JP2012172913A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce power loss generated during power transfer between an indoor unit and an outdoor unit in a separation type air conditioner.SOLUTION: The separation type air conditioner comprises the indoor unit and the outdoor unit provided with a compressor and receives AC power from a commercial power source by means of the indoor unit, AC power from the commercial power source is converted into DC power by means of an AC/DC power conversion unit arranged in the indoor unit, the DC power converted by the AC/DC power conversion unit is supplied to an indoor unit control circuit, and is transmitted to the outdoor unit via a connection line which connects the indoor unit to the outdoor unit, and operates an outdoor unit control circuit and an inverter for driving a compressor.

Description

  The present invention relates to an indoor / outdoor separate type air conditioner that receives AC power from a commercial power source in an indoor unit.

  FIG. 10 shows a block diagram of a conventional air conditioner.

  As air conditioners for general homes, a separate type air conditioner composed of an indoor unit 100 and an outdoor unit 101 has become widespread, and these supply AC power from a commercial power source through an outlet 103 embedded in a wall of the room. Many machines 100 receive power.

  In the indoor unit 100, an indoor fan motor 9 and a wind direction louver control motor 10 that controls the wind direction are controlled by the indoor unit control circuit 7.

  On the other hand, in the outdoor unit 101, the outdoor fan motor 35 that blows air to the heat exchanger and the four-way valve 36 that switches the refrigerant circulation direction in the refrigeration cycle by cooling and heating are controlled by the outdoor unit control circuit 31, in recent years. Then, what drives by the compressor drive inverter 30 which can carry out variable speed control of the compressor 34 which compresses the refrigerant | coolant in a refrigerating cycle is the mainstream.

  AC power from a commercial power source is temporarily received by the indoor unit 100 and converted from AC power to DC power by the rectifying / smoothing circuit 21 provided in the indoor unit 100 and sent to the indoor unit control circuit 7 that operates the indoor unit. In addition, the indoor unit 100 and the outdoor unit 101 are also conveyed to the outdoor unit via an indoor / outdoor connection wiring 20 that electrically connects the indoor unit 100 and the outdoor unit 101.

  Further, the indoor / outdoor connection wiring 20 is used for transmitting and receiving information data between the indoor unit 100 and the outdoor unit 101 in addition to the power transfer from the indoor unit 100 to the outdoor unit 101.

  The AC power from the commercial power source conveyed via the indoor / outdoor connection wiring 20 is obtained from the passive converter circuit 22 provided in the outdoor unit 101, the power factor improvement of the input AC power and the output DC power. The PFC converter circuit having the function of boosting the voltage is converted into DC power and distributed to the compressor driving inverter 30 and the outdoor unit control circuit 31 that drive the compressor 34.

  Moreover, in the air conditioners disclosed in Patent Document 1, Patent Document 2, and the like, after the AC power of the commercial power received by the indoor unit is conveyed to the outdoor unit by the connection line, the AC / DC power conversion circuit in the outdoor unit is used. A configuration is described in which the electric power converted into the low-voltage direct current is conveyed again to the indoor unit.

JP 11-287503 A JP-A-11-304217

However, in the separate air conditioner configured as described above, in any case, AC power is transferred from the commercial power source to the outdoor unit from the indoor unit via the connection line. The voltage value is approximately 100 V or 200 V, and the current value is approximately 20 A at the maximum although it depends on the capability of the air conditioner.

  In the connection line that electrically connects the indoor unit and the outdoor unit, there is an electrical resistance component, and the power loss increases as more current flows under the influence of the electrical resistance component. In an air conditioner in which the power for driving the compressor accounts for most of the power consumption of the product, the power loss in this connecting line is a problem that cannot be ignored.

  If the distance between the indoor unit installed indoors and the outdoor unit installed outdoors increases depending on the house and the surrounding environment, the power loss in this connection line will adversely affect the energy consumption in the home. become.

  On the other hand, air conditioners that integrate the functions and parts of indoor units and outdoor units are not separate types, and there is no degree of freedom for installation in houses, so demand in the market cannot be expected. The wiring connection is an unavoidable element for establishing a product.

  The present invention solves the above-described problems, and is an air that can further reduce the cost while minimizing the power loss caused by power transfer between the indoor unit and the outdoor unit. The purpose is to provide a harmony machine.

