CN105864007A - Protection device for compressor control circuit and control method thereof - Google Patents
Protection device for compressor control circuit and control method thereof Download PDFInfo
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- CN105864007A CN105864007A CN201510033768.3A CN201510033768A CN105864007A CN 105864007 A CN105864007 A CN 105864007A CN 201510033768 A CN201510033768 A CN 201510033768A CN 105864007 A CN105864007 A CN 105864007A
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Abstract
The invention provides a protection device for a compressor control circuit. The protection device comprises a controllable switch, a current detection module and a control module. The controllable switch is connected into a power supply circuit of a compressor; the current detection module is used for detecting the work current of the compressor; and the control module is connected with the control end of the controllable switch and the current detection module, judges whether an undercurrent fault occurs to the compressor control circuit or not according to the work current of the compressor, and controls the controllable switch to be disconnected to enable the power supply circuit to stop supplying power to the compressor when the undercurrent fault occurs to the compressor control circuit. The protection device can conduct protection when the undercurrent fault occurs to the compressor control circuit, and compressor faults and potential safety hazards caused by burning of the protection device due to the continuous repeated actions of the protection device are avoided. The invention further provides a control method of the protection device for the compressor control circuit.
Description
Technical field
The present invention relates to Compressor Technology field, particularly to a kind of protection device for compressor control loop and
A kind of control method of the protection device for compressor control loop.
Background technology
At present, mainly detect whether compressor occurs overcurrent phenomenon by current transformer, and work as compressor
Or the control loop of compressor occurs needing during overcurrent to carry out overcurrent protection control.And compressor is had turned on,
But its loop current is abnormal the most too low or compressor has running voltage and do not carries out protection control without the situation of operating current,
This situation may cause compressor operating fault, also can there is protection device and cause because of perseveration protection device to burn
The potential safety hazard ruined.
Summary of the invention
The purpose of the present invention is intended at least solve one of above-mentioned technological deficiency.
To this end, it is an object of the present invention to propose a kind of protection device for compressor control loop, it is possible to
Protecting during undercurrent fault occurs in compressor control loop, prevents compressor operating fault, and it can be avoided that protection
The potential safety hazard that the protection device that device continues perseveration and causes burns.
Further object is that the control method proposing a kind of protection device for compressor control loop.
For reaching above-mentioned purpose, a kind of protection dress for compressor control loop that one aspect of the present invention embodiment proposes
Put, including: gate-controlled switch, described gate-controlled switch is connected in the current supply circuit of compressor；Current detection module, institute
State current detection module for detecting the operating current of described compressor；Control module, described control module with described can
The control end of control switch is connected with described current detection module, and described control module is according to the operating current of described compressor
Judge whether described compressor control loop undercurrent fault occurs, and described owing occurs in described compressor control loop
During current failure, described control module controls described gate-controlled switch and disconnects so that described current supply circuit stops to described compression
Machine is powered.
The protection device for compressor control loop according to embodiments of the present invention, control module is according to the work of compressor
Make electric current and judge whether compressor control loop undercurrent fault occurs, and undercurrent event occurs in compressor control loop
During barrier, control module controls gate-controlled switch and disconnects so that current supply circuit stops powering to compressor such that it is able in compression
Machine controls loop to be occurred, during undercurrent fault, compressor is carried out undercurrent protection, prevents compressor operating fault, and energy
The potential safety hazard that the protection device enough avoiding protecting device to continue perseveration and cause burns.
According to one embodiment of present invention, described control module judges the work electricity of described compressor every Preset Time
The lower limit that stream is the most interval less than predetermined current, and judging that the operating current of described compressor is less than described default electricity
When the number of times of the lower limit that stream is interval reaches preset times, described control module judges that institute occurs in described compressor control loop
State undercurrent fault.
According to one embodiment of present invention, described control module also judges whether the operating current of described compressor is more than
The upper limit that described predetermined current is interval, and judging that the operating current of described compressor is more than described predetermined current interval
During the upper limit, described control module judges that overcurrent fault occurs in described compressor control loop, and controls described controlled open
Close and disconnect so that described current supply circuit stops powering to described compressor.
