CN203608083U - Control mainboard and electrical equipment - Google Patents
Control mainboard and electrical equipment Download PDFInfo
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- CN203608083U CN203608083U CN201320825429.5U CN201320825429U CN203608083U CN 203608083 U CN203608083 U CN 203608083U CN 201320825429 U CN201320825429 U CN 201320825429U CN 203608083 U CN203608083 U CN 203608083U
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Abstract
The utility model discloses a control mainboard and electrical equipment. The control mainboard comprises: a power input circuit which is connected with a power supply and used for converting an input voltage of the power supply into a first direct current of a first preset voltage value; an electronic element; and a voltage conversion circuit which is connected to between the power input circuit and the electronic element, and is used for converting the first direct current into a second direct current and enabling the second direct current to supply power to the electronic element, wherein the second direct current accords with the supply voltage of the electronic element. The control mainboard provided by the utility model solves the problems that the electromagnetic interference is severe and the risk of electric shock is big when a 220V alternating-current power supply is employed for supplying power to an air-conditioner controller in the prior art. The control mainboard reduces the electromagnetic interference, and the employed first direct current of the first preset voltage value is safe for power supply. Moreover, there is no risk of electric shock.
Description
Technical field
The utility model relates to electronic circuit field, in particular to one control mainboard and electric equipment.
Background technology
Existing air-conditioning control mainboard is for using 220V AC(to exchange) supply power mode of power supply, voltage is larger, has electric shock risk in security reliability; Meanwhile, the most operating voltage of electronic devices and components in control mainboard is less, convert practical application voltage to and need to use a large amount of devices, and a large amount of devices has more serious energy loss from the supply power voltage of 220V AC.
As shown in Figure 1, use 220V ac power supply method, 220V alternating current need to be converted to 12V direct current, then use 12V direct current to power for electronic devices and components, and can use 220V alternating current directly to control the load of 220V.Owing to using the ac power supply method of 220V, on air-conditioning control mainboard, there is direct voltage and alternating voltage simultaneously, will produce like this electromagnetic interference, thereby air-conditioning control mainboard is Electro Magnetic Compatibility to EMC() etc. measure and the device that reduces electromagnetic interference that will use of problem all can increase; In addition; the communication power supply that uses 220V, air-conditioning control mainboard is output as by the load of Control 220V AC power, due to the requirement of safe distance etc.; output circuit institute take up space and circuit brake all very large, can take a lot of spaces.
Use for air-conditioner controller in prior art the problem that 220V ac power supply electromagnetic interference is strong, get an electric shock and have a big risk, not yet propose at present effective solution.
Utility model content
Use for air-conditioner controller in correlation technique the problem that 220V ac power supply electromagnetic interference is strong, get an electric shock and have a big risk, effective solution is not yet proposed at present, for this reason, main purpose of the present utility model is to provide a kind of mainboard and electric equipment controlled, to address the above problem.
To achieve these goals, according to an aspect of the present utility model, provide a kind of control mainboard, this control mainboard comprises: power supply input circuit, is connected with power supply, for the input voltage of power supply being converted to the first direct current of the first predeterminated voltage value; Electronic devices and components; Voltage conversion circuit, is connected between power supply input circuit and electronic devices and components, for the first direct current being converted to the second direct current of the supply power voltage that meets electronic devices and components, uses the second direct current to power for electronic devices and components.
Further, power supply comprises: DC power supply; Power supply input circuit comprises: transforming circuit, transforming circuit is connected with DC power supply, for the initial direct current transformation processing of DC power supply input is obtained to the first direct current that voltage is the first predeterminated voltage value.
Further, power supply comprises: AC power; Power supply input circuit comprises: inverter circuit, inverter circuit is connected with AC power, for the alternating current inversion processing of AC power input is obtained to the first direct current that voltage is the first predeterminated voltage value.
Further, controlling mainboard also comprises: digital processing unit; Load control circuit, is connected with digital processing unit, and digital processing unit uses Digital Signals load control circuit output digital power system electric current.
