CN110285553A - Air-conditioning power measurement method, power-sensing circuit and air conditioner - Google Patents
Air-conditioning power measurement method, power-sensing circuit and air conditioner Download PDFInfo
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- CN110285553A CN110285553A CN201910585907.1A CN201910585907A CN110285553A CN 110285553 A CN110285553 A CN 110285553A CN 201910585907 A CN201910585907 A CN 201910585907A CN 110285553 A CN110285553 A CN 110285553A
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- power
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- conditioning
- rectifier bridge
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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
- F24F11/88—Electrical aspects, e.g. circuits
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of air-conditioning power measurement method, power-sensing circuit and air conditioners.The air-conditioning power measurement method is respectively calculated for the power of the every some components of air-conditioning, improves measuring accuracy.The present invention is respectively calculated by the power to the every some components of outdoor machine of air-conditioner, is apparent from the power of outdoor machine of air-conditioner each section loss, specifies direction towards low cost, low-power consumption and high-performance development for air-conditioner set.
Description
Technical field
The present invention relates to air-conditioning technical field more particularly to a kind of air-conditioning power measurement methods, power-sensing circuit and sky
Adjust device.
Background technique
Existing business air conditioner compressor mostly uses greatly frequency-changeable compressor.Frequency-changeable compressor every time start starting when, first with
Maximum power, maximum quantity of wind operation, make refrigeration equipment rapidly close to after set temperature, compressor is just in the slow-speed of revolution, low energy
It is operated under consumption state, the temperature of setting is only maintained with required power, this operational mode not only stablize by temperature, it is thus also avoided that pressure
Continually start-stop stops causing the decaying to the service life contracting machine, and power consumption is greatly reduced, and realizes energy-efficient purpose.Cause
This, frequency-changeable compressor has become the trend of commercial refrigerating device development.
Frequency-changeable compressor just develops towards the direction of high power density, low-loss, low cost, high reliablity at present.Wherein
Air-conditioning power is an important parameter for measuring air conditioning performance, and the power of especially outdoor machine of air-conditioner occupies business air conditioner unit total work
90% or more of rate.Existing convertible frequency air-conditioner does not calculate the function of itself consumption of electric power, if the electric-power metering outside
Device, such as power meter, voltameter detect the consumption of electric power of air-conditioning, and will increase the cost of air-conditioning.Moreover, existing function
Rate computing device is that complete machine considers power consumption, can not do to the power consumption of air-conditioning various pieces and accurately analyze.Therefore, high-precision sky
Unit electric quantity metering, the energy consumption of all parts are assessed in adjusting power metering, and reduce power consumption with important practical significance.
Summary of the invention
The present invention proposes a kind of air-conditioning power measurement method, power-sensing circuit and the air conditioner using this method, to mention
The accuracy of high-altitude adjusting power metering.
The present invention proposes that a kind of air-conditioning power measurement method, the power measurement method are directed to the every some components of air-conditioning
Power be respectively calculated, improve measuring accuracy.
In the present invention, the metering for outdoor machine of air-conditioner power includes driven compressor plate power and power rectifier bridge power.
The driving plate power is the product of DC bus current and busbar voltage.
The power rectifier bridge power be DC bus current square with rectifier bridge output positive and negative anodes between voltage regulation resistance
Product.
The present invention also proposes a kind of air-conditioning power-sensing circuit, including concatenated power rectifier bridge and driven compressor plate,
Further include one be serially connected between DC bus positive and negative anodes current sensor, be connected in parallel between DC bus positive and negative anodes voltage inspection
Survey device and power computation module.
The driven compressor plate includes the inverter IPM parallel with one another on DC bus, for by fan drive plate
The first interface CN1 being connected on driven compressor plate, the second interface CN2, Yi Jimu that are connected for switching power supply of frequency converter
Line energy capacitance set and balancing branch.
The bus energy capacitance set includes three groups of capacitive branch in parallel, two capacitors of contacting on every capacitive branch,
The balancing branch includes four concatenated resistance, draws a conducting wire between two capacitors on every capacitive branch and puts down with described
The middle part connection of weighing apparatus branch.
Preferably, it is in series with reactor and relay in the negative electrode bus connecting with power rectifier bridge DC output end, it should
Relay second switch SW2 and divider resistance R in parallel with first switch SW1 after including first switch SW1 and connecting.
Preferably, the power rectifier bridge DC output end is parallel with a voltage regulation resistance.
The present invention also proposes that a kind of air conditioner, the air conditioner have used above-mentioned air-conditioning power measurement method.