According to one embodiment of present invention, the described protection device for compressor control loop also includes display,
Described display is connected with described control module, wherein, when described undercurrent fault occurs in described compressor control loop
Time, described display shows undercurrent failure code under the control of described control module；When described compressor control is returned
When described overcurrent fault occurs in road, described display shows overcurrent fault code under the control of described control module.
According to one embodiment of present invention, described gate-controlled switch is relay, one end of described relay breaker in middle with
The live wire of input AC electricity is connected, and the other end of described relay breaker in middle passes through overload protective device and described compressor phase
Even, one end of described relay coil drives power supply to be connected with relay, the other end of described relay coil and
Described control module is connected.
According to one embodiment of present invention, described current detection module includes: current transformer, described Current Mutual Inductance
The primary series of device is between the other end and described overload protective device of described relay breaker in middle；First resistance, described
First resistor coupled in parallel is in the secondary of described current transformer；First diode group, one end of described first diode group with
Secondary one end of described current transformer is connected；Second resistance, one end of described second resistance and described one or two pole
The other end of pipe group is connected；3rd resistance, one end of described 3rd resistance is connected with the other end of described second resistance,
The secondary other end of the other end of described 3rd resistance and described current transformer is connected ground connection afterwards；Second diode group,
One end with the other end of described second resistance and described 3rd resistance respectively, one end of described second diode group is connected,
The other end of described second diode group is connected with sampling power supply；First electrochemical capacitor, described first electrochemical capacitor is just
Extremely it is connected with one end of described 3rd resistance, another of the negative pole end of described first electrochemical capacitor and described 3rd resistance
End is connected；4th resistance, one end of described 4th resistance is connected with the positive terminal of described first electrochemical capacitor, and described
The other end of four resistance is connected with described control module；First electric capacity, one end of described first electric capacity and described 4th electricity
The other end of resistance is connected, and the other end of described first electric capacity is connected with the other end of described 3rd resistance.
For reaching above-mentioned purpose, a kind of protection for compressor control loop that another aspect of the present invention embodiment proposes
The control method of device, comprises the following steps: the operating current of detection compressor；Work electricity according to described compressor
Stream judges whether described compressor control loop undercurrent fault occurs；And if it is determined that described compressor control loop
Described undercurrent fault occurs, then controls gate-controlled switch in the current supply circuit of described compressor and disconnect so that described power supply
Loop stops powering to described compressor.
The control method of the protection device for compressor control loop according to embodiments of the present invention, first detects compression
The operating current of machine, and judge whether compressor control loop undercurrent fault occurs according to the operating current of compressor,
If it is determined that undercurrent fault occurs in compressor control loop, then control the gate-controlled switch in the current supply circuit of compressor and break
Open so that current supply circuit stops powering to compressor such that it is able to when undercurrent fault occurs in compressor control loop pair
Compressor carries out undercurrent protection, prevents owing to compressor control loop occurs that current anomaly causes compressor operating event
Barrier, and it can be avoided that the protection device protection potential safety hazard burnt of device that continues perseveration and cause.
According to one embodiment of present invention, it is judged that described undercurrent fault occurs in described compressor control loop, specifically
Including: judge every Preset Time whether the operating current of described compressor is less than the lower limit that predetermined current is interval；If
It is then to reach default at the operating current judging described compressor less than the number of times of the lower limit in described predetermined current interval
During number of times, it is judged that described undercurrent fault occurs in described compressor control loop.
According to one embodiment of present invention, the control method of the described protection device for compressor control loop is also
Including: judge the upper limit that the operating current of described compressor is the most interval more than described predetermined current；If it is determined that it is described
The upper limit that the operating current of compressor is interval more than described predetermined current, then judge that described compressor control loop occurred
Current failure, and control the disconnection of described gate-controlled switch so that described current supply circuit stops powering to described compressor.
