CN213750069U - Terminal voltage measurement network of split type air conditioner interconnection line - Google Patents
Terminal voltage measurement network of split type air conditioner interconnection line Download PDFInfo
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- CN213750069U CN213750069U CN202023048802.XU CN202023048802U CN213750069U CN 213750069 U CN213750069 U CN 213750069U CN 202023048802 U CN202023048802 U CN 202023048802U CN 213750069 U CN213750069 U CN 213750069U
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Abstract
The invention provides a terminal voltage measuring network of a split air conditioner interconnection line, which comprises an input-output line1, an input-output line2, an input-output line3, an input-output line4 and a PE line which are sequentially connected with an inductor L in series2And an inductor L1Input and output line node parallel capacitor C2And a resistor R2Capacitor C1And a resistor R1Capacitor C3And a resistor R3The input and output lines are connected with an extraction radio frequency output end Line RF and used for extracting disturbance voltage radio frequency signals. By the technical scheme, a more stable power supply or signal path can be provided, and interference voltage signals can be extracted; capable of disturbing voltage signals in accordance with interconnection linesThe interference voltage signals are respectively extracted from the source directions, so that the method is more targeted during product research and development or rectification, can be used for simultaneously measuring the terminal disturbance voltage of the interconnection line of the air conditioner, can be directly placed on a terminal disturbance voltage ground reference flat plate, increases the grounding reliability and isolates the external interference signals to the maximum extent.
Description
Technical Field
The invention relates to the technical field of electromagnetic compatibility detection of household split air conditioners and split air conditioners with similar purposes, in particular to a terminal voltage measuring network of a split air conditioner interconnection line.
Background
The linear impedance stabilization network LISN, which can also be called as an artificial power network AMN, is an important device for measuring terminal conduction disturbance, and has three main functions: one is coupling and decoupling. Preventing a radio frequency electromagnetic disturbance signal generated by a measured object from entering a power supply network, and simultaneously attenuating an electromagnetic disturbance signal from the power supply network; secondly, connecting the radio frequency disturbance signal to a radio frequency input port of the EMI measurement receiver through an internal coupling capacitor for quantitative analysis; and thirdly, a stable impedance is provided, so that the test results under different power supply networks are comparable. The LISN is classified into V-type and Δ -type artificial power networks. The V-shaped artificial power supply network is used for measuring asymmetric voltage, and the delta-shaped artificial power supply network is used for measuring symmetric voltage and asymmetric voltage. The terminal conduction disturbance of the direct current electric energy meter respectively measures the radio frequency interference voltage value between the anode and the cathode of the direct current meter working power supply to the specified ground reference, so a V-shaped artificial power supply network is selected.
Two V-type artificial power supply networks are specified in GB/T6113.102-2018, namely 50 omega/50 mu H +5 omega V-type AMN (applicable to 0.15 MHz-30 MHz) and 50 omega/5 mu H +1 omega V-type AMN (applicable to 0.15 MHz-108 MHz). In practical application, the 50 Ω/50 μ H +5 Ω V type artificial power network is mainly used for measuring terminal conduction disturbance of the AC power supply ports of information technology equipment, audio and video equipment, household electrical appliances and the like, and the 50 Ω/5 μ H +1 Ω V type artificial power network is mainly used for measuring terminal conduction disturbance of the DC power supply ports of automobile electronics.
Currently, the national standard GB 4343.1 "electromagnetic compatibility of household appliances, electric tools and similar appliances requires part 1: emission is used as a mandatory standard of domestic electric appliances in China, and is an electromagnetic compatibility requirement which all domestic electric appliances used in China need to meet, and terminal disturbance voltage is one of measurement items. At present, most household appliances are of a single machine structure, terminal disturbance voltage measurement only needs to be carried out aiming at a power supply port of the household appliances, an artificial power supply network is used for realizing the measurement, and the method has the characteristics of high measurement precision and good repeatability. However, in a few household electrical appliances such as a common air conditioner, an artificial power network cannot be used due to existence of interconnection lines or load ports, in this case, a voltage probe is usually used for measuring the terminal disturbance voltage, and when the voltage probe is used for testing the terminal disturbance voltage, the problems of measurement accuracy and repeatability are caused due to the arrangement position of the voltage probe, the grounding mode and the like.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a terminal voltage measuring network of a split type air conditioner interconnection line, which meets the requirements of GB/T6113.102-2018 on an artificial power supply network and can be used for measuring disturbance voltage of a 150kHz-30MHz frequency band terminal of the air conditioner interconnection line.