  In order to solve the above conventional problems, an air conditioner of the present invention is composed of an outdoor unit including an indoor unit and a compressor, and is a separate type that receives AC power from a commercial power source in the indoor unit. AC power from a commercial power source is converted into DC power by an AC DC power converter disposed in the indoor unit, and the DC power converted by the AC DC power converter is supplied to the indoor unit control circuit. In addition, power is transmitted to the outdoor unit via a connection line connecting the indoor unit and the outdoor unit, and the outdoor unit control circuit and the compressor driving inverter are operated.

  Thereby, it is possible to realize an air conditioner with high energy saving that suppresses the power loss generated by power transfer between the indoor unit and the outdoor unit to the maximum.

  According to the air conditioner of the present invention, it is possible to suppress the power loss generated by the power transfer between the indoor unit and the outdoor unit to the maximum, and the AC / DC power conversion unit only for the indoor unit. By providing, it is possible to reduce the number of parts, reduce the size of the electronic board, and reduce the cost in the entire product.

Explanatory drawing which shows the structure by the side of the indoor unit of the air conditioner in Embodiment 1. Explanatory drawing which shows the structure by the side of the outdoor unit of the air conditioner in Embodiment 1. The figure which shows a mode that the air conditioner in Embodiment 1 was connected to the power distribution system. The figure which shows the structure of the air conditioner in Embodiment 2. FIG. The figure which shows the power loss characteristic of the wiring in Embodiment 2 The figure which shows the structure of the air conditioner in Embodiment 3. The figure which shows the structure of the air conditioner in Embodiment 4. The figure which shows the structure of the air conditioner in Embodiment 5. The figure which shows a part of control flow of the indoor unit side of the air conditioner in Embodiment 6, and the outdoor unit side The figure which shows the structure of the air conditioner by a prior art

  A first aspect of the present invention is a separate type air conditioner that includes an indoor unit and an outdoor unit that includes a compressor, and receives AC power from a commercial power source in the indoor unit. The DC power converted by the AC / DC power converter disposed therein is supplied to the indoor unit control circuit, and the connection line that connects the indoor unit to the outdoor unit The electric power is transmitted to the outdoor unit via the, and the outdoor unit control circuit and the compressor driving inverter are operated.

  Thereby, it is possible to realize an air conditioner with high energy saving that suppresses the power loss generated by power transfer between the indoor unit and the outdoor unit to the maximum.

  In the second invention, in particular, the AC / DC power converter of the first invention converts the AC power from the commercial power source into DC power supplied to the indoor unit control circuit, and the AC power from the commercial power source. Is composed of an outdoor unit control circuit and a passive converter circuit that converts DC power to operate a compressor drive inverter.

  This realizes a highly energy-saving air conditioner that improves the power factor of AC power from the commercial power supply and minimizes power loss that occurs during power transfer between the indoor unit and the outdoor unit. Can do.

  In the third invention, in particular, the AC / DC power converter of the first invention converts AC power from a commercial power source into DC power for operating the indoor unit control circuit, the outdoor unit control circuit, and the compressor driving inverter. It is characterized by comprising a passive converter circuit.

  This can reduce the number of components, reduce the size of the electronic board, and reduce the cost of the entire product, and improve the power factor of AC power from the commercial power supply, while generating power from the indoor unit to the outdoor unit. It is possible to realize an air conditioner with high energy saving that suppresses power loss to the maximum.

  In the fourth invention, in particular, the AC / DC power converter of the first invention converts the AC power from the commercial power source into DC power supplied to the indoor unit control circuit, and the AC power from the commercial power source. PFC converter which has both the power factor improvement of the input AC power and the function of boosting the voltage of the output DC power when converting the DC to DC power for operating the outdoor unit control circuit and the compressor drive inverter And a circuit.

  This improves the power factor of the AC power from the commercial power supply and satisfies the power harmonic regulation even if the input current to the product is large, but the power loss that occurs in the power transfer between the indoor unit and the outdoor unit It is possible to realize an air conditioner with high energy saving that suppresses the maximum.

