CN203310908U - Electric energy detection device for air conditioner - Google Patents

Abstract

The utility model discloses an electric energy detection device for an air conditioner, and the detection device comprises: a voltage sampling module which is used for sampling an input alternating current of the air conditioner to obtain a voltage instantaneous value of the input alternating current; a current sampling module which is used for sampling 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 electric energy information in a preset time of the air conditioner is calculated according to the voltage instantaneous value of the input alternating current and the current instantaneous value of the input alternating current; a power module which is used for converting the input alternating current into an output direct current with a preset voltage value to supply power for the voltage sampling module, the current sampling module and the controller module. According to the utility model, only the voltage sampling module and the current sampling module are needed to add to the circuit of a conventional air conditioner, so as to complete the electric energy detection of the air conditioner, thereby greatly reducing cost.

Description

The electric energy detection device of air conditioner

Technical field

The utility model relates to air-conditioning technical field, particularly a kind of electric energy detection device of 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, be mainly to realize by the mode that increases the ammeter functional module.

In prior art, a kind of air conditioner power control device 1000 is arranged, 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 the air-conditioning main control MCU, the air-conditioning main control MCU, by receiving, analyze, respond these information, is adjusted the operational factor of air-conditioning, reaches energy-conservation purpose.

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, independently RC resistance-capacitance depressurization power circuit is generally arranged on external electric energy module, the reliability of this RC resistance-capacitance depressurization power circuit is low;

3, external electric energy module body is long-pending larger, will guarantee enough electric clearances during design, and structure mounting design complexity, be 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 to adopt the Switching Power Supply of 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, can't effectively detect the 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 to the larger primary current of numerical value, and secondary current access ohmic load, be converted to voltage signal to current signal.Chip Microcomputer A/D sampling pin carries out the AD sampling to this voltage in real time.In the time of due to current transformer, will bearing the maximum operation of air-conditioning, can reach the electric current more than 20A, the electric current of the normal operation of air-conditioning is also the A level.In the situation that larger by primary current, the secondary current electric current of output is larger, and the voltage accuracy on Chip Microcomputer A/D sampling pin is higher; But in the situation that by primary current less (such as air-conditioning, being 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 the electric weight computing, result often error is larger.

The utility model content

The purpose of this utility model is intended to solve at least one of above-mentioned technological deficiency.

For this reason, a purpose of the present utility model is to propose a kind of electric energy detection device of air conditioner, only need on former air-condition circuits, increase the voltage sample module and the current sample module just can realize the electric energy detection of air conditioner, greatly reduces cost.

For achieving the above object, the electric energy detection device of a kind of air conditioner the utility model proposes comprises: the voltage sample module of the input AC electricity of air conditioner being sampled to obtain to the instantaneous voltage of described input AC electricity; The input AC electricity of described air conditioner is sampled to obtain to the current sample module of the current instantaneous value of described input AC electricity; Controller module, described controller module is connected with the current sample module with described voltage sample module, and described controller module calculates the energy information of described air conditioner in the Preset Time section according to the instantaneous voltage of described input AC electricity and the current instantaneous value of described input AC electricity; And the galvanic power module of output that described input AC electricity is converted to the predeterminated voltage value, power module is described is described voltage sample module, described current sample module and the power supply of described controller module by described output direct current.

Electric energy detection device according to the air conditioner of the utility model embodiment, 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 detected, 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.

Wherein, 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, an 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, the inverting input of described the second amplifier with the negative pole end of the secondary coil of described current transformer, be connected after the output terminal of described the second amplifier is connected; 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, an 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 in-phase input end of the positive terminal of secondary coil of described current transformer and described the first amplifier.

Preferably, 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 with by the current instantaneous value that described the second current detecting end obtains, calculates the energy information of described air conditioner in the Preset Time section when the current instantaneous value obtained by described the second current detecting end is less than preset value.

Further, 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, an end of described the 4th resistance is connected with the positive output end of described rectifier bridge; The 5th resistance, an end of described the 5th resistance is connected with the other end of described the 4th resistance, and the other end of described the 5th resistance is connected respectively with ground with the negative output terminal of described rectifier bridge; Bilateral diode, the first end of described bilateral diode with the other end of described the 5th resistance, be connected after the second end is connected, the 3rd end ground connection of described bilateral diode, 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 an 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.

Preferably, described power module is the non-isolation type Switching Power Supply.

Preferably, 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:

$V=\sqrt{\frac{1}{n}\underset{k=0}{\overset{n-1}{\mathrm{\Σ}}}{\left[v\left(k\right)\right]}^2}$

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:

$I=\sqrt{\frac{1}{n}\underset{k=0}{\overset{n-1}{\mathrm{\Σ}}}{\left[i\left(k\right)\right]}^2}$

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:

$P_j=\frac{1}{n}\underset{k=0}{\overset{n-1}{\mathrm{\Σ}}}v\left(k\right)i\left(k\right)$

Wherein, P _jFor described active power.

The aspect that the utility model is additional and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present utility model.

