CN104234990A - Output-power-self-adapting refrigeration compressor control system - Google Patents
Output-power-self-adapting refrigeration compressor control system Download PDFInfo
- Publication number
- CN104234990A CN104234990A CN201410556379.4A CN201410556379A CN104234990A CN 104234990 A CN104234990 A CN 104234990A CN 201410556379 A CN201410556379 A CN 201410556379A CN 104234990 A CN104234990 A CN 104234990A
- Authority
- CN
- China
- Prior art keywords
- relay
- refrigeration compressor
- coil
- tenminal block
- control system
- 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
Landscapes
- Control Of Ac Motors In General (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
An output-power-self-adapting refrigeration compressor control system which comprises a refrigeration compressor and a control system body. The refrigeration compressor is provided with a sealed shell. A machine core assembly is arranged in the shell. A motor is arranged on the machine core assembly and is provided with a stator, a rotor and a wire holder. A connection terminal I, a connection terminal VI and a connection terminal VII are arranged on the wire holder. The output-power-self-adapting refrigeration compressor control system is characterized in that the control system body comprises a PLC, a current collection module, a temperature collection module and a low-voltage control circuit; the wire holder is further provided with a connection terminal II, a connection terminal III, a connection terminal IV and a connection terminal V, the PLC is connected with the current collection module, the temperature collection module and the low-voltage control circuit in a communication mode, and the low-voltage control circuit is connected with the refrigeration compressor in a driving mode. The output-power-self-adapting refrigeration compressor control system is low in cost and convenient to operate, intelligent conversion of the three working states of the refrigeration compressor is achieved, the working efficiency of the refrigeration compressor is improved, the overall energy consumption of the refrigeration compressor is reduced, the refrigeration time is shortened, and the refrigeration efficiency is improved.
Description
Technical field
The present invention relates to a kind of control system of chiller plant, the adaptive refrigeration compressor control system of especially a kind of output power.
Background technique
Along with the continuous propelling of energy-saving and emission-reduction paces, to the horsepower requirements of chiller plant also continuous lifting.In daily life, refrigerator is as the widely used chiller plant of one, and the reduction of its operation energy consumption is particularly important to energy-conservation effect.In chiller plant (refrigerator), small-sized totally-enclosed refrigerating compressor is as the heart of whole system refrigeration work, and the service behaviour of refrigeration compressor directly affects energy consumption for cooling.Existing refrigeration compressor has closed shell, movement assembly is housed in closed shell, movement assembly has motor, motor has stator, rotor and wiring base, wiring base is arranged on the totally enclosed type shell of refrigeration compressor, wiring base is provided with three tenminal blocks, stator is made up of stator iron core and staor winding, staor winding is made up of main winding and secondary winding, together with wherein the end of main winding is connected directly between with the head end of secondary winding, and be connected with the tenminal block on wiring base by the neutral line at tie point, and the head end of main winding is connected with two other tenminal block on wiring base respectively by lighting outlet with the end of secondary winding.
As can be seen here, because the staor winding winding mode of existing refrigeration compressor motor internal is single, thus making refrigeration compressor have following shortcoming: refrigeration compressor only has an optimum working efficiency point, and during real work operation, the output power of refrigeration compressor constantly changes along with the load of outside, and the temperature of external load and box house is proportionate.Temperature is dragged down to stable maintenance low temperature from chiller plant (refrigerator) start, the load of refrigeration compressor is a process from high to low, namely the working load of refrigeration compressor is also a process changed from high in the end, and refrigeration compressor cannot when high load and low-load, all reach peak efficiency, thus causing the power consumption of refrigeration compressor large, working efficiency is low.
In order to overcome the above problems, existing most of chiller plant (as refrigerator, air-conditioning etc.) all adopts frequency variator to reach the object of refrigeration compressor being carried out to intelligent control.Although frequency variator is according to the temperature of box house, control the switching on and shutting down time of refrigeration compressor and the motion speed by VFC refrigeration compressor, thus greatly saved the use of electric energy, but frequency variator not only occupies a large amount of inner spaces, and cost is high, the more important thing is, frequency variator carries out VFC to refrigeration compressor, fundamentally do not solve the problem that refrigeration compressor only has an optimum efficiency operation point, do not utilized most effectively from refrigeration compressor in general, refrigerating efficiency is not high.
