CN104181385A - Power detection method and power detection apparatus of air conditioner - Google Patents
Power detection method and power detection apparatus of air conditioner Download PDFInfo
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Abstract
The invention discloses a power detection apparatus of an air conditioner. The power detection apparatus comprises: a voltage sampling module, which is used for carrying out sampling on an input alternating current of an air conditioner to obtain a voltage instantaneous value of the input alternating current; a current sampling module, which is used for carrying out sampling on the input alternating current of the air conditioner to obtain a current instantaneous value of the input alternating current; a controller module, which is connected with the voltage sampling module and the current sampling module and is used for calculating power information of the air conditioner within a preset time period according to the voltage instantaneous value of the input alternating current and the current instantaneous value of the input alternating current; and a power supply module, which is used for converting the input alternating current into an output direct current with a preset voltage value and powers the voltage sampling module, the current sampling module, and the controller module. According to the power detection apparatus, power detection of the air conditioner is realized only by adding the voltage sampling module and the current sampling module to the original air conditioner circuit, so that the cost is substantially lowered. In addition, the invention also discloses a power detection method of the air conditioner.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly a kind of electric energy detection method of electric energy detection device of air conditioner and air conditioner.
Background technology
Along with improving constantly of energy prices, the energy consumption of air-conditioning more and more receives people's concern, and each air-conditioning producer is all strengthening the managerial research of air conditioning electricity.At present, existing other air-conditioning products band electric energy measurement function on market, is mainly to realize by increasing the mode of ammeter functional module.
In prior art, there is a kind of air conditioner power control device 1000, as shown in Figure 1, its module of installing and using band table metering IC on air-conditioning is external electric energy module, the information such as the electric current of sampling complete machine, voltage, the information such as realtime power of output complete machine, and information is sent to air-conditioning main control MCU, air-conditioning main control MCU, by receiving, analyze, respond these information, is adjusted the operational factor of air-conditioning, reaches energy-conservation object.
But there is following shortcoming in this technology:
1, adopt external electric energy module to need special ammeter computation chip and power circuit, cost is higher;
2, in external electric energy module, generally have independently RC resistance-capacitance depressurization power circuit, the reliability of this RC resistance-capacitance depressurization power circuit is low;
3, external electric energy module body is long-pending larger, during design, will guarantee enough electric clearances, and structure mounting design is complicated, is unfavorable for installing in air conditioner, especially in the split air conditioner of small volume.
And, because main control MCU in air conditioning chamber is all generally the Switching Power Supply that adopts isolation, be difficult to gather the voltage and current signal of complete machine, and 8 MCU controls of indoor main control MCU employing, the arithmetic capability of chip is inadequate, cannot effectively detect complete machine information about power.
In addition, the method that estimated current detects is: in sample circuit, adopt current transformer, the effect of current transformer is converted to by certain no-load voltage ratio the secondary current that numerical value is less the larger primary current of numerical value, and secondary current access ohmic load, is converted to voltage signal current signal.Chip Microcomputer A/D sampling pin carries out AD sampling to this voltage in real time.In the time of will bearing the maximum operation of air-conditioning due to current transformer, can reach electric current more than 20A, the electric current of the normal operation of air-conditioning is also A level.Larger by primary current in the situation that, the secondary current electric current of output is larger, and the voltage accuracy on Chip Microcomputer A/D sampling pin is higher; But less by primary current in the situation that (such as air-conditioning in air supply pattern operation etc.), the secondary current of output is less, change in voltage on Chip Microcomputer A/D sampling pin is less, if single-chip microcomputer is when the little electric current operation of air-conditioning, by this mode sample rate current, carry out electric weight computing, result often error is larger.
Summary of the invention
Object of the present invention is intended at least solve one of above-mentioned technological deficiency.
For this reason, one object of the present invention is to propose a kind of electric energy detection device of air conditioner, only need on former air-condition circuits, increase voltage sample module and current sample module just can realize the electric energy detection of air conditioner, greatly reduces cost.
Another object of the present invention is to propose a kind of electric energy detection method of air conditioner.