Compared with prior art, the invention has the following advantages:
The present invention is respectively calculated by the power to the every some components of outdoor machine of air-conditioner, obtains the outer machine function of High Precision Air-conditioning
Rate, power error is down within 3%；Be apparent from outdoor machine of air-conditioner each section loss power, be air-conditioner set towards it is low at
Originally, low-power consumption and high-performance development specify direction, have important practical significance to the functions such as unit electric quantity metering are increased.By
The power consumption of each component of air-conditioning can be accurately assessed in method proposed by the present invention, improves product competitiveness in the market.
Detailed description of the invention
Fig. 1 is outdoor machine of air-conditioner power circuit power calculation topological diagram.
Specific embodiment
In order to keep the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with drawings and examples to this hair
It is bright to be described in detail.It should be appreciated that following specific embodiments only to explain the present invention, do not constitute limit to the present invention
System.
As shown in Figure 1, outdoor machine of air-conditioner power circuit includes power rectifier bridge portion and driven compressor plate part.
Rectification bridge portion is composed in parallel by three groups of rectifier diode branches and voltage regulation resistance in parallel, every rectifier diode
Branch routes two rectifier diodes and is composed in series, and draws among every rectifier diode branch two concatenated rectifier diodes
Conducting wire L1, L2 and L3 are the input terminal of rectifier bridge three-phase alternating current, and the both ends of three groups of rectifier diode branches are that DC bus is defeated
Out, P is the output head anode of rectifier bridge, and N is the negative pole of output end of rectifier bridge, and three-phase alternating current is rectified into direct current through the rectifier bridge
Electricity.The voltage regulation resistance being connected in parallel on rectification bridge output end positive and negative anodes plays pressure stabilization function to power supply.Driving plate part is empty in Fig. 1
Frame portion, including the inverter IPM on bus, first interface CN1, second interface CN2 and bus energy storage parallel with one another
Capacitance group and balance resistance.IPM provides power supply to compressor, and first interface CN1 is fan drive plate on driven compressor plate
Connecting interface, second interface CN2 be switching power supply of frequency converter connecting interface.Bus energy capacitance set includes three groups of electricity in parallel
Hold branch, every branch road is equipped with two capacitors.Balancing branch includes four concatenated resistance, these resistance can consume part
The electric energy of energy capacitance set storage when air-conditioning is shut down.A conducting wire and balance branch are drawn on every capacitive branch between two capacitors
The middle part on road connects.When air-conditioning is started to work, the energy capacitance set in driving plate starts quick charge and discharges, to be pressure
Contracting machine and blower provide enough and stable voltage.Resistance on balancing branch can prevent energy capacitance set during discharge
Generate excessively high voltage damage air-conditioning equipment.
Reactor and relay are in series in the negative electrode bus of power rectifier bridge DC output end connection.Reactor can mistake
The higher hamonic wave in circuit is filtered, filtering is played the role of.Relay include first switch SW1 and series connection after with first switch
The second switch SW2 and divider resistance R of SW1 parallel connection carry out overvoltage protection to circuit.
Air-conditioning power measurement method proposed by the present invention is respectively calculated for the power of the every some components of air-conditioning, with
Improve measuring accuracy.
According to above-mentioned outdoor machine of air-conditioner control principle it is found that outdoor machine of air-conditioner power includes that driven compressor plate power and power supply are whole
Bridge power is flowed, the power as caused by the inductance characteristic of reactor L is reactive power, is not counted in outdoor machine of air-conditioner power calculation.
A current sensor is being concatenated between bus positive and negative anodes to accurately calculate the power present invention of each section, bus positive and negative anodes it
Between an in parallel voltage check device, additionally include a power measurement module.In the embodiment shown in fig. 1, defeated in rectifier bridge
It connects between outlet cathode N and reactor L a current sensor, for acquiring DC bus current, on bus positive and negative anodes
A voltage check device in parallel, for acquiring DC bus-bar voltage.Driving plate power is DC bus current and busbar voltage
Product IIt is femaleVIt is female, i.e. the power of dotted line frame in Fig. 1.The power that the part obtains not only includes the power of compressor, while also being wrapped
Include the power of blower and frequency converter and Switching Power Supply.Rectifier bridge conducting rectifier diode and voltage regulation resistance have portion of energy damage
Consumption, since the resistance value for the voltage regulation resistance being connected in parallel on rectification bridge output end positive and negative anodes is known to fixation, so rectifier bridge power
For DC bus current square rectifier bridge export positive and negative anodes between resistance product I2R.Power measurement module is according to acquisition
Bus current and voltage can be precisely calculated the power of rectifier bridge and driving plate.