According to one embodiment of present invention, the described protection device for compressor control loop also includes display,
Wherein, when described undercurrent fault occurs in described compressor control loop, control the display undercurrent event of described display
Barrier code；When described overcurrent fault occurs in described compressor control loop, control described display display overcurrent
Failure code.
Aspect and advantage that the present invention adds will part be given in the following description, and part will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or that add aspect and advantage will become bright from the following description of the accompanying drawings of embodiments
Aobvious and easy to understand, wherein:
Fig. 1 is the circuit block diagram of the protection device for compressor control loop according to the embodiment of the present invention；
Fig. 2 is the circuit block diagram of the protection device for compressor control loop according to one embodiment of the invention；With
And
Fig. 3 is the flow chart of the control method of the protection device for compressor control loop according to the embodiment of the present invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish
Same or similar label represents same or similar element or has the element of same or like function.Below by ginseng
The embodiment examining accompanying drawing description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
Following disclosure provides many different embodiments or example for realizing the different structure of the present invention.For letter
Changing disclosure of the invention, hereinafter parts and setting to specific examples are described.Certainly, they are the most merely illustrative,
And it is not intended to limit the present invention.Additionally, the present invention can in different examples repeat reference numerals and/or letter.
This repetition is for purposes of simplicity and clarity, between itself not indicating discussed various embodiment and/or arranging
Relation.Additionally, the various specific technique that the invention provides and the example of material, but ordinary skill people
Member is it can be appreciated that the property of can be applicable to of other techniques and/or the use of other materials.It addition, described below first is special
Levy second feature it " on " structure can include that the first and second features are formed as the embodiment directly contacted, it is possible to
To include the embodiment that other feature is formed between the first and second features, such first and second features may not
It it is directly contact.
In describing the invention, it should be noted that unless otherwise prescribed and limit, term " is installed ", " being connected ",
" connect " and should be interpreted broadly, for example, it may be mechanically connected or electrical connection, it is also possible to be the company of two element internals
Logical, can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, for those of ordinary skill in the art
Speech, can understand the concrete meaning of above-mentioned term as the case may be.
Describe with reference to the accompanying drawings the protection device for compressor control loop that proposes according to embodiments of the present invention with
And the control method of the protection device for compressor control loop.
Fig. 1 is the circuit block diagram of the protection device for compressor control loop according to the embodiment of the present invention.Such as Fig. 1
Shown in, this protection device being used for compressor control loop includes gate-controlled switch 10, current detection module 20 and controls
Module 30.
Wherein, gate-controlled switch 10 is connected in the current supply circuit of compressor M, and current detection module 20 is used for detecting pressure
The operating current of contracting machine M, control module 30 is connected with control end and the current detection module 20 of gate-controlled switch 10,
According to the operating current of compressor M, control module 30 judges whether compressor control loop undercurrent fault occurs, and
When undercurrent fault occurs in compressor control loop, control module 30 controls gate-controlled switch 10 and disconnects so that powering back
Road stops powering to compressor M.
According to one embodiment of present invention, control module 30 judges the operating current of compressor M every Preset Time
The lower limit the most interval less than predetermined current, and judging that the operating current of compressor M is less than predetermined current interval
When the number of times of lower limit reaches preset times, control module 30 judges that undercurrent fault occurs in compressor control loop.
Wherein, predetermined current is interval and preset times can be demarcated according to practical situation.
Additionally, according to one embodiment of present invention, whether control module 30 also judges the operating current of compressor M
More than the upper limit that predetermined current is interval, and when the operating current judging compressor M is more than the upper limit in predetermined current interval,
Control module 30 judges that overcurrent fault occurs in compressor control loop, and controls gate-controlled switch 10 and disconnect so that powering
Loop stops powering to compressor M.