For achieving the above object, the electric energy detection device of a kind of air conditioner that one aspect of the present invention embodiment proposes, comprising: voltage sample module, for the input AC electricity to air conditioner, sample to obtain the instantaneous voltage of described input AC electricity; Current sample module, samples to obtain the current instantaneous value of described input AC electricity for the input AC electricity to described air conditioner; Controller module, described controller module is connected with current sample module with described voltage sample module, and described controller module calculates the energy information of described air conditioner in Preset Time section according to the current instantaneous value of the instantaneous voltage of described input AC electricity and described input AC electricity; And power module, for described input AC electricity being converted to the output direct current of predeterminated voltage value, and be that described voltage sample module, described current sample module and described controller module are powered by described output direct current.
According to the electric energy detection device of the air conditioner of the embodiment of the present invention, only need on original air-condition circuits, increase voltage sample module and current sample module, do not need extra power supply and control chip, utilize performance and the ardware feature that controller module is stronger just can realize the electric energy detection to air conditioner, by the energy information detecting, realize the Energy Saving Control to air conditioner, therefore reduced the area of electric-controlled plate, greatly reduced the cost of system, and improved the reliability of system.
In one embodiment of the invention, described current sample module comprises: current transformer, and the primary coil of described current transformer is connected with the input AC of described air conditioner electricity; The first resistance, described the first resistance is connected in parallel on the two ends of the secondary coil of described current transformer; The first amplifier, the in-phase input end of described the first amplifier is connected with the positive terminal of the secondary coil of described current transformer, the inverting input of described the first amplifier is connected with the output terminal of described the first amplifier, and the output terminal of described the first amplifier is connected with the first current detecting end of described controller module; The second resistance, one end of described the second resistance is connected respectively with the output terminal of described the first amplifier with the inverting input of described the first amplifier, the other end ground connection of described the second resistance; The second amplifier, the in-phase input end of described the second amplifier is connected with the output direct current of described predeterminated voltage value, after the inverting input of described the second amplifier is connected with the output terminal of described the second amplifier, is connected with the negative pole end of the secondary coil of described current transformer; The 3rd amplifier, the in-phase input end of described the 3rd amplifier is connected with the output terminal of described the first amplifier, the inverting input of described the 3rd amplifier is connected with the output terminal of described the second amplifier, and the output terminal of described the 3rd amplifier is connected with the second current detecting end of described controller module; The 3rd resistance, one end of described the 3rd resistance is connected with the inverting input of described the 3rd amplifier, and the other end of described the 3rd resistance is connected with the output terminal of described the 3rd amplifier.
And described current sample module also comprises the first capacitance-resistance filter unit, described the first capacitance-resistance filter unit is connected between the positive terminal of secondary coil and the in-phase input end of described the first amplifier of described current transformer.
In one embodiment of the invention, described controller module obtains respectively the current instantaneous value of described current sample module samples according to described the first current detecting end and described the second current detecting end, and according to described instantaneous voltage and the current instantaneous value that obtains by described the second current detecting end, calculates the energy information of described air conditioner in Preset Time section when the current instantaneous value obtaining by described the second current detecting end is less than preset value.
In one embodiment of the invention, described voltage sample module comprises: rectifier bridge, and the input end of described rectifier bridge is connected with the input AC of described air conditioner electricity; The 4th resistance, described the 4th one end of resistance and the positive output end of described rectifier bridge are connected; The 5th resistance, one end of described the 5th resistance is connected with the other end of described the 4th resistance, and described the 5th other end of resistance and the negative output terminal of described rectifier bridge are connected respectively with ground; Bilateral diode, is connected with the other end of described the 5th resistance after the first end of described bilateral diode is connected with the second end, the 3rd end ground connection of described bilateral diode, and the 4th end of described bilateral diode is connected with the output direct current of described predeterminated voltage value; Form the 6th resistance and first electric capacity of the second capacitance-resistance filter unit, one end of described the 6th resistance is connected with the other end of described the 5th resistance, the other end of described the 6th resistance is connected with one end of described the first electric capacity, the other end ground connection of described the first electric capacity, the node between described the 6th resistance and the first electric capacity is connected with the voltage detecting end of described controller module.
Particularly, in an example of the present invention, described power module is non-isolation type Switching Power Supply.
In one embodiment of the invention, described energy information comprises voltage effective value, current effective value, active power, applied power and power factor.
