KR101973468B1 - Power terminal wire and air conditioner including the same - Google Patents

Abstract

The present invention relates to an air conditioner, and more particularly, to a power terminal wire having an inductor core capable of eliminating power source noise and an air conditioner including the same. According to the present invention, there is provided a power terminal wire for an air conditioner for noise removal, comprising: a power terminal connected to a commercial power source; An outdoor unit having one end connected to the power source through the power line and the other end connected to the outdoor unit; An indoor base end connected to the power line in parallel and connected to at least one indoor unit; And an inductor core connected between the power source stage and the outdoor unit stage for removing the synthetic noise generated in the indoor unit and the outdoor unit.

Description

Technical Field [0001] The present invention relates to a power terminal wire and an air conditioner including the same,

The present invention relates to an air conditioner, and more particularly, to a power terminal wire having an inductor core capable of eliminating power source noise and an air conditioner including the same.

Generally, the air conditioner may include an outdoor unit and at least one indoor unit. Such an indoor unit may include a wall-mounted indoor unit and a stand-type indoor unit.

Such an air conditioner uses a motor as a driving source. These motors are supplied with AC power from a power conversion device.

Thus, the air conditioner includes electronic components for driving the motor, and noise may be generated in each of the outdoor unit and the indoor unit.

How much noise is emitted to the outside through the power supply terminal of the air conditioner can be measured through electro-magnetic interference measurement, which can be a criterion for judging the reliability of the electronic product.

This noise can be partially removed through the noise filter installed in each of the outdoor unit and the indoor unit, but the noise is additionally removed by using the inductor core.

Such an inductor core has been installed in a place where a circuit board (PCB) is applied to each of an outdoor unit and an indoor unit. That is, the noise is prevented by arranging the cores in the respective noise sources in parallel from the respective noise sources.

However, since the noise of each of the different bands is removed, it is inconvenient to separately design and apply a core suitable for each noise in order to remove noise of different bands.

Accordingly, there is a need for a method that can effectively remove the noise generated in each part of the air conditioner.

In addition, there is a need for a substantial power terminal wire structure capable of effectively eliminating noise generated in each part of the air conditioner including at least one indoor unit and outdoor unit.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a power terminal wire and an air conditioner including the same which can effectively remove noise by using the combined impedance characteristics of an outdoor unit and an indoor unit.

According to a first aspect of the present invention, there is provided a power terminal wire for an air conditioner for noise removal, comprising: a power terminal connected to a commercial power source; An outdoor unit having one end connected to the power source through the power line and the other end connected to the outdoor unit; An indoor base end connected to the power line in parallel and connected to at least one indoor unit; And an inductor core connected between the power source stage and the outdoor unit stage for removing the synthetic noise generated in the indoor unit and the outdoor unit.

Here, the terminal block may further include a terminal block connected between the power supply terminal and the inductor core.

The indoor unit may include a first indoor unit and a second indoor unit.

At this time, the first indoor base end and the second indoor base end may be connected in parallel with the inductor core.

The air conditioner may further include a communication connector commonly connected to the first indoor base and the second indoor base.

The first indoor proximal end may be connected to a stand-type indoor unit, and a second inductor core having a resonant frequency different from that of the inductor core may be further provided between the first indoor unit and the inductor core.

Here, the inductor core may have a resonance frequency corresponding to a frequency of a synthesized noise generated at the indoor base stage and the outdoor stage.

Here, the fuse may further include a fuse connected between the indoor unit and the power line.

According to a second aspect of the present invention, there is provided an air conditioner comprising: at least one indoor unit installed in a room; An outdoor unit connected to the indoor unit; And an outdoor unit connected to the outdoor unit through a power line and a power line connected to the power line, the outdoor unit connected in parallel with the power line, and connected to the at least one indoor unit, And an inductor core connected between the power terminal and the outdoor terminal to remove a composite noise generated in the indoor unit and the outdoor unit.

Here, the inductor core may have a resonance frequency corresponding to a frequency of a synthesized noise generated at the indoor base stage and the outdoor stage.

