KR20100012664A - Muli-type air conditioner - Google Patents

Abstract

PURPOSE: A multi-type air conditioner capable of amplifying the attenuation of an electric communication signal is provided to prevent EMI(Electro Magnetic Noise) noise using an inductor. CONSTITUTION: A multi-type air conditioner comprises an outdoor unit(100) and a plurality of indoor units(110,120,130). At least one of the indoor units contains multiple indoor unit communication modules(114,124), indoor unit power supply units(112_2,122_2,132_2), and signal amplification units(112_3,122_3,132_3). The indoor unit communication module transmits an electric communication signal to the outdoor unit through a low power communication line and separates the communication signal from the electric communication signal. The indoor unit power supply unit converts the power signal into drive power for the indoor unit by separating a power signal from the electric communications signal. The signal amplification units amplify the attenuation of the electric communications signal.

Description

Multi-type air conditioner

The present invention relates to a multi-type air conditioner, and more particularly, to a multi-type air conditioner for reinforcing attenuation of power communication signals transmitted and received for indoor and outdoor periods.

In general, an air conditioner is a device that enables air conditioning such as supplying cold or warm air to a building or a room in which the air conditioner is installed by using an air conditioning cycle consisting of a compressor, a condenser, an evaporator, and an expander. Are distinguished.

The separation type and the integrated type are functionally the same, but the separation type installs an indoor heat exchanger (evaporator or condenser) in an indoor unit, and an outdoor heat exchanger (condenser or evaporator) and a compressor in an outdoor unit, and separates them from each other as refrigerant piping. The one-piece unit is an indoor heat exchanger, a compressor, an outdoor heat exchanger, and an expansion device.

The integrated air conditioner includes a window type air conditioner installed directly by hanging a device on a window, and a duct type air conditioner connected to an intake duct and a discharge duct and installed outside the room.

The separate type air conditioners include stand type air conditioners installed upright and wall-mounted air conditioners mounted on a wall.

In addition, the air conditioner may be classified into a cooling air conditioner that is used only for cooling, and a heat pump type air conditioner that may be used for both cooling and heating.

In addition, recently, a multi-type air conditioner in which a plurality of outdoor units and a plurality of indoor units are connected in series has been widely used.

An object of the present invention is to provide a multi-type air conditioner for reinforcing attenuation of power communication signals transmitted and received indoors and outdoors.

The multi-type air conditioner of the present invention includes an outdoor unit and a plurality of indoor units connected to the outdoor unit and a refrigerant pipe, wherein at least one of the plurality of indoor units transmits and receives a power communication signal to the outdoor unit and a low power communication line, and the power communication signal. An indoor unit communication module for separating a communication signal of the indoor unit, an indoor unit power supply unit for separating a power signal of the power communication signal and converting it into an indoor unit driving power, and impedance matching of line impedance of the low power communication line, thereby reinforcing attenuation of the power communication signal. It includes a signal reinforcement unit.

The multi-type air conditioner of the present invention has an effect of reducing the number of circuit elements and the manufacturing cost by using an inductor for reinforcing attenuation of a power communication signal according to an increase in load capacity of each of a plurality of indoor units.

In addition, the multi-type air conditioner of the present invention can be matched with the line impedance of the low power communication line using an inductor to prevent EMI noise.

With reference to the accompanying drawings, a multi-type air conditioner according to the present invention will be described in detail.

1 is a perspective view of a building equipped with a multi-type air conditioner according to a first embodiment of the present invention.

Referring to FIG. 1, the multi-type air conditioner is connected to at least one indoor unit 11, 12, 13, 14, indoor units 11, 12, 13, 14 installed indoors, and includes an outdoor unit 21, 22. do.

Here, the outdoor unit (21, 22) and the indoor unit (11, 12, 13, 14) is connected through the refrigerant pipe (P), so that the refrigerant between the outdoor unit (21, 22) and the indoor unit (11, 12, 13, 14) Depending on the flow, cooling or heating operation is performed.