  In the fifth aspect of the invention, in particular, the AC / DC power converter of the first invention converts AC power from a commercial power source into DC power for operating the indoor unit control circuit, the outdoor unit control circuit, and the compressor driving inverter. In this case, the PFC converter circuit has a function of improving the power factor of the input AC power and boosting the voltage of the output DC power.

  This reduces the number of parts, reduces the size of the electronic board, and reduces the cost of the entire product, improves the power factor of AC power from the commercial power supply, and satisfies power supply harmonic regulations even when the input current to the product is large However, it is possible to realize an air conditioner with high energy saving that suppresses the power loss generated by the power transfer between the indoor unit and the outdoor unit to the maximum.

  According to a sixth aspect of the present invention, in any one of the fourth and fifth aspects, the indoor unit control circuit includes an indoor communication circuit that transmits and receives data to and from the outdoor unit control circuit, and the outdoor unit control circuit includes An outdoor communication circuit that transmits and receives data to and from the indoor unit control circuit is provided, and data relating to the compressor drive state is transmitted from the outdoor communication circuit to the indoor communication circuit. The indoor unit control circuit receives the data relating to the compressor drive state received. The operation of boosting or stopping the PFC converter circuit is controlled based on the above.

  As a result, the operation of the PFC converter circuit on the indoor unit side can be controlled according to the driving state of the compressor on the outdoor unit side, so that the optimum operation from the viewpoint of energy saving and safety is always performed. The added air conditioner can be realized.

  The present invention can attain the object of the present invention by making the main parts of the first to sixth inventions into embodiments, so the details of the embodiments corresponding to each claim will be described below with reference to the drawings. The description will be made with reference to the description of embodiments for carrying out the present invention.

  Note that the present invention is not limited to the present embodiment.

  Further, in the description of each embodiment, the same configuration and the same function and effect are given the same reference numerals, and redundant description will not be given.

(Embodiment 1)
FIG. 1 is an explanatory diagram showing a configuration of the air conditioner on the indoor unit side according to Embodiment 1 of the present invention.

  The indoor unit 100 is connected to a power plug 104 that can be plugged into an outlet for in-house power distribution where AC power is conveyed via a power cord 12.

  The power cord 12 from the power plug 104 is connected to the AC / DC power conversion unit 1 in the indoor unit 100, and the AC / DC power conversion unit 1 converts AC power into DC power.

  DC power is conveyed from the AC / DC power conversion unit 1 to the indoor unit control circuit 7 including the indoor / outdoor communication unit 8 by the positive side wiring 2 and the negative side wiring 3.

  In the indoor unit control circuit 7, the indoor fan motor 9 and the wind direction louver control motor 10 are controlled using DC power.

  The AC / DC power conversion unit 1 is provided with a positive side wiring 4 and a negative side wiring 5 for carrying DC power separately from the positive side wiring 2 and the negative side wiring 3, and the connection terminal 11 a and the connection terminal 11 b, respectively. It is connected to the.

  The indoor unit control circuit 7 includes an indoor / outdoor communication unit 8 that controls communication with the outdoor unit, and data is transferred by the communication wiring 6 connected to the connection terminal 11c.

  FIG. 2 is an explanatory diagram showing a circuit configuration on the outdoor unit side of the air conditioner according to Embodiment 1 of the present invention.

  The positive side wiring 4 connected to the connection terminal 33a is connected to the compressor driving inverter 30 and the outdoor unit control circuit 31 that convert DC power into three-phase AC power in the outdoor unit 101.

  The negative wiring 5 connected to the connection terminal 33 b is also connected to the compressor driving inverter 30 and the outdoor unit control circuit 31 that convert DC power into three-phase AC power in the outdoor unit 101.

  The output of the compressor driving inverter 30 is input to the compressor 34.

  In the outdoor unit control circuit 31, the DC power is used to control the outdoor fan motor 35 that blows air to the heat exchanger and the four-way valve 36 that switches the circulation direction of the refrigerant in the refrigeration cycle by cooling and heating.

  The outdoor unit control circuit 31 includes an indoor / outdoor communication unit 32 that controls communication with the indoor unit, and data transfer is performed by the communication wiring 6 connected to the connection terminal 33c.

