CN218850003U - Serial port connecting structure - Google Patents
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- CN218850003U CN218850003U CN202222812880.5U CN202222812880U CN218850003U CN 218850003 U CN218850003 U CN 218850003U CN 202222812880 U CN202222812880 U CN 202222812880U CN 218850003 U CN218850003 U CN 218850003U
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Abstract
The application belongs to the technical field of air conditioners, and discloses a serial port connection structure which comprises at least two compressor drive boards, at least two fan drive boards and a control main board; the compressor driving board and the fan driving board are in communication connection with the same serial port of the control mainboard through a first connecting seat and a second connecting seat respectively; the first connecting seat and the second connecting seat comprise at least one address terminal, each address terminal is grounded or connected with a VCC power supply, the compressor driving plate and the fan driving plate comprise at least one optocoupler, and the optocouplers are connected with each address terminal and output different level signals according to the level of the address terminals; therefore, each driving board can determine respective address according to the level signal output by each optical coupler to communicate with the control mainboard, an RS485 chip is not required to be arranged, and communication connection with a plurality of driving boards can be realized only by one serial port, so that cost reduction and serial port resource saving are facilitated.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to a serial port connection structure.
Background
A multi-split air conditioner generally includes a plurality of compressor modules (outdoor units), a plurality of fan modules (indoor units), and a control main board; every compressor module and every fan module all have the drive plate, every drive plate all with control mainboard communication connection to control each compressor module and each fan module by the control mainboard.
At present, the control mainboard and each drive board are generally in communication connection by using an RS485 bus, so that the unique address of a slave node is determined by a dialing selection mode at one side of the drive board, and an RS485 chip is required to be arranged in the mode, so that the cost is high; or a serial port is arranged on each drive board on the control mainboard, and each drive board is connected with the control mainboard through the corresponding serial port respectively, so that a physical address is not needed, and more serial port resources are occupied by the mode.
Thus, the prior art is in need of improvement and advancement.
SUMMERY OF THE UTILITY MODEL
An object of this application is to provide a serial ports connection structure, is favorable to reduce cost and saving serial ports resource.
The application provides a serial port connection structure which comprises at least two compressor driving boards, at least two fan driving boards and a control main board;
the control main board is provided with a first connecting seat corresponding to each compressor driving board, a second connecting seat corresponding to each fan driving board, and all the first connecting seats and all the second connecting seats are electrically connected with the same serial port; the first connecting seat and the second connecting seat comprise at least one address terminal, and each address terminal is connected with a VCC power supply or grounded; at least one pair of address terminals corresponding to any two first connecting seats is respectively grounded and connected with a VCC power supply; at least one pair of address terminals corresponding to each other between any two second connecting seats is respectively grounded and connected with a VCC power supply;
the compressor driving board comprises a third connecting seat and at least one first optical coupler, the third connecting seat is matched with the first connecting seat, the compressor driving board is in communication connection with the serial port through the third connecting seat and the first connecting seat, the anode of each first optical coupler is connected with each address terminal of the first connecting seat through the third connecting seat, the cathode of each first optical coupler is grounded, the collector of each first optical coupler is connected with a reference voltage, and the emitter of each first optical coupler is used for outputting a level signal;
the fan driving board comprises a fourth connecting seat and at least one second optical coupler, the fourth connecting seat is matched with the second connecting seat, the fan driving board is in communication connection with the serial port through the fourth connecting seat and the second connecting seat, the anode of each second optical coupler is connected with each address terminal of the second connecting seat through the fourth connecting seat, the cathode of each second optical coupler is grounded, the collector of each second optical coupler is connected with a reference voltage, and the emitter of each second optical coupler is used for outputting a level signal.
When the address terminal connected with the first optical coupler of the compressor driving board is grounded, the first optical coupler is not conducted, so that an emitter of the first optical coupler outputs a low level; at least one pair of address terminals corresponding to any two first connecting seats are respectively grounded and connected with a VCC power supply, so that the level high-low combinations output by all the first optical couplers of each compressor driving plate are different, and each combination can represent an address, therefore, each compressor driving plate can determine the address according to the level high-low combinations output by all the first optical couplers; similarly, each fan driving board can determine the address of the fan driving board according to the level combination output by all the second optical couplers; when the intelligent control system works, the control mainboard can access each drive board in a polling mode, so that each drive board can perform information interaction with the control mainboard when judging that the control mainboard polls to the driver according to the address of the driver; this serial ports connection structure need not to set up thereby reduce cost of RS485 chip, and only needs a serial ports can realize with the communication connection of a plurality of drive plates, practices thrift serial resources, in addition, owing to confirm the address through the physics mode of connecting wire, can avoid the artifical operation that sets up the address, convenient to use.