In this case, the air conditioner may further include a central controller (not shown) connected to the outdoor units 21 and 22 and the indoor units 11, 12, 13, and 14 to monitor and control an operating state.

In addition, a distributor (not shown) may be included between the outdoor units 21 and 22 and the indoor units 11, 12, 13, and 14.

The indoor units 11, 12, 13, 14 and the outdoor units 21, 22 transmit and receive mutual control commands and data according to a predetermined communication method.

Here, at least one indoor unit (11, 12, 13, 14) may be provided in one room, the outdoor unit (21, 22) by the request of at least one of the indoor unit (11, 12, 13, 14) Driven. When a plurality of indoor units are provided in one room, a plurality of indoor units installed in one room may be group controlled or individually controlled through the central controller or outdoor units 21 and 22.

Here, the outdoor units 21 and 22 may have a variable number of air conditioners installed in accordance with the number of air conditioners and the capacity of the compressor according to the number of operation units of the indoor units 11, 12, 13, and 14.

That is, although the outdoor units 21 and 22 are described as two, a plurality of outdoor units may be applied.

2 is a block diagram showing in detail the multi-type air conditioner according to the first embodiment of the present invention.

Referring to FIG. 2, the multi-type air conditioner includes a plurality of indoor units 11, 12, 13, and 14, and outdoor units 21, 22 connected to a plurality of indoor units 11, 12, 13, and 14.

Here, the plurality of indoor units (11, 12, 13, 14) and the outdoor units (21, 22) are connected through the refrigerant pipe 30, the outdoor units (21, 22) are a plurality of indoor units (11, 12, 13, 14) ) And the number of operation of the outdoor units 21 and 22 as the cooling / heating capacity required by the plurality of indoor units 11, 12, 13 and 14 is driven by the request of at least one of the outdoor units 21 and 22. And the number of operations of the compressors installed in the outdoor units 21 and 22 is increased.

Here, the plurality of indoor units 11, 12, 13, and 14 are indoor heat exchangers 51 for exchanging refrigerant and indoor air, and indoor blowers installed near the indoor heat exchangers 51 to circulate indoor air (not shown). And a first refrigerant valve 52 for adjusting the refrigerant to be introduced into the indoor heat exchanger 51 during heating, and a second cooling valve 53 for adjusting the refrigerant to be introduced into the indoor expansion valve 54 during cooling; It includes an indoor expansion valve 54 for expanding the refrigerant flowing to the indoor heat exchanger 51 when cooling.

Each of the outdoor units 21 and 22 receives an accumulator 61 which extracts only a gas refrigerant from the refrigerants supplied from the plurality of indoor units 11, 12, 13, and 14, and receives and compresses the gas refrigerant extracted from the accumulator 61. The compressors 62 and 63, the four-way valves 65 connected to the first and second compressors 62 and 63 to select a flow path of the compressed refrigerant, and the refrigerant and the outdoor air supplied from the four-way valves 65. It includes an outdoor heat exchanger 70 for heat exchange.

Here, the outdoor unit (21, 22) is provided with an inverter compressor (62) and a constant speed compressor (63), the inverter compressor (62) is a compressor that can vary the compression capacity of the refrigerant, the constant speed compressor (63) of the refrigerant Compressor with constant compression capacity.

On the other hand, the oil separator 64 is installed in the pipe connecting the compressors 62 and 63 and the four-way valve 65, and the oil separator 64 is connected to the suction side of the compressors 62 and 63.

In particular, the oil separator 64 separates the oil from the refrigerant discharged from the compressors 62 and 63, and supplies the separated oil to the compressors 62 and 63, thereby providing an appropriate amount of oil in the compressors 62 and 63. Keep it. Then, the suction side pipes of the oil separator 64 and the compressors 62 and 63 are connected through the capillary tube 66, and the oil is moved through the capillary tube 66.

