CN210688623U - Air conditioner and relay drive circuit - Google Patents
Air conditioner and relay drive circuit Download PDFInfo
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- CN210688623U CN210688623U CN201921375088.XU CN201921375088U CN210688623U CN 210688623 U CN210688623 U CN 210688623U CN 201921375088 U CN201921375088 U CN 201921375088U CN 210688623 U CN210688623 U CN 210688623U
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Abstract
The application discloses drive circuit of air conditioner and relay, wherein, the drive circuit of relay includes: a plurality of controllers for transmitting control signals; the processing circuits are connected with the controllers in a one-to-one correspondence mode, and generate driving signals according to control signals transmitted by the corresponding controllers; the relays are connected with the processing circuits and drive corresponding relays of the relays according to the driving signals of the processing circuits received by the processing circuits; and the switching power supply is connected with the power supply ends of the relays. According to the drive circuit of relay of this application, can not only realize the reduction of relay consumption through a plurality of controllers transmission control signal control relay, but also the cost of greatly reduced converter.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to an air conditioner and a driving circuit of a relay.
Background
In the frequency conversion controller, the transformer switch power supply can output a plurality of paths of voltages for different loads to use; in a BUCK switching power supply, the output voltage is typically set to 15V by driving all the loads of the controller with 1-way output. However, driving the relay directly by this voltage easily results in large power consumption; the voltage conversion circuit is added to realize the purpose, so that the cost of the frequency conversion controller is greatly increased and needs to be solved.
SUMMERY OF THE UTILITY MODEL
This application is through providing a drive circuit of air conditioner and relay, has solved among the prior art because control signal only has the height level for when switching power supply direct action relay, lead to the great technical problem of relay consumption, this application is through using PWM signal control relay, not only realizes the reduction of relay consumption, but also the cost of greatly reduced converter.
In order to achieve the above object, the present application provides a drive circuit of a relay, including: a plurality of controllers for transmitting control signals; the processing circuits are connected with the controllers in a one-to-one correspondence mode, and generate driving signals according to control signals transmitted by the corresponding controllers; the relays are connected with the processing circuits and drive corresponding relays of the relays according to the driving signals of the processing circuits received by the processing circuits; and the switching power supply is connected with the power supply ends of the plurality of relays.
Further, the above-mentioned drive circuit for a relay further includes: the first end of each inductor of the plurality of inductors is connected with the switching power supply, and the second end of each inductor is connected with a corresponding relay of the plurality of relays.
Further, the plurality of processing circuits comprises: a first end of the driving switch is connected with a corresponding relay in the plurality of relays, and a second end of the driving switch is grounded; a first end of the first resistor is connected with a third end of the driving switch, and a second end of the first resistor is connected with a corresponding controller in the plurality of controllers; and a first end of the second resistor is connected with a third end of the driving switch, and a second end of the second resistor is connected with an emitter connected with a second end of the driving switch.
Further, the driving switch is a triode or a Darlington tube.
Further, the plurality of processing circuits comprises: and the first output tube angle to the third output tube angle of the driving chip are connected with the plurality of relays in a one-to-one correspondence manner, and the fourth input tube angle to the sixth input tube angle of the driving chip are connected with the plurality of controllers in a one-to-one correspondence manner.
Further, the above-mentioned drive circuit for a relay further includes: a plurality of diodes connected in parallel with each of the plurality of relays, anodes of the plurality of diodes being connected to a corresponding one of the plurality of processing circuits, cathodes of the plurality of diodes being connected to the switching power supply.
Further, the above-mentioned drive circuit for a relay further includes: a plurality of load circuits, the turn-on and turn-off of which are controlled by corresponding relays and/or resistors among the plurality of relays.
Further, the resistor is a PTC thermistor.
Further, the control signal is a PWM waveform signal.
In order to achieve the above object, the present application provides an air conditioner including the above-described relay driving circuit.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
(1) in this application, through a plurality of controllers transmission control signal, and generate drive signal according to the control signal that corresponds the controller transmission through a plurality of processing circuit, and correspond the relay in the drive signal drive a plurality of relays of every processing circuit that receive according to a plurality of processing circuit through a plurality of relays, solved among the prior art because control signal only has the height level, make when switching power supply direct action relay, lead to the great technical problem of relay consumption, this application is through using PWM signal control relay, not only realize the reduction of relay consumption, but also the cost of greatly reduced converter.
(2) According to the embodiment of the application, the frequency of the PWM signal is further adjusted by adding the inductor between the output of the switching power supply and the relay, so that the power consumption of the relay is reduced.