Summary of the invention
Object of the present invention is exactly to solve current refrigeration compressor control system, adopt frequency variator input cost high, the inner space taken is large, the effective rate of utilization of refrigeration compressor is low simultaneously, the problem that refrigerating efficiency is not high, provides a kind of output power adaptive refrigeration compressor control system for this reason.
Concrete scheme of the present invention is: the adaptive refrigeration compressor control system of a kind of output power, include refrigeration compressor and control system, refrigeration compressor has closed shell, movement assembly is housed in closed shell, motor is included in movement assembly, motor has stator, rotor and wiring base, and wiring base is arranged on the outer wall of closed shell, and wiring base is provided with No. I, No. VI and No. VII tenminal block; It is characterized in that: control system comprises PLC, current acquisition module and temperature collect module and low-voltage control circuit, PLC and current acquisition module, temperature collect module form communication and are connected, and low-voltage control circuit and PLC form to drive and be connected; Described wiring base is also provided with No. II, No. III, No. IV and No. V tenminal block, described No. I is connected with the live wire of AC220V power supply with No. VI tenminal block, and No. VII tenminal block is connected with the zero line of AC220V power supply; Described low-voltage control circuit is connected with AC220V power supply, form by three tunnel series loops are parallel with one another, wherein first via series loop is composed in series successively by the normally opened contact KS1-1 of the coil of relay K 1 and the normally-closed contact K2-1 of relay K 2, the normally-closed contact K3-1 of relay K 3 and external control relay K S1; Second tunnel series loop is composed in series successively by the normally opened contact KS2-1 of the coil of relay K 2 and the normally-closed contact K1-1 of relay K 1, the normally-closed contact K3-2 of relay K 3 and external control relay K S2; 3rd tunnel series loop is composed in series successively by the normally opened contact KS3-1 of the coil of relay K 3 and the normally-closed contact K1-2 of relay K 1, the normally-closed contact K2-2 of relay K 2 and external control relay K S3; Wherein the normally opened contact K1-3 of relay K 1 is connected between No. I and No. III tenminal block, normally opened contact K1-4 is connected between No. II and No. IV tenminal block, the normally opened contact K2-3 of relay K 2 is connected between No. II and No. III tenminal block, and the normally opened contact K3-3 of relay K 3 is connected between No. II and No. V tenminal block; Described PLC and external control relay K S1, KS2 and KS3 all form to drive and are connected.
Temperature collect module described in the present invention has PT100 temperature transducer, and PT100 temperature transducer and PLC form to drive and be connected.
The module of current acquisition described in the present invention has current transformer, and current transformer is arranged on the live wire of AC220V power supply, and the two ends of current transformer Inside coil consist of wire and PLC and are electrically connected.
Stator described in the present invention is made up of stator iron core and staor winding, and staor winding has main winding and secondary winding, and main winding has loop A, B, C, D, and its coil C and coil D forms parallel wound coil; The head end of loop A is connected with No. II tenminal block with No. I respectively with end; The head end of coil B is connected with No. III tenminal block, and the middle part of coil B is connected with No. V tenminal block by lighting outlet, and the end of coil B is connected with the head end of parallel wound coil, and is connected with No. IV tenminal block by lighting outlet at tie point; The end of parallel wound coil is connected with the head end of secondary winding, and is provided with the neutral line be connected with No. VII tenminal block at tie point, and the end of secondary winding is connected with No. VI tenminal block by lighting outlet.
The present invention has the following advantages:
(1) the present invention is by the control system frequency variator that replaces existing control refrigeration compressor motor internal to run of PLC, current acquisition module and temperature collect module and low-voltage control circuit composition, not only with low cost, and decrease external circuit the taking chiller plant (refrigerator) inner space of refrigeration compressor, improve the market competitiveness.
(2) the present invention changes the present situation that refrigeration compressor only has a best power point, avoid refrigeration compressor when chiller plant (refrigerator) is badly in need of cooling, run up an operation point, thus bring larger frictional loss, affect compression efficiency and the working life of refrigeration compressor.
(3) the present invention achieves intelligent conversion between refrigeration compressor three working staties by control circuit, not only reduce the overall energy consumption of refrigeration compressor, improve the working efficiency of refrigeration compressor, and be more convenient for regulating in a wide range the refrigerating capacity of refrigeration compressor, shorten the cooling time of chiller plant (refrigerator), improve refrigerating efficiency.
