CN104566767A - Power circuit and air conditioning unit - Google Patents
Power circuit and air conditioning unit Download PDFInfo
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- CN104566767A CN104566767A CN201310501066.4A CN201310501066A CN104566767A CN 104566767 A CN104566767 A CN 104566767A CN 201310501066 A CN201310501066 A CN 201310501066A CN 104566767 A CN104566767 A CN 104566767A
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- Prior art keywords
- bus
- air
- conditioner set
- power supply
- voltage
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0006—Arrangements for supplying an adequate voltage to the control circuit of converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/008—Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators
Abstract
The invention discloses a power circuit and an air conditioning unit. The power circuit comprises a rectifier, a first DC bus and an inverter which are connected in sequence. The power circuit further comprises a switching power supply. The input end of the switching power supply is connected with the first DC bus, and the output end of the switching power supply is connected with a second DC bus. The switching power supply supplies power for the weak current load through the second DC bus. The power circuit and the air conditioning unit solve the problem that the electromagnetic interference among different types of voltages in the power circuit of related technologies is serious so that the improvement of the anti-interference performance of the power circuit can be achieved.
Description
Technical field
The present invention relates to electric and field of air conditioning, in particular to a kind of power circuit and air-conditioner set.
Background technology
Variable-frequency central air conditioner (centrifugal chiller etc.) electrical control is divided into two parts: a part is major loop, and basic load is compressor; A part is control loop in addition, and basic load is controller, valve body, sensor.
In the related, the major loop part of the variable-frequency central air conditioner of general routine is used for the alternating current of 380V or 220V to be supplied to compressor after over commutation and inversion, control loop then for being supplied to controller, valve body, sensor by the alternating current of 380V or 220V after over commutation, therefore, the main circuit voltage of conventional variable-frequency central air conditioner is generally direct current (Direct Current is called for short DC) 400V-700V; Control loop voltage is generally interchange (Alternating Current, be called for short AC) 380V, AC220V, DC24V, DC12V and DC5V etc., namely conventional variable-frequency central air conditioner voltage of a great variety.
Like this, in the electrical system of variable-frequency central air conditioner, owing to there is DC voltage and alternating voltage simultaneously, therefore need to use polytype electrical equipment and power supply treating apparatus, this makes circuit voltage system very complicated.In addition, because voltage type is different, between dissimilar voltage, interference is very serious mutually, greatly reduces the reliability of whole electric control system.
For the problem that the electromagnetic interference between voltage dissimilar in power circuit in correlation technique is more serious, at present effective solution is not yet proposed.
Summary of the invention
Main purpose of the present invention is to provide a kind of power circuit and air-conditioner set, to solve the more serious problem of electromagnetic interference in correlation technique in power circuit between dissimilar voltage.
To achieve these goals, according to the invention provides a kind of power circuit.This power circuit comprises: the rectifier connected successively, the first dc bus and inverter, also comprise: Switching Power Supply, the input of Switching Power Supply is connected with the first dc bus, the output of Switching Power Supply is connected with the second dc bus, and Switching Power Supply is light current load supplying by the second dc bus.
Further, this power circuit also comprises: the first switch, is arranged in the positive electrode bus of the second dc bus; And/or second switch, be arranged on the negative electrode bus of the second dc bus.
Further, the voltage of the first dc bus is greater than the voltage of the second dc bus.
To achieve these goals, according to present invention also offers a kind of air-conditioner set.This air-conditioner set comprises: power circuit, wherein, power circuit comprises Switching Power Supply and the rectifier be connected successively, the first dc bus and inverter, the input of Switching Power Supply is connected with the first dc bus, the output of Switching Power Supply is connected with the second dc bus, and Switching Power Supply is light current load supplying by the second dc bus; And pass through compressor and/or the permagnetic synchronous motor of inverter power supply.
Further, power circuit also comprises: the first switch, is arranged in the positive electrode bus of the second dc bus; And/or second switch, be arranged on the negative electrode bus of the second dc bus.
Further, light current load comprises: for controlling the mainboard of air-conditioner set, mainboard is connected with the second dc bus.
