CN209655517U - A kind of frequency-variable controller and air-conditioning - Google Patents
A kind of frequency-variable controller and air-conditioning Download PDFInfo
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- CN209655517U CN209655517U CN201920220618.7U CN201920220618U CN209655517U CN 209655517 U CN209655517 U CN 209655517U CN 201920220618 U CN201920220618 U CN 201920220618U CN 209655517 U CN209655517 U CN 209655517U
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Abstract
The utility model provides a kind of frequency-variable controller and air-conditioning, and the frequency-variable controller can have there are three types of interface function, and respectively optical coupler isolating type TTL communicates mode of speed regulation, variable resistance mode of speed regulation and adjusting velocity by voltage mode.Host controller can select any of them mode to variable-frequency electric drive module setting revolving speed as needed, carry out rotational speed regulation.The interface circuit of frequency conversion drive module has automatic function selecting, and optical coupler isolating type TTL communicates mode of speed regulation highest priority, and adjusting velocity by voltage mode is secondly, variable resistance mode of speed regulation is minimum.Three-in-one speed-regulating function can be used in the frequency conversion drive module of the utility model, and interface function type is more, adaptable.Interface mode can be judged automatically, using simplicity, reduces the similar of drive module, a tractor serves several purposes reduces cost.
Description
Technical field
The utility model belongs to frequency-variable controller field.In particular to a kind of frequency-variable controller and air-conditioning.
Background technique
With the continuous improvement of living standards, air-conditioning has become one of essential electric appliance in people's Working Life,
Convertible frequency air-conditioner is that a frequency-variable controller is increased in the structure of conventional air-conditioning.Compressor is the heart of air-conditioning, and revolving speed is straight
The service efficiency for influencing air-conditioning is connect, frequency-variable controller is exactly the control system for controlling and adjusting compressor rotary speed, is allowed to
Always optimal rotary regimes are in, to improve Energy Efficiency Ratio.The basic structure and refrigeration principle and common air-conditioning of convertible frequency air-conditioner
It is identical.The host of convertible frequency air-conditioner is automatic progress variable speed, it can automatically provide required according to room availability
Cold (heat) amount；After room temperature reaches desired value, air-conditioner host is then can accurately keep the constant speed of this temperature to transport
Turn, realizes " not shutting down operating ", to guarantee the stabilization of environment temperature.
The frequency-variable controller of existing household and cabinet air conditioner mostly uses communication modes to be adjusted the speed, interface function list
One, control adaptability is not strong.It needs to cope with using a plurality of frequency conversion drive modules when coping with different air-conditioning systems, flexibility ratio is not
It is high.
It is, therefore, desirable to provide it is a kind of can a tractor serves several purposes frequency-variable controller.
Utility model content
The utility model proposes a kind of frequency-variable controller and air-conditionings, single to solve interface function in the prior art, control
The problems such as adaptability processed is not strong, copes with different air-conditioning systems and needs to cope with using a plurality of frequency conversion drive modules, and flexibility ratio is not high.
In order to solve the above-mentioned technical problem, the first aspect of the utility model proposes a kind of frequency-variable controller, including frequency conversion
Drive module and interface；
The frequency conversion drive module includes the driving unit for being adjusted the speed to compressor of multiple and different types, described
Interface includes the interface unit of multiple and different types；
The output end of each interface unit is connect with the driving unit of a corresponding types, according to the tune of setting
Fast mode accesses a host controller in the input terminal of a corresponding interface unit and is used for the frequency conversion drive module
Carry out rotational speed regulation.
Optionally, the frequency conversion drive module further includes for cooperating with the driving unit to carry out to the compressor
The speed adjustment unit of speed regulation, the speed adjustment unit and the driving unit and the compressor communicate to connect, the speed adjustment unit
The compressor operating is controlled with corresponding mode of speed regulation according to the type of the driving unit.
Optionally, the speed adjustment unit includes multiple speed regulation subelements, and each different types of driving unit is corresponding
There are the speed regulation subelement of respective type, the driving unit communication connection of the speed regulation subelement and corresponding types, and is used for
Cooperation controls the compressor operating with corresponding mode of speed regulation.