The accompanying drawing explanation

Above-mentioned and/or the additional aspect of the utility model 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 the block diagram according to the electric energy detection device of the air conditioner of the utility model embodiment;

Fig. 3 A-Fig. 3 D is the decomposition circuit schematic diagram according to the electric energy detection device of the air conditioner of an embodiment of the utility model;

Fig. 4 and Fig. 5 are the oscillogram of two kinds of voltage samples; And

Fig. 6 is the process flow diagram according to the electric energy detection method of the air conditioner of the utility model embodiment.

Embodiment

Below describe embodiment of the present utility model in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label means same or similar element or the element with identical or similar functions from start to finish.Below by the embodiment be described with reference to the drawings, be exemplary, only be used to explaining the utility model, and can not be interpreted as restriction of the present utility model.

Disclosing hereinafter provides many different embodiment or example to be used for realizing different structure of the present utility model.Of the present utility model open in order to simplify, hereinafter parts and the setting of specific examples are described.Certainly, they are only example, and purpose does not lie in restriction the utility model.In addition, the utility model can be in different examples repeat reference numerals and/or letter.This repetition is in order to simplify and purpose clearly, itself do not indicate the relation between the various embodiment of discuss and/or setting.In addition, the various specific technique that the utility model 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 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 present utility model, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be done broad understanding, for example, can be mechanical connection or electrical connection, can be also the connection of two element internals, can be directly to be 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 following description and accompanying drawing, by these and other aspects of clear embodiment of the present utility model.In these descriptions and accompanying drawing, specifically disclose some specific implementations in embodiment of the present utility model, mean to implement some modes of the principle of embodiment of the present utility model, but should be appreciated that the scope of embodiment of the present utility model is not limited.On the contrary, embodiment of the present utility model comprises spirit and interior all changes, modification and the equivalent of intension scope that falls into additional claims.

The electric energy detection device of the air conditioner that the utility model embodiment proposes and the electric energy detection method of air conditioner are described with reference to the accompanying drawings.

Fig. 2 is the block diagram according to the electric energy detection device of the air conditioner of the utility model embodiment.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 electricity of the input AC to air conditioner (L, N), current sample module 20 samples to obtain the current instantaneous value of described input AC electricity for the electricity of the input AC to air conditioner (L, N).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 the Preset Time section according to the instantaneous voltage of described input AC electricity and the current instantaneous value of described input AC electricity.Power module 40 for input AC electricity (L, N) is converted to the 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 also is 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 an embodiment of the present utility model, as shown in Fig. 2 or Fig. 3 A, power module 40 is the 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 the 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.With 8/16 equipment, compare, 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, have two samplings and hold facility.

Therefore, the controller module 30 of the utility model embodiment 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 an embodiment of the present utility model, 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, the inverting input of the second amplifier U1B with the negative pole end of the secondary coil of current transformer T1, be connected after the output terminal of the second amplifier U1B is connected.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 in-phase input end of the positive terminal of secondary coil of current transformer T1 and the first amplifier U1A.Wherein, current transformer T1 can be the isolated form high precision current transformer.

That is to say, current sample module 20 is for making Current Transformer T1 be converted into little current signal to the large electric current of input, 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, output terminal output the first current detection signal of the first amplifier U1A is the conventional 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, output terminal output the second current detection signal of the 3rd amplifier U1C is little 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, the 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 detected under little electric current running status inaccurate.Therefore the sampling of the current detecting of the utility model embodiment realizes by the multistage operations amplifying circuit, the accuracy that greatly improves 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.The first end of bilateral diode D1 with the other end of the 5th resistance R 5, be connected after the second end is connected, the 3rd end ground connection of bilateral diode D1, 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 an 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 the voltage detecting end Udc_Input(AD that outputs to controller module after electric resistance partial pressure, resistance-capacitance circuit filtering, detect mouth), for giving controller module 30, provide real-time voltage signal.Wherein, rectifier bridge 101 can be half-wave rectifying circuit or bridge rectifier circuit.

In embodiment of the present utility model, 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 with by the current instantaneous value that described the second current detecting end obtains, calculates the energy information of described air conditioner in the Preset Time section when the current instantaneous value obtained by described the second current detecting end is less than preset value.In embodiment more of the present utility model, 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 running status and two current detecting data of air conditioner.For example, when the running status of air conditioner was the refrigeration compressor unlatching, because the running current of current air conditioner is large, controller module 30 calculated 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 the 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 the instantaneous value of 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, controller module 30 is according to following formula calculating voltage effective value:

$V=\sqrt{\frac{1}{T}{\∫}_0^T{\left[v\left(t\right)\right]}^2\mathrm{dt}}---\left(1\right)$

Wherein, V is voltage effective value, and T is the sampling period, v(t) is instantaneous voltage.