In some embodiments, there are two each of the compressor drive plate and the fan drive plate; the second connecting seat with first connecting seat all is provided with one address terminal, two first connecting seat address terminal ground connection respectively and with VCC power connection, two the second connecting seat address terminal ground connection respectively and with VCC power connection.
Preferably, a protection resistor is disposed between the address terminal and a ground terminal or a VCC power supply connected thereto.
Therefore, the first optocoupler and the second optocoupler are prevented from being damaged due to overlarge anode input current of the first optocoupler and the second optocoupler.
Preferably, the total number of terminals of the first and second connection holders is different.
Thereby avoid being connected compressor drive plate and fan drive plate with wrong connecting seat, play the mistake proofing effect of inserting.
Preferably, the sending end of the compressor driving plate is connected with the receiving end of the serial port through the third connecting seat and the first connecting seat, and the receiving end of the compressor driving plate is connected with the sending end of the serial port through the third connecting seat and the first connecting seat.
Furthermore, a third optocoupler is connected between the sending end of the compressor driving plate and the third connecting seat, and a fourth optocoupler is connected between the receiving end of the compressor driving plate and the third connecting seat.
Further, the first connection seat comprises a power supply terminal connected with a VCC power supply and a grounding terminal grounded;
the anode of the third optocoupler is connected with a reference voltage, the cathode of the third optocoupler is connected with the sending end of the compressor driving board, the collector of the third optocoupler is connected with the receiving end of the serial port through the third connecting seat and the first connecting seat, and the emitter of the third optocoupler is connected with the grounding terminal of the first connecting seat through the third connecting seat;
the positive pole of the fourth optical coupler is connected with the power supply terminal of the first connecting seat through the third connecting seat, the negative pole of the fourth optical coupler is connected with the sending end of the serial port through the third connecting seat and the first connecting seat, the collector of the fourth optical coupler is connected with reference voltage, and the emitter of the fourth optical coupler is connected with the receiving end of the compressor driving plate.
Preferably, the sending end of the fan driving board is connected with the receiving end of the serial port through the fourth connecting seat and the second connecting seat, and the receiving end of the fan driving board is connected with the sending end of the serial port through the fourth connecting seat and the second connecting seat.
Furthermore, a fifth optocoupler is connected between the sending end of the fan driving board and the fourth connecting seat, and a sixth optocoupler is connected between the receiving end of the fan driving board and the fourth connecting seat.
Further, the second connection holder includes a power supply terminal connected to a VCC power supply and a ground terminal connected to ground;
an anode of the fifth optical coupler is connected with a reference voltage, a cathode of the fifth optical coupler is connected with a sending end of the fan driving board, a collector of the fifth optical coupler is connected with a receiving end of the serial port through the fourth connecting seat and the second connecting seat, and an emitter of the fifth optical coupler is connected with the grounding terminal of the second connecting seat through the fourth connecting seat;
the anode of the sixth optical coupler is connected with the power supply terminal of the second connecting seat through the fourth connecting seat, the cathode of the sixth optical coupler is connected with the sending end of the serial port through the fourth connecting seat and the second connecting seat, the collector of the sixth optical coupler is connected with a reference voltage, and the emitter of the sixth optical coupler is connected with the receiving end of the fan driving plate.
Has the advantages that:
according to the serial port connection structure provided by the application, each compressor driving plate can determine the address of each compressor according to the level combination output by all the first optical couplers, and each fan driving plate can determine the address of each fan according to the level combination output by all the second optical couplers; when the intelligent control system works, the control mainboard can access each drive board in a polling mode, so that each drive board can perform information interaction with the control mainboard when judging that the control mainboard polls to the driver according to the address of the driver; this serial ports connection structure need not to set up thereby reduce cost of RS485 chip, and only needs a serial ports can realize with the communication connection of a plurality of drive plates, practices thrift serial resources, in addition, owing to confirm the address through the physics mode of connecting wire, can avoid the artifical operation that sets up the address, convenient to use.
