system further includes wire connection terminal.Dredge pump water pump intelligent control system circuit of the invention is simple, component is few, easy to operate.
Description
Technical field
The present invention relates to field of intelligent control, relate more specifically to a kind of dredge pump water pump intelligent control system.
Background technology
At present, the switch board of two dredge pumps of existing control is all to obtain the electric coil for driving contactor by intermediate relay
Carry out start and stop dredge pump, as shown in Figure 1 and Figure 2.In Fig. 2, switch SA is beaten at automatic position, passes through 2 exchange 36V intermediate relays
KA1,2 pump position and warning line and open a pump and two pumps rising respectively, and when warning line, KA2 obtains electric, and 2 water pumps are same
When work.When only there are one water level when two pumps be the using and the reserved, when 1# pump break down in use when, intermediate relay
Device KA3 obtains electric electric so as to which KA5 be driven to obtain so that the coil of A.C. contactor KM2 obtains electric, is switched to 2# pump works.Identical, such as
Fruit 2# pumps break down at work, and intermediate relay KA4 obtains electric electric so as to which KA5 be driven to obtain so that the line of A.C. contactor KM1
It encloses electric, is switched to 1# pump works.The circuit of this two failure of pump rotation is as shown in Figure 1, used KA3~5,3 relays.
Wherein KA1~5 are intermediate relay, and HL1 is power supply indicator, and HL2,3 be 1# pumps and the instruction of 2# failure of pump, and HL4,5 pump for 1#
It is indicated with 2# pump operations, QF10, QF11 are air switch；KM1, KM2 are A.C. contactor；KH1, KH2 are electrothermal relay, FU1
For fuse, SA is change-over switch, and SB1~4 are start-stop button.The connections of this 2 dredge pumps of control are complicated at present, member
Number of devices is more, and high labor cost, circuit is susceptible to failure.
Therefore, this field is badly in need of developing new dredge pump water pump intelligent control system, simplifies circuit, reduces component, carries
The safety of high system operation and stability.
Invention content
The object of the present invention is to provide the dredge pump water pump intelligent control systems that a kind of circuit is simple, component is few.
In the present invention, the present invention provides a kind of dredge pump water pump intelligent control system, the intelligence control system packets
Include (1) power supply lines：Module provides burning voltage in order to control, including firewire, zero curve and ground wire；(2) control module,
The control module includes the first overload circuit, the second overload circuit, the first pump output loop, the second pump output loop, plays pump
Control loop and warning line control loop.
Wherein, the first overload circuit connects the first electrothermal relay, and the second overload circuit connects the second electrothermal relay；
The first pump output loop connects the coil of the first A.C. contactor, and the second pump output loop connects the second exchange
The coil of contactor；
Described pump control loop picks up pump water level sensor, and described pump water level sensor connects with opening pump water level float
It connects；
The warning line control loop connects high water level inductor, and the high water level inductor is connect with high water level floating ball.
The control system further includes wire connection terminal；
Wherein, the first overload circuit connects first terminal and Second terminal；
The second overload circuit connects third terminal and forth terminal；
The warning line control loop connects the 5th terminal and the 7th terminal, described pump control loop connect the 6th terminal and
7th terminal；
Described to connect the 8th terminal, the zero curve connects the 9th terminal, and the firewire connects the tenth terminal；
The second pump output loop connects the 11st terminal and the tenth two-terminal；
The first pump output loop connects the 13rd terminal and the 14th terminal.
In another preferred example, the control system includes a spare terminal.
In another preferred example, the control system includes multiple spare terminals.
In another preferred example, autoalarm is equipped in the control system.
In another preferred example, fuse is equipped in the control system.
In another preferred example, air switch is equipped in the control system.
In another preferred example, system running indicator is equipped in the control system.
The system running indicator includes automatically controlling indicator light, controls indicator light, the first water pump operation and the manually
The spare indicator light of two water pumps, the second water pump operation and the spare indicator light of the first water pump, warning water indicator light, the first water pump operation refer to
Show lamp, the first water pump overload light, the second water pump operation indicator light and the second water pump overload light.
In another preferred example, water pump operation state switch is equipped in the control system.
The water pump operation state switch includes automatic/hand switching switch, the first starting mode of pump switch, the first water
Pump shutdown switch, the second starting mode of pump switch and the second water pump shutdown switch.
It should be understood that within the scope of the present invention, above-mentioned each technical characteristic of the invention and have in below (eg embodiment)
It can be combined with each other between each technical characteristic of body description, so as to form new or preferred technical solution.As space is limited, exist
This no longer tires out one by one states.