According to one embodiment of present invention, as in figure 2 it is shown, the above-mentioned protection device for compressor control loop
Also include that display 40, display 40 are connected with control module 30, wherein, when compressor control loop occurs owing electricity
During stream fault, display 40 shows undercurrent failure code under the control of control module 30；When compressor control is returned
When overcurrent fault occurs in road, display 40 shows overcurrent fault code under the control of control module 30.
In an embodiment of the present invention, as in figure 2 it is shown, gate-controlled switch 10 can be relay R Y1, relay R Y1
One end of breaker in middle is connected with the live wire L of input AC electricity, and the other end of relay R Y1 breaker in middle passes through overload protection
Device OLP is connected with compressor M, and one end of relay R Y1 coil drives power supply VCC1 to be connected with relay,
The other end of relay R Y1 coil is connected with control module 30.
According to one embodiment of present invention, as in figure 2 it is shown, the above-mentioned protection device for compressor control loop
In current detection module 20 may include that Current Transmit the 1, first resistance R1, the first diode group D1,
Second resistance R2, the 3rd resistance R3, the second diode group D2, the first electrochemical capacitor EC1, the 4th resistance R4,
One electric capacity C1.Wherein, the primary series of Current Transmit 1 is in the other end of relay R Y1 breaker in middle and overload
Between protector OLP, the first resistance R1 is connected in parallel on the secondary of Current Transmit 1, the first diode group D1
One end is connected with secondary one end of Current Transmit 1, one end of the second resistance R2 and the first diode group D1
The other end is connected, and one end of the 3rd resistance R3 is connected with the other end of the second resistance R2, another of the 3rd resistance R3
Ground connection GND after holding the secondary other end with Current Transmit 1 to be connected, one end of the second diode group D2 is respectively
Be connected with the other end of the second resistance R2 and one end of the 3rd resistance R3, the other end of the second diode group D2 with adopt
Sample power supply VCC2 is connected, and the positive terminal of the first electrochemical capacitor EC1 and one end of the 3rd resistance R3 are connected, the first electricity
The other end of the negative pole end and the 3rd resistance R3 that solve electric capacity EC1 is connected, one end of the 4th resistance R4 and the first electrolysis electricity
The positive terminal holding EC1 is connected, and the other end of the 4th resistance R4 is connected with control module 30, the one of the first electric capacity C1
End is connected with the other end of the 4th resistance R4, and the other end of the first electric capacity C1 and the other end of the 3rd resistance R3 are connected.
Further, as shown in Figure 1 and Figure 2, between the zero line N of compressor M and input AC electricity, compression also it is in series with
Machine runs electric capacity C2, for the two-phase alternating current of input is converted to the three-phase alternating current needed for compressor M runs.
Specifically, as shown in Figure 1 and Figure 2, during compressor M runs, current detection module 20 detection pressure
The operating current of contracting machine M is also sent to control module 30, the work electricity of the control module 30 compressor M to detecting
Stream judges, if control module 30 judges that the operating current of compressor M is in predetermined current interval, then compresses
Machine M is properly functioning.
If control module 30 judges the upper limit that the operating current of compressor M is interval more than predetermined current, Current Mutual Inductance
Device CT1 senses that the operating current of compressor electric motor M sample circuit in current detection module 20 are by work
Current signal feeds back to control module 30, and control module 30 judges compressor by the requirements for overload current protection of software design patterns
Control whether loop overcurrent fault occurs, and when judging that overcurrent fault occurs in compressor control loop, produce phase
The control signal answered shows overcurrent fault code to control display 40, control simultaneously relay R Y1 disconnect so that
Current supply circuit stops powering to compressor M, and compressor M is carried out overcurrent protection.
