CN203550116U - Power supply circuit and air conditioner unit - Google Patents
Power supply circuit and air conditioner unit Download PDFInfo
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- CN203550116U CN203550116U CN201320654150.5U CN201320654150U CN203550116U CN 203550116 U CN203550116 U CN 203550116U CN 201320654150 U CN201320654150 U CN 201320654150U CN 203550116 U CN203550116 U CN 203550116U
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Abstract
The utility model discloses a power supply circuit and an air conditioner unit. The power supply circuit comprises a rectifier, a first direct current bus and an inverter which are sequentially connected, and a switching power supply, wherein the input end of the switching power supply is connected with the first direct current bus, the output end of the switching power supply is connected with a second direct current bus, and the switching power supply supplies power to a weak current load through the second direct current bus. Through adopting the power supply circuit and the air conditioner unit, the problem of relatively serious electromagnetic interference among different types of voltages in a power supply circuit in the related technology is solved, and further the effect of improving the anti-interference performance of the power supply circuit is achieved.
Description
Technical field
The utility model relates to electric and field of air conditioning, in particular to a kind of power circuit and air-conditioning unit.
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 correlation technique, the major loop part of general conventional variable-frequency central air conditioner for offering compressor by the alternating current of 380V or 220V after over commutation and inversion, control loop for offering 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 is called for short AC) 380V, AC220V, DC24V, DC12V and DC5V etc., and conventional variable-frequency central air conditioner voltage is 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, due to voltage type difference, between dissimilar voltage phase mutual interference very serious, greatly reduce the reliability of whole electric control system.
For the more serious problem of the electromagnetic interference between dissimilar voltage in power circuit in correlation technique, effective solution is not yet proposed at present.
Utility model content
Main purpose of the present utility model is to provide a kind of power circuit and air-conditioning unit, to solve in correlation technique the more serious problem of the electromagnetic interference between dissimilar voltage in power circuit.
To achieve these goals, according to the utility model, provide a kind of power circuit.This power circuit comprises: the rectifier, the first dc bus and the inverter that connect successively, 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 pole 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 the utility model, also provide a kind of air-conditioning unit.This air-conditioning unit comprises: power circuit, wherein, power circuit comprises Switching Power Supply and the rectifier being 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 by 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 pole bus of the second dc bus.
Further, light current load comprises: for controlling the mainboard of air-conditioning unit, 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, the second end of the first temperature sensor is connected to mainboard, for detection of refrigerant temperature and/or chilled water temperature and/or the cooling water temperature of air-conditioning unit.
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 detection of the system pressure of air-conditioning unit.
Further, light current load also comprises: the second temperature sensor, be 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, the first end of touch-screen and the second end are connected to mainboard, be used for transmitting data, the 3rd end of touch-screen is connected to the positive electrode bus of the second dc bus, the 4th end of touch-screen is connected to the negative pole bus of the second dc bus, is used to touch-screen power supply.
Further, light current load also comprises: be connected to mainboard, and by electric expansion valve and/or temperature protector and/or the tracer of main board power supply.
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 pole 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-conditioning unit is centrifugal refrigerating machines or screw-type water chiller.
Pass through the utility model, 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 in correlation technique the more serious problem of the electromagnetic interference between dissimilar voltage in power circuit, and then reached the effect that improves the anti-interference of power circuit.
Accompanying drawing explanation
The accompanying drawing that forms the application's a part is used to provide further understanding of the present utility model, 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 the schematic diagram of the power circuit of the utility model embodiment;
Fig. 2 is according to the schematic diagram of the air-conditioning unit circuit structure of the utility model the first embodiment; And
Fig. 3 is according to the schematic diagram of the air-conditioning unit circuit structure of the utility model the second embodiment.
The specific 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.
It should be noted that, term " first " in description of the present utility model and claims and above-mentioned accompanying drawing, " second " etc. are for distinguishing similar object, and needn't be used for describing specific order or precedence.The data that should be appreciated that such use suitably can exchanged in situation, so as embodiment of the present utility model described herein can with except diagram here or describe those order enforcement.In addition, term " comprises " and " having " and their any distortion, is intended to be to cover not exclusive comprising.
According to embodiment of the present utility model, a kind of power circuit is provided, be used to high pressure major loop that AC power is provided and provide dc source for low-voltage control circuit.It should be noted that, power circuit of the present utility model can be for the power circuit of variable-frequency central air conditioner unit, and air-conditioning unit can be centrifugal refrigerating machines or screw-type water chiller.
