CN110529371A - A kind of protective device of compressor, method and compressor - Google Patents
A kind of protective device of compressor, method and compressor Download PDFInfo
- Publication number
- CN110529371A CN110529371A CN201910764601.2A CN201910764601A CN110529371A CN 110529371 A CN110529371 A CN 110529371A CN 201910764601 A CN201910764601 A CN 201910764601A CN 110529371 A CN110529371 A CN 110529371A
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- China
- Prior art keywords
- compressor
- temperature
- electric current
- transmitter
- control panel
- 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.)
- Pending
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- 230000001681 protective effect Effects 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000001939 inductive effect Effects 0.000 claims abstract description 69
- 230000036413 temperature sense Effects 0.000 claims abstract description 45
- 239000004020 conductor Substances 0.000 claims abstract description 26
- 230000006698 induction Effects 0.000 claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 238000004458 analytical method Methods 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims 1
- 230000001012 protector Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
Abstract
The present invention provides a kind of protective device of compressor, method and compressor, including compressor and protective device, compressor includes shell, conductor wire, motor, the seal chamber that control panel and shell are formed, protective device includes at least one electric current inductive transmitter, at least one temperature sense transmitter, electric current inductive transmitter and the temperature sense transmitter can be installed in seal chamber or on the outer surface of shell, wireless transmitter module is equipped on electric current inductive transmitter and temperature sense transmitter, electric current inductive transmitter is connected with induction coil, induction coil is wrapped on the conductor wire, control panel is equipped with data sink.The electric current and temperature that the present invention passes through induction compressor; electric current and temperature data are sent to control panel by way of wireless transmission; control panel controls the on/off of compressor according to electric current and temperature data; the high current and high-voltage impact protective device avoided result in, improves service life, precision and the versatility of protective device.
Description
Technical field
The present invention relates to compressor protection fields, and in particular to a kind of protective device of compressor, method and compressor.
Background technique
Existing compressor protector is mounted in upper cover or compressor chamber, is connected to main circuit, detection compressor high temperature and
It is protected after high current.Protector connects on the main circuit, and main circuit is connected with high current, and disconnection has high-voltage arc discharge, causes to overload the longevity
Life is limited, easy scaling loss；Different compressors current characteristics and temperature characterisitic difference are big, result in the need for the guarantor for developing a large amount of different models
Device is protected, and the current curve regularity of part type is poor, easily leads to that compressor protector type selecting is difficult or unreasonable and generation is former
Barrier.
Summary of the invention
A kind of protective device of compressor, side are provided it is an object of the invention to overcome shortcoming in the prior art
Method and compressor avoid high current and high voltage from impacting protector, greatly improve the service life of protector, improve the precision of protection
And versatility.
The purpose of the present invention is achieved through the following technical solutions:
In a first aspect, the present invention provides a kind of protective device of compressor, including compressor and protective device, the compressor packet
The seal chamber that shell, conductor wire, motor, control panel and the shell are formed is included, the motor passes through conductor wire connection electricity
Source, the control panel and the motor are electrically connected by the conductor wire, and the protective device includes at least one electric current induction hair
Emitter, at least one temperature sense transmitter, the electric current inductive transmitter and the temperature sense transmitter can be installed within
In the seal chamber or on the outer surface of the shell, it is all provided on the electric current inductive transmitter and the temperature sense transmitter
There is wireless transmitter module, the electric current inductive transmitter is connected with induction coil, and the induction coil is wrapped in the conductor wire
On, the control panel is equipped with data sink.
Further, the electric current inductive transmitter quantity is 1, and the temperature sense transmitter quantity is 1, described
The current temperature inductive transmitter that electric current inductive transmitter and the temperature sense emitter set are integrally formed.
Further, the current temperature inductive transmitter is mounted in the seal chamber or the outer surface of the shell
On.
Further, the electric current inductive transmitter quantity is 1, and the temperature sense transmitter quantity is 1, described
Electric current inductive transmitter and/or the temperature sense transmitter, which are mounted on, to be installed in the seal chamber and/or the shell
On outer surface.
Further, the electric current inductive transmitter quantity is 3, and the temperature sense transmitter quantity is 1, described
The induction coil of electric current inductive transmitter connection is respectively wound around on any 3 conductor wires for having electric current to pass through, the electric current sense
The current temperature inductive transmitter for answering transmitter and the temperature sense emitter set to be integrally formed, the current temperature induction hair
Emitter is installed in the cavity or in housing outer surface.
Further, the temperature sense transmitter is equipped with PT100 temperature sensor.