Further, load control circuit comprises: the first resistance, the digital signal of the input input digital processing unit of the first resistance; The first electric capacity, the first end of the first electric capacity is inputted the second direct current, and the second end of the first electric capacity is connected with the output of the first resistance; Optical coupler, the first end of optical coupler is inputted the first direct current, the second end supplied with digital signal of optical coupler, the 3rd end output digital power system electric current of optical coupler, the 4th end ground connection of optical coupler; The first diode, the negative pole of the first diode is connected with the 3rd end of optical coupler, the second end ground connection of the first diode.
Further, controlling mainboard also comprises: analog processor; Current control circuit, current control circuit is connected with analog processor, and analog processor meets the simulation supply current of predetermined current scope by the output of analog signal control current control circuit.
Further, control mainboard and also comprise: filter circuit, filter circuit is connected with analog processor, obtains filtering signal for analog signal is carried out to filtering processing; Amplifying circuit, is connected with filter circuit, obtains simulating supply current for amplification filtering signal.
Further, filter circuit comprises: the second resistance, the first end input analog signal of the second resistance; The second electric capacity; The positive pole of the second electric capacity is connected with the second end of the second resistance, the minus earth of the second electric capacity; The 3rd electric capacity, the 3rd electric capacity is connected with the second Capacitance parallel connection; The second end of the second resistance is as the output output filtering signal of filter circuit.
Further, amplifying circuit comprises: the first operational amplifier, and the positive input of the first operational amplifier is connected with the output of filter circuit; The 3rd resistance, the first end of the 3rd resistance is connected with the negative input of the first operational amplifier, the second end ground connection of the 3rd resistance; The 4th resistance, the first end of the 4th resistance is connected with the output of the first operational amplifier; The second operational amplifier, the negative input of the second operational amplifier is connected with the second end of the 4th resistance, and the positive input of the second operational amplifier connects reference power supply; Triode, the base stage of triode is connected with the output of the second operational amplifier, and the emitter of triode is by the 5th resistance output simulation supply current, and the collector electrode of triode connects output interface.
Further, amplifying circuit also comprises: the second diode, and the positive pole of the second diode is connected with the collector electrode of triode, and the negative pole of the second diode connects the output interface of amplifying circuit; The 4th electric capacity, the 4th first end of electric capacity and the collector electrode of triode are connected, the second end ground connection of the 4th electric capacity.
To achieve these goals, according to an aspect of the present utility model, provide a kind of electric equipment, this electric equipment comprises control mainboard.
Adopt the utility model, by power supply input circuit, the input voltage of power supply is transferred to the first direct current of the first predeterminated voltage value, then by voltage conversion circuit, the first direct current is transferred to the second direct current that meets electronic devices and components supply power voltage, use this second direct current to power for electronic devices and components, the mode of 220V Alternating Current Power Supply is not provided in the control mainboard providing at the utility model, but adopt the first direct current of meeting the first predeterminated voltage value to provide voltage for each module of controlling in mainboard, also control and in mainboard, only have direct voltage, there is not alternating voltage, thereby having solved air-conditioner controller in prior art uses 220V ac power supply electromagnetic interference strong, the problem that electric shock has a big risk, realize the electromagnetic interference that reduces to control in mainboard, and use voltage is that the first direct current of the first predeterminated voltage value is safe power supply, the effect of the risk of not getting an electric shock.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms the application's a part, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is according to control motherboard power supply conversion schematic diagram of the prior art;
Fig. 2 is according to the structural representation of the control mainboard of the utility model embodiment;
Fig. 3 is the control motherboard power supply conversion schematic diagram according to the utility model embodiment;
Fig. 4 is the voltage conversion circuit figure that turns 5V according to the 24V of the utility model embodiment;
Fig. 5 is the voltage conversion circuit figure that turns 3.3V according to the 5V of the utility model embodiment;
Fig. 6 is the voltage conversion circuit figure that turns 1.8V according to the 5V of the utility model embodiment;
Fig. 7 is according to the circuit diagram of the Digital Signals 24V load of the utility model embodiment; And
Fig. 8 is according to the circuit diagram of the analog signal control 24V load of the utility model embodiment.
Embodiment
It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.