Drawings
Fig. 1 is a schematic structural diagram of a serial port connection structure provided in an embodiment of the present application.
Fig. 2 is a schematic view of a compressor drive plate.
Fig. 3 is a schematic view of another compressor drive plate configuration.
Fig. 4 is a schematic structural view of a fan driving board.
Fig. 5 is a schematic structural diagram of another fan drive plate.
Fig. 6 is a schematic structural diagram of the control motherboard.
Description of reference numerals: 11. a compressor drive plate; 12. a fan drive plate; 13. a control main board; 14. a first connecting seat; 15. a second connecting seat; 16. a serial port; 17. an address terminal; 18. a third connecting seat; 19. a first optical coupler; 20. a fourth connecting seat; 21. a second optocoupler; 22. a protection resistor; 23. a third optocoupler; 24. a fourth optical coupler; 25. a fifth optocoupler; 26. a sixth optocoupler; 27. a current limiting resistor; 28. and a voltage dividing resistor.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Referring to fig. 1 to 6, a serial port connection structure in some embodiments of the present application includes at least two compressor driving boards 11 (i.e., driving boards of compressor modules), at least two fan driving boards 12 (i.e., driving boards of fan modules), and a control motherboard 13;
a first connecting seat 14 is arranged on the control mainboard 13 corresponding to each compressor driving plate 11, a second connecting seat 15 is arranged corresponding to each fan driving plate 12, and all the first connecting seats 14 and all the second connecting seats 15 are electrically connected with the same serial port 16; the first connecting seat 14 and the second connecting seat 15 both include at least one address terminal 17, and each address terminal 17 is connected to a VCC (Volt Current connector) power supply or grounded; at least one pair of address terminals 17 corresponding to each other between any two first connection bases 14 is grounded and connected with a VCC power supply respectively; at least one pair of address terminals 17 corresponding to each other between any two second connecting sockets 15 is grounded and connected to the VCC power supply;
the compressor driving board 11 comprises a third connecting seat 18 matched with the first connecting seat 14 and at least one first optical coupler 19, the compressor driving board 11 is in communication connection with a serial port 16 through the third connecting seat 18 and the first connecting seat 14, the anode of each first optical coupler 19 is connected with each address terminal 17 of the first connecting seat 14 through the third connecting seat 18, the cathode of each first optical coupler 19 is grounded, the collector of each first optical coupler 19 is connected with a reference voltage (the reference voltage in the figure is 5V, but not limited thereto), and the emitter of each first optical coupler 19 is used for outputting a level signal;
When the address terminal 17 connected with the first optical coupler 19 of the compressor driving board 11 is grounded, the first optical coupler 19 is not conducted, so that the emitter thereof outputs a low level, and when the address terminal 17 connected with the first optical coupler 19 is connected with the VCC power supply, the first optical coupler 19 is conducted, so that the emitter thereof outputs a high level; because at least one pair of address terminals 17 corresponding to each other between any two first connection seats 14 is grounded and connected to the VCC power supply, so that the level combinations output by all the first optocouplers 19 of each compressor drive board 11 are different, and each combination can represent one address (for example, if the compressor drive board 11 includes two first optocouplers 19, and the compressor drive board 11 is provided with four, the level combinations of the four compressor drive boards 11 are [ high, high ], [ high, low ], [ low, high ], and each level combination represents an address a, b, c, and d, but not limited thereto), each compressor drive board 11 can determine its own address according to the level combination output by all the first optocouplers 19; similarly, each fan driving board 12 may determine its own address according to the level combination output by all the second optocouplers 21; when the intelligent control system works, the control mainboard 13 can access each drive board in a polling mode, so that each drive board can perform information interaction with the control mainboard 13 when judging that the control mainboard 13 polls to itself according to the address of the drive board; this serial ports connection structure need not to set up thereby reduce cost of RS485 chip, and only needs a serial ports 16 can realize with the communication connection of a plurality of drive plates, practices thrift serial resources, in addition, owing to confirm the address through the physics line mode, can avoid the artifical operation that sets up the address, convenient to use.