The present invention has the following effects.

First, an inductor core having an impedance of a wide band is located at an end of a power path, thereby eliminating a wide band noise.

At this time, it is possible to remove the composite noise generated at the indoor and outdoor units through the impedance analysis.

That is, the noise can be removed through the inductor core at the power supply end, which is the end of the power path of the air conditioner, so that the noise exiting to the outside can be minimized.

Moreover, by connecting the air conditioner with the power terminal wire having the noise removing function, the noise of the air conditioner can be effectively removed.

In addition, the number of inductor cores used by the power terminal wire structure can be minimized.

1 is a schematic view showing a power terminal connection method of an air conditioner according to an embodiment of the present invention.
2 is a view schematically showing a power terminal fastening method of the air conditioner of FIG.
3 is a circuit diagram of a power terminal wire of an air conditioner according to an embodiment of the present invention.
4 is an external view of a power terminal wire of an air conditioner according to an embodiment of the present invention.
5 is a graph of impedance characteristics measured at the power supply end side where the inductor core is installed.
6 is a graph showing the impedance magnitude and characteristics.
7 is an equivalent circuit of the inductor.
8 is a graph showing characteristics of an actual inductor.
9 is a waveform diagram showing noise when a power terminal wire according to the prior art is used for an air conditioner.
10 is a waveform diagram showing noise when a power terminal wire according to an embodiment of the present invention is used in an air conditioner.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. Rather, the intention is not to limit the invention to the particular forms disclosed, but rather, the invention includes all modifications, equivalents and substitutions that are consistent with the spirit of the invention as defined by the claims.

It will be appreciated that when an element such as a layer, region or substrate is referred to as being present on another element "on," it may be directly on the other element or there may be an intermediate element in between .

Although the terms first, second, etc. may be used to describe various elements, components, regions, layers and / or regions, such elements, components, regions, layers and / And should not be limited by these terms.

FIG. 1 is a schematic view showing a power terminal clamping method of an air conditioner according to an embodiment of the present invention, and FIG. 2 is a view schematically showing a power terminal clamping method of the air conditioner of FIG.

Referring to FIG. 1, the air conditioner may include an outdoor unit 10 and at least one indoor unit 20. The indoor unit 20 may include a wall-mounted indoor unit 21 and a stand-type indoor unit 22. [ FIG. 1 shows a state in which the wall-mounted indoor unit 21 and the stand-type indoor unit 22 are included one by one, but the wall-mounted indoor unit 21 and the stand-type indoor unit 22 may each include a plurality of them.

In this outdoor unit 10, the power line 70 is connected to the terminal block 40 on one side.

The terminal block 40 may be provided with an inductor core 60 on the side of the power supply stage 41 in order to remove the synthetic noise generated in the indoor unit 20 and the outdoor unit 10. [

1, a power line 70 is shown as a line connecting between the indoor unit 20 and the terminal block 40, but a line connecting the terminal block 40 and the outdoor unit 10 and a terminal block 40, And the power line (70).

At this time, the outdoor unit stage 71 for connecting the outdoor unit 10 to the end of the power line 70 between the outdoor unit 10 and the terminal block 40 may be provided.

The outdoor unit stage 71 is for connecting the power supply line 70 and the outdoor unit 10 and may mean a terminal that can be coupled to the outdoor unit 10. [

Further, the power lines 70 can be connected to the terminal blocks 40 on the other side of each of the indoor units 21, 22.

An indoor base end 72 for connecting the indoor unit 20 may be provided between the indoor unit 20 and the end of the power source line 70.

The indoor base end 72 is for connecting the power source line 70 and the indoor unit 20 and may mean a terminal that can be coupled to the indoor unit 20. [

The indoor base end 72 may include a first indoor base end 73 connected to the wall-mounted indoor unit 21 and a second indoor base end 74 connected to the stand-type indoor unit 22. [

The indoor base end 72 may be connected to one terminal block 40. The terminal block 40 on one side to which the outdoor unit stage 71 is connected can be connected to the terminal block 40 on the other side to which the indoor base unit 72 is connected.