Accompanying drawing explanation
Fig. 1 is control principle drawing of the present invention;
Fig. 2 is the structural representation of movement assembly in the present invention;
Fig. 3 be in the present invention movement assembly at the mounting structure schematic diagram (sectional view) of refrigeration compressor inside;
Fig. 4 is the first mode of connection schematic diagram of staor winding in the present invention;
Fig. 5 is the Second Linking Method mode schematic diagram of staor winding in the present invention;
Fig. 6 is the third mode of connection schematic diagram of staor winding in the present invention.
In figure: 1-refrigeration compressor, 2-closed shell, 3-motor, 4-stator, 5-rotor, 6-wiring base, 7-PLC, 8-current acquisition module, 9-temperature collect module, 10-low-voltage control circuit, 11-live wire, 12-zero line, 13-stator iron core, 14-staor winding, 15-main winding, 16-secondary winding, 17-loop A, 18-coil B, 19-coil C, 20-coil D.
Embodiment
See Fig. 1, Fig. 2, Fig. 3, the present invention has refrigeration compressor 1, refrigeration compressor 1 includes closed shell 2 and control system, movement assembly is housed in closed shell 2, motor 3 is included in movement assembly, motor 3 has stator 4, rotor 5 and wiring base 6, and wiring base 6 is arranged on the outer wall of closed shell 2, and wiring base 6 is provided with No. I, No. VI and No. VII tenminal block; Particularly, control system comprises PLC 7, current acquisition module 8 and temperature collect module 9 and low-voltage control circuit 10, PLC 7 forms communication with current acquisition module 8, temperature collect module 9 and is connected, and low-voltage control circuit 10 forms to drive with PLC 7 and is connected; Described wiring base 6 is also provided with No. II, No. III, No. IV and No. V tenminal block, described No. I is connected with the live wire 11 of AC220V power supply with No. VI tenminal block, and No. VII tenminal block is connected with the zero line 12 of AC220V power supply; Described low-voltage control circuit 10 is connected with AC220V power supply, form by three tunnel series loops are parallel with one another, wherein first via series loop is composed in series successively by the normally opened contact KS1-1 of the coil of relay K 1 and the normally-closed contact K2-1 of relay K 2, the normally-closed contact K3-1 of relay K 3 and external control relay K S1; Second tunnel series loop is composed in series successively by the normally opened contact KS2-1 of the coil of relay K 2 and the normally-closed contact K1-1 of relay K 1, the normally-closed contact K3-2 of relay K 3 and external control relay K S2; 3rd tunnel series loop is composed in series successively by the normally opened contact KS3-1 of the coil of relay K 3 and the normally-closed contact K1-2 of relay K 1, the normally-closed contact K2-2 of relay K 2 and external control relay K S3; Wherein the normally opened contact K1-3 of relay K 1 is connected between No. I and No. III tenminal block, normally opened contact K1-4 is connected between No. II and No. IV tenminal block, the normally opened contact K2-3 of relay K 2 is connected between No. II and No. III tenminal block, and the normally opened contact K3-3 of relay K 3 is connected between No. II and No. V tenminal block; Described PLC 7 and external control relay K S1, KS2 and KS3 all form to drive and are connected.
Temperature collect module 9 described in the present embodiment has PT100 temperature transducer, PT100 temperature transducer forms to drive with PLC 7 and is connected, see Fig. 1, wherein PT100 temperature transducer is arranged on the inside of chiller plant (refrigerator), for collecting temperature signal.
The module of current acquisition described in the present embodiment 8 has current transformer, and current transformer is arranged on the live wire 11 of AC220V power supply, and the two ends of current transformer Inside coil consist of wire and PLC 7 and are electrically connected, see Fig. 1.
It is inner that refrigeration compressor 1 described in the present embodiment and PLC 7 and low-voltage control circuit 10 are installed in chiller plant (refrigerator).
See Fig. 4, Fig. 5, Fig. 6, stator 4 described in the present embodiment is made up of stator iron core 13 and staor winding 14, staor winding 14 has main winding 15 and secondary winding 16, and main winding has loop A 17, coil B18, coil C19, coil D20, and its coil C19 and coil D20 forms parallel wound coil; The head end of loop A 17 is connected with No. II tenminal block with No. I respectively with end; The head end of coil B18 is connected with No. III tenminal block, and the middle part of coil B18 is connected with No. V tenminal block by lighting outlet, and the end of coil B18 is connected with the head end of parallel wound coil, and is connected with No. IV tenminal block by lighting outlet at tie point; The end of parallel wound coil is connected with the head end of secondary winding 16, and is provided with the neutral line be connected with No. VII tenminal block at tie point, and the end of secondary winding 16 is connected with No. VI tenminal block by lighting outlet.