Further, light current load also comprises: the first temperature sensor, the first end of the first temperature sensor is connected to the positive electrode bus of the second dc bus, second end of the first temperature sensor is connected to mainboard, for detecting the refrigerant temperature of air-conditioner set and/or chilled water temperature and/or cooling water temperature.
Further, light current load also comprises: pressure sensor, and the first end of pressure sensor is connected to the positive electrode bus of the second dc bus, and the second end of pressure sensor is connected to mainboard, for detecting the system pressure of air-conditioner set.
Further, light current load also comprises: the second temperature sensor, is connected to mainboard, and by main board power supply, the second temperature sensor is thermistor temperature sensor.
Further, light current load also comprises: touch-screen, first end and second end of touch-screen are connected to mainboard, for transmitting data, the positive electrode bus of three-terminal link to the second dc bus of touch-screen, 4th end of touch-screen is connected to the negative electrode bus of the second dc bus, for powering for touch-screen.
Further, light current load also comprises: be connected to mainboard, and by the electric expansion valve of main board power supply and/or temperature protector and/or tracer.
Further, light current load also comprises: indicator lamp, and first end is connected to the positive electrode bus of the second dc bus, and the second end is connected to the negative electrode bus of the second dc bus.
Further, the voltage of the first dc bus is greater than the voltage of the second dc bus.
Further, the voltage of the first dc bus is 400V to 700V, and the voltage of the second dc bus is 5V to 48V.
Further, air-conditioner set is centrifugal refrigerating machines or screw-type water chiller.
Pass through the present invention, adopt the rectifier, the first dc bus and the inverter that connect successively, the input of Switching Power Supply is connected with the first dc bus, the output of Switching Power Supply is connected with the second dc bus, Switching Power Supply is light current load supplying by the second dc bus, solve the problem that electromagnetic interference in correlation technique in power circuit between dissimilar voltage is more serious, and then reach the effect of the anti-interference improving power circuit.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the power circuit according to the embodiment of the present invention;
Fig. 2 is the schematic diagram of air-conditioner set circuit structure according to a first embodiment of the present invention; And
Fig. 3 is the schematic diagram of air-conditioner set circuit structure according to a second embodiment of the present invention.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
It should be noted that, term " first ", " second " etc. in description of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as embodiments of the invention described herein can with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, and intention is to cover not exclusive comprising.
According to embodiments of the invention, provide a kind of power circuit, for providing AC power for high pressure major loop and providing dc source for low-voltage control circuit.It should be noted that, power circuit of the present invention may be used for the power circuit of variable-frequency central air conditioner unit, and air-conditioner set can be centrifugal refrigerating machines or screw-type water chiller.
Fig. 1 is the schematic diagram of power circuit according to a first embodiment of the present invention.
As shown in Figure 1, this power circuit comprises: rectifier 10, inverter 20, Switching Power Supply 30, first dc bus 40 and the second dc bus 50.
Rectifier 10 is arranged in major loop, be connected with inverter 20 with the first dc bus 40 successively, this rectifier 10 is for carrying out rectification to obtain DC voltage to civil power, this DC voltage is the voltage of the first dc bus 40, wherein, civil power can be three-phase electricity, such as, civil power can be the voltage of AC380V or AC220V, like this, rectifier 10 can the voltage of rectification AC380V or AC220V be the voltage of DC400V to DC700V, and wherein, the voltage of this DC400V to DC700V is the voltage of the first dc bus 40.It should be noted that, in embodiments of the present invention, the voltage of the first dc bus 40 can be DC high voltage, and the voltage of the second dc bus 50 can be DC low-voltage, that is, the voltage of the first dc bus 40 can be greater than the voltage of the second dc bus 50.
Inverter 20 is arranged in major loop, rectifier 10 is connected to by the first dc bus 40, this inverter 20 is for carrying out inversion to obtain alternating voltage by the DC voltage of the first dc bus 40, and wherein, this alternating voltage can drive compressor and/or permagnetic synchronous motor.