In an embodiment of the present utility model, the waveform of voltage sample such as Fig. 4 or shown in Figure 5, by discrete sampling, calculating in described Preset Time section is the voltage effective value in the sampling period signal, formula is:

$V=\sqrt{\frac{1}{n}\underset{k=0}{\overset{n-1}{\mathrm{\Σ}}}{\left[v\left(k\right)\right]}^2}---\left(2\right)$

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 utility model, 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:

$V=\sqrt{({330}^2+{325}^2+......+{330}^2)/100}=225V.$

And controller module 30 calculates current effective value according to following formula:

$I=\sqrt{\frac{1}{T}{\∫}_0^T{\left[i\left(t\right)\right]}^2\mathrm{dt}}---\left(3\right)$

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 the sampling period signal, and formula is:

$I=\sqrt{\frac{1}{n}\underset{k=0}{\overset{n-1}{\mathrm{\Σ}}}{\left[i\left(k\right)\right]}^2}---\left(4\right)$

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 utility model, 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:

$I=\sqrt{({5.5}^2+5.4^2+......+{5.5}^2)/100}=3.89A.$

In addition, controller module 30 also calculates active power according to following formula:

$P=\frac{1}{T}{\∫}_0^{T}v\left(t\right)i\left(t\right)\mathrm{dt}---\left(5\right)$

Similarly, by discrete sampling, calculating in described Preset Time section is the active power in the sampling period signal, and formula is:

$P_j=\frac{1}{n}\underset{k=0}{\overset{n-1}{\mathrm{\Σ}}}v\left(k\right)i\left(k\right)---\left(6\right)$

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) calculated, 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.

Electric energy detection device according to the air conditioner of the utility model embodiment, 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 detected, 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 the process flow diagram according to the electric energy detection method of the air conditioner of the utility model embodiment.As shown in Figure 6, the electric energy detection method of this air conditioner comprises the steps:

S1, the voltage sample module samples to obtain the instantaneous voltage of input AC electricity to the input AC electricity of air conditioner.

S2, the 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 the Preset Time section according to the instantaneous voltage of input AC electricity and the current instantaneous value of input AC electricity.

Particularly, controller module according to the formula (1) to (8) of foregoing description can the 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 utility model, be a kind of brand-new detection method proposed for the deficiency of the existing electric energy detection device of air-conditioning, can reduce the electric-controlled plate area, improves reliability and also reduce system cost.

In an embodiment of the present utility model, the electric energy detection method of described air conditioner 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 the Preset Time section according to described the second current instantaneous value and described instantaneous voltage.

When the second current instantaneous value detected is less than preset value, calculate energy information, the accuracy that has greatly improved electric energy detection according to the second current instantaneous value and instantaneous voltage.

Electric energy detection method according to the air conditioner of the utility model embodiment, 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 detected, realize the Energy Saving Control to air conditioner, thereby realize that low cost realizes electric energy detection, and accuracy of detection is high, reliability is high.

In process flow diagram or in this any process of otherwise describing or method, describe and can be understood to, mean to comprise one or more module be used to the code of the executable instruction of the step that realizes specific logical function or process, fragment or part, and the scope of preferred implementation of the present utility model 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 opposite order, carry out function, this should be understood by embodiment person of ordinary skill in the field of the present utility model.

In process flow diagram, mean or in this logic of otherwise describing and/or step, for example, can be considered to the sequencing list be used to the executable instruction that realizes logic function, may be embodied in any computer-readable medium, for instruction execution system, device or equipment (as the 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 the electronics mode and obtain described program with other suitable methods in case of necessity, then it is stored in computer memory.

Should be appreciated that each several part of the present utility model 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 firmware that suitable instruction execution system is carried out.For example, if realize 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, 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 and realize that all or part of step that above-described embodiment method is carried 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 utility model 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, 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 utility model or example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.

Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that in the situation that do not break away from principle of the present utility model and spirit can be carried out multiple variation, modification, replacement and modification to these embodiment, scope of the present utility model is by claims and be equal to and limit.

Claims (10)

1. the electric energy detection device of an air conditioner, is characterized in that, comprising:

The input AC electricity of air conditioner is sampled to obtain to the voltage sample module of the instantaneous voltage of described input AC electricity;

The input AC electricity of described air conditioner is sampled to obtain to the current sample module of the current instantaneous value of described input AC electricity;

Controller module, described controller module is connected with the current sample module with described voltage sample module, and described controller module calculates the energy information of described air conditioner in the Preset Time section according to the instantaneous voltage of described input AC electricity and the current instantaneous value of described input AC electricity; And

By the galvanic power module of output that described input AC electricity is converted to the predeterminated voltage value, described power module is described voltage sample module, described current sample module and the power supply of described controller module by the 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, an 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, the inverting input of described the second amplifier with the negative pole end of the secondary coil of described current transformer, be connected after the output terminal of described the second amplifier is connected;

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, an 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 in-phase input end of the positive terminal of secondary coil of described current transformer and described the first amplifier.

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, an end of described the 4th resistance is connected with the positive output end of described rectifier bridge;

The 5th resistance, an end of described the 5th resistance is connected with the other end of described the 4th resistance, and the other end of described the 5th resistance is connected respectively with ground with the negative output terminal of described rectifier bridge;

Bilateral diode, the first end of described bilateral diode with the other end of described the 5th resistance, be connected after the second end is connected, the 3rd end ground connection of described bilateral diode, 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 an 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 with by the current instantaneous value that described the second current detecting end obtains, calculates the energy information of described air conditioner in the Preset Time section when the current instantaneous value obtained 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 the 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.

Images