Wherein, described controller module calculates the described voltage effective value in described Preset Time section according to following formula:
Wherein, V is described voltage effective value, the number of n for sampling in described Preset Time section, and n is more than or equal to 1 integer, is v(k) described instantaneous voltage.
Described controller module calculates the described current effective value in described Preset Time section according to following formula:
Wherein, I is described voltage effective value, i(k) is described current instantaneous value.
Described controller module calculates the described active power in described Preset Time section according to following formula:
Wherein, P
jfor described active power.
For achieving the above object, the electric energy detection method of the present invention's a kind of air conditioner that embodiment proposes on the other hand, comprises the steps: that voltage sample module samples to obtain the instantaneous voltage of described input AC electricity to the input AC electricity of air conditioner; Current sample module samples to obtain the current instantaneous value of described input AC electricity to the input AC electricity of described air conditioner; And controller module calculates the energy information of described air conditioner in Preset Time section according to the current instantaneous value of the instantaneous voltage of described input AC electricity and described input AC electricity.
According to the electric energy detection method of the air conditioner of the embodiment of the present invention, utilize performance and the ardware feature that controller module is stronger just can realize the electric energy detection to air conditioner, by the energy information detecting, realize the Energy Saving Control to air conditioner, thereby realize low cost and realize electric energy detection, and accuracy of detection is high, reliability is high.
In one embodiment of the invention, the electric energy detection method of described air conditioner also comprises: described current sample module is sampled and obtained respectively the first current instantaneous value and the second current instantaneous value the input AC electricity of described air conditioner; Described controller module judges whether described the second current instantaneous value is less than preset value; If so, described controller module calculates the energy information of described air conditioner in Preset Time section according to described the second current instantaneous value and described instantaneous voltage.
When the second current instantaneous value detecting is less than preset value, according to the second current instantaneous value and instantaneous voltage, calculate energy information, the accuracy that has greatly improved electric energy detection.
The aspect that the present invention is additional and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage will become from the following description of the accompanying drawings of embodiments and obviously and easily understand, wherein:
Fig. 1 is the schematic diagram of a kind of air conditioner power control device of prior art;
Fig. 2 is according to the block diagram of the electric energy detection device of the air conditioner of the embodiment of the present invention;
Fig. 3 A-Fig. 3 D is the decomposition circuit schematic diagram of the electric energy detection device of air conditioner according to an embodiment of the invention;
Fig. 4 and Fig. 5 are the oscillogram of two kinds of voltage samples; And
Fig. 6 is according to the process flow diagram of the electric energy detection method of the air conditioner of the embodiment of the present invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
Disclosing below provides many different embodiment or example to be used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the present invention.In addition, the present invention can be in different examples repeat reference numerals and/or letter.This repetition is in order to simplify and object clearly, itself do not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique the invention provides and the example of material, but those of ordinary skills can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, First Characteristic described below Second Characteristic it " on " structure can comprise that the first and second Characteristics creations are for the direct embodiment of contact, also can comprise the embodiment of other Characteristics creation between the first and second features, such the first and second features may not be direct contacts.
In description of the invention, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, for example, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be to be directly connected, and also can indirectly be connected by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
With reference to description and accompanying drawing below, these and other aspects of embodiments of the invention will be known.These describe and accompanying drawing in, specifically disclose some specific implementations in embodiments of the invention, represent to implement some modes of the principle of embodiments of the invention, still should be appreciated that the scope of embodiments of the invention is not limited.On the contrary, embodiments of the invention comprise spirit and all changes within the scope of intension, modification and the equivalent that falls into additional claims.
The electric energy detection device of air conditioner and the electric energy detection method of air conditioner that the embodiment of the present invention proposes are described with reference to the accompanying drawings.
Fig. 2 is according to the block diagram of the electric energy detection device of the air conditioner of the embodiment of the present invention.As shown in Figure 2, the electric energy detection device of this air conditioner comprises voltage sample module 10, current sample module 20, controller module 30 and power module 40.