The input of Switching Power Supply 30 is connected with the first dc bus 40, and the output of Switching Power Supply 30 is connected with the second dc bus 50, and Switching Power Supply 30 is light current load supplying by the second dc bus 50.It should be noted that, in embodiments of the present invention, Switching Power Supply 30 can be high-voltage switch power supply.This Switching Power Supply 30 is for changing the DC voltage of the second dc bus 50 into by the DC voltage of the first dc bus 40, such as, this Switching Power Supply 30 can change the DC high voltage of the DC400V to DC700V of the first dc bus 40 into the voltage such as DC48V or DC24V or DC12V or DC5V.Particularly, two inputs of Switching Power Supply 30 are connected to the positive electrode bus of the first dc bus 40 in major loop and the negative electrode bus of the first dc bus 40 respectively, namely two outputs of rectifier 10 are connected to, two outputs of Switching Power Supply 30 are connected to the positive electrode bus of the second dc bus 50 in low-voltage control circuit and the negative electrode bus of the second dc bus 50 respectively, Switching Power Supply 30 provides dc source for the light current load being low-voltage control circuit by the second dc bus 50, wherein, the size of the magnitude of voltage of the dc source that Switching Power Supply 30 provides for low-voltage control circuit can regulate.
In the power circuit of this embodiment, because rectifier 10 is by after the voltage of the commercial power rectification of AC380V or AC220V one-tenth DC400V to DC700V, Switching Power Supply 30 can by the High Level DC Voltage side power taking of the mode of step-down from the rectifier 10 major loop, namely from power taking the first dc bus 40, and High Level DC Voltage is reduced to low dc voltage and thinks that low-voltage control circuit provides supply voltage, thus, the voltage of DC voltage one type is only had in low-voltage control circuit, achieve the full direct current of low-voltage control circuit, thus the electromagnetic interference reduced in power circuit, and then reach the effect of the anti-interference improving power circuit.
Fig. 2 is the schematic diagram of air-conditioner set circuit structure according to a first embodiment of the present invention.
As shown in Figure 2, this embodiment can as preferred embodiment embodiment illustrated in fig. 1, the air-conditioner set of this embodiment is except comprising the power circuit of the first embodiment, namely, outside rectifier 10, inverter 20, Switching Power Supply 30, first dc bus 40 and the second dc bus 50, also comprise: light current load 60 and compressor 70.
It should be noted that, power circuit of the present invention may be used for the power circuit of variable-frequency central air conditioner unit, and air-conditioner set can be centrifugal refrigerating machines or screw-type water chiller, and wherein, air-conditioner set can also comprise permagnetic synchronous motor.
The effect of power circuit (i.e. rectifier 10, inverter 20, Switching Power Supply 30, first dc bus 40 and the second dc bus 50) and identical in the first embodiment, do not repeat them here.
Light current load 60 can comprise mainboard for controlling air-conditioner set, touch-screen, one or more temperature sensor, pressure sensor, electric expansion valve, temperature protector, tracer, indicator lamp and other light current loads etc.
Compressor 70 is arranged in major loop, and compressor 70 is connected to inverter 20.Particularly, the input of compressor 70 is connected to the ac output end of inverter 20, and like this, the alternating voltage that inverter 20 inversion obtains can as the driving voltage of compressor 70.
Fig. 3 is the schematic diagram of air-conditioner set circuit structure according to a second embodiment of the present invention.
As shown in Figure 3, this embodiment can as preferred embodiment embodiment illustrated in fig. 1, the air-conditioner set of this embodiment is except comprising the power circuit of the first embodiment, i.e. rectifier 10, inverter 20, Switching Power Supply 30, outside first dc bus 40 and the second dc bus 50, also comprise: the first switch 80 and second switch 90, and mainboard 601, first temperature sensor 602, pressure sensor 603, second temperature sensor 604, touch-screen 605, electric expansion valve 606, temperature protector 607, tracer 608, indicator lamp 609 and other loads such as light current such as light current load 610 grade 60.
The effect of power circuit (i.e. rectifier 10, inverter 20, Switching Power Supply 30, first dc bus 40 and the second dc bus 50) and identical in the first embodiment, do not repeat them here.
It should be noted that, in embodiments of the present invention, the voltage of the first dc bus 40 can be DC high voltage, and the voltage of the second dc bus 50 can be DC low-voltage, that is, the voltage of the first dc bus 40 can be greater than the voltage of the second dc bus 50.Wherein, the voltage of the first dc bus can be 400V to 700V, and the voltage of the second dc bus can be 5V to 48V.