  FIG. 3 is a diagram illustrating a state in which the indoor unit 100 illustrated in FIG. 1 and the outdoor unit 101 illustrated in FIG. 2 are connected by the indoor / outdoor connection wiring 20 and further connected to the in-house power distribution system.

  A distribution line 102 installed in the house is connected to a house wiring 13 that carries AC power from a commercial power source.

  An outlet 103 is connected to the other end of the home wiring 13 connected to the switchboard 102. By inserting the power plug 104 into the outlet 103, AC power having a voltage of about 100V is temporarily supplied to the indoor unit 100. Then, the direct current power is converted into direct current power having a voltage of 100 V or higher and smoothed and rectified by the alternating current direct current power conversion unit 1, and the direct current power is supplied to the outdoor unit 101 via the indoor / outdoor connection wiring 20.

  With the configuration described above, in the first embodiment, in the power transfer between the indoor unit and the outdoor unit in the air conditioner, the voltage value is higher than the voltage value in the AC power transfer performed by the conventional configuration. Even if the outdoor unit is operating with the same capacity due to DC power transfer with voltage, the current value flowing through the indoor / outdoor connection wiring decreases, and the result of multiplying the resistance component at this point and the square of the current value The power loss represented can be reduced.

(Embodiment 2)
Next, a second embodiment of the present invention will be described with reference to the drawings.

  In the second embodiment, as shown in FIG. 4, in the AC / DC power converter 1 in the indoor unit 100, the rectifying / smoothing circuit 21 that outputs the DC power supplied to the indoor unit control circuit 7 and the outdoor unit 101 are provided. A passive converter circuit 22 that outputs supplied DC power is provided.

  Note that the configuration of the outdoor unit 101 is omitted as it is the same as that described in Embodiment 1 as it is.

  In the rectifying / smoothing circuit 21 that outputs DC power supplied to the indoor unit control circuit 7, AC power from the commercial power source is rectified by the diode bridge 50, and converted to DC power with the voltage ripple suppressed by the smoothing capacitor 51.

  When AC power having a voltage value of 100 V is input to the rectifying and smoothing circuit 21, DC power of approximately 140 V is output between the positive side wiring 2 and the negative side wiring 3 and input to the indoor unit control circuit 7.

  On the other hand, the passive converter circuit 22 that outputs DC power supplied to the outdoor unit 101 forms a voltage doubler rectifier circuit with the diode bridge 52 and the smoothing capacitors 53a and 53b stacked in two stages, and the power factor is improved on the input side. The reactor 54 for use was arranged.

  When AC power having a voltage value of 100 V is input to the passive converter circuit 22, DC power of approximately 280 V is output between the positive side wiring 4 and the negative side wiring 5, and the outdoor unit is connected via the indoor / outdoor connection wiring 20. 101.

  Here, the indoor / outdoor connection wiring 20 in the case where 100V AC power shown in the conventional example is conveyed from the indoor unit to the outdoor unit and in the case where 280V DC power converted by the passive converter circuit 22 is conveyed. Compare power loss at.

  For example, if the length of the indoor / outdoor connection wiring 20 connecting the indoor unit and the outdoor unit is 5 m, the total length of the positive side wiring 4 and the negative side wiring 5 is 10 m, and the wire used here If the electric resistance per unit is 9 Ω / km, an electric resistance component of 90 mΩ exists in the indoor / outdoor connection wiring 20.

  FIG. 5 shows a characteristic graph of an electric resistance of 90 mΩ with the current value on the horizontal axis and the power loss on the vertical axis. The power loss is obtained from the relationship obtained by multiplying the square of the current value by the resistance value. It is what

  Assuming that 100V AC power is transferred from the indoor unit to the outdoor unit and the power consumption of the outdoor unit is operated at 1500 W, in the indoor / outdoor connection wiring 20, the positive side wiring 4 and the negative side wiring 5 are approximately effective values. Thus, a current of 15 A flows, and a power loss of about 20.3 W is generated from the characteristic graph shown in FIG.

  However, if 280V DC power is transferred from the indoor unit to the outdoor unit and the power consumption of the outdoor unit is similarly operated at 1500 W, in the indoor / outdoor connection wiring 20, the positive side wiring 4 and the negative side wiring 5 are connected. Therefore, a current of about 5.36 A flows, and is suppressed by a power loss of about 2.6 W from the characteristic graph shown in FIG.

