CN205534492U - Driving signal anti-collision protection device and air conditioning system - Google Patents
Driving signal anti-collision protection device and air conditioning system Download PDFInfo
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- CN205534492U CN205534492U CN201620083210.6U CN201620083210U CN205534492U CN 205534492 U CN205534492 U CN 205534492U CN 201620083210 U CN201620083210 U CN 201620083210U CN 205534492 U CN205534492 U CN 205534492U
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Abstract
The utility model discloses a drive signal collision avoidance device and air conditioning system, the device includes: the protection circuit comprises a main chip (100), a protection circuit (200) and a driving circuit (300), wherein the main chip (100) is configured to initiate a driving signal to the driving circuit (300); the protection circuit (200) is respectively connected to the main chip (100) and the driving circuit (300) and is configured to: judging the state of the driving signal, and selecting and outputting an effective driving signal to the driving circuit (300) when the state judgment result contains the effective driving signal, so as to prevent the driving signal from colliding; a driver circuit (300) configured to drive a respective load based on a path of active drive signals. The utility model discloses a scheme can overcome prior art anti interference ability weak, response speed is slow and defect such as reliability difference, realizes that the interference killing feature is strong, response speed is fast and the beneficial effect that the reliability is high.
Description
Technical Field
The utility model relates to an air conditioning technology field specifically, relates to a drive signal collision avoidance device and air conditioning system, especially relates to a two way solenoid valve anticollision hardware protection device of air conditioner and air conditioning system.
Background
As an air conditioning apparatus, an air conditioner has gradually become a necessity for daily life. Generally, an air conditioning system can realize air conditioning through the cooperative control of an electromagnetic valve and a compressor. As shown in FIG. 1, an air conditioning system includes a control switch K, a first compressor solenoid valve, a second compressor solenoid valve, and a compressor (e.g., model F518). Two electromagnetic valves (for example, a first compressor electromagnetic valve and a second compressor electromagnetic valve) are designed, and when the two electromagnetic valves are simultaneously switched on, system confusion is caused, and system reliability is affected, so that the two electromagnetic valves are required to be not simultaneously switched on.
At present, a software control method can be used for controlling (for example, hardware controls through a control switch K) the on-off relation of two electromagnetic valves, and the dead time of conversion of two driving signals is set. However, if other interference signals exist, the two electromagnetic valves may be turned on at the same time; furthermore, the response speed of software protection is much slower than the dynamic response speed of hardware protection.
In the prior art, the defects of weak anti-interference capability, slow response speed, poor reliability and the like exist.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the above-mentioned defect, provide a drive signal collision avoidance device and air conditioning system to effectively prevent two way drive signal's collision.
An aspect of the utility model provides a drive signal collision avoidance device, include: the protection circuit comprises a main chip, a protection circuit and a driving circuit, wherein the main chip is configured to initiate a driving signal to the driving circuit; the protection circuit is respectively connected to the main chip and the driving circuit, and is configured to: judging the state of the driving signal, and selecting and outputting one path of effective driving signal to the driving circuit when the state judgment result contains the effective driving signal, so as to prevent the driving signal from colliding; the driving circuit is configured to drive the corresponding load based on the one path of effective driving signal.
Preferably, the protection circuit includes: a first protection circuit; wherein the first protection circuit comprises: a photocoupler PC 817; when the driving signals are two paths, a collector of a triode in the photoelectric coupler PC817 is connected to a first path of driving signal initiating end of the main chip and is used as an effective driving signal output end of the first path of driving signal; the anode of a light emitting diode in the photoelectric coupler PC817 is connected to the second path of driving signal initiating end of the main chip; and the cathode of the light emitting diode in the photoelectric coupler PC817 is used as an effective driving signal output end of the second path of driving signal.
Preferably, the first protection circuit further includes: a first current limiting resistor; the first current limiting resistor is connected between a collector of a triode in the photoelectric coupler PC817 and a first path of driving signal initiating end of the main chip.
Preferably, the first protection circuit further includes: a first pull-down resistor and a second pull-down resistor; the first pull-down resistor is connected between the collector of the triode in the photoelectric coupler PC817 and the ground; and the second pull-down resistor is connected between the cathode of the light emitting diode in the photoelectric coupler PC817 and the ground.