Description of the drawings
Fig. 1 is the circuit diagram of two failure of pump rotation of prior art dredge pump water pump intelligent control system；
Fig. 2 is prior art dredge pump water pump intelligent control system wiring diagram；
Fig. 3 is to be illustrated using the control panel of the water pump intelligent controller of dredge pump water pump intelligent control system of the present invention
Figure；
Fig. 4 is a kind of typical terminal connecting structure schematic diagram of dredge pump water pump intelligent control system of the present invention；
Fig. 5 is a kind of typical line connection of dredge pump water pump intelligent control system of the present invention.
Each attached figure label is as follows：
KM1、KM2：First A.C. contactor, the second A.C. contactor；
KH1、KH2：First electrothermal relay, the second electrothermal relay；
QF10、QF11：Air switch；
FU1：Fuse；
SA：Change-over switch；
SB1~4：Start-stop button；
KA1~5：Intermediate relay；
HL1：Power supply indicator；
HL2,3：1# is pumped and the instruction of 2# failure of pump；
HL4,5：1# is pumped and the instruction of 2# pump operations；
PE is arranged：Earthing bar；
L1~3：Firewire wire size；
U1, U11, U21, V1, V11, V21, W1, W11 and W21:1# pumps wiring wire size；
U2, U12, U22, V2, V12, V22, W2, W12 and W22：2# pumps wiring wire size.
Specific embodiment
The present inventor after extensive and in-depth study, develops that a kind of wiring is simple for the first time, the few dredge pump of component
Water pump intelligent controller.The present invention is completed on this basis.
The dredge pump water pump intelligent control system of the present invention includes (1) power supply lines：Module provides stabilization in order to control
Voltage, including firewire, zero curve and ground wire；(2) control module, the control module include the first overload circuit, the second mistake
It carries circuit, the first pump output loop, the second pump output loop, play pump control loop and warning line control loop.Wherein,
One overload circuit connects the first electrothermal relay, and the second overload circuit connects the second electrothermal relay；First pump output loop connects the first exchange
The coil of contactor, the second pump output loop connect the coil of the second A.C. contactor；It plays pump control loop and picks up the sensing of water pumping position
Device, this plays pump water level sensor and is connect with opening pump water level float；Warning line control loop connects high water level inductor, the high water level
Inductor is connect with high water level floating ball.
The control system further includes wire connection terminal；Wherein, the first overload circuit connects first terminal and Second terminal；Institute
It states the second overload circuit and connects third terminal and forth terminal；The warning line control loop connects the 5th terminal and the 7th terminal,
Described pump control loop connects the 6th terminal and the 7th terminal；Described to connect the 8th terminal, the zero curve connects the 9th terminal,
The firewire connects the tenth terminal；The second pump output loop connects the 11st terminal and the tenth two-terminal；The first pump output
Circuit connects the 13rd terminal and the 14th terminal.
The dredge pump water pump intelligent control system of the present invention, the start and stop of the automatic/hand of 2 water pumps of realization, overload protection,
Two pump automatic alternates, failure automatically switch, the functions such as failure pump trip.
Manually or automatically pattern may be selected in the control system of the present invention.
Manual mode
Water pump is not controlled by floating ball under manual mode, by " startup " and " stopping " button on panel, realizes corresponding water
The start and stop of pump.
Automatic mode
Under automatic mode when water level rises to " rise and pump position ", the 6th terminal in the second overload circuit is closed, the first exchange
The coil of contactor obtains electric, 1# pump startups, and under water level decreasing to " rise pump position ", 1# pumps stop, and water level is again next time
When rising to " rise and pump position ", then the second ac contactor coil obtains electric, is switched to 2# pumps and first starts, realizes automatic alternate work(
Energy.If 1# pumps break down at work, the first electrothermal relay is attracted the first terminal closure that terminal first overloads circuit, then certainly
Dynamic to be switched to 2# pumps, conversely, when 2# pumps break down at work, the second electrothermal relay is attracted the ground that terminal second overloads circuit
Three terminals are closed, then automatically switch to 1# pumps, realize failure rotation function.When water level reaches " high water level ", i.e., warning line when,
5th terminal is closed, the first A.C. contactor and the second A.C. contactor simultaneously it is electric, two pumps are run simultaneously.
Term
As used herein, term " terminal " refers to wiring terminal, for transmitting electric signal or conductive use.
Main advantages of the present invention include：
(a) dredge pump water pump intelligent control system of the invention, control circuit greatly simplify, do not need to a large amount of wire size and
Complicated wiring substantially shortens the setting up time of staff, improves production efficiency.