Wherein, voltage sample module 10 samples to obtain the instantaneous voltage of input AC electricity for the input AC electricity (L, N) to air conditioner, current sample module 20 samples to obtain the current instantaneous value of described input AC electricity for the input AC electricity (L, N) to air conditioner.Controller module 30 is connected with current sample module 20 with voltage sample module 10, and controller module 30 calculates the energy information of described air conditioner in Preset Time section according to the current instantaneous value of the instantaneous voltage of described input AC electricity and described input AC electricity.Power module 40 for input AC electricity (L, N) is converted to predeterminated voltage value for example+the output direct current of 5V/+3.3V, and be that voltage sample module 10, current sample module 20 and controller module 30 are powered by this output direct current.
In addition, as shown in Figure 2, controller module 30 is also connected respectively with protection module 50, communication control module 60, compressor control module 70, wind-guiding control module 80, air-blower control module 90 and temperature sampling module 100.
In one embodiment of the invention, as shown in Fig. 2 or Fig. 3 A, power module 40 is non-isolation type Switching Power Supply, and the physical circuit of non-isolation type Switching Power Supply as shown in Figure 3A.It is that air-conditioning main control MCU provides non-isolation+5V/+3.3V operating voltage to controller module 30 that this non-isolation type Switching Power Supply is used for.
Wherein, the ARMCortex-M3 kernel of the integrated embedded Flash of controller module 30 and SRAM storer.Compare with 8/16 equipment, ARM Cortex-M332 position risc processor provides higher code efficiency.The maximum operation frequency of controller module 30 is 72MHz, and 1.25DMIPS/MHz has the computing function of monocycle multiplication and hardware division.And controller module 30 has the A/D converter (16 passage) of the us level of 2 12, and its A/D measurement range is 0-3.6V, there is two samplings and hold facility.
Therefore, the controller module 30 of the embodiment of the present invention has stronger performance and ardware feature, especially has computing ability at a high speed, and its physical circuit as shown in Figure 3 B.
In one embodiment of the invention, as shown in Figure 3 C, current sample module 20 comprises current transformer T1, the first resistance R 1, the first amplifier U1A, the second resistance R 2, the second amplifier U1B, the 3rd amplifier U1C and the 3rd resistance R 3.Wherein, the primary coil of current transformer T1 is connected with the input AC of air conditioner electricity, and the first resistance R 1 is connected in parallel on the two ends of the secondary coil of current transformer T1.The in-phase input end of the first amplifier U1A is connected with the positive terminal of the secondary coil of current transformer T1, the inverting input of the first amplifier U1A is connected with the output terminal of the first amplifier U1A, and the output terminal of the first amplifier U1A is connected with the first current detecting end AC_Current of controller module 30.One end of the second resistance R 2 is connected respectively with the output terminal of the first amplifier U1A with the inverting input of the first amplifier U1A, the other end ground connection of the second resistance R 2.The in-phase input end of the second amplifier U1B through resistance and predeterminated voltage value for example the output direct current of 5V be connected, after the inverting input of the second amplifier U1B is connected with the output terminal of the second amplifier U1B, be connected with the negative pole end of the secondary coil of current transformer T1.The in-phase input end of the 3rd amplifier U1C is connected with the output terminal of the first amplifier U1A, the inverting input of the 3rd amplifier U1C is connected with the output terminal of the second amplifier U1B through resistance, and the output terminal of the 3rd amplifier U1C is connected with the second current detecting end Sandby of controller module 30.One end of the 3rd resistance R 3 is connected with the inverting input of the 3rd amplifier U1C, and the other end of the 3rd resistance R 3 is connected with the output terminal of the 3rd amplifier U1C.
And current sample module 20 also comprises that 201, the first capacitance-resistance filter unit 201, the first capacitance-resistance filter unit are connected between the positive terminal of secondary coil and the in-phase input end of the first amplifier U1A of current transformer T1.Wherein, current transformer T1 can be isolated form high precision current transformer.
That is to say, current sample module 20 is for making Current Transformer T1 that the large electric current of input is converted into little current signal, it is that the first resistance R 1 is as load that the output of current transformer T1 connects a rated resistance, little current signal is converted to voltage signal, improve the reference voltage of the negative pole end of current transformer T1 output, guarantee the positive terminal signal of current transformer T1 output.The in-phase input end of the anodal termination first amplifier U1A of T1 output, the first amplifier U1A is as voltage follower, it is conventional current detection signal that the output terminal of the first amplifier U1A is exported the first current detection signal, and the first current detecting end AC_Current(AD that outputs to controller module 30 detects mouth).The output terminal of the first amplifier U1A also outputs to the in-phase input end of the 3rd amplifier U1C, it is little current detection signal that the output terminal of the 3rd amplifier U1C is exported the second current detection signal, and the second current detecting end Sandby(AD that outputs to controller module 30 detects mouth).