See Fig. 1, the present embodiment repeat circuit K1, relay K 2 and relay K 3 are in three tunnel series loops, connected by the normally-closed contact of respective coil with other two relays, achieve relay K 1, interlocking between relay K 2 and relay K 3 controls, thus by low-voltage control circuit 10 and PLC 7, the intelligence that the control system that current acquisition module 8 and temperature collect module 9 form achieves between refrigeration compressor 1 internal stator winding 14 3 kinds of modes of connection switches, refrigeration compressor 1 is made to have three kinds of working staties, these three kinds of working staties are separate, do not interfere with each other, and often kind of working state, refrigeration compressor 1 all has a best working efficiency point.
Specific works mode of the present invention is as follows: the present invention is by current transformer and PT100 temperature transducer, gather the load current signal of refrigeration compressor 1 and the temperature signal of chiller plant (refrigerator) inside respectively, PLC 7 judges the load current signal that collects and temperature signal by built-in control program analysis, thus the working state of drived control external control relay K S1, KS2 and KS3.
When external control relay K S1 adhesive, the normally opened contact KS1-1 of first via series loop China and foreign countries controlled relay KS1 closes, the coil of relay K 1 obtains electric, thus the normally opened contact K1-3 of control relay K1 and K1-4 adhesive, now the mode of connection of the staor winding 14 of refrigeration compressor 1 is: No. I is connected with No. III tenminal block, No. II is connected with No. IV tenminal block, namely in staor winding 14 loop A 17 of main winding 15 and coil B18 parallel with one another, the shunt winding that loop A 17 and coil B18 form is connected mutually with the parallel wound coil that coil C19 and coil D20 form, see Fig. 4.
When external control relay K S2 adhesive, the normally opened contact KS2-1 of the second series loop China and foreign countries, tunnel controlled relay KS2 closes, the coil of relay K 2 obtains electric, thus the normally opened contact K2-3 adhesive of control relay K2, now the mode of connection of the staor winding 14 of refrigeration compressor 1 is: No. II is connected with No. III tenminal block, namely in staor winding 14, the loop A 17 of main winding 15 and coil B18 connect mutually, the series winding that loop A 17 and coil B18 form is connected, see Fig. 5 mutually with the parallel wound coil that coil C19 and coil D20 form.
When external control relay K S3 adhesive, the normally opened contact KS3-1 of the 3rd series loop China and foreign countries, tunnel controlled relay KS3 closes, the coil of relay K 3 obtains electric, thus the normally opened contact K3-3 adhesive of control relay K3, now the mode of connection of the staor winding 14 of refrigeration compressor 1 is: No. II is connected with No. V tenminal block, namely a part of coil that in staor winding 14, the loop A 17 of main winding 15 and the middle part of coil B18 form to end is connected mutually, and the parallel wound coil that this series winding forms with coil C19 and coil D20 is connected, mutually see Fig. 6.
The present invention adopts above-mentioned control mode to achieve the intelligent conversion of staor winding 14 3 kinds of modes of connection, make refrigeration compressor 1 under different loading conditions, be in three kinds of different working staties, and all obtain higher working efficiency in each working state, thus greatly reduce energy consumption.