Send control signal control compressor M to relay R Y1 when control module 30 to run, but Current Transmit 1
When sensing the lower limit that the operating current of compressor M is zero or interval less than the predetermined current that program is arranged, such as, as
Really the normal operating current interval of compressor M is 5～8A, then it is (pre-that the predetermined current interval that program is arranged is 2～12A
If electric current interval can need to be adjusted according to actual environment), when the operating current of compressor M is less than predetermined current
Interval lower limit such as 2A or when being zero, control module 30 requires to judge to compress by the undercurrent protection of software design patterns
Machine controls whether loop undercurrent fault occurs, and when judging that undercurrent fault occurs in compressor control loop, produces
Corresponding control signal shows overcurrent fault code controlling display 40, and as right in 5 minutes at regular intervals
The operating current of compressor M detects, by 3 detections it has been found that the operating current of compressor M is zero or is less than
The lower limit such as 2A that the predetermined current that program is arranged is interval, display 40 continues display undercurrent failure code, same to time control
Molding block 30 sends control signal control relay R Y1 and disconnects so that current supply circuit stops powering to compressor M, right
Compressor control loop is protected, it is to avoid compressor loop fault or compressor temperature controller burn because of lasting perseveration
Ruin.
In sum, the protection device for compressor control loop according to embodiments of the present invention, control module according to
The operating current of compressor judges whether compressor control loop undercurrent fault occurs, and goes out in compressor control loop
During existing undercurrent fault, control module controls gate-controlled switch and disconnects so that current supply circuit stops powering to compressor, thus
Compressor carries out when can there is undercurrent fault in compressor control loop undercurrent protection, and meanwhile, this protection fills
Put and can also occur in compressor control loop carrying out overcurrent protection during overcurrent fault, it is to avoid due to compressor control
Loop processed occurs that current anomaly causes compressor fault, and also it can be avoided that protection device continues perseveration and makes
The potential safety hazard that the protection device become burns.
Fig. 3 is the flow chart of the control method of the protection device for compressor control loop according to the embodiment of the present invention.
As it is shown on figure 3, the control method of this protection device being used for compressor control loop comprises the following steps:
S1, the operating current of detection compressor.
According to the operating current of compressor, S2, judges whether compressor control loop undercurrent fault occurs.
S3, if it is determined that there is undercurrent fault in compressor control loop, then control in the current supply circuit of compressor can
Control switches off so that current supply circuit stops powering to compressor.
Wherein, according to one embodiment of present invention, it is judged that undercurrent fault occurs in compressor control loop, specifically wraps
Include: judge every Preset Time whether the operating current of compressor is less than the lower limit that predetermined current is interval；If it is,
When the operating current judging compressor reaches preset times less than the number of times of the lower limit in predetermined current interval, it is judged that pressure
Contracting machine controls loop and undercurrent fault occurs.Wherein, predetermined current is interval and preset times can be entered according to practical situation
Rower is fixed.
According to one embodiment of present invention, the control method of the above-mentioned protection device for compressor control loop is also
Including: judge the upper limit that the operating current of compressor is the most interval more than predetermined current；If it is determined that the work of compressor
The upper limit that electric current is interval more than predetermined current, then judge that overcurrent fault occurs in compressor control loop, and control controlled
Switch off so that current supply circuit stops powering to compressor.
According to one embodiment of present invention, the protection device for compressor control loop also includes display, wherein,
When undercurrent fault occurs in compressor control loop, control display display undercurrent failure code；When compressor control
When overcurrent fault occurs in loop processed, control display display overcurrent fault code.
Specifically, during compressor operating, detect the operating current of compressor in real time and it judged,
If it is determined that the operating current of compressor is in predetermined current interval, then compressor is properly functioning；If it is determined that compressor
The operating current upper limit interval more than predetermined current, then judge that overcurrent fault occurs in compressor control loop, show
Device display overcurrent fault code, meanwhile, controls gate-controlled switch and disconnects so that current supply circuit stops powering to compressor；
If it is determined that the operating current of compressor is less than the interval lower limit of predetermined current or is zero, judge compressor control the most for the first time
There is undercurrent fault in loop processed, display display undercurrent failure code, and at regular intervals such as 5 minutes again
Whether the secondary operating current judging compressor is less than the interval lower limit of predetermined current or is zero, is so repeatedly detected 3～5
Secondary, if the interval lower limit of the operating current of the compressor detected respectively less than predetermined current or be zero every time, then show
Show that device, while display undercurrent failure code, controls gate-controlled switch and disconnects so that current supply circuit stops supplying to compressor
Electricity, it is to avoid compressor temperature controller burns because of perseveration.