Preferably, the protection circuit further includes: a second protection circuit; wherein the second protection circuit comprises: the triode and the second current limiting resistor; when the driving signals are two paths, the collector electrode of the triode is connected to the first path of driving signal initiating end of the main chip and is used as an effective driving signal output end of the first path of driving signal; the base electrode of the triode is connected to the second path of driving signal initiating end of the main chip after passing through the second current limiting resistor; and the connecting end of the second current limiting resistor and the main chip is used as an effective driving signal output end of the second path of driving signal.
Preferably, the second protection circuit further includes: a third current limiting resistor; the third current limiting resistor is connected between the collector of the triode and the first drive signal initiating end of the main chip.
Preferably, the second protection circuit further includes: a third pull-down resistor and a fourth pull-down resistor; the third pull-down resistor is connected between the collector of the triode and the ground; and the fourth pull-down resistor is connected between the second path of driving signal starting end of the main chip and the ground.
Preferably, when the driving signal is two paths, the driving circuit includes: the first path of electromagnetic valve driving circuit and the second path of electromagnetic valve driving circuit; the first path of electromagnetic valve driving circuit and the second path of electromagnetic valve driving circuit are respectively connected to the corresponding driving signal initiating end of the main chip through the protection circuit.
With above-mentioned drive signal collision avoidance device phase-match, the utility model discloses another aspect provides an air conditioning system, include: the drive signal anti-collision protection device is described above.
The scheme of the utility model, the anti-collision protection is carried out by adding a hardware circuit, and the reliability of protection is high; the hardware circuit is simple in topology, can effectively realize the anti-collision function of the two driving signals, further improves the control scheme (such as an air conditioner control electromagnetic valve scheme) of the two driving signal system, and ensures the reliability and stability of the system.
Further, the utility model discloses a scheme is realized simply through hardware circuit, and dynamic response is effectual, can effectively realize two way drive signal's anticollision problem, and then the security of lift system operation.
Therefore, the utility model discloses a scheme solution utilizes drive signal anticollision protection circuit to carry out the anticollision and handles, more accurately controls drive signal, promotes control efficiency, reduces the problem of the control degree of difficulty to, overcome the defect that anti-interference ability is weak in the prior art, response speed is slow and the reliability is poor, realize that the interference killing feature is strong, response speed is fast and the beneficial effect that the reliability is high.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a prior art air conditioning system;
fig. 2 is a schematic structural diagram of an embodiment of the driving signal collision avoidance apparatus of the present invention;
fig. 3 is a schematic view of the working principle of an embodiment of the driving signal collision avoidance apparatus of the present invention;
fig. 4 is a schematic diagram of an operation principle of an embodiment of a first protection circuit (i.e., an anti-collision protection circuit designed by an optical coupler) in the present invention;
fig. 5 is a schematic diagram of an embodiment of the second protection circuit (i.e., an anti-collision protection circuit designed by a triode) according to the present invention.
With reference to the accompanying drawings, the embodiments of the present invention have the following reference numerals:
100-a master chip; 200-a protection circuit; 202-a first protection circuit; 204-a second protection circuit; 300-a drive circuit; 302-a first solenoid valve drive circuit; 304-second solenoid valve drive circuit.
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
According to the utility model discloses an embodiment provides a drive signal collision avoidance device. This drive signal collision avoidance device includes: a main chip 100, a protection circuit 200 and a driving circuit 300. Wherein, the main chip 100 is configured to initiate a driving signal to the driving circuit 300; a protection circuit 200 connected to the main chip 100 and the driving circuit 300, respectively, and configured to: judging the state of the driving signal, and when the state judgment result contains an effective driving signal, selecting an effective driving signal and outputting the effective driving signal to the driving circuit 300 for preventing the driving signal from colliding; the driving circuit 300 is configured to drive a corresponding load based on one path of effective driving signals. Through the protection circuit, the anti-collision protection can be carried out from the aspect of hardware circuits, and the protection measures can be quickly responded when two paths of driving signals collide, so that the stability and the reliability of the system operation are enhanced.
In one embodiment, the protection circuit 200 includes: the first protection circuit 202. The first protection circuit 202 includes: a photocoupler PC 817; when the driving signals are two paths, the collector of the triode in the photoelectric coupler PC817 is connected to the first driving signal initiating terminal K1 of the main chip 100 and serves as the effective driving signal output terminal K11 of the first driving signal; the anode of the light emitting diode in the photocoupler PC817 is connected to the second driving signal initiating terminal K2 of the main chip 100; and the cathode of the light emitting diode in the photoelectric coupler PC817 is used as an effective driving signal output end K21 of the second path of driving signal. Carry out collision avoidance through photoelectric coupler, circuit structure is simple, and the protection reliability is high.