In some cases, the terminal block 40 on the other side to which the indoor base end 72 is connected may be omitted. That is, the terminal block 40 to which the indoor base end 72 is connected may be omitted, and the power source line 70 connected to the indoor base end 72 may be directly connected to the inductor core 60.

One end of the terminal block 40 on one side to which the outdoor unit stage 71 is connected can be connected to a power source terminal 41 (connected to a commercial power source).

Meanwhile, a separate noise filter may be provided on the outdoor unit stage 71 side, and a separate noise filter may be provided on the indoor unit stage 72 side.

At this time, the inductor core 60 may be formed on the side of the power source stage 41 in order to remove the composite noise generated in the indoor base stage 72 and the outdoor stage 71. That is, the inductor core 60 may be installed at the outermost side connected to the power supply stage 41 to remove the composite noise generated at the indoor base stage 72 and the outdoor stage 71.

That is, the inductor core 60 may have a resonant frequency corresponding to the frequency of the composite noise generated at the indoor base end 72 and the outdoor air end 71.

Referring to FIGS. 1 and 2, on the terminal block 40, the indoor base end 72 and the outdoor end 71 may be connected to the inductor core 60.

The inductor core 60 may be installed between the power terminal 41 and the terminal block 40 connected to the indoor base end 72 and the outdoor air end 71.

Referring to FIG. 1, both the indoor unit 10 and the outdoor unit 20 are connected to the terminal block 40, the terminal block 40 is connected to the power terminal 41, and the inductor core 40 60 are connected.

The inductor core 60 can be used as a filter for removing noise by using characteristics of the inductor. That is, it can be used as an electro-magnetic interference (EMI) filter by using the property of trying to resist the change of the current of the inductor.

2, an inductor core 61 is additionally provided between the stand-type indoor unit 22 and the terminal block 40 to remove noise generated from the indoor unit 22 side.

That is, the second inductor core 61 may further include a second inductor core 61 having a resonance frequency different from that of the inductor core 60, between the stand-type indoor unit 22 and the inductor core 60.

The second inductor core 61 may be used as an auxiliary to the inductor core 60 provided on the power supply stage 41 side. That is, an inductor having a relatively smaller size than the inductor core 60 may be used for the second inductor core 61.

FIG. 3 is a circuit diagram of a power terminal wire of an air conditioner according to an embodiment of the present invention, and FIG. 4 is an external view of a power terminal wire of an air conditioner according to an embodiment of the present invention.

That is, FIG. 3 shows a concrete circuit diagram of a power terminal wire for power supply of the air conditioner according to an embodiment of the present invention. Fig. 4 shows the appearance of the actual power terminal wire by this circuit diagram.

The power terminal wire of such an air conditioner may include a noise canceling function.

That is, the power terminal wire of such an air conditioner can provide a power terminal wire capable of supplying power to the air conditioner according to the power terminal fastening method of the air conditioner described with reference to FIG. 1 and FIG.

The power terminal wire may be provided with an inductor core 60 on the power supply end 41 side in order to remove the composite noise generated from the indoor base end 72 and the outdoor air end 71.

In other words, the inductor core 60 is integrally provided on the power terminal wire, and the air conditioner connected by the power terminal wire connects the indoor unit stage 72 and the outdoor unit stage 71 to noise elimination Function.

3 and 4, a power terminal wire according to an embodiment of the present invention is connected to a power terminal 41 via a power terminal 41 and a power line 70 connected to a commercial power source, An outdoor unit stage 71 whose other end is connected to the outdoor unit 10 (see Figs. 1 and 2), and an outdoor unit unit 71 connected in parallel to the power supply line 70 and connected to at least one indoor unit 20 (see Figs. 1 and 2) An indoor base end 72 and an inductor core 60 connected between the power source stage 41 and the outdoor unit stage 71 for removing the synthetic noise generated in the indoor unit and the outdoor unit.