(b) dredge pump water pump intelligent control system of the invention, component is few, easy to operate, of low cost.
With reference to specific embodiment, the present invention is further explained.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.Test method without specific conditions in the following example, usually according to conventional strip
Part or according to the normal condition proposed by manufacturer.Unless otherwise stated, otherwise percentage and number are weight percent and weight
Number.
It should be noted that in the claim and specification of this patent, such as first and second or the like relationship
Term is used merely to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying
There are any actual relationship or orders between these entities or operation.Moreover, term " comprising ", "comprising" or its
Any other variant is intended to non-exclusive inclusion so that process, method, article including a series of elements or
Equipment not only include those elements, but also including other elements that are not explicitly listed or further include for this process,
Method, article or the intrinsic element of equipment.In the absence of more restrictions, it is wanted by what sentence limited " including one "
Element, it is not excluded that also there are other identical elements in the process, method, article or apparatus that includes the element.
Embodiment 1
Fig. 3~Fig. 5 is a kind of exemplary embodiment of the present invention.As shown in figure 5, the dredge pump water pump intelligent control system
Including (1) power supply lines：Module provides burning voltage in order to control, including firewire L1~3, zero curve N and ground wire, the system
Power supply is alternating current 220V；(2) control module, the control module include the first overload circuit, the second overload circuit, the
One pump output loop, plays pump control loop and warning line control loop at the second pump output loop.Wherein, first mistake
It carries circuit and meets the first electrothermal relay KH1, the second overload circuit meets the second electrothermal relay KH2；The first pump output loop
The coil of the first A.C. contactor KM1 is connect, the second pump output loop connects the coil of the second A.C. contactor KM2；Described
Pump control loop picks up pump water level sensor SL1, and described pump water level sensor is connect with opening pump water level float；The warning water
Position control loop meets high water level inductor SL2, and the high water level inductor is connect with high water level floating ball.
As shown in figure 4, the control system further includes wire connection terminal；Wherein, the first overload circuit connects 1 He of first terminal
Second terminal 2；The second overload circuit connects third terminal 3 and forth terminal 4；The warning line control loop connects the 5th end
5 and the 7th terminal 7 of son, described pump control loop connect the 6th terminal 6 and the 7th terminal 7；It is described to connect the 8th terminal 8,
The zero curve connects the 9th terminal 9, and the firewire connects the tenth terminal 10；The second pump output loop connects the 11st terminal 11 and the
Ten two-terminals 12；The first pump output loop connects the 13rd terminal 13 and the 14th terminal 14.
Autoalarm is equipped in the control system.Fuse FU1 is equipped in the control system.It is equipped in the control system
Air switch Q F10, Q F11.As shown in figure 3, system running indicator is equipped in the control system.The system operation instruction
Lamp includes automatically controlling indicator light, controls indicator light, the first water pump operation and the spare indicator light of the second water pump, the second water pump manually
Operation and the spare indicator light of the first water pump, warning water indicator light, the first water pump operation indicator light, the first water pump overload light,
Second water pump operation indicator light and the second water pump overload light.Water pump operation state switch is equipped in the control system.
The water pump operation state switch, which includes automatic/hand switching switch, the first starting mode of pump switch, the first water pump, to be stopped opening
It closes, the second starting mode of pump switchs and the second water pump shutdown switch.
Embodiment 2
Manually or automatically pattern may be selected in the control system of the present invention.
(1) manual mode
Water pump is not controlled by floating ball under manual mode, by " startup " and " stopping " button on panel, realizes corresponding water
The start and stop of pump, when having overload fault, KH1 and KH2 are attracted, and terminal 1 and 3 is closed, and water pump stops, and malfunction indicator lamp is bright.
(2) automatic mode
Under automatic mode when water level rises to " rise and pump position ", terminal 6 is closed, and KM1 coils obtain electric, and 1# pump startups work as water
Position drops under " rise and pump position ", and 1# pumps stop, and when water level rises to " rise and pump position " again next time, then KM2 coils obtain
Electricity is switched to 2# pumps and first starts, realizes automatic alternate function.If 1# pumps break down at work, KH1 is attracted terminal 1 and is closed,
2# pumps are then automatically switched to, conversely, when 2# pumps break down at work, KH2 is attracted terminal 3 and is closed, then automatically switches to 1#
Pump realizes failure rotation function.When water level reaches " high water level ", i.e., warning line when, terminal 5 is closed, KM1,2 simultaneously it is electric,
Two pumps are run simultaneously.