Fig. 2 is according to the structural representation of the control mainboard of the utility model embodiment.As shown in Figure 2, this control mainboard can comprise: power supply input circuit 10, is connected with power supply 20, for the input voltage of power supply being converted to the first direct current of the first predeterminated voltage value; Electronic devices and components 30; Voltage conversion circuit 40, is connected between power supply input circuit and electronic devices and components, for the first direct current being converted to the second direct current of the supply power voltage that meets electronic devices and components, uses the second direct current to power for electronic devices and components.
Adopt the utility model, by power supply input circuit, the input voltage of power supply is transferred to the first direct current of the first predeterminated voltage value, then by voltage conversion circuit, the first direct current is transferred to the second direct current that meets electronic devices and components supply power voltage, use this second direct current to power for electronic devices and components, the mode of 220V Alternating Current Power Supply is not provided in the control mainboard providing at the utility model, but adopt the first direct current of meeting the first predeterminated voltage value to provide voltage for each module of controlling in mainboard, also control and in mainboard, only have direct voltage, there is not alternating voltage, thereby having solved air-conditioner controller in prior art uses 220V ac power supply electromagnetic interference strong, the problem that electric shock has a big risk, realize the electromagnetic interference that reduces to control in mainboard, and use voltage is that the first direct current of the first predeterminated voltage value is safe power supply, the effect of the risk of not getting an electric shock.
Particularly, use direct current for controlling the electronic devices and components power supply in mainboard, control in mainboard and only have direct current, do not have alternating current, Electromagnetic Compatibility is good, and the measure of the problems such as its reply EMC and the EMC device that will use can reduce a lot.
Wherein, the first predeterminated voltage value can be for being less than or equal to any voltage value of 36V.Preferably the first predeterminated voltage value can be 24V.
As shown in Figure 3, can be electronic devices and components power supplies by the 24V direct current of power supply input circuit input, can also use 24V direct current control load simultaneously.
The direct current that uses 24V, has compared with prior art saved the link that converts practical application voltage from 220VAC to, controls security reliability and the capacity usage ratio of mainboard, and saved a large amount of components and parts and space cost thereby improved.
Circuit diagram as shown in Figure 3, save the link that converts practical application voltage (being the second direct current above-described embodiment) from 220VAC to, the operating voltage that 220VAC is converted to electronic devices and components needs a large amount of device and time, and there is power consumption, and only need simple circuit to realize the operating voltage that the first direct current is converted to electronic devices and components, improve security reliability and the capacity usage ratio of controlling mainboard; A large amount of components and parts and space cost are saved.
Particularly, the power supply input circuit of the control mainboard in above-described embodiment can be (as 24VDC) first direct current below 36V by the voltage transitions of power supply, then the first direct current of 24VDC is converted to the operating voltage (as 5VDC/3.3VDC/1.8VDC) of controlling other electronic devices and components on mainboard and comes to the electronic devices and components power supply of controlling modules on mainboard, can also pass through Controlled by micro computer IC(as the optocoupler TLP3554 of Toshiba simultaneously) the direct control of realization to 24VDC load, thereby realize the direct voltage that only has safe voltage (36VDC) following on controller mainboard, there is not alternating voltage, it is the safe and reliable control mainboard of pure direct current.
In above-described embodiment of the present utility model, power supply can comprise: DC power supply; Power supply input circuit comprises: transforming circuit, transforming circuit is connected with DC power supply, for the initial direct current transformation processing of DC power supply input is obtained to the first direct current that voltage is the first predeterminated voltage value.
In another one embodiment of the present utility model, power supply can comprise: AC power; Power supply input circuit comprises: inverter circuit, inverter circuit is connected with AC power, for the alternating current inversion processing of AC power input is obtained to the first direct current that voltage is the first predeterminated voltage value.
The first direct current is converted to the second direct current by voltage conversion circuit shown in Fig. 4 to Fig. 6, particularly, can realize the conversion of 24VDC to 5VDC power supply by switching power source chip 41 as shown in Figure 4, to give the power supply of the load (as the Controlled by micro computer electronic device of analog output) on the control mainboard of 5VDC; As shown in Figure 5 and Figure 6, can use the first voltage transitions chip 42 and second voltage conversion chip 43 that 5VDC is converted to respectively to 3.3VDC and 1.8VDC,
Wherein, the first switching power source chip can be TPS54233DRG4; The first voltage transitions chip 42 can be the 3.3VDC chip of NCV1117; Second voltage conversion chip 43 can be the 1.8VDC chip of NCV1117.