Second aspect, the present invention also provides a kind of guard method of compressor, the guard method of the compressor is using the
Protective device described in one side, comprising the following steps: S1: acquisition electric current and temperature signal are concurrently incident upon control panel；S2: control
The temperature and current signal that receive are analyzed in making sheet, issue on/off instruction.S3: motor is instructed according to on/off, and starting/
Stop motor operating.
Further, control panel is as follows to the analytical procedure of temperature and current signal in the step S2: S201: according to pressure
The maximum electric current that bears of compressor is set as Ia by the nominal parameter of contracting machine, and maximum bearing temperature is set as Ta；S202: control panel connects
When the current signal I >=Ia or/and temperature signal T >=Ta that receive, control panel issues cutting instruction；S203: control panel receives
When the current signal I < Ia and temperature signal T < Ta that arrive, control panel sending goes code.
Further, the size of the maximum receiving electric current Ia of the compressor and maximum bearing temperature Ta can be according to differences
Demand and adjust.
The third aspect: the present invention also provides a kind of compressor, the compressor includes protective device described in first aspect.
The beneficial effects of the present invention are: protective device, method and the compressor of a kind of compressor provided by the invention, the guarantor
Electric current and temperature data are sent to control by way of wireless transmission by the electric current and temperature of induction compressor by protection unit
Plate, control panel provide on/off signal according to electric current and temperature data, analysis, and on/off power supply avoids direct wiring and leads
The high current and high-voltage impact protective device of cause greatly improve the service life of protector, and improve the precision of protective device and lead to
The property used.
Detailed description of the invention
Invention is described further using attached drawing, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention,
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to the following drawings
Its attached drawing.
Fig. 1 is the structural schematic diagram of the protective device of the compressor of one embodiment of the invention.
Fig. 2 is the structural schematic diagram of the protective device of the compressor of second embodiment of the invention.
Fig. 3 is the structural schematic diagram of the protective device of the compressor of third embodiment of the invention.
Fig. 4 is the flow diagram for the guard method that protective device through the invention is implemented.
Fig. 5 is the flow diagram of the control plate analysis data for the guard method that protective device through the invention is implemented.
Wherein, appended drawing reference is as follows: 1. shells, 2. seal chambers, 3. motors, 4 conductor wires, 5. current temperature induced emissions
Device, 501. electric current inductive transmitters, 502. temperature sense transmitters, 6 induction coils.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
Embodiment 1.
As shown in Figure 1, Figure 4 and Figure 5, the protective device of a kind of compressor of the present embodiment, including compressor, the compression
Machine includes the seal chamber 2 that shell 1, conductor wire 4, motor 3, control panel and the shell 1 are formed, and the motor 3 is led by described
Electric wire 4 connects power supply, the control panel and the motor 3 and is electrically connected by the conductor wire 4, and protective device further includes 1 electricity
Inductive transmitter, 1 temperature sense transmitter are flowed, the electric current inductive transmitter and the temperature sense transmitter are integrated in one
It rises and forms a current temperature inductive transmitter 5, current temperature inductive transmitter 5 is mounted on the motor 3 in the seal chamber 2
Wireless transmitter module, current temperature induction hair are equipped on face, the electric current inductive transmitter and the temperature sense transmitter
Temperature sense transmitter in emitter 5 is equipped with temperature sensor PT100, and the current temperature inductive transmitter 5 is connected with induction
Coil 6, the induction coil 6 are wrapped on the conductor wire 4, and the control panel is equipped with data sink, and the data connect
Receive the data that device can receive the electric current inductive transmitter and the temperature sense transmitter is issued by wireless transmitter module
Information.
Current temperature inductive transmitter 5 is mounted on the motor in closing chamber 2 by the present embodiment, keeps compressor whole more beautiful
It sees, is cleaner and tidier, by the available electric current to compressor of the induction coil 6 being wrapped on conductor wire 4, and passing through current temperature
Current information is sent to control panel by the electric current inductive transmitter of inductive transmitter 5, passes through the temperature of current temperature inductive transmitter 5
The temperature for spending the available compressor of temperature sensor PT100 in inductive transmitter, passes through current temperature inductive transmitter 5
Temperature information is sent to control panel by temperature sense transmitter, and control panel can be issued according to the electric current and temperature information received
The instruction of on/off compressor, transmits electric current and temperature information by way of wireless transmission, can effectively avoid protecting
Impact of the device by high current high voltage.