Further, according to an example of the present invention, as in figure 2 it is shown, wherein gate-controlled switch can be relay.
When there is persistent overcurrent during compressor operating, Current Transmit 1 senses the work electricity of compressor electric motor
Operating current signal is also fed back to control module through over-sampling circuit by stream, the control module overcurrent by software design patterns
Protection requires to judge whether compressor control loop overcurrent fault occurs, and is judging that compressor control loop occurred
During current failure, produce corresponding control signal to control display and show overcurrent fault code, control relay simultaneously
Device RY1 disconnects so that current supply circuit stops powering to compressor, and compressor is carried out overcurrent protection.
Control compressor operating when control module sends control signal to relay R Y1, but Current Transmit 1 senses
When operating current to compressor is the lower limit of zero or interval less than the predetermined current that program is arranged, such as, if compressed
The normal operating current interval of machine is 5～8A, then the predetermined current interval that program is arranged is 2～12A (predetermined current intervals
Can need to be adjusted according to actual environment), when the operating current of compressor is less than the interval lower limit of predetermined current such as
2A or when being zero, control module requires to judge whether compressor control loop goes out by the undercurrent protection of software design patterns
Existing undercurrent fault, and when judging that undercurrent fault occurs in compressor control loop, produce corresponding control signal with
Control display display overcurrent fault code, and enter such as 5 minutes operating currents to compressor at regular intervals
Row detection, by 3 detections it has been found that the operating current of compressor is zero or interval less than the predetermined current that program is arranged
Lower limit such as 2A, display continue display undercurrent failure code, simultaneously control module send control signal control relay
Device RY1 disconnects so that current supply circuit stops powering to compressor, protects compressor control loop, it is to avoid compression
Machine loop fault or compressor temperature controller burn because of lasting perseveration.
The control method of the protection device for compressor control loop according to embodiments of the present invention, first detects compression
The operating current of machine, and judge whether compressor control loop undercurrent fault occurs according to the operating current of compressor,
If it is determined that undercurrent fault occurs in compressor control loop, then control the gate-controlled switch in the current supply circuit of compressor and break
Open so that current supply circuit stops powering to compressor such that it is able to when undercurrent fault occurs in compressor control loop pair
Compressor carries out undercurrent protection, can also occur in compressor control loop carrying out overcurrent during overcurrent fault simultaneously
Protection, prevents owing to compressor control loop occurs that current anomaly causes compressor fault, and also it can be avoided that protects
The potential safety hazard that the protection device protecting device to continue perseveration and to cause burns.
In flow chart or at this, any process described otherwise above or method description are construed as, and expression includes
One or more is for realizing the module of code of executable instruction of step of specific logical function or process, fragment
Or part, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not by shown or
The order discussed, including according to involved function by basic mode simultaneously or in the opposite order, performs function,
This should be understood by embodiments of the invention person of ordinary skill in the field.
Represent in flow charts or the logic described otherwise above at this and/or step, for example, it is possible to be considered as to use
In the sequencing list of the executable instruction realizing logic function, may be embodied in any computer-readable medium,
For instruction execution system, device or equipment (system such as computer based system, including processor or other can
With from instruction execution system, device or equipment instruction fetch the system performing instruction) use, or combine these instructions and hold
Row system, device or equipment and use.For the purpose of this specification, " computer-readable medium " can be any can comprise,
Store, communicate, propagate or transmission procedure for instruction execution system, device or equipment or combines these instructions and performs system
System, device or equipment and the device that uses.More specifically example (non-exhaustive list) bag of computer-readable medium
Include following: there is the electrical connection section (electronic installation) of one or more wiring, portable computer diskette box (magnetic device),
Random access memory (RAM), read only memory (ROM), erasable edit read only memory (EPROM
Or flash memory), fiber device, and portable optic disk read only memory (CDROM).It addition, computer
Computer-readable recording medium can even is that paper or other the suitable media that can print described program thereon, because can be the most logical
Cross and paper or other media are carried out optical scanning, then carry out editing, interpret or carrying out with other suitable methods if desired
Process and electronically obtain described program, be then stored in computer storage.