Further, controlling mainboard can also comprise as shown in Figure 7: digital processing unit 51; Load control circuit, is connected with digital processing unit, and digital processing unit uses Digital Signals load control circuit output digital power system electric current.
As shown in Figure 7, load control circuit comprises: the digital signal of the input input digital processing unit of the first resistance R 1, the first resistance; The first end of the first capacitor C 1, the first electric capacity is inputted the second direct current, and the second end of the first electric capacity is connected with the output of the first resistance; Optical coupler K1, the first end of optical coupler is inputted the first direct current, the second end supplied with digital signal of optical coupler, the 3rd end output digital power system electric current of optical coupler, the 4th end ground connection of optical coupler; The first diode D1, the negative pole of the first diode is connected with the 3rd end of optical coupler, the second end ground connection of the first diode.
Particularly, as shown in Figure 7, first the digital signal of digital processing unit 51 is added to the input of optical coupler K1, and this optical coupler can be TLP3554, is controlled optical coupler K1 and realized the control output of the load to 24V direct current by digital processing unit 51.
In another one embodiment of the present utility model, controlling mainboard can also comprise: analog processor; Current control circuit, current control circuit is connected with analog processor, and analog processor meets the simulation supply current of predetermined current scope by the output of analog signal control current control circuit.
Particularly, control mainboard and also comprise: filter circuit, filter circuit is connected with analog processor, obtains filtering signal for analog signal is carried out to filtering processing; Amplifying circuit, is connected with filter circuit, obtains simulating supply current for amplification filtering signal.
As shown in Figure 8, this filter circuit can comprise: the first end input analog signal of the second resistance R 2, the second resistance; The second capacitor C 2; The positive pole of the second electric capacity is connected with the second end of the second resistance, the minus earth of the second electric capacity; The 3rd capacitor C 3, the three electric capacity are connected with the second Capacitance parallel connection; The second end of the second resistance is as the output output filtering signal of filter circuit.
In circuit diagram shown in Figure 8, amplifying circuit can comprise: the positive input of the first operational amplifier 55, the first operational amplifiers is connected with the output of filter circuit; The first end of the 3rd resistance R 3, the three resistance is connected with the negative input of the first operational amplifier, the second end ground connection of the 3rd resistance; The first end of the 4th resistance R 4, the four resistance is connected with the output of the first operational amplifier; The negative input of the second operational amplifier 57, the second operational amplifiers is connected with the second end of the 4th resistance, and the positive input of the second operational amplifier connects reference power supply (+24V); Triode Q1, the base stage of triode is connected with the output of the second operational amplifier, the emitter of triode is by the 5th resistance R 5 output simulation supply currents (+24V), and the collector electrode of triode is connected with output interface, the Power supply of the first use+24V of operational amplifier 55 as shown in Figure 8.
Further, amplifying circuit also comprises: the second diode D2, and the positive pole of the second diode is connected with the collector electrode of triode, the negative pole output interface of the second diode; The 4th capacitor C 4, the four first ends of electric capacity and the collector electrode of triode are connected, the second end ground connection of the 4th electric capacity.
In the circuit diagram shown in Fig. 8, mainly realize the output of the simulation supply current of 4～20mA with two stage amplifer the first operational amplifier 55, the second operational amplifier 57 and triode Q1.Wherein, the first operational amplifier 55, the second operational amplifier 57 can be LM258, and triode can be sheet triode 9012 (PNP)).
Particularly, first after analog processor 53 outputting analog signals (as pwm signal), after processing, the filtering of filter circuit enters first order amplifier (i.e. the first operational amplifier, also can be follower, for isolating the current path between analog processor output and second level amplifier), then the reverse input end that the output of first order amplifier is connected on to second level amplifier, the positive input of second level amplifier connects reference voltage; The output control triode output simulation supply current of second level amplifier has increased protection and filtering measures (the second diode and the 4th electric capacity) that electric current is exported simultaneously.In the above-described embodiments, if there is fluctuation in the 24VDC power supply of the deferent segment of 4～20mA simulation supply current, the positive input of second level amplifier obtain reference power supply also can be along with changing accordingly, thereby realize the stable output of 4～20mA electric current.Wherein, second level amplifier is the second operational amplifier.