The pair of address terminals 17 corresponding to any two first connection sockets 14 refers to two address terminals 17 with the same serial number in the two first connection sockets 14; for example, in fig. 3, the first connection seat 14 has two address terminals 17, and the two address terminals 17 are respectively the No. 5 terminal and the No. 6 terminal of the first connection seat 14, so that the two No. 5 terminals of any two first connection seats 14 are a pair of address terminals 17 corresponding to each other, and the two No. 6 terminals of any two first connection seats 14 are a pair of address terminals 17 corresponding to each other; if at least one pair of address terminals 17 of the two pairs of address terminals 17 are connected to different terminals (ground terminals or VCC power supplies), the level combinations of the two corresponding compressor driving boards 11 will be different, and the addresses will be different (for example, if the terminals 5 of the two first connecting sockets 14 are both grounded, but the terminal 6 is grounded and connected to the VCC power supply, the corresponding level combinations are [ low, low ] and [ low, high ], and the addresses are c and d, respectively).
It should be noted that, because the fan drive plate 12 and the compressor drive plate 11 are different in device type, different default addresses are pre-allocated to different device types, the default addresses of all the fan drive plates 12 are the same, the default addresses of all the compressor drive plates 11 are the same, the drive plates can combine the default addresses and addresses determined by level combination to form effective addresses, and then communicate with the control main board 13 according to the effective addresses, so that when the fan drive plate 12 and the compressor drive plate 11 have the same level combination, the effective addresses are also different. For example, the default address of the compressor driving board 11 is 1, the default address of the fan driving board 12 is 2 (but not limited thereto), and assuming that the addresses determined by the level combination of the one compressor driving board 11 and the one fan driving board 12 are both a, the effective address of the compressor driving board 11 is 1a, and the effective address of the fan driving board 12 is 2a, which are different.
The number of the compressor driving board 11 and the fan driving board 12 can be set according to actual needs, the number of the address terminals 17 of the second connecting base 15 and the first connecting base 14 is set according to the actual number of the compressor driving board 11 and the fan driving board 12, and generally, the following relationship is satisfied between the number n of the compressor driving board 11 and the fan driving board 12 and the number k of the address terminals 17 of the second connecting base 15 and the first connecting base 14: n is less than or equal to 2 to the power k.
For example, in some embodiments, as shown in fig. 1, 2, 4, two compressor drive plates 11 and two fan drive plates 12 are provided; the second connection holder 15 and the first connection holder 14 are provided with an address terminal 17, the address terminals 17 of the two first connection holders 14 are grounded and connected to the VCC power supply, respectively, and the address terminals 17 of the two second connection holders 15 are grounded and connected to the VCC power supply, respectively.
For example, in other embodiments, there are four each of the compressor drive plate 11 and the fan drive plate 12; the first connection seat 14 and the second connection seat 15 are both provided with two address terminals 17 (as shown in fig. 3 and fig. 5), wherein the two address terminals 17 of the first connection seat 14 are both connected with a VCC power supply, the two address terminals 17 of the second first connection seat 14 are respectively grounded and connected with the VCC power supply, the two address terminals 17 of the third first connection seat 14 are both grounded, and the two address terminals 17 of the fourth first connection seat 14 are respectively connected with the VCC power supply and grounded; wherein two address terminals 17 of the first second connecting seat 15 are all connected with the VCC power supply, two address terminals 17 of the second connecting seat 15 are respectively grounded and connected with the VCC power supply, two address terminals 17 of the third second connecting seat 15 are all grounded, and two address terminals 17 of the fourth second connecting seat 15 are respectively connected with the VCC power supply and grounded.
But the number of the second connection sockets 15 and the first connection sockets 14 and the connection object of each address terminal 17 are not limited thereto.
In some preferred embodiments, see fig. 2-5, a protection resistor 22 is provided between the address terminal 17 and the connected ground or VCC power supply. Therefore, the situation that the first optical coupler 19 and the second optical coupler 21 are damaged due to overlarge anode input current of the first optical coupler 19 and the second optical coupler 21 is avoided.
In some preferred embodiments, see fig. 2 and 4, the total number of terminals of the first and second connection holders 14 and 15 is different. Therefore, the compressor driving plate 11 and the fan driving plate 12 are prevented from being connected with wrong connecting seats, and the wrong insertion is prevented. For example, the first connecting socket 14 in fig. 2 has 5 terminals, and the second connecting socket 15 in fig. 4 has 6 terminals, so that the third connecting socket 18 has 5 terminals correspondingly, the fourth connecting socket 20 has 6 terminals correspondingly, the third connecting socket 18 can only be connected with the first connecting socket 14, and the fourth connecting socket 20 can only be connected with the second connecting socket 15.
