CN102937791A - Efficient multiplex circuit and control method of air-conditioner - Google Patents
Efficient multiplex circuit and control method of air-conditioner Download PDFInfo
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- CN102937791A CN102937791A CN2012104163418A CN201210416341A CN102937791A CN 102937791 A CN102937791 A CN 102937791A CN 2012104163418 A CN2012104163418 A CN 2012104163418A CN 201210416341 A CN201210416341 A CN 201210416341A CN 102937791 A CN102937791 A CN 102937791A
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Abstract
The invention relates to an efficient multiplex circuit and a control method of an air-conditioner. The efficient multiplex circuit comprises a memory chip, a connection terminal, an MCU (Microprogrammed Control Unit) and a driver chip, wherein the I/O (Input/Output) port of the MCU is respectively connected with the input port of the driver chip; the output port of the driver chip is respectively connected with the port of the connection terminal of an external stepping motor; the other end of the connection terminal is connected to a power supply; one pin of the driver chip is grounded, and the other pin of the driver chip is connected to the power supply; a decoupling capacitor is connected between the two pins; the pins A0, A1, A2, GND and WP of the memory chip are grounded; the pin VCC of the memory chip is connected to the power supply; the I/O port of the MCU is connected to the address input pin SCL of the memory chip, and the other I/O port of the MCU is connected to the bidirectional serial data pin SDA of the memory chip; the address input pin SCL and the bidirectional serial data pin SDA of the memory chip are respectively accessed to a pull-up resistor; and the pins VCC and WP of the memory chip are connected with a ceramic capacitor in parallel. According to the efficient multiplex circuit and the control method of the air-conditioner, the design difficulty of an electronic control PCB (Printed Circuit Board) is reduced, and the cost of an electronic control product is reduced.
Description
Technical field
The present invention relates to the technical field of air-conditioning, refer in particular to a kind of efficient multiplexing circuit and control method thereof of air conditioner.
Background technology
Because air-conditioning has good refrigeration, heats basic function, in the widespread use that obtains of household electrical appliance.Along with improving constantly of people's living standard, also more strong to the requirement of the subsidiary function of air-conditioning.Control can only swing up and down such as indoor apparatus of air conditioner wind direction in the past, and after air-conditioning increases the space wind function, indoor machine wind to can realize comprehensive about, up-down adjustment; Air-conditioning increases memory function, has a power failure suddenly at air-conditioning, and the air-conditioning microprocessor can be remembered the running status of air-conditioning, when air-conditioning send a telegram here, and the air-conditioning operation of starting shooting at once, and press the front running status continuation of air-conditioning outage and move.For air-conditioner control system; the design of electric-controlled plate product is increasingly stable; as increase new load; because the I/O number of pins quantitative limitation of MCU; usually can change other more MCU of multi-pipe pin resource; perhaps use the chip with serial input/parallel output function, such as the 74HC595 chip, with the I/O port of expansion MCU.
" saving energy and reduce the cost " design of each air-conditioning producer pay attention to day by day product, particularly family expenses divide the series air-conditioning to occupy larger share in whole domestic air conditioning selling market, and the control of the stability of product quality and cost is particularly important.If air conditioner is changed MCU, be unfavorable for the control of automatically controlled product quality; If increase the chip of expansion I/O port, be unfavorable for the control of automatically controlled cost of products.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, do not increasing under the air conditioner electric control plate cost prerequisite, a kind of efficient multiplexing circuit and control method thereof of air conditioner is provided, efficient memory, the space wind subsidiary function of realizing.