The dredge pump water pump intelligent control system of the present invention, control circuit is simple, and component is few, does not need to a large amount of wire size
It is easy to operate with complicated wiring, it is of low cost, substantially shorten the setting up time of staff, improve production efficiency.
All references mentioned in the present invention is incorporated herein by reference, independent just as each document
It is incorporated as with reference to such.In addition, it should also be understood that, after reading the above teachings of the present invention, those skilled in the art can
To be made various changes or modifications to the present invention, such equivalent forms equally fall within the model that the application the appended claims are limited
It encloses.
Claims (10)
1. a kind of dredge pump water pump intelligent control system, which is characterized in that the control system includes (1) power supply lines：
Module provides burning voltage in order to control, including firewire, zero curve and ground wire；
(2) control module, the control module include the first overload circuit, the second overload circuit, the first pump output loop, the
Two pump output loops play pump control loop and warning line control loop；
Wherein, the first overload circuit connects the first electrothermal relay, and the second overload circuit connects the second electrothermal relay；
The first pump output loop connects the coil of the first A.C. contactor, and the second pump output loop connects the second ac contactor
The coil of device；
Described pump control loop picks up pump water level sensor, and described pump water level sensor is connect with opening pump water level float；
The warning line control loop connects high water level inductor, and the high water level inductor is connect with high water level floating ball.
2. control system according to claim 1, which is characterized in that the control system further includes wire connection terminal；
Wherein, the first overload circuit connects first terminal and Second terminal；
The second overload circuit connects third terminal and forth terminal；
The warning line control loop connects the 5th terminal and the 7th terminal, and described pump control loop meets the 6th terminal and the 7th
Terminal；
Described to connect the 8th terminal, the zero curve connects the 9th terminal, and the firewire connects the tenth terminal；
The second pump output loop connects the 11st terminal and the tenth two-terminal；
The first pump output loop connects the 13rd terminal and the 14th terminal.
3. control system according to claim 2, which is characterized in that the control system includes one or more spare
Terminal.
4. control system according to claim 1, which is characterized in that autoalarm is equipped in the control system.
5. control system according to claim 1, which is characterized in that fuse is equipped in the control system.
6. control system according to claim 1, which is characterized in that air switch is equipped in the control system.
7. control system according to claim 1, which is characterized in that system operation is equipped in the control system and is indicated
Lamp.
8. control system according to claim 7, which is characterized in that the system running indicator includes automatically controlling finger
Show lamp, control indicator light, the first water pump operation and the spare indicator light of the second water pump, the second water pump operation and the first water pump standby manually
It is indicated with indicator light, warning water indicator light, the first water pump operation indicator light, the first water pump overload light, the second water pump operation
Lamp and the second water pump overload light.
9. control system according to claim 1, which is characterized in that cut in the control system equipped with water pump operation state
Change switch.
10. control system according to claim 9, which is characterized in that the water pump operation state switch is included certainly
Dynamic/manual switch, the first starting mode of pump switch, the first water pump shutdown switch, the second starting mode of pump switch and the second water pump
Shutdown switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611152078.0A CN108227599B (en) | 2016-12-14 | 2016-12-14 | Intelligent control system for sewage pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611152078.0A CN108227599B (en) | 2016-12-14 | 2016-12-14 | Intelligent control system for sewage pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108227599A true CN108227599A (en) | 2018-06-29 |
| CN108227599B CN108227599B (en) | 2024-05-14 |
Family