In this embodiment, referring to fig. 1, 2 and 6, the transmitting end of the compressor driving board 11 is connected to the receiving end of the serial port 16 through the third connecting socket 18 and the first connecting socket 14, and the receiving end of the compressor driving board 11 is connected to the transmitting end of the serial port 16 through the third connecting socket 18 and the first connecting socket 14. Specifically, one of the terminals (terminal No. 3 in the drawing) of the first connecting socket 14 is connected to the receiving end of the serial port 16, and the terminal (terminal No. 3 of the third connecting socket 18) of the third connecting socket 18 for connection with the terminal of the first connecting socket 14 is connected to the transmitting end of the compressor driving plate 11; the other terminal (terminal No. 4 in the figure) is connected to the transmitting end of the serial port 16, and the terminal of the third connector holder 18 for connection to the terminal of the first connector holder 14 (i.e., terminal No. 4 of the third connector holder 18) is connected to the receiving end of the compressor driving plate 11.
Further, a third optocoupler 23 is connected between the sending end of the compressor driving plate 11 and the third connecting socket 18, and a fourth optocoupler 24 is connected between the receiving end of the compressor driving plate 11 and the third connecting socket 18. The third optocoupler 23 and the fourth optocoupler 24 can realize isolated communication between the compressor driving plate 11 and the control mainboard 13 so as to meet the related safety specification requirements.
Further, referring to fig. 2, 3 and 6, the first connecting socket 14 includes a power supply terminal (i.e., terminal No. 1 of the first connecting socket 14 in the drawing) connected to the VCC power supply and a ground terminal (i.e., terminal No. 2 of the first connecting socket 14 in the drawing) connected to ground;
an anode of the third optical coupler 23 is connected with a reference voltage, a cathode of the third optical coupler 23 is connected with a sending end of the compressor driving board 11, a collector of the third optical coupler 23 is connected with a receiving end of the serial port 16 through the third connecting seat 18 and the first connecting seat 14, and an emitter of the third optical coupler 23 is connected with a ground terminal of the first connecting seat 14 through the third connecting seat 18 (in the figure, in order to avoid messy line display, grounding symbols of an emitter of the third optical coupler 23, a cathode of the first optical coupler 19 and a terminal 2 of the first connecting seat 14 are respectively displayed, but actually, the emitter of the third optical coupler 23 and the cathode of the first optical coupler 19 are both connected to the terminal 2 of the first connecting seat 14);
an anode of the fourth optical coupler 24 is connected with a power supply terminal of the first connecting seat 14 through the third connecting seat 18, a cathode of the fourth optical coupler 24 is connected with a transmitting end of the serial port 16 through the third connecting seat 18 and the first connecting seat 14, a collector of the fourth optical coupler 24 is connected with a reference voltage, and an emitter of the fourth optical coupler 24 is connected with a receiving end of the compressor driving plate 11.
In this embodiment, referring to fig. 1, 4 and 6, the transmitting end of the fan driving board 12 is connected to the receiving end of the serial port 16 through the fourth connecting socket 20 and the second connecting socket 15, and the receiving end of the fan driving board 12 is connected to the transmitting end of the serial port 16 through the fourth connecting socket 20 and the second connecting socket 15. Specifically, one of the terminals (terminal No. 3 in the drawing) of the second connecting socket 15 is connected to the receiving end of the serial port 16, and the terminal (i.e., terminal No. 3 of the fourth connecting socket 20) of the fourth connecting socket 20 for connecting to the terminal of the second connecting socket 15 is connected to the transmitting end of the fan driving board 12; the other terminal (terminal No. 4 in the figure) is connected to the transmitting end of the serial port 16, and the terminal of the fourth connector holder 20 for connection to the terminal of the second connector holder 15 (i.e., terminal No. 4 of the fourth connector holder 20) is connected to the receiving end of the fan driving board 12.
Further, a fifth optocoupler 25 is connected between the transmitting end of the fan driving board 12 and the fourth connecting base 20, and a sixth optocoupler 26 is connected between the receiving end of the fan driving board 12 and the fourth connecting base 20. The fifth optocoupler 25 and the sixth optocoupler 26 can realize isolated communication between the fan driving board 12 and the control mainboard 13 so as to meet related safety specification requirements.