The invention is realized by the following technical scheme: a terminal voltage measuring network of a split type air conditioner interconnection line comprises an input-output line1, an input-output line2, an input-output line3, an input-output line4 and a PE line, wherein the input-output line1, the input-output line2, the input-output line3 and the input-output line4 are respectively an N zero line, an L live line, an indoor unit communication line and an outdoor unit communication line, and the input-output line1, the input-output line2, the input-output line3 and the input-output line4 are sequentially connected with an inductor L in series2And an inductor L1The input/output line1, the input/output line2, the input/output line3, and the input/output line4 are in the inductor L2Front node parallel capacitor C2And a resistor R2Capacitor C2And a resistor R2Are connected in series between, an inductor L2And an inductor L1Capacitor C connected in parallel at node between1And a resistor R1Capacitor C1And a resistor R1Are connected in series between, an inductor L1The latter node is connected with a capacitor C in parallel3And a resistor R3Capacitor C3And a resistor R3Are connected in series, and the PE lines are connected in parallel with a capacitor C in sequence2And a resistor R2Capacitor C1And a resistor R1Capacitor C3And a resistor R3The input-output Line1, the input-output Line2, the input-output Line3 and the input-output Line4 are respectively connected with the extraction radio frequency output end Line1 RF, the radio frequency output end Line2 RF, the radio frequency output end Line3 RF and the radio frequency output end Line4 RF, and are used for extracting disturbance voltage radio frequency signals.
Preferably, the inductor L1Inductance of 50 muH, inductor L2Inductance of 250 muH, capacitor C1Has a capacitance value of 8 muF, and a capacitor C2Has a capacitance value of 4 muF, and a capacitor C3Has a capacitance value of 0.25 muF, and a resistor R1Has a resistance value of 5 omega and a resistor R1Has a resistance value of 10 omega and a resistor R3The resistance value of (2) is 1000 Ω.
Preferably, the radio frequency output terminal Line1 RF, the radio frequency output terminal Line2 RF, the radio frequency output terminal Line3 RF and the radio frequency output terminal Line4 RF respectively extract the disturbance voltage radio frequency signals within the frequency band of 150kHz to 30MHz from the input/output Line1, the input/output Line2, the input/output Line3 and the input/output Line4, and are respectively connected to the input terminal of the EMI interference receiver.
Preferably, the terminal voltage measuring network is externally provided with a metal housing base.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects: the terminal voltage measurement network of the split air conditioner interconnection line is a 50 omega/50 uH +5 omega measurement network applied to disturbance voltage of a 150kHz-30MHz frequency band terminal of the split air conditioner interconnection line, and compared with a common voltage probe test method, the terminal voltage measurement network can provide a more stable power supply or a signal path and extract an interference voltage signal; interference voltage signals can be respectively extracted according to the source direction (the direction of an indoor unit or the direction of an outdoor unit) of the interference voltage signals of the interconnection lines, and the product development or the product modification is more targeted; providing input and output terminals of 5 paths, and simultaneously measuring terminal disturbance voltage of interconnection wires (a zero wire, a live wire, a ground wire, a communication wire 1 and a communication wire 2) of the air conditioner; the measuring network metal shell base can be directly placed on a terminal disturbance voltage grounding reference plate, so that grounding reliability is improved, and external interference signals are isolated to the maximum extent.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a circuit diagram of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
The terminal voltage measuring network of the split air conditioner interconnection line according to the embodiment of the present invention will be described in detail with reference to fig. 1.