Claims (4)
1. the adaptive refrigeration compressor control system of output power, include refrigeration compressor and control system, refrigeration compressor has closed shell, movement assembly is housed in closed shell, motor is included in movement assembly, motor has stator, rotor and wiring base, and wiring base is arranged on the outer wall of closed shell, and wiring base is provided with No. I, No. VI and No. VII tenminal block; It is characterized in that: control system comprises PLC, current acquisition module and temperature collect module and low-voltage control circuit, PLC and current acquisition module, temperature collect module form communication and are connected, and low-voltage control circuit and PLC form to drive and be connected; Described wiring base is also provided with No. II, No. III, No. IV and No. V tenminal block, described No. I is connected with the live wire of AC220V power supply with No. VI tenminal block, and No. VII tenminal block is connected with the zero line of AC220V power supply; Described low-voltage control circuit is connected with AC220V power supply, form by three tunnel series loops are parallel with one another, wherein first via series loop is composed in series successively by the normally opened contact KS1-1 of the coil of relay K 1 and the normally-closed contact K2-1 of relay K 2, the normally-closed contact K3-1 of relay K 3 and external control relay K S1; Second tunnel series loop is composed in series successively by the normally opened contact KS2-1 of the coil of relay K 2 and the normally-closed contact K1-1 of relay K 1, the normally-closed contact K3-2 of relay K 3 and external control relay K S2; 3rd tunnel series loop is composed in series successively by the normally opened contact KS3-1 of the coil of relay K 3 and the normally-closed contact K1-2 of relay K 1, the normally-closed contact K2-2 of relay K 2 and external control relay K S3; Wherein the normally opened contact K1-3 of relay K 1 is connected between No. I and No. III tenminal block, normally opened contact K1-4 is connected between No. II and No. IV tenminal block, the normally opened contact K2-3 of relay K 2 is connected between No. II and No. III tenminal block, and the normally opened contact K3-3 of relay K 3 is connected between No. II and No. V tenminal block; Described PLC and external control relay K S1, KS2 and KS3 all form to drive and are connected.
2. the adaptive refrigeration compressor control system of a kind of output power according to claim 1, is characterized in that: described temperature collect module has PT100 temperature transducer, and PT100 temperature transducer and PLC form to drive and be connected.
3. the adaptive refrigeration compressor control system of a kind of output power according to claim 1, it is characterized in that: described current acquisition module has current transformer, current transformer is arranged on the live wire of AC220V power supply, and the two ends of current transformer Inside coil consist of wire and PLC and are electrically connected.
4. the adaptive refrigeration compressor control system of a kind of output power according to claim 1, it is characterized in that: described stator is made up of stator iron core and staor winding, staor winding has main winding and secondary winding, main winding has loop A, B, C, D, and its coil C and coil D forms parallel wound coil; The head end of loop A is connected with No. II tenminal block with No. I respectively with end; The head end of coil B is connected with No. III tenminal block, and the middle part of coil B is connected with No. V tenminal block by lighting outlet, and the end of coil B is connected with the head end of parallel wound coil, and is connected with No. IV tenminal block by lighting outlet at tie point; The end of parallel wound coil is connected with the head end of secondary winding, and is provided with the neutral line be connected with No. VII tenminal block at tie point, and the end of secondary winding is connected with No. VI tenminal block by lighting outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410556379.4A CN104234990B (en) | 2014-10-20 | 2014-10-20 | The adaptive refrigeration compressor control system of a kind of output power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410556379.4A CN104234990B (en) | 2014-10-20 | 2014-10-20 | The adaptive refrigeration compressor control system of a kind of output power |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104234990A true CN104234990A (en) | 2014-12-24 |
| CN104234990B CN104234990B (en) | 2016-04-06 |
Family
ID=52223723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410556379.4A Active CN104234990B (en) | 2014-10-20 | 2014-10-20 | The adaptive refrigeration compressor control system of a kind of output power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104234990B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109210708A (en) * | 2018-08-23 | 2019-01-15 | 青岛海尔空调器有限总公司 | Cooler compressor control method, control device and air conditioner |
| CN109210710A (en) * | 2018-08-23 | 2019-01-15 | 青岛海尔空调器有限总公司 | Method and device based on human comfort control compressor of air conditioner |