  In Embodiment 2 of the present invention, when the power consumption of the outdoor unit is operated at 1500 W, it is clear from the above-described theoretical calculation as compared with the case where conventional AC power of 100 V is transferred from the indoor unit to the outdoor unit. Thus, the power loss improvement of about 17.7 W was achieved.

(Embodiment 3)
Next, Embodiment 3 of the present invention will be described with reference to the drawings.

  In the third embodiment, as shown in FIG. 6, in the AC / DC power converter 1 in the indoor unit 100, a passive converter circuit 22 that outputs DC power supplied to the indoor unit control circuit 7 and the outdoor unit 101. It was set as the structure which provides only.

  Note that the configuration of the outdoor unit 101 is omitted as it is the same as that described in Embodiment 1 as it is.

  The passive converter circuit 22 that outputs DC power supplied to the indoor unit control circuit 7 and the outdoor unit 101 is configured by a diode bridge 52 and two-stage smoothing capacitors 53a and 53b to form a voltage doubler rectifier circuit. It was assumed that a reactor for improving the power factor was arranged.

When AC power having a voltage value of 100 V is input to the passive converter circuit 22, approximately 2
DC power of about 80 V is output and input to the indoor unit control circuit 7 through the positive side wiring 2 and the negative side wiring 3 and to the outdoor unit 101 through the positive side wiring 4 and the negative side wiring 5.

  With the above-described configuration, the same effects as those of the second embodiment can be obtained in the third embodiment, and the circuit components in the AC / DC power converter 1 can be minimized to reduce the size and cost of the device. Can be realized.

(Embodiment 4)
Next, a fourth embodiment of the present invention will be described with reference to the drawings.

  In the fourth embodiment, as shown in FIG. 7, in the AC / DC power converter 1 in the indoor unit 100, the rectifying / smoothing circuit 21 that outputs the DC power supplied to the indoor unit control circuit 7 and the outdoor unit 101 are provided. A PFC converter circuit 23 having a function of improving the power factor of the input AC power and boosting the voltage of the output DC power when converting to the supplied DC power is provided.

  Note that the configuration of the outdoor unit 101 is omitted as it is the same as that described in Embodiment 1 as it is.

  In the rectifying / smoothing circuit 21 that outputs DC power supplied to the indoor unit control circuit 7, AC power from the commercial power source is rectified by the diode bridge 50, and converted to DC power with the voltage ripple suppressed by the smoothing capacitor 51.

  When AC power having a voltage value of 100 V is input to the rectifying and smoothing circuit 21, DC power of approximately 140 V is output between the positive side wiring 2 and the negative side wiring 3 and input to the indoor unit control circuit 7.

  On the other hand, in addition to the components provided in the passive converter circuit 22 shown in the second embodiment, the PFC converter circuit 23 that outputs DC power supplied to the outdoor unit 101 includes one side of the wiring that carries AC power. A second diode bridge 55 is connected to the negative wiring 5 that carries DC power, and a switching element 56 made of, for example, IGBT or MOSFET is connected to both output ends of the second diode bridge 55. ing.

  The PFC converter circuit 23 controls the ON / OFF timing of the switching element 56 while improving the power factor of the AC power by the current flowing through the reactor 54 and the second diode bridge 55 when the switching element 56 is turned on. A function of boosting the voltage of the output DC power possible by controlling is provided.

  With the DC power boosting function of the PFC converter circuit 23, AC power having a voltage value of 100 V is output, and DC power of about 380 V is output between the positive side wiring 4 and the negative side wiring 5, and indoors and outdoors. The signal is input to the outdoor unit 101 via the connection wiring 20.

  Here, under the same conditions as in the second embodiment, when the length of the indoor / outdoor connection wiring 20 connecting the indoor unit and the outdoor unit is 5 m and an electrical resistance component of 90 mΩ exists, 380 V DC power is Assuming that the outdoor unit is transported from the indoor unit to the outdoor unit and is similarly operated at a power consumption of 1500 W, in the indoor / outdoor connection wiring 20, a current of approximately 3.95 A is supplied to the positive side wiring 4 and the negative side wiring 5. From the characteristic graph shown in FIG. 5, the power loss is about 1.40 W.