As mentioned above, the air conditioner may include an outdoor unit 10 and at least one indoor unit 20. [ The indoor unit 20 may include a wall-mounted indoor unit 21 and a stand-type indoor unit 22. [ 1, a wall-mounted indoor unit 21 and a stand-type indoor unit 22 are included, respectively. However, the wall-mounted indoor unit 21 and the stand-type indoor unit 22 each include a plurality of .

Here, a terminal block 40 connected between the power supply stage 41 and the inductor core 60 may be provided.

The power line 70 includes a line connecting between the indoor unit 20 and the terminal block 40, a line connecting the terminal block 40 and the outdoor unit 10, a terminal block 40, . ≪ / RTI >

Here, the indoor base end 72 may include a first indoor base end 73 and a second indoor base end 74.

As described above, the outdoor unit stage 71 is for connecting the power supply line and the outdoor unit 10, and may mean a terminal that can be coupled to the outdoor unit 10. [

The indoor base end 72 is for connecting the power source line 70 and the indoor unit 20 and may mean a terminal that can be coupled to the indoor unit 20. [

The indoor base end 72 may include a first indoor base end 73 connected to the wall-mounted indoor unit 21 and a second indoor base end 74 connected to the stand-type indoor unit 22. [

The indoor base end 72 may be connected to the power line 70.

At this time, the first indoor base end 73 and the second indoor base end 74 may be connected in parallel with the inductor core 60.

In addition, a communication connector 76 connected to the first indoor base end 73 and the second indoor base end 74 may be provided.

And may further include a fuse 75 connected between the indoor base 72 and the power line 70. The fuse 75 is positioned between the inductor core 60 and the indoor base end 72 to protect the indoor unit when an overvoltage overcurrent is applied.

Meanwhile, an inductor core 61 is additionally provided between the indoor base end 72 and the inductor core 60 to remove noise generated from the indoor unit 22 side.

That is, the second inductor core 61 may further include a second inductor core 61 having a resonance frequency different from that of the inductor core 60, between the stand-type indoor unit 22 and the inductor core 60.

The second inductor core 61 may be installed at the position of the fuse 75 shown in FIG. That is, a second inductor core 61 may be provided instead of the fuse 75, or a second inductor core 61 may be provided together with the fuse 75.

Such a second inductor core 61 can be used as an auxiliary to the inductor core 60 provided on the power supply stage 41 side. That is, an inductor having a relatively smaller size than the inductor core 60 may be used for the second inductor core 61.

The power terminal wire described above can be used in connection with the air conditioner.

That is, the power source stage 41 is connected to the commercial power source, the outdoor unit stage 71 is connected to the outdoor unit of the air conditioner, and the indoor unit stage 72 is connected to the indoor unit of the air conditioner.

At this time, the first indoor base end 73 of the indoor base end 72 may be connected to the wall-mounted indoor unit, and the second indoor base end 74 may be connected to the stand-type indoor unit. However, the present invention is not limited thereto. That is, when there are two or more indoor units, the indoor base end 72 may further include a third indoor base end and further terminals.

Further, the communication connector 76 may be connected to a communication unit (not shown) of the outdoor unit.

The power terminal wire may be connected to the air conditioner and may be connected to each other so that power can be supplied to the indoor unit and the outdoor unit.

The power terminal wire and the air conditioner including the power terminal wire are capable of eliminating a wide band noise because the inductor core 60 having a wide band impedance is located at the end of the power path.

At this time, it is possible to remove the composite noise generated at the indoor base end 72 and the outdoor end 71 through the impedance analysis.

In other words, the noise can be removed through the inductor core 60 at the power supply terminal 41, which is the end of the power path of the air conditioner, and the noise exiting to the outside can be minimized.

Further, the noise can be more effectively removed by the interaction between the inductor core 60 on the power supply stage 41 side and the additional small inductor core 61. [

Furthermore, the number of inductor cores used by the power terminal wire structure can be minimized.

5 is a graph of impedance characteristics measured at the power supply end side where the inductor core is installed.

Referring to Fig. 5, the solid line shows the impedance characteristic, and the dotted line shows the reactance characteristic. These impedance characteristics show the characteristics of the entire indoor base end 72 and the outdoor airway end 71.