Because the power variation range of air conditioner operation is larger, tradition electricity quantity module adopts the method for conventional electric resistance partial pressure sample rate current signal, under little electric current running status, there is relatively large deviation in sampled data, causes the electric quantity data that detects under little electric current running status inaccurate.Therefore the sampling of the current detecting of the embodiment of the present invention realizes by multistage operations amplifying circuit, greatly improves the accuracy of current detecting.
As shown in Figure 3 D, voltage sample module 10 comprises rectifier bridge 101, the 4th resistance R 4, the 5th resistance R 5, bilateral diode D1, the 6th resistance R 6 and the first capacitor C 1.Wherein, the input end of rectifier bridge 101 (2,3) is connected with the input AC electricity (L, N) of air conditioner, one end of the 4th resistance R 4 is connected with the positive output end 1 of rectifier bridge 101, one end of the 5th resistance R 5 is connected with the other end of the 4th resistance R 4, and the other end of the 5th resistance R 5 is connected respectively with ground with the negative output terminal 4 of rectifier bridge 101.After being connected with the second end, the first end of bilateral diode D1 is connected with the other end of the 5th resistance R 5, the 3rd end ground connection of bilateral diode D1, and the 4th end of bilateral diode D1 and predeterminated voltage value for example the output direct current of 5V are connected.
The 6th resistance R 6 and the first capacitor C 1 form the second capacitance-resistance filter unit 102, one end of the 6th resistance R 6 is connected with the other end of the 5th resistance R 5, the other end of the 6th resistance R 6 is connected with one end of the first capacitor C 1, the other end ground connection of the first capacitor C 1, the node between the 6th resistance R 6 and the first capacitor C 1 is connected with the voltage detecting end Udc_Input of controller module 30.
That is to say, voltage sample module 10 is passed through rectifier bridge 101 output dc voltage after the ac voltage rectifiers of input, the power supply of the negative pole of the DC voltage after rectification and controller module 20 altogether, by outputing to the voltage detecting end Udc_Input(AD of controller module after electric resistance partial pressure, resistance-capacitance circuit filtering, detect mouth), for real-time voltage signal being provided to controller module 30.Wherein, rectifier bridge 101 can be half-wave rectifying circuit or bridge rectifier circuit.
In an embodiment of the present invention, controller module 30 obtains respectively the current instantaneous value of current sample module 20 samplings according to described the first current detecting end and described the second current detecting end, and according to described instantaneous voltage and the current instantaneous value that obtains by described the second current detecting end, calculates the energy information of described air conditioner in Preset Time section when the current instantaneous value obtaining by described the second current detecting end is less than preset value.In some embodiments of the invention, energy information can comprise voltage effective value, current effective value, active power, applied power and power factor.
Particularly, controller module 30 each while in moment sampled voltage signal, conventional current signal and little current detection signal.Controller module 30 carries out electric weight calculating according to the running status of air conditioner and two current detecting data.For example, when the running status of air conditioner is refrigeration compressor unlatching, because the running current of current air conditioner is large, controller module 30 calculates electric weight and selects conventional current detection sampled data.Under refrigeration mode when compressor cuts out, the running current of air conditioner is little, when controller module 30 calculates electric weight, select little current sampling data, for example running state of air conditioner is air supply pattern, this pattern lower compression machine is closed condition, and controller module 30 calculates electric weight and selects little current detecting sampled data.Wherein, if little current detecting data are less than preset value, controller module 30 judgement air conditioners are in low power operation state, and controller module 30 calculates electric weight and selects little current detecting sampled data.
During controller module 30 sampling, in order to obtain high-precision voltage, electric current and power signal, controller module 30 need to detect by AD an instantaneous value for mouth high speed acquisition voltage and current, and sample frequency generally will be higher than 5K/ second.