Drawings
Fig. 1 is a schematic structural view of a driving apparatus of a related art relay;
fig. 2 is a block schematic diagram of a drive circuit of a relay according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a drive circuit of a relay according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a PWM waveform signal according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a drive circuit of a relay according to another embodiment of the present invention;
fig. 6 is a schematic configuration diagram of a drive circuit of a relay according to still another embodiment of the present invention;
fig. 7 is a schematic configuration diagram of a drive circuit of a relay according to still another embodiment of the present invention;
fig. 8 is a block diagram of an air conditioner according to an embodiment of the present invention.
Detailed Description
The control signal can be transmitted through the plurality of controllers, the driving signal is generated through the plurality of processing circuits according to the control signal transmitted by the corresponding controller, and the corresponding relay in the plurality of relays is driven through the plurality of relays according to the driving signal of each processing circuit received by the plurality of processing circuits. Therefore, voltage reduction of the voltage converter is not needed, and the relay is controlled by using the PWM signal, so that not only is the power consumption of the relay reduced, but also the cost of the frequency converter can be greatly reduced.
For a better understanding of the above technical solutions, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Before the air conditioner and the relay driving circuit according to the embodiment of the present application are introduced, a relay driving apparatus according to the related art will be briefly described.
As shown in fig. 1, the relay driving apparatus mainly includes: power U, relay 1, load circuit and processing circuit.
Wherein, power U only has the output of 15V all the way for the relay power supply, relay 1 control load circuit, and processing circuit can receive control signal to control the relay. The control signal can be a high level signal or a low level signal, when the control signal is at a high level, the Q1 is conducted, the contact of the relay is closed, and the relay works; when the voltage is low, Q1 is turned off, the relay contact is opened, and the relay stops operating.
However, because the output of the power supply U is only 15V, the power supply U directly drives the relay, which results in larger power consumption of the relay.
Therefore, the present application provides an air conditioner and a relay driving circuit based on the above problems.
The following describes a driving circuit of an air conditioner and a relay according to an embodiment of the present application with reference to the drawings.
Fig. 2 is a block schematic diagram of a drive circuit of a relay according to an embodiment of the present application. As shown in fig. 2, the relay drive circuit 10 includes: a switching power supply 100, a plurality of processing circuits 200, a plurality of relays, and a plurality of controllers.
Wherein the plurality of controllers are configured to transmit control signals (e.g., control signal 1, control signal 2, … …, control signal N). The plurality of processing circuits 200 are connected to the plurality of controllers in a one-to-one correspondence, and the plurality of processing circuits 200 generate driving signals according to control signals transmitted by the corresponding controllers 100. A plurality of relays (e.g., relays K1, relays K2, … …, relays KN) connected to the plurality of processing circuits 200 to drive corresponding ones of the plurality of relays according to the driving signal of each processing circuit received by the plurality of processing circuits 200; the switching power supply 100 is connected to the power supply terminals of the plurality of relays.
Wherein, according to an embodiment of the present application, the switching power supply 100 is grounded.
Optionally, according to an embodiment of the present application, the control signal may be a PWM waveform signal, where the control signals sent by the controllers may be the same or different, that is, waveforms of the control signal 1, the control signal 2, … …, and the control signal N in the same time period may be completely the same or different, and specifically may be controlled according to circuit requirements.
It is understood that, as shown in fig. 3, the embodiment of the present application may transmit the PWM waveform signal through a plurality of controllers, and convert the PWM waveform signal into the driving signal through a plurality of processing circuits 200 (e.g., processing circuit 201, processing circuit 202, … …, processing circuit 20N) to drive the corresponding relay of the plurality of relays according to the driving signal; the switching power supply 100 may output a first voltage, for example, the first voltage may be 15V to power the plurality of relays.
In addition, in one embodiment of the present application, when the duty ratio of the PWM waveform signal output waveform is greater than a preset duty ratio, the relay contact is closed; when the duty ratio of the PWM waveform signal output waveform is smaller than the preset duty ratio, the relay contact is closed; when the output waveform of the PWM waveform signal is a low level signal, the relay stops working.
The preset duty ratio may be a ratio between a pull-in voltage of the relay contact and a sustain voltage of the relay contact. That is, if the relay contact pull-in voltage is U1 and the relay contact maintaining voltage is U2, the preset duty ratio D is U1/U2.
Specifically, the embodiments of the present application may transmit the PWM waveform signal through a plurality of controllers, and assuming that the inductance of the coil in the relay is L0 and the resistance of the coil in the relay is R0, the PWM waveform frequency may be obtained through the following formula:
wherein, Tpwm<ατ，α≤1，
That is, the PWM waveform frequency may be obtained by a period of the PWM waveform, where the period of the PWM waveform is smaller than a product of a time constant and a preset constant, where the time constant is a ratio between a coil inductance of the relay and a coil resistance of the relay, and the preset constant may be a positive number equal to or smaller than 1.