As shown in fig. 1, the present invention provides a terminal voltage measurement network for a split air conditioner interconnection line, which includes an input/output line1, an input/output line2, an input/output line3, an input/output line4 and a PE line, wherein the input/output line1, the input/output line2, the input/output line3 and the input/output line4 are respectively an N zero line, an L live line and an indoor unitThe communication line and the outdoor unit communication line, wherein the input/output line1, the input/output line2, the input/output line3 and the input/output line4 are sequentially connected in series with an inductor L2And an inductor L1The input/output line1, the input/output line2, the input/output line3, and the input/output line4 are in the inductor L2Front node parallel capacitor C2And a resistor R2Capacitor C2And a resistor R2Are connected in series between, an inductor L2And an inductor L1Capacitor C connected in parallel at node between1And a resistor R1Capacitor C1And a resistor R1Are connected in series between, an inductor L1The latter node is connected with a capacitor C in parallel3And a resistor R3Capacitor C3And a resistor R3Are connected in series, and the PE lines are connected in parallel with a capacitor C in sequence2And a resistor R2Capacitor C1And a resistor R1Capacitor C3And a resistor R3Grounded, inductor L1Inductance of 50 muH, inductor L2Inductance of 250 muH, capacitor C1Has a capacitance value of 8 muF, and a capacitor C2Has a capacitance value of 4 muF, and a capacitor C3Has a capacitance value of 0.25 muF, and a resistor R1Has a resistance value of 5 omega and a resistor R1Has a resistance value of 10 omega and a resistor R3The resistance value of (2) is 1000 Ω. The input-output Line1, the input-output Line2, the input-output Line3 and the input-output Line4 are respectively connected with an extraction radio frequency output end Line1 RF, a radio frequency output end Line2 RF, a radio frequency output end Line3 RF and a radio frequency output end Line4 RF, and are used for extracting disturbance voltage radio frequency signals. The radio frequency output end Line1 RF, the radio frequency output end Line2 RF, the radio frequency output end Line3 RF and the radio frequency output end Line4 RF respectively extract disturbance voltage radio frequency signals in a frequency band of 150kHz-30MHz from the input/output Line1, the input/output Line2, the input/output Line3 and the input/output Line4, and are respectively connected to the input end of the EMI interference receiver. The measuring network circuit can provide specified impedance in a measuring range of 150kHz-30MHz, and simultaneously provides enough isolation for parasitic signals at input ends of the input/output line1, the input/output line2, the input/output line3 and the input/output line4, and the output end is connected to an interference receiver to carry out disturbance voltageDuring measurement, disturbance voltage in a frequency range of 150kHz-30MHz generated by the fact that an output end is connected into a measured object can be directly measured. The metal shell base is arranged outside the terminal voltage measuring network and can be directly placed on a terminal disturbance voltage ground reference plate, so that the grounding reliability is improved, and external interference signals are isolated to the maximum extent.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A terminal voltage measuring network of a split type air conditioner interconnection line comprises an input and output line1, an input and output line2, an input and output line3, an input and output line4 and a PE line, and is characterized in that the input and output line1, the input and output line2, the input and output line3 and the input and output line4 are respectively an N zero line, an L live line, an indoor unit communication line and an outdoor unit communication line, and the input and output line1, the input and output line2, the input and output line3 and the input and output line4 are sequentially connected with an inductor L in series2And an inductor L1The input/output line1, the input/output line2, the input/output line3, and the input/output line4 are in the inductor L2Front node parallel capacitor C2And a resistor R2Capacitor C2And a resistor R2Are connected in series between, an inductor L2And an inductor L1Capacitor C connected in parallel at node between1And a resistor R1Capacitor C1And a resistor R1Are connected in series between, an inductor L1The latter node is connected with a capacitor C in parallel3And a resistor R3Capacitor C3And a resistor R3Are connected in series, and the PE lines are connected in parallel with a capacitor C in sequence2And a resistor R2Capacitor C1And a resistor R1Capacitor C3And a resistor R3The input-output Line1, the input-output Line2, the input-output Line3 and the input-output Line4 are respectively connected with the extraction radio frequency output end Line1 RF, the radio frequency output end Line2 RF, the radio frequency output end Line3 RF and the radio frequency output end Line4 RF, and are used for extracting disturbance voltage radio frequency signals.
2. The network of claim 1, wherein the inductor L is a capacitor connected to the terminal voltage measuring network1Inductance of 50 muH, inductor L2Inductance of 250 muH, capacitor C1Has a capacitance value of 8 muF, and a capacitor C2Has a capacitance value of 4 muF, and a capacitor C3Has a capacitance value of 0.25 muF, and a resistor R1Has a resistance value of 5 omega and a resistor R1Has a resistance value of 10 omega and a resistor R3The resistance value of (2) is 1000 Ω.
3. The network of claim 1, wherein the radio frequency output terminal Line1 RF, the radio frequency output terminal Line2 RF, the radio frequency output terminal Line3 RF and the radio frequency output terminal Line4 RF respectively extract the disturbance voltage radio frequency signals in the 150kHz-30MHz frequency band from the input/output Line1, the input/output Line2, the input/output Line3 and the input/output Line4, and are respectively connected to the input terminal of the EMI disturbance receiver.
4. The terminal voltage measuring network of a split type air conditioner interconnection line as claimed in claim 1, wherein a metal housing base is installed outside the terminal voltage measuring network.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112433086A (en) * | 2020-12-17 | 2021-03-02 | 山东省计量科学研究院 | Terminal voltage measurement network of split type air conditioner interconnection line |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112433086A (en) * | 2020-12-17 | 2021-03-02 | 山东省计量科学研究院 | Terminal voltage measurement network of split type air conditioner interconnection line |
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