Optionally, the mode of speed regulation includes optical coupler isolating type TTL communication mode of speed regulation, and the frequency conversion drive module includes
First driving unit, the interface include first interface unit, the output end of the first interface unit and first driving
Unit connection, the input terminal of the first interface unit with the host controller for connecting；
When using optical coupler isolating type TTL communication mode of speed regulation, the host controller and the first interface unit
Input terminal connection, to start optical coupler isolating type TTL communication mode of speed regulation.
Optionally, the mode of speed regulation includes adjusting velocity by voltage mode, and the frequency conversion drive module includes the second driving unit,
The interface includes second interface unit, and the output end of the second interface unit is connect with second driving unit, described
The input terminal of second interface unit with the host controller for connecting；
When using the adjusting velocity by voltage mode, the host controller is connect with the input terminal of the second interface unit,
To start the adjusting velocity by voltage mode.
Optionally, the mode of speed regulation includes variable resistance mode of speed regulation, and the frequency conversion drive module includes the second driving
Unit, the interface include second interface unit, and the output end of the second interface unit is connect with second driving unit,
The input terminal of the second interface unit with the host controller for connecting；
When using the variable resistance mode of speed regulation, the host controller and the input terminal of the second interface unit connect
It connects, to start the variable resistance mode of speed regulation.
Optionally, the mode of speed regulation further includes adjusting velocity by voltage mode, and the frequency conversion drive module includes that the second driving is single
Member, the interface include second interface unit, and the output end of the second interface unit is connect with second driving unit, institute
The input terminal of second interface unit is stated for connecting with the host controller；
When using the adjusting velocity by voltage mode, the host controller is connect with the input terminal of the second interface unit,
To start the adjusting velocity by voltage mode.
Optionally, the input terminal of the second interface unit includes the first input and the second input, first input
For being connect with the host controller；
When using the adjusting velocity by voltage mode, the host controller and first input are connected, thus described in starting
Adjusting velocity by voltage mode.
Optionally, the mode of speed regulation further includes variable resistance mode of speed regulation, it is described second input for it is described upper
Controller connection；
When using the variable resistance mode of speed regulation, the host controller and second input are connected, to start
The variable resistance mode of speed regulation.
Optionally, the mode of speed regulation includes adjusting velocity by voltage mode and variable resistance mode of speed regulation, the frequency conversion drive
Module includes the second driving unit, and the interface includes second interface unit, and the input terminal of the second interface unit includes the
One input and the second input；
When using the adjusting velocity by voltage mode, the host controller and first input are connected, thus described in starting
Adjusting velocity by voltage mode；
When using the variable resistance mode of speed regulation, the host controller control is connected with second input, thus
Start the variable resistance mode of speed regulation.
Optionally, the mode of speed regulation includes that optical coupler isolating type TTL communicates mode of speed regulation and variable resistance mode of speed regulation,
The frequency conversion drive module include the first driving unit and the second driving unit, the interface include first interface unit and
Second interface unit；
The output end of the first interface unit is connect with first driving unit, the output of the second interface unit
End is connect with second driving unit；
When using the variable resistance mode of speed regulation, the host controller is connect with the second interface unit, thus
Start the variable resistance mode of speed regulation；
When using optical coupler isolating type TTL communication mode of speed regulation, the host controller and the first interface unit
Input terminal connection, to start optical coupler isolating type TTL communication mode of speed regulation.
The second aspect of the utility model provides a kind of air-conditioning, including a kind of frequency control any in features described above
Device.
The utility model provides a kind of frequency-variable controller and air-conditioning, and the frequency-variable controller can have that there are three types of interface function
Can, respectively optical coupler isolating type TTL communicates mode of speed regulation, variable resistance mode of speed regulation and adjusting velocity by voltage mode.Upper control
Device can select any of them mode to variable-frequency electric drive module setting revolving speed as needed, carry out rotational speed regulation.Frequency conversion is driven
The interface circuit of dynamic model block has automatic function selecting, and optical coupler isolating type TTL communicates mode of speed regulation highest priority, adjusting velocity by voltage
Mode is secondly, variable resistance mode of speed regulation is minimum.Three-in-one speed-regulating function can be used in the frequency conversion drive module of the utility model, connects
Mouth function type is more, adaptable.Interface mode can be judged automatically, using simplicity, reduces the similar of drive module, a machine is more
With reducing cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that a kind of optical coupler isolating type TTL provided by the embodiment of the utility model communicates mode of speed regulation；
Fig. 2 is a kind of structural schematic diagram of adjusting velocity by voltage mode provided by the embodiment of the utility model；
Fig. 3 is a kind of structural schematic diagram of variable resistance mode of speed regulation provided by the embodiment of the utility model；
Fig. 4 is a kind of structural schematic diagram of frequency-variable controller provided by the embodiment of the utility model；
10- host controller, 20- interface, 30- frequency conversion drive module, 301- first adjust the speed subelement, and the second son of 302- is single
Member, 303- third subelement.