Preferably, the first protection circuit 202 further includes: a first current limiting resistor R5; the first current limiting resistor R5 is connected between the collector of the transistor in the photocoupler PC817 and the first driving signal initiation end K1 of the main chip 100. Through the current-limiting resistor, the safety of photoelectric coupler itself can be guaranteed on the one hand, and the operational reliability of the first protection circuit can be enhanced on the other hand.
Preferably, the first protection circuit 202 further includes: a first pull-down resistor R6 and a second pull-down resistor R7; the first pull-down resistor R6 is connected between the collector of the triode in the photoelectric coupler PC817 and the ground; and a second pull-down resistor R7 connected between the cathode of the LED in the photocoupler PC817 and ground. Through the pull-down resistor, when two paths of driving signals are high levels, one path of driving signals can be pulled down in an auxiliary mode, and therefore reliability and safety of control of the photoelectric coupler are improved.
Therefore, the first protection circuit is used for performing anti-collision protection on the aspect of hardware circuits, so that the anti-collision of two driving signals can be realized, the circuit topology is easy to realize, the response speed is high, and the reliability and the safety of the anti-collision protection are improved.
In another embodiment, the protection circuit 200 further includes: a second protection circuit 204. Wherein, the second protection circuit 204 includes: a transistor Q1 and a second current limiting resistor R3; when the driving signals are two paths, the collector of the triode Q1 is connected to the first driving signal initiating terminal K1 of the main chip 100 and serves as the effective driving signal output terminal K11 of the first driving signal; the base electrode of the triode Q1 is connected to the second driving signal initiating end K2 of the main chip 100 after passing through the second current limiting resistor R3; the connection end of the second current limiting resistor R3 and the main chip 100 is used as the effective driving signal output end K21 of the second driving signal. Carry out collision avoidance through the triode, circuit structure is simple and stability is good, and is with low costs, and response speed is fast, and the protection is effectual.
Preferably, the second protection circuit 204 further includes: a third current limiting resistor R1; the third current limiting resistor R1 is connected between the collector of the transistor Q1 and the first driving signal initiation terminal K1 of the main chip 100. Through the current-limiting resistor, the safety of the triode can be guaranteed on one hand, and the working reliability of the second protection circuit can be enhanced on the other hand.
Preferably, the second protection circuit 204 further includes: a third pull-down resistor R2 and a fourth pull-down resistor R4; the third pull-down resistor R2 is connected between the collector of the triode Q1 and the ground; and a fourth pull-down resistor R4 connected between the second driving signal start terminal K2 of the main chip 100 and ground. Through the pull-down resistor, when two paths of driving signals are high level, one path of driving signal can be pulled down in an auxiliary mode, and therefore reliability and safety of triode control are improved.
Preferably, when the driving signal is two-way, the driving circuit includes: a first way solenoid valve driving circuit 302 and a second way solenoid valve driving circuit 304; the first way of solenoid valve driving circuit 302 and the second way of solenoid valve driving circuit 304 are respectively connected to the corresponding driving signal initiating terminal of the main chip 100 through the protection circuit 200. The drive of the electromagnetic valve drive circuit is controlled through the protection circuit, the protection reliability is high, and the drive safety is good.
Therefore, the second protection circuit has good dynamic response effect, can effectively realize the anti-collision of two paths of driving signals, more perfects the scheme of system control (such as an air conditioner control electromagnetic valve), ensures the reliability and stability of the system operation and has good safety.
It can be seen that the two hardware circuit topologies (e.g., the first protection circuit 202 and the second protection circuit 204) can solve the problem of collision prevention of two driving signals (e.g., two solenoid driving signals of an air conditioner) of a load, and can be selected according to the factors such as cost and control accuracy in practical application.
Through a large number of tests, the technical scheme of the embodiment is adopted, and the anti-collision protection is carried out by adding a hardware circuit, so that the protection reliability is high; the hardware circuit is simple in topology, can effectively realize the anti-collision function of the two driving signals, further improves the control scheme (such as an air conditioner control electromagnetic valve scheme) of the two driving signal system, and ensures the reliability and stability of the system.
According to the utility model discloses an embodiment still provides an air conditioning system corresponding to drive signal collision avoidance device. This air conditioning system includes: the drive signal anti-collision protection device is described above.