Should be appreciated that each several part of the present invention can realize by hardware, software, firmware or combinations thereof.Upper
Stating in embodiment, multiple steps or method in memory and can be performed by suitable instruction execution system with storage
Software or firmware realize.Such as, if realized with hardware, with the most the same, can use this
Any one or their combination in following technology known to field realize: have for data signal is realized logic
The discrete logic of the logic gates of function, has the special IC of suitable combination logic gate circuit, can
Programming gate array (PGA), field programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that and realize all or part of step that above-described embodiment method is carried
The program that can be by completes to instruct relevant hardware, and described program can be stored in a kind of computer-readable storage
In medium, this program upon execution, including one or a combination set of the step of embodiment of the method.
Additionally, each functional unit in each embodiment of the present invention can be integrated in a processing module, it is also possible to
It is that unit is individually physically present, it is also possible to two or more unit are integrated in a module.Above-mentioned integrated
Module both can realize to use the form of hardware, it would however also be possible to employ the form of software function module realizes.Described integrated
If module realize using the form of software function module and as independent production marketing or when using, it is also possible to storage
In a computer read/write memory medium.
Storage medium mentioned above can be read only memory, disk or CD etc..
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or
Person's feature is contained at least one embodiment or the example of the present invention.In this manual, the signal to above-mentioned term
Property statement be not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or
Feature can combine in any one or more embodiments or example in an appropriate manner.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, permissible
Understand these embodiments can be carried out without departing from the principles and spirit of the present invention multiple change, amendment,
Replacing and modification, the scope of the present invention is limited by claims and equivalent thereof.
Claims (10)
1. the protection device for compressor control loop, it is characterised in that including:
Gate-controlled switch, described gate-controlled switch is connected in the current supply circuit of compressor；
Current detection module, described current detection module is for detecting the operating current of described compressor；
Control module, described control module is connected with control end and the described current detection module of described gate-controlled switch, institute
State control module and judge whether described compressor control loop undercurrent event occurs according to the operating current of described compressor
Barrier, and when there is described undercurrent fault in described compressor control loop, described control module controls described controlled open
Close and disconnect so that described current supply circuit stops powering to described compressor.
2. the protection device for compressor control loop as claimed in claim 1, it is characterised in that described control
Every Preset Time, module judges that whether the operating current of described compressor is less than the lower limit that predetermined current is interval, and sentencing
When the number of times of the lower limit that the operating current described compressor that breaks is interval less than described predetermined current reaches preset times, institute
State control module and judge that described undercurrent fault occurs in described compressor control loop.
3. the protection device for compressor control loop as claimed in claim 2, it is characterised in that described control
Module also judges the upper limit that the operating current of described compressor is the most interval more than described predetermined current, and described in judgement
When the operating current of compressor is more than the upper limit that described predetermined current is interval, described control module judges described compressor control
There is overcurrent fault in loop processed, and controls the disconnection of described gate-controlled switch so that described current supply circuit stops to described compression
Machine is powered.
4. the protection device for compressor control loop as claimed in claim 3, it is characterised in that also include showing
Show that device, described display are connected with described control module, wherein,
When described undercurrent fault occurs in described compressor control loop, described display is in the control of described control module
The lower display undercurrent failure code of system；
When described overcurrent fault occurs in described compressor control loop, described display is in the control of described control module
The lower display overcurrent fault code of system.
5. the protection device for compressor control loop as according to any one of claim 1-4, it is characterised in that
Described gate-controlled switch is relay, and the live wire of one end of described relay breaker in middle and input AC electricity is connected, described in continue
The other end of electrical equipment breaker in middle is connected with described compressor by overload protective device, one end of described relay coil and
Relay drives power supply to be connected, and the other end of described relay coil is connected with described control module.
6. the protection device for compressor control loop as claimed in claim 5, it is characterised in that described electric current
Detection module includes:
Current transformer, the primary series of described current transformer is in the other end and the described mistake of described relay breaker in middle
Carry between protector；
First resistance, described first resistor coupled in parallel is in the secondary of described current transformer；
First diode group, one end of described first diode group is connected with secondary one end of described current transformer；
Second resistance, one end of described second resistance is connected with the other end of described first diode group；
3rd resistance, one end of described 3rd resistance is connected with the other end of described second resistance, described 3rd resistance
The secondary other end of the other end and described current transformer is connected ground connection afterwards；
Second diode group, one end of described second diode group respectively with the other end of described second resistance and described
One end of three resistance is connected, and the other end of described second diode group is connected with sampling power supply；
First electrochemical capacitor, the positive terminal of described first electrochemical capacitor is connected with one end of described 3rd resistance, and described
The negative pole end of one electrochemical capacitor is connected with the other end of described 3rd resistance；
4th resistance, one end of described 4th resistance is connected with the positive terminal of described first electrochemical capacitor, described 4th electricity
The other end of resistance is connected with described control module；
First electric capacity, one end of described first electric capacity is connected with the other end of described 4th resistance, described first electric capacity
The other end is connected with the other end of described 3rd resistance.
7. the control method for the protection device in compressor control loop, it is characterised in that comprise the following steps:
The operating current of detection compressor；
Operating current according to described compressor judges whether described compressor control loop undercurrent fault occurs；And
If it is determined that described undercurrent fault occurs in described compressor control loop, then the power supply controlling described compressor is returned
Gate-controlled switch in road disconnects so that described current supply circuit stops powering to described compressor.
8. the control method of the protection device for compressor control loop as claimed in claim 7, it is characterised in that
Judge that described undercurrent fault occurs in described compressor control loop, specifically include:
Judge every Preset Time whether the operating current of described compressor is less than the lower limit that predetermined current is interval；
If it is, judging the operating current number of times less than the lower limit in described predetermined current interval of described compressor
When reaching preset times, it is judged that described undercurrent fault occurs in described compressor control loop.
9. the control method of the protection device for compressor control loop as claimed in claim 8, it is characterised in that
Also include:
Judge the upper limit that the operating current of described compressor is the most interval more than described predetermined current；
If it is determined that the upper limit that the operating current of described compressor is interval more than described predetermined current, then judge described compression
Machine controls loop and overcurrent fault occurs, and controls the disconnection of described gate-controlled switch so that described current supply circuit stops to described
Compressor is powered.
10. the control method of the protection device for compressor control loop as claimed in claim 9, its feature exists
Display is also included in, the described protection device for compressor control loop, wherein,
When described undercurrent fault occurs in described compressor control loop, control described display display undercurrent fault
Code；
When described overcurrent fault occurs in described compressor control loop, control described display display overcurrent fault
Code.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510033768.3A CN105864007A (en) | 2015-01-23 | 2015-01-23 | Protection device for compressor control circuit and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510033768.3A CN105864007A (en) | 2015-01-23 | 2015-01-23 | Protection device for compressor control circuit and control method thereof |
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| CN105864007A true CN105864007A (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510033768.3A Pending CN105864007A (en) | 2015-01-23 | 2015-01-23 | Protection device for compressor control circuit and control method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109236627A (en) * | 2018-09-10 | 2019-01-18 | 珠海格力电器股份有限公司 | Compressor protection circuit, circuit system and air conditioner |
| CN110159521A (en) * | 2018-02-11 | 2019-08-23 | 杭州先途电子有限公司 | A kind of judgment method that compressor overcurrent reports an error and control device |
| CN110588689A (en) * | 2019-11-14 | 2019-12-20 | 新誉轨道交通科技有限公司 | Detection method and related device for protection fault of air conditioner compressor |
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