That is, the impedance characteristics of the indoor base stage 72 and the outdoor stage 71 are analyzed, and by using the inductor core 60 corresponding to these characteristics, the composite noise generated from the indoor base stage 72 and the outdoor stage 71 (C) can be removed.

5 shows the composite noise C of the indoor base end 72 and the outdoor air end 71. In this way, the impedance band by the indoor base end 72 and the impedance band by the outdoor air end 71 are combined The noise due to the impedance of the synthesized band can be removed by the inductor core 60 provided on the power supply stage 41 side.

In other words, the noise can be removed through the inductor core 60 at the power supply terminal 41, which is the end of the power path of the air conditioner, and the noise exiting to the outside can be minimized.

In this manner, the inductor core 60 having a wide band impedance is located at the end of the power path, and noise of a wide band can be removed.

At this time, it is possible to remove the composite noise generated at the indoor base end 72 and the outdoor air end 71 through the impedance analysis. However, the second inductor core 61 ) To remove more noise.

Alternatively, the noise can be removed more effectively by the interaction between the inductor core 60 on the power supply stage 41 side and the second inductor core 61. For example, the band width of the synthesized noise can be further narrowed through the second inductor core 61, and the composite noise of the narrow band can be effectively removed using the inductor core 60.

FIG. 6 is a graph showing the impedance magnitude and characteristics, and FIG. 7 is an equivalent circuit of the inductor. 8 is a graph showing characteristics of an actual inductor.

Hereinafter, a process of removing noise using an inductor will be described with reference to FIGS.

Inductors have inductance, and inductance refers to the ability to induce electromotive force in a circuit by a change in applied current.

These inductors are parts that are wound around the core and are called coils. The strength of the inductance depends on the material and shape of the inner core.

If the current does not change with time, no voltage is applied to the inductor. That is, the inductor operates as a short circuit for direct current.

However, when a constant current flows, the voltage is '0', but a certain amount of energy is accumulated. If the current flows discontinuously in such an inductor, the inductor current can not be discontinuously changed since the voltage must be infinite.

This characteristic can be used as a filter (noise reduction filter) (EMI filter) using the property of stabilizing the change of the electric current.

The core of the EMI filter is made of an oxide of manganese-zinc (Mn-Zn) or nickel-zinc (Ni-Zn) as a powder and then baked and hardened. Dual manganese-zinc ferrite is mainly used for removing noise from power circuits. That is, the inductor core in the present invention can use such manganese-zinc ferrite.

6 shows the magnitude and characteristics of the actual impedance. Here, f1 represents the starting point of impedance increase of the actual inductor. Since the actual inductor has parasitic resistance, the impedance does not increase at a certain frequency range (frequency range below f1). Where f2 represents the resonant frequency.

Referring to FIG. 7, such an inductor has an inductor L connected in series and an equivalent circuit in which a resistor _Rpar and a capacitor C are connected in parallel.

8 shows an actual inductor in an inductance-impedance graph.

In the graph, the two lines cross each other, the dotted line represents the inductance, and the solid line below represents the impedance. As can be seen from the graph, the impedance does not increase below a certain level. The absence of an increase in impedance means that it behaves the same way as a wire.

In the graph, f2 represents the point where the characteristic of the inductor changes from the inductor to the capacitor. When the frequency is exceeded, the inductance decreases and the characteristic of the conductance is shown.

The point where the impedance is changed according to the frequency and the impedance shows the highest point is called the resonance point (resonance frequency). The specific noise can be removed by using the characteristic of such a resonance point.

As described above, according to the present invention, by analyzing each noise source connected to the terminal block 40 in one place and analyzing the noise frequency at the finally synthesized end line, the impedance source analysis Can be applied.

That is, according to the embodiment of the present invention, the inductor core 60 positioned at the final stage of the power supply stage 41 can have a resonance frequency corresponding to the frequency of the synthesized noise generated at the indoor base stage and the outdoor stage, It is possible to remove the noise by using the corresponding optimum core.

Therefore, the noise can be effectively removed by using the minimum number of inductor cores.

Fig. 9 is a waveform diagram showing noise when a power terminal wire according to the prior art is used for an air conditioner, Fig. 10 is a waveform diagram showing noise when a power terminal wire according to an embodiment of the present invention is used for an air conditioner to be.

In the case of Fig. 9, noise due to the example using an individual inductor core in each part of the air conditioner is shown.

9, an example in which the inductor core is used on the side of the power supply stage 41 capable of eliminating the composite noise generated in the indoor base stage 72 and the outdoor stage 71, as in the embodiment of the present invention, , But a separate inductor core corresponding to the portion corresponding to the indoor unit side, the outdoor unit side, and the power supply end side is used.

In Figs. 9 and 10, L1 and L2 denote CE (conductive emission) noise limiting lines according to international standards, respectively. Here, CE noise refers to electromagnetic interference that is transmitted through an electrical connection (power line, signal line) and affects other devices.

9 and 10, the unit on the left represents the CE noise limit line for each band. The dotted line spectrum located on the upper side shows the peak of the CE noise, and the solid line spectrum located on the lower side shows the average value of the CE noise.

The point A in FIG. 9 and the point B in FIG. 10 each indicate a portion where a point of a noise peak is located.

According to FIG. 9 showing the conventional case, the quasipeak indicating the midpoint between the peak of the noise and the mean value is measured at 56.23 dBμV. According to FIG. 10 showing the case of the present invention, the quasi-peak value is measured at 52.70 dBμV do.

In addition, the average value of the noise is measured as 47.20 dBμV in the case of FIG. 9, but is measured as 42.67 dBμV in the case of FIG.

9 and 10, it can be seen that the CE noise in the 6 MHz to 7 MHz band is improved by about 4 dB.

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of specific examples for the purpose of understanding and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

10: outdoor unit 20: indoor unit
21: Wall-mounted type indoor unit 22: Stand type indoor unit
40: Terminal block 60: Inductor core
61: second inductor core 70: power line
71: outdoor unit stage 72: indoor air unit
73: first indoor base unit 74: second indoor base unit
75: Fuse 76: Communication connector

Claims (10)

A power terminal wire for an air conditioner for noise removal,
A power supply terminal connected to a commercial power supply;
An outdoor unit having one end connected to the power source through the power line and the other end connected to the outdoor unit;
An indoor base end connected to the power line in parallel and connected to at least one indoor unit;
An inductor core connected between the power source stage and the outdoor unit for removing synthetic noise generated in the indoor unit and the outdoor unit; And
And a terminal block connected between the power supply terminal and the inductor core. delete The power terminal wire of an air conditioner according to claim 1, wherein the indoor base end includes a first indoor base end and a second indoor base end. The power terminal wire of claim 3, wherein the first indoor base end and the second indoor base end are connected in parallel with the inductor core. The power terminal wire of an air conditioner according to claim 3, further comprising a communication connector commonly connected to the first indoor base and the second indoor base. The indoor unit of claim 3, further comprising a second inductor core having a resonance frequency different from that of the inductor core, between the first indoor unit stage and the inductor core, wherein the first indoor base unit is connected to the stand- Power terminal wire of air conditioner. The power terminal wire according to claim 1, wherein the inductor core has a resonance frequency corresponding to a frequency of a composite noise generated at the indoor base and the outdoor air. The power terminal wire of claim 1, further comprising a fuse connected between the indoor unit and the power line. In the air conditioner,
At least one indoor unit installed indoors;
An outdoor unit connected to the indoor unit; And
An outdoor air conditioner having a power source connected to a commercial power source, an outdoor unit having one end connected to the power source through a power source line and the other end connected to the outdoor unit, an indoor starter connected in parallel to the power source line and connected to the at least one indoor unit, And an inductor core connected between the power source stage and the outdoor unit stage to remove synthetic noise generated in the indoor unit and the outdoor unit,
Wherein the inductor core has a resonance frequency corresponding to a frequency of a synthesized noise generated at the indoor base stage and the outdoor stage.
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