Specific embodiment
Below in conjunction with the drawings and specific embodiments to the utility model proposes a kind of frequency-variable controller make further it is detailed
Explanation.According to following explanation and claims, will be become apparent from feature the advantages of the utility model.It should be noted that attached drawing
It is all made of very simplified form and uses non-accurate ratio, only to facilitate, lucidly aid in illustrating the utility model
The purpose of embodiment.
In the description of the present invention, it should be understood that term " center ", "upper", "lower", "left", "right" etc. refer to
The orientation or positional relationship shown is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model
It is described with simplifying, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation structure
It makes and operates, therefore should not be understood as limiting the present invention.
In addition, in the description of the present invention, the meaning of " plurality " is at least two, such as two, three etc., unless
Separately there is clearly specific restriction.
The utility model provides a kind of frequency-variable controller, including frequency conversion drive module 30 and interface 20.The frequency conversion is driven
The driving unit for being adjusted the speed to compressor of dynamic model block 30 including multiple and different types, the interface 20 including it is multiple not
The interface unit of same type.The output end of each interface unit is connect with the driving unit of a corresponding types, root
A host controller 10 is accessed in the input terminal of a corresponding interface unit according to the mode of speed regulation of setting to be used for described
Frequency conversion drive module carries out rotational speed regulation.
As shown in Figures 1 to 4, the present embodiment provides a kind of frequency-variable controller, the output end of each interface unit with
The driving unit connection of one corresponding types, the host controller 10 can be as desired by the suitable interfaces 20 of selection
To select the mode of speed regulation of the frequency conversion drive module 30.
It should be noted that mode of speed regulation described here can there are many, and an interface unit can match it is a variety of
Mode of speed regulation.So that a driving unit can correspond to a variety of modes of speed regulation, i.e. frequency conversion drive module 30 a can be mostly used, with
Reduce cost.In addition, the quantity of the interface 20 can be multiple, as shown in Figure 1 to Figure 3, interface 20 described in the present embodiment
Quantity is set as two, but is not limited to two, may be arranged as 3 it is even more, can with only one, certainly,
More interfaces mean that more complicated structure and higher cost, need to be selected according to specific actual needs, herein
With no restrictions.
Optionally, the mode of speed regulation may include optical coupler isolating type TTL communication mode of speed regulation, as shown in Figure 1, the frequency conversion
Drive module 30 includes the first driving unit, and the interface 20 includes first interface unit, the output of the first interface unit
End is connect with first driving unit, and the input terminal of the first interface unit with the host controller for connecting.
When using optical coupler isolating type TTL communication mode of speed regulation, the host controller 10 and the first interface list
The input terminal connection of member, to start the optical coupler isolating type TTL communication mode of speed regulation.
Optionally, the mode of speed regulation may also include adjusting velocity by voltage mode, as shown in Fig. 2, the frequency conversion drive module 30
Including the second driving unit, the interface 20 includes second interface unit, the output end of the second interface unit and described the
The connection of two driving units, the input terminal of the second interface unit with the host controller for connecting.
When using the adjusting velocity by voltage mode, the host controller 10 and the input terminal of the second interface unit connect
It connects, to start the adjusting velocity by voltage mode.It should be noted that in addition to the 0-5V adjusting velocity by voltage mode mentioned in the present embodiment
Outside, adjusting velocity by voltage can also be the voltage of other voltage ranges, herein with no restrictions.
Further, the input terminal of the second interface unit includes the first input and the second input, and described first is defeated
Enter for being connect with the host controller.When using the adjusting velocity by voltage mode, the host controller 10 and described first
Input connection, to start the adjusting velocity by voltage mode.