Thus, with reference to fig. 3 and 4, the PWM waveform signal may be as shown in fig. 4, and the on/off of the relay may be controlled according to the PWM waveform signal:
during a first time t1, the duty ratio of the PWM waveform signal output waveform may be D1, where D1> D, and then during the first time t1, the relay contacts are closed and the relay starts to operate;
in the second time t2, the duty ratio of the PWM waveform signal output waveform may be D2, where D2< D, and in the first time t2, the relay maintains operation;
in a third time t3, the PWM waveform signal is a low level signal, the relay contact is opened, and the relay stops operating.
It should be noted that, within the fourth time t4 to the sixth time t6, the output waveform of the PWM waveform signal of the embodiment of the present application may be consistent with the waveforms within the first time t1 to the third time t3, and the controller outputs the PWM waveform signal cyclically and alternately to control the on/off of the relay, so as to solve the problem that only high and low level signals control the relay in the related art cause large power consumption of the relay, thereby effectively reducing the power consumption of the relay. Further, according to an embodiment of the present application, as shown in fig. 4, the driving circuit 10 of the relay further includes: a plurality of inductors (such as inductor L1, inductors L2, … …, and inductor Ln). Wherein a first terminal of each of the plurality of inductors is connected to the switching power supply 100 and a second terminal of each of the plurality of inductors is connected to a corresponding one of the plurality of relays.
It can be understood that, as shown in fig. 5, an inductor may be added between the switching power supply 100 and the relay to adjust the output frequency of the PWM waveform according to the inductor, so as to further reduce the loss of the relay.
That is, when calculating the period of the PWM waveform, the time constant varies due to the inductance in the circuit, and assuming that the inductance in the circuit is L1, the time constant can be calculated by the following formula:
it should be noted that the adjusted PWM waveform signal may be consistent with the PWM waveform signal in fig. 3, so as to effectively control the on/off of the relay, reduce the loss of the relay, and in order to avoid redundancy, detailed description is not repeated here. The multiple controllers can emit different PWM waveform signals, namely, the values of the inductors are changed, so that different control of multiple circuits is realized.
In addition, as shown in fig. 6, when the controller, the processing circuit, the relay, and the inductor are all one, the control method is consistent with the control method when a plurality of controllers, a plurality of processing circuits, a plurality of relays, and a plurality of inductors are present, so that the loss of the relay can be greatly reduced, and detailed description is not repeated here to avoid redundancy.
Further, according to an embodiment of the present application, the processing circuit includes: a drive switch, (e.g., transistor Q1, transistors Q2, … …, transistor QN), a first resistor, and a second resistor. The first end of the driving switch is connected with the corresponding relay in the plurality of relays, and the second end of the driving switch is grounded. The first end of the first resistor is connected with the third end of the driving switch, and the second end of the first resistor is connected with a corresponding controller in the plurality of controllers. The first end of the second resistor is connected with the base of the third end of the driving switch, and the second end of the second resistor is connected with the second end of the driving switch.
According to an embodiment of the present application, the driving switch is a triode or a darlington tube.
It is understood that, as shown in fig. 3, taking the NPN transistor as an example of the driving switch, the processing circuit may be composed of a transistor, a first resistor and a second resistor, and the second resistor is connected in parallel to an emitter of the transistor, wherein a value of the second resistor has a relationship with a signal level amplitude and a signal frequency from a previous stage circuit, for example, the second resistor may have a value between 1k and 10 k. The second resistor can enable a collector to be reversely connected with a leakage current path, and cut-off reliability of the collector is guaranteed. When the signal circuit is 0, the collector potential is equal to the supply voltage, and there is a leakage current flowing from the collector to the base, and if there is no parallel resistor, the leakage current may cause the triode to leave the cut-off region and enter a wrong conduction state. Therefore, the leakage current can be led to the ground through the second resistor, and the cut-off reliability is effectively improved.
In addition, the control mode when the driving switch is a darlington tube is consistent with the control mode when the driving switch is a triode, and detailed description is omitted here to avoid redundancy.
Further, according to an embodiment of the present application, the plurality of processing circuits includes: and the fourth input tube angle to the sixth input tube angle of the driving chip are connected with the plurality of controllers in a one-to-one correspondence manner.
It can be understood that, as shown in fig. 7, the driving chip may be an ULN2003, the fourth to sixth input tube corners of the driving chip may receive the control signal sent by the controller, and the first to third output tube corners of the driving chip are connected to the plurality of relays in a one-to-one correspondence, so as to drive the relays after converting the control signal into the driving signal.
Further, according to an embodiment of the present application, the driving circuit of the relay further includes: and the plurality of diodes are correspondingly connected with each relay in the plurality of relays in parallel, the anodes of the plurality of diodes are connected with the corresponding processing circuit in the plurality of processing circuits, and the cathodes of the plurality of diodes are connected with the switching power supply.