ID=62639011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611152078.0A Active CN108227599B (en) | 2016-12-14 | 2016-12-14 | Intelligent control system for sewage pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108227599B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110552872A (en) * | 2019-10-18 | 2019-12-10 | 哈尔滨朗昇电气股份有限公司 | Intelligent water pump controller and control method |
| CN114183331A (en) * | 2021-12-10 | 2022-03-15 | 浙江中杭水泵股份有限公司 | Remote control system of high-efficient dredge pump |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202651876U (en) * | 2012-05-16 | 2013-01-02 | 潍坊市飞虹电气成套设备有限公司 | Sewage pump dual power intelligent protection controlling device |
| CN203394724U (en) * | 2013-08-16 | 2014-01-15 | 上海太平洋制泵(集团)有限公司 | Automatic submersible sewage pump alternation control system |
| CN203759554U (en) * | 2014-04-09 | 2014-08-06 | 淮南矿业(集团)有限责任公司 | Automatic water supply control system |
| CN203800846U (en) * | 2014-04-29 | 2014-08-27 | 成都富强电子电器科技有限公司 | Intelligent dual-pump controller rear cover wiring circuit |
| RU151016U1 (en) * | 2014-04-23 | 2015-03-20 | Государственное научное учреждение Смоленский научно-исследовательский институт сельского хозяйства Российской академии сельскохозяйственных наук | DEVICE FOR AUTOMATIC CONTROL OF ELECTRIC PUMP UNIT BY THE LEVEL AND PRESSURE OF WATER IN A WATER PRESSURE TOWER |
| CN105386969A (en) * | 2015-12-11 | 2016-03-09 | 天津市威匡电气设备有限公司 | Control circuit for two draining pumps |
| CN205475596U (en) * | 2016-04-11 | 2016-08-17 | 国网山东省电力公司阳信县供电公司 | Automatic drainage system of transformer substation |
-
2016
- 2016-12-14 CN CN201611152078.0A patent/CN108227599B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202651876U (en) * | 2012-05-16 | 2013-01-02 | 潍坊市飞虹电气成套设备有限公司 | Sewage pump dual power intelligent protection controlling device |
| CN203394724U (en) * | 2013-08-16 | 2014-01-15 | 上海太平洋制泵(集团)有限公司 | Automatic submersible sewage pump alternation control system |
| CN203759554U (en) * | 2014-04-09 | 2014-08-06 | 淮南矿业(集团)有限责任公司 | Automatic water supply control system |
| RU151016U1 (en) * | 2014-04-23 | 2015-03-20 | Государственное научное учреждение Смоленский научно-исследовательский институт сельского хозяйства Российской академии сельскохозяйственных наук | DEVICE FOR AUTOMATIC CONTROL OF ELECTRIC PUMP UNIT BY THE LEVEL AND PRESSURE OF WATER IN A WATER PRESSURE TOWER |
| CN203800846U (en) * | 2014-04-29 | 2014-08-27 | 成都富强电子电器科技有限公司 | Intelligent dual-pump controller rear cover wiring circuit |
| CN105386969A (en) * | 2015-12-11 | 2016-03-09 | 天津市威匡电气设备有限公司 | Control circuit for two draining pumps |
| CN205475596U (en) * | 2016-04-11 | 2016-08-17 | 国网山东省电力公司阳信县供电公司 | Automatic drainage system of transformer substation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110552872A (en) * | 2019-10-18 | 2019-12-10 | 哈尔滨朗昇电气股份有限公司 | Intelligent water pump controller and control method |
| CN114183331A (en) * | 2021-12-10 | 2022-03-15 | 浙江中杭水泵股份有限公司 | Remote control system of high-efficient dredge pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108227599B (en) | 2024-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3021052B1 (en) | Air conditioner | |
| CN108227599A (en) | Dredge pump water pump intelligent control system | |
| CN104110800A (en) | Air conditioner, and on-off control method and on-off control system for resistive load | |
| CN108168048A (en) | Identify the method, apparatus and air-conditioning of air-conditioning circuit | |
| CN205248191U (en) | Electromagnetic relay system with it is redundant | |
| CN206235867U (en) | Dredge pump water pump intelligent control system | |
| CN110145460B (en) | Double-water-pump alternate start-stop control loop | |
| CN104242235A (en) | Limit switch bypass in roundtripping equipment | |
| CN103135059A (en) | Battery short-circuiting circuit and battery short circuit testing method | |
| CN208333741U (en) | Mechanical electric contact pressure gauge new controller | |
| CN104914748A (en) | Marine pump control circuit | |
| CN202663088U (en) | Phase sequence recognition control device of electromotor | |
| CN115453405A (en) | Fault detection device in charging equipment, charging equipment and fault detection method thereof | |
| CN207442712U (en) | Frequency conversion fan tests power supply | |
| CN101989073B (en) | Relay control circuit and relay control system | |
| CN201611861U (en) | Star-delta reduced voltage starter of electromotor | |
| CN219197612U (en) | Pressure reducing and pump stopping device | |
| CN203745550U (en) | Three-phase power source phase loss detecting device | |
| CN208348035U (en) | Water pump control circuit and water pump | |
| CN104377804A (en) | Control system of PLC controllable dual-power switch | |
| CN220382964U (en) | Control system of double-drive low-voltage motor | |
| CN107894785A (en) | Water pump control circuit | |
| CN107910853B (en) | AC three-phase intelligent module | |
| CN203963910U (en) | Boiler controlling device | |
| CN206332437U (en) | Water pump with open-phase protection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |