CN105781953A - Control method and controller for preventing compressor from being overloaded, and air conditioner - Google Patents
Control method and controller for preventing compressor from being overloaded, and air conditioner Download PDFInfo
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Abstract
The invention discloses a control method for preventing a compressor from being overloaded. The control method for preventing the compressor from being overloaded includes the following steps of receiving an output signal of the compressor, obtaining the output duration of the output signal according to the received output signal, collecting an operation current signal of the compressor according to the obtained output duration, searching for a feedback signal input by a trigger electric control chip during operation of the compressor, judging whether the value of the current signal is the preset current signal value or not when the feedback signal is obtained, determining that the current signal is an overload signal when the value of the current signal is not equal to the preset current signal value, and controlling the compressor to switch off the output signal so as to prevent the compressor from being overloaded. The invention further discloses a controller. By means of the control method and the controller, the current state of the compressor can be monitored in real time, and accordingly the security level of operation of the compressor is increased.
Description
Technical field
The present invention relates to refrigeration technology field, particularly relate to and a kind of prevent the control method of overload of compressor, controller and air-conditioner.
Background technology
Existing compressor is usually exported 220V/50Hz by electric-controlled plate and controls the coil of A.C. contactor, and three groups of main contacts of A.C. contactor connect the U-V-W three-phase 380V/50Hz of compressor.A.C. contactor is connected with thermorelay; when electric current flows through thermorelay; the critesistor PTC heating of thermorelay; and the auxiliary normally-closed contact of thermorelay can be caused to become normally opened with the increase of electric current; by the change of normally-closed contact signal is fed back to electric-controlled plate, thus reaching the effect of stoppage protection.This scheme avoids overload of compressor to reach stoppage protection only by the normally closed switch feedback signal of thermorelay, thus measures the overload of compressor, it is necessary to spended time, consequently, it is possible to cause the coil of compressor to burn out.
Foregoing is only used for assisting understanding technical scheme, does not represent and admits that foregoing is prior art.
Summary of the invention
Offer being provided and a kind of prevents the control method of overload of compressor, controller and air-conditioner, it is intended to monitoring the current status of compressor in real time, thus improving the safe class of compressor operating.
For achieving the above object, the present invention provides a kind of control method preventing overload of compressor, described in prevent the control method of overload of compressor from comprising the following steps:
Receive the output signal of compressor；
Obtain the continuous output time of described output signal；
According to the continuous output time obtained, the current signal that collect and process machine runs；
The feedback signal of electric-controlled plate chip input is triggered, when getting described feedback signal, it is judged that whether described current signal is predetermined current signal value during search compressor operating；
When value at described current signal is not equal to predetermined current signal value, it is determined that described current signal is overload signal, and control compressor closedown output signal, to prevent overload of compressor.
Preferably, the step of the continuous output time of the described output signal of described acquisition includes:
Whether the value judging described output signal is preset output signal value；
When the value of described output signal is for presetting output signal value, obtain the continuous output time of described output signal.
Preferably, described according to the continuous output time obtained, the step of the current signal that collect and process machine runs includes:
Judge that described continuous output time is whether in preset time range；
When described continuous output time is in preset time range, the current signal that collect and process machine runs.
Preferably, also include before the step of the output signal of described acquisition compressor:
Start compressor protection program, obtain starting-up signal；
Judge that whether the value of described starting-up signal is equal to presetting starting-up signal value；
When the value judging described starting-up signal is not equal to default starting-up signal value, close compressor defence program.
Preferably, described according to the continuous output time obtained, it is judged that also to include after the described output time whether step in preset time range:
When described output time is not in preset time range, then close compressor defence program.
Additionally, for achieving the above object, the present invention also provides for a kind of controller, and described controller includes:
Receiver module, for receiving the output signal of compressor；
Acquisition module, for obtaining the continuous output time of described output signal；
Acquisition module, for according to the continuous output time obtained, the current signal that collect and process machine runs；
First judge module, triggers the feedback signal of electric-controlled plate chip input, when getting described feedback signal, it is judged that whether described current signal is predetermined current signal value during for searching for compressor operating；
First controls module, for when the value of described current signal is not equal to predetermined current signal value, it is determined that described current signal is overload signal, and controls compressor closedown output signal, to prevent overload of compressor.
Preferably, described acquisition module includes:
Whether the first judging unit, be preset output signal value for judging the value of described output signal；
First acquiring unit, for when the value of described output signal is for presetting output signal value, obtaining the continuous output time of described output signal.
Preferably, described acquisition module includes:
Second judging unit, is used for judging that described continuous output time is whether in preset time range；
Second acquisition unit, is used for when described continuous output time is in preset time range, the current signal that collect and process machine runs.
Preferably, described controller also includes:
Start module, be used for starting compressor protection program, obtain starting-up signal；
Second controls module, is used for when the value judging described starting-up signal is not equal to default starting-up signal value, close compressor defence program.
Preferably, described acquisition module also includes:
Control unit, is used for when described output time is not in preset time range, then close compressor defence program.
Additionally, for achieving the above object, the present invention also provides for a kind of air-conditioner, and described air-conditioner includes controller as above.
The present invention is by obtaining the continuous output time of described output signal, and according to the continuous output time obtained, the current signal that collect and process machine runs, when getting described feedback signal, it is judged that whether described current signal is predetermined current signal value, when described current signal is not equal to predetermined current signal value, judge that described current signal is as overload signal, and control compressor closedown output signal, it is possible to monitor the current status of compressor in real time, thus improving the safe class of compressor operating.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet that the present invention prevents control method one embodiment of overload of compressor；
Fig. 2 is the refinement schematic flow sheet of step S102 in Fig. 1；
Fig. 3 is the refinement schematic flow sheet of step S103 first embodiment in Fig. 1；
Fig. 4 is the schematic flow sheet that the present invention prevents another embodiment of control method of overload of compressor；
Fig. 5 is the refinement schematic flow sheet of step S103 the second embodiment in Fig. 1；
Fig. 6 is the high-level schematic functional block diagram of controller one embodiment of the present invention；
Fig. 7 is the refinement high-level schematic functional block diagram of acquisition module in Fig. 6；
Fig. 8 is the refinement high-level schematic functional block diagram of acquisition module first embodiment in Fig. 6；
Fig. 9 is the high-level schematic functional block diagram of another embodiment of controller of the present invention；
Figure 10 is the refinement high-level schematic functional block diagram of acquisition module the second embodiment in Fig. 6.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
The present invention provides a kind of control method preventing overload of compressor, with reference to Fig. 1, in one embodiment, described in prevent the control method of overload of compressor from comprising the following steps:
Step S101, receives the output signal of compressor；
Step S102, obtains the continuous output time of described output signal；
In the present embodiment, controller receives the output signal B of compressor, and the output signal B obtained is judged, if output signal B is equal to presetting output signal value such as 1, then controls compressor and continues to export signal；If output signal B is not equal to default output signal value such as 0, then controls compressor and close output.Wherein, described output signal B is equal to when presetting output signal value, it was shown that the switch of relay etc applies the voltage on the motor of described compressor, and drives described compressor operating normally.It is understood that described output signal B can as the Warning Mark controlling described compressor switch.
Step S103, according to the continuous output time obtained, the current signal that collect and process machine runs；
In the present embodiment, first 6 seconds started due to compressor starts, the running current of compressor is usually 2～3 times of rated current, if time delay is not enough, can cause that the current signal of the compressor operating that controller gathers is excessive, thus producing misoperation.In order to ensure the accuracy of the current signal of the compressor operating of collection, so needing the current signal that time delay compressor output signal goes collect and process machine to run after 10 seconds again.
In the present embodiment, if compressor output signal continues time delay Preset Time such as 10 seconds, then represent that this compressor comes in normal course of operation, the current signal S of the compressor operating now gathered be exactly this compressor properly functioning time corresponding current value, it is possible to the real working condition reacting this compressor.
Step S104, triggers the feedback signal of electric-controlled plate chip input, when getting described feedback signal, it is judged that whether described current signal is predetermined current signal value during search compressor operating；
In the present embodiment, trigger the feedback signal SZ of electric-controlled plate chip input during controller search compressor operating, if getting described feedback signal SZ, then it represents that current signal S is the signal after compressor start；Without searching described feedback signal SZ, then it represents that current signal S is probably the signal that other interfering noises produce, consequently, it is possible to cause the misoperation of controller, and then causes that controller is abnormal.It should be appreciated that can set that the circuit of described compressor is in closure state when controller detects that the voltage that electric-controlled plate chip inputs is 5V, now SZ is equal to 1；When controller detects that the voltage that electric-controlled plate chip inputs is 0V, the circuit of described compressor is off, and now SZ is equal to 0.
Step S105, when the value at described current signal is not equal to predetermined current signal value, it is determined that described current signal is overload signal, and controls compressor closedown output signal, to prevent overload of compressor.
In the present embodiment, when described controller gets described feedback signal SZ, judge whether described current signal S is predetermined current signal value such as 0: when described current signal S is not equal to predetermined current signal value 0, judge that described current signal is as overload signal, and control compressor closedown output signal B, to prevent overload of compressor.
The present invention adopts Principle of Current Mutual Inductance, when after compressor start, electric current produces faradic current I by current transformer coupling, after faradic current I flows through resistance R, thus producing induced voltage U=I*R, induced voltage signal is by, after filtering current limliting, producing detection voltage Ux, described detection voltage Ux is delivered directly to the simulation mouth detection of electric-controlled plate chip, the change of the change in voltage of the Ux directly input current of corresponding compressor.If when the input current of compressor is more than the compressor maximum current value Imax set (I > Imax); the Ux > Umax that then electric-controlled plate chip detection arrives; namely electric-controlled plate chip produces a current overload signal; controller and close compressor output, thus protecting compressor coil to be burned out.
So, the current detecting of compressor adopts chip simulation mouth can monitor the current status of compressor in real time, it is possible to the protection of compressor is more quick and accurately, thus improving the safe class of compressor operating, and then reduce compressor burn out probability.
In one embodiment, as in figure 2 it is shown, on the basis of the embodiment of above-mentioned Fig. 1, in the present embodiment, described step S102 includes:
Step S1021, it is judged that whether the value of described output signal is preset output signal value；
Step S1022, when the value of described output signal is for presetting output signal value, obtains the continuous output time of described output signal.
In the present embodiment, controller receives the output signal B of compressor, and the output signal B obtained is judged, if output signal B is equal to presetting output signal value such as 1, then controls compressor and continues to export signal.
In the present embodiment, controller obtains the continuous output time T of described output signal.
In one embodiment, as it is shown on figure 3, on the basis of the embodiment of above-mentioned Fig. 1, in the present embodiment, described step S103 includes:
Step S1031, it is judged that whether described continuous output time is in preset time range；
In the present embodiment, first 6 seconds started due to compressor starts, the running current of compressor is usually 2～3 times of rated current, if time delay is not enough, can cause that the current signal of the compressor operating that controller gathers is excessive, thus producing misoperation.
Step S1032, when described continuous output time is in preset time range, the current signal that collect and process machine runs.
In the present embodiment, in order to ensure the accuracy of the current signal of the compressor operating of collection, so needing the current signal that time delay compressor output signal Preset Time goes collect and process machine to run after such as 10 seconds again.So, if compressor output signal continues delay time >=10 second, then represent that this compressor comes in normal course of operation, the current signal S of the compressor operating now gathered be exactly this compressor properly functioning time corresponding current value, it is possible to the real working condition reacting this compressor.
In one embodiment, as shown in Figure 4, on the basis of the embodiment of above-mentioned Fig. 1, in the present embodiment, also include before described step S101:
Step S106, starts compressor protection program, obtains starting-up signal；
Step S107, it is judged that whether the value of described starting-up signal is equal to presetting starting-up signal value；
Step S108, when the value judging described starting-up signal is not equal to default starting-up signal value, close compressor defence program.
In the present embodiment, controller starts compressor protection program, obtains the starting-up signal F of compressor, and described starting-up signal F is judged, if described starting-up signal F is equal to preset value such as 1, then it represents that has start-up command, and continues to obtain starting-up signal；If described starting-up signal F is not equal to preset value such as 0, then it represents that without start-up command, then directly terminate compressor protection program.
In one embodiment, as it is shown in figure 5, on the basis of the embodiment of above-mentioned Fig. 3, in the present embodiment, also include after described step S1031:
Step S1033, when described continuous output time is not in preset time range, then close compressor defence program.
In the present embodiment; when the compressor continuous output time of controller acquisition is not in preset range; as during less than 10 seconds; the current signal S of the compressor operating now gathered be not compressor properly functioning time corresponding current value; therefore; the working condition of compressor can not be reacted really, now controller close compressor defence program.
The present invention also provides for a kind of controller 1, and with reference to Fig. 6, in one embodiment, described controller 1 includes:
Receiver module 101, for receiving the output signal of compressor；
Acquisition module 102, for obtaining the continuous output time of described output signal；
In the present embodiment, controller 1 receives the output signal B of compressor, and the output signal B obtained is judged, if output signal B is equal to presetting output signal value such as 1, then controls compressor and continues to export signal；If output signal B is not equal to default output signal value such as 0, then controls compressor and close output.
Wherein, described output signal B is equal to when presetting output signal value, it was shown that the switch of relay etc applies the voltage on the motor of described compressor, and drives described compressor operating normally.It is understood that described output signal B can as the Warning Mark controlling described compressor switch.
Acquisition module 103, for according to the continuous output time obtained, the current signal that collect and process machine runs；
In the present embodiment, first 6 seconds started due to compressor starts, the running current of compressor is usually 2～3 times of rated current, if time delay is not enough, can cause that the current signal of the compressor operating that controller 1 gathers is excessive, thus producing misoperation.In order to ensure the accuracy of the current signal of the compressor operating of collection, so needing the current signal that time delay compressor output signal goes collect and process machine to run after 10 seconds again.
In the present embodiment, if compressor output signal continues time delay Preset Time such as 10 seconds, then represent that this compressor comes in normal course of operation, the current signal S of the compressor operating now gathered be exactly this compressor properly functioning time corresponding current value, it is possible to the real working condition reacting this compressor.
First judge module 104, triggers the feedback signal of electric-controlled plate chip input, when getting described feedback signal, it is judged that whether described current signal is predetermined current signal value during for searching for compressor operating；
In the present embodiment, controller 1 triggers the feedback signal SZ of electric-controlled plate chip input when searching for compressor operating, if getting described feedback signal SZ, then it represents that current signal S is the signal after compressor start；Without searching described feedback signal SZ, then it represents that current signal S is probably the signal that other interfering noises produce, consequently, it is possible to cause the misoperation of controller 1, and then causes that controller 1 is abnormal.It should be appreciated that can set that the circuit of described compressor is in closure state when controller detects that the voltage that electric-controlled plate chip inputs is 5V, now SZ is equal to 1；When controller detects that the voltage that electric-controlled plate chip inputs is 0V, the circuit of described compressor is off, and now SZ is equal to 0.
First controls module 105, for when the value of described current signal is not equal to predetermined current signal value, it is determined that described current signal is overload signal, and controls compressor closedown output signal, to prevent overload of compressor.
In the present embodiment, when described controller 1 gets described feedback signal SZ, judge whether described current signal S is predetermined current signal value such as 0: when described current signal S is not equal to predetermined current signal value 0, judge that described current signal is as overload signal, and control compressor closedown output signal B, to prevent overload of compressor.
The present invention adopts Principle of Current Mutual Inductance, when after compressor start, electric current produces faradic current I by current transformer coupling, after faradic current I flows through resistance R, thus producing induced voltage U=I*R, induced voltage signal is by, after filtering current limliting, producing detection voltage Ux, described detection voltage Ux is delivered directly to the simulation mouth detection of electric-controlled plate chip, the change of the change in voltage of the Ux directly input current of corresponding compressor.If when the input current of compressor is more than the compressor maximum current value Imax set (I > Imax); the Ux > Umax that then electric-controlled plate chip detection arrives; namely electric-controlled plate chip produces a current overload signal; the i.e. close compressor of controller 1 exports, thus protecting compressor coil to be burned out.
So, the current detecting of compressor adopts chip simulation mouth can monitor the current status of compressor in real time, it is possible to the protection of compressor is more quick and accurately, thus improving the safe class of compressor operating, and then reduce compressor burn out probability.
In one embodiment, as it is shown in fig. 7, on the basis of the embodiment of above-mentioned Fig. 6, in the present embodiment, described acquisition module 102 includes:
Whether the first judging unit 1021, be preset output signal value for judging the value of described output signal；
First acquiring unit 1022, for when the value of described output signal is for presetting output signal value, obtaining the continuous output time of described output signal.
In the present embodiment, controller 1 receives the output signal B of compressor, and the output signal B obtained is judged, if output signal B is equal to presetting output signal value such as 1, then controls compressor and continues to export signal.
In the present embodiment, controller 1 obtains the continuous output time T of described output signal.
In one embodiment, as shown in Figure 8, on the basis of the embodiment of above-mentioned Fig. 6, in the present embodiment, described acquisition module 103 includes:
Second judging unit 1031, is used for judging that described continuous output time is whether in preset time range；
In the present embodiment, first 6 seconds started due to compressor starts, the running current of compressor is usually 2～3 times of rated current, if time delay is not enough, can cause that the current signal of the compressor operating that controller 1 gathers is excessive, thus producing misoperation.
Second acquisition unit 1032, is used for when described continuous output time is in preset time range, the current signal that collect and process machine runs.
In the present embodiment, in order to ensure the accuracy of the current signal of the compressor operating of collection, so needing the current signal that time delay compressor output signal Preset Time goes collect and process machine to run after such as 10 seconds again.So, if compressor output signal continues delay time >=10 second, then represent that this compressor comes in normal course of operation, the current signal S of the compressor operating now gathered be exactly this compressor properly functioning time corresponding current value, it is possible to the real working condition reacting this compressor.
In one embodiment, as it is shown in figure 9, on the basis of the embodiment of above-mentioned Fig. 6, in the present embodiment, described controller 1 also includes:
Start module 106, be used for starting compressor protection program, obtain starting-up signal；
Second judge module 107, presets starting-up signal value for whether being equal in the value judging described starting-up signal；
Second controls module 108, is used for when the value judging described starting-up signal is not equal to default starting-up signal value, close compressor defence program.
In the present embodiment, controller 1 starts compressor protection program, obtains the starting-up signal F of compressor, and described starting-up signal F is judged, if described starting-up signal F is equal to preset value such as 1, then it represents that has start-up command, and continues to obtain starting-up signal；If described starting-up signal F is not equal to preset value such as 0, then it represents that without start-up command, then directly terminate compressor protection program.
In one embodiment, as shown in Figure 10, on the basis of the embodiment of above-mentioned Fig. 8, in the present embodiment, described acquisition module 103 also includes:
Control unit 1033, is used for when described output time is not in preset time range, then close compressor defence program.
In the present embodiment; when the compressor continuous output time of controller 1 acquisition is not in preset range; as during less than 10 seconds; the current signal S of the compressor operating now gathered be not compressor properly functioning time corresponding current value; therefore; the working condition of compressor can not be reacted really, now controller 1 close compressor defence program.
The present invention also provides for a kind of air-conditioner, and in one embodiment, described air-conditioner includes controller 1 as above.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the present invention and accompanying drawing content to make or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all in like manner include in the scope of patent protection of the present invention.
Claims (11)
1. the control method preventing overload of compressor, it is characterised in that described in prevent the control method of overload of compressor from comprising the following steps:
Receive the output signal of compressor；
Obtain the continuous output time of described output signal；
According to the continuous output time obtained, the current signal that collect and process machine runs；
The feedback signal of electric-controlled plate chip input is triggered, when getting described feedback signal, it is judged that whether described current signal is predetermined current signal value during search compressor operating；
When value at described current signal is not equal to predetermined current signal value, it is determined that described current signal is overload signal, and control compressor closedown output signal, to prevent overload of compressor.
2. prevent the control method of overload of compressor as claimed in claim 1, it is characterised in that the step of the continuous output time of the described output signal of described acquisition includes:
Whether the value judging described output signal is preset output signal value；
When the value of described output signal is for presetting output signal value, obtain the continuous output time of described output signal.
3. prevent the control method of overload of compressor as claimed in claim 1, it is characterised in that described according to the continuous output time obtained, the step of the current signal that collect and process machine runs includes:
Judge that described continuous output time is whether in preset time range；
When described continuous output time is in preset time range, the current signal that collect and process machine runs.
4. prevent the control method of overload of compressor as claimed any one in claims 1 to 3, it is characterised in that also include before the step of the output signal of described acquisition compressor:
Start compressor protection program, obtain starting-up signal；
Judge that whether the value of described starting-up signal is equal to presetting starting-up signal value；
When the value judging described starting-up signal is not equal to default starting-up signal value, close compressor defence program.
5. prevent the control method of overload of compressor as claimed in claim 4, it is characterised in that described according to the continuous output time obtained, it is judged that also include after the described output time whether step in preset time range:
When described output time is not in preset time range, then close compressor defence program.
6. a controller, it is characterised in that described controller includes:
Receiver module, for receiving the output signal of compressor；
Acquisition module, for obtaining the continuous output time of described output signal；
Acquisition module, for according to the continuous output time obtained, the current signal that collect and process machine runs；
First judge module, triggers the feedback signal of electric-controlled plate chip input, when getting described feedback signal, it is judged that whether described current signal is predetermined current signal value during for searching for compressor operating；
First controls module, for when the value of described current signal is not equal to predetermined current signal value, it is determined that described current signal is overload signal, and controls compressor closedown output signal, to prevent overload of compressor.
7. controller as claimed in claim 6, it is characterised in that described acquisition module includes:
Whether the first judging unit, be preset output signal value for judging the value of described output signal；
First acquiring unit, for when the value of described output signal is for presetting output signal value, obtaining the continuous output time of described output signal.
8. controller as claimed in claim 6, it is characterised in that described acquisition module includes:
Second judging unit, is used for judging that described continuous output time is whether in preset time range；
Second acquisition unit, is used for when described continuous output time is in preset time range, the current signal that collect and process machine runs.
9. the controller as according to any one of claim 6 to 8, it is characterised in that described controller also includes:
Start module, be used for starting compressor protection program, obtain starting-up signal；
Second judge module, presets starting-up signal value for whether being equal in the value judging described starting-up signal；
Second controls module, is used for when the value judging described starting-up signal is not equal to default starting-up signal value, close compressor defence program.
10. controller as claimed in claim 9, it is characterised in that described acquisition module also includes:
Control unit, is used for when described output time is not in preset time range, then close compressor defence program.
11. an air-conditioner, it is characterised in that described air-conditioner includes the controller as according to any one of claim 6 to 10.
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| CN203384023U (en) * | 2013-07-25 | 2014-01-08 | 珠海格力电器股份有限公司 | Compressor overload protection system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112268349A (en) * | 2020-10-26 | 2021-01-26 | 珠海格力电器股份有限公司 | Air conditioner, control method thereof, and computer-readable storage medium |
| CN112268349B (en) * | 2020-10-26 | 2021-08-13 | 珠海格力电器股份有限公司 | Air conditioner, control method thereof, and computer-readable storage medium |
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