In above-described embodiment of the present utility model, owing to not re-using 220VAC supply power mode, but adopt the supply power mode of 36VDC voltage following (as 24VDC) to power, do not convert the link of practical application voltage to from 220VAC, the utilance of energy is high; Use direct current voltage supply, controlling mainboard only has direct voltage, does not have alternating voltage simultaneously, and the measure of the problems such as its reply EMC and the EMC device that will use can be not a lot; And control mainboard be output as by microelectronics (as the digital processing unit in above-described embodiment and analog processor) control IC(as optocoupler) control the load of (as 24VDC) below 36VDC voltage, its output circuit is simple, safety.
According to an aspect of the present utility model, a kind of electric equipment is also provided, this electric equipment comprises in above-described embodiment any one control mainboard.
Adopt the utility model, by power supply input circuit, the input voltage of power supply is transferred to the first direct current of the first predeterminated voltage value, then by voltage conversion circuit, the first direct current is transferred to the second direct current that meets electronic devices and components supply power voltage, use this second direct current to power for electronic devices and components, the mode of 220V Alternating Current Power Supply is not provided in the control mainboard providing at the utility model, but adopt the first direct current of meeting the first predeterminated voltage value to provide voltage for each module of controlling in mainboard, also control and in mainboard, only have direct voltage, there is not alternating voltage, thereby having solved air-conditioner controller in prior art uses 220V ac power supply electromagnetic interference strong, the problem that electric shock has a big risk, realize the electromagnetic interference that reduces to control in mainboard, and use voltage is that the first direct current of the first predeterminated voltage value is safe power supply, the effect of the risk of not getting an electric shock.
As can be seen from the above description, the utility model has been realized following technique effect:
Adopt the utility model, by power supply input circuit, the input voltage of power supply is transferred to the first direct current of the first predeterminated voltage value, then by voltage conversion circuit, the first direct current is transferred to the second direct current that meets electronic devices and components supply power voltage, use this second direct current to power for electronic devices and components, the mode of 220V Alternating Current Power Supply is not provided in the control mainboard providing at the utility model, but adopt the first direct current of meeting the first predeterminated voltage value to provide voltage for each module of controlling in mainboard, also control and in mainboard, only have direct voltage, there is not alternating voltage, thereby having solved air-conditioner controller in prior art uses 220V ac power supply electromagnetic interference strong, the problem that electric shock has a big risk, realize the electromagnetic interference that reduces to control in mainboard, and use voltage is that the first direct current of the first predeterminated voltage value is safe power supply, the effect of the risk of not getting an electric shock.
Obviously, those skilled in the art should be understood that, above-mentioned of the present utility model each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that multiple calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module to be realized.Like this, the utility model is not restricted to any specific hardware and software combination.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (11)
1. control a mainboard, it is characterized in that, comprising:
Power supply input circuit, is connected with power supply, for the input voltage of described power supply being converted to the first direct current of the first predeterminated voltage value;
Electronic devices and components;
Voltage conversion circuit, be connected between described power supply input circuit and described electronic devices and components, for described the first direct current being converted to the second direct current of the supply power voltage that meets described electronic devices and components, using described the second direct current is described electronic devices and components power supply.
2. control mainboard according to claim 1, is characterized in that,
Described power supply comprises: DC power supply;
Described power supply input circuit comprises: transforming circuit, described transforming circuit is connected with described DC power supply, for the initial direct current transformation processing of described DC power supply input is obtained to described the first direct current that voltage is described the first predeterminated voltage value.
3. control mainboard according to claim 1, is characterized in that,
Described power supply comprises: AC power;
Described power supply input circuit comprises: inverter circuit, described inverter circuit is connected with described AC power, for the alternating current inversion processing of described AC power input is obtained to described the first direct current that voltage is described the first predeterminated voltage value.