The driving signal anti-collision protection device is not limited to the driving signal anti-collision protection of the air conditioner control electromagnetic valve, and can also be applied to the driving signal anti-collision protection of other control loads.
Since the processing and functions of the air conditioning system of this embodiment are basically corresponding to the embodiments, principles and examples of the driving signal anti-collision protection device shown in fig. 2 to fig. 3, the description of this embodiment is not detailed, and reference may be made to the related descriptions in the embodiments, which are not repeated herein.
Through a large amount of experimental verifications, adopt the technical scheme of the utility model, it is simple to realize through hardware circuit, and dynamic response is effectual, can realize two way drive signal's anticollision problem effectively, and then the security and the stability of lift system operation.
According to the utility model discloses an embodiment still provides the control method who corresponds to air conditioning system's an air conditioning system, includes: based on the air conditioning system, the driving signal collision avoidance processing is performed through the protection circuit 200.
Specifically, the driving signal collision avoidance processing performed by the protection circuit 200 includes: when the driving signals are two paths, if the first driving signal initiating terminal K1 is at a high level and the second driving signal initiating terminal K2 is at a low level, the protection circuit 200 enables the first driving signal initiating terminal K1 to output a valid signal, and controls the corresponding driving branch in the driving circuit 300 to be opened; or, if the first driving signal initiating terminal K1 is at a low level and the second driving signal initiating terminal K2 is at a high level, the protection circuit 200 enables the output of the second driving signal initiating terminal K2 to be valid, and controls the corresponding driving branch in the driving circuit 300 to be opened; or, if the first driving signal initiating terminal K1 is at a high level and the second driving signal initiating terminal K2 is at a high level, the protection circuit 200 forcibly pulls down the first driving signal initiating terminal K1 and enables the output of the second driving signal initiating terminal K2 to be valid, so as to control the corresponding driving branch in the driving circuit 300 to be opened; alternatively, if the first driving signal initiating terminal K1 is at a low level and the second driving signal initiating terminal K2 is at a low level, the protection circuit 200 does not output the active driving signal.
For example: as shown in fig. 4, K1 and K2 are two driving signals, and the high level is active, which requires that the two driving signals cannot be high at the same time. When K1 is high and K2 is low, the driving signal K1 is asserted to control the first solenoid valve CN1 to open. When the voltage K1 is low and the voltage K2 is high, the driving signal K2 is asserted to control the second solenoid valve CN2 to open. When K1 is at a high level and K2 is also at a high level, K2 drives the light emitting diode in the photocoupler PC817 to be turned on, and the driving signal K1 is forcibly pulled down through the first current limiting resistor R5, the first pull-down resistor R6 and the second pull-down resistor R7, so that the driving signal K2 is output to be valid, and at this time, only the second electromagnetic valve CN2 can be turned on. When K1 is low and K2 is low, there is no drive signal. The circuit topology always keeps at most one path of signals on, and the anti-collision of two paths of driving signals can be effectively realized and ensured.
As shown in fig. 5, K1 and K2 are two driving signals, and the high level is active, which requires that the two driving signals cannot be high simultaneously. When K1 is high and K2 is low, the driving signal K1 is asserted to control the first solenoid valve CN1 to open. When the voltage K1 is low and the voltage K2 is high, the driving signal K2 is asserted to control the second solenoid valve CN2 to open. When K1 is at a high level and K2 is also at a high level, K2 drives the transistor to be turned on, and through the third current-limiting resistor R1, the third current-limiting resistor R1, the third pull-down resistor R2 and the fourth pull-down resistor R4, K1 is forcibly pulled down, the driving signal K2 is output to be valid, and at this time, only the second solenoid valve CN2 can be turned on. When K1 is low and K2 is low, there is no drive signal. The circuit topology always keeps at most one path of signals conducted.
Since the processing and functions implemented by the control method of the air conditioning system of this embodiment substantially correspond to the embodiments, principles, and examples of the air conditioning system, the description of this embodiment is not given in detail, and reference may be made to the related descriptions in the embodiments, which are not described herein again.
Through a large amount of experimental verifications, adopt the technical scheme of the utility model, it is simple to realize through hardware circuit, and dynamic response is effectual, can realize two way drive signal's anticollision problem effectively, and then the security and the stability of lift system operation.
In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.