Fig. 1 is according to the schematic diagram of the power circuit of the utility model the first embodiment.
As shown in Figure 1, this power circuit comprises: rectifier 10, inverter 20, Switching Power Supply 30, the first dc bus 40 and the second dc bus 50.
Rectifier 10 is arranged in major loop, be connected with the first dc bus 40 and inverter 20 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, for example, civil power can be the voltage of AC380V or AC220V, like this, rectifier 10 can rectification AC380V or the voltage of the AC220V voltage that is 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 the utility model embodiment, 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, by the first dc bus 40, be connected to rectifier 10, this inverter 20 is for carrying out the DC voltage of the first dc bus 40 inversion to obtain alternating voltage, and wherein, this alternating voltage can drive compression machine 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 the utility model embodiment, Switching Power Supply 30 can be high-voltage switch power supply.This Switching Power Supply 30 is for changing the DC voltage of the first dc bus 40 into the DC voltage of the second dc bus 50, for example, this Switching Power Supply 30 can change the DC high voltage of the DC400V to DC700V of the first dc bus 40 into the voltages such as DC48V or DC24V or DC12V or DC5V.Particularly, two inputs of Switching Power Supply 30 are connected to respectively the positive electrode bus of the first dc bus 40 in major loop and the negative pole bus of the first dc bus 40, be connected to two outputs of rectifier 10, two outputs of Switching Power Supply 30 are connected to respectively the positive electrode bus of the second dc bus 50 in low-voltage control circuit and the negative pole bus of the second dc bus 50, Switching Power Supply 30 provides dc source for the light current load that is 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 becomes the commercial power rectification of AC380V or AC220V after the voltage of DC400V to DC700V, Switching Power Supply 30 can be by the mode of step-down the High Level DC Voltage side-draw electricity of the rectifier 10 from major loop, i.e. power taking from the first dc bus 40, and High Level DC Voltage is reduced to low dc voltage thinks that low-voltage control circuit provides supply voltage, thereby, in low-voltage control circuit, only has the voltage of one type of DC voltage, realized the full direct current of low-voltage control circuit, thereby reduced the electromagnetic interference in power circuit, and then reached the effect of the anti-interference that improves power circuit.
Fig. 2 is according to the schematic diagram of the air-conditioning unit circuit structure of the utility model the first embodiment.
As shown in Figure 2, this embodiment can be used as preferred embodiment embodiment illustrated in fig. 1, the air-conditioning unit of this embodiment is except comprising the power circuit of the first embodiment, be outside rectifier 10, inverter 20, Switching Power Supply 30, the 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 utility model can be for the power circuit of variable-frequency central air conditioner unit, and air-conditioning unit can be centrifugal refrigerating machines or screw-type water chiller, and wherein, air-conditioning unit can also comprise permagnetic synchronous motor.
Identical with the first embodiment of the effect of power circuit (being rectifier 10, inverter 20, Switching Power Supply 30, the first dc bus 40 and the second dc bus 50), does not repeat them here.
Light current load 60 can comprise mainboard, touch-screen, one or more temperature sensor, pressure sensor, electric expansion valve, temperature protector, tracer, indicator lamp and other light current loads for controlling air-conditioning unit 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 inversions obtain can be used as the driving voltage of compressor 70.
Fig. 3 is according to the schematic diagram of the air-conditioning unit circuit structure of the utility model the second embodiment.
As shown in Figure 3, this embodiment can be used as preferred embodiment embodiment illustrated in fig. 1, the air-conditioning unit of this embodiment is except comprising the power circuit of the first embodiment, it is rectifier 10, inverter 20, Switching Power Supply 30, outside the first dc bus 40 and the second dc bus 50, also comprise: the first switch 80 and second switch 90, and mainboard 601, the first temperature sensor 602, pressure sensor 603, the second temperature sensor 604, touch-screen 605, electric expansion valve 606, temperature protector 607, tracer 608, indicator lamp 609 and other light current load 610 loads such as light current such as grade 60.
Identical with the first embodiment of the effect of power circuit (being rectifier 10, inverter 20, Switching Power Supply 30, the first dc bus 40 and the second dc bus 50), does not repeat them here.
It should be noted that, in the utility model embodiment, 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.