For achieving the above object, the efficient multiplexing circuit of its air conditioner of technical scheme provided by the present invention, include memory chip, splicing ear, micro-control unit MCU, drive chip, wherein, the I/O port of described micro-control unit MCU respectively with corresponding the joining of input port that drives chip, the output port of this driving chip respectively with corresponding joining of port of splicing ear, simultaneously, the another port of this splicing ear connects power supply, the external stepper motor of this splicing ear; One pin ground connection of described driving chip, the one pin connects power supply, simultaneously, is connected with decoupling capacitor between this two pin; The A0 of described memory chip, A1, A2, GND, WP pin ground connection, its VCC pin connects power supply, the I/O port of micro-control unit MCU connects the address input pin SCL of memory chip, one I/O port connects the bidirectional linked list data pins SDA of memory chip, and, the address input pin SCL of this memory chip and bidirectional linked list data pins SDA adopt the fault-tolerant interleaved mode to separate the I/O port of access micro-control unit MCU, simultaneously, address input pin SCL and the bidirectional linked list data pins SDA of this memory chip access respectively pull-up resistor, the VCC of this memory chip and WP pin ceramic disc capacitor in parallel.
The bidirectional linked list data pins SDA of described memory chip is according to the specific work schedule the transmission of data of its address input pin SCL.
Described memory chip is the E2PROM of a serial CMOS.
The working method of described stepper motor is four phase eight beat.
Described splicing ear is five core splicing ears.
The control method of efficient multiplexing circuit of the present invention is as follows: air-conditioning is under start or holding state, the I/O port of micro-control unit MCU is set to output mode, memory chip is set to write operation, when micro-control unit MCU receives correct remote signal and check code, then effective remote control mode time-delay is write in the designating unit of memory chip, when air-conditioning is sent a telegram here, the above-mentioned I/O port of micro-control unit MCU is set to input pattern, memory chip is set to read operation, read at once the data in the memory chip, then according to institute's read data air conditioner is controlled; During the control of air-conditioning space wind, the I/O port of micro-control unit MCU transmits control signal, the angle of air door operation in the square wave quantity of this control signal determines, the speed that air door rotated in the frequency of operation of this control signal determined, the winding A of this control signal control step motor, B, C, the rotating of air door in D four is conducted and sequentially determines, its winding conducting sequentially is A-AB-B-BC-C-CD-D-DA during the stepper motor forward, its winding conducting sequentially is A-AD-D-DC-C-CB-B-BA during the stepper motor counter-rotating, this stepper motor working method is called for short the four phase eight beat operation, stepper motor swings by air door in the method for operation control of four phase eight beat, at this moment, in conjunction with swinging up and down of outer air door, can realize the space wind function of air-conditioning.
The present invention is after having adopted such scheme, its great advantage is that the efficient multiplexing circuit of this air conditioner adopts the I/O port of E2PROM control pin and the multiplexing micro-control unit MCU of step motor control pin fault-tolerant interleaved mode, saved the I/O port of micro-control unit MCU, electric-controlled plate is when newly-increased load like this, neither need to change the micro-control unit MCU of more resources, guaranteed the total quality of automatically controlled product, also need not increase the modular circuit of expansion I/O port, reduce the design difficulty of automatically controlled PCB, reduced the cost of automatically controlled product.
Description of drawings
Fig. 1 is the efficient multiplexing circuit theory diagrams of air conditioner of the present invention.
Embodiment
The invention will be further described below in conjunction with specific embodiment.
Shown in accompanying drawing 1, the efficient multiplexing circuit of the described air conditioner of the present embodiment, it includes memory chip IC2 24C02, splicing ear CNM1, micro-control unit MCU, drive chip IC 1 2003, wherein, described splicing ear CNM1 is five core splicing ears, the I/O port P02-P05 of micro-control unit MCU is connected with driving chip IC 1 2003 input port 1-4 respectively, the port one-4 that drives chip IC 1 2003 is corresponding one by one with the I/O relation of its port one 6-13, the output port 13-16 that drives chip IC 1 2003 connects respectively the A of splicing ear CNM1, B, C, the D end, the E end connection+12V power supply of splicing ear CNM1, the external working method of splicing ear CNM1 is the stepper motor of four phase eight beat; Drive 8 pin ground connection GND of chip IC 1 2003,9 pins that drive chip IC 1 2003 connect+the 12V power supply, connect decoupling capacitor C3 between 8,9 pins of driving chip IC 1 2003; Described memory chip IC2 24C02 is the E2PROM of a serial CMOS, its A0, A1, A2, GND, WP pin ground connection GND, its VCC pin connection+5V power supply, the I/O port P04 of micro-control unit MCU connects the address input pin SCL of memory chip IC2 24C02, the I/O port P02 of micro-control unit MCU connects the bidirectional linked list data pins SDA of memory chip IC2 24C02, the bidirectional linked list data pins SDA of memory chip IC2 24C02 is according to the specific work schedule the transmission of data of its address input pin SCL, in addition, because address input pin SCL and the bidirectional linked list data pins SDA of memory chip IC2 24C02 are open-drain, so need to access respectively pull-up resistor R90, R91, to determine the frequency of operation of memory chip IC2 24C02, in addition, the VCC of this memory chip IC2 24C02 ceramic disc capacitor C2 in parallel with the WP pin plays the voltage regulation filtering effect.