Further, the mode of speed regulation further includes variable resistance mode of speed regulation, as shown in figure 3, second input is used
It is connect in the host controller.When using the variable resistance mode of speed regulation, the host controller 10 and described second
Input connection, to start the variable resistance mode of speed regulation.It should be noted that the variable resistance tune provided in the present embodiment
Fast mode is 0-22k ohm of variable resistance mode of speed regulation, be provided in host controller 10 corresponding 0-22k ohm can
Power transformation resistance, is correspondingly connected with the 1 and 2 of interface 20, frequency conversion drive module 30 corresponding with the interface 20 is adjusted the speed using variable resistance
Mode, it should be noted that the interface 20 of interfaces described herein 20 and above-mentioned adjusting velocity by voltage mode can share the same interface
20, and frequency conversion drive module 30 described herein can also be shared with the frequency conversion drive module 30 in above-mentioned adjusting velocity by voltage mode.
In addition, the variable resistance range in the present embodiment is 0-22k ohm, the variable resistance of other ranges can also be, it can be according to tool
Body is actually needed to select, herein with no restrictions.
The mode of speed regulation can also include above-mentioned 3 kinds of modes of speed regulation simultaneously, and host controller can select as needed wherein
Any one mode carries out rotational speed regulation to variable-frequency electric drive module setting revolving speed.The interface circuit of frequency conversion drive module has
Automatic function selecting, optical coupler isolating type TTL communicate mode of speed regulation highest priority, and adjusting velocity by voltage mode is secondly, variable resistance tune
Fast mode is minimum.In addition, can also be any of above-mentioned 3 kinds of modes of speed regulation other than it can include simultaneously above-mentioned 3 kinds of modes of speed regulation
The mode of speed regulation of combination or other forms, it is numerous to list herein.
It should be noted that the frequency-variable controller can also only include any one in above-mentioned 3 kinds of modes of speed regulation, this
When, for host controller when accessing the interface of the frequency-variable controller, the frequency-variable controller can enter corresponding speed regulation
In mode, the judgement for carrying out priority again is not needed.For example, when the frequency-variable controller is logical using the optical coupler isolating type TTL
Mode of speed regulation is interrogated, the host controller is connect with the input terminal of the first interface unit, to start the light-coupled isolation
Formula TTL communicates mode of speed regulation.The case where other two kinds of modes of speed regulation, is similar with the above process.
Further, as shown in Figure 1 to Figure 3, the frequency conversion drive module may also include for matching with the driving unit
It closes the speed adjustment unit to be adjusted the speed to the compressor, the speed adjustment unit and the driving unit and the compressor is logical
Letter connection, the speed adjustment unit control the compressor operating according to the type of the driving unit with corresponding mode of speed regulation.
For example, the first driving unit in optical coupler isolating type TTL communication mode of speed regulation has been correspondingly connected with a speed adjustment unit, described first
Driving unit is matched with corresponding speed adjustment unit, controls the compressor operating with corresponding mode of speed regulation.
Optionally, the speed adjustment unit includes multiple speed regulation subelements, and each different types of driving unit is corresponding
There are the speed regulation subelement of respective type, the driving unit communication connection of the speed regulation subelement and corresponding types, and is used for
Cooperation controls the compressor operating with corresponding mode of speed regulation.In the present embodiment, the quantity of the speed regulation subelement is 3
A, the respectively first speed regulation subelement 301, the second speed regulation subelement 302 and third adjust the speed subelement 303, wherein work as selection
When the isolated TTL of coupling communicates mode of speed regulation, first driving unit is isolated with the first speed regulation cooperation of subelement 301 with coupling
Formula TTL communicates mode of speed regulation and controls the compressor operating；When selecting adjusting velocity by voltage mode, second driving unit and institute
It states the cooperation of the second speed regulation subelement 302 and controls the compressor operating in a manner of adjusting velocity by voltage；When selection variable resistance speed regulation side
When formula, second driving unit and the second speed regulation subelement 302 cooperation are with the variable resistance mode of speed regulation control pressure
The work of contracting machine.It should be noted that when selecting adjusting velocity by voltage mode or variable resistance mode of speed regulation, although being all described second
Driving unit cooperates control with speed regulation subelement, still, second driving unit and the second speed regulation subelement 302
And the third speed regulation subelement 303 is communicated to connect by two different interfaces.As shown in Figures 2 and 3, it is elected to
When selecting adjusting velocity by voltage mode, second driving unit can select corresponding interface to connect second speed adjustment unit 302, separately
One interface then stops working, and when selecting variable resistance mode of speed regulation, situation is similar therewith.