After sampling instantaneous voltage and current instantaneous value, the following formula calculating voltage effective value of controller module 30 basis:
Wherein, V is voltage effective value, and T is the sampling period, v(t) is instantaneous voltage.
In one embodiment of the invention, the waveform of voltage sample is as shown in Fig. 4 or Fig. 5, and by discrete sampling, calculating in described Preset Time section is the voltage effective value in sampling period signal, and formula is:
Wherein, V is described voltage effective value, the number of n for sampling in described Preset Time section, and n is more than or equal to 1 integer, is v(k) described instantaneous voltage.
In a concrete example of the present invention, sampling period T=T2-T1, the number n=100 of sampled point in the cycle, the data of sampling are as shown in table 1 below.
Table 1
| Sampled point | 1 | 2 | …… | 100 |
| Instantaneous voltage (V) | 330 | 325 | …… | 330 |
Sampled data substitution formula (2) is calculated:
And controller module 30 calculates current effective value according to following formula:
Wherein, I is current effective value, and T is the sampling period, i(t) is current instantaneous value.
Similarly, by discrete sampling, calculating in described Preset Time section is the current effective value in sampling period signal, and formula is:
Wherein, I is described current effective value, the number of n for sampling in described Preset Time section, and n is more than or equal to 1 integer, is i(k) described current instantaneous value.
In a concrete example of the present invention, sampling period T=T2-T1, the number n=100 of sampled point in the cycle, the data of sampling are as shown in table 2 below.
Table 2
| Sampled point | 1 | 2 | …… | 100 |
| Current instantaneous value (A) | 5.5 | 5.4 | …… | 5.5 |
Sampled data substitution formula (4) is calculated:
In addition, controller module 30 also calculates active power according to following formula:
Similarly, by discrete sampling, calculating in described Preset Time section is the active power in sampling period signal, and formula is:
Wherein, P
jfor described active power.
Sampled data substitution formula (6) in above table is calculated:
P=（330*5.5+325*5.4……+330*5.5）/100=790W。
The computing formula of applied power is:
S=V*I （7）
The computing formula of power factor is:
So, by the above-mentioned data substitution formula (8) calculating, can calculate:
Therefore, as from the foregoing, controller module 30 can calculate the energy informations such as voltage effective value, current effective value, active power, applied power, power factor.
According to the electric energy detection device of the air conditioner of the embodiment of the present invention, only need on original air-condition circuits, increase voltage sample module and current sample module, do not need extra power supply and control chip, utilize performance and the ardware feature that controller module is stronger just can realize the electric energy detection to air conditioner, by the energy information detecting, realize the Energy Saving Control to air conditioner, therefore reduced the area of electric-controlled plate, greatly reduced the cost of system, and improved the reliability of system.
Fig. 6 is according to the process flow diagram of the electric energy detection method of the air conditioner of the embodiment of the present invention.As shown in Figure 6, the electric energy detection method of this air conditioner comprises the steps:
S1, voltage sample module samples to obtain the instantaneous voltage of input AC electricity to the input AC electricity of air conditioner.
S2, current sample module samples to obtain the current instantaneous value of input AC electricity to the input AC electricity of air conditioner.
S3, controller module calculates the energy information of air conditioner in Preset Time section according to the current instantaneous value of the instantaneous voltage of input AC electricity and input AC electricity.
Particularly, controller module according to the formula of foregoing description (1) to (8) can calculating voltage effective value, the energy information such as current effective value, active power, applied power and power factor.
The electric energy detection method of air conditioner of the present invention, is a kind of brand-new detection method proposing for the deficiency of the existing electric energy detection device of air-conditioning, can reduce electric-controlled plate area, improves reliability and also reduces system cost.
In one embodiment of the invention, the electric energy detection method of described air conditioner also comprises: described current sample module is sampled and obtained respectively the first current instantaneous value and the second current instantaneous value the input AC electricity of described air conditioner; Described controller module judges whether described the second current instantaneous value is less than preset value; If so, described controller module calculates the energy information of described air conditioner in Preset Time section according to described the second current instantaneous value and described instantaneous voltage.
When the second current instantaneous value detecting is less than preset value, according to the second current instantaneous value and instantaneous voltage, calculate energy information, the accuracy that has greatly improved electric energy detection.