Below be the control method of the efficient multiplexing circuit of the above-mentioned air conditioner of the present embodiment: air-conditioning is under start or holding state, the I/O port P02 of micro-control unit MCU is set to output mode, memory chip IC2 24C02 is set to write operation, when micro-control unit MCU receives correct remote signal and check code, then effective remote control mode time-delay was write in the designating unit of memory chip IC2 24C02 in 3 seconds, the remote control mode time-delay write memory chip IC2 24C02 in 3 seconds, avoided the write operation continually to memory chip IC2 24C02, prolonged the serviceable life of memory chip IC2 24C02, when air-conditioning is sent a telegram here, the I/O port P02 of micro-control unit MCU is set to input pattern, memory chip IC2 24C02 is set to read operation, read at once the data among the memory chip IC2 24C02, then according to institute's read data air conditioner is controlled; During the control of air-conditioning space wind, the I/O port of micro-control unit MCU transmits control signal, the angle of air door operation in the square wave quantity of this control signal determines, the speed that air door rotated in the frequency of operation of this control signal determined, the winding A of this control signal control step motor, B, C, the rotating of air door in D four is conducted and sequentially determines, its winding conducting sequentially is A-AB-B-BC-C-CD-D-DA during the stepper motor forward, its winding conducting sequentially is A-AD-D-DC-C-CB-B-BA during the stepper motor counter-rotating, this stepper motor working method is called for short the four phase eight beat operation, stepper motor swings by air door in the method for operation control of four phase eight beat, at this moment, in conjunction with swinging up and down of outer air door, can realize the space wind function of air-conditioning.
Although the I/O port of the control pin multiplexing micro-control unit MCU of the control pin of stepper motor and memory chip IC2 24C02, but can be to the data verification, so the step motor control signal can not disturb memory chip IC2 24C02 read-write operation during owing to memory chip IC2 24C02 read-write operation.Stepper motor is different from the frequency of operation grade of memory chip IC2 24C02, the address input pin SCL of memory chip IC2 24C02 and bidirectional linked list data pins SDA adopt specific fault-tolerant interleaved mode to separate the I/O port of the micro-control unit MCU of Access Control stepper motor action, air-conditioning is in operational process, greatly reduced step out of stepping motor, shake probability, reduced behind the stepper motor long-play in the error of air door angle control.
The examples of implementation of the above only are the present invention's preferred embodiment, are not to limit practical range of the present invention with this, therefore the variation that all shapes according to the present invention, principle are done all should be encompassed in protection scope of the present invention.
Claims (6)
1. the efficient multiplexing circuit of an air conditioner, it is characterized in that: it includes memory chip (IC2 24C02), splicing ear (CNM1), micro-control unit MCU, drive chip (IC1 2003), wherein, the I/O port of described micro-control unit MCU respectively with corresponding the joining of input port that drives chip (IC1 2003), the output port of this driving chip (IC1 2003) respectively with corresponding joining of port of splicing ear (CNM1), simultaneously, the another port of this splicing ear (CNM1) connects power supply, the external stepper motor of this splicing ear (CNM1); One pin ground connection (GND) of described driving chip (IC1 2003), the one pin connects power supply, simultaneously, is connected with decoupling capacitor (C3) between this two pin; The A0 of described memory chip (IC2 24C02), A1, A2, GND, WP pin ground connection (GND), its VCC pin connects power supply, the I/O port of micro-control unit MCU connects the address input pin SCL of memory chip (IC2 24C02), one I/O port connects the bidirectional linked list data pins SDA of memory chip (IC2 24C02), and, the address input pin SCL of this memory chip (IC2 24C02) and bidirectional linked list data pins SDA adopt the fault-tolerant interleaved mode to separate the I/O port of access micro-control unit MCU, simultaneously, address input pin SCL and the bidirectional linked list data pins SDA of this memory chip (IC2 24C02) access respectively pull-up resistor (R90, R91), the VCC of this memory chip (IC2 24C02) and WP pin ceramic disc capacitor (C2) in parallel.