In Embodiment 4 of the present invention, when the power consumption of the outdoor unit is operated at 1500 W, compared to the power loss of about 20.3 W when the conventional 100 V AC power is transferred from the indoor unit to the outdoor unit. The power loss improvement of about 18.9W was achieved.

  It is possible to increase the maximum capacity of the equipment by extracting more active power from the commercial power supply and supplying more active power to the equipment of the load, and it is possible to reduce the harmonic current of the power supply that has become a problem in recent years. As a result, it was possible to realize a highly energy-saving air conditioner that satisfactorily suppressed power loss caused by power transfer between the indoor unit and the outdoor unit while satisfying the power harmonic regulations.

(Embodiment 5)
Next, a fifth embodiment of the present invention will be described with reference to the drawings.

  In the fifth embodiment, as shown in FIG. 8, only the PFC converter circuit 23 that outputs DC power supplied to the indoor unit control circuit 7 and the outdoor unit 101 is used in the AC / DC power converter 1 in the indoor unit 100. It was set as the structure which provides.

  Note that the configuration of the outdoor unit 101 is omitted as it is the same as that described in Embodiment 1 as it is.

  The PFC converter circuit 23 that outputs DC power supplied to the indoor unit control circuit 7 and the outdoor unit 101 is supplied with AC power by current flowing through the reactor 54 and the second diode bridge 55 when the switching element 56 is turned on. The function of boosting the output DC power voltage possible by controlling the on / off timing of the switching element 56 is provided.

  When AC power having a voltage value of 100 V is input to the PFC converter circuit 23, DC power of about 380 V is output, and the positive side wiring 2 and the negative side wiring 3 lead to the indoor unit control circuit 7 and the positive side wiring. 4 and the negative side wiring 5 are inputted to the outdoor unit 101.

  With the above-described configuration, the same effects as in the fourth embodiment can be obtained in the fifth embodiment, and the circuit components in the AC / DC power converter 1 can be minimized to reduce the size and cost of the device. Can be realized.

(Embodiment 6)
Next, a sixth embodiment of the present invention will be described with reference to the drawings.

  In the sixth embodiment, in the air conditioner having the configuration shown in the fourth or fifth embodiment, the indoor unit control circuit 7 includes an indoor / outdoor communication unit 8 that performs data transmission / reception with the outdoor unit control circuit 31. The outdoor unit control circuit 31 is provided with an indoor / outdoor communication unit 32 that performs data transmission / reception with the indoor unit control circuit 7, and data related to the driving state of the compressor is transmitted from the indoor / outdoor communication unit 32 to the indoor / outdoor communication unit 8, The indoor unit control circuit 7 controls the boosting and stopping operations of the PFC converter circuit 23 based on the received data relating to the driving state of the compressor.

  FIG. 9 is a diagram showing a part of the control flow on the indoor unit side and outdoor unit side of the air conditioner according to Embodiment 6 of the present invention.

First, the indoor unit control circuit 7 acquires room temperature information from a set temperature input by the user through the remote controller or a temperature sensor (not shown) (Step 1). Next, the indoor unit control circuit 7 calculates the rotation speed of the compressor 34 based on the information (Step 2), and transmits the rotation value to the indoor / outdoor communication unit 32 via the indoor / outdoor communication unit 8 ( Step 3). The outdoor unit control circuit 31 that has received the rotation value via the indoor / outdoor communication unit 32 controls the compressor 34 so that the compressor 34 rotates at the rotation value (Step 4).

  The outdoor unit control circuit 31 constantly monitors the state of the compressor 34, and the drive information (actual rotational speed information and abnormal data) regarding the drive state of the compressor 34 is transmitted via the indoor / outdoor communication unit 32. (Step 5). The indoor unit control circuit 7 that has received the drive information via the indoor / outdoor communication unit 8 refers to the abnormal data in the drive information regarding the drive state of the compressor 34, and no abnormality is recognized in the compressor 34. Determines the operation of the PFC converter circuit 23, and conversely, if an abnormality is recognized in the compressor 34, the PFC converter circuit 23 is determined to be stopped (Step 6). Further, it calculates how much the output voltage of the PFC converter circuit 23 is boosted based on the actual rotational speed information in the drive information relating to the driving state of the compressor 34 (Step 7), and determines the operation of the PFC converter circuit 23 and the boosted voltage value. Alternatively, whether or not to perform the switching operation of the switching element 56 based on the stop determination, the switching time when the switching operation is performed, and the like are controlled (Step 8).