The present embodiment also provides a kind of air-conditioning, including the frequency-variable controller any in features described above.
In conclusion the utility model, which provides a kind of frequency-variable controller and air-conditioning, the frequency-variable controller, can have three
Kind interface function, respectively optical coupler isolating type TTL communicate mode of speed regulation, variable resistance mode of speed regulation and adjusting velocity by voltage mode.
Host controller can select any of them mode to variable-frequency electric drive module setting revolving speed as needed, carry out revolving speed tune
Section.The interface circuit of frequency conversion drive module has automatic function selecting, and optical coupler isolating type TTL communicates mode of speed regulation priority most
Height, adjusting velocity by voltage mode is secondly, variable resistance mode of speed regulation is minimum.The frequency conversion drive module of the utility model can be used three-in-one
Speed-regulating function, interface function type is more, adaptable.Interface mode can be judged automatically, using simplicity, reduces the class of drive module
Seemingly, a tractor serves several purposes reduces cost.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example " or " specifically show
It is practical that the description of example " etc. means that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained in
In at least one novel embodiment or example.In the present specification, schematic expression of the above terms are necessarily directed to
It is identical embodiment or example.And particular features, structures, materials, or characteristics described can be at any one or more
It can be combined in any suitable manner in a embodiment.In addition, those skilled in the art can will be described in this specification different real
It applies example or example is engaged and combined.
It should be noted last that above embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application, to the greatest extent
Pipe is described in detail the utility model referring to preferred embodiment, those skilled in the art should understand that, it can be with
The technical solution of the present invention is modified or equivalently replaced, without departing from technical solutions of the utility model spirit and
Range.
Claims (12)
1. a kind of frequency-variable controller, which is characterized in that including frequency conversion drive module and interface；
The frequency conversion drive module includes the driving unit for being adjusted the speed to compressor of multiple and different types, the interface
Interface unit including multiple and different types；
The output end of each interface unit is connect with the driving unit of a corresponding types, according to the speed regulation side of setting
Formula accesses a host controller in the input terminal of a corresponding interface unit and is used to carry out the frequency conversion drive module
Rotational speed regulation.
2. a kind of frequency-variable controller as described in claim 1, which is characterized in that the frequency conversion drive module further include for and
The speed adjustment unit that the driving unit cooperates to be adjusted the speed to the compressor, the speed adjustment unit and the driving unit with
And the compressor communication connection, the speed adjustment unit control institute according to the type of the driving unit with corresponding mode of speed regulation
State compressor operating.
3. a kind of frequency-variable controller as claimed in claim 2, which is characterized in that the speed adjustment unit includes that multiple speed regulation are single
Member, each different types of driving unit are corresponding with the speed regulation subelement of respective type, the speed regulation subelement with it is corresponding
The driving unit of type communicates to connect, and controls the compressor operating for cooperating with corresponding mode of speed regulation.
4. a kind of frequency-variable controller as described in claim 1, which is characterized in that the mode of speed regulation includes optical coupler isolating type
TTL communicates mode of speed regulation, and the frequency conversion drive module includes the first driving unit, and the interface includes first interface unit, institute
The output end for stating first interface unit is connect with first driving unit, and the input terminal of the first interface unit is used for and institute
State host controller connection；
When communicating mode of speed regulation using the optical coupler isolating type TTL, the host controller is defeated with the first interface unit
Enter end connection, to start the optical coupler isolating type TTL communication mode of speed regulation.
5. a kind of frequency-variable controller as described in claim 1, which is characterized in that the mode of speed regulation includes adjusting velocity by voltage side
Formula, the frequency conversion drive module include the second driving unit, and the interface includes second interface unit, the second interface unit
Output end connect with second driving unit, the input terminal of the second interface unit is used for and the host controller connects
It connects；
When using the adjusting velocity by voltage mode, the host controller is connect with the input terminal of the second interface unit, thus
Start the adjusting velocity by voltage mode.