The implementation method of the present embodiment is as follows: S1: current temperature inductive transmitter 5 acquires the electric current and temperature letter of compressor
Number, concurrently it is incident upon control panel；S2: control panel analyzes the temperature and current signal that receive, issues on/off instruction.S3:
Motor is instructed according to on/off, starting/stopping motor operating；Wherein, analysis of the control panel to temperature and current signal in step S2
Steps are as follows: S201: the maximum electric current that bears of compressor being set as Ia according to the nominal parameter of compressor, maximum bearing temperature is set
For Ta；S202: when current signal I >=Ia or/and temperature signal T >=Ta that control panel receives, control panel issues cutting and refers to
It enables；S203: when current signal I < Ia and temperature signal T < Ta that control panel receives, control panel sending goes code；Institute
The size for stating the maximum receiving electric current Ia and maximum bearing temperature Ta of compressor can be according to requiring to be arranged, to adapt to different compressions
The requirement of machine.
A kind of compressor of the present embodiment includes the protective device of the compressor of the present embodiment, by incuding compressor
Electric current and temperature, for control panel according to electric current and temperature data, analysis provides on/off signal, is connected/cuts off the power, avoids protecting
Device is protected directly by high current and high-voltage impact, greatly improves the service life of protector, and be arranged according to different model compressor
The maximum of corresponding compressor bears electric current Ia and maximum bearing temperature Ta, improves the precision and versatility of protective device.
Embodiment 2.
As shown in Fig. 2, Fig. 4 and Fig. 5, a kind of protective device of compressor of the present embodiment, including compressor, the compression
Machine includes the seal chamber 2 that shell 1, conductor wire 4, motor 3, control panel and the shell 1 are formed, and the motor 3 is led by described
Electric wire 4 connects power supply, the control panel and the motor 3 and is electrically connected by the conductor wire 4, and protective device further includes 1 electricity
501,1 temperature sense transmitters 502 of inductive transmitter are flowed, the electric current inductive transmitter 501 is mounted on the outer of the shell 1
On surface, the temperature sense transmitter 502 is mounted on the motor 3 in seal chamber, the electric current inductive transmitter 501 and institute
It states and is equipped with wireless transmitter module on temperature sense transmitter 502, temperature sense transmitter 502 is equipped with temperature sensor
PT100, the electric current inductive transmitter 501 are connected with induction coil 6, and the induction coil 6 is wrapped on the conductor wire 4,
The control panel is equipped with data sink, and the data sink can receive the electric current inductive transmitter and the temperature
The data information that inductive transmitter is issued by wireless transmitter module.
Electric current inductive transmitter 501 and temperature sense transmitter 502 are installed separately by the present embodiment, avoid signal interference,
By the available electric current to compressor of the induction coil 6 being wrapped on conductor wire 4, and pass through electric current inductive transmitter 501
Current information is sent to control panel, passes through the available compressor of temperature sensor PT100 on temperature sense transmitter 502
Temperature, temperature information is sent to by control panel by temperature sense transmitter 501, control panel can be according to the electric current received
The instruction that on/off compressor is issued with temperature information, transmits electric current and temperature information by way of wireless transmission, can be with
Effectively avoid protective device by the impact of high current high voltage.
The implementation method of the present embodiment is as follows: S1: electric current inductive transmitter 501 and the acquisition pressure of temperature sense transmitter 502
The electric current and temperature signal of contracting machine, are concurrently incident upon control panel；S2: control panel divides the temperature and current signal that receive
Analysis issues on/off instruction.S3: motor is instructed according to on/off, starting/stopping motor operating；Wherein, control panel pair in step S2
Temperature and the analytical procedure of current signal are as follows: S201: the maximum of compressor being born electric current according to the nominal parameter of compressor
It is set as Ia, maximum bearing temperature is set as Ta；S202: the current signal I >=Ia or/and temperature signal T that control panel receives >=
When Ta, control panel issues cutting instruction；S203: when current signal I < Ia and temperature signal T < Ta that control panel receives,
Control panel sending goes code；Wherein, the maximum size for bearing electric current Ia and maximum bearing temperature Ta of the compressor can be with
According to requiring to be arranged, to adapt to the requirement of different compressors.
A kind of compressor of the present embodiment includes the protective device of the compressor of the present embodiment, by incuding compressor
Electric current and temperature, for control panel according to electric current and temperature data, analysis provides on/off signal, is connected/cuts off the power, avoids protecting
Device is protected directly by high current and high-voltage impact, greatly improves the service life of protector, and be arranged according to different model compressor
The maximum of corresponding compressor bears electric current Ia and maximum bearing temperature Ta, improves the precision and versatility of protective device.
Embodiment 3.