In addition, the refrigerant pipes guiding the refrigerant discharged from the outdoor heat exchanger 70 to the indoor heat exchanger 51 include outdoor electromagnetic expansion valves lev and 74 for expanding the refrigerant during heating, and an indoor heat exchanger 51 for cooling. An overcooling device (not shown) for cooling the refrigerant moved to the liquid crystal device and a liquid injection device (not shown) for lowering the temperatures of the compressors 62 and 63 are provided.

Here, the outdoor electromagnetic expansion valve 74 is fully open during cooling to allow the refrigerant condensed in the outdoor heat exchanger 70 to pass through without expansion, but when heated, it is opened to a predetermined size and condensed in the indoor heat exchanger 51. Is expanded to a liquid in a sprayed state before entering the outdoor heat exchanger (70).

Here, the indoor electromagnetic expansion valve 54 and the outdoor electromagnetic expansion valve 74 is provided with a step motor (not shown) therein, and operates under control from a controller (not shown).

At this time, during the cooling and heating, the step motors of the indoor electromagnetic expansion valve 54 and the outdoor electromagnetic expansion valve 74 operate under the control of the controller.

3 is a functional block diagram schematically showing a multi-type air conditioner according to a first embodiment of the present invention.

Referring to FIG. 3, the multi-type air conditioner includes first, second, and third indoor units 110, 120, and 130 connected to an outdoor unit 100 and a low power communication line PL.

In the present invention, the plurality of indoor units have been described as three first, second, and third indoor units 110, 120, and 130, but the number is not limited thereto.

The outdoor unit 100 receives a commercial power source and transmits a power communication signal including a power signal and a communication signal to the first, second, and third indoor units 110, 120, and 130 through the low power communication line PL.

At this time, the outdoor unit 100 is an outdoor unit communication for transmitting and receiving the power communication signal with the outdoor unit controller 102 and the first, second, third indoor units (110, 120, 130) for controlling the operation of the outdoor unit 100 by the commercial power source Module 104.

Each of the first, second, and third indoor units 110, 120, and 130 is a first, second, and third indoor unit controllers 112, 122, and 132 that control the first, second, and third indoor units 110, 120, and 130, and an outdoor unit. And first, second, and third indoor unit communication modules 114, 124, and 134 for transmitting and receiving the power communication signals with the communication module 104, respectively.

Each of the first, second, and third indoor unit communication modules 114, 124, and 134 transmits and receives the power communication signal through a low power communication line PL, and separates the communication signal from the power communication signal to the first, second, and third indoor units. Transfer to the control unit 112, 122, 132.

Here, the first, second, and third indoor unit controllers 112, 122, and 132 are connected to the first, second, and third indoor unit communication modules 114, 124, and 134, respectively, to receive the communication signals, and to receive the first, second, and third indoor units. The first, second, and third indoor unit microcomputers 112_1. 122_1 and 132_1 controlling the operation of the indoor units 110, 120, and 130 and the power signals are separated from the power communication signals. Signal reinforcement to reinforce the attenuation of the power communication signal by performing impedance matching with the line impedance of the first, second, and third indoor unit power supply units 112_2. 122_2, 132_2 and the low power communication line PL converting to the driving power of the 120 and 130. Section 112_3, 122_3, and 132_3.

Here, each of the first, second, and third signal reinforcement units 112_3, 122_3, and 132_3 has an increased load capacity of the first, second, and third indoor units 110, 120, and 130, and thus the line impedance of the low power communication line PL is increased. As a result, the power communication signal transmitted from the outdoor unit communication module 104 is not affected by attenuation or EMI noise.

That is, each of the first, second, and third signal reinforcement units 112_3, 122_3, and 132_3 is an inductor that cancels the increase of the line impedance to reinforce the attenuation of the power communication signal or the EMI noise.

4 is a simplified circuit diagram of the indoor unit controller and indoor unit communication module shown in FIG. 3.

Referring to FIG. 4, the multi-type air conditioner illustrates a first indoor unit 110 connected to an outdoor unit 100 by a low power communication line PL, and outputs a power signal among power communication signals transmitted to the low power communication line PL. A first power source V1 and a second power source V2 for outputting a communication signal among the power communication signals.