Further, referring to fig. 4, 5, and 6, the second connection holder 15 includes a power supply terminal (i.e., terminal No. 1 of the second connection holder 15 in the drawing) connected to the VCC power supply and a ground terminal (i.e., terminal No. 2 of the second connection holder 15 in the drawing) connected to ground;
an anode of the fifth optical coupler 25 is connected with a reference voltage, a cathode of the fifth optical coupler 25 is connected with a sending end of the fan driving board 12, a collector of the fifth optical coupler 25 is connected with a receiving end of the serial port 16 through the fourth connecting seat 20 and the second connecting seat 15, and an emitter of the fifth optical coupler 25 is connected with a grounding terminal of the second connecting seat 15 through the fourth connecting seat 20 (in the figure, in order to avoid messy line display, grounding symbols of an emitter of the fifth optical coupler 25, a cathode of the second optical coupler 21 and a No. 2 terminal of the second connecting seat 15 are respectively displayed, but actually, the emitter of the fifth optical coupler 25 and the cathode of the second optical coupler 21 are both connected to the No. 2 terminal of the second connecting seat 15);
an anode of the sixth optical coupler 26 is connected with a power supply terminal of the second connecting base 15 through the fourth connecting base 20, a cathode of the sixth optical coupler 26 is connected with a transmitting end of the serial port 16 through the fourth connecting base 20 and the second connecting base 15, a collector of the sixth optical coupler 26 is connected with a reference voltage, and an emitter of the sixth optical coupler 26 is connected with a receiving end of the fan driving plate 12.
In some preferred embodiments, referring to fig. 2 to 5, current limiting resistors 27 are disposed between the third optical coupler 23 and the transmitting end of the compressor driving board 11, between the fourth optical coupler 24 and the receiving end of the compressor driving board 11, at the transmitting end of the first optical coupler 19, between the fifth optical coupler 25 and the transmitting end of the fan driving board 12, between the sixth optical coupler 26 and the receiving end of the fan driving board 12, and at the transmitting end of the second optical coupler 21, so as to prevent the current of each optical coupler from being too large and being damaged.
Further, a voltage dividing resistor 28 is arranged between an emitter of the fourth optical coupler 24 and a ground terminal, between an emitter of the first optical coupler 19 and the ground terminal, between an emitter of the sixth optical coupler 26 and the ground terminal, and between an emitter of the second optical coupler 21 and the ground terminal, so as to avoid that the voltage of the emitter of the optical coupler is too high.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A serial port connecting structure comprises at least two compressor driving plates (11), at least two fan driving plates (12) and a control main board (13); it is characterized in that the preparation method is characterized in that,
a first connecting seat (14) is arranged on the control main board (13) corresponding to each compressor driving board (11), a second connecting seat (15) is arranged corresponding to each fan driving board (12), and all the first connecting seats (14) and all the second connecting seats (15) are electrically connected with the same serial port (16); the first connecting seat (14) and the second connecting seat (15) respectively comprise at least one address terminal (17), and each address terminal (17) is connected with a VCC power supply or grounded; at least one pair of address terminals (17) corresponding to each other between any two first connecting seats (14) is respectively grounded and connected with a VCC power supply; at least one pair of address terminals (17) corresponding to each other between any two second connecting seats (15) is respectively grounded and connected with a VCC power supply;
the compressor driving board (11) comprises a third connecting seat (18) and at least one first optical coupler (19), the third connecting seat (18) is matched with the first connecting seat (14), the compressor driving board (11) is in communication connection with the serial port (16) through the third connecting seat (18) and the first connecting seat (14), the anode of each first optical coupler (19) is connected with each address terminal (17) of the first connecting seat (14) through the third connecting seat (18), the cathode of each first optical coupler (19) is grounded, the collector of each first optical coupler (19) is connected with a reference voltage, and the emitter of each first optical coupler (19) is used for outputting a level signal;
the fan driving board (12) comprises a fourth connecting seat (20) and at least one second optical coupler (21), the fourth connecting seat (20) is matched with the second connecting seat (15), the fan driving board (12) is in communication connection with the serial port (16) through the fourth connecting seat (20) and the second connecting seat (15), the anode of each second optical coupler (21) is connected with each address terminal (17) of the second connecting seat (15) through the fourth connecting seat (20), the cathode of each second optical coupler (21) is grounded, the collector of each second optical coupler (21) is connected with a reference voltage, and the emitter of each second optical coupler (21) is used for outputting a level signal.