According to the electric energy detection method of the air conditioner of the embodiment of the present invention, utilize performance and the ardware feature that controller module is stronger just can realize the electric energy detection to air conditioner, by the energy information detecting, realize the Energy Saving Control to air conditioner, thereby realize low cost and realize electric energy detection, and accuracy of detection is high, reliability is high.
In process flow diagram or any process of otherwise describing at this or method describe and can be understood to, represent to comprise that one or more is for realizing module, fragment or the part of code of executable instruction of the step of specific logical function or process, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can be not according to order shown or that discuss, comprise according to related function by the mode of basic while or by contrary order, carry out function, this should be understood by embodiments of the invention person of ordinary skill in the field.
The logic and/or the step that in process flow diagram, represent or otherwise describe at this, for example, can be considered to for realizing the sequencing list of the executable instruction of logic function, may be embodied in any computer-readable medium, for instruction execution system, device or equipment (as computer based system, comprise that the system of processor or other can and carry out the system of instruction from instruction execution system, device or equipment instruction fetch), use, or use in conjunction with these instruction execution systems, device or equipment.With regard to this instructions, " computer-readable medium " can be anyly can comprise, storage, communication, propagation or transmission procedure be for instruction execution system, device or equipment or the device that uses in conjunction with these instruction execution systems, device or equipment.The example more specifically of computer-readable medium (non-exhaustive list) comprises following: the electrical connection section (electronic installation) with one or more wirings, portable computer diskette box (magnetic device), random-access memory (ram), ROM (read-only memory) (ROM), the erasable ROM (read-only memory) (EPROM or flash memory) of editing, fiber device, and portable optic disk ROM (read-only memory) (CDROM).In addition, computer-readable medium can be even paper or other the suitable medium that can print described program thereon, because can be for example by paper or other media be carried out to optical scanning, then edit, decipher or process in electronics mode and obtain described program with other suitable methods if desired, be then stored in computer memory.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, a plurality of steps or method can realize with being stored in storer and by software or the firmware of suitable instruction execution system execution.For example, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: have for data-signal being realized to the discrete logic of the logic gates of logic function, the special IC with suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is to come the hardware that instruction is relevant to complete by program, described program can be stored in a kind of computer-readable recording medium, this program, when carrying out, comprises step of embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, can be also that the independent physics of unit exists, and also can be integrated in a module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and also can adopt the form of software function module to realize.If described integrated module usings that the form of software function module realizes and during as production marketing independently or use, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium of mentioning can be ROM (read-only memory), disk or CD etc.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is by claims and be equal to and limit.
Claims (12)
1. an electric energy detection device for air conditioner, is characterized in that, comprising:
Voltage sample module, samples to obtain the instantaneous voltage of described input AC electricity for the input AC electricity to air conditioner;
Current sample module, samples to obtain the current instantaneous value of described input AC electricity for the input AC electricity to described air conditioner;
Controller module, described controller module is connected with current sample module with described voltage sample module, and described controller module calculates the energy information of described air conditioner in Preset Time section according to the current instantaneous value of the instantaneous voltage of described input AC electricity and described input AC electricity; And
Power module for described input AC electricity being converted to the output direct current of predeterminated voltage value, and is that described voltage sample module, described current sample module and described controller module are powered by described output direct current.
2. the electric energy detection device of air conditioner as claimed in claim 1, is characterized in that, described current sample module comprises:
Current transformer, the primary coil of described current transformer is connected with the input AC of described air conditioner electricity;
The first resistance, described the first resistance is connected in parallel on the two ends of the secondary coil of described current transformer;
The first amplifier, the in-phase input end of described the first amplifier is connected with the positive terminal of the secondary coil of described current transformer, the inverting input of described the first amplifier is connected with the output terminal of described the first amplifier, and the output terminal of described the first amplifier is connected with the first current detecting end of described controller module;
The second resistance, one end of described the second resistance is connected respectively with the output terminal of described the first amplifier with the inverting input of described the first amplifier, the other end ground connection of described the second resistance;
The second amplifier, the in-phase input end of described the second amplifier is connected with the output direct current of described predeterminated voltage value, after the inverting input of described the second amplifier is connected with the output terminal of described the second amplifier, is connected with the negative pole end of the secondary coil of described current transformer;
The 3rd amplifier, the in-phase input end of described the 3rd amplifier is connected with the output terminal of described the first amplifier, the inverting input of described the 3rd amplifier is connected with the output terminal of described the second amplifier, and the output terminal of described the 3rd amplifier is connected with the second current detecting end of described controller module;
The 3rd resistance, one end of described the 3rd resistance is connected with the inverting input of described the 3rd amplifier, and the other end of described the 3rd resistance is connected with the output terminal of described the 3rd amplifier.