2. the efficient multiplexing circuit of a kind of air conditioner according to claim 1, it is characterized in that: the bidirectional linked list data pins SDA of described memory chip (IC2 24C02) is according to the specific work schedule the transmission of data of its address input pin SCL.
3. the efficient multiplexing circuit of a kind of air conditioner according to claim 1 and 2, it is characterized in that: described memory chip (IC2 24C02) is the E2PROM of a serial CMOS.
4. the efficient multiplexing circuit of a kind of air conditioner according to claim 1, it is characterized in that: the working method of described stepper motor is four phase eight beat.
5. the efficient multiplexing circuit of a kind of air conditioner according to claim 1, it is characterized in that: described splicing ear (CNM1) is five core splicing ears.
6. the control method of the efficient multiplexing circuit of the described air conditioner of claim 1, it is characterized in that: air-conditioning is under start or holding state, the I/O port of micro-control unit MCU is set to output mode, memory chip (IC2 24C02) is set to write operation, when micro-control unit MCU receives correct remote signal and check code, then effective remote control mode time-delay is write in the designating unit of memory chip (IC2 24C02), when air-conditioning is sent a telegram here, the above-mentioned I/O port of micro-control unit MCU is set to input pattern, memory chip (IC2 24C02) is set to read operation, read at once the data in the memory chip (IC2 24C02), then according to institute's read data air conditioner is controlled; During the control of air-conditioning space wind, the I/O port of micro-control unit MCU transmits control signal, the angle of air door operation in the square wave quantity of this control signal determines, the speed that air door rotated in the frequency of operation of this control signal determined, the winding A of this control signal control step motor, B, C, the rotating of air door in D four is conducted and sequentially determines, its winding conducting sequentially is A-AB-B-BC-C-CD-D-DA during the stepper motor forward, its winding conducting sequentially is A-AD-D-DC-C-CB-B-BA during the stepper motor counter-rotating, this stepper motor working method is called for short the four phase eight beat operation, stepper motor swings by air door in the method for operation control of four phase eight beat, at this moment, in conjunction with swinging up and down of outer air door, can realize the space wind function of air-conditioning.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104163418A CN102937791A (en) | 2012-10-26 | 2012-10-26 | Efficient multiplex circuit and control method of air-conditioner |
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| CN2012104163418A CN102937791A (en) | 2012-10-26 | 2012-10-26 | Efficient multiplex circuit and control method of air-conditioner |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104714454A (en) * | 2015-03-12 | 2015-06-17 | 深圳市华星光电技术有限公司 | Chip pin multiplexing method and system |
| CN107659476A (en) * | 2017-10-09 | 2018-02-02 | 珠海格力电器股份有限公司 | A kind of telecommunication circuit |
| CN109558350A (en) * | 2018-11-20 | 2019-04-02 | 海信（山东）空调有限公司 | A kind of program monitoring multiplexing port, control method and household electrical appliance |
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Patent Citations (6)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104714454A (en) * | 2015-03-12 | 2015-06-17 | 深圳市华星光电技术有限公司 | Chip pin multiplexing method and system |
| CN107659476A (en) * | 2017-10-09 | 2018-02-02 | 珠海格力电器股份有限公司 | A kind of telecommunication circuit |
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| CN109558350A (en) * | 2018-11-20 | 2019-04-02 | 海信（山东）空调有限公司 | A kind of program monitoring multiplexing port, control method and household electrical appliance |
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Application publication date: 20130220 |