First switch 80 is arranged in the positive electrode bus of the second dc bus.Second switch 90 is arranged on the negative electrode bus of the second dc bus.First switch 80 and second switch 90, for controlling conducting and the disconnection of low-voltage control circuit, it should be noted that, in embodiments of the present invention, can only adopt a switch to control conducting and the disconnection of low-voltage control circuit.Particularly, when the first switch 80 and second switch 90 are simultaneously closed, low-voltage control circuit is conducting state, when the first switch 80 is closed, second switch 90 disconnects, low-voltage control circuit is off state, when the first switch 80 disconnect, second switch 90 close time, low-voltage control circuit is off state.
In embodiments of the present invention, mainboard 601 is connected to the second dc bus 50.Mainboard 601 has microprocessor, memory, digital processing unit and controller etc., perform detection for controlling the light current loads 60 such as the first temperature sensor 602 and pressure sensor 603, and carry out the data processing such as storing to testing result.Mainboard 601 can also provide power supply for control device.
The first end of the first temperature sensor 602 is connected to the second end of the first switch 80 and the input of mainboard 601, namely the first end of the first temperature sensor 602 is connected to the second dc bus 50, second end of the first TEMP 602 is connected to mainboard 601, for detecting refrigerant temperature in air-conditioner set and/or water temperature.Wherein, the temperature value detected from Switching Power Supply 30 power taking, and is sent to mainboard by the first temperature sensor 602.First temperature sensor 602 can comprise one or more, this one or more the first temperature sensor 602 is for detecting environment higher to temperature detecting precision demand in variable-frequency central air conditioner unit, as detected suction, the delivery temperature of compressor, the Inlet and outlet water temperature etc. of condenser and/or evaporimeter.Preferably, the first temperature sensor 602 is platinum resistance temperature sensor.
The first end of pressure sensor 603 is connected to the first end of the second end of the first switch 80, the input of mainboard 601 and the first temperature sensor 602, and the second end of pressure sensor 603 is connected to mainboard 602, for detecting the system pressure of air-conditioner set.Wherein, the force value detected from Switching Power Supply 30 power taking, and is sent to mainboard 601 by pressure sensor 603.Pressure sensor 603 can comprise one or more, and this one or more pressure sensor 603 can detect the pressure of the compressor suction of variable-frequency central air conditioner unit, pressure at expulsion, air-conditioner set pipeline and/or pressure vessel everywhere.
Second temperature sensor 604 is arranged in low-voltage control circuit, and is connected to mainboard 601.Wherein, the second temperature sensor 604 is from mainboard 601 power taking.Second temperature sensor 604 can comprise one or more, and this one or more the second temperature sensor 604 can detect environment not high to temperature detecting precision demand in variable-frequency central air conditioner unit, as lubricating oil temperature detection, environment temperature detection etc.Preferably, the second temperature sensor 604 is thermistor temperature sensor.
Touch-screen 605 is arranged in low-voltage control circuit, and the first end of this touch-screen 605 and the second end are connected to mainboard 601, the positive electrode bus of three-terminal link to the second dc bus 50 of this touch-screen 605, the negative electrode bus of three-terminal link to the second dc bus 50 of this touch-screen 605.Wherein, the first end of this touch-screen 605 is connected with mainboard 601 as data wire with the second end, thus and carries out data communication between mainboard 601.Such as, can be arranged the temperature of air-conditioner set by this touch-screen 605, meanwhile, temperature configuration information can be sent to the microprocessor on mainboard 601 by its first end and the second end by this touch-screen 605.Control information also can be sent to this touch-screen 605 by first end and the second end by the microprocessor on mainboard 601.This touch-screen 605 also can be used for the information such as displays temperature, pressure, time.4th end of the 3rd end and touch-screen 605 that this touch-screen 605 passes through touch-screen 605 is from mainboard 601 power taking.
Electric expansion valve 606 is arranged in low-voltage control circuit, and is connected to mainboard 601, for regulating the liquid supply rate of evaporimeter.Wherein, this electric expansion valve 606 is from mainboard 601 power taking.