3. the electric energy detection device of air conditioner as claimed in claim 2, it is characterized in that, described current sample module also comprises the first capacitance-resistance filter unit, and described the first capacitance-resistance filter unit is connected between the positive terminal of secondary coil and the in-phase input end of described the first amplifier of described current transformer.
4. the electric energy detection device of air conditioner as claimed in claim 1, is characterized in that, described voltage sample module comprises:
Rectifier bridge, the input end of described rectifier bridge is connected with the input AC of described air conditioner electricity;
The 4th resistance, described the 4th one end of resistance and the positive output end of described rectifier bridge are connected;
The 5th resistance, one end of described the 5th resistance is connected with the other end of described the 4th resistance, and described the 5th other end of resistance and the negative output terminal of described rectifier bridge are connected respectively with ground;
Bilateral diode, is connected with the other end of described the 5th resistance after the first end of described bilateral diode is connected with the second end, the 3rd end ground connection of described bilateral diode, and the 4th end of described bilateral diode is connected with the output direct current of described predeterminated voltage value;
Form the 6th resistance and first electric capacity of the second capacitance-resistance filter unit, one end of described the 6th resistance is connected with the other end of described the 5th resistance, the other end of described the 6th resistance is connected with one end of described the first electric capacity, the other end ground connection of described the first electric capacity, the node between described the 6th resistance and the first electric capacity is connected with the voltage detecting end of described controller module.
5. the electric energy detection device of air conditioner as claimed in claim 3, it is characterized in that, described controller module obtains respectively the current instantaneous value of described current sample module samples according to described the first current detecting end and described the second current detecting end, and according to described instantaneous voltage and the current instantaneous value that obtains by described the second current detecting end, calculates the energy information of described air conditioner in Preset Time section when the current instantaneous value obtaining by described the second current detecting end is less than preset value.
6. the electric energy detection device of air conditioner as claimed in claim 1, is characterized in that, described power module is non-isolation type Switching Power Supply.
7. the electric energy detection device of air conditioner as claimed in claim 1, is characterized in that, described energy information comprises voltage effective value, current effective value, active power, applied power and power factor.
8. the electric energy detection device of air conditioner as claimed in claim 7, is characterized in that, described controller module calculates the described voltage effective value in described Preset Time section according to following formula:
Wherein, V is described voltage effective value, the number of n for sampling in described Preset Time section, and n is more than or equal to 1 integer, is v(k) described instantaneous voltage.
9. the electric energy detection device of air conditioner as claimed in claim 8, is characterized in that, described controller module calculates the described current effective value in described Preset Time section according to following formula:
Wherein, I is described voltage effective value, i(k) is described current instantaneous value.
10. the electric energy detection device of air conditioner as claimed in claim 9, is characterized in that, described controller module calculates the described active power in described Preset Time section according to following formula:
Wherein, P
jfor described active power.
The electric energy detection method of 11. 1 kinds of air conditioners, is characterized in that, comprises the steps:
Voltage sample module samples to obtain the instantaneous voltage of described input AC electricity to the input AC electricity of air conditioner;
Current sample module samples to obtain the current instantaneous value of described input AC electricity to the input AC electricity of described air conditioner; And
Controller module calculates the energy information of described air conditioner in Preset Time section according to the current instantaneous value of the instantaneous voltage of described input AC electricity and described input AC electricity.
The electric energy detection method of 12. air conditioners as claimed in claim 11, is characterized in that, also comprises:
Described current sample module is sampled and is obtained respectively the first current instantaneous value and the second current instantaneous value the input AC electricity of described air conditioner;
Described controller module judges whether described the second current instantaneous value is less than preset value;
If so, described controller module calculates the energy information of described air conditioner in Preset Time section according to described the second current instantaneous value and described instantaneous voltage.
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