It can be understood that because the back emf that produces when direct current relay breaks off causes the influence or components and parts damage to the circuit, consequently, can reverse parallel connection a diode on the relay, give a return circuit of back emf to it is damage driver or other components and parts to effectively prevent that the coil from switching on or off the electricity induction is electronic, effectively improves the security of circuit.
Further, according to an embodiment of the present application, the driving circuit 10 of the relay further includes: and a plurality of load circuits, the on and off of which are controlled by corresponding relays and/or resistors among the plurality of relays.
Specifically, the plurality of load circuits may be controlled by the relay alone or by both the relay and the resistor, wherein the resistor may be a PTC thermistor.
According to the drive circuit of relay that this application embodiment provided, can launch control signal through a plurality of controllers, and through a plurality of processing circuits according to the control signal generation drive signal that corresponds the controller transmission, and correspond the relay in the drive signal drive a plurality of relays of every processing circuit that a plurality of relays received according to a plurality of processing circuits, because control signal only has the height level among the prior art has been solved, make when switching power supply direct action relay, lead to the great technical problem of relay consumption, through using PWM signal control relay, not only need not voltage converter step-down, and realize the reduction of relay consumption, the cost of converter that can also greatly reduced.
As shown in fig. 8, the present embodiment further provides an air conditioner 20, where the air conditioner 20 includes the above-mentioned relay driving circuit 10.
According to the air conditioner that this application embodiment provided, can through a plurality of controllers transmission control signal, and through a plurality of processing circuit according to the control signal generation drive signal that corresponds the controller transmission, and correspond the relay in the drive signal drive a plurality of relays of every processing circuit that a plurality of relays receive according to a plurality of processing circuit, because control signal only has high low level among the prior art has been solved, make when switching power supply direct action relay, lead to the great technical problem of relay consumption, through using PWM signal control relay, not only need not voltage converter step-down, and realize the reduction of relay consumption, the cost that can also greatly reduced the converter.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A drive circuit for a relay, comprising:
a plurality of controllers for transmitting control signals;
the processing circuits are connected with the controllers in a one-to-one correspondence mode, and generate driving signals according to control signals transmitted by the corresponding controllers;
the relays are connected with the processing circuits and drive corresponding relays of the relays according to the driving signals of the processing circuits received by the processing circuits; and
and the switching power supply is connected with the power supply ends of the plurality of relays.
2. The relay drive circuit according to claim 1, further comprising:
the first end of each inductor of the plurality of inductors is connected with the switching power supply, and the second end of each inductor is connected with a corresponding relay of the plurality of relays.
3. The relay drive circuit according to claim 1, wherein the plurality of processing circuits includes:
a first end of the driving switch is connected with a corresponding relay in the plurality of relays, and a second end of the driving switch is grounded;
a first end of the first resistor is connected with a third end of the driving switch, and a second end of the first resistor is connected with a corresponding controller in the plurality of controllers;
and a first end of the second resistor is connected with a third end of the driving switch, and a second end of the second resistor is connected with a second end of the driving switch.
4. The relay driver circuit according to claim 3, wherein the driver switch is a transistor or a Darlington transistor.
5. The relay drive circuit according to claim 1, wherein the plurality of processing circuits includes:
and the first output tube angle to the third output tube angle of the driving chip are connected with the plurality of relays in a one-to-one correspondence manner, and the fourth input tube angle to the sixth input tube angle of the driving chip are connected with the plurality of controllers in a one-to-one correspondence manner.
6. The relay drive circuit according to claim 1, further comprising:
a plurality of diodes connected in parallel with each of the plurality of relays, anodes of the plurality of diodes being connected to a corresponding one of the plurality of processing circuits, cathodes of the plurality of diodes being connected to the switching power supply.
7. The relay drive circuit according to claim 1, further comprising:
a plurality of load circuits, the turn-on and turn-off of which are controlled by corresponding relays and/or resistors among the plurality of relays.
8. The relay drive circuit according to claim 7, wherein the resistor is a PTC thermistor.
9. The relay drive circuit according to claim 1, wherein the control signal is a PWM waveform signal.
10. An air conditioner characterized by comprising a drive circuit of the relay according to any one of claims 1 to 9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018221688903 | 2018-12-20 | ||
| CN201822168890 | 2018-12-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210688623U true CN210688623U (en) | 2020-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921375088.XU Active CN210688623U (en) | 2018-12-20 | 2019-08-22 | Air conditioner and relay drive circuit |
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|---|---|
| CN (1) | CN210688623U (en) |
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- 2019-08-22 CN CN201921375088.XU patent/CN210688623U/en active Active
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