The first switch 80 is arranged in the positive electrode bus of the second dc bus.Second switch 90 is arranged on the negative pole bus of the second dc bus.The first switch 80 and second switch 90, for controlling conducting and the disconnection of low-voltage control circuit, it should be noted that, in the utility model embodiment, 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 is simultaneously closed, low-voltage control circuit is conducting state, when the first switch 80 closures, second switch 90 disconnect, low-voltage control circuit is off-state, when the first switch 80 disconnects, second switch 90 is when closed, low-voltage control circuit is off-state.
In the utility model embodiment, mainboard 601 is connected to the second dc bus 50.On mainboard 601, there are microprocessor, memory, digital processing unit and controller etc., for controlling light current loads such as the first temperature sensor 602 and pressure sensor 603 60, carry out and detect, and testing result is stored etc. to data processing.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, the first end of the first temperature sensor 602 is connected to the second dc bus 50, the second end of the first TEMP 602 is connected to mainboard 601, for detection of the refrigerant temperature in air-conditioning unit and/or water temperature.Wherein, the first temperature sensor 602 is from Switching Power Supply 30 power takings, and the temperature value detecting is sent to mainboard.The first temperature sensor 602 can comprise one or more, this one or more the first temperature sensor 602 is for detection of environment higher to temperature detecting precision demand in variable-frequency central air conditioner unit, as detect suction, the delivery temperature of compressor, the Inlet and outlet water temperature of condenser and/or evaporimeter etc.Preferably, the first temperature sensor 602 is platinum resistance temperature sensor.
The first end of pressure sensor 603 is connected to the second end, the input of mainboard 601 and the first end of the first temperature sensor 602 of the first switch 80, and the second end of pressure sensor 603 is connected to mainboard 602, for detection of the system pressure of air-conditioning unit.Wherein, pressure sensor 603 is from Switching Power Supply 30 power takings, and the force value detecting is sent to mainboard 601.Pressure sensor 603 can comprise one or more, and the compressor suction, pressure at expulsion, air-conditioning unit that this one or more pressure sensor 603 can detect variable-frequency central air conditioner unit be the pressure of pipeline and/or pressure vessel everywhere.
The 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 takings.The 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 3rd end of this touch-screen 605 is connected to the positive electrode bus of the second dc bus 50, and the 3rd end of this touch-screen 605 is connected to the negative pole bus of the second dc bus 50.Wherein, the first end of this touch-screen 605 is connected with mainboard 601 as data wire with the second end, thereby and between mainboard 601, carries out data communication.For example, the temperature of air-conditioning unit can be set by this touch-screen 605, meanwhile, this touch-screen 605 can send to the microprocessor on mainboard 601 by temperature configuration information by its first end and the second end.Microprocessor on mainboard 601 also can send to this touch-screen 605 by control information by first end and the second end.This touch-screen 605 also can be used for the information such as displays temperature, pressure, time.This touch-screen 605 by the 3rd end of touch-screen 605 and the 4th end of touch-screen 605 from mainboard 601 power takings.
Mainboard 601 is provided with power management module, is used to the second temperature sensor 603, electric expansion valve 606, temperature protector 607 and tracer 608 that suitable voltage is provided.
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, it is the positive electrode bus that first end is connected to the second dc bus 50, the second end is connected to the second end of second switch 80, and the second end is connected to the negative pole bus of the second dc bus 50.
From above description, can find out, in the air-conditioning unit of this embodiment, because rectifier 10 becomes the commercial power rectification of AC380V or AC220V after the voltage of DC400V to DC700V, Switching Power Supply 30 can be by the mode of step-down the High Level DC Voltage side-draw electricity of the rectifier 10 from major loop, and High Level DC Voltage is reduced to low dc voltage thinks that low-voltage control circuit provides supply voltage, thereby, in low-voltage control circuit, only has the voltage of one type of DC voltage, realized the full direct current of low-voltage control circuit, thereby reduced the electromagnetic interference in power circuit, and then reached the anti-interference that improves power circuit, the effect of Electro Magnetic Compatibility and security.
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 domain of the present utility model.
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 comprises:
Switching Power Supply, the input of described Switching Power Supply is connected with described the 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 the second dc bus.
2. power circuit according to claim 1, is characterized in that, also comprises:
The first switch, is arranged in the positive electrode bus of described the second dc bus; And/or
Second switch, is arranged on the negative pole bus of described the second dc bus.
3. power circuit according to claim 1 and 2, is characterized in that, the voltage of described the first dc bus is greater than the voltage of the second dc bus.