4. control mainboard according to claim 1, is characterized in that, described control mainboard also comprises:
Digital processing unit;
Load control circuit, is connected with described digital processing unit, and described digital processing unit uses load control circuit output digital power system electric current described in Digital Signals.
5. control mainboard according to claim 4, is characterized in that, described load control circuit comprises:
The first resistance, the input of described the first resistance is inputted the described digital signal of described digital processing unit;
The first electric capacity, the first end of described the first electric capacity is inputted described the second direct current, and the second end of described the first electric capacity is connected with the output of described the first resistance;
Optical coupler, the first end of described optical coupler is inputted described the first direct current, and the second end of described optical coupler is inputted described digital signal, and the 3rd end of described optical coupler is exported described digital power system electric current, the 4th end ground connection of described optical coupler;
The first diode, the negative pole of described the first diode is connected with the 3rd end of described optical coupler, the second end ground connection of described the first diode.
6. control mainboard according to claim 1, is characterized in that, described control mainboard also comprises:
Analog processor;
Current control circuit, described current control circuit is connected with described analog processor, and described analog processor meets the simulation supply current of predetermined current scope by current control circuit output described in analog signal control.
7. control mainboard according to claim 6, is characterized in that, described control mainboard also comprises:
Filter circuit, described filter circuit is connected with described analog processor, obtains filtering signal for described analog signal is carried out to filtering processing;
Amplifying circuit, is connected with described filter circuit, obtains described simulation supply current for amplifying described filtering signal.
8. control mainboard according to claim 7, is characterized in that, described filter circuit comprises:
The second resistance, the first end of described the second resistance is inputted described analog signal;
The second electric capacity; The positive pole of described the second electric capacity is connected with the second end of described the second resistance, the minus earth of described the second electric capacity;
The 3rd electric capacity, described the 3rd electric capacity is connected with described the second Capacitance parallel connection;
The second end of described the second resistance is exported described filtering signal as the output of described filter circuit.
9. control mainboard according to claim 7, is characterized in that, described amplifying circuit comprises:
The first operational amplifier, the positive input of described the first operational amplifier is connected with the output of described filter circuit;
The 3rd resistance, the first end of described the 3rd resistance is connected with the negative input of described the first operational amplifier, the second end ground connection of described the 3rd resistance;
The 4th resistance, the first end of described the 4th resistance is connected with the output of described the first operational amplifier;
The second operational amplifier, the negative input of described the second operational amplifier is connected with the second end of described the 4th resistance, and the positive input of described the second operational amplifier connects reference power supply;
Triode, the base stage of described triode is connected with the output of described the second operational amplifier, and the emitter of described triode is exported described simulation supply current by the 5th resistance, and the collector electrode of described triode connects output interface.
10. control mainboard according to claim 9, is characterized in that, described amplifying circuit also comprises:
The second diode, the positive pole of described the second diode is connected with the collector electrode of described triode, and the negative pole of described the second diode connects the output interface of described amplifying circuit;
The 4th electric capacity, described the 4th first end of electric capacity and the collector electrode of described triode are connected, the second end ground connection of described the 4th electric capacity.
11. 1 kinds of electric equipments, is characterized in that, comprise the control mainboard described in any one in claim 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320825429.5U CN203608083U (en) | 2013-12-12 | 2013-12-12 | Control mainboard and electrical equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320825429.5U CN203608083U (en) | 2013-12-12 | 2013-12-12 | Control mainboard and electrical equipment |
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| CN203608083U true CN203608083U (en) | 2014-05-21 |
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| CN201320825429.5U Withdrawn - After Issue CN203608083U (en) | 2013-12-12 | 2013-12-12 | Control mainboard and electrical equipment |
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| CN (1) | CN203608083U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104716824A (en) * | 2013-12-12 | 2015-06-17 | 珠海格力电器股份有限公司 | Control mainboard and electrical equipment |
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2013
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104716824A (en) * | 2013-12-12 | 2015-06-17 | 珠海格力电器股份有限公司 | Control mainboard and electrical equipment |
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Granted publication date: 20140521 Effective date of abandoning: 20180417 |