As shown in Fig. 3, Fig. 4 and Fig. 5, a kind of protective device of compressor of the present embodiment, including compressor, the compression
Machine includes the seal chamber 2 that shell 1, conductor wire 4, motor 3, control panel and the shell 1 are formed, and the motor 3 is led by described
Electric wire 4 connects power supply, the control panel and the motor 3 and is electrically connected by the conductor wire 4, and protective device further includes 3 electricity
Inductive transmitter, 1 temperature sense transmitter are flowed, the electric current inductive transmitter and the temperature sense transmitter are integrated in one
It rises and forms a current temperature inductive transmitter 5, current temperature inductive transmitter 5 is mounted in the shell 1 in the seal chamber 2
On surface, wireless transmitter module, current temperature sense are equipped on the electric current inductive transmitter and the temperature sense transmitter
The temperature sense transmitter on transmitter 5 is answered to be equipped with temperature sensor PT100, the current temperature inductive transmitter 5 is connected with 3
Group induction coil 6,6 each groups of the induction coil are respectively wound around on any different conductor wire 4 for having electric current to pass through,
The control panel is equipped with data sink, and the data sink can receive the electric current inductive transmitter and the temperature
The data information that inductive transmitter is issued by wireless transmitter module.
The present embodiment is equipped with three induction coils 6 and three corresponding electric current inductive transmitters, three induction coils
It can wind on the conductor wire 4 for arbitrarily thering is electric current to pass through, can more accurately obtain the current information of compressor, pass through winding
The available electric current to compressor of induction coil 6 on conductor wire 4, and pass through the electric current of current temperature inductive transmitter 5
Current information is sent to control panel by inductive transmitter, by the temperature sense transmitter of current temperature inductive transmitter 5
The temperature of the available compressor of temperature sensor PT100, will by the temperature sense transmitter of current temperature inductive transmitter 5
Temperature information is sent to control panel, and control panel can issue on/off compressor according to the electric current and temperature information received
Instruction, electric current and temperature information are transmitted by way of wireless transmission, effectively protective device can be avoided by high current
The impact of high voltage.
The implementation method of the present embodiment is as follows: S1: current temperature inductive transmitter 5 acquires the electric current and temperature letter of compressor
Number, concurrently it is incident upon control panel；S2: control panel analyzes the temperature and current signal that receive, issues on/off instruction.S3:
Motor is instructed according to on/off, starting/stopping motor operating；Wherein, analysis of the control panel to temperature and current signal in step S2
Steps are as follows: S201: the maximum electric current that bears of compressor being set as Ia according to the nominal parameter of compressor, maximum bearing temperature is set
For Ta；S202: when current signal I >=Ia or/and temperature signal T >=Ta that control panel receives, control panel issues cutting and refers to
It enables；S203: when current signal I < Ia and temperature signal T < Ta that control panel receives, control panel sending goes code；Its
In, the size of the maximum receiving electric current Ia of the compressor and maximum bearing temperature Ta can be according to requiring to be arranged, to adapt to not
With the requirement of compressor.
A kind of compressor of the present embodiment includes the protective device of the compressor of the present embodiment, by incuding compressor
Electric current and temperature, for control panel according to electric current and temperature data, analysis provides on/off signal, is connected/cuts off the power, avoids protecting
Device is protected directly by high current and high-voltage impact, greatly improves the service life of protector, and be arranged according to different model compressor
The maximum of corresponding compressor bears electric current Ia and maximum bearing temperature Ta, improves the precision and versatility of protective device.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected
The limitation of range is protected, although explaining in detail referring to preferred embodiment to the present invention, those skilled in the art are answered
Work as understanding, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the reality of technical solution of the present invention
Matter and range.
Claims (10)
1. a kind of protective device of compressor, is set on compressor, the compressor includes shell, conductor wire, motor, control
The seal chamber that plate and the shell are formed, the motor connect power supply, the control panel and the motor by the conductor wire
It is electrically connected by the conductor wire, which is characterized in that the protective device includes at least one electric current inductive transmitter, at least one
Temperature sense transmitter, the electric current inductive transmitter and the temperature sense transmitter can be installed in the seal chamber
Or on the outer surface of the shell, wireless transmission mould is equipped on the electric current inductive transmitter and the temperature sense transmitter
Block, the electric current inductive transmitter are connected with induction coil, and the induction coil is wrapped on the conductor wire, the control panel
It is equipped with data sink.
2. a kind of protective device of compressor as described in claim 1, which is characterized in that the electric current inductive transmitter quantity
Be 1, the temperature sense transmitter quantity is 1, the electric current inductive transmitter and the temperature sense emitter set at
The current temperature inductive transmitter being integrated.