| CN109210709A (en) * | 2018-08-23 | 2019-01-15 | 青岛海尔空调器有限总公司 | Method and apparatus based on human comfort control compressor of air conditioner |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1707106A (en) * | 2004-06-04 | 2005-12-14 | 三星电子株式会社 | Reciprocating compressor, driving unit and control method for the same |
| US20070081902A1 (en) * | 2005-10-06 | 2007-04-12 | Ling Zhang | Digital Air Compressor Control System |
| JP2009156236A (en) * | 2007-12-27 | 2009-07-16 | Toshiba Carrier Corp | Compressor driving device and refrigerating cycle device |
| CN202004604U (en) * | 2011-04-07 | 2011-10-05 | 南阳高特电机有限公司 | Multi-winding serial-connection variable-capacity induction motor and control device thereof |
| CN202125419U (en) * | 2011-04-28 | 2012-01-25 | 徐跃 | Frequency conversion and electricity-saving device of air compressor |
| CN102979712A (en) * | 2012-12-15 | 2013-03-20 | 合肥同智机电控制技术股份有限公司 | Electric compressor controller for automobile air conditioner |
| WO2014078527A1 (en) * | 2012-11-16 | 2014-05-22 | Emerson Climate Technologies, Inc. | Compressor crankcase heating control systems and methods |
-
2014
- 2014-10-20 CN CN201410556379.4A patent/CN104234990B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1707106A (en) * | 2004-06-04 | 2005-12-14 | 三星电子株式会社 | Reciprocating compressor, driving unit and control method for the same |
| US20070081902A1 (en) * | 2005-10-06 | 2007-04-12 | Ling Zhang | Digital Air Compressor Control System |
| JP2009156236A (en) * | 2007-12-27 | 2009-07-16 | Toshiba Carrier Corp | Compressor driving device and refrigerating cycle device |
| CN202004604U (en) * | 2011-04-07 | 2011-10-05 | 南阳高特电机有限公司 | Multi-winding serial-connection variable-capacity induction motor and control device thereof |
| CN202125419U (en) * | 2011-04-28 | 2012-01-25 | 徐跃 | Frequency conversion and electricity-saving device of air compressor |
| WO2014078527A1 (en) * | 2012-11-16 | 2014-05-22 | Emerson Climate Technologies, Inc. | Compressor crankcase heating control systems and methods |
| CN102979712A (en) * | 2012-12-15 | 2013-03-20 | 合肥同智机电控制技术股份有限公司 | Electric compressor controller for automobile air conditioner |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109210708A (en) * | 2018-08-23 | 2019-01-15 | 青岛海尔空调器有限总公司 | Cooler compressor control method, control device and air conditioner |
| CN109210710A (en) * | 2018-08-23 | 2019-01-15 | 青岛海尔空调器有限总公司 | Method and device based on human comfort control compressor of air conditioner |
| CN109210709A (en) * | 2018-08-23 | 2019-01-15 | 青岛海尔空调器有限总公司 | Method and apparatus based on human comfort control compressor of air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104234990B (en) | 2016-04-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104234990B (en) | The adaptive refrigeration compressor control system of a kind of output power | |
| CN104878969B (en) | A kind of lift-sliding parking equipment of transducer drive | |
| CN203098342U (en) | Control device of cooling fan of generator circuit breaker | |
| CN204068804U (en) | A kind of many power AC asynchronous motor control device | |
| CN204068485U (en) | A kind of adjustable output power motor for refrigerant compressor | |
| CN201616309U (en) | Capacitive induction-type magnetic latching electromagnetic apparatus | |
| CN207304136U (en) | Tune electric equipment and system free of discontinuities | |
| CN104269952B (en) | A kind of adjustable output power motor for refrigeration compressor | |
| CN218733976U (en) | Frequency conversion controller system for oil field | |
| CN111608670A (en) | Shield segment assembling device capable of rotating by 360 degrees | |
| CN215830665U (en) | Electromagnetic piston type compressor | |
| CN202488402U (en) | Variable-frequency energy-saving protection device for oil field | |
| CN201918750U (en) | Electricity-saving management device of power transmission line online monitoring terminal equipment | |
| CN204992770U (en) | 10kV feeder monitor terminal suitable for permanent magnetism switch | |
| CN203950658U (en) | Isolated loaded capacity regulating voltage regulating switch | |
| CN100594985C (en) | Circulating oil-cooling type electric-magnetic iron remover | |
| CN203851077U (en) | Automatic output power conversion control system for multi-torque motors | |
| CN202817910U (en) | Piconet system measuring and controlling terminal device | |
| CN206098279U (en) | Magnetic control formula high speed circuit -breaker | |
| CN205807766U (en) | A kind of energy-conservation communication base station | |
| CN202493410U (en) | Solar water pump | |
| CN203747507U (en) | Intelligent switching device used for communication channels | |
| CN203301156U (en) | Low-voltage reactive-power compensation cabinet | |
| CN202019236U (en) | Magnetic steel structure of outer stator of motor | |
| CN219875533U (en) | Efficient energy-saving PLC frequency conversion cabinet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210621 Address after: No.6, East Jinshan Avenue, Huangshi economic and Technological Development Zone, Huangshi City, Hubei Province Patentee after: Huangshi Dongbei Compressor Co.,Ltd. Address before: No.6, East Jinshan Avenue, Huangshi economic and Technological Development Zone, Hubei Province Patentee before: Huangshi Dongbei Electrical Appliance Co.,Ltd. |