Temperature protector 607 is arranged in low-voltage control circuit, and is connected to mainboard 601, works within certain temperature range for the protection of air-conditioner set.Wherein, this temperature protector 607 is from mainboard 601 power taking.
Tracer 608 is arranged in low-voltage control circuit, and is connected to mainboard 601.Tracer 608 can detect the fault message of air-conditioner set, and fault message is sent to the microprocessor on mainboard 601.This fault message, after receiving fault message, can be presented on touch-screen 605, to notify that maintenance personal keeps in repair by the microprocessor on this mainboard 601.Wherein, this tracer 608 is from mainboard 601 power taking.
Mainboard 601 is provided with power management module, for providing suitable voltage for the second temperature sensor 603, electric expansion valve 606, temperature protector 607 and tracer 608.
Indicator lamp 609 is arranged in low-voltage control circuit, its first end is connected to the second end of the first switch 80, namely first end is connected to the positive electrode bus of the second dc bus 50, second end of indicator lamp 609 is connected to the second end of second switch 90, and namely the second end is connected to the negative electrode bus of the second dc bus 50.Indicator lamp 609 can be one or more, and this one or more indicator lamp 609 is used to indicate the duty and malfunction etc. of air-conditioner set.
Other light current loads 610 are arranged in low-voltage control circuit, and the first end of other light current loads 610 is connected to the second end of the first switch 80, namely first end is connected to the positive electrode bus of the second dc bus 50, second end is connected to the second end of second switch 80, and namely the second end is connected to the negative electrode bus of the second dc bus 50.
From above description, can find out, in the air-conditioner set of this embodiment, because rectifier 10 is by after the voltage of the commercial power rectification of AC380V or AC220V one-tenth DC400V to DC700V, Switching Power Supply 30 can by the High Level DC Voltage side power taking of the mode of step-down from the rectifier 10 major loop, and High Level DC Voltage is reduced to low dc voltage and thinks that low-voltage control circuit provides supply voltage, thus, the voltage of DC voltage one type is only had in low-voltage control circuit, achieve the full direct current of low-voltage control circuit, thus the electromagnetic interference reduced in power circuit, and then reach the anti-interference improving power circuit, the effect of Electro Magnetic Compatibility and security.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. a power circuit, comprises the rectifier, the first dc bus and the inverter that connect successively, it is characterized in that, also comprise:
Switching Power Supply, the input of described Switching Power Supply is connected with described first dc bus, and the output of described Switching Power Supply is connected with the second dc bus, and described Switching Power Supply is light current load supplying by described second dc bus.
2. power circuit according to claim 1, is characterized in that, also comprises:
First switch, is arranged in the positive electrode bus of described second dc bus; And/or
Second switch, is arranged on the negative electrode bus of described second dc bus.
3. power circuit according to claim 1 and 2, is characterized in that, the voltage of described first dc bus is greater than the voltage of the second dc bus.
4. an air-conditioner set, is characterized in that, comprising:
Power circuit, wherein, described power circuit comprises Switching Power Supply and the rectifier be connected successively, the first dc bus and inverter, the input of described Switching Power Supply is connected with described first dc bus, the output of described Switching Power Supply is connected with the second dc bus, and described Switching Power Supply is light current load supplying by described second dc bus; And
By compressor and/or the permagnetic synchronous motor of described inverter power supply.
5. air-conditioner set according to claim 4, is characterized in that, described power circuit also comprises:
First switch, is arranged in the positive electrode bus of described second dc bus; And/or
Second switch, is arranged on the negative electrode bus of described second dc bus.
6. air-conditioner set according to claim 4, is characterized in that, described light current load comprises: for controlling the mainboard of described air-conditioner set, and described mainboard is connected with described second dc bus.
7. air-conditioner set according to claim 6, is characterized in that, described light current load also comprises:
First temperature sensor, the first end of described first temperature sensor is connected to the positive electrode bus of described second dc bus, second end of described first temperature sensor is connected to described mainboard, for detecting the refrigerant temperature of described air-conditioner set and/or chilled water temperature and/or cooling water temperature.