3. a kind of protective device of compressor as claimed in claim 2, which is characterized in that the current temperature inductive transmitter
It is mounted in the seal chamber or on the outer surface of the shell.
4. a kind of protective device of compressor as described in claim 1, which is characterized in that the electric current inductive transmitter quantity
It is 1, the temperature sense transmitter quantity is 1, the electric current inductive transmitter and/or temperature sense transmitter peace
Mounted in being installed in the seal chamber and/or on the outer surface of the shell.
5. a kind of protective device of compressor as described in claim 1, which is characterized in that the electric current inductive transmitter quantity
It is 3, the temperature sense transmitter quantity is 1, and the induction coil of the electric current inductive transmitter connection is respectively wound around
On any 3 conductor wires for having electric current to pass through, the electric current inductive transmitter and the temperature sense emitter set are integrally formed
Current temperature inductive transmitter, current temperature inductive transmitter installation is in the cavity or in housing outer surface.
6. a kind of protective device of compressor as described in claim 1, which is characterized in that set on the temperature sense transmitter
There is PT100 temperature sensor.
7. a kind of guard method of compressor, which is characterized in that the guard method of the compressor is any using claim 1-6
Protective device described in one, comprising the following steps:
S1: acquisition electric current and temperature signal are concurrently incident upon control panel；
S2: control panel analyzes the temperature and current signal that receive, issues on/off instruction；
S3: motor is instructed according to on/off, starting/stopping motor operating.
8. a kind of guard method of compressor as claimed in claim 7, which is characterized in that control panel is to temperature in the step S2
The analytical procedure of degree and current signal is as follows:
S201: the maximum electric current that bears of compressor is set as by Ia according to the nominal parameter of compressor, maximum bearing temperature is set as Ta；
S202: when current signal I >=Ia or/and temperature signal T >=Ta that control panel receives, control panel issues cutting and refers to
It enables；
S203: when current signal I < Ia and temperature signal T < Ta that control panel receives, control panel sending goes code.
9. a kind of guard method of compressor as claimed in claim 8, which is characterized in that the maximum of the compressor bears electricity
The size of stream Ia and maximum bearing temperature Ta can adjust according to different needs.
10. a kind of compressor, which is characterized in that the compressor includes protective device as claimed in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910764601.2A CN110529371A (en) | 2019-08-19 | 2019-08-19 | A kind of protective device of compressor, method and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910764601.2A CN110529371A (en) | 2019-08-19 | 2019-08-19 | A kind of protective device of compressor, method and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110529371A true CN110529371A (en) | 2019-12-03 |
Family
ID=68663882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910764601.2A Pending CN110529371A (en) | 2019-08-19 | 2019-08-19 | A kind of protective device of compressor, method and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110529371A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1830131A (en) * | 2003-12-30 | 2006-09-06 | 科普兰公司 | Compressor protection and diagnostic system |
| CN103036205A (en) * | 2011-09-29 | 2013-04-10 | 上海日立电器有限公司 | Electronic protector for compressor |
| CN203054073U (en) * | 2012-12-09 | 2013-07-10 | 国家电网公司 | Current digital monitor for box-type substation three-phase low-voltage control cabinet |
| CN103807982A (en) * | 2012-11-07 | 2014-05-21 | 珠海格力电器股份有限公司 | Air conditioner |
| CN207049027U (en) * | 2017-07-03 | 2018-02-27 | 浙江诚信医化设备有限公司 | A kind of continuous runnability supervising device of immersible pump |
| CN211314518U (en) * | 2019-08-19 | 2020-08-21 | 珠海凌达压缩机有限公司 | Protection device of compressor and compressor |
-
2019
- 2019-08-19 CN CN201910764601.2A patent/CN110529371A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1830131A (en) * | 2003-12-30 | 2006-09-06 | 科普兰公司 | Compressor protection and diagnostic system |
| CN103036205A (en) * | 2011-09-29 | 2013-04-10 | 上海日立电器有限公司 | Electronic protector for compressor |
| CN103807982A (en) * | 2012-11-07 | 2014-05-21 | 珠海格力电器股份有限公司 | Air conditioner |
| CN203054073U (en) * | 2012-12-09 | 2013-07-10 | 国家电网公司 | Current digital monitor for box-type substation three-phase low-voltage control cabinet |
| CN207049027U (en) * | 2017-07-03 | 2018-02-27 | 浙江诚信医化设备有限公司 | A kind of continuous runnability supervising device of immersible pump |
| CN211314518U (en) * | 2019-08-19 | 2020-08-21 | 珠海凌达压缩机有限公司 | Protection device of compressor and compressor |
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