6. a kind of frequency-variable controller as described in claim 1, which is characterized in that the mode of speed regulation includes variable resistance speed regulation
Mode, the frequency conversion drive module include the second driving unit, and the interface includes second interface unit, the second interface list
The output end of member is connect with second driving unit, and the input terminal of the second interface unit is used for and the host controller
Connection；
When using the variable resistance mode of speed regulation, the host controller is connect with the input terminal of the second interface unit,
To start the variable resistance mode of speed regulation.
7. a kind of frequency-variable controller as claimed in claim 4, which is characterized in that the mode of speed regulation further includes adjusting velocity by voltage side
Formula, the frequency conversion drive module include the second driving unit, and the interface includes second interface unit, the second interface unit
Output end connect with second driving unit, the input terminal of the second interface unit is used for and the host controller connects
It connects；
When using the adjusting velocity by voltage mode, the host controller is connect with the input terminal of the second interface unit, thus
Start the adjusting velocity by voltage mode.
8. a kind of frequency-variable controller as claimed in claim 7, which is characterized in that the input terminal of the second interface unit includes
First input and the second input, first input with the host controller for connecting；
When using the adjusting velocity by voltage mode, the host controller and first input are connected, to start the voltage
Mode of speed regulation.
9. a kind of frequency-variable controller as claimed in claim 8, which is characterized in that the mode of speed regulation further includes variable resistance tune
Fast mode, second input with the host controller for connecting；
When using the variable resistance mode of speed regulation, the host controller and second input are connected, thus described in starting
Variable resistance mode of speed regulation.
10. a kind of frequency-variable controller as described in claim 1, which is characterized in that the mode of speed regulation includes adjusting velocity by voltage side
Formula and variable resistance mode of speed regulation, the frequency conversion drive module include the second driving unit, and the interface includes second interface
Unit, the input terminal of the second interface unit include the first input and the second input；
When using the adjusting velocity by voltage mode, the host controller and first input are connected, to start the voltage
Mode of speed regulation；
When using the variable resistance mode of speed regulation, the host controller control is connected with second input, to start
The adjusting velocity by voltage mode.
11. a kind of frequency-variable controller as described in claim 1, which is characterized in that the mode of speed regulation includes optical coupler isolating type
TTL communicates mode of speed regulation and variable resistance mode of speed regulation, and the frequency conversion drive module includes the first driving unit and second
Driving unit, the interface include first interface unit and second interface unit；
The output end of the first interface unit is connect with first driving unit, the output end of the second interface unit with
The second driving unit connection；
When using the variable resistance mode of speed regulation, the host controller is connect with the second interface unit, to start
The variable resistance mode of speed regulation；
When communicating mode of speed regulation using the optical coupler isolating type TTL, the host controller is defeated with the first interface unit
Enter end connection, to start the optical coupler isolating type TTL communication mode of speed regulation.
12. a kind of air-conditioning, which is characterized in that including a kind of frequency-variable controller as described in any in claim 1 to 11.
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| CN201920220618.7U CN209655517U (en) | 2019-02-21 | 2019-02-21 | A kind of frequency-variable controller and air-conditioning |
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| CN201920220618.7U CN209655517U (en) | 2019-02-21 | 2019-02-21 | A kind of frequency-variable controller and air-conditioning |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113007965A (en) * | 2021-03-19 | 2021-06-22 | 合肥美菱物联科技有限公司 | Main control frequency conversion integrated plate compressor rotating speed rapid adjusting device and implementation method thereof |
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2019
- 2019-02-21 CN CN201920220618.7U patent/CN209655517U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113007965A (en) * | 2021-03-19 | 2021-06-22 | 合肥美菱物联科技有限公司 | Main control frequency conversion integrated plate compressor rotating speed rapid adjusting device and implementation method thereof |
| CN113007965B (en) * | 2021-03-19 | 2022-06-07 | 合肥美菱物联科技有限公司 | Main control frequency conversion integrated plate compressor rotating speed rapid adjusting device and implementation method thereof |
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