2. The serial connection structure according to claim 1, wherein there are two of the compressor drive plate (11) and the fan drive plate (12) each; second connecting seat (15) with first connecting seat (14) all are provided with one address terminal (17), two first connecting seat (14) address terminal (17) ground connection respectively and with VCC power connection, two second connecting seat (15) address terminal (17) ground connection respectively and with VCC power connection.
3. The serial port connection structure according to claim 1, wherein a protection resistor (22) is provided between the address terminal (17) and a ground terminal or a VCC power supply connected thereto.
4. The serial connection structure according to claim 1, wherein the total number of terminals of the first connection holder (14) and the second connection holder (15) is different.
5. The serial port connection structure according to claim 1, wherein a transmitting end of the compressor driving board (11) is connected to a receiving end of the serial port (16) through the third connection socket (18) and the first connection socket (14), and the receiving end of the compressor driving board (11) is connected to the transmitting end of the serial port (16) through the third connection socket (18) and the first connection socket (14).
6. The serial port connection structure according to claim 5, wherein a third optical coupler (23) is connected between the sending end of the compressor driving plate (11) and the third connecting seat (18), and a fourth optical coupler (24) is connected between the receiving end of the compressor driving plate (11) and the third connecting seat (18).
7. The serial connection structure of claim 6, wherein the first connector block (14) comprises a power supply terminal connected to a VCC power supply and a ground terminal connected to a ground;
the anode of the third optical coupler (23) is connected with a reference voltage, the cathode of the third optical coupler (23) is connected with the sending end of the compressor driving plate (11), the collector of the third optical coupler (23) is connected with the receiving end of the serial port (16) through the third connecting seat (18) and the first connecting seat (14), and the emitter of the third optical coupler (23) is connected with the ground terminal of the first connecting seat (14) through the third connecting seat (18);
the positive pole of fourth opto-coupler (24) passes through third connecting seat (18) with first connecting seat (14) the power supply terminal is connected, the negative pole of fourth opto-coupler (24) passes through third connecting seat (18) with first connecting seat (14) with the transmitting terminal of serial ports (16) is connected, the collecting electrode and the reference voltage of fourth opto-coupler (24) are connected, the projecting pole of fourth opto-coupler (24) with the receiving terminal of compressor drive plate (11) is connected.
8. The serial port connection structure according to claim 1, wherein a transmitting end of the fan driving board (12) is connected to a receiving end of the serial port (16) through the fourth connecting socket (20) and the second connecting socket (15), and the receiving end of the fan driving board (12) is connected to the transmitting end of the serial port (16) through the fourth connecting socket (20) and the second connecting socket (15).
9. The serial port connection structure of claim 8, wherein a fifth optical coupler (25) is connected between the sending end of the fan driving board (12) and the fourth connecting seat (20), and a sixth optical coupler (26) is connected between the receiving end of the fan driving board (12) and the fourth connecting seat (20).
10. The serial connection structure according to claim 9, wherein the second connection holder (15) includes a power supply terminal connected to a VCC power supply and a ground terminal connected to a ground;
the anode of the fifth optical coupler (25) is connected with a reference voltage, the cathode of the fifth optical coupler (25) is connected with the sending end of the fan driving board (12), the collector of the fifth optical coupler (25) is connected with the receiving end of the serial port (16) through the fourth connecting seat (20) and the second connecting seat (15), and the emitter of the fifth optical coupler (25) is connected with the grounding terminal of the second connecting seat (15) through the fourth connecting seat (20);
the positive pole of sixth opto-coupler (26) passes through fourth connecting seat (20) with second connecting seat (15) the power supply terminal is connected, the negative pole of sixth opto-coupler (26) passes through fourth connecting seat (20) with second connecting seat (15) with the transmitting terminal of serial ports (16) is connected, the collecting electrode and the reference voltage of sixth opto-coupler (26) are connected, the projecting pole of sixth opto-coupler (26) with the receiving terminal of fan drive plate (12) is connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222812880.5U CN218850003U (en) | 2022-10-25 | 2022-10-25 | Serial port connecting structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222812880.5U CN218850003U (en) | 2022-10-25 | 2022-10-25 | Serial port connecting structure |
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| CN218850003U true CN218850003U (en) | 2023-04-11 |
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| CN202222812880.5U Active CN218850003U (en) | 2022-10-25 | 2022-10-25 | Serial port connecting structure |
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| CN (1) | CN218850003U (en) |
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