8. air-conditioner set according to claim 6, is characterized in that, described light current load also comprises:
Pressure sensor, the first end of described pressure sensor is connected to the positive electrode bus of described second dc bus, and the second end of described pressure sensor is connected to described mainboard, for detecting the system pressure of described air-conditioner set.
9. air-conditioner set according to claim 6, is characterized in that, described light current load also comprises: the second temperature sensor, is connected to described mainboard, and by described main board power supply, described second temperature sensor is thermistor temperature sensor.
10. air-conditioner set according to claim 6, it is characterized in that, described light current load also comprises: touch-screen, first end and second end of described touch-screen are connected to described mainboard, for transmitting data, the three-terminal link of described touch-screen is to the positive electrode bus of described second dc bus, and the 4th end of described touch-screen is connected to the negative electrode bus of described second dc bus, for powering for described touch-screen.
11. air-conditioner set according to claim 6, is characterized in that, described light current load also comprises: be connected to described mainboard, and by the electric expansion valve of described main board power supply and/or temperature protector and/or tracer.
12. air-conditioner set according to claim 4, is characterized in that, described light current load also comprises: indicator lamp, and first end is connected to the positive electrode bus of described second dc bus, and the second end is connected to the negative electrode bus of described second dc bus.
13. air-conditioner set according to any one of claim 4 to 12, it is characterized in that, the voltage of described first dc bus is greater than the voltage of the second dc bus.
14. air-conditioner set according to claim 13, is characterized in that, the voltage of described first dc bus is 400V to 700V, and the voltage of the second dc bus is 5V to 48V.
15. air-conditioner set according to claim 13, is characterized in that, described air-conditioner set is centrifugal refrigerating machines or screw-type water chiller.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310501066.4A CN104566767A (en) | 2013-10-22 | 2013-10-22 | Power circuit and air conditioning unit |
| PCT/CN2014/079986 WO2015058538A1 (en) | 2013-10-22 | 2014-06-16 | Power source circuit and air conditioning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310501066.4A CN104566767A (en) | 2013-10-22 | 2013-10-22 | Power circuit and air conditioning unit |
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|---|---|
| CN104566767A true CN104566767A (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310501066.4A Pending CN104566767A (en) | 2013-10-22 | 2013-10-22 | Power circuit and air conditioning unit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104566767A (en) |
| WO (1) | WO2015058538A1 (en) |
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| CN111288743A (en) * | 2020-02-21 | 2020-06-16 | 海信（山东）冰箱有限公司 | Household appliance fault detection system |
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| CN112670956B (en) * | 2021-01-18 | 2023-08-04 | 佛山市顺德区美的电子科技有限公司 | Overvoltage protection method and device for air conditioner and air conditioner |
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| CN201044416Y (en) * | 2007-05-09 | 2008-04-02 | 乐星产电(无锡)有限公司 | Frequency converter special for draught fan and water pump |
| CN201044422Y (en) * | 2007-05-09 | 2008-04-02 | 乐星产电(无锡)有限公司 | Intelligent general frequency converter |
| CN201995169U (en) * | 2011-01-12 | 2011-09-28 | 巢湖凯达照明技术有限公司 | Driving power supply of high-power LED (light-emitting diode) street lamp |
| CN203261288U (en) * | 2013-05-30 | 2013-10-30 | 安徽工程大学 | Multi-processor control device for alternating-current servo motor |
| CN203301411U (en) * | 2013-06-09 | 2013-11-20 | 周海涛 | Brushless motor system for electric hammer/electric pick |
| CN203301409U (en) * | 2013-06-09 | 2013-11-20 | 周海涛 | Brushless permanent-magnet motor system for electric tool |
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| CN201181908Y (en) * | 2007-08-02 | 2009-01-14 | 邓大海 | Frequency conversion circuit and industrial environment friendly air conditioner controller |
| CN201504190U (en) * | 2009-04-14 | 2010-06-09 | 韩熠 | Air-conditioning power supply transducer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107968558A (en) * | 2017-12-29 | 2018-04-27 | 太仓京和机电有限公司 | DC communication modular converter and there is its vehicular equipment |
| CN111288743A (en) * | 2020-02-21 | 2020-06-16 | 海信（山东）冰箱有限公司 | Household appliance fault detection system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015058538A1 (en) | 2015-04-30 |
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