4. an air-conditioning unit, is characterized in that, comprising:
Power circuit, wherein, described power circuit comprises Switching Power Supply and the rectifier being connected successively, the first dc bus and inverter, the input of described Switching Power Supply is connected with described the 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 the second dc bus; And
By compressor and/or the permagnetic synchronous motor of described inverter power supply.
5. air-conditioning unit according to claim 4, is characterized in that, described power circuit also comprises:
The first switch, is arranged in the positive electrode bus of described the second dc bus; And/or
Second switch, is arranged on the negative pole bus of described the second dc bus.
6. air-conditioning unit according to claim 4, is characterized in that, described light current load comprises: for controlling the mainboard of described air-conditioning unit, described mainboard is connected with described the second dc bus.
7. air-conditioning unit according to claim 6, is characterized in that, described light current load also comprises:
The first temperature sensor, the first end of described the first temperature sensor is connected to the positive electrode bus of described the second dc bus, the second end of described the first temperature sensor is connected to described mainboard, for detection of refrigerant temperature and/or chilled water temperature and/or the cooling water temperature of described air-conditioning unit.
8. air-conditioning unit 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 the second dc bus, and the second end of described pressure sensor is connected to described mainboard, for detection of the system pressure of described air-conditioning unit.
9. air-conditioning unit according to claim 6, is characterized in that, described light current load also comprises: the second temperature sensor, be connected to described mainboard, and by described main board power supply, described the second temperature sensor is thermistor temperature sensor.
10. air-conditioning unit according to claim 6, it is characterized in that, described light current load also comprises: touch-screen, the first end of described touch-screen and the second end are connected to described mainboard, be used for transmitting data, the 3rd end of described touch-screen is connected to the positive electrode bus of described the second dc bus, and the 4th end of described touch-screen is connected to the negative pole bus of described the second dc bus, is used to described touch-screen power supply.
11. air-conditioning units according to claim 6, is characterized in that, described light current load also comprises: be connected to described mainboard, and by electric expansion valve and/or temperature protector and/or the tracer of described main board power supply.
12. air-conditioning units 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 the second dc bus, and the second end is connected to the negative pole bus of described the second dc bus.
13. according to the air-conditioning unit described in claim 4 to 12 any one, it is characterized in that, the voltage of described the first dc bus is greater than the voltage of the second dc bus.
14. air-conditioning units according to claim 13, is characterized in that, the voltage of described the first dc bus is 400V to 700V, and the voltage of the second dc bus is 5V to 48V.
15. air-conditioning units according to claim 13, is characterized in that, described air-conditioning unit is centrifugal refrigerating machines or screw-type water chiller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320654150.5U CN203550116U (en) | 2013-10-22 | 2013-10-22 | Power supply circuit and air conditioner unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320654150.5U CN203550116U (en) | 2013-10-22 | 2013-10-22 | Power supply circuit and air conditioner unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203550116U true CN203550116U (en) | 2014-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320654150.5U Expired - Fee Related CN203550116U (en) | 2013-10-22 | 2013-10-22 | Power supply circuit and air conditioner unit |
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| Country | Link |
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| CN (1) | CN203550116U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104456844A (en) * | 2014-11-19 | 2015-03-25 | 珠海格力电器股份有限公司 | Control method and device for air conditioning unit |
| CN104566767A (en) * | 2013-10-22 | 2015-04-29 | 珠海格力电器股份有限公司 | Power circuit and air conditioning unit |
| TWI571024B (en) * | 2015-08-27 | 2017-02-11 | 財團法人成大研究發展基金會 | Testing circuit system for reliability of protector |
-
2013
- 2013-10-22 CN CN201320654150.5U patent/CN203550116U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104566767A (en) * | 2013-10-22 | 2015-04-29 | 珠海格力电器股份有限公司 | Power circuit and air conditioning unit |
| WO2015058538A1 (en) * | 2013-10-22 | 2015-04-30 | 珠海格力电器股份有限公司 | Power source circuit and air conditioning unit |
| CN104456844A (en) * | 2014-11-19 | 2015-03-25 | 珠海格力电器股份有限公司 | Control method and device for air conditioning unit |
| CN104456844B (en) * | 2014-11-19 | 2017-10-27 | 珠海格力电器股份有限公司 | Air-conditioner set control method and device |
| TWI571024B (en) * | 2015-08-27 | 2017-02-11 | 財團法人成大研究發展基金會 | Testing circuit system for reliability of protector |
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Granted publication date: 20140416 Termination date: 20211022 |
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| CF01 | Termination of patent right due to non-payment of annual fee |