  As a result, the operation of the PFC converter circuit on the indoor unit side can be controlled according to the driving state of the compressor on the outdoor unit side, so that the optimum operation from the viewpoint of energy saving and safety is always performed. The added air conditioner could be realized.

  Although various embodiments of the present invention have been described above, the present invention is not limited to the matters shown in the above-described embodiments, and those skilled in the art can make modifications and applications based on the description and well-known techniques. This is also the scope of the present invention, and is included in the scope of seeking protection.

  The present invention is not limited to an air conditioner, and can be applied to all electrical devices connected to a system that distributes AC power from a commercial power source in a house or building.

DESCRIPTION OF SYMBOLS 1 AC / DC power converter 2, 4 Positive side wiring 3, 5 Negative side wiring 6 Communication wiring 7 Indoor unit control circuit 8, 32 Indoor / outdoor communication part 9 Indoor fan motor 11a, 11b, 11c, 33a, 33b, 33c Connection Terminal 12 Power cord 13 Home wiring 20 Indoor / outdoor connection wiring 21 Rectification smoothing circuit 22 Passive type converter circuit 23 PFC converter circuit 30 Compressor drive inverter 31 Outdoor unit control circuit 34 Compressor 35 Outdoor fan motor 36 Four-way valve 50, 52 Diode Bridge 51, 53a, 53b, 53c Smoothing capacitor 54 Reactor 55 Second diode bridge 56 Switching element 100 Indoor unit 101 Outdoor unit 102 Switchboard 103 Outlet 104 Power plug

Claims (6)

In a separate type air conditioner configured by an outdoor unit including an indoor unit and a compressor, and receiving AC power from a commercial power source in the indoor unit,
AC power from a commercial power source is converted into DC power by an AC DC power converter disposed in the indoor unit,
The DC power converted by the AC / DC power conversion unit is supplied to the indoor unit control circuit, and is transmitted to the outdoor unit via a connection line connecting the indoor unit and the outdoor unit. And an air conditioner configured to operate an inverter for driving a compressor. The air conditioner according to claim 1,
The AC / DC power conversion unit is a smoothing rectifier circuit that converts AC power from a commercial power source into DC power supplied to the indoor unit control circuit;
An air conditioner comprising: a passive converter circuit that converts AC power from a commercial power source into DC power for operating the outdoor unit control circuit and the compressor driving inverter. The air conditioner according to claim 1,
The AC / DC power conversion unit includes a passive converter circuit that converts AC power from a commercial power source into DC power for operating the indoor unit control circuit, the outdoor unit control circuit, and the compressor driving inverter. An air conditioner characterized by The air conditioner according to claim 1,
The AC / DC power conversion unit is a smoothing rectifier circuit that converts AC power from a commercial power source into DC power supplied to the indoor unit control circuit;
When converting AC power from a commercial power source into DC power for operating the outdoor unit control circuit and the compressor driving inverter, the power factor improvement of the input AC power and the voltage of the output DC power are An air conditioner comprising a PFC converter circuit having a function of increasing pressure. The air conditioner according to claim 1,
The AC / DC power converter converts AC power from a commercial power source into AC power to be converted into DC power for operating the indoor unit control circuit, the outdoor unit control circuit, and the compressor driving inverter. An air conditioner comprising a PFC converter circuit having a function of improving the power factor of electric power and boosting the voltage of the output DC power. An air conditioner according to claim 4 or 5,
The indoor unit control circuit includes an indoor communication circuit that transmits and receives data to and from the outdoor unit control circuit,
The outdoor unit control circuit includes an outdoor communication circuit that transmits and receives data to and from the indoor unit control circuit.
Data relating to the driving state of the compressor is transmitted from the outdoor communication circuit to the indoor communication circuit, and the indoor unit control circuit performs the boosting and stopping operations of the PFC converter circuit based on the received data relating to the driving state of the compressor. An air conditioner characterized by control.