That is, FIG. 4 is a simplified circuit diagram illustrating the first indoor unit communication module 114, the first indoor unit power supply unit 112_2, and the first signal reinforcement unit 112_3.

Here, the first resistor R1 represents the line impedance of the low power communication line PL as a resistor.

The first indoor unit communication module 114 outputs a second power source V2 for a communication signal among the power communication signals. Here, the first indoor unit communication module 114 includes a first capacitor C1 connected in series with the first resistor R1, a first inductor L1 connected in series with the first capacitor C1, and a first resistor R1. ) And a second resistor R2 connected in parallel with the first capacitor C1.

Here, the second power source V2 is output at both ends of the first inductor L1.

The first indoor unit power supply unit 112_2 includes a second capacitor C2, a second inductor L2 connected to one side of the second capacitor C2, and a third inductor L4 connected to the other side of the second capacitor C2. And a third resistor R3 connected to the second and third inductors L2 and L3, and a third capacitor C3 connected in parallel with the third resistor R3.

Here, the third capacitor C3 outputs the first power source V1 at both ends.

The first signal reinforcement part 112_3 is an inductor LT connected in parallel with the first resistor R1 and connected to one side of the second capacitor C2.

Here, the inductor LT preferably has a capacity of 1mH to 100mH. This is to prevent the first resistor R1 from rising as the capacity of the third capacitor C3 increases.

In other words, the inductor LT causes the transmission gain ratio of the power communication signal to be 600% higher than that of the prior art.

Table 1 shows the gain ratio according to the inductor capacity compared to the conventional invention by the experiment.

First, briefly explaining [Table 1], the experiment is conducted with 30 indoor units, where the equivalent resistance is calculated by calculating the impedance of the indoor unit communication module and the indoor unit power supply unit using a Thevenan equivalent circuit to calculate the input impedance of each indoor unit. It is shown.

Therefore, if the inductor LT has a capacity of at least 1 mH or more, the gain ratio of the inductor LT is increased by 6 times or more.

In addition, the inductor LT may prevent the EMI communication from being included in the power communication signal.

The multi-type air conditioner of the present invention has an advantage of reducing component elements and lowering manufacturing costs by performing impedance matching only with an inductor without forming a filter for preventing attenuation of power communication signals and EMI noise.

Although a preferred embodiment of the present invention has been described in detail above, those skilled in the art to which the present invention pertains can make various changes without departing from the spirit and scope of the invention as defined in the appended claims. It will be appreciated that modifications or variations may be made. Accordingly, modifications to future embodiments of the present invention will not depart from the technology of the present invention.

1 is a perspective view of a building equipped with a multi-type air conditioner according to a first embodiment of the present invention.

2 is a block diagram showing in detail the multi-type air conditioner according to the first embodiment of the present invention.

3 is a functional block diagram schematically showing a multi-type air conditioner according to a first embodiment of the present invention.

4 is a simplified circuit diagram of the indoor unit controller and indoor unit communication module shown in FIG. 3.

Claims (5)

An outdoor unit and a plurality of indoor units connected to the outdoor unit and a refrigerant pipe, At least one of the plurality of indoor units, An indoor unit communication module configured to transmit and receive a power communication signal through the outdoor unit and a low power communication line, and to separate a communication signal from the power communication signal; An indoor unit power supply unit which separates a power signal from the power communication signal and converts the power signal into an indoor unit driving power source; And And a signal reinforcement unit configured to perform impedance matching with the line impedance of the low power communication line to reinforce the attenuation of the power communication signal. The method of claim 1, wherein the signal reinforcement unit, And the indoor unit communication module connected in parallel, and connected in series with the indoor unit power supply unit. The method of claim 1, wherein the signal reinforcement unit, Multi-type air conditioner, characterized in that for canceling the increase in the line impedance according to the load capacity of each of the plurality of indoor units. The method of claim 1, wherein the signal reinforcement unit, Multi-type air conditioner, characterized in that the inductor. The method of claim 4, wherein the inductor, Multi-type air conditioner, characterized in that 1mH to 100mH.

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