Outdoor machine of air-conditioner power is the sum of driving plate power and rectifier bridge power, since the power of outdoor machine of air-conditioner occupies commercial sky
90% or more of aggregate capacity is adjusted, the present invention is respectively calculated by the power to the every some components of outdoor machine of air-conditioner, is obtained
The outer machine power of High Precision Air-conditioning, power error is down within 3%.Power calculation algorithms proposed by the present invention can be apparent from sky
The power of outer machine each section loss is adjusted, direction is specified towards low cost, low-power consumption and high-performance development for air-conditioner set, to increasing
Add the functions such as unit electric quantity metering that there is important practical significance.
The foregoing is merely a specific embodiment of the invention.It should be pointed out that it is all present inventive concept spirit and
Any modification, equivalent replacement and the variation made in frame, should all be included within protection scope of the present invention.
Claims (10)
1. a kind of air-conditioning power measurement method, which is characterized in that it is respectively calculated for the power of the every some components of air-conditioning,
Improve measuring accuracy.
2. metering method as described in claim 1, which is characterized in that the metering for outdoor machine of air-conditioner power includes that compressor drives
Movable plate power and power rectifier bridge power.
3. metering method as claimed in claim 2, which is characterized in that the driving plate power is DC bus current and bus
The product of voltage.
4. metering method as claimed in claim 2, which is characterized in that the power rectifier bridge power is DC bus current
Square rectifier bridge output positive and negative anodes between voltage regulation resistance product.
5. a kind of air-conditioning power-sensing circuit, including concatenated power rectifier bridge and driven compressor plate, which is characterized in that also wrap
Include one be serially connected between DC bus positive and negative anodes current sensor, be connected in parallel between DC bus positive and negative anodes voltage detecting dress
It sets and power computation module.
6. power-sensing circuit as claimed in claim 5, which is characterized in that the driven compressor plate include it is parallel with one another
Inverter IPM on DC bus, it the first interface CN1 for fan drive plate to be connected on driven compressor plate, is used for
The second interface CN2 and bus energy capacitance set and balancing branch of switching power supply of frequency converter connection.
7. power-sensing circuit as claimed in claim 6, which is characterized in that the bus energy capacitance set includes three groups in parallel
Capacitive branch, two capacitors of contacting on every capacitive branch, the balancing branch includes four concatenated resistance, every capacitor
A conducting wire is drawn between two capacitors in branch road to connect with the middle part of the balancing branch.
8. power-sensing circuit as claimed in claim 5, which is characterized in that is connect with power rectifier bridge DC output end is negative
Be in series with reactor and relay in the bus of pole, the relay include first switch SW1 and series connection after with first switch SW1
Second switch SW2 and divider resistance R in parallel.
9. power-sensing circuit as claimed in claim 5, which is characterized in that the power rectifier bridge DC output end is parallel with
One voltage regulation resistance.
10. a kind of air conditioner, which is characterized in that the air conditioner uses air-conditioning power meter described in 4 any bar of Claims 1-4
Amount method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910585907.1A CN110285553B (en) | 2019-07-01 | 2019-07-01 | Air conditioner power metering method, power detection circuit and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910585907.1A CN110285553B (en) | 2019-07-01 | 2019-07-01 | Air conditioner power metering method, power detection circuit and air conditioner |
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| CN110285553A true CN110285553A (en) | 2019-09-27 |
| CN110285553B CN110285553B (en) | 2020-12-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112984739A (en) * | 2021-04-08 | 2021-06-18 | 珠海格力电器股份有限公司 | Air conditioner control method, air conditioner control device, air conditioner and storage medium |
| CN115912899A (en) * | 2023-02-20 | 2023-04-04 | 广东东菱电源科技有限公司 | Capacitor series voltage division circuit |
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| CN108458457A (en) * | 2018-04-28 | 2018-08-28 | 广东美的制冷设备有限公司 | Transducer air conditioning circuit board, transducer air conditioning |
| CN109374963A (en) * | 2018-09-30 | 2019-02-22 | 四川长虹空调有限公司 | A kind of air-conditioning voltameter calculation method |
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2019
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| JP2003254591A (en) * | 2002-03-04 | 2003-09-10 | Mitsubishi Electric Corp | Driving circuit of air conditioner and driving circuit of electrical equipment |
| CN102857087A (en) * | 2012-09-17 | 2013-01-02 | 海信（山东）空调有限公司 | Adaptive control method of power factor |
| CN104181385A (en) * | 2013-05-24 | 2014-12-03 | 广东美的制冷设备有限公司 | Power detection method and power detection apparatus of air conditioner |
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| CN112984739A (en) * | 2021-04-08 | 2021-06-18 | 珠海格力电器股份有限公司 | Air conditioner control method, air conditioner control device, air conditioner and storage medium |
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| CN110285553B (en) | 2020-12-29 |
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