The above description is only an example of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (9)
1. A drive signal collision avoidance device, comprising: a main chip (100), a protection circuit (200) and a drive circuit (300), wherein,
the master chip (100) configured to initiate a drive signal to the drive circuit (300);
the protection circuit (200) is respectively connected to the main chip (100) and the driving circuit (300), and is configured to: judging the state of the driving signal, and selecting and outputting an effective driving signal to the driving circuit (300) when the state judgment result contains the effective driving signal, so as to prevent the driving signal from colliding;
the driving circuit (300) is configured to drive the corresponding load based on the one effective driving signal.
2. The apparatus of claim 1, wherein the protection circuit (200) comprises: a first protection circuit (202); wherein,
the first protection circuit (202) comprising: a photocoupler PC 817; wherein,
when the driving signals are two paths, a collector electrode of a triode in the photoelectric coupler PC817 is connected to a first path of driving signal initiating end (K1) of the main chip (100) and is used as an effective driving signal output end (K11) of the first path of driving signals;
The anode of a light emitting diode in the photoelectric coupler PC817 is connected to a second path of driving signal starting end (K2) of the main chip (100); and the cathode of the light emitting diode in the photoelectric coupler PC817 is used as an effective driving signal output end (K21) of the second path of driving signal.
3. The apparatus of claim 2, wherein the first protection circuit (202) further comprises: a first current limiting resistor (R5); wherein,
and the first current limiting resistor (R5) is connected between the collector of the triode in the photoelectric coupler PC817 and the first path of driving signal starting end (K1) of the main chip (100).
4. The apparatus of claim 2 or 3, wherein the first protection circuit (202) further comprises: a first pull-down resistor (R6) and a second pull-down resistor (R7); wherein,
the first pull-down resistor (R6) is connected between the collector of the triode in the photoelectric coupler PC817 and the ground;
and the second pull-down resistor (R7) is connected between the cathode of the light emitting diode in the photoelectric coupler PC817 and the ground.
5. The apparatus of claim 1, wherein the protection circuit (200) further comprises: a second protection circuit (204); wherein,
The second protection circuit (204) comprising: a triode (Q1) and a second current limiting resistor (R3); wherein,
when the driving signals are two paths, the collector electrode of the triode (Q1) is connected to a first path of driving signal initiating end (K1) of the main chip (100) and is used as an effective driving signal output end (K11) of the first path of driving signals;
the base electrode of the triode (Q1) is connected with a second driving signal starting end (K2) of the main chip (100) after passing through the second current limiting resistor (R3); the connection end of the second current limiting resistor (R3) and the main chip (100) is used as an effective driving signal output end (K21) of a second driving signal.
6. The apparatus of claim 5, wherein the second protection circuit (204) further comprises: a third current limiting resistor (R1); wherein,
the third current limiting resistor (R1) is connected between the collector of the triode (Q1) and the first drive signal starting end (K1) of the main chip (100).
7. The apparatus of claim 5 or 6, wherein the second protection circuit (204) further comprises: a third pull-down resistor (R2) and a fourth pull-down resistor (R4); wherein,
the third pull-down resistor (R2) is connected between the collector of the triode (Q1) and the ground;
The fourth pull-down resistor (R4) is connected between the second path driving signal starting end (K2) of the main chip (100) and the ground.
8. The apparatus of any one of claims 1-3, 5, and 6, wherein when the driving signal is two-way, the driving circuit comprises: a first way of electromagnetic valve driving circuit (302) and a second way of electromagnetic valve driving circuit (304); wherein,
the first path of electromagnetic valve driving circuit (302) and the second path of electromagnetic valve driving circuit (304) are respectively connected to the corresponding driving signal initiating end of the main chip (100) through the protection circuit (200).
9. An air conditioning system, comprising: a drive signal crash protection device according to any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620083210.6U CN205534492U (en) | 2016-01-27 | 2016-01-27 | Driving signal anti-collision protection device and air conditioning system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620083210.6U CN205534492U (en) | 2016-01-27 | 2016-01-27 | Driving signal anti-collision protection device and air conditioning system |
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| CN205534492U true CN205534492U (en) | 2016-08-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650328A (en) * | 2016-01-27 | 2016-06-08 | 珠海格力电器股份有限公司 | Driving signal anti-collision protection device, air conditioning system and control method |
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- 2016-01-27 CN CN201620083210.6U patent/CN205534492U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650328A (en) * | 2016-01-27 | 2016-06-08 | 珠海格力电器股份有限公司 | Driving signal anti-collision protection device, air conditioning system and control method |
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Granted publication date: 20160831 Effective date of abandoning: 20181102 |